SPONSORED BY NATIONAL AERONAUTICS AND SPACE ADMINISTRATION LUNAR AND PLANETARY INSTTTIJTE NASA JOHNSON SPACE CENTER

LPI Program to Technical Sessions

TmRTY-FouRTHLUNARANDPLANETARY SCIENCE CONFERENCE

March 17-21, 2003

Sponsored by

National Aeronautics and Space Administration Lunar and Planetary Institute NASA Johnson Space Center

Program Committee

Stephen J. Mackwell, Co-Chair, Lunar and Planetary Institute Eileen K. Stansbery, Co-Chair, NASA Johnson Space Center Bruce Banerdt, Jet Propulsion Laboratory Gretchen Benedix, Washington University Barbara Cohen, University of Hawai'i Jeff Gillis, Washington University Joe Hahn, Lunar and Planetary Institute Chris Herd, Lunar and Planetary Institute Robbie Herrick, Lunar and Planetary Institute Mike Kelley, Georgia Southern University Walter Kiefer, Lunar and Planetary Institute Laurel Kirkland, Lunar and Planetary Institute David Kring, University ofArizona Rachel Lentz, University of Tennessee Julie Moses, Lunar and Planetary Institute Don Musselwhite, NASA Johnson Space Center Jeff Plaut, Jet Propulsion Laboratory Kevin Righter, NASA Johnson Space Center Mark Robinson, Northwestern University Alex Ruzicka, Portland State University Pete Schultz, Brown University Chip Shearer, University of New Mexico Tom Stepinski, Lunar and Planetary Institute Kathie Thomas-Keprta, Lockheed Martin Mike Zolensky, NASA Johnson Space Center Bar

lobby A En1rance c

Hunt Center Entrance

To South Shore Harbour Fitness Center (Poster SeS5ions)

\ ERRATA 34th Lunar and Planetary Science Conference March 17-21,2003

Tuesday, March 18, 2003

Canceled Oral Presentation Mars 2002 Rover and Spectral Studies Trautner R. * Chicarro A. C. Martin P. D. Coordinated Science Operations of Mars Express Orbiter and Lander [#1634] The Mars Express orbiter and the Beagle2 lander carry a comprehensive set of instruments for the investigation of Mars. The orbiter and lander science operations will be coordinated in order to maximize the scientific output of the Mars Express mission.

Thursday, March 20, 2003

Canceled Oral Presentation Recent Water on Mars: Ground Water, Ground Ice, and Gullies Mellon M. T. * Theory of Ground Ice on Mars and Implications to the Neutron Leakage Flux [#1916] In this work we present new calculations of the geographic and depth distribution of ground ice on Mars and draw comparisons with the inferred distribution of ice from Odyssey Neutron Spectrometer observations.

Canceled Poster Origins of Planetary Systems Ireland T. R. Initial 182HfP0Hf and W-Isotopic Systematics of the Early Solar System [#1508] Hf-W systematics are affected by regional metal-silicate fractionation in the solar nebula as well as planetary differentiation.

Change from Print-Only to Poster Origins of Planetary Systems McHone J. F. Killgore M. Verish R. S. Roddy D. J. Non-Impact Origin for Nevada's Elko Crater Field [#1572] Field examination of rimmed depressions near Elko, Nevada reveals no conclusive evidence for meteorite impact. Their limited occurrence within similar geological unit along valley flanks suggests slumping and subsidence due to groundwater sapping.

Canceled Poster Instruments and Techniques for Mars Lucey P. G. Wilcox B. B. Gillis J. J. Hamilton V. E. Mini-SMIFTS: A High Spatial Resolution Thermal Infrared Spectrometer for Mars Landers [#1365] We are developing an imaging infrared spectrometer for Mars landed missions that will provide significantly higher spatial resolution than mini-TES, and collect these data at much higher rates.

Change from Print-Only to Poster Instruments and Techniques for Mars Byrnes J. M. de SilvaS. L. Formation of Martian Paterae: Insights from Terrestrial Ignimbrite Shields [#1175] Morphologic comparison of Martian paterae and terrestrial ignimbrite shields suggests similar formation processes: eruption of extensive pyroclastics from low eruption columns, followed by downsagging of the central region and extrusion of lava flows.

Fridav. March 21. 2003

Canceled Oral Presentation Future Mars and Asteroid Missions, Date, and Landing Sites Asphaug E.* Colwell J. Dissly R. Kanizay K. Petr V. Scheeres D. J. Meteoroid Bombardment and Blast Experiments on Asteroids [#1537] Cohesion and other soil-mechanical characteristics may dominate over gravity or traditional strength effects in the formation of craters on asteroids. We propose asteroid surface blast experiments to be imaged at high frame rate from rendezvous orbit.

CONFERENCE INFORMATION

Registration - LPI Open House

A combination Registration/Open House will be held Sunday, March 16, 2003, from 5:00 p.m. until 8:00 p.m. at the Lunar and Planetary Institute. Registration will continue at the South Shore Harbour Resort and Conference Center, Monday through Thursday, 8:00 a.m. to 5:00 p.m. A shuttle bus will be available to transport participants between the LPI and local hotels Sunday evening from 4:45 p.m. to 8:30 p.m.

Business Center

There will no longer be fax or copy service available at the LPSC registration desk. These services are available for a fee at the hotel business center or you may use the LPI facilities (see note about daily shuttle service to the LPI below). Anyone needing to contact attendees during the conference may call 281-334-1000. These messages may be picked up at the LPSC registration desk.

Shuttle Bus Service

A shuttle bus service between the LPI, South Shore Harbour, and various hotels will operate daily. A detailed schedule of the shuttle routes is in your registration packet and is available at the registration desk.

GUIDE TO TECHNICAL SESSIONS AND ACTIVITIES

Sunday Evening, 5:00p.m. Education and Public Outreach: Open House Display

Monday Morning, 8:30a.m. Salon A South Pole-Aitken Sample Return: Capstone, Keystone, Cornerstone 10:15 a.m. Lunar Basalts: Deep Insights Salon B SPECIAL SESSION: Mars Odyssey: One Year of Science at Mars Salon C Poking Holes: Terrestrial Impacts Marina Plaza Ballroom The Wrath of Khandrules Monday Afternoon, 1:30 p.m. Salon B PLENARY SESSION Masursky Lecture by Peter Goldreich followed by Presentation to the 2002 GSA Stephen E. Dwornik U.S. Citizen Student Paper Award Winners Monday Afternoon, 2:15p.m. Salon A Space Weather on Airless Bodies: Observations, Effects, and Depths Salon B Mars Volcanism Salon C SPECIAL SESSION: Chicxulub Scientific Drilling Project Marina Plaza Ballroom Nucleosynthesis Monday Evening, 5:30p.m. LPI Great Room Reception honoring 2002 Stephen E. Dwornik Award Winners

Tuesday Morning, 8:30a.m. Salon A Moving and Grooving Ice Salon B Mars Surface Composition from Infrared Spectroscopy Salon C Digging Deeper: Impact Experiments and Theory Marina Plaza Ballroom Carbonaceous Chondrites: Tales from the Dark Side Tuesday Afternoon, 1:30 p.m. Salon A Lunar Science: Regional, Sample, Geoidal Salon B Mars 2003 Rover and Spectral Studies Salon C Mars Geophysics and Tectonics Marina Plaza Ballroom Carbonaceous Chondrites: Water and Organics for Dummies Tuesday Evening, 7:00-9:30 p.m. Gymnasium Poster Session I Chicxulub Poking Holes: Terrestrial Impact Digging Deeper: Impact Experiments and Theory South Pole-Aitken Sample Mission Moon and Mercury: Early Evolution, Basalts, and Regolith MER 2003 Landing Sites: Hazards of Geology Mars Odyssey: One Year of Science at Mars Red Hot Lava: Mars Volcanism Mars Suiface Composition from Infrared Spectroscopy Mars Suiface, Weathering, and Hydrothermal Alteration Mars Tectonics and Geophysics: From Holes to Poles Mars Atmosphere and Climate Mars Geologic Mapping Maps 'n Bits: Cartography, Data Access, and Archiving I'll Take Meteoritic Potpourri for $200, Please Experiments: Rocks Made to Order CCR: Carbonaceous Chondrite Revival Chondrules Outer Body Experiences Wednesday Morning, 8:30a.m. Salon A Io and Beyond Salon B Baby, It's Cold (and Windy) Outside: Aeolian and Glacial Processes on Mars Salon C Asteroids and Comets Marina Plaza Ballroom Martian Meteorites: We Come in Pieces Wednesday Afternoon, 1:30 p.m. Salon A IDPs: From Comets and Asteroids to Aerogel Salon B Mars Geomorphology and Impacts Salon C Evolution of the Martian Interior Marina Plaza Ballroom Achondrites to Zchondrites Wednesday Afternoon, 5:00p.m. Salon B NASA Headquarters Briefing Wednesday Evening, 6:00-9:30 p.m. Campbell Hall, Chili Cook-Off and Barbecue Dinner Pasadena Fairgrounds

Thursday Morning, 8:30a.m. Salon A Missions and Instruments 9:30 a.m. Venus Salon B Mars Wet and Wild: Valley Networks, Outflow Channels, and Basin Flooding Salon C Origins of Planetary Systems Marina Plaza Ballroom Basaltic Achondrites: Go with the Flow Thursday Afternoon, 1:30 p.m. Salon A Ordinary Chondrites: Who Could Ask for More? Salon B Recent Water on Mars: Ground Water, Ground Ice, Gullies Salon C Evolution of the Early Earth Marina Plaza Ballroom Presolar Grains Thursday Evening, 7:00-9:30 p.m. Gymnasium Poster Session II Origins of Planetary Systems Early Evolution of the Terrestrial Planets Lunar Remote Sensing: Predictions, Techniques, Results, Archives, and Models Lunar Geophysics Venus: The Forgotten Planet Mars Terrestrial Analogs Water on Mars Today (Maybe Yesterday) Mars Wet and Wild Mars Geomorphology Mars Impacts Mars Aeolian Processes Mars Bipolar Syndrome Instruments and Techniques for Mars Mars Missions GAls: Refractory Direct to You Ordinary Chondrites: Who Could Askfor More? Achondrites to Zchondrites Martian Meteorites: We Come in Pieces Asteroids and Comets Interplanetary Dust and Micrometeorites Education and Public Outreach Missions and Instruments Astrobiology: The New Detectives

Friday Morning, 8:30a.m. SalonA Astrobiology: The New Detectives SalonB Mars Geolgoy and Analog Studies Salon C Future Mars and Asteroid Missions, Data, and Landing Sites Marina Plaza Ballroom CAis: Refractory Direct to You * Designates speaker

Sunday, March 16, 2003 EDUCATION AND PUBLIC OUTREACH: OPEN HOUSE DISPLAY 5:00 p.m. LPI

Molineux A. Gunter M. IMPACT: Texas and the World. An Interactive CDROM for Educational Outreach [#2061] Accession of the tektite collection of the late Virgil Barnes into the collections of the Texas Memorial Museum provided an opportunity to develop an interactive CD-ROM covering topics relating to tektites, impact sites and meteorites.

Allen J. S. Tobola K. W. Lindstrom M. L. Exploring the Solar System Activities Outline- Hands-On Planetary Science for Formal Education K-I4 and Informal Settings [#1629] The Johnson Space Center ARES Education team has compiled a variety of NASA solar system activities to produce an annotated thematic outline useful to classroom educators and informal educators as they teach space science.

Grier J. A. SteelS. J. Dussault M. E. Gould R. R. Determining Age: An Educational Perspective on Our Place in Time [#1692] "Our Place in Time" is a developing content strand keyed to the questions "How old is something?" and "How do you find out?" We will present materials related to this strand for discussion and feedback, as well as showcase other resources.

Keller J. M. Boynton W. M. Enos H. L. Hamara D. Janes D. Kerry K. Pompea S.M. Prather E. E. Quinn M. Slater T. F. Educational Use and Effectiveness of an Auditory Display of Mars GRS Data [#2036] A unique and alternative education and public outreach product allows students to "see" and "hear" seasonal variations in hydrogen signal detected by Mars GRS. Plans to test the educational effectiveness of this auditory display will be described.

Williams S. H. Zimbelman J. R. "How Good is 'Good Enough'?": Analysis of Cost/Quality Trade-Offs in Planetary Remote Sensing for Both Research and Education [#1614] Determination of the minimum resolution necessary for interpretation of diagnostic features can prevent overspending on data acquisition/analysis, assess needs for future surveys, and inspire engaging and informative educational activities.

Berczi Sz. Fabriczy A. Hargitai H. Hegyi S. Illes E. Kabai S. Kovacs Zs. Kereszturi A. Opitz A. Sik A. Varga T. Weidinger T. Atlas Series of the Solar System (5 Booklets) and Other Works for Education and Public Outreach by Cosmic Materials, Planetology and Hunveyor Groups of the Eotvos University, Hungary [#1305] Our Atlas Series consists of five booklets of interactive material in space science education: ( 1) Planetary petrography, (2) Surveyor-Hunveyor educational robotics, (3) planetary surfaces, (4) planetary atmospheres, (5) space science and geometry.

34th LPSC Program ______Monday, March 17, 2003 SOUTH POLE-AITKEN SAMPLE RETURN: CAPSTONE, KEYSTONE, CORNERSTONE 8:30 a.m. Salon A

Chairs: J. Longhi J. J. Gillis

Pieters C. M. * Duke M. Head J. W. III Jolliff B. Science Options for Sampling South Pole-Aitken Basin [#1366] Selecting samples from the enormous SPA basin to meet the primary NRC science objectives can be easily accomplished with current data about the basin. Specific site selection(s) can then also include several exciting secondary science options.

DukeM.B. * Challenges for Sample Return from the Lunar South Pole-Aitken Basin [#1684] Sample return from the South Pole-Aitken Basin is a high priority objective for planetary science. Lessons taken from the review of a previous proposal will help define a competitive mission for the NASA New Frontiers Program.

Lawrence D. J. * Pieters C. M. Elphic R. C. Feldman W. C. Gasnault O. Maurice S. Prettyman T. H. Regional Elemental Abundances Within South Pole-Aitken Basin as Measured with Lunar Prospector Gamma-Ray Spectrometer Data [#1679] We use LP-GRS data to determine that the composition of non-mare materials within SPA basin is consistent with interpretations of Clementine data that characterize these materials as noritic breccias derived from the lower crust or mantle after removal of the anorthositic upper crust.

Haskin L.A.* Gillis J. J. Jolliff B. L. Korotev R. L. Regolith in the South Pole-Aitken Basin is Mainly Indigenous Material [#1434] Ejecta deposit modeling shows that 80% of the material in the regolith of the South Pole-Aitken basin is material that originated from within the basin, thus a mission to a well-chosen site within the basin is likely to yield a meaningful sample of SPA floor material.

Jolliff B. L. * Haskin L.A. Korotev R. L. Papike J. J. Shearer C. K. Pieters C. M. Cohen B. A. Scientific Expectations from a Sample of Regolith and Rock Fragments from the Interior of the Lunar South Pole-Aitken Basin [#1989] Integrated studies of the geochronology, geochemistry, mineral chemistry, and petrology of many small rock fragments in a lunar regolith sample can address the fundamental questions that are posed for a South Pole-Aitken Basin sample return mission.

Gillis J. J. * Jolliff B. L. Lucey P. G. South Pole-Aitken Sample Return Mission: Collecting Mare Basalts from the Far Side of the Moon [#2065] Using Clementine and Lunar Prospector data we consider the probability that a sample mission to a site within the South Pole-Aitken Basin would return basaltic material and be the first opportunity to sample basalts from the far side of the Moon.

15-MINUTE DISCUSSION PERIOD

2 34TH LPSC Program Monday, March 17, 2003 LUNAR BASALTS: DEEP INSIGHTS 10:15 a.m. Salon A

Chairs: J. Longhi J. J. Gillis

Rutherford M. J. * Papale P. Eruption Conditions and Mechanism ofA17 Orange Glass Eruption: Petrology and Modeling Data [#1322) The gas phase in the Al7 orange glass magma is constrained by C-0-S phase equilibria and the compositions of glass and phenorysts. Equilibrium C-0 gas generation by C-oxidation is at 4 km. Modeling constrains the C necessary to achieve fragmentation of the orange glass melt prior to eruption.

LonghiJ. * Green Glasses: New Pressure Calibration, New Ascent Mechanism, New Calculations, Same Story [#1528) New melting experiments have demonstrated pressure intensification in BaC03 pressure assemblies. Also, a new model for run-away dike propagation raises the possibility of rapid magma transport directly from deep source regions.

Shearer C. K. * Neal C. Draper D. Papike J. J. Agee C. Melting in the Deep Lunar Mantle [#1456) We focus upon both the trace element characteristics of mare basalts and pyroclastic glasses and the high pressure (>2.5 GPa) phase equilibria of several pyroclastic glass compositions.

Walker R. J. * Horan M. F. Shearer C. K. Papike J. J. Osmium Isotope and Highly Siderophile Element Compositions of Lunar Orange and Green Glasses [#1579] Abundances of highly siderophile elements (HSE) in lunar orange and green glasses are highly variable. The most fractionated HSE patterns, relative to chondrites, probably most closely represent the indigenous lunar compositions. Most samples analyzed contain a meteoritic component.

Morgan Z. T. * Liang Y. Hess P. C. Fractionation of Eufrom Other REE by Melt-Rock Reaction in the Lunar Mantle [#1031) We modeled a dense LMO melt descending by porous flow through earlier harzburgite cumulates on the moon and found large fractionation of Eu from the rest of the REE in the metasomatized cumulates.

Beck A. R. * Hess P. C. Liang Y. Metasomatising the Lunar Mantle with TiOrrich Melts: A Disequilibrium Porous Flow Model [#1040) Our model investigates the ability of a Ti02-rich melt to fertilize lunar mantle cumulates via disequilibrium porous flow. We found that partial melts of these metasomatised cumulates display chemical signatures unlike those of the picritic glasses.

34th LPSC Program ______3 Monday, March 17, 2003 SPECIAL SESSION MARS ODYSSEY: ONE YEAR OF SCIENCE AT MARS 8:30 a.m. Salon B

Chairs: J. J. Plaut P. R. Christensen

Plaut J. J. * 2001 Mars Odyssey Team Mars Odyssey Science: The First Year and Beyond [#1919] The 2001 Mars Odyssey orbital science mission officially began in late February, 2002. This paper provides an overview of the mission's first year and a preview of future operations.

Zeitlin C.* Cleghorn T. Cucinotta F. Saganti P. Andersen V. LeeK. Pinsky L. Atwell W. Turner R. Results from the Martian Radiation Environment Experiment MARIE [#1878] We will present results from the Martian Radiation Environment Experiment (MARIE). MARIE is aboard the 2001 Mars Odyssey spacecraft, measuring the charged particles that make up the Galactic Cosmic Rays and also those emitted in Solar Particle Events.

Cleghorn T. F.* Saganti P. B. Zeitlin C. J. Cucinotta F. A. Solar Particle Events Observed by the Odyssey MARIE Instrument at Mars: Dose and Model Calculations [#1022] This work describes the recent work on radiation dose analyses using data from the MARIE instrument on Odyssey. In particular, the solar particle events observed will be described, as well as comparisons between observations and model calculations.

Keating G. M. * Theriot M. Jr. Tolson R. Bougher S. Forget F. Forbes J. Global Measurements of the Mars Upper Atmosphere: In Situ Accelerometer Measurements from Mars Odyssey 200I and Mars Global Surveyor [#1142] The paper discusses the discovery of winter polar warmings from the Mars Odyssey accelerometer, complementary measurements with the MGS accelerometer, upper atmosphere response to dust storms, planetary wave activity and latitudinal/seasonal variations.

Christensen P.R.* Bandfield J. L. Bell J. F. III Hamilton V. E. Ivanov A. Jakosky B. M. Kieffer H. H. Lane M.D. Malin M. C. McConnochie T. McEwen A. S. McSween H. Y. Jr. Moersch J. E. Nealson K. H. Rice J. W. Jr. Richardson M. I. RuffS. W. Smith M.D. Titus T. N. Early Results from the Odyssey THEM IS Investigation [#1519] The Mars Odyssey THEMIS thermal infrared and visible/near-IR multi-spectral images have been used to study geologic units and layers, the distribution of rocks, bedrock, sand, and dust, 100-m scale compositional variations, polar processes, and visible color and morphology.

Rogers D.* Bandfield J. L. Christensen P.R. Global Bedrock Composition Mapping on Mars Using THEMIS and TES Data [#2082] Nighttime temperatures measured with THEMIS are used to locate exposed bedrock surfaces on Mars. Corresponding daytime THEMIS images and TES emissivity spectra are used to determine a composition for these bedrock surfaces.

Hamilton V. E.* Christensen P.R. Detailed Mineralogical Analyses of Martian Meteorite-like Terrains Using MGS TES and Odyssey THEMIS Data [#1982] New THEMIS infrared images show, in impressive detail, the distribution of previously identified martian meteorite-like materials. New details of the relationship between these materials and local geology will be presented.

4------~34th LPSC Program Bell J. F. III* McConnochie T. WolffM. J. Christensen P.R. Mehall G. Malin M. Caplinger M. Ravine M. Cherednik L. L. Bender K. C. Murray K. THEMIS Science Team Color Imaging of Mars with the Visible Imaging Subsytem (VIS) on the Mars Odyssey THEMIS Instrument [#1993] The THEMIS Visible Imaging Subsystem (VIS) on the NASA Mars Odyssey orbiter is a five-color, 1024 x 1024 interline transfer CCD camera that acquires high spatial resolution 18 to 72 m/pixel multispectral images (425 to 860 nm) from Mars orbit.

Reedy R. C. * Evans L. G. BrUckner J. Kim K. J. Boynton W. V. Gamma Rays in a Spectrum from the Mars Odyssey Gamma-Ray Spectrometer [#1592] About 250 peaks and broad features were observed in a long spectrum from the Mars Odyssey Gamma-Ray Spectrometer, most of which have been identified. Many are background lines from Ge, Mg, Ti, Zn, and other elements near the GRS.

Boynton W. V. * Taylor G. J. Hamara D. Kerry K. Janes D. Keller J. Feldman W. Prettyman T. Reedy R. Bruckner J. Wanke H. Evans L. Starr R. Squyres S. Karunatillake S. Gasnault O. Compositional Diversity of the Martian Crust: Preliminary Data from the Mars Odyssey Gamma-Ray Spectrometer [#2108] Data are presented on Si, Fe, and K from the Mars Odyssey 2001 Gamma-Ray Spectrometer. The data show that Fe and Si are correlated, but with significant scatter. The regions suggested by Bandfield et al. (2000) to contain andesite is near regions found to be high in Si and K.

Taylor G. J. * Boynton W. Hamara D. Kerry K. Janes D. Keller J. Feldman W. Prettyman T. Reedy R. BrUckner J. Wanke H. Evans L. Starr R. Squyres S. Karunatillake S. Gasnault O. Evolution of the Martian Crust: Evidence from Preliminary Potassium and Thorium Measurements by Mars Odyssey Gamma-Ray Spectrometer [#2004] Global data from the Mars Odyssey GRS show that K and Th are correlated and that their concentrations are higher than in Martian meteorites. This has implications for the compositions of the crust, bulk silicate Mars, and global dust.

Mitrofanov I. G.* Litvak M. L. Kozyrev A. S. Sanin A. B. Tret'yakov V.I. Boynton W. V. Hamara D. K. Shinohara C. Saunders R. S. Drake D. Global Distribution ofShallow Water on Mars: Neutron Mapping of Summer-Time Surface by HEND!Odyssey [#1104] Observations of water ice rich regions of Mars are presented based on data from HEND(Mars Odyssey) for one year of mapping.

Feldman W. C.* Boynton W. V. Prettyman T. H. Kelly N. Maurice S. Mellon M. Growth of C02 Frost Thickness near Chasma Boreale During Northern Winter and Spring [#1854] This abstract reports new data from the Mars Odyssey Neutron Spectrometer about the time and spatial variation of C02 frost deposition near the north pole during northern late winter and spring.

34th LPSC Program ______5 Monday, March 17, 2003 POKING HOLES: TERRESTRIAL IMPACTS 8:30 a.m. Salon C

Chairs: T. Kenkmann B. M.French

Korycansky D. G. * Asphaug E. WardS. N. Impact Tsunami Calculations: Hydrodynamical Simulations vs. Linear Theory [#1195] We compare hydrodynamical simulations of large-amplitude water waves like those generated by an impact into a deep ocean, to the predictions of linear theory. In general, linear theory turns out to be a reasonably accurate guide to the waves' propagation.

Melosh H. J. * Impact-generated Tsunamis: An Over-rated Hazard [#2013] A recently released report on explosion-generated tsunami has cast doubt on some current estimates that suggest that asteroids as small as 100m in diameter pose a serious threat to humanity.

Ivanov B. A.* Melosh H. J. Impacts Do Not Initiate Volcanic Eruptions [#1338] We perform numerical simulations ofthe impact of an asteroid with a diameter of20 km striking at 15 km/s. Even an impact this large is insufficient to raise mantle material above the peridotite solidus due to decompression only.

Lana C.* Gibson R. L. Reimold W. U. Central Uplift Formation in Very Large Impact Structures: Evidence from the Vredefort Dome [#1009] Comprehensive field-based structural mapping of the core of the Vredefort Dome, South Africa, has been undertaken with the aim of elucidating the structural effects related to the formation of the central uplift of the Vredefort Impact Structure.

Kenkmann T. * Wittmann A. Scherler D. Schmitt R. T. Deformation Features of the Cretaceous Units of the ICDP-Chicxulub Drill Core Yax-I [#1368] The Chicxulub Yax-1 drill core penetrated through 600 m of sediments below the impactites. These rocks are predominantly carbonates and sulfates. Layers enriched in organic matter are frequent. The degree of deformation depends on the lithology.

Allen P. J. * StewartS. A. Silverpit: The Morphology of a Terrestrial Multi-Ringed Impact Structure [#1351] The Silverpit impact structure, discovered under the North Sea, is imaged on high resolution 3D seismic data. It is surrounded by an unusual multi-ringed deformation pattern, which is reminiscent of several impacts seen on Europa and Callisto.

Collins G. S. * Turtle E. P. Melosh H. J. Numerical Simulations of Silverpit Crater Collapse [#2115] We simulate the collapse of the recently discovered Silverpit crater using SALES 2 and Tekton. We have tested a proposed model for the formation of Silverpit's peculiar external ring structures.

ShenA. H. Ahrens T. J. * Ni S. Erosion of Planetary Atmosphere Due to Suiface Waves Induced by Giant Impact [#2031] Results from hydrodynamic simulation of atmosphere erosion due to surface waves induced by giant impact were presented. The propagating surface waves can perturb planetary atmosphere sufficiently and contribute to the erosion of the atmosphere.

6 ______34mLPSCProgram Gucsik A. Koeberl C.* Brandstaetter F. Libowitzky E. Reimold W. U. Scanning Electron Microscopy, Cathodoluminescence, and Raman Spectroscopy of Experimentally Shock Metamorphosed Quartzite [#1082] Cathodoluminescence spectrometry and Raman microspectrometry of a series of shocked quartzite samples is discussed. The results show shifts of the CL and Raman properties with shock pressure.

El Goresy A. * Dubrovinsky L. S. Gillet Ph. Mostefaoui S. Graup G. Drakopoulos M. Simionovici A. S. Swamy V. Masaitis V. L. A Novel Cubic, Transparent and Super-Hard Polymorph of Carbon from the Ries and Popigai Craters: Implications to Understanding Dynamic-induced Natural High-Pressure Phase Transitions in the Carbon System [#1016] We report the discovery of a new cubic, transparent and super-hard polymorph of carbon from the Ries and Popigai craters: This phase will have important implications in understanding high-pressure phase transitions in the carbon system.

Osinski G. R. * Spray J. G. Impact Melt Rocks from the Ries Impact Structure, Germany: Preliminary Results of an Analytical SEM Study [#1719] Isolated exposures of reddish, vesicular impact melt rock occur in a zone near the eastern rim of the Ries impact structure. Here, we present the preliminary results of the first detailed analytical study of these lithologies.

Quitte G. Robin E. * Capmas F. Levasseur S. Rocchia R. Birck J. L. Allegre C. J. Carbonaceous or Ordinary Chondrite as the Impactor at the KIT Boundary? Clues from Os, Wand Cr Isotopes [#1615] Each kind of meteorite is characterized by a typical pattern of isotopic signatures. Therefore we combine Os, W and Cr isotopes data to try and define the nature of the impactor that hit the Earth 65 Myrs ago, at the time of the KfT boundary.

Poreda R. J. * Basu A. Becker L. Nicholson C. Ocampo A. Global Evidence for a Permian-Triassic Impact Event [#1490] We will present the global evidence for a Permian-Triassic impact event and re-examine some of the structural data previously presented by Gorter (1996) as well as additional seismic lines and gravity.

34th LPSC Program ______7 Monday, March 17, 2003 THE WRATH OF KHANDRULES 8:30 a.m. Marina Plaza Ballroom

Chairs: D. S. Ebel H. C. Connolly

Ciesla F. J. * Hood L. L. Evaluating Planetesimal Bow Shocks as Possible Sites for Chondrule Formation [#1400] We present detailed simulations for the thermal processing of solids by bow shocks produced by supersonic planetesimals in the solar nebula and compare the results to the thermal evolution inferred for chondrules.

Tsuchiyama A. * Shigeyoshi R. Kawabata T. Nakano T. Uesugi K. Shirono S. Three-Dimensional Structures of Chondrules and Their High-Speed Rotation [#1271] 3-D structures of 20 chondrules obtained by X-ray microtomography strongly suggest that oblate and prolate chondrules were formed by high-speed rotation of 50-350 rps or more. This is consistent with the shock wave model for chondrule formation.

Ebel D. S. * Engler A. Kurat G. Pyroxene Chondrules from Olivine-depleted, Dust-enriched Systems [#2059] Some rapidly quenched pyroxene chondrules have flat REE patterns. Only >70% depletion in a principal component of nebular dust, forsterite, in dust-rich systems, makes opx + liquid, without olivine, thermodynamically stable at P =one millibar.

Kunihiro T. Rubin A. E. McKeegan K. D. Wasson J. T. Initial 26AlPAl Ratios in Carbonaceous Chondrite Chondrules [#2124] We studied the Al-Mg system in one ofthe most primitive carbonaceous chondrites, CO 3.0 Yamato 81020. Here we report a preliminary result.

Varley L. R. * Leshin L.A. Guan Y. Zanda B. Bourot-Denise M. Oxygen Isotopic Composition of Renazzo Chondrule Olivine and Comparison with Extent of Chondrule Melting [#1899] New oxygen isotopic data for Renazzo chondrules, including the first CR chondrule with olivine 160-enrichment similar to CAis, are reported and compared with extent of chondrule melting. The less melted chondrules are on average more 160-rich.

Krot A. N. * Libourel G. Goodrich C. A. Petaev M.l. Killgore M. Silica-rich Igneous Rims Around Magnesian Chondrules in CR Carbonaceous Chondrites: Evidence for Fractional Condensation During Chondrule Formation [#1451] Type I chondrules in CRs are surrounded by silica-rich igneous rims which may have formed by gas-solid condensation of Si02-rich materials onto chondrule surfaces and subsequent incomplete melting, or by direct SiO condensation into chondrule melts.

Libourel G.* Krot A. N. Tissandier L. Evidence for High Temperature Condensation of Moderately-volatile Elements During Chondrule Formation [#1558] A systematic study of the moderate-volatile element distribution in Type I chondrules from unequilibrated ordinary and CR chondrites shows evidences for high temperature processing of chondrules via interactions with a fractionated nebular gas.

Connolly H. C. Jr.* Weisberg M. K. Russ G. R. On the Nature and Origins of FeO-rich Chondrules in CR2 Chondrites: A Preliminary Report [#1770] We present a progress report on the petrology and oxygen isotopic composition ofFeO-rich chondrules from CR chondrites. The objects show wide variation in the ~ 17 0 compared to type I chondrules suggesting multiple sources. The history of type II chondrules appears more complex than type I.

8 ______34th LPSC Program Wasson J. T. * Rubin A. E. High Cooling Rates of Type-II Chondrules: Limited Overgrowths on Phenocrysts Following the Final Melting Event [#2119] Type-II porphyritic chondrules appear to have cooled at rates »1 K/s, much larger than rates inferred from furnace experiments.

Ruzicka A. * Floss C. Relict Forsterite and Igneous Olivine Grains in Chainpur (LL3.5) Chondrules: Major- and Trace-Element Evidence for Vapor-Fractionation and Igneous Partitioning [#1243] SIMS analyses of relict and igneous olivine grains in Chainpur chondrules provide evidence for vapor-fractionation and igneous partitioning during rapid cooling of chondrules.

Engler A. * Kurat G. Sylvester P. J. Trace Element Abundances in Micro-Objects from Tieschitz ( H3.6 ), Krymka ( LL3. I), Bishunpur ( LL3. I) and Mezo-Madaras (L3.7): Implications for Chondrule Formation [#1689] Bulk trace element analyses of nonporphyritic micro-objects from Type 3 ordinary chondrites indicate that condensation of liquids from vapors is a possible chondrule formation process during which metasomatic events probably played an important role.

Kobayashi S. Imai H. Yurimoto H.* An Extreme 160-rich Chondrulefrom Acfer 214 CH Chondrite [#1536] 16 17 18 An extreme 0-rich chondrule of 0 ' 0sMow =-75%o was found from Acfer 214 chondrite. This discovery suggests that chondrule precursors were originally enriched in 160 than CAl precursors.

Grossman J. N. * Brearley A. J. Cryptic Metamorphic Effects in Chondrulesfrom Highly Unequilibrated Ordinary Chondrites: An Insidious Parent-Body Process [#1584] During the early stages of parent-body metamorphism, alkalis enter the mesostasis of chondrules and albite crystallizes. As albite forms, KINa of coexisting glass rises. Even type 3.0 chondrites have been affected by these metamorphic processes.

34th LPSC Program ______9 Monday, March 17, 2003 PLENARY SESSION MASURSKY LECTURE AND DWORNIK A WARD PRESENTATIONS 1:30 p.m. Salon B

Chairs: S. J. Mackwell E. K. Stansbery

Goldreich P. * Kuiper Belt Binaries: A New Window on Runaway Accretion

Presentation of the 2002 GSA Stephen E. Dwomik U.S. Citizen Student Award Winners

10 34th LPSC Program Monday, March 17, 2003 SPACE WEATHER ON AIRLESS BODIES: OBSERVATIONS, EFFECTS, AND DEPTHS 2:15p.m. Salon A

Chairs: D. T. Blewett J. S. Delaney

Blewett D. T. * Warell J. New Ground-based Spectral Observations of Mercury and Comparison with the Moon [#1155] New observations of Mercury and lunar locations were collected near-simultaneously. A Mercury spectrum (400-970 nm) calibrated to standard geometry was constructed. This spectrum permits analysis with abundance relations for Fe and Ti.

NobleS. K. * Pieters C. M. Keller L. P. The Optical Properties of Nanophase Iron: Investigation of a Space Weathering Analog [#1172] We have created a space weathering analog by impregnating silica gel powders with nanophase iron to investigate the optical properties. We find that the Vis/NIR spectra change systematically with the size and concentration of iron.

Basu A. * McKay D. S. Wentworth S. J. A Critical Examination of Relative Concentrations of Volume-correlated and Surface-correlated Submicron Globules of Pure Fe 0 in Lunar Soils [#1159] In lunar soils most of nanophase iron currently resides in agglutinitic glass.

Kareev M. S. * Sears D. W. G. Benoit P. H. Atabaev B. G. The Importance of Solar Wind in the Production of "Space Weathering" Features on the Moon and on Asteroids [#1110] Results support the idea that layered inclusions of npFe in the rims of regolith grains could be created or transformed by solar wind irradiation and charging, and thereby provides new insights on exposure by solar wind of the surface of asteroids.

Hendrix A. R. * Vilas F. Space Weathering: An Ultraviolet Indicator [#1856] We present spectra of lunar samples, the Moon, Vesta and other asteroids, which are used as evidence suggesting that the spectral slope of air less bodies in the UV-visible wavelength range can be used as an indicator of exposure to space weathering.

Anand M. * Taylor L. A. Nazarov M. A. Shu J. Mao H-K. Remley R. J. New Lunar Mineral HAPKEITE*: Product of Impact-Induced Vapor-Phase Deposition in the Regolith? [#1818] We report here the results of in situ single-crystal study of a new lunar mineral phase, Hapkeite, and discuss its possible origin on the Moon and its significance for the overall process of space weathering.

Delaney J. S. * Dyar M.D. Htirz F. Johnson J. R. Evidence for Coordination and Redox Changes of Iron in Shocked Feldspar from Synchrotron MicroXANES [#1417] Synchrotron microXANES measurements of trace Fe in experimentally shocked feldspar reveal systematic changes of both oxidation state and coordination as a function of maximum shock pressure.

34th LPSC Program ______11 Dikov Yu. P. Gerasimov M. V. * Yakovlev O. I. Wlotzka F. Ruth J. The Behavior of Ni in Silicate Melts During Impact-simulated High-Temperature Heating [#1574] Impact-related heating produces condensates depleted in Mg and Si but highly emiched in Ni which is present as: metallic; oxide; and silicate type. The behavior of Ni agrees with the observed Ni budget of lunar regolith fine fraction and impact glasses.

Wilcox B. B. * Robinson M.S. Lucey P. G. Thomas P. C. Hawke B. R. Constraints on the Depth and Variability of the Lunar Regolith [#1877] We find that the depth of the regolith in mare regions in highly variable and commonly up to 25 m.

12 ______.34th LPSC Program Monday, March 17, 2003 MARS VOLCANISM 2:15p.m. Salon B

Chairs: J. R. Zimbelman W. L. Jaeger

Ori G. G. * Karna A. The Uppermost Crust of Mars and Flood Basalts [#1539] In recent years, the images of the camera of Mars Global Surveyor have shown that the upper part of the crust is extensively layered. These beds are remarkably exposed in the walls of Valles Marineris, but occur also extensively all over the planet.

Zimbelman J. R. * Peitersen M. N. Christensen P.R. Rice J. W. Application ofTHEMIS Data to an Investigation of a Long Lava Flow in the Tharsis Montes Region of Mars [#1387] THEMIS daytime IR and VIS images of a long lava flow west of Ascraeus Mons reveal new details not evident from earlier data. The low thermal inertia for this region provides a uniform covering that enhances detectability of subtle topographic effects at both visual and thermal wavelengths.

Sakimoto S. E. H. * Gregg T. K. P. Hughes S. S. Chadwick J. Martian Plains Volcanism in Syria Planum and Tempe Mareotis as Analogs to the Eastern Snake River Plains, Idaho: Similarities and Possible Petrologic Contributions to Topography [#1740] We compare martian volcanic shield topographic characteristics to topography of a similar range of shield features in the Eastern Snake River Plains of Idaho, where compositional variations are known to contribute to petrologic and topographic differences.

McGovern P. J. * Smith J. R. Morgan J. K. Bulmer M. Olympus Mons Aureole Deposits and Basal Scarp: Structural Characteristics and Implications for Flank Failure Scenarios [#2080] We examine the structure of the Olympus Mons basal scarp and aureole in order to evaluate flank failure scenarios. We apply insights from reconstructions of pre-failure geometry and numerical modeling of slope failure dynamics, inspired by Hawaiian analogues.

Chase Z. A. J. * Sakimoto S. E. H. Thermal Modeling of Permafrost Melt by Overlying Lava Flows with Applications to Flow-Associated Outflow Channel Volumes in the Cerberus Plains, Mars [#1905] Heat from observed lava flow thicknesses near an E. Cerberus region vent is modeled to determine if thermal pulses into the substrate can melt pore space ice sufficient to fill local small spatially related fluvial channel networks.

Mitchell K. L. * Wilson L. Head J. W.III Dike Emplacement as a Mechanism for Generation of Massive Water Floods at Cerberus Fossae, Mars [#1332] We model the release of the Athabasca Valles floodwater, getting results consistent with the morphology and topography of the Cerberus Fossae source. However, we have difficulty reconciling Burr et al.'s water volume fluxes with Darcy-type flow.

Jaeger W. L. * Keszthelyi L. P. Burr D. M. McEwen A. S. Baker V. R. Miyamoto H. Beyer R. A. Ring Dike Structures in the Channeled Scabland as Analogs for Circular Features in Athabasca Valles, Mars [#2045] Circular features in Athabasca Valles, Mars are similar in size, shape and geologic setting to ring dike structures in the Channeled Scabland. We examined three ring dikes near Odessa, W A. We present those data and discuss hypotheses for their formation.

34th LPSC Program ______13 Baloga S. M. * Glaze L. S. Crown D. A. Scaling of Pahoehoe Flow Field Features [#1437] Pahoehoe flow fields contain many different features with lengths that are lognormally distributed, indicating transitions between styles of emplacement. We consider a pahoehoe flow field to be a mixture of features that can be combined. The mixture takes on a new character that is logistic.

Lipkaman L. J. * Gregg T. K. P. A 'a Versus Pahoehoe on Mars, Venus, and Earth: What Do Fractal Dimensions Actually Reveal? [#1389] The use of fractal dimensions does not have the planetary application once thought. Fractal dimensions of lava-flow margins indicate emplacement style, not surface morphology. Furthermore, fractal behavior of flow margins breaks down at large scales.

14 ______34th LPSC Program Monday, March 17, 2003 SPECIAL SESSION CHICXULUB SCIENTIFIC DRILLING PROJECT 2:15p.m. Salon C

Chairs: D. A. Kring V. L. Sharpton

Urrutia-Fucugauchi J. * Vera-Sanchez P. Soler-Arechalde A.M. Marton-Bermea O. Reyes-Salas M. Lozano-Santamaria R. Linares-Lopez C. Rebolledo-Vieyra M. On the Nature of Chicxulub Impactor [#2132] The Chicxulub crater is considered the impact site for the K/T global ejecta layer. We report studies of the breccia sequence cored in the UNAM and Yaxcopoil-1 boreholes. Our findings provide a unique opportunity to investigate on the Chicxulub impactor.

Dressler B. O. * Sharpton V. L. Marin L. E. Chicxulub YAX-1 Impact Breccias: Whence They Come? [#1259] Six units of Y AX-1 impact breccias are tentatively interpreted, from top (795 m) to bottom (895 m), as (1) redeposited suevite, (2) suevite, (3/4) a "nuee ardente/ash-flow" -like deposit, (5) a fragmented melt rock (melt breccia), and (6) a carbonate melt-rich breccia.

St6ffler D. * Hecht L. Kenkrnann T. Schmitt R. T. Wittmann A. Properties, Classification, and Genetic Interpretation of the Allochthonous Impact Formations of the ICDP Chicxulub Drill Core YAX-1 [#1553] The Chicxulub drill core exposes 100m of suevite-type breccias consisting of six layered units. The upper four layers are interpreted as ballistic "fall out" suevite and the lower two units may represent ground surged and laterally transported polymict, melt-rich clastic material.

Kring D. A.* Horz F. Zurcher L. Initial Assessment of the Excavation and Deposition of Impact Lithologies Exposed by the Chicxulub Scientific Drilling Project, Yaxcopoil, Mexico [#1641] The Chicxulub Scientific Drilling Project recovered a series of melt-rich impactites unlike those from any other terrestrial crater.

Tuchscherer M.G.* Reimold W. U. Gibson R. L. Koeberl C. Petrographic Observations and Classification: Impactitesfrom the Yaxcopoil-1 Borehole, Chicxulub Impact Structure, Yucatan Peninsula, Mexico [#1310] First petrographic results from impactites of the Yaxcopiol-1 ICDP drill core are presented and discussed in terms of subdivision and classification.

Tagle R. * Erzinger J. Hecht L. Stoeffler D. Schmitt R. T Claeys P. Platinum Group Elements Analysis ofimpactitesfrom the ICDP Chicxulub Drill Core Yax-1: Are There Traces of the Impactor? [#1811] PGE in the impactites from the Chicxulub cores Yax-1 and Y6, show a terrestrial pattern and no meteoritic contamination. This supports a non-homogeneous distribution of impactor material between crater fill and the distal impact formations.

Gilmour I.* Sephton M.A. Morgan J. V. Organic Geochemistry of a Hydrocarbon-rich Calcarenite from the Chicxulub Scientific Drilling Program [#1771] The organic geochemistry of hydrocarbon-rich core material recovered by the CSDP is examined to establish whether hydrocarbons are associated with the migration and emplacement of organic matter by post-impact hydrothermal activity.

34th LPSC Program ______15 Zurcher L. * Kring D. A. Dettman D. Rollog M. Stable Isotope Record of Post-impact Fluid Activity in the Chicxulub Crater as Exposed by the Yaxcopoil-1 Borehole [#1728] Stable isotope measurements of new core samples from the Chicxulub impact crater constrain post-impact fluid activity.

O'Keefe J. * Ahrens T. J. Basin Forming Impacts: Heterogeneity as a Unifying Construct [#2083] We have new modelling results for Chicxulub crater that reproduces the major features including inverted stratigraphy, peak rings, terracing, Moho penetrating faults, and melt layering.

16 ______34th LPSC Program Monday, March 17, 2003 NUCLEOSYNTHESIS 2:15p.m. Marina Plaza Ballroom

Chairs: M. Gounelle E.D.Young

Gounelle M. * Shang S. Glassgold A. E. Shu F. H. Rehm E. K. Lee T. Early Solar System Irradiation and Beryllium-7 Synthesis [#1833] In the framework of the x-wind model, we have calculated the yields of the extinct short-lived 7Be (T =53 days) produced via irradiation by protoSolar Energetic Particles. 7Be- and other radionuclides- yields are compatible with initial abundances inferred from meteorites.

Marhas K. K. * Goswami J. N. Be-B Isotope Systematics in CV and CM Hibonites: Implications for Solar Energetic Particle Production of Short-lived Nuclides in Early Solar System [#1303] Presence of radiogenic 10B in HAL hibonite with extremely low initial 26 AU27 AI ratio of -5 x 10-8 and in CM hibonites devoid of radiogenic 26Mg conclusively establish that the source of 10Be present in early solar system did not contribute significant amount of 26 AI, 41 Ca and 53Mn.

Robert F. * Chaussidon M. Boron and Lithium Isotopic Composition in Chondrulesfrom the Mokoia Meteorite [#1344] The lithium and boron isotopic compositions in the chondrules of the Mokoia meteorite has been determined with the ion microprobe. The results confirm the high heterogeneity of solar system Li and B.

Young E. D.* Lyons J. R. CO Self Shielding in the Outer Solar Nebula: An Astrochemical Explanation for the Oxygen Isotope Slope-] Line [#1923] Calculations show that photodissociation of CO by stellar EUV light high above the midplane in the early solar nebula is an attractive and plausible explanation for the oxygen isotope slope-lline.

Nuth J. A. III* Ferguson F. T. Johnson N. Martinez D. Initial Measurement of the Vapor Pressures of Simple Refractory Materials: Cu and Fe [#1598] Using copper as a standard, we are learning to measure vapor pressures in vacuo at temperatures to 1975K using a Thermogravimetric system. Preliminary measurements of iron indicate that its true vapor pressure is a factor 5 lower than the currently accepted values for the range from 1500K to 2000K.

Dauphas N. * Rouxel O. Davis A.M. Lewis R. S. Wadhwa M. Marty B. Reisberg L. Janney P. E. Zimmermann C. Iron and Selenium Isotope Homogeneity in the Protosolar Nebula? [#1807] The isotopic compositions of iron and selenium in leachates of carbonaceous chondrites is apparently homogeneous.

Tachibana S. * Huss G. R. Iron-60 in Troilitesfrom an Unequilibrated Ordinary Chondrite and the Initial 6°Fe/56Fe in the Early Solar System [#1737] Evidence of existence of 60pe was found by ion microprobe as excess of radiogenic 60Ni in troilites from an unequilibrated 56 7 7 ordinary chondrite, Bishunpur. The estimated initial 60pef Fe ratio in the solar system ranges from 1.1 X 10- to 3.5 X 10- .

34th LPSC Program ______17 Mostefaoui S. * Lugmair G. W. Hoppe P. El Goresy A. Evidence for Live Iron-60 in Semarkona and Chervony Kut: A NanoSIMS Study [#1585] We present an in situ NanoSIMS study of the Fe-Ni system in iron sulfides in the Chervony Kut (CK) eucrite and in the Semarkona (LL3.0) ordinary chondrite. Evidence for live 60pe is found in both meteorites, with an extreme 60Ni excess in CK.

Meyer B. S. * Clayton D. D. The L.-S. El Eid M. F. Injection of182Hfinto the Early Solar Nebula [#2074] If 41 Ca is injected into the early solar nebula by a nearby supernova, it is likely accompanied by enough 182Hfto explain the amount inferred to have been present in the early solar system. In such a case, the 182Hf is not due to the r-process but rather to nucleosynthesis in massive star shells.

l8 ______~34th LPSC Program Tuesday, March 18, 2003 MOVING AND GROOVING ICE 8:30 a.m. Salon A

Chairs: F. Nimmo A. P. Showman

Showman A P. * Han L. Numerical Simulations of Convection in Europa's Ice Shell: Implications for Surface Features [#1806] Numerical simulations of convection in Europa's ice shell show that 100-200 m-amplitude topography results from the convection under reasonable conditions. This may help explain some, though not all, of the numerous pits, uplifts, and spots seen on Europa's surface.

Barr A C.* Pappalardo R. T. Numerical Simulations of Non-Newtonian Convection in Ice: Application to Europa [#1477] We present results of numerical simulations of solid-state convection using a non-newtonian rheology for ice. Implications for the interior structure of Europa are discussed.

Goodman J. C. * Collins G. C. Marshall J. Pierrehumbert R. T. Dynamics of Hydrothermal Plumes on Europa: Implications for Chaos Formation [#1834] We compute scaling laws which govern the dimensions of hydrothermal plumes in Europa's liquid layer. These laws lead to predictions of plume size, heat flux, and velocity which aid discussion of chaos formation mechanisms.

Figueredo P. H. * Greeley R. The Emerging Resurfacing History of Europa from Pole-to-Pole Geologic Mapping [#1017] Results from regional geologic mapping show gradual changes in the styles of cryovolcanic and tectonic mechanisms over the visible geologic history. These changes appear to reflect the effects of tidal and thermal processes on a thickening ice shell.

Bart G. D. * Greenberg R. Hoppa G. V. Cycloids and Wedges: Global Patterns from Tidal Stress on Europa [#1396] Variations in diurnal tensile stress result in both cycloids and boxy-to-circular crack features. The latter follow very tightly curved paths that are similar in size, shape, and location to the crack patterns in the wedges and sub-jovian regions.

Sarid A R. * Greenberg R. Geissler P. Hoppa G. V. Crack Azimuth Sequences on Europa: The Southern Leading Hemisphere [#1445] Cross-cutting relationships among tectonic lineaments in the southern leading hemisphere of Europa yield systematic changes in azimuth suggestive of tidal stress changes over several cycles of non-synchronous rotation.

Greenberg R. * Hurford T. The Evil Twin ofAgenor: More Evidence for Tectonic Convergence on Europa [#1861] Reconstruction along a lineament similar to Agenor, but located diametrically opposite, indicates it is a convergence site, confirming hypotheses that similar features elsewhere formed that way and helping solve the surface-area budget problem.

Nimmo F.* Giese B. Pappalardo R. T. Estimates of Europa's Ice Shell Thickness from Elastically-supported Topography [#1296] Flexural topographic profiles near Cilix crater, Europa, give an elastic thickness of 6( +5,-2)krn. Based on this value, the total ice shell thickness must exceed 6 krn, and is probably -25 krn.

34th LPSC Program ______19 Pappalardo R. T. * Collins G. C. Head J. W. Moore J. M. Schenk P.M. Grooved Terrain on Ganymede: A Galileo-based Synthesis [#1509] Galileo imaging has greatly improved understanding of the emplacement history and geological implications of grooved terrain, supporting a rift-like model, with important modifications from previous scenarios.

Hibbitts C. A. * Hansen G. B. McCord T. B. Stephan K. Impactor Contamination of Dark Ray Craters on Ganymede [#1925] Spectra from the Near Infrared Mapping Spectrometer aboard Galileo of dark ray material from the Kittu impact crater on Ganymede show evidence of contamination by a C-type impactor. Spectra from areas unaffected by dark ray craters conform to a mixture of waterice and Ganymede no nice material.

Stephan K. * Jaumann R. Wagner R. Hibbitts C. A. Hansen G. B. Ganymede Craters: Relationships Between Spectral Properties and Crater Retention Age [#1687] The amount of water ice in bright impact craters and the amount of non-ice contaminant(s) within crater material and ejecta of dark ray craters observed by NIMS and SSI on Ganymede is assumed to be indicative of relative crater retention age.

Zahnle K. * Schenk P. Dones L. Levison H. Crate ring Rates in the Outer Solar System [#1522] We assess the sizes and numbers of the comets, and discuss impact rates by comets and asteroids on planets and satellites throughout the outer solar system. We do some other stuff too, but you can read about that in the abstract.

Makris N.C.* LeeS. Zanolin M. Pappalardo R. T. Probing Europa's Interior with Natural Sound Sources [#1449] Our goal is to use acoustic echo-sounding and tomographic techniques to determine Europa's interior structure. We show that robust estimates can be made of Europa's ice layering structure and potential ocean depth with a single acoustic sensor.

20 ______~34th LPSC Program Tuesday, March 18, 2003 MARS SURFACE COMPOSITION FROM INFRARED SPECTROSCOPY 8:30 a.m. Salon B

Chairs: H. Y. McSween J. L. Bishop

Gendrin A.* Erard S. A New Tool to Investigate Infrared Spectra, Based on Wavelet Filtering. Application to Hawaii [#1376] A method to analyze imaging spectrometry data is presented. It permits automated detection and characterization of spectral features in large data sets. Its capabilities are assessed on an AVIRIS image cube acquired over the Hawaii volcanoes.

Poulet F.* Erard S. Mangold N. The Surface Composition of Martian Low Albedo Regions Revisited [#1691] The purpose of this work is to revisit the surface composition of dark regions by modeling ISM spectra representative of dark regions with a radiative transfer theory.

Steutel D.* Lucey P. G. Hamilton V. E. A Reinterpretation of ISM Data: Quantitative Analysis of Pyroxene Compositions [#1898] We have developed a quantitative model for determining pyroxene composition from 1- and 2-1-lm band center locations. This model is applied to previously identified band centers in ISM spectra.

McSween H. Y. Jr.* Grove T. L. Wyatt M. B. Basalt Versus Andesite in the Martian Crust: New Geochemical Perspectives [#1189] Chemical compositions derived from deconvoled MGSffES data for Mars surface types 1 and 2 constrain the materials that form the ancient crust and the processes that produced them.

Glotch T. D.* Morris R. V. Sharp T. G. Christensen P.R. Characterization of the Effects of Precursor Mineralogy on Hematite Spectra: Application to Martian Hematite Mineralization [#2008] Infrared spectra of the magnetite-precursor hematite samples were poor spectral fits for martian crystalline hematite spectra, while goethite-derived samples provided good fits. Data suggest that martian crystalline hematite could not have formed by the thermal oxidation of magnetite.

Kirkland L. E.* Herr K. C. Adams P.M. Salisbury J. W. Hematite Coatings Match TES Spectra of Sinus Meridiani, Mars [#1944] The hematite coating option is important because (1) hematite coatings can require little water to form, interrupting "hematite signature = abundant water" conclusions; and (2) researchers need to prepare for possible measurement by the 2003 rover.

Bandfield J. L. * Glotch T. D. Christensen P.R. Spectroscopic Identification of Carbonates in the Martian Dust [#1723] The spectral signature of surface dust isolated from the MGS-TES instrument indicates that a small amount of carbonate is present within a fine-particulate silicate matrix.

Seelos F. P. IV* Arvidson R. E. Bounded Variable Least Squares -Application of a Constrained Optimization Algorithm to the Analysis of TES Emissivity Spectra [#1817] A Bounded Variable Least Squares (BVLS) constrained optimization algorithm is applied to the analysis ofTES emissivity spectra. The algorithm imposes parameter constraints without requiring the ejection of end-member spectra from consideration.

34th LPSC Program ______21 Kraft M.D. * Sharp T. G. Michalski J. R. Thermal Emission Spectra of Silica-coated Basalt and Considerations for Martian Surface Mineralogy [#1420] The composition of Martian dark regions has been interpreted as basalt plus andesite or altered basalt. Some "andesite" surfaces may be the result of coatings of secondary silica on basalt. We present laboratory spectra of silica-coated basalt.

Anderson F. S. * Hamilton V. E. Christensen P.R. Mineralogy of the Valles Marineris: Initial Stratigraphic Results from Comparing TES Endmember Compositions with MOLA [#2022] This study tests the proposition that data from the MGS TES and MOLA can be used to identify stratigraphic and mineralogic layering in the wall and floor deposits of the Valles Marineris (VM).

WrightS. P. * Ramsey M. S. Spaceborne Thermal Infrared Data Analysis of Meteor Crater, Arizona: Analog for THEM IS Data of a Small Impact Crater in Syrtis Major [#1495] Spaceborne thermal infrared (TIR) data is deconvolved to map the Meteor Crater ejecta lithologies using image endmembers and sample endmembers. An image end member analysis is performed for a fresh, small impact site in Syrtis Major for insight into ejecta composition and other crater properties.

RuffS. W. * Christensen P.R. Identifying Compositional Heterogeneity in Mars' Nili Patera Caldera Using THEMIS and TES Data [#2068] The combination of THEMIS and TES data from Nili Patera caldera provide compositional and spatial information that can be used to interpret its volcanic history.

Morris R. V. * GraffT. G. Mertzman S. A. Lane M.D. Christensen P.R. Palagonitic Mars from Rock Rinds to Dust: Evidence from Visible, Near-IR, and Thermal Emission Spectra of Poorly Crystalline Materials [#1874] Palagonitic alteration rinds developed on basaltic rocks are spectral endmembers that provide a consistent explanation for both VNIR and TES data of Martian dark regions.

22 ______~34th LPSC Program Tuesday, March 18, 2003 DIGGING DEEPER: IMPACT EXPERIMENTS AND THEORY 8:30 a.m. Salon C

Chairs: O. S. Barnouin-Jha S. T. Stewart

Hausen K. R. * Material Motions and Ejection Velocities for Impacts in Porous Targets [#1300] Experiments were conducted using a quarter-space fixture to observe the cratering flow field during impact events in porous target materials. The experiments show that the craters form mostly by compaction, in contrast to the usual excavation observed in materials with low porosity.

Schultz P. H. * Transient Crater Growth in Low Density Targets [#2067] Hypervelocity impacts into low-density targets produce deep transient craters and evolve non-proportionally. Cratering efficiency also increases with decreasing impact angle, in contrast with typical gravity-controlled cratering.

Yamamoto S. * Kadono T. Sugita S. Matsui T. Measurements of Ejecta Velocity Distribution from Regolith Targets in Oblique Impacts [#1272] We performed impact experiments on sand targets for various impact angles, in order to measure the ejecta velocity distribution of high-velocity ejecta component from regolith targets for oblique impacts.

Colwell J. E. * Sture S. Experimental Studies of Low-Velocity Micro gravity Impacts into Regolith [#1904] We describe impact experiments into simulated planetary regolith at speeds below 2.5 m/s in microgravity conditions. We measure coefficient of restitution, ejecta velocities, and ejecta masses as a function of a variety of impact parameters.

Richardson J. E.* Melosh H. J. Greenberg R. An Impact Ejecta Behavior Model for Small, Irregular Bodies [#1241] A dynamical simulator is described which models the ejecta plume behavior, ejecta blanket placement, and impact crater area resulting from a specified impact on an irregularly shaped target body (modeled in three-dimensional polygon fashion).

HartS. D.* Asphaug E. Durda D. D. Flynn G. J. Modeling Asteroid Impact Dynamics: Catastrophic Disruption of Three Distinct Structure Types [#2064] This paper reports the outcome of high-speed collisional experiments in three distinct structure types. The results illustrate the importance of structure type in the outcome of catastrophic disruption impact events.

Sugita S. * Kadono T. Ohno S. Hamano K. Matsui T. Does Laser Ablation Vapor Simulate Impact Vapor? [#1573] Many laser experiments have been done to simulate hypervelocity impact vaporization. However, few quantitative comparisons have been made between the two kinds of vapor. This study quantitatively assesses the validity of laser simulation of impact.

Eberhardy C. A. * Schultz P. H. Looking Inside the Early-Time Radiation Plume for Hypervelocity Impacts [#2039] Testing of a new experimental method to measure spectroscopically the vapor plume contained inside transient crater cavities.

34th LPSC Program ______23 Hamano K. * Sugita S. Kadono T. Matsui T. A New Method to Measure the Pressure of Impact-Induced Vapor Clouds [#1647] Impact vaporization is thought to have played an important role in the evolution of planetary atmospheres. However, little has been understood about impact-induced vapor clouds. The purpose of this study is to measure pressure of the vapor clouds.

Ernst C. M. * Schultz P. H. Effect of Initial Conditions on Impact Flash Decay [#2020] Impact flash decay is shown to depend on target properties and may provide a useful new remote sensing tool for active planetary missions.

Siret D.* Robin E. Spinel Formation in an Impact Plume: A Thermodynamic Approach [#1865] Thermodynamic modeling is used to determine the condensation sequence that occur in plume generated by meteorite impact and to study the formation of Ni-rich spinel.

StewartS. T. * Ahrens T. J. Hugoniots and Shock-Melting Criteria for Solid and Porous H20 Ice [#1622] Shock wave measurements in solid and porous H20 ice between 100 and 150 K detail complicated low-pressure behavior and define new Hugoniots and critical shock pressures for shock-induced melting during impact cratering events.

24 ______.34th LPSC Program Tuesday, March 18, 2003 CARBONACEOUS CHONDRITES: TALES FROM THE DARK SIDE 8:30 a.m. Marina Plaza Ballroom

Chairs: M. K. Weisberg J. M. Friedrich

Pravdivtseva O. V. * Hohenberg C. M. Meshik A. P. The I-Xe Age ofOrgueil Magnetite: New Results [#1863] New studies of two pure separates of Orgueil magnetite confirm the younger 1-Xe age 4.568 Ga rather than the previously reported and anomalously old age 4.573 Ga.

Hua X.* Huss G. R. Tachibana S. Sharp T. G. Oxygen Isotopic Compositions of Fayalite in the Kaba CV3 Carbonaceous Chondrite [#1702] 0-isotopic compositions of fayalite were measured in two objects of the oxidized Kaba carbonaceous chondrite. All fayalite data fall on the TF line. Compositions of nearby forsterites scatter around the CCAM line; their 8170 values range from -6.03 to -2.37%o.

Cosarinsky M. * Leshin L.A. MacPherson G. J. Krot A. N. Guan Y. Oxygen Isotopic Compostion of Ca-Fe-rich Silicates in and Around an Allende Ca-Al-rich Inclusion [#1043] Allende Ca-Fe-rich silicates have a variable oxygen isotopic composition along a mass fractionation trend, slightly below the TFL. Their occurrence, texture, mineralogic and isotopic composition are better explained by formation in a parent body setting.

Shimoda G.* Nakamura N. Kimura M. Nohda S. Yamamoto K. 4.4 Ga Alteration of Chondrules in Allende ( CV3) Parent Body: Evidence from the Rb-Sr System [#1597] To evaluate the alteration process in CV parent body, Sr isotopic compositions are determined for the eighteen chondrules from the Allende chondrite. We present three components mixing to explain Rb-Sr system of the chondrules.

Abreu N. M. * Brearley A. J. HRTEM and EFTEM Observations of Matrix in the Oxidized CV3 Chondrite ALH 84028: Implications for the Origins of Matrix Olivines [#1397] TEM and EFTEM studies of matrix olivines in ALH 84028 show they contain inclusions of pentlandite, chrornite and poorly graphitized carbon. Voids are also common. An origin by dehydration of precursor phyllosilicates seems most probable.

Weisberg M. K. * Connolly H. C. Jr. Ebel D. S. Amoeboid Olivine Aggregates in CR Chondrites [#1513] AOAs in CR chondrites are irregular-shaped objects consisting of olivine surrounding refractory-rich minerals. They had a complex history that included nebular gas-solid condensation, reaction of mineral phases with the nebular gas, followed by sintering/coarsening of the assemblage.

Schoenbeck T. W. * Palme H. Silicon Concentrations in Metal Grains of CB-, CH-and CR-Chondrites -Implications for Their Formation [#1605] New EMP analyses of metals inCH- and CR-chondrites are presented. Most metals have less than 70 ppm Si, only some CR- metals are higher. Calculations show that it is not possible to define the origin of CC-metal on the basis of Si in metal.

Hezel D. C. * Brenker F. E. Palme H. Evidence for Fractional Condensation and Flash Reheating from Volatile Rich Objects inCH-Chondrites [#1595] CH-chondrites are strongly depleted in volatiles. Two volatile rich chondrules with bulk MnO up to 2.59 wt% were found, supporting the hypothesis that some CH-components formed during fractional condensation and were subsequently reheated to > 1968 K.

34th LPSC Program ______25 Campbell A. J. * Humayun M. Zoned and Unzoned Metal Grains in the CH Chondrites ALH 85085 and PCA 91467 [#1410] Trace siderophile element profiles were measured in Ni-zoned and Ni-unzoned metal grains in two CH chondrites. Implications regarding the formation of this metal are discussed.

Righter K. * Campbell A. J. Humayun M. Diffusion of Siderophile Elements in Fe Metal: Application to Zoned Metal Grains in Chondrites [#1373] Diffusion coefficients have been measured for siderophile elements in Fe metal between 1150° and 1400°C. These new results are applicable to a range of problems in meteoritics. We discuss application to zoned metal grains in metal-rich chondrites.

Friedrich J. M. * Wolf S. F. Voss H.-P. Tagish Lake: Bulk Chemistry and Terrestrial Alteration [#1562] We discuss relationships among major, minor, and trace elements within Tagish Lake and among other carbonaceous chondrites. Additionally, we discuss the significant effects of terrestrial alteration exhibited by Tagish Lake samples gathered from ice and snow.

Garvie L. A. J. * Buseck P.R. Sulfur-rich Carbonaceous Nanoglobules in the Tagish Lake Meteorite [#2014] Electron energy-loss spectroscopy (EELS) with transmission electron microscopy (TEM) is used to reveal the chemistry of carbonaceous nanoglobules in the Tagish Lake meteorite. The nanoglobules areS-rich with minor Nand O.

Nakamura K. * Nakashima S. Shiota D. Zolensky M. E. Keller L. P. In Situ Heating Behavior by Infrared Microspectroscopy of Organic Components in Tagish Lake Meteorite [#1432] We report the rnicro-FTIR analysis ofTagish Lake containing the hollow organic globules and the step heating experiments, suggesting Tagish Lake may have never experienced higher than l20°C after the formation of membrane-like hollow organic globules.

26 ______34mLPSCProgram Tuesday, March 18, 2003 LUNAR SCIENCE: REGIONAL, SAMPLE, GEOIDAL 1:30 p.m. Salon A

Chairs: B. R. Hawke C. R. Neal

Poitrasson F. * Halliday A. N. Lee D. C. Levasseur S. Teutsch N. Iron Isotope Evidence for Fonnation of the Moon Through Partial Vaporisation [#1433] The isotopic composition of iron in lunar samples is heavy relative to the Earth, which is itself heavier than meteorites from Mars and Vesta. This may be the imprint of planetary partial vaporisation during the Giant Impact that led to the formation of the Moon.

Warren P. H. * Humphrys T. L. Bulk Composition ofthe Moon as Constrained by Thorium Data: Comparison of Lunar Prospector Versus Apollo GRS Results [#2034] We integrated Lunar Prospector-GRS data, as calibrated by Lawrence eta!. [2000], for 38 regions defined by the Apollo GRS team. ForTh-poor (farside +limb) highland regions, the LP-GRS Th calibration is systematically higher by 0.88 ± 0.11 p.g/g.

Lucey P. G.* Steutel D. Global Mineral Maps of the Moon [#1051] Using a Hapke-based spectral analysis model and Clementine UVVIS data, we have produced global mineral maps of the Moon.

Hawke B. R. * Blewett D. T. Bussey D. B. J. Giguere T. A. Lawrence D. J. Lucey P. G. Smith G. A. Spudis P. D. Taylor G. J. Geochemical Anomalies in the Lunar Highlands [#1198] Lunar Prospector elemental abundance data were used to identify and investigate geochemical anomalies in the lunar highlands. Five mafic anomalies were found to correspond to cryptomare deposits.

Zeigler R. A. * Haskin L. A. Korotev R. L. Jolliff B. L. Gillis J. J. The Apollo I6 Mare Component: Petrography, Geochemistry, and Provenance [#1454] We present the petrography and geochemistry of five new Apollo 16 mare basalt fragments and discuss the likely provenances (through lateral post-basin mixing) of all mare basalts found at the Apollo 16 site using Clementine-derived global Ti02 and FeO.

Zellner N. E. B. * Spudis P. D. Delano J. W. Whittet D. C. B. Swindle T. D. Geochemistry and Impact History at the Apollo 16 Landing Site [#1157] Impact glasses from the Apollo 16landing site have been geochemically analyzed and compared to Clementine orbital data. A subset of these glasses has been dated and is used to interpret the lunar impact history at the Apollo 16landing site.

Hagerty J. J. * Shearer C. K. Papike J. J. Trace Element Characteristics ofMinerals in the Apollo 14 High-A[ Basalts: Implications for an Igneous Versus an Impact Origin [#1773] SIMS analyses of trace elements in plagioclase and olivine grains from the Apollo 14 high-Al basalts have shown that these basaltic fragments were not produced as a result of impact melting.

James O. B. * Cohen B. A. Taylor L. A. Lunar Meteorite Dhofar 026: A Shocked Granulitic Breccia, Not an Impact Melt [#1149] Detailed study of the texture ofDhofar 026, and comparison to textures of Apollo samples 15418 and 60017, indicate that Dhofar 026 is a shocked granulitic breccia in which post-shock temperature was well above the solidus and extensive partial melting took place.

34th LPSC Program ______27 Korotev R. L. * Jolliff B. L. Zeigler R. A. Haskin L.A. Compositional Evidence for Launch Pairing of the YQ and Elephant Moraine Lunar Meteorites [#1357] We show that there is no compositional impediment to the hypothesis that the YQ lunar meteorites, Yamato 793274/981031 and QUE 94281, are launch paired with EET 87521196008. EET is heterogeneous because it is a breccia derived from a differentiated magma body.

Takeda H.* Saiki K. Ishii T. Otsuki M. Mineralogy of the Dhofar 489 Lunar Meteorite, Crystalline Matrix Breccia with Magnesian Anorthositic Clasts [#1284] Dhofar 489, a crystalline matrix feldspathic breccia gives the mg# of mafic silicates higher than those ofFAN trend in the An vs. mg# diagram, but D489 does not show granulitic texture. We examine the origin of this magnesian anorthosite.

Liang Y. * Hess P. C. Cherniak D. J. Decoupling of REE in Plagioclase and Orthopyroxene in the Lunar Ferroan Anorthosite [#2006] Due to their large differences in the diffusion rates, REE in the plagioclase and orthopyroxene can be significantly decoupled during lunar magmatic processes.

Wieczorek M. A. * The Thickness of the Lunar Crust: How Low Can You Go? [#1330] Recent analyses of the Apollo seismic data suggest that the crust is significantly thinner ( -30 to 40 km) than originally suggested ( -60 km). It is shown that crustal thickness inversions and GTRs are consistent with these new seismic constraints.

Neal C. R. * Lawrence D. J. Banerdt W. B. A Future Moon Mission: The Lunar Seismic Network [#2052] A seismic network is proposed for the Moon. In this mission, it is envisaged that a minimum of eight seismometers will be deployed around the Moon.

28 34th LPSC Program Tuesday, March 18, 2003 MARS 2003 ROVER AND SPECTRAL STUDIES 1:30 p.m. Salon B

Chairs: M. P. Golombek A. Wang

Bishop J. L. * Drief A. Dyar M.D. The Influence of Abrasion on Martian Dust Grains: Evidence from a Study ofAntigorite Grains [#1512] Grinding was shown to greatly affect the structure and spectral properties of antigorite grains. This study provides an example of how aeolian abrasion could alter clays on Mars and may explain why OH bands are not prevalent in the dust spectra.

Farrand W. H.* Gaddis L. R. Analysis of MGS TES Data over Acidalia Planitia and Cydonia Mensae: Compositional Evidence for Hydrovolcanic Activity? [#1601] MGS TES data, in combination with other MGS datasets, covering Acidalia and Cydonia were analyzed in a search for compositional evidence of water-magma interactions. One likely indicator of such interactions are high basaltic glass fractions in Acidalia.

Trautner R. * Chicarro A. C. Martin P. D. Coordinated Science Operations of Mars Express Orbiter and Lander [#1634] The Mars Express orbiter and the Beagle2 lander carry a comprehensive set of instruments for the investigation of Mars. The orbiter and lander science operations will be coordinated in order to maximize the scientific output of the Mars Express mission.

Milam K. A. * Stockstill K. R. Moersch J. E. McSween H. Y. Jr. Tornabene L. L. Ghosh A. Wyatt M. B. Christensen P.R. THEMIS Characterization of the MER Gusev Crater Landing Site [#1061] This study uses newly acquired THEMIS visible and TIR data, along with TES, MOC, and MOLA data to examine the geologic setting of Gusev crater, a MER-a candidate landing site.

Golombek M. * Grant J. Parker T. Kass D. Crisp J. Squyres S. Carr M. Adler M. Zurek R. Haldemann A. Arvidson R. Weitz C. Selection of the Final Four Landing Sites for the Mars Exploration Rovers [#1754] The final four potential MER landing sites have been selected from six sites evaluated in detail and a safe, low-wind site in Elysium. The highest priority science sites are Meridiani and Gusev; the safest sites appear to be Meridiani and Elysium.

Greenhagen B. T. * Kirkland L. E. Herr K. C. Mars Analogue Field Spectroscopy: Building Real-World Experience for the Mars 2003 Rover Mini-TES [#1844] Our field spectrometers measure with the highest fidelity to the Mini-TES of any field instrumentation available. We will report critical lessons from field experience, and implications for Mini-TES interpretations and sources of uncertainties.

Deal K. S. Arvidson R. E. Jolliff B. L. Remote Mapping of the Ka 'u Desert, Hawai'i: Silica in a Mars Analog Terrain [#1952] Analyses of Mars analog materials in the Ka'u Desert, Hawai'i, has revealed amorphous silica to be the primary component of lava flow surface coatings, duricrust cements, and solfatara incrustations.

34th LPSC Program ______29 Dyar M.D.* Schaefer M. W. Mossbauer Spectroscopy on the Martian Surface: Constraints on Interpretation of MER Data [#1329] MER Mossbauer spectrometers have the exciting potential to identify and quantify relative amounts ofFe-bearing minerals, but interpretation of these results has limitations. Spectral non-uniqueness, temperature dependence, recoil-free fraction effects, and particle size must all be considered.

Schaefer M. W. * Dyar M.D. Mossbauer Spectroscopy on the Martian Surface: Predictions [#1381] Moss bauer spectrometers will be used on upcoming Mars landers to identify and quantify relative amounts of iron-bearing minerals. To interpret these data, we must understand the Mossbauer parameters of minerals that we might expect to find on Mars. We present a discussion of such minerals.

Milliken R. E. * Mustard J. F. Observations and Modeling of the Adsorbed Water in Montmorillonite with Reflectance Spectroscopy [#1345] Loss of adsorbed H20 in reflectance spectra of montmorillonite is modeled as a function of scattering (QS) and absorption (QA) efficiencies of H20. This method is capable of detecting and modeling changes in reflectance spectra due to small changes (<0.1 wt.%) of adsorbed H20.

Dalton J. B.* Bishop J. L. Micro-Spectroscopy as a Tool for Detecting Micron-scale Mineral Variations Across a Rock Swface: An Example Using a Thin Section of Martian Meteorite ALH 84001 [#2066] Visible and near-infrared spectra of a portion of martian meteorite ALH84001 were acquired using a high resolution imaging microscope to investigate imaging spectroscopy for mineral detection at small scales.

Cord AM.* Pinet P. C. Daydou Y. Chevrel S. Experimental Determination of the Hapke Shadowing Function Parameter for Planetary Regolith Surface Analogs [#1349] This work presents a method for a determination of the global set of parameters involved in Hapke's model for planetary surface analogs. We focus on the physical meaning of the shadowing function parameter.

Putzig N. E. * Mellon M. T. Arvidson R. E. Kretke K. A Thermal Inertia Analysis of the Martian Globe, South Polar Region, and Past Landing Sites [#1429] We present new results from analysis of MGS-TES thermal inertia. A new unit of low thermal inertia and albedo dominates the south polar region. Past landing site data constrains our interpretation of thermal surface units.

30 ______~34th LPSC Program Tuesday, March 18,2003 MARS GEOPHYSICS AND TECTONICS 1:30 p.m. Salon C

Chairs: H. V. Frey S. A. Hauck II

Arkani-Hamed J. * Thermo-Remanent Magnetization of Martian Lithosphere [#1948] The TRM of the martian lithosphere is determined assuming that the upper part of the lithosphere was magnetized by the core field and the lower part by the magnetic field of the upper part. The lower part can have appreciable contributions to the observed magnetic anomalies.

Frey H. V. * Large-Diameter Visible and Buried Impact Basins on Mars: Implications for Age of the Highlands and (Buried) Lowlands and Turn-Off of the Global Magnetic Field [#1838] Large diameter buried basins greatly outnumber visible impact basins of the same size., The buried lowland crust may be slightly younger than the highlands. Two out 10 very large basins may pre-date the disappearance ofthe global magnetic field.

Hood L. L. * Richmond N.C. Pierazzo E. Rochette P. Distribution of Crustal Magnetic Fields on Mars: Shock Effects of Basin-forming Impacts [#1704] Radially extended shock demagnetization caused primarily by the Hellas and Argyre impacts can potentially explain a majority of the distribution of crustal magnetic fields in the southern highlands of Mars.

Solomon S. C. * Aharonson O. Banerdt W. B. Dombard A. J. Frey H. V. Golombek M.P. Hauck S. A. II Head J. W. III Johnson C. L. McGovern P. J. Phillips R. J. Smith D. E. Zuber M. T. Why are There So Few Magnetic Anomalies in Martian Lowlands and Basins? [#1382] We suggest that hydrothermal alteration of magnetic carriers within the crust beneath Martian lowlands and basins may have contributed to the pattern of crustal magnetization observed today.

Scott E. R. D. * Fuller M. D. A Source for the Martian Crustal Magnetic Field [#1892] We propose that the crustal magnetic fields on Mars may be due to single-domain magnetite formed by thermal decomposition of iron-rich carbonate that precipitated in basalt during alteration by a C02-rich fluid.

Kiefer W. S. * Gravity Evidence for Extinct Magma Chambers on Mars: Tyrrhena Patera and Hadriaca Patera [#1234] MGS gravity data requires the presence of dense, cumulate minerals in extinct magma chambers beneath Tyrrhena Patera and Hadriaca Patera. These observations provide our first look at the magmatic plumbing system on Mars.

Hauck S. A. II* SolomonS. C. Phillips R. J. Potential Sources of Hesperian Contractional Tectonics on Mars [#1667] We review the potential contribution to contractional strain of a variety of global, regional, and local mechanisms in order to isolate those that might have influenced the deformation that formed wrinkle ridges on Hesperian plains materials on Mars.

Goudy C. L. * Schultz R. A. Wrinkle Ridges in Hesperia Planum and the Stress State in the Eastern Hemisphere of Mars [#1475] We interpret Late Noachian reactivation of preexisting faults in Hesperia Planum based on Coulomb failure stress changes. This implies a regional stress state rotation of 90° between the Noachian and Late Noachian/Hesperian.

34th LPSC Program ______31 Johnson C. L. * Phillips R. J. Constraints on the Evolution of the Tharsis Region of Mars [#1360] We suggest a mechanism for the formation and evolution ofthe Tharsis province that satisfies gravity, topography and magnetic data and the regional tectonic history.

Lowry A. R. * Zhong S. Suiface Versus Internal Loading of the Tharsis Rise, Mars [#1798] We introduce a method to invert load structure from geoid and topography of a viscoelastic planetary body. We use the method to assess relative contributions of (1) volcanic construction and (2) an upwelling mantle plume in the Tharsis province, Mars.

Anderson R. C.* Dohm J. M. Hare T. Haldemann A. F. C. Baker V. Strain Histories Among Alba and Syria Planum, Mars [#1839] This investigation highlights two prominent centers in the Tharsis region, Syria Planum and Alba Patera focusing on their similarities and distinctions, topographic and morphologic signatures, deformational extent, and intensities and durations of activity.

Okubo C. H. * Schultz R. A. Two-dimensional Wrinkle Ridge Strain & Energy Release Based on Numerical Modeling ofMOLA Topography [#1283] Numerical models of MOLA-based wrinkle ridge topography provide depth-dependent fault- and fold-related strain, and more significantly reveal along-strike variability in the magnitude of work done, or energy released, through wrinkle ridge formation.

Buczkowski D. L. * Cooke M. L. McGill G. E. Double-ringed Circular Grabens and Thickness of Cover Material in Utopia Planitia, Mars [#1042] Analytical and numerical models of compaction, drape folding and horizontal extension (1) explain the doubling of circular grabens and (2) explain an observed dependency of graben spacing on cover thickness in Utopia Planitia.

32 34th LPSC Program Tuesday, March 18, 2003 CARBONACEOUS CHONDRITES: WATER AND ORGANICS FOR DUMMIES 1:30 p.m. Marina Plaza Ballroom

Chairs: J. M. Eiler M. A. Sephton

Housley R. M. * A Themodynamic Basis for Extensive Intermediate Temperature Vapor Phase Transport on Meteorite Parent Bodies [#1162] This work provides a thermodynamic basis for understanding vapor phase transport as hydroxide molecules on meteorite parent bodies.

Zolotov M. Yu. * Shock E. L. Aqueous Oxidation of Parent Bodies of Carbonaceous Chondrites and Galilean Satellites Driven by Hydrogen Escape [#2047] We argue and illustrate numerically that profound oxidation that led to formations of sulfates in parent bodies of carbonaceous chondrites and Galilean satellites could have been driven by hydrothermal alteration followed by H2 escape into space.

Eiler J. M. * Hydrogen-Isotope Constraints on the Origin and Evolution of the Carbonaceous Chondrites [#1411] DIH ratios of CM chondrite matrix and whole rocks are correlated with indices of aqueous alteration. These data constrain properties of their protoliths, the source of reactant water, and their relationships to other carbonaceous chondrite types.

McDonough W. F. * Teng F-Z. Tomascak P. B. Ash R. D. Grossman J. N. Rudnick R. L. Lithium Isotopic Composition ofChondritic Meteorites [#1931] Heavily hydrated meteorites Orgueil and Murchison have significantly higher 87Li values than CV, CO, and CK chondrites. The negative trend in 87Li values with petrologic grade for bulk chondrites is likely to be due to aqueous alteration processes.

Bland P. A. * Alard O. Gounelle M. Rogers N. W. Trace Element Variation in Carbonaceous Chondrite Matrix [#1750] We used laser ablation and solution ICP-MS to analyse the trace element composition of matrix in a range of carbonaceous chondrites. In most cases our results are broadly consistent with an incomplete condensation model of volatile fractionation.

Chizmadia L. J. * Brearley A. J. Mineralogy and Textural Characteristics of Fine-grained Rims in the Yamato 791198 CM2 Carbonaceous Chondrite: Constraints on the Location ofAqueous Alteration [#1419] Fine-grained rims in Yamato 791198 are dominated by amorphous to microcrystalline materials. Well-crystallized phyllosilicates are absent. There is no evidence of accretion of a heterogeneous mixture of altered and unaltered materials.

Brearley A. J. * Nanophase, Low-Ni Metal Grains in Fine-grained Rims in the Murchison CM2 Chondrite: Insights into the Survival of Metal Grains During Aqueous Alteration [#1364] TEM and EFTEM studies reveal partially oxidized nanophase kamacite grains in fine-grained rims in Murchison. The grains are rimmed by amorphous carbon and magnetite. We suggest that the carbon layer protected the metal from full oxidation during parent body aqueous alteration.

34th LPSC Program ______33 Zolensky M. E. * Le L. Iron-Nickel Sulfide Compositional Ranges in CM Chondrites: No Simple Plan [#1235] We present analyses ofFe-Ni sulfides in ten CM carbonaceous chondrites, and discuss the trends with increasing degree of aqueous alteration.

Pizzarello S. * Huang Y. Fuller M. The Carbon Isotopic Distribution of Murchison Amino Acids [#1036] The carbon isotopic composition of individual amino acids of the Murchison meteorite was determined by GC-C-IRMS. The carbon composition of the compounds was found to vary significantly from - +8 to+ 53%o.

Cody G. D. * Alexander C. M. O'D. Tera F. Compositional Trends in Chondritic Organic Solids Within and Between Meteoritic Groups [#1822] Pure organic residues of a CR2, Cll, CM2, and Tagish Lake meteorites have been completely analyzed using seven independent solid state NMR experiments. Comparing the degree of oxidation of labile organic carbon the degree of oxidation ranks TL > CM2 > Cll > CR2.

Sephton M.A.* Love G. D. Watson J. S. Verchovsky A. B. Wright I. P. Snape C. E. Gilmour I. Hydropyrolysis of High Molecular Weight Organic Matter in Murchison [#1619] Hydropyrolysis of the Murchison macromolecular material releases polyaromatic compounds including phenanthrene, carbazole, fluoranthene, pyrene, chrysene, perylene, benzoperylene and coronene units with varying degrees of alklyation.

Derenne S. * Rouzaud J.-N. Maquet J. Bonhomme C. Florian P. Robert F. Abundance, Size and Organization ofAromatic Moieties in Insoluble Organic Matter of Orgueil and Murchison Meteorites [#1316] Characterization of aromatic units in the insoluble organic matter of the Orgueil and Murchison meteorites was performed through solid state 13C NMR (with different sequences) and quantitative high resolution transmission electron microscopy.

Marrocchi Y. * Razafitianamaharavo A. Michot L. J. Marty B. Toplis M. J. Low Pressure Adsorption ofAr, Kr and Xe on Kerogen: Implications for the Trapping of Noble Gases onto Meteoritic Matter [#1699] Low pressure adsorption (i.e. solar nebula) of Ar, Kr and Xe on kerogen (Q analog) suggest that for environmental temperatures <80K, adsorption could well be responsible for the concentration and subsequent trapping of noble gases in Q.

34 ______34th LPSC Program Tuesday, March 18, 2003 POSTER SESSION I 7:00 p.m. Fitness Center

Chicxulub

Schmitt R. T. Stoffler D. Wittmann A. Shock Metamorphism of Impactite Lithologies of the ICDP Chicxulub Drill Core YAX-I [#1327] The ICDP Chicxulub drillcore Y AX-1 exposes about 100m of allochthonus polymict impact breccias in a depth of 794.63 to 894.94 m. In this preliminary study we focus on the shock effects and shock metamorphism of these impactites.

Wittmann A. Kenkmann T. Schmitt R. T. SWffler D. Clastic Polymict Dikes in the "Megablock" Sequence of the ICDP-Chicxulub Drill Core Yax-I [#1386] Clastic, polymict dikes in the me gab lock units of Chicxulub-Y AX -1 drill core were studied. Petrographic and structural relationships are used to interprete ductile and brittle deformation stages linked to the cratering process.

Hecht L. Schmitt R. T. Wittmann A. Hydrothermal Alteration of the Impactites at the ICDP Drill Site Yax-1 (Chicxulub Crater) [#1583] Post-impact hydrothermal alteration including alkali metasomatism and devitrification of impact melt glass has significantly modified the mineralogy and chemistry of the impact breccia lithologies.

Zurcher L. Kring D. A. Preliminary Results on the Post-impact Hydrothermal Alteration in the Yaxcopoil-1 Hole, Chicxulub Impact Structure, Mexico [#1735] Examination of new Chicxulub core samples reveals an evolving post-impact hydrothermal system between the peak ring and rim of the impact crater.

Gelinas A. Walker R. J. Kring D. A. Zurcher L. Osmium Isotope Constraints on the Proportion of Bolide Component in Chicxulub Impact Melts [#1359] Chicxulub impact meltrocks from theY AX-1 drill core have very low Os concentrations, suprachondritic Re/Os and suprachondritic initial 1870s/1880s ratios ranging from about 0.3 to 0.5. These results indicate a modest to negligible meteoritic component in the samples analyzed.

Liiders V. Horsfield B. Kenkmann T. Mingram B. Wittmann A. Hydrocarbons and Aqueous Fluids in Cretaceous Sediments of the ICDP-Chicxulub Drill Core Yax-1 [#1378] Fluid inclusion studies in quartz from fissures of the Chicxulub drill core reveal evidence for high-temperature fluid and hydrocarbon migration. Hydrocarbons formed from organic matter in the megablock. Mobilization is likely caused by the impact.

Goto K. Tada R. Bralower T. J. Tajika E. Matsui T. Crater-filling as a Probable Cause of Giant Tsunamis at the Cretaceous/Tertiary Boundary [#1531] Lithology, grain composition, chemical composition, grain size and nannofossil assemblage of the samples from Y AX-1 core were analyzed to investigate the possibility of the marine invasion into the Chicxulub crater immediately after the KTB impact.

Hildebrand A. R. Millar J.D. Pilkington M. Lawton D. C. Three Dimensional Gravity Field Modelling of the Chicxulub Impact Crater [#2096] Three dimensional gravity modelling indicates that the Chicxulub crater has an irregularly shaped twin peaked structural uplift of 40 to 50 km diameter. The shape of the central uplift is different than that inferred from velocity studies.

34th LPSC Program ______35 Poking Holes: Terrestrial Impacts

King D. T. Jr. Petruny L. W. PopeK. O. Ocampo A. C. The Albion Impactoclastic Breccia (Albion Diamictite Bed): Cumulative Grain-size Frequency Curves and Possible Modes of Emplacement [#1995] Albion impactoclastic breccia (=Albion diamictite) is a very coarse, poorly sorted, and contains particles sized from <1 mm to over 9 m. Grain-size frequency analysis suggests a combination of two clast populations due to one of two possible factors.

Harris R. S. Re-Evaluating the Origin of an Upper Eocene Diamictite in the Coastal Plain of East-Central Georgia: An Impactoclastic Layer? [#1965] An unusual diamictite in the Upper Eocene stratigraphy of the Georgia Coastal Plain previously has been interpreted as a volcaniclastic unit. An initial re-evaluation of its origin suggests that the layer could be related to a Late Eocene impact.

Krull A. E. Lowe D. R. Byerly G. R. Compositional Grading in an Impact-produced Spherule Bed, Barberton Greenstone Belt, South Africa: A Key to Condensation History of Rock Vapor Clouds [#1474] This study examines the vertical compositional variability in a single early Archean spherule bed in the Barberton Greenstone Belt, South Africa in order to better identify the process by which impact vapor clouds condense and spherules form and accumulate.

Glass B. P. Australasian Microtektites in the South China Sea: Implications Regarding the Location and Size of the Source Crater [#1092] The highest concentration of Australasian microtektites and the highest ratio of unmelted ejecta to microtektites has been found in at ODP Hole 1144A in the northern South China Sea. These, and other data, were used to reevaluate the location and size of the Australasian strewn field source crater.

Wrobel K. E. Schultz P. H. The Effect of Rotation on the Deposition of Terrestrial Impact Ejecta [#1190] The rotation of the Earth significantly modifies ejecta deposition. Results indicate the importance of incorporating the Corio lis force in predictions of locations and thicknesses of distal ejecta deposits.

Harvey R. P. Boyd H. A Search for Impact Debris in the Pliocene Age Sirius Group, Transantarctic Mountains [#1726] The Sirius Group of Pliocene rocks from Antarctica have a heritage of mixed geological processes that may have included impact events. We shall report the results of our ongoing search for impact materials in this rock.

Artemieva N. A. Bland P. A. Crater Fields on Venus, Earth and Mars [#1319] Numerical simulations of disrupted meteoroid motion through atmsophere allows to reproduce crater strewn fields on Venus and Earth, but not on Mars. The majority of multiple and irregular craters are created by iron projectiles, although this type of impactor accounts for <10% of the total flux.

Edwards W. N. Hildebrand A. R. Locating Bolide Terminal Bursts Using Seismic Arrival Times: A Supracenter Location Program [#1447] A program has been written to locate the geographic position of a fireball's terminal burst. Using atmospheric ray tracing that includes the anisotropic effect of winds; SUPRACENTER locates these explosive events in four dimensions (three spatial and time).

36 ______~34th LPSC Program CudnikB. M. Some Recommendations for a Comprehensive Lunar Meteor Campaign [#1242] In light of recent positive results in the search for lunar meteoritic phenomena, this paper briefly outlines a recommended campaign to pursue for a comprehensive, multi-wavelength study of lunar meteor impact phenomena. A few applications for potential findings are also described.

Abbott D. H. Glatz C. A. Burckle L. H. Nunes A. A. Puchtel I. S. Humayun M. Multidisciplinary Methods of Finding and Verifying Abyssal Impact Craters: Results and Uncertainties [#1858] We present evidence for the presence of two previously unknown abyssal impact craters, a prospective source crater for the late Pliocene Eltanin impact layer and the late Miocene Ewing impact layer.

Jurena D. J. French B. M. Gaffey M. J. Gravity Transect Profile and PDFIPF Comparisons from the Bee Bluff Structure [#2076] Support for an impact origin of this structure includes an anomaly profile similar to other impact structures. PDF orientations support this as well and also indicate a distinct separate source for PDFs outside the structure.

Rossi A. P. Baliva A. Piluso E. New Evidences of an Impact Origin for Temimichat Crater, Mauritania [#1882] Temimichat crater (Mautitania) was recently visited and sampled. Possibly impact-related pseudotachilite veins have been observed. Preliminary results are presented.

Al-Mishwat A. T. Wadi Na'am Structure: A Possible Concealed Impact Feature from Central Southwest Saudi Arabia [#1049] I report on the occurrence of a possible impact structure from central southwest Saudi Arabia. It is Precambrian in age and wholly concealed below lower Paleozoic sedimentary cover.

Macdonald F. A. Bunting J. A. Cina S. E. Yarrabubba, Western Australia: A Large, Deeply Eroded, Ancient Impact Structure in the Yilgam Craton [#1116] Shock-metamorphic effects were discovered in deeply eroded Archean granites in Western Australia. Preliminary estimates indicate that the Y arrabubba impact structure is of a Paleoproterozoic age and at least 30 km in diameter.

Krochuk R. V. Sharpton V. L. Morphology of the Temy Astrobleme Based on the Field Observation and Sample Analysis [#1489] Here we present a new data collected during 2002 fieldwork on the Terny astrobleme in Ukraine. Preliminary result of the observations are morphological features of this eroded crater such as proposed location of the central uplift, isotopic age estimate.

Pilkington M. Hildebrand A. R. Transient and Disruption Cavity Dimensions of Complex Terrestrial Impact Structures Derived from Magnetic Data [#1745] Using published values of crater diameters (D) and values of collapsed disruption cavity diameter, D(CDC) derived from magnetic data for 19 complex terrestrial impact structures, we derive the relationship D(CDC) = 0.49 D.

Trepmann C. A. Spray J. G. Shocked Quartz as an Indicator of the Loading and Relaxation Conditions During and After Hypervelocity Impact- Microstructural Evidence from Crystalline Target Rocks of the Charlevoix Impact Structure, Canada [#1379] Shocked quartz from crystalline target rocks of the Charlevoix impact structure, Canada, has been investigated to yield information on the loading and relaxation conditions during and after hypervelocity impact.

34th LPSC Program ______37 Baratoux D. Melosh H. J. Numerical Modeling of Shatter Cones Development in Impact Craters [#1546] We present a new model for the formation of shatter cones in impact craters. Our model has been tested by means of numerical simulations. Our results are consistent with the observations of shatter cones in natural impact craters and explosions experiments.

Dressler B. O. Reimold W. U. Impact Breccias in the Central Vredefort Dome- Revisited [#1019] Vredefort Dome pseudotachylites have a random, Granophyre a radial orientation, independent from target rock structures. Pseudotachylites form through explosive transfer of thermal shock energy. Boulders similar to Sudbury Footwall Breccia occur.

Wieland F. Gibson R. L. Reimold W. U. Impact-related Structures in the Central Uplift of the Vredefort Impact Structure, South Africa [#1013] Results of detailed structural mapping in the collar of the Vredefort Dome are presented and have implications for the various stages of central uplift formation.

Tagle R. Stoffler D. Claeys P. Erzinger J. A Non-magmatic Iron Meteorite as Impactor for the Rochechouart Crater [#1835] PGE and siderophile elements composition of the Rochechouart impact melts is similar to that of non-magmatic iron meteorites. The contamination of the melt is a result from a combination of iron an silicate phases of this type of meteorite.

Ohman T. Badjukov D. D. Raitala J. Petrova T. L. Stehlik H. Impactites of the Paasselkii and Suvasvesi South Craters, Finland [#1571] The discovery of impactites in vicinities of the Paasselka and Suvasvesi South craters provides definitive evidence of the impact origin of the two structures. Ni- and Co-containing pyrite was found in altered glass inclusions in Suvasvesi breccia.

Diaz-Martinez E. Ormo J. An Alternative Hypothesis for the Origin of Ferman Ringwoodite in the Pumice of El Gasca (Caceres, Spain) [#1318] El Gasco is the first location where ferroan ringwoodite (iron silicate spinel) is found on Earth. We propose an hypothesis to explain its origin, unrelated to impact shock metamorphism, and with implications for the study of high-pressure minerals.

Sheffer A. A. Melosh H. J. Jamot B. M. Lauretta D. S. Reduction of Silicates at High Temperature: Fulgurites and Thermodynamic Modeling [#1467] We present a new fulgurite with extremely reduced Fe-Si-Al metallic phases. Thermodynamic modeling of a simplified composition suggests that AI may be an important contributor to the reduction of silicates.

Digging Deeper: Impact Experiments and Theory

Cintala M. J. Bamouin-Jha O. S. Horz F. A Method of Estimating Transient-Cavity Diameters for Impact Craters Formed in Dry Sand [#2070] A technique used to measure the velocities of ejecta from impact craters permits, in principle, extrapolation to the rim of the transient cavity before its modification. Knowledge of the dimensions of the transient cavity could be instrumental in addressing a number of problems.

Wada K. Senshu H. Yamamoto S. Matsui T. A Numerical Simulation of Impacts into Granular Materials by Distinct Element Method [#1529] We discuss the application of the Distinct Element Method for numerical simulations of impacts into granular materials by comparing with experimental data.

38------~34th LPSC Program Anderson J. L. B. Schultz P. H. Reineck J. T. A Test of Maxwell's Z Model Using Inverse Modeling [#1762] Experimental ejection angles determined using 3D PIV are used to constrain various modifications of Maxwell's Z Model in order to test the utility of the point-source approximation for both vertical and oblique impacts.

VanVeghten T. W. Flynn G. J. Durda D. D. HartS. Asphaug E. Mass and Size Frequency Distribution of the Impact Debris from Disruption ofChondritic Meteorites [#1264] We used the NASA AVGR to disrupt several -70--200 g samples of chondrite meteorites. The debris from each impact was sieved and the material in each sieve was weighed, along with the individual particles in the largest two sieves. From this, fragment mass and size distributions were determined.

Trubetskaya I. A. Shuvalov V. V. Impacts of 100-km-Diameter Asteroids Against the Earth [#1102] The purpose of this study is to determine ejecta velocity distribution, the distribution of deposits on the Earth's surface, and the mass of escaped atmosphere.

Korycansky D. G. 3D Simulations of Comet Impacts into the Atmospheres ofTitan and Venus [#1196] We present the results of 3D simulations of the impact of porous icy comets into the atmospheres of Titan and Venus. We analyze and characterize the resulting profiles of ablation and mass deposition into the atmosphere for the purpose of predicting crater populations.

Shuvalov V. Dypvik H. Ejecta Formation and Deposition After the Mj¢lnir Impact [#1056] In this study the ejecta distribution of the Jurassic/Cretaceous MjS3lnir Crater (Barents Sea) is numerically simulated. These simulations show a highly asymmetrical ejecta distribution and underline the importance of the presence of water in ejecta formation and distribution.

Abramov O. Kring D. A. Finite-Difference Modeling of Impact-Induced Hydrothermal Systems [#1846] The computer program HYDROTHERM is applied to terrestrial impact craters to model convective and conductive water and heat transport. The goal is to estimate the lifetimes of impact-induced hydrothermal systems and further understand their mechanics.

South Pole-Aitken Sample Mission

Spudis P. D. Bussey D. B. J. South Pole-Aitken Basin: Geology, Basin Floor, and Unit Compositions [#1693] We have compiled a variety of remote sensing data in order to understand as completely as possible, the geological setting of South Pole-Aitken basin units, with the aim of identifying targets where specific exploration goals can be addressed.

Petro N. E. Pieters C. M. How Much Melt Breccia Can be Found in South Pole-Aitken Basin? [#1427] The amount of SPA melt breccia material at the surface is estimated based on ejecta thickness and mixing equations. Despite several major ejecta emplacement events 59% of the regolith is estimated to represent material from the SPA impact melt sheet.

34th LPSC Program ______39 Moon and Mercury: Early Evolution, Basalts, and Regolith

Scott R. S. Wilson L. The Stress State of a Cooling Magma Ocean [#1717] We address the early thermal and mechanical evolution of a lunar crust forming from a magma ocean to assess the conditions under which early volcanism may have occurred. Large compressive stresses may have been temporally and spatially common.

Consolmagno G. J. The Composition and Evolution ofa Geophysically Reasonable Moon Produced by a Giant Impact [#1165] If the Moon was made of material from the Giant Impact impactor, then its bulk composition will be strongly affected by the previous evolution of that impactor, with interesting geochemical implications.

Yin Q. Z. Jacobsen S. B. Wasserburg G. J. Cautionary Notes on Cosmogenic 182W and Other Nuclei in Lunar Samples [#1510] We strike a cautionary note on cosmogenic 182W on lunar samples (Lee et al., 2002). There are inconsistencies with other isotope data, such as 149Sm isotope obtained from the same sample. There is also potential problem with 181 Ta overlapping 182W.

Anand M. Taylor L. A. Nazarov M. A. Patchen A. Petrologic Comparisons of Lunar Mare Basalt Meteorites Dh-287A and NWA 032 [#1787] Dh-287 A and NW A 032 are two out of only five mare basalt meteorites in the entire lunar meteorite collection. In this study, their petrologic comparisons have been made to understand the magmatic history of the Moon.

Jolliff B. L. Korotev R. L. Zeigler R. A. Floss C. Haskin L. A. Northwest Africa 773: Lunar Mare Breccia with a Shallow-formed Olivine-cumulate Component, Very-Low-Ti Heritage, and a KREEP Connection [#1935] Mineral compositions and a KREEP-like trace element pattern indicate that the olivine-cumulate lithology and breccia components of NW A773 formed in a shallow magma chamber from melt of composition similar to green, VLT volcanic glass from Apollo 14.

Neal C. R. Kramer G. Y. The Composition of KREEP: A Detailed Study of KREEP Basalt I5386 [#2023] The purpose of this study was to analyze 15386 by inductively coupled plasma mass spectrometry (ICP-MS) for 40 trace elements, including many not previously quantified in this sample.

MayneR. G, Taylor L. A. New Insights into the Origin of 14053- The Only Basaltic Rock Returned by Apollo I4 [#1604] Apollo 14 basalts, 14053 and its small-sized pair, 14072, are unique among the rocks in the lunar collection, in that they possess evidence for being the most reduced of all lunar basalts. It is to the origin of these unusual rocks to which this study is addressed.

Kramer G. Y. Neal C. R. Petrogenesis of the Apollo 14 High-A! Basalts Revisited: Distinct Magmatic Events, Source Metasomatism, and AFC [#2035] New ICP-MS data for the Apollo 14 high-Al basalts and literature data are used to revisit the petrogenesis of the oldest returned lunar basalts.

Elkins-Tanton L. T. Chatterjee N. Grove T. L. Magmatic Processes that Produced Lunar Fire Fountains: Evidence from Vesicular Rims on Picritic Glass Beads [#1486] There are small patches of highly vesicular, sulfur-rich green glass adhering to A15 green glasses in slide 15426,72. Their compositional data are consistent with a heterogeneous mantle at depth, or with origination in a primordial source.

40 34th LPSC Program Hagerty J. J. Shearer C. K. Vaniman D. T. The Behavior of Thorium in Lunar Picritic Magmas: Implications for the Bulk Thorium Content of the Lunar Mantle and Lunar Heat Flow [#1784] Th concentrations in lunar pyroclastic glasses have been used to represent the Th content of primary melts from the lunar mantle. The data suggest that substantially lower values of Th and U need to be used for global lunar heat flow calculations.

FlorE. L. Jolliff B. L. Gillis J. J. Mapping the Concentration of Iron, Titanium, and Thorium in Mare Basalts in the Western Procellarum Region of the Moon [#2086] Remotely sensed compositions in the western Procellarum region indicate indigenous Th enrichment in basalts. Concentration of radioactive elements in mantle sources beneath Procellarum provide heat needed for extended volcanic activity.

Jackson N. W. The Source of Lunar Basalts in the Northern Oceanus Procellarum Region [#1010] An investigation to infer the flow directions of basalt in northern Oceanus Procellarum. A study of the basalts' stratigraphy and topography of this region to infer the direction of the flow of the basalt into northern Oceanus Procellarum.

Staid M. I. Eliason E. M. Gaddis L. R. Pieters C. M. Global Comparisons of Mare Crater Spectra from Clementine UWIS and NIR Data [#1767] The reflectance properties of small mare craters are examined using Clementine UVVIS and NIR multispectral data (0.4-2.0 microns). Near and far side mare deposits are compared to investigate the global distribution and diversity of lunar volcanism.

Hiesinger H. Head J. W. III WolfU. Jaumann R. Neukum G. Ages of Lunar Mare Basalts in Mare Frigoris and Other Nearside Maria [#1257] We performed new crater counts for basalts in Mare Frigoris, Nectaris, Smythii, Marginis, Vaporum, Sinus Medii, Palus Putredinis and the craters Schickard, Grimaldi, Criiger, Hubble, Joliot, Goddard, and two lava ponds south of the crater Endymion.

Demidova S. I. Nazarov M. A. Taylor L. A. Patchen A. Dhofar 304, 305, 306 and 307: New Lunar Highland Meteorites from Oman [#1285] First data of petrology and mineralogy of Dhofar 304, 305, 306 and 307 lunar highland meteorites are reported. Dhofar 304 may be paired with Dhofar 025. Dhofar 302, 303, 305, 306 and 307 are probably paired.

Nazarov M.A. Demidova S. I. Taylor L.A. Trace Element Chemistry of Lunar Highland Meteorites from Oman [#1636] Trace-element chemistry ofDhofar 280, 301-310 lunar highland meteorites is reported. Dhofar 025,301, 304 and 308 possibly represent a single and most-ancient fall. Dhofar 081 and 280 are not paired with other lunar stones collected nearby.

Korotev R. L. Jolliff B. L. Campbell A. J. Humayun M. Laser-Ablation ICP-MS Analyses of Meteoritic Metal Grains in Lunar Impact-Melt Breccias [#1487] We test the feasibility of using laser-ablation ICP-MS of metal grains in lunar breccias as a means to distinguish among different impact events. Metal grains from KREEP-rich melt breccias of Apollo 16 are all similar in composition, and somewhat different from those of Apollo 17 melt breccias.

Kong M. Bhattacharya R. N. James C. Basu A. Estimating the Average Diameter of a Population of Spheres from Observed Diameters of Random Two-Dimensional Sections [#1120] Probabilistic deduction predicts n/4 as the conversion factor to estimate mean 3D diameter of a population of spheres from their 2D sizes in sections, which is supported by numerical solutions to 2D distributions of FeO globules in agglutinates.

34th LPSC Program ______41 Pieters C. M. Taylor L. A. New Model for Agglutinitic Glass Formation from LSCC Data [#1223] Combined LSCC data of representative mare and highland soils suggest preferential melting of mineral species is more likely than the F3 model for agglutinate formation. Proposed mineral preference entering the melt is orthopyx > plag > clinopyx » ilmen.

James C. L. Letsinger S. L. Basu A. Wentworth S. J. McKay D. S. Nanophase Iron Globules in Lunar Soil [#1992] Determination of size distribution of nanophase iron globules in lunar soils requires both SEM and TEM imaging.

Kurahashi E. Yamanaka C. Nakamura K. Sasaki S. Laboratory Simulation of Space Weathering: ESR Measurements of Nanophase Metallic Iron in Laser-irradiated Olivine and Pyroxene Samples [#1499] To simulate space weathering, we irradiated nanosecond pulse laser beam onto olivine and pyroxene pellets. After laser irradiation, we measured the samples by an Electron Spin Resonance to perform quantitative analysis of nanophase iron particles.

Wiesli R. A. Beard B. L. Taylor L.A. WelchS. A. Johnson C. M. Iron Isotope Composition of the Lunar Mare Regolith: Implications for Isotopic Fractionation During Production of Single Domain Iron Metal [#1500] Iron-isotope analyses of lunar mare regolith samples indicate an enrichment of the heavy isotopes in the more fine grained, mature soil samples with respect to immature, coarser grained size fractions, possibly due to Fe vaporization during meteorite impacts.

Taylor L. A. Pieters C. Patchen A. Taylor D.-H. Morris R. V. Keller L. P. McKay D. S. Mineralogical Characterization of Lunar Highland Soils [#1774] The modal abundances and chemistry of the minerals and glasses in the finest fractions ( <45 micron) of 10 selected Apollo 14 and 16 highland soils have been studied. These data will be used to refine spectral reflectance models and aid in understanding the formation of the highland soils.

Sugihara T. Owada A. Ohtake M. Takeda H. MGM Deconvolution of Reflectance Spectrum ofthe Y981031 Lunar Meteorite [#1568] We report Modified gaussian model (MGM) deconvolution analyses of reflectance spectrum of the Yamato (Y) 981031. Absorption features derived from the MGM deconvolution are compared with the petrological characteristics ofY981031, and implication of the absorption features are discussed.

Levine J. Kamer D. B. Muller R. A. Renne P.R. Lunar Impact History from Apollo 12 Glass Spherules [#1034] We are measuring the impact history of the inner solar system by dating, with the 40ArP 9 Ar method, glass impact spherules from the Apollo 12 mission to the Procellarum Basin. One interest is in looking for the 400 Ma increase in cratering observed by Culler et al. (2000).

NormanM. D. Regional Heterogeneity of K.REEP: Impact Melts from Apollo 16 and 17 [#1180] Integrated studies of lithophile element compositions, siderophile element signatures, and chronologies of lunar impact melts can be linked to provide a better understanding of the impact history and crustal evolution of the Moon.

Starukhina L. V. Shkuratov Yu. G. Swirl Formation: Cometary Wind or Meteoroid Swarm Encounter? [#1227] Mechanical and thermal effects of coma gas in cometary encounters with the Moon or Mercury are shown to be negligible as compared to those of comet nucleus explosure. Plowing of regolith by meteoroid swarm is proposed as mechanism of swirl formation.

42 ______.34th LPSC Program Starukhina L. V. Shkuratov Yu. G. Overmaturation of Lunar and Mercurian Regolith as a Mechanism of Brightening Effect [#1224] Growth of nanograins of reduced Fe to micron or submicron sizes can occur at Mercury surface temperatures or in large melted volumes on Mercury and the Moon. Such growth can result in brightening of mature regolith ("overmaturation").

AndreS. L. Robinson M.S. Watters T. R. Cook A. C. A Comparison of Topography and Shaded Relief of the Beethoven Quadrangle of Mercury [#2026] We compare topography and shaded relief within the Beethoven quadrangle of Mercury.

Watters T. R. Robinson M.S. The Spatial and Azimuthal Distribution of Lobate Scarps and High-Relief Ridges on Mercury [#1927] An understanding of the spatial and azimuthal distribution of lobate scarps on Mercury is important in constraining models for the origin of tectonic stresses. A comprehensive database of lobate scarps on the hemisphere of Mercury imaged by Mariner 10 is used to test these models.

MER 2003 Landing Sites: Hazards of Geology

Schroeder R. D. Golombek M. P. Mars Exploration Rover Landing Site Boulder Fields [#1975] Mars Orbiter Camera images of potential Mars Exploration Rover (MER) landing sites were used to measure boulder fields, and thus help to better quantify potentially hazardous rocks.

DiMaggio E. N. Schroeder R. D. Golombek M. P. Haldemann A. Castle N. Characterization ofMartian Rock Shape for MER Airbag Drop Tests [#1589] To aid in defining the rock distributions for MER airbag tests, images from the Viking Landers 1 and 2 and MPF were used to identify rocks that are >20 em high and characterize them by their shape and burial.

Golombek M.P. Matijevic J. R. DiMaggio E. N. Schroeder R. D. Rock Size-Frequency Distributions at the Mars Exploration Rover Landing Sites: Impact Hazard and Accessibility [#1778] Model rock size-frequency distributions indicate a low probability of impacting hazardous rocks at the four potential MER landing sites. Rocks large enough to analyze and abrade should be plentiful within an easy Sol's drive at all of the sites.

Ivanov A. B. Ten-Meter Scale Topography and Roughness of Mars Exploration Rovers Landing Sites and Martian Polar Regions [#2084] We will describe our latest results in processing MOC stereo pairs and resconstruction of ten-meter scale topography in MER landing sites and polar regions.

Kirk R. L. Howington-Kraus E. Redding B. Galuszka D. Hare T. Archinal B. A. High-Resolution Topomapping of Candidate MER Landing Sites with MOC: New Results and Error Analyses [#1966] Digital elevation models (DEMs) and slope statistics of the four candidate MER landing sites at 10m (stereo) and 3m (photoclinometry) indicate all sites are smooth and likely safe. Final safety assessment will be based on simulations using our DEMs.

Koeppen W. C. Seelos F. P. IV Arvidson R. E. Christensen P.R. Terrain Distributions in Meridiani Planum and Probability of Sampling by the Mars Exploration Rover [#1853] Terrain distributions are mapped in Meridiani Planum using THEMIS nighttime IR and MOC NA data. Probability of landing in particular terrains as well as sampling multiple geologic units is discussed.

34th LPSC Program ______43 Okubo C. H. Schultz R. A. Tanaka K. L. Fault-controlled Fluid Seep Potential and Surface Strength at the Isidis & Elysium Planitia MER Sites Based on Numerical Modeling of Wrinkle Ridge Topography [#1484] We evaluate surface properties and map locations of potential fracture-controlled fluid seeps at the Isidis and Elysium MER sites based on numerical modeling ofMOLA-derived wrinkle ridge topography.

Mars Odyssey: One Year of Science at Mars

Fergason R. L. Christensen P.R. Thermal Inertia Using THEMIS Infrared Data [#1785] A method was developed to produce high-resolution thermal inertia maps using THEMIS night-IR temperature data. This technique provides information that allows improved quantitative studies of small surface features.

Mustard J. F. First Look at the Thermophysical Properties of the Dissected Mantle [#2005] A combined analysis of MOC and nighttime THEMIS images of a latitude-dependent surfaces layer is presented that provides insight into the physical properties ofthis climatically important surface layer.

Wyatt M. B. McSween H. Y. Jr. Moersch J. E. Gorelick N. S. Christensen P.R. THEMIS Observations of Low-Albedo Intracrater Materials and Wind Streaks in Western Arabia Terra [#2009] THEMIS day/night TIR images are used for thermophysical and spectral analyses of low-albedo intracrater materials and wind streaks and are compared with TES surface compositions and MOC observations to constrain origin hypotheses for these materials.

Lane M.D. Christensen P.R. THEMIS Science Team Investigating the Martian Gullies for Possible Brine Origin: A Preliminary Search for Evaporite Minerals Using THEMIS Data [#1994] Here we investigate the possibility of brine outflow forming the Martian gullies by using THEMIS data to search for the presence of evaporite minerals at the gully sites.

Zimbelman J. R. Bender K. C. Harris J. C. Geologic Mapping Applications Using THEMIS Data for the Medusae Fossae Formation, Mars [#1390] THEMIS daytime IR images are revealing a wealth of detail in the Medusae Fossae Formation along the equator of Mars. The extensive dust cover of this area enhances the visibility of shallow slopes through measurable temperature differences, revealing important new topographic details.

Glotch T. D. Christensen P.R. The Geology ofA ram Chaos [#2046] Aram Chaos has a rich geologic history, including the formation of a crystalline hematite unit and a thermophysically unique cap unit. A model of the geologic history of Aram Chaos is presented.

Keller J. M. Boynton W. V. Taylor G. J. Kerry K. Janes D. M. Hamara D. Chamberlain M. A. Squyres S. W. Karunatillake S. Gasnault O. Mars GRS Team Preliminary Correlations of Mars GRS Elemental Abundances with Thermal Inertia, Albedo, and Rock Abundance [#2021] Preliminary correlations are presented between Mars GRS elemental abundances (water, silicon, potassium, iron, thorium, and chlorine) and planetary physical parameters (thermal inertia, albedo, and rock abundance).

Gasnault O. Maurice S. d'Uston C. Boynton W. V. Martian Gamma Albedo [#1649] We define and use a Martian gamma albedo measured by Odyssey. This dataset presents very good statistics. Using that parameter, we derive information on the transparency of the Martian atmosphere. Future works will try to monitor seasonal changes.

44 ______.34th LPSC Program Evans L. G. Reedy R. C. Boynton W. V. Effects of Solar Particles on the Mars Odyssey Gamma-Ray Spectrometer [#1591] The Mars Odyssey Gamma-Ray Spectrometer is seriously affected by solar particle events (SPEs). The spectra are distorted by these energetic particles. Intensities of gamma-ray peaks are increased during and often after an SPE, and a few new peaks appear.

Litvak M. L. Mitrofanov I. G. Smith D. E. Zuber M. T. Boynton W. Saunders R. S. Drake D. Seasonal C02 Observations on North and South of Mars as Seen by HEND (Mars Odyssey) and MOLA (MGS) [#1103] The joint analysis of HEND and MOLA observations within the same latitude belts for the same Martian seasons is presented.

Tokar R. L. Moore K. R. Elphic R. C. Wiens R. C. Funsten H. O. Mars Odyssey Neutron Sensing of the South Residual Polar Cap [#1628] Mars Odyssey GRS neutron data in the vicinity of the South Pole is simulated to obtain bounds on the C02 thickness-density 2 17 product covering the residual south polar cap. A lower bound of 150 g/cm is found, or -1.5 x 10 g of C02.

Sanin A. B. Mitrofanov I. G. Kozyrev A. S. Litvak M. L. Tretyakov V. Smith D. E. Zuber M. T. Boynton W. V. Saunders R. S. The Enhancement of Water Ice Content in the Local Area Northeast from Arcadia Planitia: Evidence from Neutron Data from HEND (Mars Odyssey) and Elevation from MOLA (MGS) [#1111] The possible correlations are searched between epithermal neutron flux observed by HEND (Mars Odyssey) and elevation and C02 snow depth measured by MOLA (MGS).

Ivanov M. A. Litvak M. L. Mitrofanov I. G. Boynton W. Saunders R. S. Medusae Fossae-Elysium Region, Mars: Depression in the HEND!Odyssey Map of Mars Epithermal Neutrons [#1105] The data from the HEND instrument (Mars Odyssey) show a distinct depression in the flux of epithermal neutrons in the Medusae Fossae-Elysium Region. The depression is likely due to bound water and has been formed late in the geologic history of Mars.

Moore K. R. Tokar R. L. Elphic R. C. Lawrence D. J. Barraclough B. L. Funsten H. O. Remote Sensing of Water in the Valles Marineris Using Mars Odyssey Neutron Data [#1960] This study examines the epithermal neutron data from neutron spectrometer in Mars Odyssey Gamma Ray spectrometer for signatures of water in the Valles Marineris.

Kuzmin R. O. Mitrofanov I. G. Litvak M. L. Boynton W. V. Saunders R. S. Mars: Detaching of the Free Water Signature (FWS) Presence Regions on the Base of HENDIODYSSEY Data and Their Correlation with Some Permafrost Features from MOC Data [#1369] Results of detaching of the free water signature areas on Mars on the base of the REND/ODYSSEY data and analyses of their correlation with the polygonal terrains distribution are presented.

Basilevsky A. T. Litvak M. L. Mitrofanov I. G. Boynton W. Saunders R. S. Search for Chemically Bound Water in the Surface Layer ofMars Based on HEND/Mars Odyssey Data [#1088] The contents of chemically bound water in the majority of ice-free areas of Mars are higher than at the Viking/Pathfinder sites. Low epithermal neutron flux in Terra Arabia and SW of Olympus is due to even higher contents of chemically bound water.

Prettyman T. H. Feldman W. C. Boynton W. V. McKinney G. W. Lawrence D. J. Mellon M. T. Atmospheric Corrections for Neutrons Reveal Variations in Surface Composition in the Tharsis Region [#1950] Maps of neutron count rates measured by the neutron spectrometer on Mars Odyssey are corrected for spatial variations in atmospheric thickness to reveal the composition of the surface. Corrected maps of Tharsis are presented and interpreted.

34th LPSC Program ______45 Kim K. J. Drake D. M. Reedy R. C. Numerical Simulations of Cosmogenic Neutron Production and Transport in Planetary Swfaces [#1532] The code MCNPX was used to numerically simulate and to understand the physical processes in the interactions of cosmic rays with solar-system matter. The energy and depth distributions of neutrons in Mars and an L-chondrite were calculated.

Smith D. M. Estimating the Vertical Distribution of Near-Surface Ice Using the Comptonized Continuum from the Neutron-Capture Gamma-Ray Line [#1530] The 2.223 MeV gamma-ray line from neutron capture on hydrogen will Compton scatter in any overlying material before reaching an orbiting spacecraft such as Mars Odyssey. We discuss the use of the observed Compton continuum to constrain the depth profile of the near-surface ice.

LeeK. T. Andersen V. Atwell W. Cleghorn T. Cucinotta F. Pinsky L. Saganti P. Turner R. Zeitlin C. Heavy Ion Flux Comparison of MARIE and ACEICRIS Instruments [#1876] We compare the data from Martian orbit to data from L1 to determine if any radial dependance of solar modulation can be detected.

Slavney S. Arvidson R. E. Guinness E. A. 2001 Mars Odyssey Science Data Archives [#1431] In its first two data releases the 2001 Mars Odyssey Mission has delivered more than 200 gigabytes of data, which are now available online. The new PDS-D service provides the capability to search for and download user-selected data products.

Crombie M. K. Harshman K. P. McArthur G. K. Shinohara C. Boynton W. V. 2001 Mars Odyssey Gamma-Ray Spectrometer Science Data Products [#1671] The Mars Odyssey Gamma-Ray Spectrometer is a suite of instruments working together to collect data that will permit mapping of elemental concentrations on the surface of Mars. These data are used to produce science data products for the PDS archives.

Murray K. C. Christensen P.R. Mehall G. L. Gorelick N. S. Harris J. C. Bender K. C. Cherednik L. L. 2001 Mars Odyssey THEMIS Data Archive [#1363] The 2001 Mars Odyssey Thermal Emission Imaging System (THEMIS) standard data archive includes raw, calibrated, and derived images generated from the infrared and visible observations. Data is currently available online.

Gorelick N. S. Weiss-Malik M. Steinberg B. Anwar S. JMARS: A Multimission Data Fusion Application [#2057] Arizona State University has developed a software package that provides seamless integration across multiple Mars datasets including Odyssey THEMIS, MGS-MOC and MGS-MOLA.

Red Hot Lava: Mars Volcanism

Rawling E. J. Mitchell K. L. Wilson L. Pinkerton H. Recent Silicic Lava Flows on Olympus Mons? [#1337] We have identified many recent leveed volcanic flows on the flanks of Olympus Mons, consistent with silicic magmas supplied as high mass flux through laterally emplaced dykes.

Bleacher J. E. Greeley R. Shield Volcano Slope Distributions: An Approach for Characterizing Martian Volcanic Provinces [#1794] Hawaiian shield volcano slope distributions are presented. Trends compare favorably with some martian volcanoes suggesting similar formational processes. The results can be used as an approach for characterizing martian volcanic provinces.

46 ______~34th LPSC Program Lucchitta B. K. Volcanic Features in Valles Marineris Reexamined with MGS Data [#1752] Using MOC narrow-angle images and MOLA data, many dark deposits are confirmed as of volcanic origin, as are light layers on top of adjacent plateaus. Late interior deposits surrounding older mesas, however, may have been emplaced by mass wasting from the mesas.

Chapman M.G. Lucchitta B. K. Skilling I. P. Smellie J. L. Thordarson T. Comparative Study of3-Dimensional Renderings of the Valles Marineris Interior Layered Deposits on Mars and Terrestrial Sub-lee Volcanoes in Iceland [#1917] A progress report of the current investigation into the interpretation that the Valles Marineris interior layered deposits (ILDs) are analogous to terrestrial sub-ice volcanic forms, such as tuyas and hyaloclastic ridges, by mapping the ILDs and studying analogs in Iceland.

Peitersen M. N. Zimbelman J. R. Christensen P.R. Rice J. W. Bare C. Effect of Levee and Channel Structures on Long Lava Flow Emplacement: Martian Examples from THEM IS and MOIA Data [#1492] The potential effects of channels and levee building on long lava flow emplacement are examined. Flow rheological models are constrained using geomorphometric data derived from THEMIS images of and MOLA profiles across Martian long lava flows.

Glaze L. S. Baloga S.M. Stofan E. R. Mouginis-Mark P. J. Shockey K. M. McColley S. Rheology Comparisons for Several Martian and Terrestrial Lava Flows [#1315] We compare lava flows in different volcanic settings on Mars, looking for correlations between modeling parameters, or systematic differences among volcanic provinces. This enables us to isolate and refine models of lava flow emplacement.

Anderson S. W. Glaze L. Stofan E. Baloga S. The Spatial Distribution of Lava Flow Surface Features on Earth and Mars [#1080] We examined the spatial distribution of tumuli, three different flows on Earth and Mars. Tumuli are randomly distributed resulting from formation above transient thermally-preferred pathways that change position over the growth period of the lobe.

Milazzo M.P. Keszthelyi L. P. McEwen A. S. Jaeger W. The Formation of Columnar Joints on Earth and Mars [#2120] We present a synthesis of several models used to model the formation of columnar jointed lava on the Earth. This model can be extended to Mars in order to estimate the amount of water involved in the creation of joints.

Fagents S. A. Baloga S. M. Simulations of Lahar Emplacement on Earth and Mars [#1788] We apply a mathematical treatment of lahar propagation to simulate flows over the topographies of Mt. Ruapehu, New Zealand, and Pavonis Mons, Mars.

Zolotov M. Yu. Martian Volcanic Gases: Are They Terrestrial-like? [#1795] Assimilation of crustal material on Mars could be a major factor that affected temperature, composition, and the oxidation state of volcanic gases. Effects of pressure, temperature, and oxidation state on speciation of volcanic gases were evaluated.

Zent A. P. H20-Silicate Microphysics in Ascending Volcanic Plumes on Mars [#1831] Adsorptive interactions between H20 and silicates in rising martian volcanic plumes can affect plume energetics, agglomeration and precipitation.

34th LPSC Program ______47 Morgan J. K. McGovern P. J. Discrete Element Simulations of Volcanic Spreading: Implications for the Structure of Olympus Mons [#2088] We test the hypothesis of concurrent landsliding and volcanic sliding on Olympus Mons, using the discrete element method. The resulting models compare favorably to morphologic features noted on Olympus Mons, suggesting the importance of volcanic spreading in this setting.

Mars Surface Composition from Infrared Spectroscopy

Ciccolella S.M. Moersch J. E. Spectroscopic Observations of Subresolved Targets: Applications to the MER Mini-TES and RAT Experiments [#1836] Methods to deconvolve the spectrum of a target that incompletely fills a spectrometer's field of view are explored. During MER, areas of Mars rocks will be abraded to expose a fresh surface. Spectra of this target will be subresolved by Mini-TES.

Bishop J. L. Minitti M. E. Lane M. D. Weitz C. M. The Influence of Glassy Coatings on Volcanic Rocks from Mauna Iki, Hawaii and Applications to Rocks on Mars [#1516] We have characterized yellow and orange glassy coatings on volcanic rocks for a study of rock coatings on Mars. Interesting spectral properties have been observed in the VIS/NIR and mid-IR regions; these are compared with MPF-IMP and TES data of Mars.

Minitti M. E. Weitz C. M. Lane M. D. Bishop J. L. Composition and Spectra of Several Hawaiian Rock Coatings [#1937] We conducted extensive chemical and spectral analyses of distinct coatings on five different Hawaiian basalts. The effects of coating chemistry, coating thickness and the substrate basalt on VISNIR and mid-IR spectral properties are addressed.

Gaddis L. R. Staid M. I. Johnson J. R. Titus T. N. Mineral Mapping in Valles Marineris, Mars: A New Approach to Spectral Demixing ofTES Data [#1956] We applied multiple endmember dernixing toTES data to determine the composition of geologic units in Valles Marineris. The goal is to map the compositions of VM dark deposits and layered units of the walls and interior deposits.

Hamilton V. E. Morris R. V. Thennal Emission Spectra ofAltered Tephras and Constraints on the Composition of Martian Dust [#1936] We have acquired IR spectra of unaltered and altered tephras for use in the interpretation ofMGS TES data. We examine correlations between H20 band strength and composition, and compare tephra spectra to a martian surface dust spectrum from TES.

Burt D. Adams P.M. Kirkland L. E. Herr K. C. First Airborne Thennal Infrared Hyperspectral Imaging of a Dry Lake: Site Geology and TESITHEMIS Interpretations ofMars [#1860] Surface texture affects spectral signatures, but TES/THEMIS lab targets have very restricted textures. We illustrate the looming gap between the lab and field spectral worlds, show real-world textural variety, and impacts on current interpretations.

Kirkland L. E. Keirn E. R. Herr K. C. Adams P.M. Burt D. McAfee J. M. First Airborne Thennallnfrared Hyperspectral Imaging of a Dry Lake: Real-World Data and TESITHEMIS Mars Interpretations [#1887] Will the foundation lab data used for TES/THEMIS interpretations correctly identify the mineral deposits at Bristol Dry Lake? A hallmark of this work is the collaboration of specialists in field geology and field spectroscopy.

48 34th LPSC Program McSween H. Y. Jr. Hamilton V. E. Hapke B. W. Mineralogy of Martian Atmospheric Dust Inferred from Spectral Deconvolution of MGS TES and Mariner 9 IRIS Data [#1233] Deconvolution of TES spectra from martian dust storms suggests the presence of framework silicates (plagioclase and zeolite), possibly with gypsum and pyroxenes. Fits to IRIS spectra are poor and suggest problems in applying optical constants.

Edmonds J. L. Robinson M.S. New Mariner 6 and 7 Mosaics of Mars: Clues About Time Variable Suiface Features [#1436] Reprocessed data from Mariner 6 and 7 (1969) provide a valuable timestep with which to examine large scale surface processes on Mars. Mechanisms responsible for variations in albedo features are discussed in the context of this and other data.

Farrand W. H. Discrimination of Hydrovolcanic Tephras from Volcanic and Non- Volcanic Backgrounds in Hyperspectral Data of Pavant Butte and Tabernacle Hill, Utah: Relevance for Mars [#1457] Airborne hyperspectral image data were used to examine the Pavant Butte tuff cone and Tabernacle Hill tuff ring in the Black Rock Desert of Utah. Palagonitized and poorly palagonitized tephras were successfully discriminated from volcanic and non- volcanic backgrounds.

Johnson J. R. Staid M. I. Titus T. N. Gaddis L. Thermal Emission Spectrometer Mosaics of Impact Craters: Progress on Shocked Plagioclase Detections [#2041] We are using a combination of mineral laboratory spectra and spectra of experimentally shocked feldspars to deconvolve the TES spectra. We find that locations of shocked feldspar detections are not restricted to ejecta near large craters.

Stockstill K. R. RuffS. W. Moersch J. E. Baldridge A. Farmer J. TES Hyperspectral Mapping of Proposed Paleolake Basins in the Aeolis Quadrangle of Mars: A Search for Aqueous Minerals [#1793] This study uses TES hyperspectral data to search for spectral features of aqueous minerals within previously proposed paleolake basins within the Aeolis Quadrangle of Mars. Thus far, no aqueous minerals have been detected in these basins.

GraffT. G. Morris R. V. Christensen P.R. Lunar Mare Basalts as Analogues for Martian Volcanic Compositions: Evidence from Visible, Near-IR, and Thermal Emission Spectroscopy [#1632] The lunar mare basalts potentially provide a unique sample suite for understanding the nature of basalts on the martian surface. With visible, near-IR, and thermal emission spectroscopy we have examined 15 lunar samples as Mars analogues.

Antonenko I. Cloutis E. A. Analysis ofMathematical Models for Reflectance Absorption Spectra [#2095] We analysed how well different mathematical functions model reflectance absorption spectra. A modified guassian model often worked best. Some corelation between model and peak width was noted.

Gendrin A Erard S. Phobos's Mineralogy Reinvestigated. Application of the Wavelet Transform to the Analysis of ISM/Phobos2 Infrared Spectra [#1273] The reinvestigation of ISM infrared spectra of Phobos leads to the conclusion that the mineralogical composition of the satellite comprises olivine in the whole observed area, while orthopyroxene is detected only in some localised regions.

34th LPSC Program ______49 Poulet F. Erard S. Gendrin A Modelling of Mineral Mixture Reflectance Spectra [#1590] The purpose of the paper is to use the Shkuratov scattering theory to determine the type of mixture, the relative proportions, and the grain sizes of components (minerals) of laboratory common geologic mineral mixtures given reflectance spectra of the endmembers only.

Mars: Surface, Weathering, and Hydrothermal Alteration

Leask H. J. Wilson L. Heating and Cooling of Rocks on Mars: Consequences for Weathering [#1320] We show that rates of surface and near-surface rock temperature variation on Mars due to sudden obscuration of the sun by topographic obstacles, especially at high latitudes, may be large enough to cause mechanical weathering by exfoliation or granular disintegration.

Nelson M. J. Newsom H. E. Can Low Water/Rock Hydrothermal Alteration of Impact Materials Explain the Rock Component of the Martian Soil? [#1780] In contrast to ocean floor hydrothermal alteration, low water/rock alteration studied in terrestrial impact craters can result in the retention of Fe, and erosion of such altered material could contribute to the rock component of the martian soil.

Rao M. N. McKay D. S. Characterization ofMartian Soil Fines Fraction in SNC Meteorites [#1252] Martian soil fines are found in impact melt glasses in shergottite meteorites and their charecteristics are described in detail. Also we have identified the secondary alteration product of acid sulfate weathering on Martian young volcanic terraines.

Golden D. C. Ming D. W. Morris R. V. Laboratory Hydrothermal Alteration of Basaltic Tephra by Acid Sulfate Solutions: An Analog Process for Martian Weathering [#1782] Acid sulfate alterations of basaltic tephra was studied using two hydrologic systems: (a) a closed system, and (b) an open system. The open system mimics a Mars-like weathering process yielding putative Mars surface sulfate minerals.

Ming D. W. Lauer H. V. Jr. Golden D. C. Morris R. V. The Search for Water and Other Volatile-Bearing Phases on Mars: Mauna Kea Volcano as an Analog [#1880] We have characterized the thermal and evolved gas behaviors of volatile-bearing phases in Mauna Kea volcano samples as an analog materials and geologic processes for Mars surface materials.

Hurowitz J. A McLennan S. M. Lindsley D. H. Schoonen M. A A Hydrothermal Alteration of the Martian Crust: An Experimental Approach [#1781] The results presented herein represent the first in a series of experiments aimed at assessing the role that hydrothermal systems might play as a source of secondary minerals at the Martian surface.

Mars Tectonics and Geophysics: From Holes to Poles

Vidal A Mueller K. Golombek M. P. Axial Surface Mapping of Wrinkle Ridges on Solis Planum, Mars from MOLA Topography: Constraints on Subsurface Blind Thrust Geometry [#1125] We undertook axial surface mapping of selected wrinkle ridges on Solis Planum, Mars in order to assess the subsurface geometry of blind thrusts proposed to exist beneath them. This work builds on previous work that defined structural families of wrinkle ridges based on their surface morphology.

50 ______.34th LPSC Program Matney R. N. Schultz R. A. Radial Variations in Lithospheric Properties in Northeast Tharsis: First Results [#1463] For the first phase in our quantification of Tharsis, an MGS-referenced data set of normal faults and grabens from a radial slice of Tharsis is created to provide a window into thermal, mechanical, and tectonic properties as a function of time.

Kilby R. E. Herrick R. R. Analysis of Unusual Fault Structures in Terra Cimmeria, Mars [#1298] In the central Terra Cimrneria region of the Southern Highlands of Mars is a set of linear scarps not clearly associated with known tectonic provinces. The set displays a NE-SW trend for over 1500 kilometers forming multiple horsts and grabens.

Wyrick D. Y. Ferrill D. A. Sims D. W. ColtonS. L. Distribution, Morphology and Structural Associations of Martian Pit Crater Chains [#2025] Mapping of pit crater chains on Mars using MOC images show distribution patterns and morphology that indicate structural association with dilational normal faults.

Hammer J. E. Brachfeld S. Rutherford M. J. An Igneous Origin for Martian Magnetic Anomalies? [#1918] Constant-rate cooling experiments were run at 1-bar using Fe- rich basalt to ascertain whether conditions necessary for crystallization of minerals retaining intense RM are consistent with models for the generation of the Martian magnetic anomalies.

Jurdy D. M. Stefanick M. Mars Magnetic Data: The Impact of Noise on the Vertical Extrapolation of Fields and Methods of Suppression [#1423] Fourier analysis of Mars magnetic data along 180 shows an exponential decrease in amplitudes. Removal of noise and vertical extrapolation suggests a major source near 50 S. The magnetization pattern does not require reversed lineations, but does not exclude them either.

Boutin D. B. Arkani-Hamed J. A. H. Paleomagnetic Pole Position of Mars Revisited [#1884] We model some small, isolated magnetic anomalies of Mars using the aero braking and science phase data. Many of the new paleomagnetic pole positions agree with the old positions. We discuss the implications on the crustal magnetization and the polar wandering of Mars.

Richmond N. C. Hood L. L. Paleomagnetic Pole Positions of Mars [#1721] Mapping and aerobraking phase Mars Global Surveyor magnetometer data are used to calculate paleomagnetic pole positions of Mars for several isolated magnetic anomalies.

Redmond H. L. KingS. D. The Effect of Temperature-dependent Viscosity on Mantle Convection: Applications Towards the Tharsis Rise [#1810] We will present numerical calculations of plumes in a spherical axisymmetric geometery. We vary Rayleigh number, rate of internal heating and rheology. We use topography and areoid as constraints.

SingerS. F. Mars Thermal Evolution: Aided by Tidal Dissipation? [#1146] We hypothesize that tidal dissipation caused by a disappeared satellite could account for the energy necessary to melt the planet.

34th LPSC Program ______51 Mars Atmosphere and Climate

Buhler C. R. Calle C. I. Nelson E. Electrical Breakdown in a Martian Gas Mixture [#1765] Experimental measurements of the Paschen breakdown of a Mars gas mixture is compared with that of pure carbon dioxide. Results indicate that the minimum in the breakdown curves are different between the two gases.

Hale A. S. Tamppari L. K. Christensen P. R. Smith M. D. Bass D. Pearl J. C. Water Ice Clouds in the Martian Atmosphere: A Comparison of Two Methods [#1657] We examine Martian water ice clouds, specifically the aphelion cloud belt, with both Viking IRTM and MGS TES data, and compare the results of two different methods for cloud retrieval.

Nakamura T. Tajika E. Climate Change of Mars: Effects of Obliquity Changes [#1286] We will present important effects of the obliquity variations of Mars on the Martian climate.

Abe Y. Abe-Ouchi A. The Effect of Obliquity and Surface Condition on the Freezing Condition of a Planet: Implications for Paleo-Mars Climate and Habitable Condition [#1617] The freezing condition suggests that (1) Mars may have experienced the period while only the low latitude area is covered by permanent snow, and (2) a wet land planet without oceans has better chance of unfrozen climate than an aqua planet with oceans.

Kereszturi A. The Role of Subsurface Melting in the Global Climate Cycles on Mars [#1533] We present a model where the pressure driven compaction can cause subsurface melting in the ice filled pores and this can take part in the global climate cycles on Mars.

Mars Geologic Mapping

Skinner J. A. Jr. Tanaka K. L. How Should Planetary Map Units be Defined? [#2100] A geologic mapping approach that classifies materials into either rock-stratigraphic or allostratigraphic units may facilitate more meaningful stratigraphic divisions and improve the objectivity of geologic maps.

Frey H. V. Frey E. L. Hartmann W. K. Tanaka K. L. T. Evidence for Buried "Pre-Noachian" Crust Pre-Dating the Oldest Observed Surface Units on Mars [#1848] MOLA data provide strong evidence for a "pre-Noachian" crust under the oldest surface units on Mars. A common total (visible+ buried) crater retention age for several Noachian units may indicate crater saturation or the age of original crust.

KolbE. J. Tanaka K. L. Skinner J. A. A New Mapping Approach for Highland Materials in the South Polar Region of Mars [#2105] In this abstract we discuss and present results of applying a new mapping approach to the highland plains materials of Mars.

Mest S. C. Crown D. A. Geology of Crater Millochau, Terra Tyrrhena Region of Mars [#1942] The floor of crater Millochau (Terra Tyrrhena, Mars) displays geologic terrains that appear to have formed by a complex sequence of infilling to form layered deposits, their collapse and erosion, and subsequent modification by eolian processes.

52------34th LPSC Program Raitala J. Basilevsky AT. Geotraverse Through the Terra Arabia Area of Low Epithermal Neutron Flux [#1147] Analysis of MOC images over low epithermal neutron flux anomaly of Terra Arabia reveals that it differs noticeably from its neighborhood neither in amount of fluvial channels and layered deposits, nor in thickness and apparent surface mantle texture.

Presley M.A. RuffS. W. Nature and Origin of Sedimentary Materials in Western Arabia [#2110] We propose that the materials composing Western Arabia are the same as in the deposits within crater basins. This infers that a more regional process than individual crater lakes must have been active.

Maps 'n Bits: Cartography, Data Access, and Archiving

Rosiek M. R. Howington-Kraus E. Hare T. M. Redding B. L. Mars Transverse Mercator ( MTM) Map Series Updated with Planetocentric Grid [#1371] The Mars Transverse Mercator (MTM) map series has been updated to use planetocentric coordinates with positive east longitude as the primary grid with a secondary grid showing the planetographic coordinates with positive west longitude.

Archinal B. A Kirk R. L. Duxbury T. C. Lee E. M. Sucharski R. Cook D. Mars Digital Image Model2.1 Control Network [#1485] We describe the creation of the Mars global control network to be used for the Mars Digital Image Model (MDIM) 2.1 mosaic. This network is much improved over past such networks, and should provide global horizontal accuracy at the-200m level.

Neumann G. A Lemoine F. G. Smith D. E. Zuber M. T. The Mars Orbiter Laser Altimeter Archive: Final Precision Experiment Data Record Release and Status of Radiometry [#1978] A final release (Version L) of the MOLA PEDR's has been submitted to the PDS. Additional gridded products are forthcoming, at resolutions of up to 512 pixels per degree in polar regions. Radiometry data is also being archived.

Delacourt C. Baratoux D. Gros N. Allemand P. Online Mars DEM Derived from MOLA Profiles [#1346] This paper presents an application server allowing to compute online DEM from the MOLA data. The parameters can define location and resolution of the needed DEM and dow load topographic maps, quality map for the interpolation and individual MOLA measurements over the area of interest.

Gulick V. C. Deardorff D. G. Mars Data Visualization and EIPO with Marsoweb [#2081] Marsoweb is a collaborative web environment that has been developed for the Mars research community to better visualize and analyze Mars orbiter data. Its goal is to enable online data discovery by providing an intuitive, interactive interface to Mars data.

Okamoto K. Suzuki Y. Marsv for Plan 9 [#1483] A new Mars image and MOLA data processing system was developed for GUI based Plan 9 system. We can overlay the Mars MOLA grid data onto Viking ISIS processed cube image, and make contour map and read altitude at any point pointed by mouse.

34th LPSC Program ______53 Hare T. M. Tanaka K. L. PIGWAD: Continuing to Offer GIS Services to the Planetary Community [#1974] Planetary Interactive GIS on the Web Analyzable Database, or PIGW AD, continues to grow with the GIS Internet technologies and will be an exciting and fundamental tool for planetary researchers to use as the functionality continues to increase.

Plesko C. Brumby S. Asphaug E. Automated Development of Feature Extraction Tools for Planetary Science Image Datasets [#1758] We explore development of feature extraction algorithms for Mars Orbiter Camera narrow angle data using GENIE machine learning software. The algorithms are successful at detecting craters within the images, and generalize well to a new image.

Hughes J. S. Lavoie S. Wilf J. Joyner R. Crichton D. PDS-D- The Planetary Data System Distribution Subsystem [#1496] The Planetary Data System (PDS) Distribution Subsystem (PDS-D) provides on-demand, web-based search, retrieval, and distribution of science data products from a loosely coupled collection of distributed heterogeneous data repositories that comprise the PDS archive.

Eichhorn G. Accomazzi A. Grant C. S. Kurt M. J. Henneken E. A. Murray S. S. Expanded Citations Database in the NASA ADS Abstract Service [#1949] The ADS provides free world-wide on-line access to over 3.2 million abstracts and over 2.1 million scanned pages of the astronomical and planetary literature plus over 7.7 million links to other relevant on-line information at http://ads.harvard.edu.

I'll Take Meteoritic Potpourri for $200, Please

HarveyR. P. The Broken Belt: Meteorite Concentrations on Stranded Ice [#1194] The horizontal movement of ice is a consistent feature of many accepted meteorite concentration mechanisms. Recent findings suggest, however, that iceflow is minimal at some important meteorite stranding sites, with massive deflation of stranded ice creating the concentration we see today.

~leek Ph. R. Baur H. Schmitz B. Wieler R. Cosmic-ray Exposure Age of a 480 Myr Old Fossil Meteorite by Noble Gas Analyses of Relict Chromite Grains [#1751] Cosmogenic He and Ne in chromites from a fossil meteorite in a marine limestone (480 Ma) were detected. He and Ne exposure ages agree at -0.3 Myr, suggesting neglible loss of cosmogenic He and Ne.

Karner J. M. SuttonS. R. Papike J. J. Shearer C. K. Newville M. Oxidation State of Vanadium in Glass and Olivine from Terrestrial and Martian Basalts: Implications for Oxygen Fugacity Estimates [#1998] Preliminary results using XANES to determine the oxidation state of V, and thus oxygen fugacity of planetary basalts.

Meier A. Akridge D. G. Akridge J. M. C. Batchelor J.D. Benoit P. H. Brewer J. DeHart J. M. Keck B. D. Lu J. Schneider D. M. Sears D. W. G. Symes S. J. K. Zhang Y. Cathodoluminescence Color Indices as a Parameter for Measuring Petrologic Changes in Meteorites [#1037] Cathodoluminescence (CL) is the emission of light during exposure to an electron beam. Here, we discuss using the CL properties of meteorites to determine their petrologic type, with emphasis on CM, CO, ordinary and enstatite chondrites, and achondrites.

54 ______.34th LPSC Program Smith D. L. Ernst R. E. Herd R. Magnetic Susceptibility of Stony Meteorites from the National Meteorite Collection of Canada [#1939] Using magnetic susceptiblity measurements to characterize stony meteorites from the National Meteorite Collection of Canada.

Mathew K. J. Marti K. Levskii L. K. 126Xe Excesses: Monoisotopic Anomalies in Regolith Samples? [#1985] We present new Xe isotopic signatures ofPesyanoe regolith samples which document excesses of 126Xe and we explore the possibility that it formed by low-energy reactions on transient Te-rich coatings.

WoodlandS. J. Rehhimper M. Lee D-C. Halliday AN. High Precision Ag Isotopic Measurements of Low Pd/Ag Meteorites [#1621] Ag isotopic compositions of different chondrite groups and the iron meteorite Canyon Diablo are the same within error as NISTSRM 978a. This has important implications regarding initial Ag compositions and element fractionation within the accretion disk.

Fehr M. A Rehkamper M. Porcelli D. Halliday A. N. Homogeneity of Tellurium Isotopes in Chondrites, Leachates ofAllende and Canyon Diablo [#1655] 126Sn decays to 12~e with a half-life of 0.235 Myrs. Te isotopes were measured in ordinary chondrites, enstatite chondrites, iron meteorites and leachates of Allende by MC-ICPMS and were all within error identical to the JMC Te standard. van Niekerk D. Modal Analysis and Phase Identification in Meteorite Thin Sections Using "Freeware" for PC [#2015] Modal analysis and phase identification in meteorite thin sections is demonstrated to be easily accessible to everyone through the use of free software. A technique developed at the University of Hawaii is applied to this program, and results of current and previous studies are compared.

Thompson C. K. Slater V. P. Stockstill K. R. Anand M. Nettles J. Milam K. Cahill J. Taylor L. A An Evaluation of the Igneous Crystallization Programs- MELTS, MAGPOX, and COMAGMAT Part 1: Does One Size Fit All? [#1881] This is Part I of a study evaluating three models used to simulate magma crystallization (MELTS, MAGPOX, and COMAGMAT). No single program is a best fit for all melt compositions.

Slater V. P. Thompson C. K. Nettles J. Milam K. Stockstill K. R. Cahill J. Anand M. Taylor L. A An Evaluation of the Igneous Crystallization Programs- MELTS, MAG POX, and COMAGMAT Part II: Importance of Magmatic f02 [#1896] This is Part II of a study to evaluate three crystallization models (MELTS, MAGPOX, and COMAGMAT) using three rock compositions at threej02s. Care should be taken when choosing a model as no single model is best suited for every composition or }02•

Experiments: Rocks Made to Order

Righter K. Campbell A J. Humayun M. Experimental Determination of Spinel/Melt, Olivine/Melt, and Pyroxene/Melt Partition Coefficients for Re, Ru, Pd, Au, and Pt [#1383] Spinel/melt, olivine/melt, and pyroxene/melt partition coefficients for several highly siderophile elements have been measured in experimental samples. The results are applied to terrestrial komatiitic basalts, martian shergottites, and lunar basalts.

Dwarzski R. E. Herd C. D. K. Cobalt and Nickel Partitioning into Planetary Olivine [#1625] We examined the effect of temperature, bulk composition, and oxygen fugacity on the partitioning of Co and Ni into olivine by crystallization experiments. We found that temperature has the greatest effect on the partitioning of these trace elements.

34th LPSC Program ______55 Stimpfl M. Ganguly J. Hervig R. Ca and Mg Tracer Diffusion in Diopside: Experimental Determination and Applications to Cooling History of Planetary Samples [#1497] We report new data for Ca-Mg diffusion in diopside and discuss their potential implications for the determination of cooling history of planetary samples. In particular, a revised cooling rate for Moore County shows that the burial depth computed in previous studies was largely overestimated.

Toppani A Libourel G. Robert F. Ghambaja J. Zimmermann L. Condensation Experimental Set-up Using Pulsed-Laser Evaporation: Preliminary Results [#1790] In order to better understand condensation processes in the primitive solar nebula, we have set up a new apparatus which allows to perform condensation experiments at high temperature and low vacuum from refractory complex gases.

Kenkmann T. Walther K. Frischbutter A Scheffztik C. Eichhorn F. Daymond M. R. Strain Scanning Across a Shock-deformed Quartzite!Dunite Interface Using Neutron and Synchrotron Radiation [#1374] This is the first report of residual strain measurements in experimentally shocked rocks (quartzite, dunite). The present study is devoted to obtain a better understanding of shock related processes across planar interfaces.

CCR: Carbonaceous Chondrite Revival

Ivanov A Zolensky M. E. The Kaidun Meteorite: Where Did It Come From? [#1236] The presence of alkaline-enriched igneous lithologies within Kaidun suggests an origin on Phobos.

Hiroi T. Kanno A Nakamura R. Abe M. lshiguro M. Hasegawa S. Miyasaka S. Sekiguchi T. Terada H. Igarashi G. The Tagish Lake Meteorite as a Possible Sample from aT or D Type Asteroid [#1425] The Tagish Lake meteorite has a very similar Vis-NIR reflectance spectrum to the Tor D asteroids. Especially, among those asteroids whose 3-micron bands are measured, 308 Polyxo has the best similarity to Tagish Lake, while a C asteroid 511 Davida may have similar hydrous minerals to Tagish Lake.

Boctor N. Z. Kurat G. Alexander C. M. O. D. Sulfide-Oxide Assemblage in Tagish Lake Carbonaceous Chondrite [#1705] Oxide and sulfide minerals from Tagish Lake are precipitates from aqueous fluids. Sulfide precipitation continued after that of oxides. Both oxides and sulfides formed at oxygen and sulfur fugacities close to those of the iron-magnetite- pyrrotite buffer.

Greshake A Flynn G. J. Krot A. N. Keil K. Chemical Composition of Fine-grained Rims in the Tagish Lake Carbonaceous Chondrite [#1559] The major, minor and moderately volatile element compositions of chondrules, matrix and dust rims in Tagish Lake were determined. Significant differences in composition exclude formation of the rims by alteration of the enclosed chondrules.

Krot AN. Petaev M.l. Yurimoto H. Low-Ca Pyroxene in Amoeboid Olivine Aggregates in Primitive Carbonaceous Chondrites [#1441] We report a discovery of low-Ca pyroxene in AOAs from CV, CR, CM, and ungrouped carbonaceous chondrites Adelaide 16 17 18 16 and Acfer 094 that formed by reaction between 0-rich forsterite (8 · 0- -40%o), and SiO gas that was depleted in 0 (017,180- O%o).

56 ______.34th LPSC Program Komatsu M. Miyamoto M. Mikouchi T. Kogure T. Krot A. N. Keil K. Examination of High Temperature Annealing ofAmoeboid Olivine Aggregates: Heating Experiments of Forsterite and Anorthite Mixtures [#1521] Comparative studies of heating experiments with mineralogy of amoeboid olivine aggregates suggest that some Al-diopside in amoeboid olivine aggregates can be produced by a small degree of melting of forsterite and anorthite.

Zega T. J. Garvie L.A. J. Buseck P. R. Electron Energy-Loss Spectroscopy (EELS) of Fe-bearing Sheet Silicates in em Chondrites [#2089] Electron energy-loss spectra indicate that a chrysotile-like phase in the matrices and fine-grained rims of CM chondrites 3 contains Fe +.

Velbel M.A. Tonui E. K. Zolensky M. E. Compositions of Partly Altered Olivine and Replacement Serpentine in the CM2 Chondrites QUE93005 and Nagoya: Implications for Scales of Elemental Redistribution During Aqueous Alteration [#1611] Compositional relations between olivines and replacement serpentines in QUE93005 and Nogoya favor homogeneity of aqueous solutions on >cm-dm scales, and alteration after assembly of the meteoroid parent and major episodes of brecciation and mixing.

lvanova M.A. Nazarov M.A. Clayton R.N. Mayeda T. K. Taylor L.A. Sayh Al Uhaymir 085, CV3 Chondrite: Mineralogical Links with CK Chondrites [#1226] The newly found meteorite SaU 085 appears to be a breccia consisting of major contributions of material from oxidized subgroups, some CK material, and minor material from the reduced subgroup of CV chondrites.

Menzies O. N. Bland P. A. Cressey G. Berry F. J. An X-Ray Diffraction Study of Inclusions in Allende Using a Focussed X-Ray MicroSource [#1734] We analysed samples ofDI, CAl, and matrix from Allende using an XRD system that employs a high-brightness X-ray generator. With appropriate standards it will be possible to quantify mineral abundance in milligram samples of meteoritic material.

Plagge M. Sudek Ch. Ott U. Selenium During Stepwise Dissolution ofAllende -An Exploratory Study [#1217] Abundance and isotopic composition of Se have been determined during stepwise dissolution of Allende. From preliminary results we conclude that there is no evidence for mass-independent isotopic effects larger than -1 %o.

Bullock E. S. Gounelle M. Grady M. M. RussellS. S. Different Degrees ofAqueous Alteration in Sulphides Within the Cll Chondrites [#1542] Sulphides in four different en chondrites were analysed, to evaluate their composition, texture and morphology. The results reinforce the view that en chondrites could be divided into two subgroups, based on their level of aqueous alteration.

Lerner N. R. Cooper G. W. Imino Acids in the Murchison Meteorite: Evidence of Strecker Reactions [#2037] Imino acids were identified in the Murchison meteorite. These compounds lend support to the theory that Strecker reactions created at least some of the observed meteoritic amino acids and hydroxy acids.

Remusat L. Derenne S. Robert F. Conventional and TMAH Assisted Pyrolysis on the Insoluble Organic Matter of Orgueil and Murchison [#1230] The pyrolysates obtained with and without TMAH from the insoluble organic matter of Orgueil and Murchison meteorites were compared. TMAH allowed to reveal ester linkages between the aromatic units of the macromolecular network.

34th LPSC Program ______57 Binet L. Gourier D. Derenne S. Robert F. Ciofini I. New Extraterrestrial Signature of the Insoluble Organic Matter of the Orgueil, Murchison and Tagish Lake Meteorites as Revealed by Electron Paramagnetic Resonance [#1662] Electron Paramagnetic Resonance (EPR) of the insoluble organic matter (I OM) of three chondrites revealed heterogeneously spread radicals including diradicaloids. These features not observed in terrestrial kerogens appear as an extraterrestrial signature of the chondri tic I OM.

Dragoi D. Kulleck J. Kanik I. Beegle L. W. Chiral Determination of Amino Acids Using X-Ray Diffraction of Thin Films [#1682] The ability of X-Ray diffraction to identify organic molecules and determine their chirality. Differences in diffraction patterns which are dependent upon the Ph levels of solution when crystallization takes place will be explored.

Gardner K. Li J. Dworkin J. Cody G. D. Johnson N. Nuth J. A. III A First Attempt to Simulate the Natural Formation of Meteoritic Organics [#1613] Amorphous iron silicates are used as to convert CO, N2 and H2 to complex hydrocarbons on the surfaces of the grains at 675K, 775K and 875K. Samples of these grains are then either vacuum annealed at 875K and 975K or hydrated at 300K or 350K. The resultant organics are analyzed via pyrolysis GC-MS.

Chondrules

Murray J. Boesenberg J. S. Ebel D. S. Unambiguous Voids in Allende Chondrules and Refractory Inclusions [#1999] Void space can be caused by thin section preparation. Three-dimensional tomographic analysis, prior to sectioning, shows that several very different types of voids are abundant in Allende meteorite inclusions. Formation models are proposed for each type.

Nettles J. W. Le L. Lofgren G. E. McSween H. Y. Jr. Dynamic Crystallization Experiments on LEW97008: Experimental Reproduction of Chondroid Textures [#1823] Samples of LEW97008 were heated to modest temperatures ( 1250° -1450°C) to document the effects of low degrees of partial melting on chondrule textures. The results look very much like porphyritic chondrule textures.

Jabeen I. Hiyagon H. Oxygen Isotopes in Isolated and Chondrule Olivines of Murchison [#1551] We performed in situ 0-isotope analyses of isolated olivine grains and chondrule olivines from Murchison. Mg-rich isolated grains are 0-isotopically different from Mg-rich chondrule olivines and Fe-rich olivine grains, suggesting a separate origin.

Hertz J. Ebel D. S. Weisberg M. K. Tomographic Study of Shapes and Metal Abundances of Renazzo Chondrules [#1959] Analysis of 3-dimensional tomographic data for three Renazzo chondrules shows that 2-D thin section methods are inadequate to quantify "convolution index", grain sizes and distributions, or modal metal abundance, but 3-D methods are more promising.

Mullane E. RussellS. S. Gounelle M. Mason T. F. D. Iron Isotope Composition of Allende and Chainpur Chondrules: Effects of Equilibration and Thermal History [#1027] Petrologic and Fe-isotopic study of Allende & Chainpur chondrules indicate that precursor material, melting history and equilibration may play a crucial role in determining their Fe-isotope composition.

58 ______.34mLPSCProgram Ciesla F. J. Hood L. L. The Frequency of Compound Chondrules and Implications for Chondrule Formation [#1405] We have derived formulae for calculating the probability of identifying a compound chondrule through thin-section studies. We reinterpret previous studies and suggest that 5% of all chondrules are compounds.

Zieg M. J. Lofgren G. E. Crystal Size Distributions from Porphyritic Olivine Chondrules: Insights into Formation Conditions [#1384] We have used crystal size distributions to quantify and compare the textures of natural chondrules and experimental analogs. These comparisons provide evidence for a partial melting origin for many porphyritic olivine chondrules.

Miura H. Nakamoto T. A Shock-Wave Heating Model for Chondrule Formation: Mechanism to Detemzine Minimum Size ofChondrules [#1348] We report that chondrules formed through the shock-wave heating model have minimum size below which most chondrules vanish due to the evaporation. Our computational experiments indicate that this minimum size is about 1-10 microns.

Nakamoto T. Kita N. T. Tachibana S. Heating Energy Input Rate for Chondrule Forming Region and Its Evolution [#1323] A heating energy input rate decreasing exponentially with time may reproduce the age of chondrules in LL chondrites, which is estimated to distribute from 1 m.y. to 3 m.y. after CAI formation with a peak around at 2 m.y.

Rotenberg E. Amelin Y. Age Variations Among Ordinary Chondrites: U-Pb Chronology ofChondrules [#1902] We have continued our project of U-Pb dating of chondrules from ordinary chondrites. Some chondrules yield very precise dates, and the method continues to show promise for better understanding the thermal history of the chondrites.

Outer Body Experiences

Swindle T. D. Reedy R. C. Masarik J. Production Rates of Noble Gases in the Near-Surface Layers of Europa by Energetic Charged Particles and the Potential for Determining Exposure Ages [#1466] We calculate production rates for light noble gas isotopes in Europa by GCR and trapped jovian energetic particles. The production rates are comparable to or greater than lunar ones, making in situ measurements of surface exposure ages plausible.

Bradak B. Kereszturi A. Mud Volcanism as Model for Various Planetary Surface Processes [#1304] In this work we review our current knowledge on the two basic kinds of mud volcanism on Earth and their possible application to planetary environments. Mud volcanic processes differ from magmatic volcanism but realize under such physical factors which are present in many planetary bodies.

Mitri G. Geissler P. A Thermodynamical Model of the Icy Crust of Europa [#1759] We study the evolution of an ice shell on Europa and the response of a solid shell to heat changes. The aim is to determine the time scales for heating a subsurface ocean, melting and refreezing the icy crust, and initiating convection.

34th LPSC Program ______59 Spaun N. A. Phillips C. B. Analysis of Multispectral Galileo SSI Images of the Conamara Chaos Region, Europa [#1260] We quantitatively analyze the corrected and calibrated multispectral images of Europa's Conamara Chaos region to determine whether the white and red-brown material units, and their subsequent geologic processing, are endogenic or exogenic in nature.

Billings S. E. Kattenhorn S. A. Comparison Between Terrestrial Explosion Crater Morphology in Floating Ice and Europan Chaos [#1955] Similarities between the morphology of explosion craters in terrestrial sea ice and chaos regions on Europa lead us to examine the possibility that some chaos may be the result of impact events into Europa's ice shell.

Kereszturi A. Chaotic Terrains as Indicators of Crustal Thickness of Europa [#1550] Based on the size distribution of rafts in the chaotic terrains of Europa we had found that the original ice thickness could be about 2 krn.

Rodriguez Pascua M.A. Perez Lopez R. Prieto Ballesteros O. Kargel J. S. Tectonic and Fractal Analysis ofConamara Chaos Area (Europa, Jupiter): Strike Slip and Compressional Features in an Expansive Satellite [#1331] Two tectonic episodes are described in Conamara Chaos, both strike-slip regimes. Compressive structures due to horizontal movements have been recognized. Fractal analysis indicates that active faults are formed by re-activated and new-formed faults.

Collins G. C. Goodman J. C. Pierrehumbert R. T. Can Hydrothermal Plumes Melt Through Europa's Ice Shell? [#1430] Using an improved model to assess melting of Europa's ice shell, we find that total melt-through never occurs for reasonable values of sub-ice heat flux. Tens to hundreds of meters of ice always remain, making it difficult to form chaos terrain.

Patterson G. W. Head J. W. Crustal Spreading on Europa: Inferring Tectonic History from Triple Junction Analysis [#1262] Terrestrial techniques for triple junction analysis are applied to a set of junctions in the south polar region of Europa. Implications for relative spreading velocity, stability, and tectonic history are explored.

Fairen A. G. Ruiz J. Seas Under Ice: Stability of Liquid-Water Oceans Within Icy Worlds [#1139] Liquid water oceans within icy worlds may be a consequence of some factors affecting their thermal state, as stress- dependent ice viscosity, possible tidal straining, the effect of spherical geometry on small-size bodies, or surface insulating layers.

Prockter L. M. Pappalardo R. T. Comparison of Ridges on Triton and Europa [#1620] Ridges on both Triton and Europa exhibit an evolutionary sequence ranging from isolated troughs, through doublet ridges, to complex ridge swaths. Comparison of these ridges may provide insight into their formation on both satellites.

Stempel M. M. Pappalardo R. T. Barr A. C. Wahr J. Modeling Surface Stresses on Europa [#1481] We outline a method of surface stress modeling, in this case applied to Europa. Comparison of lineament orientation through time can be made to the stress patterns predicted by the model. The model will be made available to the public sector.

60 ______.34th LPSC Program McBee J. H. Hartmann D. Collins G. C. Strain Across Ridges on Europa [#1783] We have measured strain across some double ridges and complex ridge sets on Europa. Results show ridges with no strain, with slight extension, strike-slip motion, and some restraining bends showing compression.

Kattenhorn S. A. Secondary Fracturing of Europa's Crust in Response to Combined Slip and Dilation Along Strike-Slip Faults [#1977] Tail cracks at the ends of strike-slip faults on Europa indicate fault slip induces fracturing around faults. Comparison of crack geometries with linear elastic analytical models indicates that dilation must have accompanied the strike-slip motion.

DeRemer L. C. Pappalardo R. T. Manifestations of Strike-Slip Faulting on Ganymede [#2033] In Galileo high-resolution images of Ganymede's surface, we recognize ubiquitous evidence for strike-slip faulting, specifically: ( 1) en echelon structures, (2) strike-slip duplexes, and (3) offset pre-existing features.

Pappalardo R. T. Nimmo F. Giese B. Bader C. E. DeRemer L. C. Prockter L. M. Furrow Topography and the Elastic Thickness of Ganymede's Dark Terrain Lithosphere [#1511] We have estimated effective elastic thickness of dark terrain in Galileo Regio, Ganymede based on topographic profiles across furrows. We find effective elastic thicknesses -0.4 km, similar to analyzed areas alongside bright grooved terrain.

Dalton J. B. Spectral Properties of Hydrated Salts at Low Temperature: Implications for Europa Mission Spectrometer Design [#2072] Spectral behavior of hydrated salt minerals at cryogenic temperatures has been examined to constrain Europa mission spectrometer design.

Jarvis K. S. Barker E. S. Vilas F. Owen T. Shades of Grey: Iapetus' Secrets Aren't Just Black and White [#1988] New leading side spectra of Iapetus match one of three previous data sets. Latitude-based variation caused by polar ice contribution may be the cause for some of the differences seen. Older data are being evaluated to see if they too display this variation.

Moore C. Zhang J. Goldstein D. B. Varghese P. L. Trafton L. Modeling of Particulates and Condensates in Ia's Pele-type Volcanic Plumes [#2102] DSMC is used to model dust flow and condensate formation in Io's Pele-Type Plumes. It is found that particles up to 0.1 micron in diamter can reach the shock front.

Zhang J. Miki K. Goldstein D. B. Varghese P. L. Trafton L. Modeling of Radiation Above Ia's Surface from Pele-type Volcanic Plumes and Underground from the Conduit Wall [#2123] We discuss modeling of radiation above Io's surface from Pele-type volcanic plumes and underground from the conduit wall.

Davies A. G. Matson D. L. Veeder G. J. Johnson T.V. Blaney D. L. Lava Flows on Ia: Modelling Cooling After Solidification [#1460] Lava bodies cool faster after they have solidified. We have modeled post-solidification cooling of basaltic and ultramafic units of different thicknesses, and compare the results with Galileo observations of volcanism on Io.

34th LPSC Program ______61 Leone G. L. Wilson L. Links Between Depths of Magma Reservoirs and Volcanic Eruption Rates on /o [#1685] We review the volume eruption rates deduced for various volcanic events on Io, infer likely depths of magma reservoirs feeding the eruptions and show that the observed eruption rates can be sustained from sufficiently voluminous crustal reservoirs.

Hake M. D. Wilson L. Emplacement of the Prometheus Compound Pahoehoe Lava Flow Field on /o [#1328] The Prometheus lava flow on lo is a compound pahoehoe flow field. The morphologies of individual flow units and of the flow field as a whole are consistent with a total magma supply rate of -200-400 m3 s-1 feeding -30 local lava outbreaks at any one time with effusion rates of -10 m3 s-1 each.

KirchoffM. R. McKinnon W. B. Mountain Building on /o: Variable Volcanism and Thermal Stresses [#2030] We investigate the effect of eruption rate variation on the development of thermal stresses in Io' s crust, and their potential role in mountain building. Both a fixed and changing crustal thickness are considered.

Hargitai H. Kanitson D. Silicic Volcanism on Io? Evidence from Tohil Mons and Other Possible Volcanic Cones [#1544] We now see more evidence that Io's Tohil Mons' genesis, at least in part, is also due to viscous silicic volcanic activity. Moreover, from other smaller conical mountains, we postulate that silicic magmas are not unique on present lo.

Howell R. R. Mutual Event Observations of Hot Spots on Io [#2098] Mutual events provide the highest resolution observations oflo's volcanic hot spots obtainable from Earth and the first observations from the 2002/2003 series have been obtained. Improvements to the satellite ephemerides also make possible a better analysis of data from previous series.

Radebaugh J. Phillips C. McEwen A. S. Milazzo M. Keszthelyi L. P. Locations of Hotspots on Io from Galileo SSI Eclipse Images [#2087] We correlate Galileo SSI images of lo in eclipse by Jupiter with high resolution basemaps of Io in order to determine the locations of all hotspots with respect to surface features.

Smythe W. D. Soderblom L.A. Lopes R. M. C. /o's Thermal Regions and Non-S02 Spectral Features [#2024] An unidentified 3.15 micron absorption mapped on Io's surface appears to occur generally, but not exclusively, at lo's equator and associated with white material. It does not appear to have a direct correlation with plume activity.

Rathbun J. A. Johnson S. T. Spencer J. R. Loki, /o: An Update on Activity from Groundbased Data [#1375] Loki Patera is a 200 km diameter horseshoe-shaped low albedo feature on lo. Rathbun et al., using infrared data from various sources, determined that Loki erupted periodically, with a 540 day period. Recent groundbased data are no longer consistent with the periodic behavior.

Perry J. Radebaugh J. Lopes R. McEwen A. Keszthelyi L. Gish Bar Patera, /o: Geology and Volcanic Activity, 1996-2001 [#1720] Geology of Gish Bar Patera and volcanic activity as seen by Galileo SSI and NIMS, as well as groundbased observations discussed.

Schenk P.M. Wilson R. R. Tectonic and Regional Topography of/o: A New High [#2097] New topographic maps oflo have been derived using improved stereo mapping and photoclinometry. These include the topographic measurements of mountains and regional topography.

62 .34th LPSC Program Wilson R. R. Schenk P.M. Volcanic Topography of Io: The Final Chapter [#2069] New topographic maps of Io have been derived using improved stereo mapping and photoclinometry. These include the first topographic measurements of lava channels as well as new observations of shield volcanoes some of which are several kilometers high.

Schaefer L. Fegley B. Jr. Volcanic Origin of Alkali Halides on lo [#1804] We extend previous calculations of the equilibrium distribution of 0, S, Na, K, and Cl in volcanic gases to include Li, Rb, Cs, F, Br, and I. We show the gas composition at 1760 K and a range of pressures, simulating conditions at the Pele hot spot.

Fegley B. Jr. Schaefer L. Kargel J. S. Vapor Pressure, Vapor Composition and Fractional Vaporization of High Temperature Lavas on Io [#1686] We use a thermodynamic equilibrium model to calculate vapor pressure and vapor composition of high temperature lavas. We consider vaporization of erupted lavas without any fractional vaporization as well as continuous fractional vaporization.

Kargel J. S. Fegley B. Jr. Schaefer L. Ceramic Volcanism on Refractory Worlds: The Cases oflo and Chondrite CA!s [#1964] lo may have a refractory composition and "ceramic volcanism" whose nature is controlled partly by thermal evaporation of metals and oxides. Silicate evaporation and ceramic volcanism is also a possible explanation of meteoritic CAis.

34th LPSC Program ______63 Wednesday, March 19, 2003 10 AND BEYOND 8:30 a.m. Salon A

Chairs: P.M. Schenk R. M. C. Lopes

McKinnon W. B.* Desai S. Internal Structures of the Galilean Satellites: What Can We Really Tell? [#2104] Solar composition (in terms of the rock+ metal) structural models for the Galilean satellites can be constructed.

Keszthelyi L. * Jaeger W. L. McEwen A. S. Turtle E. P. Ia's Interior: A Synthesis View at the End of the Galileo Era [#1760] Galileo has collected its last data from Io. We present a model for the interior of lo that is consistent with the available observations.

Geissler P. E. * McEwen A. S. Phillips C. Keszthelyi L. Spencer J. Surface Changes on lo During the Galileo Mission [#1596] A careful survey of Galileo global monitoring images revealed more than 80 apparent surface changes that took place on Io during the five-year period of observation, ranging from giant plume deposits to subtle changes in the color or albedo of patera surfaces.

Rathbun J. A * Spencer J. R. Tamppari L. K. Martin T. Z. Barnard L. Travis L. D. Galileo PPR at lo: High Resolution Scans Taken in Conjunction with SSA and NIMS Data [#1385] The Galileo PhotopolarimeterRadiometer (PPR) is used at Io primarily two ways. First, two-dimensional images can be made by raster scans. Second, one-dimensional scans can be obtained when SSI or NIMS is the primary instument. PPR data taken simultaneaously with these instruments will be discussed.

Lopes R. * Kamp L. Smythe W. D. Carlson R. Radebaugh J. Gregg T. K. Paterae on lo: Volcanic Activity Observed by Galileo's NIMS and SSI [#1837] Paterae are the most ubiquitous volcanic construct on Io's surface. High resolution Galileo observations in infrared and visible wavelengths are used to study the thermal emission from Ionian paterae.

Davies A. G. * The Pulse of the Volcano: Discovery of Episodic Activity at Prometheus on lo [#1455] The 5-micron variability of Io volcanoes Prometheus and Amirani is determined from Galileo NIMS data. Prometheus is found to exhibit episodic activity. The eruption volume per cycle of activity and eruption mass fluxes have been calculated.

Veeder G. J. Matson D. L. * Johnson T.V. Davies A. G. Blaney D. L. Polar Heat Flow on lo [#1448] We use a 'Three Component' background model for Io to address unexpected night temperatures of90-95 Kat high latitudes. A 'Polar' active region results in an additional heat flow of -0.6 W m-2 which increases Io's total heat flow 2 from 2.5 to -3 W m- .

Williams D. A.* Turtle E. P. Keszthelyi L. P. Jaeger W. L. Radebaugh J. Milazzo M.P. McEwen A. S. Moore J. M. Schenk P.M. Lopes R. M. C. Greeley R. Mapping ofthe Culann-Tohil Region oflo [#1176] This presentation will discuss our latest results from geomorphologic mapping of Io using Galileo imaging data.

Bills B. G. * Aharonson O. Spatial and Temporal Patterns ofTidal Dissipation in Synchronous Satellites [#1465] Spatial patterns of tidal dissipation in synchronous satellites are quite insensitive to internal structure, contrary to widely held perceptions.

64 ______34th LPSC Program Bruesch L. S. * Asphaug E. Modeling Global Impact Effects on Middle-Sized Saturnian Satellites [#2010] Using a 3D smooth particle hydrodynamics code, we are modeling giant impact events and their global effects on the middle- sized Saturnian satellites. In particular, we are investigating whether such impacts could cause antipodal terrain disruption.

Schenk P. M. * Moore J. M. McKinnon W. B. Large Impact Features on Saturn's Middle-sized Icy Satellites: Global/mage Mosaics and Topography [#2094] New topographic maps of Saturn's middle-sized icy satellites derived from stereo imaging and 2D photoclinometry provide a sneak peak at the surprises in store when Cassini arrives at Saturn. We reexamine the morphology of large impact craters and describe their relaxation state.

Bottke W. F.* SternS. A. Levison H. F. An Exploration of Charon's Putative Eccentricity Around Pluto [#2113] We investigate whether Charon's putative eccentricity (between 0.003-0.008) could be a by-product of gravitational perturbations by Kuiper Belt object (KBO) flybys through the Pluto-Charon system and KBO impacts directly onto Pluto/Charon.

SternS. A.* Does the Pluto System Contain Additional Satellites? [#1106] The large solar-tidal stability radius of Pluto (-2 x 106 km; -90 arcsec from Pluto), the detections of KBO satellites, and the development of a Pluto-KB mission, serve to motivate satellite searches. I review the best constraints on satellites and describe a new search effort.

34th LPSC Program ______65 Wednesday, March 19, 2003 BABY, IT'S COLD (AND WINDY) OUTSIDE: AEOLIAN AND GLACIAL PROCESSES ON MARS 8:30 a.m. Salon B

Chairs: N. T. Bridges E. P. Turtle

Bridges N. T. * Greeley R. Eddlemon E. Laity J. E. Meyer C. Phoreman J. White B. R. Martian and Terrestrial Rock Abrasion from Wind Tunnel and Field Studies [#1766] Several important factors related to the rock abrasion processes on Earth and Mars are found: (1) Initial rock shape controls the rate of abrasion. (2) Irregular rocks abrade at greater rates than targets with smooth surfaces. (3) Rocks also abrade via slope retreat.

Bourke M. C. * Gone But Not Forgotten- The Aeolian Modification of Fluvial Surfaces on Mars: Preliminary Results from Central Australia [#1643] An analogue study in central Australia shows how patterns in aeolian dunes can be used to detect buried fluvial features.

Wilson S. A. * Zimbelman J. R. Williams S. H. Large Aeolian Ripples: Extrapolations from Earth to Mars [#1862] Large aeolian ripples on Earth are potential analogs to ripple-like features on Mars. Extrapolation of terrestrial ripple and dune profiles may provide quantitative parameters for determining a ripple or dune origin for ripple-like features on Mars.

Schorghofer N. * Aharonson O. Gerstell M. F. Slope-streak Formation and Dust Deposition Rates on Mars [#2012] Slope streaks, common in dust-covered low thermal inertia regions, are a dynamic geologic feature on Mars. We study the rate of their formation and fading based on overlap images.

Diniega S. * Richardson M. I. Ewald S. P. Toigo A. D. Byrne S. Martian Polar Wind Patterns Derived from Mapping of Seasonal Cap Dark Streaks [#2125] Frost streaks identified in images taken by MOC/MGS were used to develop a map of the martian south pole's southern spring circulation patterns. The same region and season was then examined with a mesoscale atmospheric circulation modeling program.

Pathare A. V. * Paige D. A. The Sublimation and Relaxation of Troughs and Scarps Within the Martian North Polar Layered Deposits [#2051] Although the morphological evolution of the NPLD is widely presumed to result from surface ablational processes, we show that viscous relaxation of subsurface water ice is more consistent with the slope and depth distributions of NPLD troughs and scarps.

Aharonson O. * Zuber M. T. Smith D. E. Neumann G. A. Depth and Distribution of C02 Snow on Mars [#1958] Our results demonstrate that MOLA measurements can be effectively corrected, averaged and fitted, to yield sensitive measurements of the changes in polar surface height as a function of both latitude and longitude over the Martian seasonal cycles.

Kargel J. S. * Wessels R. Molnia B. Environmental Conditions of Origin of Surface Morphologies of Martian Glacier-like Flows [#2092] Martian lineated valley fill and lobate debris aprons share many of characteristics, and some different ones, of terrestrial debris-covered glaciers. Features indicate surface or shallow subsurface melting in some cases, but mostly sublimation.

66 34th LPSC Program Marchant D. R. * Head 1. W. Cold-based Glaciers in the Western Dry Valleys of Antarctica: Terrestrial Landfonns and Martian Analogs [#1245] Cold-based glaciers in Antarctica Dry Valleys are characterized by landforms (drop moraines, sublimation tills, rock glaciers) that are often different than temperate or wet-based glaciers; these features are similar to deposits on Mars and may offer clues to their origin.

Head J. W. * Marchant D. R. Cold-based Mountain Glaciers on Mars: Western Arsia Mons Fan-shaped Deposits [#1247] A lobate deposit on Western Arsia Mons is analogous to cold-based glacier deposits in the Dry Valleys of Antarctica (ridged facies and drop moraines; knobby facies and sublimation tills; smooth facies and rock glaciers).

Shean D. E.* Head J. W. Pavonis Mons Fan-shaped Deposits -A Cold-based Glacial Model [#1153] The Pavonis Mons fan-shaped deposits display several unusual features including a ridged facies, smooth facies, knobby facies, flow features and radial ridges. Here we discuss these features and propose a cold-based glacial model for their formation.

Arfstrom J.D.* Protalus Ramparts and Transverse Ridge Moraines on Mars: Indicators of Swface Ice Depositional Processes Ridges resembling terrestrial protalus ramparts and transverse ridge moraines are associated with some gullies and alcoves on Mars. These ridges could be indicators of surface ice depositional processes related to seepage of water.

Turtle E. P. * Pathare A. V. Crown D. A. Hartmann W. K. Greenham J. C. Hartness N. Modeling the Fonnation of Lobate Debris Aprons on Mars by Creep of Ice-rich Pennafrost [#1891] We are performing finite-element analysis of viscous creep of ice/rock mixtures under present Martian conditions to reproduce the characteristics of debris aprons observed in MOC and MOLA data of the region east of the Hellas impact basin.

34th LPSC Program ______67 Wednesday, March 19, 2003 ASTEROIDS AND COMETS 8:30 a.m. Salon C

Chairs: E. Cloutis M. Kelley

Gaffey M. J. * Observational and Data Reduction Techniques to Optimize Mineralogical Characterizations of Asteroid Surface Materials [#1602] Mineralogy is the key to determining the compositional history of asteroids and the genetic relationships between asteroids and meteorites. This presentation discusses procedures for optimizing asteroid spectra for mineralogical interpretations.

Hardersen P. S. * Gaffey M. J. Abell P. A. Detailed Petrological Characterization of Asteroid 1459 Magnya [#1133] Detailed spectral analysis of 1459 Magnya reveals an asteroid that is not genetically related to 4 Vesta and likely represents a compositionally unique assemblage not yet represented in the terrestrial meteorite collection.

Holsapple K. A. * Could Fast Rotator Asteroids be Rubble Piles? [#1792] An analysis of the internal stresses and strength requirements for the small fast rotating asteroids is presented. The interpretation as monolithic rocks and shards is not warranted from the data.

Durda D. D. * Bottke W. F. Jr. Enke B. L. Asphaug E. Richardson D. C. Leinhardt z. M. The Formation ofAsteroid Satellites in Catastrophic Impacts: Results from Numerical Simulations [#1943] We model the formation of asteroid satellites in catastrophic collisions with a combination of SPH and N-body simulations. Catastrophic collisions create numerous fragments in orbit around the remaining target body or bound to one another.

Benoit P. H. * Hagedorn N. L. Kracher A. Sears D. W. G. White J. Grain Size and Density Separation on Asteroids: Comparison of Seismic Shaking and Fluidization [#1033] "Ponds", flat regions inside craters, inferred to be finer-grained than surroundings, were found on the asteroid Eros. Here we discuss two possible mechanisms for grain size and density separation, shaking and gas-flow induced fluidization.

Kracher A. * Sears D. W. G. Benoit P. H. Meier A. J. Eros Sulfur Deficiency: A Closer Look at Meteorite Comparisons [#1023] NEAR Shoemaker has found a surprisingly low sulfur abundance on Eros. Comparison with meteorites suggests that secondary depletion is more likely than primary deficiency. Laboratory simulation of asteroid surface processes may help explain the result.

Robinson M.S.* Thomas P. C. Veverka J. Missing Craters on Eros, Phobos, and the Moon- Crater Erasure in a Thick Regolith? [#1696] We investigate the possibility that the "missing" small crater population on Eros, Phobos, and the Moon is the result of preferential erasure in a loose regolith.

Izenberg N. R. * Murchie S. L. Bell J. F. III McFadden L.A. Wellnitz D. D. Clark B. E. Gaffey M. J. Eros Spectral Properties and Geologic Processes from Combined NEAR NIS and MSI Data Sets [#1870] We improve and extend the NEAR spectroscopic dataset for Eros and investigate global and localized spectral variation with respect to mineralogy, composition, and space weathering of Eros.

68 ______~34th LPSC Program Rivkin A. S. * Howell E. S. BusS. J. Hicks M. Reach W. T. Jarrett T. H. Binzel R. P. Spectroscopy and Photometry of the Earth Grazer 2002 NY40 [#1722] The asteroid 2002 NY 40 made a very close pass to the Earth in August 2002, when it was observed by observers all over the world in a variety of wavelengths. We present a full 0.3-4 micron spectrum, which shows a remarkable similarity to an LL6 spectrum, and discuss implications.

Abell P. A.* Fernandez Y. R. Pravec P. French L. M. Farnham T. L. Gaffey M. J. Hardersen P. S. Kusnirak P. Sarounova L. Sheppard S. S. Physical Characteristics ofAsteroid-Like Comet Nucleus C/2001 OG108 (LONEOS) [#1253] Physical characteristics of C/2001 OG 108 determined via near-IR reflectance spectroscopy indicates that this object has a spectrum similar P-type asteroids. This comet may represent the transition between highly active Halley Family comets and extinct comets.

Weissman P.R.* Lowry S.C. The Size Distribution of Jupiter-Family Cometary Nuclei [#2003] We have fit a power law to the size distribution of cometary nuclei, using data on 57 nuclei observed to date. The slope of the power law is -1.59 ± 0.03 which is shallower than most other small body populations in the solar system.

Lowry S.C.* Weissman P.R. Sykes M. V. Reach W. T. Observations of Periodic Comet 2P/Encke: Physical Properties of the Nucleus and First Visual-Wavelength Detection of Its Dust Trail [#2056] We have performed CCD observations of periodic comet Encke and estimated its size, shape, and rotation period. We have also accomplished the first visual-wavelength detection of the comet's associated dust trail.

Russell C. T. * Coradini A. DeSanctis M. C. Feldman W. C. Jaumann R. Konopliv A. S. McCord T. B. McFadden L. A. McSween H. Y. Mottola S. Neukum G. Pieters C. M. Prettyman T. H. Raymond C. A. Smith D. E. Sykes M. V. Williams B. G. Wise J. Zuber M. T. Dawn Mission: A Journey in Space and Time [#1473] The Dawn mission to be launched in May 2006 successively orbits Vesta and Ceres, in 2010 and 2014 respectively. The ion-propelled spacecraft carries an imager, mapping spectrometer, gamma ray/neutron spectrometer, laser altimeter and magnetometer.

34th LPSC Program ______69 Wednesday, March 19, 2003 MARTIAN METEORITES: WE COME IN PIECES 8:30 a.m. Marina Plaza Ballroom

Chairs: R. C. F. Lentz G. A. McKay

Head J. N. * The Relative Abundance of Recently-Launched Meteorites from the Moon and Mars [#1961] There are similar numbers of lunar and Martian meteorites on Earth. This is counter-intuitive given the size and proximity of the moon. Hydrocode simulations of meteorite launch events show that this is the expected result.

Minitti M. E.* Leshin L.A. Guan Y. Luo S. Ahrens T. J. The Effect of Impact Shock on Water and H Isotopes in Amphibole [#1524] An experimental and analytical study demonstrates that impact shock is capable of enriching the H isotopic composition of amphibole. These results are applied to H isotopic compositions measured in martian kaersutitic amphiboles.

Monkawa A.* Mikouchi T. Sekine T. Koizurni E. Miyamoto M. Shock Formation of Kaersutite in Martian Meteorites: An Experimental Study [#1534] We have performed shock experiments on analogous mixture of magmatic inclusions in Martian meteorites to explore the possibility that Martian Ti-rich kaersutite is a shock origin. We could successfully produce a kaersutite-like phase.

Mikouchi T. * McKay G. Shock Heating and Subsequent Cooling of Basaltic Shergottites: The Cases for QUE9420I and Dhofar 378 [#1920] Although QUE94201 and Dhofar 378 suffered similar degrees of severe shock, plagioclase recrystallized only in Dhofar 378. This is probably because Dhofar 378 cooled slowly enough to allow recrystallization while QUE94201 cooled too rapidly.

McKay G.* Le L. Koizumi E. Mikouchi T. Additional Constraints on the Crystallization of Basaltic Shergottite QUE94201 [#2109] We provide new constraints on the crystallization of QUE 94201 that support the idea that this sample represents a martian magma, and that it crystallized at an oxygen fugacity no lower than IW-1.

Koizumi E.* Mikouchi T. Monkawa A. Miyamoto M. Crystallization Experiments of Dar Al Gani Martian Meteorites: A Preliminary Report [#1567] We performed crystallization experiments of the bulk composition of DaGs, and found that the parent melt of DaGs is more Fe- and Al-rich than the bulk DaGs. The groundmass also appears to include some mafic cumulus component.

Imae N. * Ikeda Y. Kojima H. Igneous Petrogenesis ofYamato Nakhlites [#1520] We summarize analytical results of the Yamato nakhlites obtained by electron probe microanalyzer, and discuss the petrogenesis of nakhlites using the bulk chemical composition of magmatic inclusions in olivine phenocrysts and mesostasis.

Wadhwa M. * Crozaz G. Trace Element Geochemistry of New Nakhlites from the Antarctic and the Saharan Desert: Further Constraints on Nakhlite Petrogenesis on Mars [#2075] Ion microprobe measurements of REE and other selected trace and minor elements are reported in minerals of the new Antarctic (Y000593!749) and Saharan (NW A 998) nakhlites. Implications for their petrogenesis on Mars are discussed based on these geochemical data.

10 ______~34th LPSC Program Lentz R. C. F.* McSween H. Y. Jr. Crystal Size Distribution Analysis of New Nakhlites and Los Angeles: How Do They Compare with SNCs of Old? [#1914] Crystal size distribution analysis lends insight into crystallization histories. A new Los Angeles CSD shows a resemblance to a CSD of QUE 94201. Yamato nakhlite CSDs support the idea of a depth progression from Lafayette to Nakhla to Yamato.

Goodrich C. A. * Herd C. D. K. Taylor L. A. Spinels and Oxygen Fugacity in Olivine-Phyric and Lherzolitic Shergottites [#1426] Oxygen fugacities are determined from olivine-pyroxene-spinel assemblages in four olivine-phyric shergottites. Results, combined with previousjD2 determinations, suggest that shergottites may form two groups: a reduced, LREE-depleted group, and a more oxidized and emiched group.

Shih C.-Y. * Nyquist L. E. Wiesmann H. Barrat J. A. Age and Petrogenesis of Picritic Shergottite NWAJ068: Sm-Nd and Rb-Sr Isotopic Studies [#1439] The Sm-Nd isotopic data for Martian picritic shergottite NWA 1068 indicate a probable age of -185 Ma and an initial ENd of -7.0, resembling Shergotty, Zagami and Los Angeles. Its Rb-Sr isotopic system is severely altered.

Borg L. E.* Asmerom Y. Edmunson J. E. Uranium-Lead Isotopic Systematics of the Martian Meteorite Zagami [#1107] Uranium-lead isotopic analyses of the martian meteorite Zagami have been completed. The U-Pb isotopic systematics record both the time of formation of the Zagami source region ( 4550 ± 10 Ma) and the age at which it was disturbed (163 ± 4 Ma).

Dreibus G. * Jagoutz E. Chemical and Isotopic Constraints for the Martian Crust [#1350] The Rb-Sr systematics of the Martian crust was estimated from observed element correlations in the Martian meteorites and the measured K content of the Martian surface by spacecraft missions.

34th LPSC Program ______71 Wednesday, March 19, 2003 IDPs: FROM COMETS AND ASTEROIDS TO AEROGEL 1:30 p.m. Salon A

Chairs: A. J, Westphal M. Landgraf

Rietmeijer F. J. M. * Pfeffer M.A. Chizmadia L. Macy B. Fischer T. P Zolensky M. E. Warren J. L. Jenniskens P. Leonid Dust Spheres Captured During the 2002 Storm? [#1358] We present chemical analyses of small spheres collected in the lower stratoshere during a narrow window of opportunity at the time of the November 2002 Leonid Meteor Storm. We discuss extreme kinetic fractionation for the compositions of this deeply penetrated comet debris.

LandgrafM. * Krueger H. Altobelli N. Griin E. Transparency of the Inner Heliosphere to the Interstellar Dust Stream During Solar Maximum: Ulysses Measurements and Modelling [#1306] The Ulysses dust detector has detected an increased flux of interstellar dust grains since early 2000. This elevated flux is observed up to the most recent data end-2002. Only relatively small dust grains with high charge to mass ratios can explain the observations.

Floss C. * Stadermann F. J. Complementary Carbon, Nitrogen and Oxygen Isotopic Imaging of Interplanetary Dust Particles: Presolar Grains and an Indication of a Carbon Isotopic Anomaly [#1238] We report NanoSIMS measurements of C, Nand O isotopes in two unusual IDPs. Both have bulk enrichments of 15N, as well as 15N hotspots. One of these hotspots is, furthermore, depleted in 13C. Each IDP also contains a 170-rich presolar grain.

Dai Z. R. * Bradley J.P. Brownlee D. E. Joswiak D. J. The Petrography of Meteoritic Nano-Diamonds [#1121] The carrier of nano-diamonds in thin-sections of meteorites and interplanetary dust particles (IDPs) is a disordered (amorphous) carbonaceous material, suggesting that nano-diamonds are associated with an (amorphous) organic carrier rather than a (graphitic) inorganic carrier.

Stephan T. * Leitner J. Floss C. Stadermann F. J. TOF-SIMS Analysis of Isotopically Anomalous Phases in Interplanetary Dust and Renazzo [#1343] We used TOF-SIMS to identify carriers ofD and 15N in one IDP and in Renazzo matrix. Organic material closely connected to Mg-rich, Fe-poor anhydrous minerals seems to be the most plausible carrier of isotopically anomalous matter in these samples.

Mukhopadhyay S. * Nittler L. R. D-rich Water in Interplanetary Dust Particles [#1941] We have investigated the carrier phase(s) ofD excesses in IDPs and report the first positive identification of aD-rich hotspot that is not associated with organic matter.

Alt!on J. * Arpigny C. Robert F. Jehin E. Manfroid J. Hutsemekers D. Zucconi J.-M. Schulz R. Stiiwe J. A. Sangely L. Chaussidon M. Marty B. Engrand C. Cometary Organic Macromolecules in Interplanetary Dust Particles? [#1308] Based on the determination of N concentrations in D-rich molecules in IDPs and new 14N/15N ratios in comets, it is proposed here that organic chemistry of IDPs may provide a direct link with comets.

72 ______.34th LPSC Program Flynn G. J. * Keller L. P. Wirick S. Jacobsen C. A Preliminary Assessment of the Organic Content of Interplanetary Dust Particles [#1652] We compared the strength of the C = 0 absorption in IDPs with that in Murchison residue and the aliphatic C-H2 absorption to that in a 1% paraffin and 99% clay mixture. On average, anhydrous and hydrated IDPs have percent-level aliphatic and carbonyl.

Westphal A. J. * Snead C. Dominguez G. Bradley J.P. Zolensky M. E. Flynn G. Brownlee D. An Extraction and Curation Technique for Particles Captured in Aerogel Collectors [#1826] We present a technique for curation of particles captured in aerogel which will preserve the entire particle track, and will allow for elemental analysis the terminal particle residue and any particle residues located along the track.

Engrand C.* Gounelle M. Zolensky M. E. Duprat J. About Tag ish Lake as a Potential Parent Body for Polar Micrometeorites; Clues from Their Hydrogen Isotopic Compositions [#1688] It was suggested that Tagish Lake could represent the parent body of Antarctic micrometeorites (AMMs). We measured their hydrogen isotopic compositions and our results suggest that this meteorite and the AMMs could not derive from the same parent body.

Toppani A. Marty B.* Zimmermann L. Libourel G. Simulation of Nitrogen and Noble Gases Release During Atmospheric Entry of Micrometeorites [#2028] In order to evaluate the delivery of extraterrestrial volatiles to the Earth atmosphere by micrometeorites, noble gases and nitrogen were analysed in a set of flash-heated Orgueil material.

GengeM. J. * Primary Variations in Micrometeorites with Entry Velocity [#1151] Certain petrological features of micrometeorites can be used to correlate entry heating effects between different particle types allowing their distribution with entry velocity to be analysed.

Keller L. P. * Flynn G. J. Far-IR Spectroscopy of Interplanetary Dust, Circumstellar Silicate Analogs, and Aerogel: A Prelude to Stardust Samples [#1903] Far-IR spectra of IDPs show absorption features from crystalline silicates similar to those observed in spectra of comets and young stars by the Infrared Space Observatory. We also demonstrate the application offar-IR spectroscopy to the non- destructive, in situ, analysis of particles in aerogel.

34th LPSC Program ______73 Wednesday, March 19, 2003 MARS GEOMORPHOLOGY AND IMPACTS 1:30 p.m. Salon B

Chairs: J. B. Plescia H. E. Newsom

Beyer R. A.* McEwen A. S. Measurements ofthe Strike and Dip of Layers in Coprates Chasma, Valles Marineris, Mars [#2130] We have used MOC, MOLA, and THEMIS data to make measurements of the strike and dip of layers in the Coprates Chasma region of Mars.

Harrison K. H. * Grimm R. E. Rheological Constraints on Martian Landslides [#1859] We constrain the rheological properties of martian landslide material from dynamical numerical models, compare the results to terrestrial and lunar examples, and draw conclusions regarding pore fluid pressure requirements.

Plescia J. B. * Amphitrites-Peneus Paterae/Malea Planum Geology [#1478] Amphitrites-Peneus Paterae lie on the southern rim of Hellas. The calderas are each -125 km across. The surface is heavily mantled obscuring the underlying morphology. The mantle has a scallop morphology associated with removal of ground ice.

Ghail R. C. * Hutchison J. E. An Alluvial Fan at Apollinaris Patera, Mars [#1775] The large fan-like deposit at Apollinaris Patera, Mars, is demonstrated from Mola, Themis and Moe data to have an alluvial origin, indicating that active volcanism and a caldera lake coexisted for an extended period of time.

Tanaka K. L. * Skinner J. A. Jr. Volatile-Driven, Deformational and Resurfacing Origin for the Vastitas Borealis Formation on Mars [#1924] We propose that the enigmatic features associated with the Vastitas Borealis Formation on Mars collectively point to an origin involving deformation and resurfacing involving near-surface ground volatiles. New MGS and THEMIS data are providing a fresh look.

Ghatan G. J. * Head J. W. South Circumpolar lee Sheet on Mars: Regional Drainage of Meltwater Beneath the Hesperian-aged Dorsa Argentea Formation [#1129] Detailed mapping of the Cavi Sisyphi area in the south polar region of Mars reveals evidence for basal meltwater drainage. Sinuous, esker-like ridges along the Sisyphi basin floors, suggest meltwater likely drained beneath the basins.

Kreslavsky M.A.* Head J. W. Stratigraphy of Young Deposits in the Northern Circumpolar Region, Mars [#1476] We used high-resolution MOC images to found stratigraphic relationships between geologically young units surrounding the northern polar cap: ice-rich high-latitude layer, dark and bright dunes, icy layered deposits (polar cap outliers).

Werner S.C. * Neukum G. The End of the Heavy Bombardment as Reflected in the Ages of Martian Impact Basins [#1986] The ages of Martian basins are discussed in comparison to the lunar situation.

74 ______.34th LPSC Program Hiesinger H.* Head J. W. III Geology of the /sidis Basin, Mars [#1261] We investigate the lsidis basin based on topographic and imaging data from Mars Global Surveyor and Mars Odyssey. This study complements our recently completed analyses on Syrtis Major to the west and the transition between Syrtis Major and Isidis.

Newsom H. E.* Barber C. A. Scheible R. T. Hare T. M. Feldman W. C. Sutherland V. Gordon H. Thorsos I. E. Livingston A. Lewis K. Evidence for an 800 km Diameter Impact Structure in Meridiani Planum and Associated Channels and Basins: A Connection with the Origin of the Hematite Deposits? [#1414] The discovery of an 800 km diameter multi-ringed basin and evidence for fluvial and lacustrine environments in Meridiani suggests a connection with the origin of the hematite deposits and is consistent with the hematite occurrence in the Aram basin.

Hartmann W. K. * Popova O. Nemtchinov I. SNC' s That Didn't Make It: Analysis of Impact Crater Clusters on Mars [#1815] New work is reported on clusters of craters found on Mars. We confirm small clusters (10-m scale craters) predicted in our earlier work and suggest that large clusters (50-m scale craters) result from fragments of objects launched from Mars almost at escape velocity.

Herrick R. R. * Hessen K. The Impact Angles of Different Crater Forms on Mars [#2122] We have surveyed Martian impact craters over a large size range to empirically determine the angles for which various phenomena occur.

McEwen A.* Turtle E. Burr D. Milazzo M. Lanagan P. Christensen P. Boyce J. THEMIS Science Team Discovery of a Large Rayed Crater on Mars: Implications for Recent Volcanic and Fluvial Activity and the Origin of Martian Meteorites [#2040] THEMIS IR images reveal a very recent 10-km crater on Mars with 800-km rays consisting of about a million secondary craters, a result consistent with the existence and discovery of Martian meteorites.

34th LPSC Program ______75 Wednesday, March 19, 2003 EVOLUTION OF THE MARTIAN INTERIOR 1:30 p.m. Salon C

Chairs: C. B. Agee D. S. Musselwhite

Zhang Y. * Volatiles on Mars [#1336] The abundance of volatiles on Mars is much less than that on Earth. Is the depletion a primary feature or a secondary feature? In this contribution, I outline a model for volatile budgets of Mars, and implications for water on Mars.

Marti K. * Mathew K. J. Marty B. Martian Xenology: Indigenous, Radiogenic and Fission Components [#1816] We identify Martian interior, radiogenic and fission components in recently recovered shergottites, which further constrain the differentiation and evolution of the mantle.

Goreva J. S. * Leshin L.A. Guan Y. Ion Microprobe Measurements of Carbon Isotopes in Martian Phosphates: Insights into the Martian Mantle [#1987] In situ measurements of C in the phosphates from meteorites Los Angeles, Zag ami, QUE9420 1 and ALH8400 1 predict isotopically light martian magmatic C, heavier than previous estimates yet significantly lighter than the terrestrial value.

Herd C. D. K. * Treiman A. H. McKay G. A. Shearer C. K. Light Lithophile Elements in Natural and Experimental Phases in Martian Basalts: Implications for the Degassing of Water from Martian Magmas [#1635] We tested prior claims of magmatic water in martian basalts by obtaining LLE analyses of Shergotty and Zagami pyroxene, analyses of Pasamonte pyroxene, and silicate and phosphate partition coefficients for Li and B appropriate to martian basalts.

Ghosh A.* Nimmo F. McSween H. Y. Jr. The Effect of Early Accretion and Redistribution of26AI on the Thermal Evolution of Mars [#2011] Recent data from accretion models and Hf-W ages show that Mars accreted in <10 Myrs. We explore the effect of early accretion and partitioning of 26 AI, to the mantle during core formation, on the thermal evolution of Mars.

Foley C. N. * Wadhwa M. Janney P. E. Tungsten Isotopic Composition of the SNC Meteorite Los Angeles: Further Implications for Early Differentiation History of Mars [#2117] The tungsten composition has been measured in a number of terrestrial geostandards, Allende, and the SNC Los Angeles. Implications are discussed for the differentiation history of Mars.

Fei Y. * Bertka C. M. Experimental Constraints on the Thermal Structure of the Martian Interior and Martian Magmatism [#1829] We present experimental data on melting relations in a model Martian core composition in the system Fe-Ni-S and melting curve of the Martian mantle up to 25 GPa. Our experimental study provides essential data to estimate the core temperatures and constraints on thermal history models.

Agee C. B. * Draper D. S. Melting of Model Martian Mantle at High-Pressure: Implications for the Composition of the Martian Basalt Source Region [#1408] High pressure melting experiments on Homestead ordinary chondrite constrain early Martian mantle processes.

76 ______.34ffiLPSCProgram Elkins-Tanton L. T. * Parmentier E. M. Hess P. C. A Model for Martian Magma Ocean Crystallization and Overturn [#1479] We create a simple model for Martian magma ocean crystallization and assess the outcome of overturn due to density instability. This model may explain aspects of the Martian magnetic field and may reproduce the compositions of Martian meteorite source regions.

McLennan S. M. * Evidence for a Distinctive Rare Earth Element-enriched Mantle Reservoir on Mars [#1710] La/Th ratios of shergottites are subchondritic and decrease with increasing La, consistent with mixing between depleted mantle and enriched crust. A distinctive high La/Th mantle reservoir is needed to balance low La/Th ratios of shergottites.

Treiman A. H. * Mantle Metasomatism in Mars: Evidence from Bulk Chemical Compositions of Martian Basalts [#1413] **(two stars)- A whodunit. Colombo-like detective seeks cause of chemical enrichments in martian basalts. The real crime is the script.

Musselwhite D. S. * Jones J. H. Oxygen Fugacity of the Martian Mantle From Pyroxene/Melt Partitioning ofREE [#2032] This study is part of an ongoing effort. to calibrate the pyroxene/melt REE oxybarometer for conditions relevant to martian meteorite.

McCanta M. C.* Rutherford M. J. Dyar M.D. Delaney J. S. Fl+!.EF'e Ratios in Pigeonite as a Function off02: A Preliminary Investigation [#1361] 3 2 We present an experimental investigation into the partitioning of Fe +/Fe + between pigeonite and a basaltic shergottite melt as a function ofj02. Once calibrated, this could serve as a potential oxybarometer for the martian meteorites.

34th LPSC Program ______77 Wednesday, March 19, 2003 ACHONDRITES TO ZCHONDRITES 1:30 p.m. Marina Plaza Ballroom

Chairs: R. H. Jones B.A. Cohen

Cohen B. A.* Goodrich C. A. Feldspathic Clasts in Polymict Ureilites [#1518] A comprehensive survey offeldspathic clasts in polymict ureilites DaG 164/165, DaG 319/665, and EET83309 reveals an igneous trend representing partial melting on the ureilite parent body. Other feldspathic clasts may not be related to this trend.

Kita N. T. * Ikeda Y. Shimoda H. Morishita Y. Togashi S. Timing of Basaltic Volcanism in Ureilite Parent Body Inferred from the 26Al Ages of Plagioclase-bearing Clasts in DaG-319 Polymict Ureilite [#1557] 26 The initial AlPAl ratios of 4 X w-? (-5 M.y. after CAis) were obtained from plagioclase-bearing clasts in DaG-319 polymict ureilite, indicating a short time period of less than a million years for the differentiation of the parent body.

Lee D-C. * Halliday A. N. Singletary S. J. Grove T. L. 182Hf_I 82 W Chronometry for an Early Differentiation in the Parent Body of Ureilites [#1179] A suite ofureilites have been studied with Hf-W isotope system and all show sub-chondritic W isotope and Hf/W ratios, suggesting that ureilite parent body differentiated early.

Singletary S. J. * Grove T. L. Experimental Investigations of Ureilite Petrogenesis: Relationships Between mg# and Smelting Extent [#1192] We present new experimental results that indicate low mg# ureilites that contain pigeonite as the sole pyroxene have undergone greater extents of partial melting.

Nehru C. E. * Weisberg M. K. Boesenberg J. S. Kilgore M. Tafassasset: A Metal-rich Primitive Achondrite with Affinities to Brachinites [#1370] Tafassaset is a new brachinite-like meteorite. Its texture and mineralogy are similar to Brachina but it has a high metal abundance. Its oxygen isotopes differ from Brachina and the main group bachinites and plot near the LEW 88763 brachinite.

Liu Y. * Nyquist L. Wiesmann H. Shih C. Schwandt C. Takeda H. Internal Rb-Sr Age and lnitial 87Sri 6Sr of a Silicate Inclusion from the Campo Del Cielo Iron Meteorite [#1983] 87 Internal Rb-Sr age of 4.54 ± 0.08 Ga with initial Sr/86Sr of 0.69926 ± 0.00027 was determined for a silicate inclusion in Campo del Cielo lAB iron. This result is consistent with the ages ofRb-Sr, Sm-Nd and Ar-Ar obtained from the plagioclase- diopside-rich materials in Caddo lAB iron.

Maruoka T. * Kurat G. Zinner E. Varela M. E. Ametrano S. J. Carbon Isotopic Heterogeneity of Graphite in the San Juan Mass of the Campo Del Cielo JAB Iron Meteorite [#1663] We have measured the carbon isotopic composition of graphite in the San Juan mass of Campo del Cielo (lAB) to constrain the origin of lAB iron meteorites.

Becker H.* Walker R. J. Molybdenum Isotopic Composition of Iron Meteorites, Chondrites and Refractory Inclusions [#1170] New Mo isotopic data for iron meteorites, chondrites and refractory inclusions show no conclusive evidence for large-scale and systematic Mo isotopic heterogeneities in the inner solar system at the 1-3 E level.

78 ~34thLPSCProgram Humayun M. * Campbell A. J. Microanalysis of Niobium in Iron Meteorites [#1480] LA-ICP-MS analysis of individual phases in iron meteorites indicates that Nb is ~resent in troilite, but absent from metal, phosphide and carbide. This has implications for Nb in the Earth's core, and for 2Nb-92Zr chronometry of troilite.

Chabot N. L. * Jones J. H. The Parameterization of Solid Metal-Liquid Metal Partitioning of Siderophile Elements [#1004] The composition of a metallic liquid can significantly affect partitioning behavior. We present a parameterization method for expressing the partitioning behavior of siderophile, metal-loving, elements as a function of the metallic composition.

Petaev M. I. * Jacobsen S. B. Differentiation of Metal-rich Meteoritic Parent Bodies [#1747] We describe our FeNiSP code for modeling crystallization ofFe-Ni-S-P melts and use it to interpret trace element patterns of iron meteorites and metal of the Divnoe primitive achondrite.

Yang J. * Goldstein J. I. An Improved Model to Determine the Cooling Rates of Mesosiderites and Iron Meteorites [#1156] An improved model using latest phase diagram and interdiffusion coefficients to determine the cooling rates of meteorites showed that this model can match the experimental data better than previous models for both mesosiderites and iron meteorites.

Jones R. H.* Wasson J. T. Larson T. Sharp Z. D. Milton: A New, Unique Pallasite [#1683] The Milton pallasite was found in Missouri in 2000. The chemistry of the olivine and metal phases, plus the oxygen isotope ratios of the olivines, differ significantly from other pallasites, making Milton unique.

34th LPSC Program ______79 Wednesday, March 19, 2003 NASA HEADQUARTERS BRIEFING 5:00 p.m. Salon B

Chair: D. J. Lindstrom

80 ______34th LPSC Program Thursday, March 20, 2003 MISSIONS AND INSTRUMENTS 8:30 a.m. Salon A

Chairs: A. F. Chicarro T. Hoogenboom

Chicarro A. F. * Europe Goes to Mars and Venus- The Mars and Venus Express Missions [#1145] The European Space Agency has undertaken an ambitious planetary exploration programme aiming at Mars, the Moon, Mercury, Titan and comet Wirtanen. Now, a new mission to Venus has been added that would reuse both the Mars Express bus and many of its instruments, hence its name of Venus Express.

Whitby J. A. * Rohner U. Benz W. Wurz P. A Laser-Ablation Mass Spectrometer for the Surface of Mercury [#1624] A snapshot of the development of an instrument capable of making in situ elemental and isotopic measurements on the surface of a rocky planet or planetesimal. Designed with the BepiColombo mission to Mercury in mind.

Barraclough B. L. * Wiens R. C. Steinberg J. T. Dors E. E. Neugebauer M. Burnett D. S. Gosling J. T. Bremmer R. R. The Genesis Solar Wind Collection Mission: Current Status [#1232] A brief review of the NASA Genesis mission is presented and the three types of solar wind samples that are being collected for return to Earth are discussed. The current status of the mission is given and the sample collection history through the end of 2002 is summarized.

Jurewicz A. J. G. Jones S.M. * Tsapin A. Mih D. T. Connolly H. C. Jr. Graham G. A. Locating Stardust-like Particles in Aerogel Using X-Ray Techniques [#1228] To allow individual Pis to locate and extract particles in their own laboratories, we are exploring the application of standard X-ray equipment and commercial techniques for precisely locating specific particles in aerogel.

34th LPSC Program ______81 Thursday, March 20,2003 VENUS 9:30 a.m. Salon A

Chairs: A. F. Chicarro T. Hoogenboom

Hansen V. L. * In Situ Partial Melt on Venus: Evidence for Ancient Water? [#1152] Shield terrain comprises countless tiny lava flows that coalesced to form an ultra-thin discontinuous regionally extensive mechanically strong layer; lava represents point-source crustal partial melt and may provide evidence for ancient Venus water.

McGill G. E. * Kinematics of a Linear Deformation Belt; the Evolution of Pandrosos Dorsa, Venus [#1012] The directional vs. non-directional models for venusian stratigraphy may be evaluated by means of detailed analyses of selected regions or features, such as deformation belts. Almost all structures in Pandrosos Dorsa are older than adjacent regional plains.

Ivanov M. A * Head J. W. Evolution of Three Largest Coronae on Venus, Heng-0, Quetzalpetlatl, and Artemis: Preliminary Results [#1188] Stratigraphic analyses show that very large coronae initiated structural deformation before regional plains emplacement and differed significantly in amounts of volcanism.

Smrekar S. E. * Moreels P. Franklin B. J. Global Characterization of Polygonally Fractured Terrain on Venus and Implications fora Climate Change Origin [#1738] We examine the size, morphology, stratigraphy, and geologic setting of 204 polygon terrains found using an automated watershed method. Stresses resulting from climate charge-induced temperature variations predict the observed characteristics.

Hoogenboom T. * Smrekar S. E. Anderson F. S. Houseman G. Admittance Survey ofType 1 Coronae on Venus: Implications for Elastic Thickness [#1372] We survey the admittance signature of 105 Type 1 coronae on Venus to determine the controlling parameters which govern Type 1 coronae formation.

Carter L. M. * Campbell D. B. Campbell B. A Margot J. L. Searching for Surficial Deposits on Venus Using Multi-Polarization Radar [#1809] Arecibo radar observations were used to search for surficial deposits on Venus. Dual-polarization measurements allowed mapping of the fraction of linear polarization in the echo. The maps show surface layers associated with several craters, as well as from areas of wind streaks and dome fields.

Bondarenko N. V. * Dark Crater-related Deposits on Venus in Radar Cross-Section- Emissivity Domain [#1290] Diffuse features (parabolas and halos) associated with impact craters on Venus are considered as deposits ofloose material. A model of electromagnetic wave reflection by such features is applied to the observed emissivity and radar cross-section.

Basilevsky AT.* Head J. W. Setyaeva I. V. Impact Craters of Venus with D>5 km Classified Based on Degree of Preservation of the Associated Radar- Dark Deposits [#1222] Venusian craters >5 km in diameter are classified based on presence and type of the associated radar dark deposits which are used to roughly estimate the crater age. These estimates are dependent on crater size. Potential latitude effect was not found.

82 ______----'34th LPSC Program Thursday, March 20, 2003 MARS WET AND WILD: VALLEY NETWORKS, OUTFLOW CHANNELS, AND BASIN FLOODING 8:30 a.m. Salon B

Chairs: R. A. Craddock J. M. Boyce

Rice J. W. Jr. * Christensen P. R. RuffS. W. Harris J. C. Martian Fluvial Landforms: A THEMIS Perspective After One Year at Mars [#2091] Martian fluvial landforms (outflow and valley networks) have been imaged with THEMIS and are revealing new morphologies and histories.

Hanna J. C.* Phillips R. J. A New Model of the Hydrologic Properties of the Martian Crust and Implications for the Formation of Valley Networks and Outflow Channels [#2027] Results will be discussed from a new hydrologic model for the Martian crust, which allows for a detailed representation of the porosity, hydraulic conductivity, and compressibility of the crust as functions of depth and pore pressure.

Craddock R. A.* Irwin R. P. III Howard A. D. Characteristics ofMartian Valley Networks and the Implications for Past Climates [#1888] New data suggest that martian valley networks are much more complicated, integrated systems than have been previously reported. Drainage densities are comparable to terrestrial systems and agree well with slope, suggesting that the early climate supported precipitation and surface runoff.

Stepinski T. F. O'Hara W. J. IV * Vertical Analysis of Martian Drainage Basins [#1659] Longitudinal profiles and the slope-area relation in drainage basins are calculated for 20 martian and 19 terrestrial basins. Martian basins have linear profiles and smaller values of concavity exponent, except for basins on the slopes of volcanoes.

Hynek B. M. * Phillips R. J. New Data Reveal Mature, Integrated Drainage Systems on Mars Indicative of Past Precipitation [#1842] We analyzed recent data with new techniques and found far more valley networks and integrated drainage systems on Mars than previously observed. Early precipitation and surface runoff may be necessary to explain the mature drainage basins.

Coleman N. M. Dinwiddie C. L. * Groundwater Recharge in an Epoch of Climax Lakes in the Valles Marineris, Mars [#1399] Episodic volcanism in areas west and south of Valles Marineris could have produced meltwater equivalent to many volumes of the Valles Marineris canyons during Hesperian time. Very small recharge rates would have sufficed.

Fairen A. G. Dohm J. M. * Baker V. R. de Pablo M.A. Ruiz J. Ferris J. C. Anderson R. C. Tharsis-triggered Flood Inundations ofthe Lowlands of Mars [#1093] Three main stages for water evolution are recorded on Mars: a Noachian /Early Hesperian ocean, portrayed by an almost equipotential line we name Contact 0; a Late Hesperian sea (Contact 2); and minor lakes representing Late Hesperian ponded waters.

Wilson L. * Head J. W. Oceans in the Northern Lowlands of Mars? Assessment of Dike Emplacement as a Mechanism for Rapid Release ofa Confined Subcryosphere Aquifer [#1186] We show that cracking of the cryosphere by dike injection and subsequent release of water from a confined aquifer ·can take place fast enough to form an ocean in the northern lowlands of Mars.

34th LPSC Program ______83 Grimm R. E. * Harrison K. H. A Parochial View of Groundwater Flow on Mars [#2053] The global flow of groundwater on Mars is modeled numerically under a range of conditions prevailing at different stages in Mars' history. Special attention is given to the global connectivity of the flow.

Clarke J. * Stoker C. Mound Spring Complexes in Central Australia: An Analog for Martian Groundwater Fed Outflow Channels? [#1504] The Dalhousie Springs complex in central Australia is a possible analog for Martian outflow channels composed of spring mounds, playa lakes, a large outflow channel dispersing into a dune field, surrounded by groundwater eroded mesas.

De Han R. A.* Washington P. A. Thibodeaux C. J. Excavation Time for the Vedra and Maumee Channels (Mars) by Application of Equilibrium Sediment Transport Theory [#1178] Improved measurements of channel gradients and configurations provided by MOLA allow estimates of sediment load and calculation of probable excavation times for martian outflows. Excavation of Maumee and Vedra Valles required more than a martian year.

Webb V. E. * McGill G. E. Assessing the Geomorphic Development of Putative Shorelines Contiguous to Northern Arabia Terra, Mars [#1132] Using GIS software we have conducted detailed evaluations of proposed shorelines within a relatively small area along the dichotomy boundary. Results suggest that two of the three putative shorelines may represent zones of significant coastal erosion.

Boyce J. M. * Mouginis-Mark P. J. Garvin J. B. Garbeil H. Evidence for a Thick Mantle of Volatile-rich Materials in the Utopia Basin, Mars, Based on Crater Depth/Diameter Measurements [#1967] This is a study of the depth/diameter relationship of 1,430 impact craters in Utopia Planitia, Mars. Two different trends are identified, which we propose are due to a thick volatile-rich mantle inN. central region, caused by flooding of the basin.

84 ~34ffiLPSCProgram Thursday, March 20, 2003 ORIGINS OF PLANETARY SYSTEMS 8:30 a.m. Salon C

Chairs: F. M. Richter A. P. Boss

Boss A. P. * Gas Giant Protoplanet Formation: Disk Instability Models with Detailed Thermodynamics and Varied Artificial Viscosity [#1075] We show that when artificial viscosity is included in 3D disk instability models with radiative and convective cooling, the tendency to form clumps is reduced somewhat, but not eliminated, unless the artificial viscosity is increased by a factor of ten over the nominal value.

Weidenschilling S. J. * . Planetesimal Formation in Two Dimensions: Putting an Edge on the Solar System [#1707] Radial migration of solid bodies due to gas drag during coagulation tends to produce a sharp outer edge to the planetesimal swarm, consistent with the observed cut-off of Kuiper Belt objects.

HahnJ. M. * The Secular Evolution of the Primordial Kuiper Belt [#2121] A model of the secular evolution of the primordial Kuiper Belt is described. It is shown that a Kuiper Belt having but a modest amount of mass is very susceptible to the propagation of spiral waves.

Estrada P.R.* Mosqueira I. Gap-Opening, Disk Clearing, and the Survival of the Regular Satellites of Jupiter and Saturn [#1820] In this study we investigate the possibility that disk-satellite interactions account for both the survival of satellites and the clearing of the gas disk.

Marov M. Ya. * Ipatov S. I. Volatiles Inventory to the Inner Planets Due to Small Bodies Migration [#1099] The amount of ice delivered to the Earth by planetesimals during formation of the giant planets is of the order of the mass of water in the Earth oceans. Mars acquired more water per unit mass of a planet than Earth.

Cameron A. G. W. * The Supernova Trigger and Meteoritic Components [#1083] The supernova trigger is the source of the short-lived extinct radioactivities injected into the solar nebula together with, as condensation products in the expanding supernova envelope, CAis, AOAs, FUN CAis, and some presolar grains.

Alexander C. M. O'D. * Making CAis and Chondrules from CI Dust in a Canonical Nebula [#1391] Kinetic modeling shows that when gas-melt exchange is taken into account, chondrule and CAl elemental and isotopic compositions can be explained by formation from CI dust compositions under canonical nebula conditions at 2-3 AU.

Clarke T. L. * Terrestrial Planets are Rare [#1886] Early heating by 26 Al decay is found to be a condition for the formation of terrestrial planets implying that terrestrial planets are rare.

Shukolyukov A. * Lugmair G. W. Bogdanovski O. Manganese-Chromium Isotope Systematics of Ivuna, Kainsaz and Other Carbonaceous Chondrites [#1279] We present our new results on the Mn-Cr isotope systematics in carbonaceous chondrites, which may be helpful for understanding some processes that occurred in the early solar system.

34th LPSC Program ______85 Chen J. H.* Papanastassiou D. A Wasserburg G. J. Endemic Ru Isotopic Anomalies in Iron Meteorites and in Allende [#1789] We have identified endemic Ru isotope anomalies (s-process only Ru-100 deficits) in iron meteorites and in the Allende whole rock.

Yin Q. Z. * Jacobsen S. B. The Initial 182W/83W and 182Hf/80Hf of the Solar System and a Consistent Chronology with Pb-Pb Ages [#1857] The issue of what is true solar initial 182W/183W ratio is examined. We find a consistent result in iron meteorites with that of chondrite metals. Hf-W model ages are consistent with phosphate Pb-Pb ages for chondrites.

Richter F. M. * Time Scales for Elemental and Isotopic Fractionation by Evaporation and Condensation [#1231] The manner in which elemental and isotopic fractionations depend on the relative size of the time scales for evaporation, condensation, diffusion, and temperature change are explored.

Fedkin A V. * Grossman L. Magnesium and Silicon Isotopic Compositions Recorded During Simultaneous Crystallization and Evaporation of CMAS Droplets into Ambient Solar Gas [#1803] The composition change of an evaporating droplet is strongly influenced by its fractional surface area of crystals. For crystallization during evaporation, the bulk isotopic composition of an element yields an underestimate of its fraction lost.

86 .34th LPSC Program Thursday, March 20, 2003 BASALTIC ACHONDRITES: GO WITH THE FLOW 8:30 a.m. Marina Plaza Ballroom

Chairs: H. Haack L. E. Nyquist

Irving A J. * Kuehner S. M. Rumble D. III Hupe A C. Hupe G. M. Olivine Diogenite NWA 1459: Plumbing the Depths of4 Vesta [#1502] NW A 1459 is a new ultramafic achondrite from Morocco that represents the fourth known olivine diogenite, and may be either a cumulate or a sample of the shallow Vestan mantle.

Haack H.* Bizzarro M. Baker J. A Rosing M. Early Thermal Evolution and Sizes of the HED and Mesosiderite Parent Bodies: New Constraints from Lu-HfChronology [#1317] New Lu-Hf chronological data underlines the close similarity between the HED and mesosiderite parent bodies. Both parent bodies had diameters of several hundred kilometers and their igneous evolution continued for about 150 My. The HED parent body is apparently Vesta- but where is the MPB?

Yamaguchi A* Setoyanagi T. Ebihara M. An Anomalous Eucrite, Dhofar 007, and a Possible Genetic Relationship with Mesosiderites [#1377] We performed a petrologic and geochemical study of an anomalous eucrite, Dhofar 007. The thermal history and high abundance of siderophile elements of Dhofar 007 indicate a genetic relationship with mafic clasts in mesosiderites.

Bogard D. D. * Garrison D. H. 39Ar- 40Ar AJes of Eucrites and the Thermal History ofAsteroid 4-Vesta [#1068] New 39 Ar- Ar ages of several cumulate and unbrecciated eucrites cluster at -4.48 Gyr, unlike some previously reported Pb-Pb and Sm-Nd ages. This time may date a very large cratering event on Vesta, which interrupted internal metamorphism.

Wadhwa M. * Foley C. N. Janney P. Beecher N. A Magnesium Isotopic Composition of the Juvinas Eucrite: Implications for Concordance of the Al-Mg and Mn-Cr Chronometers and Timing of Basaltic Volcanism on Asteroids [#2055] New high precision Mg isotopic data are presented for mineral separates from the noncumulate eucrite Juvinas. Based upon these results, implications are discussed for the crystallization age of Juvinas.

Buchanan P. C.* Zolensky M. E. Carbonaceous Chondrite Fragments in the Polymict Eucrite Yamato 791834 [#1299] This study describes two carbonaceous chondrite fragments in an HED polymict breccia. These clasts are important because they represent materials that were in orbital proximity to the HED parent body (4 Vesta).

McCoy T. J. * Wilson L. Benedix G. K. Ketcham R. A Wadhwa M. Davis AM. Vesicular Eucrites: Where and How Did They Form and Why are They So Rare? [#1187] We have conducted CT scanning, BSE imaging and computational modeling of the vesicular eucrite Ibitira. Our work suggests that Ibitira as a dike of -20 em width at depth. C02 was the dominant volatile and occurred at concentrations of -50-200 ppm.

Kurat G.* Varela M. E. Zinner E. Maruoka T. Brandstlitter F. Major, Minor and Trace Elements in Some Glasses from the NWA 1664 Howardite [#1733] NWA 1664 glass objects share features with glasses from other achondrites and with glass inclusions in olivines and glass matrices of chondrules from carbonaceous chondrites. These objects must have a common source with chondritic refractory elemental abundances.

34th LPSC Program ______87 Tonui E. K. * Ngo H. H. Papanastassiou D. A. Rb-Sr and Sm-Nd Study of the D 'Orbigny Angrite [#1812] Rb-Sr and Sm-Nd in the D'Orbigny angrite show a recently disturbed Sm-Nd system, but primitive initial 87Sr-86Sr, which appears characteristic of the angrite parent body.

Fittipaldo M. M. * Jones R. H. Shearer C. K. Trace Element Distribution Between Olivine and Kirschsteinite in Angra Dos Reis [#1229] Kirschsteinite occurs interstitially to olivine grains in olivine aggregates in the Angra dos Reis angrite. Trace element abundances in these two phases in Angra dos Reis are similar to trace element abundances in these phases in LEW86010.

Nyquist L. E.* Shih C. Y. Wiesmann H. Mikouchi T. Fossil 26Al and 53Mn in D'Orbigny and Sahara 99555 and the Timescale for Angrite Magmatism [#1388] Excess 26Mg from decay of 0.72 Ma 26 AI and excess 53Cr from decay of 3.7 Ma 53Mn has been found in the D'Orbigny and Sahara 99555 angrites in minerals having high Al/Mg and Mn/Cr ratios, respectively. These angrites have well-preserved igneous textures, and apparently predate angrite LEW86010.

Boesenberg J. S. * An Oxygen Isotope Mixing Model for the Northwest Africa 011 Basaltic Achondrite [#1239] Four bulk compositions are modeled for the eucrite-like NWA 011 parent body based on oxygen isotope mixing of chondri tic meteorites. Comparisons to the EPB are made. Petrologic constraints are placed on the NW A 011 parent body.

Korotchantseva E. V. * Ivanova M.A. Lorenz C. A. Bouikine A. I. TrieloffM. Nazarov M.A. Promprated P. Anand M. Taylor L. A. Major and Trace Element Chemistry and Ar-Ar Age of the NWA 011 Achondrite [#1575] We present new evidence that NW A 011 is different from HED meteorites. We suggest that its source was relatively oxidized and contained some sulfide phases. 40 Ar-39Ar dating indicates a thermal event at 0.8 Ga and a crystallization age of >3.2 Ga.

88 ______.34th LPSC Program Thursday, March 20, 2003 ORDINARY CHONDRITES: WHO COULD ASK FOR MORE? 1:30 p.m. Salon A

Chairs: G. K. Benedix D. S. Lauretta

Lauretta D. S. * Benedix G. K. McCoy T. J. Olivine-Orthopyroxene Equilibrium in Metal-rich Systems: Applications to Achondrites and Equilibrated Chondrites [#1461] We present thermodynamic calculations that show that compositions of olivine and pyroxene in equilbrium is dependent on such factors as oxygen fugacity, equilibrium temperature and silica activity.

Baker L. Franchi I. A. * Wright I. P. Pillinger C. T. The Oxygen Isotopic Composition of Water Extracted from Unequilibrated Ordinary Chondrites [#1800] The oxygen isotopic composition of water extracted from the unequilibrated ordinary chondrites Semarkona and Bishunpur reveals differences in alteration mineralogy and levels of isotopic enrichment- reflecting key parameters in the alteration process.

Weber I. * Semenenko V. P. Stephan T. Jessberger E. K. TEM Investigation of a "Mysterite" Inclusion from the Krymka LL-Chondrite: Preliminary Results [#1535] We present preliminary results of TEM analyses of mysterite in Kryrnka. The occurrence of crystallized graphite in the fine-grained area is an indicator for metamorphism. The structures of enstatite and an PeS-phase may result from a quenching process.

Smoliar M. I. * Horan M. F. Alexander C. M. O'D. Walker R. J. Re-Os Systematics and HSE Distribution in Meta/from Ochansk (H4) Chondrite [#1506] We report Re-Os isochron for metal separates from the Ochansk (H4) coupled with isotope dilution abundance data for Ru, Pd, Ir, and Pt. Our results demonstrate that the Re-Os system can be applied to dating multiple events in individual chondrites.

Glavin D.P. * Lugmair G. W. Mn-Cr Isotope Systematics in the LL Type Ordinary Chondrite St. Severin [#1276] The dating of ordinary chondrites by the Mn-Cr system yields the times when these meteorites where metamorphosed. The time when this occurred for the LL chondrite St. Severin was 4554.6 ± 1.4 Ma ago. This age as that of other ordinary chondrites agrees quite well with other dating methods.

Pack A.* Shelley M. O'Neill H. St. C. Palme H. An In-Situ Trace Element Study of Refractory Forsterites from Different Types of Unequilibrated Chondrites [#1600] Refractory lithophile elements (RLE) and transition metals were analyzed by LA-ICP-MS in refractory forsterites of carbonaceous ordinary and R-chondrites. High RLE contents require an origin by condensation or crystallization from RLE- enriched melts.

Sharp T. G.* Xie Z. Aramovich C. J. De Carli P. S. Pressure-Temperature Histories of Shock-Induced Melt Veins in Chondrites [#1278] We are using melt-vein mineralogy combined with shock physics and thermal modeling to explore the pressure-temperature histories of the melt veins to constrain shock pressures and durations in chondrites.

Aramovich C. J. * Sharp T. G. Wolf G. The Distribution and Significance of Shock-induced High-Pressure Minerals in Chondrite Skip Wilson [#1355] S6 chondrite Skip Wilson contains a thick (1-4 mm) shock-induced melt vein. The products of both crystallization and solid- state transformations in the melt vein allow us to interpret the shock and post-shock conditions of Skip Wilson.

34th LPSC Program ______89 Rubin A. E.* Post-Shock Annealing and Post-Annealing Shock: Implications for the Thermal and Shock Histories of Ordinary-Chondrite Parent Bodies [#1263] All type-5 and -6 OC classified as shock-stageS 1 or S2 on the basis of the sharp or undulose extinction of olivine appear to have been shocked to stage S3 or higher and then annealed. The S2 OC were probably shocked, annealed to stage S 1 and shocked again to reach stage S2.

Benedix G. K. * Ketcham R. A. McCoy T. J. Wilson L. Vesiculation in Ordinary Chondrites Due to Impact Melting: The "PAT" 9I50I Answers [#1947] Vesicular impact melt meteorites are indicative of burial in cold country rock. Movies will be shown at the talk. Bring your own popcorn.

Schultz L. FrankeL. Welten K. C. * Nishiizumi K. Jull A. J. T. Cosmogenic Records in 18 Ordinary Chondrites from the Dar AI Gani Region, Libya: I Noble Gases [#1398] Noble gas results in 18 DaG meteorites show that contamination with atmospheric noble gases increases with the degree of weathering, whereas loss of cosmogenic 3He and radiogenic gases is not due to weathering but to solar or impact-related heating.

MooreS. R. * Franzen M. Benoit P. H. Sears D. W. G. Holley A. Meyers M. Godsey R. Czlapinski J. The Origin of Chondrites: Metal-Silicate Separation Experiments Under Microgravity Conditions [#1046] The metal/silicate ratio is a distinctive attribute of the meteorite classes. Here, we describe the results of fluidization experiments in microgravity, showing that separation of metal and silicate grains occurs readily, and we suggest that this could occur on parent bodies.

AndreS. L. * McCoy T. J. McCamant J. E. Robinson M.S. Britt D. T. Densities and Porosities of Ordinary Chondrites; Do High Porosity Meteorites Represent Regolith Materials? [#1608] We investigate controls on OC porosity, examine the range of heterogeneity among stones of a single fall, and consider if friable OCs could be potential analogs for low density asteroids or secondary products from asteroids.

90 ______34th LPSC Program Thursday, March 20, 2003 RECENT WATER ON MARS: GROUND WATER, GROUND ICE, AND GULLIES 1:30 p.m. Salon B

Chairs: S. M. Clifford N.G. Barlow

Mellon M. T. * Theory of Ground Ice on Mars and Implications to the Neutron Leakage Flux [#1916] In this work we present new calculations of the geographic and depth distribution of ground ice on Mars and draw comparisons with the inferred distribution of ice from Mars Odyssey Neutron Spectrometer observations.

Clifford S. M. * The Limits of Theoretical Modeling and Geomorphic Interpretation in Assessing the Present Distribution of Subsurface H20 on Mars [#2118] Our ignorance about the heterogeneous nature and thermal evolution of the crust effectively precludes theoretical or geomorphic attempts to identify and quantitatively assess the current geographic and subsurface vertical distribution of ground ice and groundwater on Mars.

Richardson M. I. * McCleese D. J. Mischna M. Vasavada A R. Obliquity, Ice Sheets, and Layered Sediments on Mars: What Spacecraft Observations and Climate Models are Telling Us [#1281] Mars Odyssey GRS data, along with images of recent ground ice and new climate modeling, suggest that the subaerial formation and subsequent slow devolitization of ice sheets may be an important, ongoing process globally, over climate timescales.

Barlow N. G. * Has the Volatile Content of the Martian Substrate Varied over Time? [#1122] We are utilizing the record of impact craters with fluidized ejecta morphologies to determine if the volatile content of subsurface ice reservoirs on Mars have varied over time.

Arfstrom J. D. * Upper Dao Vallis: A Basin Dominated by Ice-rich Viscous Materials [#1208] I present preliminary geomorphic interpretations of Upper Dao Vallis. Ice-rich materials exhibiting viscous-flow features dominate its geomorphology.

Howard A D. * Tongue Ridges and Rumpled Crater Floors in Mid-Southern-Latitude Martian Craters [#1065] Mid-southern latitude craters on Mars exhibit tongue-like ridges extending from the base of south-facing crater walls that enclose smooth, concave floors. These form from retreat of gullied ice fans and massive ice deposits. The ice forces inward flow of ice-rich crater floor deposits.

Hecht M. H.* Bridges N. T. A Mechanism for Recent Production of Liquid Water on Mars [#2073] Seasonal liquid water could be formed in gullies and other sheltered locations on Mars by a process of condensation, concentration, buffering, and melting. In the present epoch this process would yield little more than a trickle of water, but may have been vigorous as little as 20,000 years ago.

Lee P. * McKay C. P. Mars: Always Cold, Sometimes Wet? [#2127] A synthesis of a diverse suite of observations of H20-related landforms that are possible Mars analogs from terrestrial polar regions (Devon Island in the Arctic; the Dry Valleys of Antarctica) put into question any requirement for extended episode(s) of warm and wet climate in Mars's past.

34th LPSC Program ______91 Baker V. R. * Dohm J. M. Ferris J. C. Very Recent Hydroclimatic Change on Mars? [#1435] A globally distributed suite of exceptionally young water-related landforms on Mars (periglacial, volcano-ice, fluvial, glacial) is best explained as produced by long-term, episodic climate change involving both orbital and volcanic forcings.

Motazedian T. * Currently Flowing Water on Mars [#1840] Dark slope streaks on Mars appear to indicate currently flowing water. The dark streaks are concentrated around Olympus Mons. Subsurface ice is melted by geothermal heating, releasing a mineral-rich brine. This brine flows onto the Martian surface, leaving dark streaks of rock varnish.

Reiss D.* Jaumann R. Debris Flows on Mars: Global Distribution and Their Correlation to Present Day Maximum Surface Pressures and Temperatures [#1821] We correlated the global distribution of debris flows with the minimum requirements for liquid water (pressures >6.1 mbar and temperatures >273 K) using a high resolution MOLA-DTM for maximum pressures and maximum TES brightness temperatures.

Thompson J. * Sears D. W. G. Benoit P. H. Kareev M.S. Martian Gullies and the Stability of Water in the Martian Environment [#1035] Results from Odyssey suggest that hydrogen (most likely as water) is common on Mars. Here, we present data on the influence of regolith on groundwater properties, and on the ability of evaporation of water to produce features in regolith.

92 ______.34th LPSC Program Thursday, March 20, 2003 EVOLUTION OF THE EARLY EARTH 1:30 p.m. Salon C

Chairs: T. Rushmer M.J. Drake

Drake M. J. * Domanik K. Bailey E. Vanadium, Cr, Si, and the Mg/Si Ratio of the Earth [#1150] The relatively high abundances ofV and Cr in the Earth's upper mantle indicate that the high Mg/Si ratio of the Earth's upper mantle cannot be attributed to extraction of Si into the core and must be an intrinsic bulk property of the silicate Earth.

Burbine T. H. * O'Brien K. M. Determining Possible Building Blocks of the Earth [#1193] To determine what material could possibly be the building blocks of the Earth, we have looked at hundreds of millions of possible combinations of different chondri tic material to try to match the Earth's oxygen isotopic composition and its bulk chemistry.

Palme H.* O'Neill H. St. C. Benz W. Evidence for Collisional Erosion of the Earth [#1741] The Fe/Mg ratio of the bulk Earth is at least 10% higher than that of the average solar system, reflecting preferential removal of silicates from the Earth by large impacts on the growing Earth or on differentiated Earth forming planetesimals.

Jacobsen S. B. * Yin Q. Hf-W, Accretion of the Earth, Core Formation and the Origin of the Moon [#1913] The main stage of accretion of the Earth is completed in 10 Myr and the remaining growth must be effectively finished in another 20-40 m.y. The formation of the Moon, if by a giant impact, happened at- 25-30 m.y. subsequent to solar system formation.

Brandon A. D.* The Osmium Isotopic Composition ofTagish Lake and Other Chondrites, Implications for Late Terrestrial Planetary Accretion [#1776] Osmium isotopes and highly siderophile element concentrations were measured on Tagish Lake and other chondrites to assess whether these meteorites have the characteristics of potential late accretion materials on Earth and Mars.

Becker L. * Poreda R. J. Nuth J. Fullerenes and the Nature of Planetary Gases [#1482] We present evidence that suggests the Earth's atmosphere was supplied with noble gases from a fullerene component that was Xe-deficient. Subsequent mixing with "solar type gases" from the interior of the Earth ultimately produced the atmosphere that exists today.

Busemann H. * Baur H. Wieler R. Solar Noble Gases in Enstatite Chondrites and Implications for the Formation of the Terrestrial Planets [#1665] We report evidence for tiny amounts of- most likely primordial- noble gases with solar-like elemental and isotopic composition admixed to Q-type primordial noble gases inanE chondrite. We will discuss possible implications ofthis finding for terrestrial planet formation.

34th LPSC Program ______93 Genda H. * Abe Y. Survival of a Protoatmosphere Through the Stage of Giant Impacts [#1623] We examined the relation between the global ground motion exited by giant impact and the loss fraction of atmosphere. Unlike the previous studies, estimated loss fraction is <30%. It should affect the origin and evolution of planetary atmosphere.

Rushmer T. * Humayun M. Campbell A J. Siderophile Elements in Metal Segregated from Partially Molten Ordinary Chondrite: Implications for Early Differentiation Processes [#1174] Siderophile elements have been measured in metallic liquid segregated from partially molten ordinary chondrite. Siderophile concentrations in quench metal are similar to natural liE irons.

Holzheid A * Balog P. Rubie D. C. The Effect of Pressure on Sulfide Melt Distribution in Partially Molten Silicate Aggregates: Implications to Core Formation Scenarios for Terrestrial Planets [#1367] The effect of pressure on the wetting behavior of sulfide melt in partially molten solid silicate matrices was studied. The sulfide melt distribution indicates possible interconnected liquid metal phases in a silicate matrix at higher pressures.

Watson H. C. * Fei Y. Watson E. B. Diffusion of Siderophile Elements in Iron-Nickel Alloys at High Pressure and Temperature [#1871] Experimental determination of diffusion coefficients for several siderophile elements (Au, Re, and Pd) at 10-20 GPa and up to 1600°C in 90 wt% Fe, 10 wt% Ni alloy.

Boyet M. * Rosing M. Blichert-Toft J. Storey M. Albarede F. 142Nd Evidence for Early Earth Differentiation [#1945] Evidence of a 30 ppm 142Nd anomaly in three Greenland metabasalts is presented. The preferred interpretation draws on the formation of thick protocrust in the wake of core segregation.

Papanastassiou D. A * Sharma M. Ngo H. H. Wasserburg G. J. Dymek R. F. No 142Nd Excess in the Early Archean /sua Gneiss IE 715-28 [#1851] We have remeasured, with greatly improved precision, 142Nd in an Archean Isua Gneiss and find no excess in 142Nd, in contrast with an earlier report.

94 ______,34th LPSC Program Thursday, March 20, 2003 PRESOLAR GRAINS: FIVE SERVINGS PER DAY 1:30 p.m. Marina Plaza Ballroom

Chairs: S. R. Messenger R. M. Stroud

Stroud R. M. * Nittler L. R. Alexander C. M. O'D. Bematowicz T. J. MessengerS. R. Transmission Electron Microscopy of Non-Etched Presolar Silicon Carbide [#1755] TEM data from two non-etched presolar SiC grains is reported. The morphologies are distinct from each other and from that of the one previously reported non-etched grain. One grain has a silicate rim.

Smith J. B.* Russ G. R. Isotopic Composition of Silicon Carbide in the C03 Chondrite Colony [#1729] Isotopic compositions of Si, C, and N in SiC from Colony are similar in most respects to those for SiC from Murchison and Orgueil. However, N is not as 14N-rich as in similar-sized SiC from Orgueil. An unusual high-metallicity Y grain was found.

Savina M. R. * Tripa C. E. Pellin M. J. Davis A.M. Clayton R.N. Lewis R. S. AmariS. Isotopic Composition of Molybdenum and Barium in Single Presolar Silicon Carbide Grains of Type A + B [#2079] We report isotopic compositions of Mo and Ba in presolar SiC grains of type A+ B. Most show solar system isotopic compositions; however, one is enhanced in the p-process isotopes 92Mo and 94Mo. This is the first such observation and may help to elucidate the astrophysical site of the p-process.

Davis A. M. * Gallina R. Straniero O. Dominguez I. Lugaro M. Heavy Element Nucleosynthesis in Low Metallicity, Low Mass AGB Stars [#2043] Nucleosynthesis calculations are used to predict the isotopic compositions of Sr, Zr, Mo, Ba and Cain low metallicity asymptotic giant branch stars, which are believed to the source of Types Y and Z presolar SiC grains.

Yoshida T. * Hashimoto M. Supernova Nucleosynthesis and Application to the Isotopic Ratios of Individual Presolar Grains from Supernovae [#1141] We pursue the nucleosynthesis of supernova explosions numerically. Then we investigate how many kinds of isotopic ratios of individual presolar grains from supernovae are reproduced by considering the mixing of the supernova ejecta.

Clayton D. D. * Presolar Galactic Merger Spawned SiC Grain Mainstream [#1059] The puzzling isotopic heaviness of Si in presolar SiC mainstream grains and the puzzling three-isotope correlation slope m = 4/3 are both explained by the presolar merger of the galactic gas with a low-metallicity starburst satellite galaxy.

Stadermann F. J. * Bematowicz T. Croat T. K. Zinner E. MessengerS. AmariS. Titanium and Oxygen Isotopic Compositions of Sub-Micrometer TiC Crystals Within Presolar Graphite [#1627] We have used the NanoSIMS to study Ti isotopes of individual TiC crystals inside a presolar graphite spherule. These measurements were made directly in TEM sections and the results can be compared to previous 0 measurements in the same subgrains.

Hoppe P. * Nittler L. R. Mostefaoui S. Alexander C. M. O'D. Marhas K. K. A NanoSIMS Study of Titanium-Isotopic Compositions of Presolar Corundum Grains [#1570] We report Ti-isotopic data for four presolar corundum grains. These data allow to put constraints on the GCE ofTi isotopes and to test predictions of Ti-isotopic compositions in AGB stars.

34th LPSC Program ______95 Nguyen A. * Zinner E. Lewis R. S. Identification of Presolar Spinel Grains from a Murray Residue by Multi-Detection Raster Imaging [#1637] Multi-detection raster imaging with the NanoSIMS on Murray separate CG led to the identification of 40 presolar spinel grains. This detection mode is an efficient means of locating rare presolar oxide grains.

Nittler L. R. * Hoppe P. Alexander C. M. O'D. Bussa M. Gallina R. Marhas K. K. Nollett K. Magnesium Isotopes in Presolar Spinel [#1703] We report Mg isotopic data for seven presolar spinel grains. Six grains have close-to-solar compositions and are in general agreement with astrophysical models. One grain, OC2, has 0 and Mg isotopic ratios indicating an origin in an intermediate mass star undergoing hot bottom burning.

Croat T. K. * Bernatowicz T. Staderrnann F. J. MessengerS. AmariS. TEM Study of Internal Crystals in Supernova Graphites [#1470] A coordinated TEM and isotopic study of ten supernova (SN) graphites from the Murchison meteorite has revealed many internal grains, mostly titanium carbides (TiCs) and TiC-kamacite composite grains, which were accreted during the graphite growth.

Amari S. * Stadermann F. J. Zinner E. Lewis R. S. Continued Study of Presolar Graphite from Murchison Separate KFAI [#1864] We have analyzed Mg-Al, K, Ca and Ti isotopes in the KFAl graphite grains. Some of the grains show a signature of a supernova origin. Partly due to the high level of contamination of the sample, we are not able to infer any other stellar sources.

MessengerS.* Keller L. P. Walker R. M. Continued Studies of Stardust in IDPs [#1630] We present the results of detailed oxygen isotopic analyses of anhydrous cluster IDPs with the NanoSIMS combined with petrographic analysis using TEM to identify silicate stardust.

96 ______----'34th LPSC Program Thursday, March 20, 2003 POSTER SESSION II 7:00 p.m. Fitness Center

Origins of Planetary Systems

Haghighipour N. Boss A P. Gas-Drag Induced Migration of Solids in the Vicinity of a Density Enhancement in a Non-Uniform Solar Nebula [#1971] We present the results of an extensive numerical study of migration of small solids in the vicinity of density enhancements of a non-uniform solar nebula. We discuss the implications of the results for enhancement of the growth-rate of planetesimals.

Mosqueira I. Estrada P. R. Planetesimal Break-Up and the Feeding of Solids to the Satellite Disk: Consequences for the Formation Timescale and Composition of the Satellites of Jupiter and Saturn [#1832] We consider the processes by which the mass contained in Sun-orbiting planetesimals may be deposited in the satellite disk.

Daisaka H. Makino J. N-Body Simulation of the Uranian Eccentric Rings [#1549] We investigate the formation and maintenance of the Uranian eccentric rings by N-body simulation of a ring-satellite system. Our simulation demonstrates the formation and evolution of an eccentric ring from an initially circular ring.

Ireland T. R. lnitial 182Hf/80Hf and W-Isotopic Systematics of the Early Solar System [#1508] Hf-W systematics are affected by regional metal-silicate fractionation in the solar nebula as well as planetary differentiation.

Basiuk V. A. Kobayashi K. A Theoretical Study of Vinyl Alcohol Formation in the Interstellar Medium [#1085] The formation of interstellar vinyl alcohol can be explained based on the reactions of simple, commonly found and abundant species, such as acetylene and acetylene-related radicals HCC and CC.

Early Evolution of the Terrestrial Planets

Kareem K. M. Byerly G. R. Petrology and Geochemistry of 3.3 Ga Komatiites- Weltevreden Formation, Barberton Greenstone Belt [#2071] In this study, petrographic and geochemical data are presented on extremely fresh komatiites from the Weltevreden Formation, Barberton Greenstone Belt.

Thompson M. E. Kareem K. M. Xie X. Byerly G. R. Fresh Melt Inclusions in 3.3 Ga Komatiitic Olivines from the Barberton Greenstone Belt, South Africa [#2112] Fresh melt inclusions from 3.3 Ga Komatiitic Olivines represent trapped melts modified only by fractional crystallization of olivine and occasionally augite and preserve inter-element ratios of mobile elements that have been removed from the rock.

34th LPSC Program ______97 Schmidt G. Spettel B. Palme H. Arsenic and Sb Abundances in the Earth Mantle [#1581] Mantle derived peridotite xenoliths has been analyzed by INAA for As, Sb and REE. The rarely determined elements As and Sb in mantle rocks have been tried to use as geochemical tracers for understanding fluid-related processes postdating melt extraction processes.

Frank M. R. Fei Y. Watson H. C. Prakapenka V. Density Measurements of Iron-Sulfur Compounds at High Pressures and Temperatures: Implications for the Cores of Terrestrial Planets [#1847] We conducted experiments in the Fe-S system at elevated pressures and temperatures to evaluate the pressure-temperature- volume relations ofFe3S. We provided new density data ofFe3S that are applicable to density models of the Martian core.

Kamer J. M. Papike J. J. Shearer C. K. Comparative Planetary Mineralogy: Basaltic Plagioclase from Earth, Moon, Mars and 4 Vesta [#1028] We explore the major and trace element chemistry of basaltic plagioclase from the Earth, Moon, Mars and 4 Vesta in a comparative planetary mineralogy context.

Jones J. H. A Liquidus Geothermometer for SNC, Lunar, and Eucritic Magmas [#1130] The liquidi of many planetary basalts can be adequately predicted using a single parameterization based on the MgO content of the liquid.

Ford R. Rushmer T. Benedix G. K. McCoy T. J. Filling in the Gap: An Experimental Study on Early Differentiation Processes [#1713] A comparison of experimental partial melting studies on an enstite chondrite (Indarch) and an ordinary chondrite (Kemouve) with focus .f02 conditions.

Hustoft J. W. Kohlstedt D. L. Melt Redistribution in Dynamic Systems: Applications to Core Formation [#1997] Simple shear deformation of olivine+ 5 vol% Fe-S resulted in the development of metallic melt-rich bands that could only have formed by porous flow through solid silicate. This suggests that segregation of metal from silicate by porous flow may be easier than previously thought.

Dauphas N. The Origin of the Terrestrial Atmosphere: Early Fractionation and Cometary Accretion [#1813] The terrestrial atmosphere may have had a dual origin, being a mixture between fractionated nebular gases and accreted cometary volatiles.

Busemann H. Eugster O. Baur H. Wieler R. The Ingredients of the "Subsolar" Noble Gas Component [#1674] On the basis of several experiments on separates of the EH5 chondrite St. Mark's, we will argue that the "subsolar" noble gas component is a mixture of solar-like, Q- and terrestrial noble gases.

Ozima M. Miura Y. N. Podosek F. A. Parentless Radiogenic Noble Gases in Lunar Soils: Evidence for Planet Pollution ofthe Sun? [#1163] Noble gases in lunar soils contain parentless radiogenic components such as 40Ar, 129Xe that have been assigned a lunar origin. However, planet pollution of the Sun may provide a reasonable explanation for the parentless radiogenic components.

98 ______.34th LPSC Program Lunar Remote Sensing: Predictions, Techniques, Results, Archives, and Models

Yokota Y. Honda R. Iijima Y. Mizutani H. New Method of Photometric Correction for Lunar UWIS Images [#1885] We propose the iterative method of photometric correction of the Clementine lunar UVVIS images, in which automatic clustering of multi-band spectrum, and determination of phase function for each spectral group are successively performed.

Shkuratov Y. G. Pieters C. M. Omelchenko V. V. Stankevich D. G. Kaydash V. G. Taylor L.A. Estimates of the Lunar Surface Composition with Clementine Images and LSCC Data [#1258] A new approach based on analysis of spectral and compositional data for lunar samples by the LSCC and using the UVVIS Clementine data with 1 km resolution is proposed to estimate and map the abundance of Ti02, Si02, and FeO, pyroxene and plagioclase content, and maturity degree (1/FeO).

Eliason E. M. Lee E. M. BeckerT. L. Weller L.A. Isbell C. E. Staid M.l. Gaddis L. R. McEwen A. S. Robinson M. S. Duxbury T. Steutel D. Blewett D. T. Lucey P.G. A Near-Infrared (NIR) Global Multispectral Map of the Moon from Clementine [#2093] In May and June of 1994, the NASA/DoD Clementine Mission acquired global, 11-band, multispectral observations of the lunar surface using the UVVIS and NIR cameras. The corresponding NIR DIM has been compiled by the USGS for distribution to the lunar science community.

Hawke B. R. Lawrence D. J. Gillis J. J. Blewett D. T. Lucey P. G. Peterson C. A. Smith G. A. Spudis P. D. Taylor G. J. Spectral Anomalies in the Imbrium Region of the Moon [#1545] A variety of remote sensing data was used to determine the composition and origin of spectral anomalies (Red Spots) in the Imbrium region. Pyroclastic material is largely responsible for producing the spectral anomaly at Archimedes. Gruithuisen Gamma and Delta are volcanic constructs.

Gaddis L. BeckerT. Weller L. Cook D. Richie J. Bennett A. Redding B. Shinaman J. Reviving Lunar Orbiter: Scanning, Archiving, and Cartographic Processing at USGS [#1459] We report on a project to digitize, archive, and process a subset of the Lunar Orbiter photographic data. Our goal is to produce a global, cartographically accurate, cosmetically enhanced, digital photographic mosaic of the Moon using LO data.

Byrne C. J. Correction of Image Motion Smear in Photo from Lunar Orbiter Mission I [#1171] An image processing program improves high resolution Lunar Orbiter photo I-040H of Korolev, smeared by failure of image motion compensation. The correction algorithm is complicated by the nature of the image motion; the amount of motion changed across the image.

Pugacheva S. G. Shevchenko V. V. Photometry of the Moon with AMIEISMART-I: Photometric Parameter as Roughness Index [#1112] The view is taken in the paper that information retrieved from the local surface photometric behaviour of the Moon could be used for the remote sensing analyses of specific targets.

Shevchenko V. V. PinetP. Chevrel S. Pugacheva S. G. Daydou Y. Lunar Photometry and Composition of Ejecta Terrains with AMIE/SMART- I [#1113] A new technique for remote sensing estimation of lunar surface structure by means photometry method is proposed. A close relationship between the photometric characteristics and thorium abundances is elucidated.

Ohtake M. Demura H. Haruyama J. Hirata N. Nakamura R. Sugihara T. Takeda H. Study of the Optical Standard Site for the SELENE Multiband Imager [#1976] The Multiband Imager (MI) is an instrument being developed for the SELENE project. Our study to select the best optical standard site and sample(s) for MI revealed that there are possibilities we can use additional information from Apollo 16 samples.

34th LPSC Program ______99 Haruyama J. Ohtake M. Hirata N. Nakamura R. Matsunaga T. Expected Peiformance of Lunar Imager/SpectroMeter on SELENE [#1565] The Lunar Imager/SpectroMeter (LISM) is a mission instrument package that will be installed on the Selenological and Engineering Explorer. In this paper, we will introduce the expected performance ofLISM flight model.

Berezhnoy A. A. Hasebe N. Hiramoto T. Miyachi T. Yamashita N. Possibility of HandS Detection on the Moon by SELENE Mission [#1210] The content of C and S can be high near the lunar poles. Theoretical calculations of lunar gamma-ray flux show that SELENE gamma-ray spectrometer can detect H and S at the lunar poles if their abundances are higher than 0.03 and 0.5 wt% respectively.

Maurice S. Feldman W. C. Lawrence D. J. Gasnault O. Elphic R. C. Chevrel S. Distribution of Hydrogen at the Surface of the Moon [#1867] First global map of hydrogen implanted within the first 2 m of the lunar regolith.

Sisterson J. M. The Status of Cross Section Measurements for Neutron-induced Reactions Needed for Cosmic Ray Studies [#1326] A summary of the irradiations made to measure the cross sections of relevant neutron-induced reactions needed to understand cosmic ray interactions with lunar rocks and meteorites will be presented.

Dunkin S. K. Grande M. D-CIXS Team X-Ray Spectroscopy of the Lunar Surface Using the D-CIXS Instrument on ESA 's SMART-I Mission to the Moon [#1678] Details of the science objectives and instrument performance of D-CIXS, an X -ray spectrometer on ESA' s SMART -1 mission to the Moon, due for launch in 2003.

Bussey D. B. J. Lucey P. G. Robinson M. S. Spudis P. D. Edwards K. D. Steutel D. Permanent Shadow in Simple Craters near the Lunar Poles [#1897] Simulations of realistic crater topography have been conducted to produce new lower limits on the amount of permanent shadow near both lunar poles. Our new values are larger than previous estimates.

Dissly R. Miller K. L. Murrow D. Van Cleve J. Future Moon Missions: Flight Systems for the Cold, Dark, or Unseen 2003-2013 [#1471] We present our capabilities and recent internal R&D on remote sensing of cold and dark regions, in situ experiments, sample handling, and cryogenic sample return, and apply them to contemporary lunar questions.

Stooke P. J. Exploration Strategies and Landing Sites at the Lunar South Pole [#1265] Seven landing sites near the lunar south pole are identified based on these criteria: availability of adequate sunlight, direct Earth communication, South Pole/Aitken basin ejecta and rover access to potential volatiles in areas of perpetual darkness.

Campbell B. A Campbell D. B. Nolan M. New High-Resolution 70-cm Wavelength Radar Images of the Moon [#1700] Using the Arecibo Observatory 430 MHz radar system, we are collecting new images ofthe lunar surface with spatial resolution of-300m.

Lawson S. L. Rodger A. P. Henderson B. G. BenderS. C. Lucey P. G. Multispectral Thermal Imager Observations of the Moon During Total Eclipse [#1761] Here we present Multispectral Thermal Imager satellite images of the Moon taken during the total lunar eclipse of9 January 2001.

100 ______~34th LPSC Program Lawrence S. J. LauE. Steutel D. Stopar J.D. Wilcox B. B. Lucey P. G. A New Measurement of the Absolute Spectral Reflectance of the Moon [#1269] We present a new ground-based telescopic measurement of the absolute lunar spectral reflectance. We used an atmospheric modeling algorithm to quantify scattering and absorption, permitting the calculation of absolute lunar spectral reflectance.

Helfenstein P. Shepard M. K. A Blind Test of Hapke's Photometric Model [#1968] A blind-test of Hapke's (2002) photometric model was conducted using spectrophotometric observations of 11 well- characterized particle samples. One author attempts to interpret fits of Hapke's model for the undisclosed samples.

Piatek J. L. Hapke B. W. Nelson R. M. Hale AS. Smythe W. D. Size-dependent Measurements of the Scattering Properties of Planetary Regolith Analogs: A Challenge to Theory [#1440] Laboratory measurements of the scattering properties of planetary regolith analogs with particle sizes both smaller and larger than the wavelength are compared with predictions of independent particle scattering theory. The results do not agree.

Nelson R. M. Hapke B. W. Smythe W. D. Hale AS. Piatek J. L. A Study of the Opposition Phase Curve in Low Albedo Media [#1869] The reflectance phase curves of very low albedo materials are consistent with shadowing hiding as the principal contributor although marerials with albedos as low as 13% exhibit a significant contribution from coherent backscattering to the phase curve.

Lunar Geophysics

Williams J. G. Boggs D. H. Ratcliff J. T. Dickey J. O. Lunar Rotation and the Lunar Interior [#1161] Solutions for lunar science parameters continue to improve. A fluid core and strong tidal dissipation are inferred from the effect of dissipation on rotation. In addition, evidence for fluid core oblateness strengthens.

Nakamura Y. Search for Far-Side Deep Moonquakes- A Progress Report [#1160] Cross-correlation of every possible pair of waveforms of non-impact, non-shallow-moonquake seismic events from the Apollo project has greatly expanded the number of confirmed deep moonquakes, possibly including those from the far side.

Bulow R. C. Johnson C. L. Shearer P.M. Comprehensive Processing of the Apollo Lunar Seismic Event Data [#1138] Using new techniques and our processed version of the Apollo seismic data, we focus on: better identification and cataloguing of moonquakes, moonquake locations, and estimating lateral variability in scattering properties of the lunar regolith.

Khan A Lognonne P. Gagnepain-Beyneix J. Chenet H. Mosegaard K. Recent Advances in Lunar Seismology [#1706] Inversion of the Apollo lunar seismic data set in order to obtain information on the elastic moduli and the density structure of the Moon.

34th LPSC Program ______101 Ping J. Heki K. Matumoto K. RISE Group 360-0rders and Degrees Spherical Hannonic Model for Lunar Global Topography and the Corresponding Crustral Thickness [#1301] A topography model, NLT360 is estimated by using spherical harmonic function through 360-orders and degrees. The corresponding lunar Moho topography and crustal thickness are also estimated by assuming a single layered crust on the top of Moho.

Asmar S. W. Schubert G. Nimmo F. Estimations of Lunar Elastic Thickness from Admittance Computations [#1963] Recent updates by Lunar Prospector to the historical lunar gravity dataset provide for a high resolution field. Lunar topography from the Clementine lidar was augmented by radio occultations in the polar regions to provide a global field. Admittance is computed to estimate elastic thickness.

Potts L. V. Leftwich T. Kim H. R. Han S.-C. von Frese R. R. B. Gravity Drilling of Mass Differentiated Planets [#1934] Analysis of satellite-measured gravity and topography can provide crust-to-core mass variation models for considering the geologic evolution of the poorly understood crustal and subcrustal features of the terrestrial planets.

Venus: The Forgotten Planet

Campbell M. M. Campbell T. J. Layered Mafic Intrusive Complexes, Possible Terrestrial Analogues of Venusian Coronae [#1852] Studies of characteristics associated with terrestrial layered mafic intrusives and Venusian coronae indicate some similarities in morphology and origin. Coronae and processes related to their formation may not be unique to Venus.

Stoddard P. R. Jurdy D. M. Uplift of Venus Geoid Highs: Timing from Coronae and Craters [#2129] We look at coronae styles and crater modification to assess the relative timing of the uplift of Beta and Atla regios, Venus.

Lang N. P. Hansen V. L. Geologic Mapping of the Greenaway Quadrangle (V24), Venus [#1990] V24 consists of corona and small shield-sourced flows interacting with ribbon- bearing tessera terrain, pervasively fractured terrain, wrinkle ridges, and spaced lineaments resulting in a geologically complex region. A draft of V24 will be presented.

Aspler L. B. Ernst R. E. Dyke-induced Graben on Venus and Mars: Analogues for Earth's Rock Record? [#1711] Extensive graben on Venus and Mars are thought to have formed due to near-horizontal injection of magma in dykes. Dyke- induced graben analogous to those on Venus and Mars may be more common in Earth's rock record than hitherto appreciated.

Grosfils E. B. Ernst R. E. Magma Reservoirs Feeding Giant Radiating Dike Swanns: Insights from Venus [#1808] Using giant radiating dike swarms from the Nemesis Tessera (Vl4) and Carson (V43) quadrangles as examples, we explore some source region magma reservoir complexities commonly observed and the implications for how such dike swarms form and evolve.

102 ______~34th LPSC Program Krassilnikov A. S. Head J. W. Novae on Venus: Geology, Classification and Scenarios of Evolution [#1218] We studied topography and geology of 64 novae, suggested classification of them and scenarios of their evolution using models of novae formation, including radial dike swarm emplacement, volcanic construction spreading and mantle diapirism.

Kostama V.-P. Aittola M. The Arched Graben of Venusian Corona-Novae [#1144] There are some Venusian corona-nova structures where arcuate graben cut the other features of the structures. These arch- like systems are located on the flanks of the structures and are probably of different origin than the fractures of the annulus.

Stofan E. R. Glaze L. S. Smrekar S. E. Baloga S. M. A Statistical Analysis of Corona Topography: New Insights into Corona Formation and Evolution [#1594] We anticipate that applying statistical analysis tools to specific types of coronae will help constrain the particular causes for the great variations observed in corona morphology. We are currently analyzing corona topography, volcanism and location.

Senft L. E. Kiefer W. S. Crust and Mantle Structure of Large Coronae on Venus [#1468] Gravity data reveals the presence of hot mantle diapirs and active dynamic uplift at large coronae on Venus, including Artemis, Eistla Regio, Dali Chasma, and Heng-0.

Tewksbury C. M. Crustal Plateau Collapse on Venus: Evidence from the Pasom-Mana Region [#1291] The Pasom-mana region consists of a ring 1000 krn across that rises 1-3 krn above a low center and the surrounding plains and that exhibits structures and history consistent with collapse and partial burial of a small uncompensated crustal plateau.

Romeo I. Capote R. Anguita F. Dextral Shear Deformation Belt on Southern Margin of Central Ovda Regia, Venus: Preliminary Results [#1078] A complex shear belt with two domains appears, an inner northern belt with en echelon folds and perpendicular ribbons, and an outer southern belt with sigmoidal ridges between brittle strike-slip faults that show secondary Riedel RP fracture pattern.

Waldron A. C. Blondes M.S. Katzenstein W. P. Grosfils E. B. Geologic Map Interpretations of the Suiface of the Nemesis Tessera (Vl4) Quadrangle, Venus [#1060] Four mappers examine and assess the differences in mapping results for common areas.

Cochrane C. G. Crater Morphometry on Venus [#1173] Progress is reported on the application of the Magellan Stereo Toolkit to craters in a representative area astride Aphrodite Terra.

Hashimoto G. L. Sugita S. Imamura T. A Search for Active Volcanoes and Compositional Variation in Crust on Venus Using Nightside Near-Infrared Thermal Radiation [#1297] The 1.0-micrometer window will allow us to measure the venusian surface based on spacecraft observation and ground-based telescopic observation. Using this window, we will be able to detect active volcanoes and compositional variation on Venus.

34th LPSC Program ______103 Comstock R. L. Bills B. G. A Solar System Survey of Forced Lib rations in Longitude [#1462] We present an analytical method for calculating amplitudes ofphysicallibrations in longitude for resonant, and non-resonant states, and comment on observational challenges, and structural implications for a subset of solar system bodies.

Mars Terrestrial Analogs

Metzger S.M. Promoting a Well-established Study Site for Mars Analog and Desert Process Studies [#2048] Extensive spatial data sets which characterize desert surfaces are herein made available for collaborative investigations into arid region surficial processes, dust devil behavior, and Mars analogs.

Socki R. A. Gibson E. K. Jr. Golden D. C. Ming D. W. McKay G. A. Kinetic Fractionation of Stable Isotopes in Carbonates on Mars: Terrestrial Analogs [#1938] We examine several terrestrial environments known to produce isotopically fractionated carbonate minerals under kinetically controlled processes. We examine these as Martian analogs within the context of an ancient alkali-rich Martian ocean.

Komatsu G. Geological Processes in the Baikal Rift Zone: Potential Terrestrial Analogs for the Valles Marineris Region on Mars [#1314] The Baikal Rift Zone in southern Siberia presents a suit of complex interacting geological processes relevant to the studies of the Valles Marineris region on Mars. The processes include tectonism, volcanism, and hydrology.

Ormo J. Komatsu G. Hydrocarbon Related Bleaching of Strata and Hematite Deposition in Red Beds at Moab, Utah: A Possible Analogous Process that Formed Bright Layers and Hematite Deposits on Mars [#1356] We present a terrestrial hematite occurrence that may have formed by a possible analogous process to the Martian hematite deposits. The proposed process may explain some geological features (e.g. knobs and high albedo rings) that seem to be confined to the hematite areas.

Water on Mars Today (Maybe Yesterday)

Crumpler L. S. Spring Deposits on Mars: Physical Processes from Terrestrial Analogs [#2002] This study evaluates the morphology of spring deposits as it relates to their (1) identification in image data, (2) formation, evolution, and preservation in the environment of Mars, and (3) potential as sites of long-term or late stage shallow groundwater emergence at the surface of Mars.

Travis B. J. On the Impact of Brines on Hydrothermal Circulation Below Martian Permafrost [#2063] A numerical model of hydrothermal circulation with phase change is extended to include salt transport. The model is applied to studying the impact of salt and brine formation on subsurface fluid flow, and contrasted to results obtained for the pure-water case.

Edgett K. S. Malin M. C. Williams R. M. E. Davis S. D. Polar- and Middle-Latitude Martian Gullies: A View from MGS MOC After 2 Mars Years in the Mapping Orbit [#1038] Martian gullies show no preference for poleward-facing slopes. Association with layers and regional clusters suggest relation to aquifers.

104 ______34th LPSC Program Calef F. J. III Sharpton V. L. Description and Hypotheses for Linear Features, Northwest Acidalia Planitia, Mars [#1507] MOC NA images reveal linear features in Acidalia with enigmatic morphologies. While some linear features are undoubtedly created by dust devils, others may be associated with seasonal phase changes of near-surface reservoirs of ground volatiles.

Browning L. Taylor G. J. Pickett D. Minimum Times to Form Clay in Martian Surface and Near-Surface Environments [#1708] We estimate the minimum time required to produce detectable amounts of clay by aqueous alteration of volcanic glasses under different sets of idealized Martian conditions. The effects of glass composition, alteration temperature, pH, and grain size on reaction rates are considered.

Mars Wet And Wild

Palmero A. Sasaki S. Kuzmin R. O. Greeley R. Formation and Sources of the Shalbatana Valley System [#1062] It is proposed that water release from an extensive underground caverns system also took place in excavation of the Shalbatana Valley System.

Collier M. L. Stepinski T. F. Clifford S.M. McGovern P. J. Martian Geomorphology from Statistics of Drainage Networks [#1642] Statistical analysis of 386 drainage networks on Mars is used to pick out different types of terrains. It could be used to measure the degree of surface cratering, and in some cases, to set apart geological units. No global trends have been found.

Stepinski T. F. Vilalta R. Achari M. McGovern P. J. Algorithmic Classification of Drainage Networks on Mars and its Relation to Martian Geological Units [#1653] Drainage networks on Mars are classified algorithmically into nine groups on the basis of topography. This partition does not correlate with existing geological units, instead, it reflects hydrological aspects of Martian landscape morphology.

Burr D. M. Temporary Ponding of Floodwater in Athabasca Vallis, Mars [#1066] Examination ofMOC and MOLA data from the Athabasca Vallis outflow channel, Mars, shows similar elevations for two disparate paleo-flood height indicators. This is best explained by temporary ponding of water behind an impact crater in the channel.

Craddock R. A Presley M. A. Thermal Conductivity Studies of Sedimentary Materials from Central Australia and the Implications for Mars [#1612] A set of criteria for recognizing fluvial deposits from remote sensing data must be established to "follow the water." We are analyzing the thermal characteristics of sedimentary materials from Australia. The fieldwork will be described with a report of the preliminary laboratory analyses.

Grant J. A. Fortezzo C. Hypsometric Analyses of Martian Basins [#1123] Hypsometric analyses of Martian and lunar basins confirm HI values comparable to fluvially-eroded terrestrial basins and suggest the relief in basins created by impact vs. tectonics requires minimal fluvial modification for efficient drainage.

34th LPSC Program ______105 Salamuniccar G. Surface Age Computations for Mars: A Step Toward the Formal Proof of Martian Ocean Recession, Timing and Probability [#1421] Crater statistics based surface age computations for 1/32° MOLA data and two different craters data-sets and comparison with basic Martian period classification on Noachian, Hesperian and Amazonian, indicating ocean influence on crater distribution.

Miyamoto H. Baker V. R. Komatsu G. Semi-Three Dimensional Computer Simulations of Large-scale Cataclysmic Flooding: A Model and Parameter Sensitivities [#1724] We developed a new semi-three dimensional flood simulation code, which is capable of calculating time-slices of flow distribution over a real topography. Using this code, we discuss the relevance of each parameter for the areal spreading of the water.

Kraal E. R. Asphaug E. I. Lorenz R. L. Wave Energy on Mars and Earth: Considering Lacustrine Erosion [#1725] We adapt terrestrial empirical wind wave equations to examine wave energy on Mars. Under certain circumstances, wave energy on Mars could be comparable to terrestrial wave energy. This has implications for the formation of lacustrine features.

Maxwell T. A. Grant J. A. Campbell B. A. Irwin R. III Bourke M. Johnston A. Erasure of First-Order Tributaries Via Climate Change: Lessons for Mars from Earth [#2049] Terrestrial analogs of the headwaters of martian channels indicate that climate change can obliterate traces of small tributaries in a variety of ways.

LorenzR. D. Thermodynamics with a Pinch of Salt: Martian Landscape Energetics [#1248] Melting ice on Mars Carries salt to northern seas Needs much energy

Leverington D. W. Ghent R. R. Irwin R. P. III Craddock R. A. Maxwell T. A. Possible Hydroisostatic Influences on the Collective Geometry of Strandline Features Formed in Association with Ancient Martian Oceans [#1282] Hydroisostatic processes alone may be sufficient to cause ancient Martian oceanic shorelines of common age to vary in elevation by hundreds of meters.

Mars Geomorphology

Pitiss S. E. Sharpton V. L. Evidence for an Aeolian Concentration of Crystalline Hematite Deposits Observed Within Sinus Meridiani [#2038] Hematite-rich areas within Sinus Meridiani may not be the source areas of crystalline hematite but may be a sink where hematite rich sediments collected or were concentrated through density sorting similar to placer formation and then fossilized.

Kuzmin R. O. Zabalueva E. V. Polygonal Terrains on Mars: Preliminary Results of Global Mapping of Their Spatial Distribution [#1912] The preliminary results of the global mapping of the polygonal terrains occurrence on Mars are presented.

l06 ______34th LPSC Program Tuckwell G. W. Controls on the Formation of Polygonally Organised Structures [#1588] Polygonal structures on Earth, Mars and Venus are discussed in the context of numerical models of fault growth. Principal controlling factors on polygon size geometry are mechanical coupling to the underlying layer, and layer thickness.

Berman D. C. Hartmann W. K. Crown D. A. Debris Aprons, Channels, and Volcanoes in the Reull Vallis Region of Mars [#1879] The region surrounding Reull Vallis to the east ofHellas Basin on Mars has a complex geologic history. In this study, debris aprons, channels, and volcanoes in the region are studied using crater counts on MOC imagery.

Thibodeaux C. J. Washington P. A. De Hon R. A. Grain-size Analysis of Maumee and Vedra Channel Sediments (Mars) Using Equilibrium Sediment Transport Theory [#1268] The hydraulic parameters of the two most equilibrated channel cross-sections of Maumee and Vedra indicate that the maximum sediment concentrations were in the pebble to cobble size-range.

Mege D. Gatineau D. Valles Marineris Walls/opes: Evidence for Amazonian Variations in Wallrock Strength and Oblique Crustal Fabric [#1748] Slope angle analysis in Valles Marineris reveals (1) Amazonian changes of morphogenetic conditions, (2) asymmetric sapping channel walls, probably due to oblique buried basement structures.

Collins G. S. Melosh H. J. Acoustic Fluidization and the Extraordinary Mobility of Sturzstroms [#1930] We develop the acoustic fluidization model for the mechanics of sturzstroms (large dry rock avalanches) and discuss the conditions under which this process may facilitate self-sustaining fluid-like flow of large rock avalanches at low driving stresses.

Kreslavsky M. A. Head J. W. North-South Slope Asymmetries on Mars: Statistical Analysis of MOLA Data [#1412] Statistical analysis of along-track slopes in the MOLA data set revealed localized areas of noticeable north-south slope asymmetry, including two narrow latitude zones about 45°, where the equator-facing slopes are steeper.

Russell P. S. Head J. W. III Hecht M. H. Volatile-rich Crater Interior Deposits on Mars: An Energy Balance Model ofModification [#1249] We test the hypothesis that asymmetries in morphology and location of volatile-rich deposits within craters result from asymmetries in local energy balance due mainly to spatial variability of solar insolation and radiative effects of crater walls.

Bulmer M. H. Glaze L. Shockey K. M. Barnouin-Jha O. S. Murphy W. Insights into the Emplacement of Rock Avalanches on Mars [#1225] This study used geomorphic, topographic and statistical analysis ofthe Chaos Jumbles rock avalanches.

Dickson J. L. Head J. W. Large Hesperian Proglacial Lake in Schmidt Valley, Mars: Evidence for Marginal Pitted Sandar Deposits [#1185] We provide evidence that the depressions and valleys found in the plain that separates Cavi Angusti from Schmidt Valley at the South Pole of Mars are indicative of a glacier/lake contact environment, yielding a marginal pitted sandur.

34th LPSC Program ______107 Curomski K. K. Jager K. M. Analysis of the Sub-Surface ofAlba Patera, Mars Using Pit Craters [#1064] Using MOC images, we analyzed the subsurface layers exposed in pit craters on Alba Patera, Mars. We measured the thicknesses of the layers, determined whether or not the layers are continuous, and explored their mode of formation.

Mars Impacts

Barnouin-Jha O. S. Baloga S. Comparing Run-out Efficiency of Fluidized Ejecta on Mars with Terrestrial and Martian Mass Movements [#1599] We broadly characterize the rheology of fluidized ejecta on Mars as it flows during its final stages of emplacement by using the concept of run-out efficiency.

Chappelow J. E. Sharpton V. L. Atmospheric Effects and the Record ofSmall Craters on Mars [#1418] Crater populations and isochrons are used to date surfaces on Mars and its atmosphere is neglected when deriving isochrons. But, even Mars' modern atmosphere may affect cratering rates, and other work shows its past atmosphere may have been denser.

Cho J. Y-K. Stewart S. T. Global Dispersal of Dust Following Impact Cratering Events on Mars [#2101] Using a shallow-water atmospheric dynamics model, we investigate the global dispersion of dust injected into the stratosphere following large impacts to study the spreading rates, dispersal extent, and the potential for climatic effects.

Jaret S. J. Crane AN. Albin E. F. Schiaparelli Basin: Crater Count Chronology and Geologic Evolution of an Ancient Martian Impact Structure [#1438] In this investigation we seek to map the distribution of geomorphic units within and immediately about Schiaparelli impact basin, Mars. Cratering statistics were utilized in order to formulate a geologic history depicting the timing for the implacement of various map units.

Mouginis-Mark P. J. Garbeil H. Boyce J. M. Baloga S. M. Ui C. Measurements of Martian Impact Crater Geometry Via a New Interactive Computer Program [#1472] We have developed an interactive computer program to investigate the geometry of impact craters on Mars using the MOLA l/64th degree DEM. An overview of the program is presented, along with preliminary results for 1,430 craters measured to date.

Magee M. Chapman C. R. Dellenback S. W. Enke B. Merline W. J. Rigney M. P. Automated Identification of Martian Craters Using Image Processing [#1756] Four image processing based methods for automatically detecting craters have been developed and implemented. It is shown that these methods can successfully locate most craters in typical Mars images by enforcing relatively high confidence measures.

Nezic Z. Salamuniccar G. Topography Profile Diagrams of Mars: Algorithms for Computing Altitude of Craters [#1409] Case study of twelve different algorithms for computing crater altitude according to the topography, center coordinates and radius of impact crater, required for computation of density-of-craters curve that is part of topography-profile-diagrams.

108 ______.34th LPSC Program Forsberg-Taylor N. K. Howard A. D. Observations on Spatial Relationships of Impact Crater Floor Morphologies in the Sinus Sabaeus Region of Mars [#1872] We have created a comprehensive database of degradational characteristics of impact craters in the Sinus Sabaeus region of Mars. This information has allowed the observation of spatial relationships of crater floor features.

Sarid A. R. Frey H. V. Roark J. H. Martian Buried Basins and Implications for Characteristics of the Burial Layer and Underlying Suiface [#2019] Visible and buried impact crater populations were compared, using MOLA data, to determine characteristics of the surface and underlying terrain. Results show an absence of early Noachian craters and constant thickness of resurfacing material.

Chauhan R. V. Plaut J. J. Pristine Impact Crater Populations of Mars [#2116] This study focused on obtaining size frequency distributions of pristine crater populations from various terrains of Mars. Images from the Viking Orbiter (VO), Mars Orbital Camera (MOC), and Thermal Emission Imaging System (THEMIS) were utilized for this study.

Reese C. C. Solomatov V. S. Baumgardner J. R. Stegman D. R. Giant Impacts and Thermochemical Martian Mantle Convection: Implications for Tharsis [#1442] The initial thermal and compositional state of Mars was likely heterogeneous as a result of giant impacts. Finite element simulations suggest that impact-induced compositional differentiation may play an important role in Martian evolution.

Mars Aeolian Processes

Williams K. K. Greeley R. Zimbelman J. R. Using Overlapping MOC Images to Search for Dune Movement and to Measure Dune Heights [#1639] Overlapping MOC images have been used to search for dune movement and to measure dune heights. No dune movement was found, but dune heights in Proctor and Rabe were measured at 30--100 m. A possible cinder cone in Proctor has also been identified.

Whelley P. L. Balme M. R. Greeley R. Mars: Dust Devil Tracks in Hellas Basin and Argyre Planitia [#1769] The variation of the areal surface density of Martian dust devil tracks is explored as a function of both Martian season and elevation. Data from two regional study areas, Argyre Planitia and Hellas Basin, are compared.

Bourke M. C. WilsonS. A. Zimbelman J. R. The Variability of Transverse Aeolian Ridges in Troughs on Mars [#2090] A classification of transform ridge variability for troughs on Mars is presented.

Mars Bipolar Syndrome

Takayama K. Yokohata T. Odaka M. Kuramoto K. Response of Residual C02 Ice Cap to Climate Changes on Mars [#1739] We construct a new climate model which can calculate the ice cap topography consistently. We apply it to the partitioning of C02 on Mars which plays an important role in controlling the martian climate, and discuss the past climate change.

34th LPSC Program ______109 Hale A. S. Bass D. S. Tamppari L. K. Water Ice Albedo Variations on the Martian Northern Polar Cap: A Progress Report [#1422] We present an ongoing analysis using MGS MOC and TES data to observe albedo changes in the northern polar cap throughout the summer season.

Tamppari L. K. Hale A. S. Bass D. S. Smith M. D. Using MGS TES Data to Understand Water Cycling in Mars' North Polar Region [#1650] In order to understand the polar dichotomy, our approach is to examine the water transport and cycling issues within the north polar region and in/out of the region on seasonal and annual timescales.

Brightwell S. N. Kargel J. S. Titus T. N. Martian South Polar Deformation and Sublimation Processes [#2077] Within the south polar cap various deformational features have been found, including boudinage, folds, and faults. In addition, distinctive ice and dry-ice sublimation features exist.

Kostama V.-P. Kreslavsky M. A. Head J. W. Morphology of the Northern Plains in the Circumpolar Region, Mars [#1340] Morphology of northern plains in circumpolar region of Mars is studied with the high-resolution MOC images. The focus of this systematic survey is the characteristics and distributions of the surface textures and circular (including impact) features.

Milkovich S.M. Head J. W. III Characterizing Polar Layered Deposits at the Martian North Pole: Current Results and Techniques [#1342] Characterization of the layered terrain within two troughs of the north pole of Mars reveals details of the individual layers which will constrain formation models. Fourier analysis may provide a valuable tool for correlation of layer sequences.

Fishbaugh K. E. Head J. W. III Characteristics of the Mars North Polar Basal Unit and Its Role in the Geologic History of the Region [#1250] We describe the characteristics of the dark, layered unit beneath the north polar cap which could represent part of the "missing" geologic history between the Late Hesperian and Late Amazonian and may currently act as basal ice.

Costard F. Dupeyrat L. Peulvast J.P. Chasma Boreale: The Role of Supra-Glacial Erosion [#1354] The purpose of that study is to characterize the efficiency of the erosional process which would take place during a catastrophic flooding event in the Chasma Boreale (Mars). We performed a detailed numerical analysis of the main parameters affecting the erosion rate during the flooding event.

Pomerantz W. J. Head J. W. III Thumbprint Terrain and Sinuous Troughs with Medial Ridges in the Northern Lowlands of Mars: Assessment of the Glacial Hypothesis Using New Spacecraft Data [#1277] Study evaluating previous hypotheses regarding the thumbprint terrain and associated sinuous troughs with medial ridges in the northern lowlands of Mars. Glacial formation hypotheses in particular reconsidered using data from MOLA.

Finnegan D. Lawson D. E. Zimbelman J. R. Rice J. W. Jr. Terrestrial Glacial Processes: Analogs for Martian Polar Landform Development [#1969] An integrated, field-based understanding of terrestrial glacier and ice sheet processes has broad implications for assessing the landforms and terrain origins of modern and ancient glaciers and ice sheets on Mars.

110 34th LPSC Program Instruments and Techniques for Mars

Lawrence D. J. Elphic R. C. Prettyman T. H. Wiens R. C. Effects of an RTG Power Source on Neutron Spectroscopy Measurements on the Martian Surface [#1763] The neutron spectroscopy technique of measuring near-surface water on the Martian surface is not only feasible with an RTG-power source, but may increase the flexibility of surface science operations by enabling high-precision measurements to be made in minutes.

Herd R. Spray J. Samson C. MillerS. Christie I. 3D Imaging and Modelling with a Space-qualified Laser Camera System: Development of Terrestrial Applications and Potential for Planetary Exploration [#1718] A Laser Camera System has been used to image Earth rocks, meteorites and other objects. Their origin can be discerned and their detailed characteristics can be stored, documented and studied. A version mounted on a rover could aid in Mars or other planetary exploration.

Calle C. I. Buhler C. R. Mantovani J. G. Groop E. E. Buehler M.G. Nowicki A W. A Wheel Electrometer to Measure Electrostatic Fields on the Martian Surface [#1772] A system of embedded sensors that can be incorpo-rated into the wheel of any future mission rover would provide for an unobtrusive way to measure the distribution of electrostatic fields on the Martian surface and to measure variations in soil eletrostatic response.

Stoker C. R. Richter L. Smith W. H. Lemke L. G. Hammer P. Dalton J. B. Glass B. Zent A The Mars Underground Mole (MUM): A Subsurface Penetration Device with In Situ Infrared Reflectance and Raman Spectroscopic Sensing Capability [#1201] Mars Underground Mole is an instrument that bumows underground and performs in situ sensing of hydrated minerals, clays, carbonates, sulfates, ice and organic compounds. It also can bring samples to the surface.

Lucey P. G. Wilcox B. B. Gillis J. J. Hamilton V. E. Mini-SMIFTS: A High Spatial Resolution Thermal Infrared Spectrometer for Mars Landers [#1365] We are developing an imaging infrared spectrometer for Mars landed missions that will provide significantly higher spatial resolution than mini-TES, and collect these data at much higher rates.

Wiens R. C. Maurice S. Cremers D. A Chevrel S. The Applicability of Laser-Induced Breakdown Spectroscopy (LIBS) to Mars Exploration [#1646] Laser Induced Breakdown Spectroscopy is ideally suited to investigate Mars surface elemental composition from an in situ rover.

Cremers D. A Brown K. Gibson L. Ferris M. J. Wiens R. C. Maurice S. Salle B. Analysis of Water lee and lee/Dust Mixtures Using Laser-Induced Breakdown Spectroscopy (LIBS) [#1715] Laser-Induced Breakdown Spectroscopy (LffiS) is being evaluated for the analysis of water ice and ice dust mixtures under Mars atmospheric conditions. Characteristics of the method including element detection limits and the ability to determine ice/dusts ratios are being studied.

Lacour J. L. Salle B. Brennetot R. Vors E. Fichet P. Rivoallan A Fabre C. Dubessy J. Maurice S. Wiens R. C. Cremers D. A Laser Induced Breakdown Spectroscopy Under Martian Conditions: Optimization of Operating Conditions [#1582] Laser Induced Breakdown Spectroscopy for in situ Mars geochemical analysis: optimization of paramaters with a statistical design of experiments.

34th LPSC Program ______111 Swindle T. D. Bode R. Boynton W. V. Kring D. A. Williams M. Chutjian A. Darrach M. R. Cremers D. A. Wiens R. C. Baldwin S. L. AGE (Argon Geochronology Experiment): An Instrument for In Situ Geochronology on the Surface of Mars [#1488] The AGE (Argon Geochronology Experiment) instrument is designed to produce K-Ar and cosmic-ray exposure ages in situ on the surface of Mars with <20% age uncertainty. A combined UA/JPL/LANL project, it uses LIBS and a miniature mass spectrometer.

Stopar J. D. Lucey P. G. Sharma S. K. Hubble H. W. Misra A. K. Perfomance of a Remote Raman System: Defining Remote Raman Efficiency [#1450] In testing the performance of a remote Raman system for lander use, we define "remote Raman efficiency" as the ratio of incident laser irradiance to Raman irradiance emitted from a surface. This efficiency is quantified for rock and mineral samples.

Haskin L. A. Wang A. The Mars Micro beam Raman Spectrometer- An Improved Advanced Brassboard [#1651] An advanced brassboard, the Mars Microbeam Raman Spectrometer is under development for eventual field testing. The new optical train gives improved detection sensitivity and spectral resolution.

Freeman J. J. Wang A. Kuebler K. E. Haskin L.A. Raman Spectroscopic Characterization of the Feldspars- Implications for In Situ Surface Mineral Characterization in Planetary Exploration [#1676] Based on Raman spectral patterns and Raman peak positions, low temperature Or-, Ab-, An-feldspars, high temperature plagioclase, orthoclase, sanidine, and anorthoclase can be distinguished from each others.

Sharma S. K. Beall G. H. Hubble H. W. Misra A. K. Chio C. H. Lucey P. G. Telescopic Raman Measurements of Glasses of Mineral Compositions to a Distance of 10 Meters [#1915] Telescopic Raman measurements are carried out on synthetic fused quartz and plagioclase composition glasses at a distance of 10 m.

Kuebler K. Wang A. Haskin L.A. Jolliff B. L. A Study of Olivine Alteration to Iddingsite Using Raman Spectroscopy [#1953] We present data from an olivine altering to iddingsite: the mineral assemblage and structural changes apparent in the Raman spectra and EMPA data. We also identify spectral features that will be useful indicators of olivine alteration on Mars.

Moller L. E. Tuller M. Baker L. Marshall J. Castiglione P. Kuhlman K. Experimental Study of the Angle of Repose ofSurrogate Martian Dust [#1526] Accumulation of dust particles on solar cells and instruments will be a great challenge in the exploration of Mars. We present a recently developed test module to simulate Mars environmental conditions and measure the angle of repose of mineral dusts on spherical and planar surfaces.

Mazumder M. K. Biris A. S. Trigwell S. Calle C. I. Buhler C. R. Measurement of Mars Dust Particle Size and Electrostatic Charge Distributions Using the E-SPART Analyzer [#1895] Measurements of triboelectrically charged Martian simulant were taken using the E-SP ART Analyzer providing both the size and charge distributions of the particles after contact with stainless steel beads.

Lepper K. Single-Grain Optical Dating Properties of JSC Mars-]: Preliminary Measurements of Radiation Dose Response and Sensitivity Change [#1962] A preliminary evaluation of radiation dose response and measurement induced sensitivity change, two fundamental optical dating properties, of single sand-sized grains extracted from the JSC Mars-1 simulant.

ll2 ______.34th LPSC Program Backman V. Chen K. Ulmer M.P. Wessels B. W. Robinson M.S. An Innovative Light Scattering Technique for Characterizing Martian Soil [#1616] Utilizing a propriety technique we have designed and prototyped a new remote sensing instrument called LSSMOP. This instrument detects DNA, protein, and virus-like organisms as well as gives basic morphologic information at the scale of 30-300 nm.

Hansen C. J. Paige D. A. SPADE: A Rock Crushing and Sample Handling System Developed for Mars Missions [#1527] A rock crusher and sample sorting and distribution system has been developed for use on a surface Mars mission. Prototype hardware has been built and tested. Results of rock crushing tests on 10 standard igneous and sedimentary rocks will be shown.

Yen AS. Kim S. S. Mars Oxidant and Radical Detector [#1293] This instrument is designed to characterize the reactive nature of the martian surface environment and can detect, identify, and quantify radical species in soil samples, including those inferred to be present by the Viking experiments.

Kanik I. Johnson P. V. Beegle L. W. Cooks R. G. Laughlin B. C. Hill H. H. Electrospray lonization/lon Mobility Spectrometer/Cylindrical/on Trap Mass Spectrometer System for In Situ Detection of Organic Compounds [#1292] The potential of an Electrospray Ionization/Ion Mobility Spectrometer/Cylindrical Ion Trap Mass Spectrometer (ESIIIMS/CIT -MS) as an analytical instrument for analyzing samples as part of a suite of instruments on the proposed 2009 Mars Science Lander (MSL) will be demonstrated.

Mars Missions

Smith P. H. The Phoenix Scout Mission [#1855] The Phoenix Scout Mission, selected by NASA to continue into Step 2, flies the 2001 lander and many existing instruments. Landing on the near-surface ice at 65N, it will dig into the soil, explore local geology and chemistry, and test for organic molecules.

Shiomi K. Yamazaki A Yoshikawa I. Takizawa Y. Nakamura M. Post-Launch Calibration of the Planet-B Extreme Ultraviolet Scanner [#1207] Extreme Ultraviolet scanner on the Japanese Mars explorer Planet-B aims at detecting resonantly scattered light helium gas and ions in Martian atmosphere. Onboard calibration was studied with moonlight in the parking orbit around earth.

Wiens R. C. Thiemens M. H. Leshin L. A Clark B. C. Scientific Benefit of a Hypervelocity Mars Atmospheric Sample Capture and Earth Return with the SCIM Mission [#1199] A returned sample of the Mars atmosphere would provide very critical information (e.g., high precision 0-16,-17,-18; C-14) not obtainable by in situ measurements. We discuss science goals achievable with the proposed SCIM sample return mission.

Thompson T. W. Horttor R. L. Acton C. H. Jr. Arroyo B. Butman S Jepsen P. L. Johnson W. T. K. Plaut J. J. Holmes D.P. Vaisnys A. The Mars Express/NASA Project at JPL [#1661] This report provides an overview of NASA's contribution to ESA- a Mars Express Mission.

34th LPSC Program _ 113 MartinP. D. Investigating the Spectral and Compositional Properties of the Martian Surface Using HRSC, OMEGA, PFS and SPICAM Onboard the ESA Mars Express Mission [#1648] Spectral and compositional investigations will be carried out on the unprecedented stereo images, multi-/hyper-spectral visible/near-infrared data sets, and UV-infrared spectra to be returned by the ESA Mars Express mission.

Bonello G. Bibring J.P. Morris R. V. Mustard J. F. OMEGA Observations of Mars Analogue Rocks [#1664] We present the reflectance measurements made with OMEGA during on ground calibration sessions on natural slabs of rocks. We discuss the implication on the OMEGA scientific capabilities.

DiLorenzo S. Rossi A. P. Possible Geological Scenarios for the MARSIS Experiment [#1850] The aim of this work is to simulate the MARS IS response on plausible geological scenarios and help in interpreting future data acquired by the instrument.

Gulick V. C. Morris R. L. Gazis P. Bishop J. L. Alena R. HartS. D. Horton A. Automated Rock Identification for Future Mars Exploration Missions [#2103] This abstract summarizes our progress on the Geologist's Field Assistant project to develop an automated rock identification system. For igneous rocks, preliminary tests indicate that our algorithms are able to distinguish plutonic vs. volcanic rocks with approx. 90% success.

Stein T. C. Arvidson R. E. FIDO Analyst's Notebook: An Approach to Integrating Science Data for Rover Mission Playback [#1911] The FIDO Analyst's Notebook is an online resource that serves as the primary data archive and provides a mechanism for "playing back" FIDO rover field trials held between Oct 1999 and Aug 2002. Science data and documentation are integrated into a standard interface for easy browsing and retrieval.

Yingst R. A. Haldemann A. F. C. Lemmon M. T. Classification of Mars Pathfinder Rock Surfaces Using Quantitative Morphologic Indices [#1081] We have examined rock morphology in two regions of the MPF landing site and have correlated this with spectral data extracted from associated rock surfaces, with the goal of improving the likelihood of discerning between rock surface spectral types.

Michael G. G. Chicarro A. F. Rodionova J. F. Shevchenko V. V. Iluhina J. Kozlova E. A. Beagle-2 Landing Site Atlas [#1695] We are compiling an atlas of the presently available data products pertinent to the Beagle-2 landing site at 11.6N 90.75E, which is intended for distribution both as a printed and an electronic resource.

CAis: Refractory Direct to You

Russell S. S. Krot A. N. Jeffries T. E. Ulyanov A. A. Rare Earth Element Systematics of Fine Grained Calcium-Aluminium-rich Inclusions and Amoeboid Olivine Aggregates from Efremovka (CV3) [#1631] Most Efremovka fine grained CAis measured have Group II REE patterns, but one, which may contain relict hibonite, has a Group III pattern. AOAs are typically unfractioned. The data suggest these two groups of objects formed in different regions of the accretion disk.

Amelin Y. Stern R. Krot A. N. Distribution of U, Th, Pb and Nd Between Minerals in Chondrules and CAis [#1200] Distribution of U between minerals in chondrules from Richardton chondrite measured on SHRIMP-II in high resolution mode shows that low-Ca pyroxene is a main host of silicate U.

1l4 ______.34th LPSC Program Sugiura N. Mizuno T. Ushikubo T. Hiyagon H. Si and Mg Isotope Fractionations in Melilite in Type B CAls Measured by SIMS [#1307] Si and Mg isotope fractionation in three type B CAis were measured by SIMS. The Si and Mg fractionations are constant within a CAL The average Si and Mg isotope fractionations are correlated among the three CAis.

Huss G. R. Hutcheon I. D. Krot AN. Tachibana S. Oxygen Isotopes in Refractory Inclusions from the Adelaide Carbonaceous Chondrite [#1802] We measured 0 isotopes for 12 refractory inclusions from the Adelaide anomalous carbonaceous chondrite. CAis are uniformly 160-rich (except when melilite is weathered). Compound objects with refractory components have a range of 0 compositions.

Fagan T. J. Krot AN. Yurimoto H. Petrology and Oxygen Isotope Compositions of Refractory Inclusions from Acfer 094 [#1274] CAis and AOAs from Acfer 094 are dominated by a 160-rich signal similar to refractory objects from other chondrites. Depletions of 160 in a diopside rim and in igneous melilite must have been pre-asteroidal due to the primitive nature of Acfer 094.

Nagasawa H. Kinetics of Partial Melting of Melilite Solid Solution in the Temperature Range Between Solidus and Liquidus [#1164] Synthesized crystals ofmelilite solid solution (Ge50Ak50) were heated at about 1415°C, within the temperature range between solidus and liquidus for 5 min to 50 hrs and quenched at room temperature. Kinetics of partial melting is discussed.

Ott U. Merchel S. Knie K. Korschinek G. Faestermann Th. Rugel G. Wallner A Platinum in Presolar Nanodiamond Residues- An AMS Approach [#1167] Pt isotopes have been measured in presolar nanodiamond residues by AMS. An upper limit to the abundance of 198Pt-H of -1 x 1014 atoms/g is inferred.

Koscheev A P. Serzhantov A E. Merchel S. Ott U. Guillois O. Reynaud C. Swface Chemistry of Chemically Treated Diamond Nanograins [#1287] The effect of chemical extraction procedure used to isolate presolar diamond grains from meteorites on the chemical features of synthetic nanodiamonds was studied by means of 1R spectroscopy and mass spectrometry.

Ordinary Chondrites: Who Could Ask for More?

Mohapatra R. K. Herrmann S. Ott U. Nitrogen, Argon and Xenon in Happy Canyon E Chondrite [#1554] Here we report on the analysis of a 0.68 mg sample of Happy Canyon (EL6) simultaneously for its nitrogen and noble gas isotopic compositions, as part of an ongoing study of EC.

Berlin J. Lingemann C. M. StOffler D. Visible and Near-Infrared Reflectance Spectra ofRumuruti [#1764] The meteorite Rumuruti is ideal for VNlR reflectance spectroscopy, because it is the only fall of the R chondrite group. We conducted measurements in the range of 0.5-2.5 JLm for three different lithologies on raw saw-cut surfaces of Rumuruti.

Welten K. C. Nishiizurni K. Finkel R. C. Hillegonds D. J. Jull A J. T. Schultz L. Cosmogenic Records in I 8 Ordinary Chondrites from the Dar Al Gani Region, Libya: II. Radionuclides [#1866] Radionuclide measurements of 18 DaG meteorites show that most have terrestrial ages <30 kyr, whereas DaG 343 has an age of 160 kyr. Five meteorites show evidence of a large pre-atmospheric size, while DaG 908 experienced a complex exposure history.

34th LPSC Program ______115 Xie Z. Sharp T. G. TEM Observations ofAmorphized Silicate-Perovskite, Akimotoite and Ca-rich Majorite in a Shock-induced Melt Vein in the Tenham L6 Chondrite [#1469] Two mineral assemblages in the melt vein ofTenham constrain crystallization pressure at- 25 GPa, over a period of about 20 ms. Crystallization is unlikely to have occurred during pressure release, therefore the crystallization pressure represents the equilibrium shock pressure.

Herd R. K. Hunt P. A. Venance K. E. Killgore M. B. Comparative Textural and Mineralogical Studies of Two Primitive Ordinary Chondrites: Saratov (LA) and an Unnamed (ULL3) from Antarctica [#2058] Petrological descriptions of the Saratov (L4) fall are lacking in the scientific literature. During study of an Antarctic (LILL3) find, Saratov has also been examined because of its grade. Both meteorites have very similar but non-identical chondrule textures and histories.

Cole K. J. Sipiera P. P. Kilabo and Bensour: A Comparative Study ofTwo Recent LL6 Falls from Africa [#1135] A comparative study of two recent LL6 meteorite falls, Bensour (Feb 2002) and Kilabo (July 2002) suggests a possible relationship between the two meteorites and a common parent body.

Hill D. H. Patzer A. Boynton W. V. JaH 031: A New LL Chondrite Breccia from Oman [#1926] We report on a new LL chondrite breccia from Oman: JaH 031. I contains equilibrated chondrite clasts with thick melt veins. Mineralogical, major, and trace element analyses are reported for clasts and melt veins.

Dixon E. T. Bogard D. D. Rubin A. E. 39Ar-40Ar Evidence for an -4.26 Ga Impact Heating Event on the LL Parent Body [#1108] Miller Range 99301 (unbrecciated, LL6) has shock grade indicators that suggest both unshocked and highly shocked conditions. 39 Ar-40 Ar chronology shows these inconsistent shock indicators are consistent with impact events, followed by partial annealing from the heat produced by impacts.

Lorenz C. Kurat G. Brandstatter F. Nazarov M. A. NWA 1235: A Phlogopite-bearing Enstatite Meteorite [#1211] NWA 1235 achondrite was formed from an enstatite meteorite source under more oxidized conditions than enstatite meteorites. Its unique features are unusual composition of sulfides, a wide set of microinclusions and the occurrence of fluorphlogopite.

MaP. Herzog G. F. Faestermann T. Knie K. Korschinek G. Rugel G. Wallner A. Schultz L. Johnson J. Jull A. J. T. Fink D. Exposure Histories of Seven Ordinary Chondrites with Helium-3 Losses [#1673] Among seven chondrites with He losses and 21 Ne < 1 x 10-8 cm3 STP/g, simple cosmic-ray exposure histories are likely for three (Daraj 115, Staelldalen, and Ybbsitz) but ambiguous for four (ALH 88004, Indio Rico, Markovka, and HaH 002). Daraj 115 may show SCR effects.

Leya I. Wieler R. Production Rates and Production Rate Ratios for Cosmogenic Kr Isotopes in H-Chondrites Based on Chlorine-36/Argon-36 Ages [#1219] We present the 81 Kr-Kr derived exposure ages for H-chondrites which were recently investigated for their 36Cl-36 Ar ages.

Bischoff A. Zipfel J. Mineralogy of the Neuschwanstein (EL6) Chondrite- First Results [#1212] The Neuschwanstein meteorite is a new fall from Germany and fell April 6, 2002. Based on mineralogy and chemistry it is classified as an EL6 chondrite.

116 ______.34th LPSC Program Zipfel J. Spettel B. Schonbeck T. Palme H. Bischoff A. Bulk Chemistry of the Neuschwanstein (EL6) Chondrite- First Results [#1640] Bulk chemical composition, including major and trace elements, of a recent enstatite chondrite fall in Neuschwanstein, Germany. Based on major and minor elements it is shown that Neuschwanstein has a bulk composition typical ofEL6 chondrites but slightly higher metal contents.

Okazaki R. Huss G. R. Oxygen Isotopic Composition of Individual Chondrules in an Enstatite Chondrite Yamato 791810 [#1791] Oxygen isotopes were measured for chondrules from an EH4-chondrite to elucidate the origin of noble-gas-rich chondrules. A porphyritic pyroxene chondrule shows 160 excess and internal variation, suggesting that the precursor contams. 160-nc . h grams. .

Achondrites to Zchondrites

Kollar D. Masarik J. Nishiizumi K. Reedy R. C. Monte Carlo Simulation of Cosmogenic Nuclide Production in the Brenham Pallasite [#1670] Depth-dependent production rates of cosmogenic nuclides were calculated for the Brenham pallasite. The preatmospheric radius of Brenham was 4--6 meters. The quality of some cross sections used for the calculations need to be improved.

Gillies D. C. Engel H. P. Carpenter P. K. Three Dimensional Characterization of the Mundrabilla Meteorite [#1666] Computed Tomography using a cobalt source has been used to examine the three dimensional structure of the Mundrabilla meteorite. The two-phase nature, namely metal with 25% sulfide is clearly shown, as is the presence of graphite-rich cones and small silicate inclusions.

Garrison D. Bogard D. 39Ar- 40Ar Dating of Two Angrites and Two Brachinites [#1069] We report the first 39 Ar-40 Ar age dating results for two brachinites and two angrites, two rare types of differentiated meteorites possessing low potassium concentrations.

Yanai K. Possible Xenolith and Xenocrysts of Olivine in the Asuka-881371 Angrite Collected from Antarctica [#1205] Angrite is the oldest aged rock in all meteorites. Asuka-881371 angrite include some xenolith-xenocrysts like olivine aggragate and/ or large olivine grains. They are differ from any olivine in host for their occurrences, texture and compositions.

Schwartz J. M. McCallum I. S. Comparative Study of Equilibrated and Unequilibrated Eucrites: Subsolidus Thermal History of Haraiya and Pasamonte Eucrites [#1246] Thermal histories of Haraiya and Pasamonte eucrites reveal a 3 order of magnitude difference in cooling rates and evidence for cryptic metasomatism as a mechanism for Fe-Mg pyroxene equilibration.

Mittlefehldt D. W. Killgore M. Northwest Africa 1401: A Polymict Cumulate Eucrite with a Unique Ferroan Heteradcumulate Mafic Clast [#1251] Petrologic study of Northwest Africa 1401 reveals that it is an unusual polymict cumulate eucrite that contains a unique ferroan clast. This clast appears to represent a heteradcumulate from an evolved magma. Film at 11 :00.

Setoyanagi T. Ebihara M. Yamaguchi A. Chemical Compositions of Three Antarctic Monomict Eucrites A87272, A881467, and A881747 [#1593] We performed a geochemical study of three Antarctic monomict eucrites, which experienced different degrees of thermal metamorphism to infer the petrogenesis with the early evolution of eucritic crust.

34th LPSC Program ______117 Domanik K. J. Shearer C. K. Hagerty J. Kolar S. E. Drake M. J. Trace Elements in High-Ca Pyroxene & Plagioclase in the Bilanga Diogenite: Implications for the Magmatic Evolution of Diogenites [#2042] The trace element contents of high-Ca pyroxene and plagioclase were measured in trapped intercumulus melt and exotic clasts in the Bilanga Diogenite. Results indicate significant crystallization of orthopyroxene and plagioclase.

McLeish E. R. Treiman A. H. Textures and Fragment Size Distributions in Diogenite (HED) Meteorites: Processes and Geological Settings [#1407] Brecciated diogenite meteorites occur in two textural patterns: fragmental and granular. Sizes of fragments in the former follow a power-law distribution (i.e., are scale-invariant). Granular diogenites are compact rocks, with shear boundaries between their fragments.

Promprated P. Taylor L.A. Anand M. Rumble D. III Korochantseva E. V. Ivanova M.A. Lorentz C. A. Nazarov M. A. Petrology and Oxygen Isotopic Compositions ofAnomalous Achondrite NWA 011 [#1757] This study confirms that Northwest Africa 011 has anomalous 0-isotopic compositions and higher Fe/Mn ratios, compared to eucrites. It possibly represents a new type of achondritic basaltic meteorite, with no apparent genetic relationship with eucrites.

Patzer A. Hill D. H. Boynton W. V. An Extended Classification Scheme for the Acapulcoites and Lodranites [#1352] We present a comprehensive chemical study of 15 acapulcoites and lodranites and introduce an extended classification scheme that takes into account the chemical and petrographic diversity of the investigated clan members.

Martian Meteorites: We Come in Pieces

Corrigan C. M. Harvey R. P. Evidence for a Second Generation of Magnesite in Martian Meteorite Allan Hills 84001 [#1255] Evidence shows that magnesite found in contact with the hi-Ca portion of carbonate slabs in ALH84001 may be the result of yet another generation of carbonate growth in the rock.

Koziol A.M. Magnetite-Magnesioferrite Phase Relations and Application to ALH84001 [#1128] Magnesioferrite (MgFe20 4) or magnetite + MgO may form from decarbonation of siderite-magnesite. This depends on temperature and .f02. For ALH8400 1, formation of magnetite ± MgO via decarbonation reactions would require low }02 (near mt-wi.i).

Lauer H. V. Jr. Ming D. W. Golden D. C. Thermal Analysis ofAcicular Shaped Magnetite [#1341] Acicular magnetite formed from well-crystalline goethite heated under reducing condititons has been analyzed in a controlled atmosphere DSC/EGA system. We report on the effect of formation temperature on the measured thermal parameters of the acicular magnetite.

Grady M. M. Wright I. P. Carbon Reservoirs on Mars: Constraints from Martian Meteorites [#1312] We have measured the abundance and stable isotopic composition of magmatic carbon extracted from a suite of shergottites. The results confirm previous findings that primordial carbon on Mars is isotopically lighter than that of the Earth.

118 34th LPSC Program Bailey J. V. McKay D. S. Wentworth S. J. Mn Carbonates in the Martian Meteorite Nakhla: Possible Evidence of Brine Evaporation [#2060] This study presents SEM and EDS analysis of a compositionally and texturally complex carbonate from the Mars Meteorite Nakhla. Models and constraints of its petrogenesis are presented.

Mikouchi T. Koizumi E. Monkawa A. Ueda Y. Miyamoto M. Mineralogical Comparison ofY000593 with Other Nakhlites: Implications for Relative Burial Depths ofNakhlites [#1883] We studied Y000593 and other four nakhlites and found that there is a correlation between the mesostasis abundance and mineral compositions and sizes, probably reflecting relative burial depths in the same cumulate pile.

Misawa K. Shih C.-Y. Wiesmann H. Nyquist L. E. Crystallization and Alteration Ages of the Antarctic Nakhlite Yamato 000593 [#1556] We present Rb-Sr and Sm-Nd isochron data for Yamato 000593 and discuss the age correlation with other nakhlites and the timing of aqueous alteration on Mars. The concordancy of Sm-Nd and Rb-Sr ages suggests that Y000593 crystallized 1.30 Ga ago.

Dreibus G. Huisl W. Spettel B. Haubold R. Comparison of the Chemistry ofY-000593 and Y-000749 with Other Nakhlites [#1586] The two paired Martian meteorites Y-000593 and Y-000749 have a similar chemical composition as found for Nakhla and Lafayette. However, the Cl and Br concentrations are much lower than in Nakhla but close to those in Lafayette.

Szymanski A. Brenker F. E. El Goresy A. Palme H. Complex Thermal History of Nakhla and Y000593 [#1922] The thermal history of Nakhla and Y000593 was studied by applying several geo-thermometers and by studying microstructures with TEM. Evidence for a two stage cooling history is obtained.

Delaney J. S. Dyar M. D. Comparison of Synchrotron MicroXANES Determination of Fe3+/IF'e with Mossbauer Values for Clean Mineral Separates of Pyroxene from Martian Meteorites [#1979] Measurements of ferric/ferrous ratios by synchrotron rnicroXANES have been checked against Mossbauer results for mineral separates with good results. The significance of ferric contents in pyroxene remains to be interpreted.

Fritz J. Greshake A. SWffler D. Launch Conditions for Martian Meteorites: Plagioclase as a Shock Pressure Barometer [#1335] To define the piT launch window for martian surface rocks the final equilibration shock pressure of 16 martian meteorites was estimated. We used the shock pressure dependent reduction of the refractive index for maskelynite as a pressure barometer.

Schwenzer S. P. Mohapatra R. K. Herrmann S. Ott U. Nitrogen and Heavy Noble Gases in Sands That Hosted Sayh Al Uhaymir 008 in the Oman Desert [#1694] We have studied N, Kr, and Xe in soil from the Oman desert. The results bear on the acquisition of low temperature noble gases during weathering in hot deserts.

Guan Y. Hsu W. Leshin L.A. Wang H. Wang R. Zhang F. Lin C. Zhang W. Hydrogen Isotopes of Phosphates in the New Martian Meteorite GRV 99027 [#1830] Water in GRV 99027 phosphate grains yields high and variable D/H ratios that are consistent with previous analyses of apatite in martian meteorites, confirming GRV 99027 as the fourth known lherzolitic shergottite.

34th LPSC Program 119 Park J. Okazaki R. Nagao K. Noble Gas Studies on Martian Meteorites: Dar AI Gani 4761489, Sayh AI Uhaymir 005/060, Dhofar OI9, Los Angeles OOI and Zagami [#1213] We report the concentrations and isotopic ratios of noble gases of DaG 489, SaU 005/060, DHO 019, LA 001 and Zagami. Based on 81 Kr-Kr apparent ages, the long terrestrial ages of DaG 476 and DHO 019 are also calculated. The concentrations of 8°Kr produced by neutron capture from Br were calculated.

Irving A. J. Kuehner S.M. Petrology ofNWA I460: A Baddeleyite-bearing Shergottite Paired with NWA 480 [#1503] NWA 1460 is a shergottite from Morocco that almost certainly is paired with NWA 480 found one year earlier. NW A 1460 contains accessory baddeleyite which may be amenable to U-Pb dating.

Goodrich C. A. van Niekerk D. Morgan M. L. Northwest Africa IIJO: A New Olivine-Phyric Shergottite Possibly Paired with Northwest Africa I068 [#1266] NWA 1110 is a new olivine-phyric shergottite. Its modal mineralogy, texture, and mineral compositions are similar to those of NWA 1068. Estimates of oxygen fugacity from early chromite indicate that it crystallized under more oxidizing conditions than other olivine-phyric shergottites.

Borg L. E. Draper D. S. A Petrological Model for the Origin of Martian Shergottite Magmas Based on Their Major Element, Trace Element, and Isotopic Compositions [#1169] Combined modeling of major and trace element data of a martian magma ocean constrains the source regions of shergottite magmas.

Asteroids and Comets

Binzel R. P. Harris A. W. BusS. J. Rivkin A. S. Burbine T. H. SMASS Near-Earth Object Survey: An Album of Results [#1254] This poster presents a "family album" of visible and near-infrared spectra for more than 300 near-Earth objects. These data were obtained through the Small Main-Belt Asteroid Spectroscopic Survey (SMASS) program.

Rivkin A. S. Hiroi T. Horz F. Cintala M. Pierazzo E. Spectroscopy of Impacted Serpentine: Implications for Asteroid Surfaces [#1716] We present visible and infrared spectroscopy of serpentine samples which have been subjected to impact. The impact stresses range from 20-41 GPa.

Cheng A. F. Barnouoin-Jha O. Highest Resolution Topography of433 Eros and Implications for MUSES-C [#1353] The highest resolution observations of surface morphology and topography of Eros from the NEAR landing provide unique information on rock distributions and landing hazards. The rock areal coverage is 18%, and one topographic feature would have been hazardous.

Cloutis E. A. Dark Asteroids: Insights into Surface Composition from Coal Spectra [#1067] Reflectance spectra of coals provide valuable insights into the possible surface compositions of dark asteroids. These data suggest that only the most red-sloped asteroid spectra will exhibit organic-associated absorption bands.

Ueda Y. Miyamoto M. Mikouchi T. Hiroi T. Surface Material Analysis of the S-Type Asteroids: Removing the Space Weathering Effect from Reflectance Spectrum [#2078] We removed the space weathering effect from reflectance spectra of asteroids 7 Iris and 532 Herculina. After removing, they had similar features to that of L or LL chondrite. This suggests the connection between ordinary chondrite and two asteroids.

120 ______.34th LPSC Program Clark P. E. Killen R. Understanding the Nature of Metal Segregation in Asteroid Regolith [#1868] We discuss how segregating a metallic component would modify the apparent element and mineral abundance ratios relative to the parent material and the impact such a process would have on remote spectral measurements.

Holsapple K. A. On Nuking Menacing Asteroids [#1799] I present recent results for the effectiveness of diverting menacing asteroids using nuclear weapons. Surface burst will not work for porous asteroids. Standoff weapons will be effective only if detonated very close to the surface.

Kikwaya J.-B. Thuillot W. Rocher P. Viera Martins R. Arlot J.-E. Angeli Cl. Does 146 Lucina Have a Satellite? An Astrometric Approach [#1214] An astrometric technique is described for finding and characterizing asteroid satellites. This technique has been applied to observations of asteroid 146 Lucina, which suggests that it may have a satellite.

DurdaD. D. Discontinuities in Size-Strength Scaling Laws: Another Source of Wavy Size Distributions [#1932] Particle size distributions in mutually-colliding systems are dependent upon the strength properties of the particles. Discontinuities in the size-strength scaling relations at small particle sizes can induce significant waves in evolved size distributions.

Watters T. R. Robinson M.S. Boundary Element Modeling of the Rahe Dorsum Thrust Fault on Asteroid 433 Eros [#1928] Rahe Dorsum is one of the most striking features on the surface of Eros and strongly resembles landforms called lobate scarps found on terrestrial planets interpreted to be the surface expression of thrust faults.

Gladman B. Transfer of Mercurian Impact Ejecta to Earth and Implications for Mercurian Meteorites [#1933] The transfer efficiency of impact ejecta from Mercury to the Earth is calculated to be of order 0.1 %. Implications for the possibility of meteorites from Mercury are explored.

Liou J.-C. Kessler D. J. Matney M. Stansbery E. A New Approach to Evaluate Collision Probabilities Among Asteroids, Comets, and Kuiper Belt Objects [#1828] This is a new approach to evaluate the long-term collision probabilities among asteroids, comets, and Kuiper Belt objects. This new method is based on uniform sampling in time and is more general than the classical method.

Interplanetary Dust and Micrometeorites

Moister F. J. Demyk A. d'Hendecourt L. Bradley J.P. The First 2-50 !lm Infrared Spectrum of an Interplanetary Dust Particle (IDP) [#1148] Comparing the properties of IDPs with dust grains around other (young) stars, requires the infrared characteristics of IDPs. We show the first infrared spectrum of an IDP up to 50 microns, covering the main fingerprint area of minerals.

Lever J. H. TaylorS. Potential for a Time-sequenced 100,000-Year Record of Micrometeorites at South Pole [#1644] We propose to collect and analyze a high-resolution 100,000-yr record of micrometeorites and terrestrial dust to study the evolution of near-Earth cosmic dust, the link between ET influx and climate change, and biogenic materials in Antarctic ice.

34th LPSC Program ______121 Duprat J. Engrand C. Maurette M. Gounelle M. Hammer C. Kurat G. The CONCORDIA -Collection: Pristine Contemporary Micrometeorites from Central Antarctica Surface Snow [#1727] Using a new collection technique, we recovered micrometeorites trapped in central Antarctic surface snow. They are characterized by minimal terrestrial weathering compared to the previous collections in the ice at the coast of the continent.

Flynn G. J. Lanzirotti A. Westphal A. J. Dominguez G. Snead C. Chemical and Mineralogical Analysis of an Extraterrestrial Particle in Aerogel [#1814] Particle 2D03No.l, captured in aerogel on the MIR Space Station, is chondri tic in its Cr/Fe, Mn/Fe, and Ni/Fe contents, indicating that it is extraterrestrial. This particle exhibits an x-ray diffraction pattern consistent with fayalitic olivine.

Joswiak D. J. Brownlee D. E. 'Normal' Fe-Mg-Al-Cr Spinel Minerals in Chondritic Stratospheric IDPs [#1843] 'Normal' Fe-Mg-AI-Cr spinel minerals were studied in 15 chondritic stratospheric IDPs. Most were likely to have formed in the interiors of the IDPs by atmospheric entry heating but some may be condensates from the solar nebula.

Feser M. Wirick S. Flynn G. J. Keller L. P. Combined Carbon, Nitrogen, and Oxygen XANES Spectroscopy on Hydrated and Anhydrous Interplanetary Dust Particles [#1875] We have obtained carbon-, oxygen-, and the first nitrogen-XANES spectra of a hydrated and of an anhydrous IDP, and found percent-level nitrogen in each of the two IDP.

Brownlee D. E. Joswiak D. J. Disaggregating IDPs [#1954] Some IDPs appear to be primitive aggregates of sub-micron solar nebula grains. In this work we disagregate particles to isolate the orginal pre-accretion components.

Dominguez G. Westphal A. J. Phillips M. L. F. Jones S.M. A Fluorescent Aerogel for Capture and Identification of Interplanetary and Interstellar Dust [#2001] Here we present a novel technique for capturing and identifying large numbers of interstellar dust grains as well as some interplanetary dust particles in low earth orbit using a fluorescent aerogel.

Snead C. Westphal A. J. Dominguez G. Zolensky M. E. Successful Capture, Extraction and Identification of Hypervelocity CM2 Meteorite Fragments Shot by Light-Gas Gun [#1827] Here we report the successful capture, extraction and identification of two fragments of a CM2 meteorite (ALH83100) into low-density aerogel.

Education and Public Outreach

Gakin R. Lewis K. Simmons J. Gchachu K. Karner J. M. Newsom H. E. Jones R. H. Development ofa Digital Meteorite Identification Program at University of New Mexico ( UNM) (Institute of Meteoritics) and Southwestern Indian Polytechnic Institute (SIP/) [#1443] Determining the origin and chemical composition of suspect meteorite samples via the Scanning Electron Microprobe.

Lindstrom M. M. Tobola K. W. Stocco K. Henry M. Allen J. S. Space Rocks Tell Their Secrets: Space Science Applications of Physics and Chemistry for High School and College Classes [#1404] The question "How do we know these meteorites are from Mars?"sets the stage for a three-lesson instructional package. Expanding on the short answer "It's the chemistry", students are introduced to research that reveals the rocks' true identities.

122 ______.34th LPSC Program Caldwell A. Foos M. Connecting Students to Meteorite Recovery and Research [#1006] Through the use of technology and innovative activities, students at all levels have the opportunity to participate in authentic meteorite research.

Berczi Sz. Szakmany Gy. J6zsa S. Kubovics I. Puskas Z. Unger Z. How We Used NASA Lunar Set in Planetary and Material Science Studies: Comparison of Breccias from Moon, Earth, Asteroids and Ancient Ceramics by Textures and Processes [#1115] Various types of brecciation were studied on NASA Lunar Set, NIPR Antarctic meteorite set, chondritic meteorites from Hungary, terrestrial rock samples and ceramic industrial samples; their processing steps were compared in our course.

Klug S. L. Christensen P.R. Watt K. Valderrama P. WattS. Encouraging Student Interest in Science, Math, and Technology Using an Authentic Research Model: First Year Results from the Mars Student Imaging Project [#2085] Mars Student Imaging Project First Year Results: The first year of the Mars Student Imaging Project has been extremely encouraging with a wide range of student grade levels participating and representing a wide geographic distribution of teams.

Beiersdorfer R. E. Valderrama P. Singler C. R. Teaching General Education College Science Via the Mars Student Imaging Project [#1498] Asking and answering scientific questions using recent data acquired from the THEMIS instrument aboard the Mars Odyssey spacecraft is a great way to motivate college students enrolled in a required General Education science laboratory class.

Keller J. W. Roark J. H. Sakimoto S. E. H. Stockman S. Frey H. V. 3-Dimensional Topographic Models for the Classroom [#1973] We are developing a suite of solid plastic 3-D topographic models and classroom materials which will be made available to students to aid exploration of topography and its fundamental importance to understanding planetary structure and evolution.

Livingston A. Lewis K. Simmons J. Chavez D. Gchachu K. Newsom H. E. Sutherland V. Gordon H. Hare T. M. Examining Topography of Mars Impact Basins to Determine If Impact Basins Have Topographic Characteristics of a Crater [#1921] Testing the impact origins of large Mars basins using GIS technology and topographic analysis.

Kadel S.D. Greeley R. Figueredo P. H. A Tale of Two Deserts: The Southwestern U.S. and Mars in the Classroom [#1020] A Tale of Two Deserts is a set of interactive computer-based exercises that introduces educators and their students to water-formed features in desert environments on Earth and potentially similar landforms on Mars using images and physical modeling.

Fuchs M. P. Green T. J. Levant J. M. S. Nunez J. I. Bowman C. D. Sherman D. M. Students Work Alongside Scientists to Test Mars Rover [#1334] NASA's Mars Exploration Rover Mission will provide an exciting opportunity to directly engage high school students in scientific discovery on Mars by incorporating them into the mission's science team through the Athena Student Interns Program.

34th LPSC Program ______123 Campi R. A Sharpton V. L. The Global Impact Studies Project: A Web-based Resource for Researchers and Educators Interested in Terrestrial Cratering [#2017] The Global Impact Studies Project attempts to consolidate research on terrestrial impact cratering and make resources available to the public and researchers via the internet.

Lowes L. Lindstrom M. Stockman S. Scalice D. Klug S. Reuniting the Solar System: Integrated Education and Public Outreach Projects for Solar System Exploration Missions and Programs [#1991] The Solar System Exploration Education Forum has worked to foster E/PO cooperation among missions and programs to leverage resources and better meet the needs of educators and the public. These efforts are coming together in 2004.

Urquhart M. L. Space Science in the Early Elementary Classroom: A New Twist on the Classic Scale Model Solar System Activity [#1658] The K-2 Scale Model Solar System is based upon similar activities for older students, but with important differences: age- appropriate learning goals, an engaging approach, and it is not intended to substitute for later instruction.

Fauerbach M. Lucas M.P. Mon M. J. Schonberg S. Increasing Public Outreach in Astronomy Through Digital Imaging Technology [#1073] The use of inexpensive, easy to use, portable, and readily available digital imaging technology to accommodate a large and diverse audience for astronomical events was studied in this project.

Roman M. J. Hunt T. S. Yoon J. Miller D.P. The Sooner Lunar Schooner Mission [#2126] This paper describes the results of an ongoing design project for a robotic mission to explore the long-term exposure effects ofthe lunar environment.

Hargitai H. Berczi Sz. Kereszturi A Opitz A Sik A Weidinger T. Tepliczky I. Bradak B. Outreach Activity of the Planetology Group of Eotvos University, Hungary: Experimental Programs and Experiences [#1547] We present the experiences of our activity: with details from our Atlas of Planetary Atmospheres, our biweekly radio talkshow "Radio Telescope", the multilingual Map of Venus, and the planetology training of highschool teachers of geography.

Missions and Instruments

Van Cleve J. Meadows V. S. Stansberry J. Solar System Observing with the Space Infrared Telescope Facility (SIRTF) [#1464] We discuss Solar System observations which can be done by General Observers (GOs) using the Space Infrared Telescope Facility (SIRTF). We present this poster to promote a strong set of planetary proposals for the first SIRTF GO cycle.

Chien S. Davies A G. Baker V. Castano R. Cichy B. Doggett T. Dohm J. M. Greeley R. Sherwood R. Williams K. Autonomous Sciencecraft Experiment (ASE) Test Operations in 2003 [#1458] The Autonomous Sciencecraft Experiment enables (l) spacecraft autonomous command and control; (2) autonomous science analysis; and (3) science-driven spacecraft operations. Two test deployments are scheduled in 2003.

124 ______.34th LPSC Program Clark P. E. Rilee M. L. CurtisS. A. Exploring with PAM: Prospecting ANTS Missions for Solar System Surveys [#1493] ANTS (Autonomous NanoTechnology Swarm of hundreds of picoclass autonomous spacecraft) have many applications. A version designed for surveying and the resource potential of the asteroid belt, called PAM (Prospecting ANTS Mission), is examined here.

Britt D. T. The Gulliver Mission: Sample Return from the Martian Moon Deimos [#1841] The Martian moon Deimos is essentially a repository for two kinds of samples: (1) Primitive D-type material from the outer solar system and (2) Ejecta from ancient Mars. The Gulliver Mission will collect up to 10 kg of Deimos regolith and return it to Earth.

Scheeres D. J. Asphaug E. I. Colwell J. Dissly R. Geissler P. E. McFadden L.A. Petr V. Reinert R. Yano H. Asteroid Surface Science with Pods [#1444] The Deep Interior Discovery mission will place a number of "pods" on the surface of an asteroid. These pods will characterize the surface environment on an asteroid and then be commanded to detonate a load of high explosives, excavating a crater for sub-surface observations from orbit.

Allton J. H. Bevill T. J. A Future Moon Mission: Curatorial Statistics on Regolith Fragments Applicable to Sample Collection by Raking [#1746] Compilations of lithologies of Apollo 17 rock, rake and 4-10mm fragments indicate that raking fragments from lunar regolith results in similar ratios of coherent crystalline rock vs regolith-derived components for all size fractions.

Chipera S. J. Bish D. L. Vaniman D. T. Sherrit S. Bar-Cohen Y. Sarrazin P. Blake D. F. Use of an Ultrasonic/Sonic Driller/Corer to Obtain Sample Powder for CHEMIN, a Combined XRDIXRF Instrument [#1603] An ultrasonic drill was used to produce powder for CHEMIN XRDIXRF analyses and was found to do an outstanding job on all materials tested. XRD patterns and particle size distributions are comparable with powders obtained from a laboratory mill.

Vaniman D. T. Trava-Airoldi V. J. Bish D. L. Chipera S. J. Miniature CVD-Diamond Coring Drills for Robotic Sample Collection and Analysis [#1452] Chemical vapor deposition (CVD) can be used to fabricate small diamond core drills that are relatively transparent to X-rays and to infrared radiation, allowing the drill to double as a sample holder.

Anderson R. C. Castano R. Decoste D. Mazzoni D. Dohm J. An Automated Approach for Acquiring Onboard Rover Science [#1845] On board science analysis provides an opportunity to increase mission return by selecting the data with the highest science interest for downlink.

Mitri G. Baliva A. Butera F. Mazzoni A. Pompei C. Puccini S. Dating Sedimentary Processes and Deposits on Mars with LUMACH Instrument [#1889] We are developing a instrument for in situ analysis to obtain the absolute dating of sedimentary processes and deposits on Mars using the optical stimulated luminescence technique.

Horvath A. Berczi Sz. Proposals for Mars Express and Nozomi Missions How to Determine the Layered Structure of Phobos [#1131] On Viking Orbiter images ofPhobos a complex system of grooves has been discovered. We suggest measurements by Mars Express and Nozorni in order to observe the suggested layered structure of Phobos.

34th LPSC Program ______125 Astrobiology: The New Detectives

Horvath A. Ganti T. Berczi Sz. Gesztesi A. Szathmary E. Morphological Analysis ofAnnual Recurrence of Dark Dune Spots on Southern Polar Region of Mars [#1380] The massive annual reappearance of the dark dune spots (DDSs) of Mars in spring at their original sites seems to be compatible with our MSO hypothesis about the biological origin ofDDSs.

Ganti T. Horvath A. Berczi Sz. Gesztesi A. Szathmary E. Evidence for Water by Mars Odyssey is Compatible with a Biogenic DDS-Formation Process [#1134] Mars Odyssey evidence for water in the upper layer of the Southern Polar Region of Mars, is compatible with our MSO (Mars Surface Organism) model of DDS formation, which predicted water supply from this surface and suggested present- day life on Mars.

Schieber J. Arnott H. J. Nannobacteria as a Byproduct of Organic Tissue Degradation by Bacteria [#1515] Degradation of plant and animal tissues by bacterial action and by purified enzymes produces rounded structures in the size range from 40-120 nm. Early diagenetic mineralization of such decay byproducts may be the cause for nannobacteria in the rock record.

Flood B. E. Allen C. Longazo T. Microbial Fossils Detected in Desert Varnish [#1633] Desert varnish, a mixture of clays, Mn-oxides, and Fe-oxides, is a potential terrestrial analogue to Martian hematite. A scanning electron microscopic examination of samples from Pilbara, Australia revealed evidence of microbial fossilization.

Guidry S. A. Chafetz H. S. Siliceous Shrubs in Yellowstone's Hot Springs: Implications for Exobiologicalinvestigations [#1091] Siliceous shrubs are widespread in Yellowstone's hot spring deposits, have a distinctive morphology and are good hot spring environmental indicators. Siliceous shrubs contain abundant evidence of former microbial activity, therefore they could be good microbial biomarkers.

Blackhurst R. L. Jarvis K. Verchovsky A. Grady M. M. Cryptoendolith Communities in Antarctic Dry Valley Region Sandstones: Potential Analogues of Martian Life-Forms [#1576] We are studying cryptoendolith-bearing Antarctic sandstones, to determine if the microbes alter the elemental composition of the rocks. If there is an effect, then it might be a tracer for the presence of micro-organisms in martian surface materials.

Farquhar J. Johnston D. T. Wing B. A. Habicht K. S. Canfield D. E. Airieau S. Thiemens M. H. The Effect of Biosynthetic Networks on Mass-dependent Sulfur Isotope Fractionations [#1908] Biosynthetic reaction networks can influence mass-dependent isotopic fractionations of multiple sulfur isotopes and an understanding of these relationships is necessary in order to use sulfur isotope data as supporting evidence of specific sulfur metabolisms.

Shearer C. K. Hagerty J. J. Papike J. J. Pun A. Phosphates in Banded Iron Formations (BIF). A Tool for Exploring Ancient Oceans and Life on Mars [#1339] Our focus is to understand the presence and distribution of phosphates in BIFs and to evaluate the possibility that their major and trace element characteristics reflects conditions of BIF deposition or early diagenesis.

Parnell J. Mineral Radioactivity Promotes Organic Complexity on Rocky Planets [#1119] Like cosmic irradiation, energetic particles from heavy radioelements (U, Th) can cause polymerization of organic molecules. Where U/Th are concentrated in minerals, including zircon and monazite present in the early Earth's crust, they could be templates for precipitation of organic compounds.

126 34th LPSC Program Wilkins A. D. Parnell J. Wright A. J. Artz R. R. E. Model Crystals to Test Techniques in Astrobiological Exploration of Evaporites on Mars [#1675] Model evaporite crystals grown in the laboratory to incorporate organic compounds and/or biomolecules have significant potential to test the various techniques proposed for the astrobiological exploration of Mars.

Gerasimov M. V. Safonova E. N. Paskonova E. A. Synthesis of Complex Organic Molecules During an Impact [#1580] Complex organic molecules are efficiently synthesized even at oxidizing conditions during an impact related vaporization of silicates. The possible mechanism can be the Fischer-Tropsch-type of synthesis on the surface of condensing glass nano-particles.

Sekine Y. Sugita S. Kadono T. Matsui T. Global Methane Production by Iron Meteorites Impacts on Early Earth [#1302] We suggest an importance of impact-induced methane formation due to Fischer-Tropsch catalysis over the reentering iron 12 13 condensates in early Earth's atmosphere. In our estimate, the amount of methane may reach to the order of -10 - kg.

Basiuk V. A. Albarran G. Basiuk E. V. Saniger J. M. Survivability of Fullerenes Under y-Irradiation in the Interstellar Medium [#1084] We tried to roughly estimate the capability of 60C to withstand prolonged gamma-irradiation. We exposed 6°C to very high irradiation doses exceeding 6 MGy, and analyzed the irradiated samples by high-performance liquid chromatography and infrared spectroscopy.

Fuller M. Huang Y. Molecular Isotopic Characterization of the AU! 850I 3.50 Meteorite: Defining the Extraterrestrial Organic Compounds [#1237] This work demonstrates the utility of compound-specific isotope analysis in determining the extraterrestrial meteoritic organic compounds from terrestrial contaminants.

Chambers J. E. The Formation of Life-sustaining Planets in Extrasolar Systems [#2000] A life-sustaining planets lies in its star's habitable zone and contains a significant mass of water and other volatile material. I examine the likelihood that habitable planets in extrasolar systems will accrete significant amounts of volatile-rich material.

Solomatov V. S. Toward Understanding the Conditions Required for Plate Tectonics to Occur on Earth-like Planets [#1406] Life may not evolve to higher forms without plate tectonics. Analysis of the conditions required for plate tectonics to occur on a planet points out to a nearly lithostatic pore pressure in the lithosphere and large amounts of water.

Beegle L. W. Terrell C. A. Kim H. Kanik I. High-Resolution Electrospray Ionization/Ion Mobility Spectrometer for Detection ofAbiotic Amino Acids [#1295] We have determined the reduced mobility constants for 11 abiotic amino acids which are found in meteorites. We compared the values of these abiotic amino acids with ones commonly found in terrestrial biology, to determine the benefits of utilizing ESIIIMS as part of an in situ mission to Mars.

Wang A. Haskin L. A. Gillis J. J. Survey for Life-related Species During a Planetary Surface Exploration; System Type I- UV Stimulated Fluorescent Sensor [#1753] Fluorescent features of the materials of different origins were studied using the breadboard of an UV stimulated Fluorescent imager. It suggests the presence of biogenic materials in Mars regolith can be determined in a rapid survey mode.

34th LPSC Program ______127 Delin K. A. Harvey R. P. Chabot N. A. JacksonS. P. Adams M. Johnson D. W. Britton J. T. Sensor Web in Antarctica: Developing an Intelligent, Autonomous Platform for Locating Biological Flourishes in Cryogenic Environments [#1929] In cryogenic settings, biological activity is often limited to brief flourishes. We have tested an intelligent, distributed and autonomous Sensor Web in Antarctica that can monitor microclimate and adjust itself to be "in the right place at the right time".

Stoker C. R. Lemke L. G. Mandell H. McKay D. George J. Gomez-Elvira J. Amils R. Stevens T. Miller D. Mars Analog Research and Technology Experiment (MARTE): A Simulated Mars Drilling Mission to Search for Subsurface Life at the Rio Tinto, Spain [#1076] MARTE is a Mars analog drilling experiment to search for subsurface life on Mars while also characterizing a sulfide-based subsurface biosphere. MARTE is among the first set of field experiments supported by the ASTEP program.

Waite J. H. Dissly R. W. Sacks R. Block B. A GCMS Instrument for the In-Situ Detection of Organics on Mars [#2111] This paper describes an instrument that is designed to measure potential organics on Mars, using a pyrolysis/extraction system coupled to a GCMS.

Glamoclija M. Mitri G. Europa: Chaos Terrains Formation and Its Exobiological Potential [#1894] We have started to develope an exobiological model based on the thermal evolution of the icy crust. We selected that the minimum requiments for starting methanogenesis, one ofthe most favourable process for having life in this harsh environment.

128 ______...34th LPSC Program Friday, March 21, 2003 ASTROBIOLOGY: THE NEW DETECTIVES 8:30 a.m. Salon A

Chairs: C. C. Allen J. F. Lindsay

De Gregorio B. T. * Sharp T. G. Determining the Biogenicity of Microfossils in the Apex Chert, Western Australia, Using Transmission Electron Microscopy [#1267] Research using high resolution imaging, EDS, and EELS shows that the carbon in the Apex Chert is amorphous kerogen, not graphite. However, evidence of hydrothermal activity is also found, which complicates the issue of biogenicity.

Lindsay J. F.* Brasier M.D. McLoughlin N. Green O. R. Fogel M. McNamara K. M. Steele A. Mertz man S. A. Abiotic Earth- Establishing a Baseline for Earliest Life, Data from the Archean of Western Australia [#1137] In a re-evaulation of stromatolitic structure from the Warrawoona Group we conclude that they are abiotic and were deposited by precipitation from hydrothermal solutions. Oxygenic photosynthesis may not have become important on Earth until Late Archean.

Skrzypczak A. Binet L. * Gourier D. Derenne S. Robert F. On the Controversial Biogenicity of the Organic Matter in the Oldest Archean Cherts: Can Electron Paramagnetic Resonance Provide Clues? [#1677] Organic radicals in the Warrawoona chert were analyzed by EPR, and compared to those in biogenic organic matter (OM) in two younger cherts. Similar behaviors of the radicals upon heating indicate similar ageing mechanisms for the OMs in these cherts.

Parnell J. * Osinski G. R. Lee P. Pearson M. J. Feely M. Hydrocarbons in the Haughton Impact Structure, Devon Island, Nunavut, Canada [#1118] Hydrocarbons are recorded in the Haughton impact structure, as fluid inclusions in hydrothermal mineral veins. They were probably remobilized from host dolomites during impact-related hydrothermal activity.

Golden D. C. Ming D. W. * Morris R. V. Brearley A. J. Lauer H. V. Jr. Treiman A. Zolensky M. E. Schwandt C. S. Lofgren G. E. McKay G. A. Morphological Evidence for an Exclusively Inorganic Origin for Magnetite in Martian Meteorite ALH84001 [#1970] We show that the morphology of purported biogenic magnetite associated with carbonate globules in Martian meteorite ALH84001 can be reproduced exclusively by inorganic processes.

Buseck P.R. * Weyland M. Midgley P. A. Dunin-Borkowski R. E. Frankel R. B. Are Current TEM Techniques Adequate to Resolve the ALH84001 Life-on-Mars Controversy? [#2044] Improved TEM measurements are required to permit reliable conclusions to be drawn about the detailed shapes of nanocrystals that have complex morphologies like the reportedly biogenic magnetite crystals in ALH64001.

Thomas-Keprta K. L. * Clemett S. J. Shimmin J. Morphew M. Mcintosh J. R. Bazylinski D. A. Kirschvink J. L. Wentworth S. J. McKay D. S. Vali H. Gibson E. K. Jr. Romanek C. S. Three-Dimensional Morphological Analysis ofALH84001 Magnetite Using Electron Tomography [#1669] Within experimental and numerical uncertainties the tomographic reconstruction by electron tomography reveals that some ALH84001 magnetite crystals are identical to those produced by terrestrial magnetotactic bacteria strain MV-1.

Allen C. C.* Westall F. Longazo T. Scheible R. Probst L. Flood B. Mars Hematite Site: Potential for Preservation of Microfossils [#1005] The Martian hematite site may be significant in the search for evidence of extraterrestiallife. Since hematite can form as an aqueous precipitate, the potential exists for preserving microfossils in ecosystems that deposit iron oxides.

34th LPSC Program ______129 Schmidgall E. R. * Moskowitz B. M. Dahlberg E. D. Kuhlman K. R. Magnetic Analysis Techniques Applied to Desert Varnish [#2016] A vibrating sample magnetometer (VSM) and radio frequency superconducting quantum interference device (RF SQUID) have been used to measure the properties of magnetic carriers in samples of black and red rock varnish from the Mojave Desert.

Martfnez-Alonso S. * Kindel B. C. Mellon M. T. Jakosky B. M. Spectral Variance Derived from MGS-TES Data as a Tool to Detect Hydrothermal Systems [#1805] Life on Earth may have originated in hydrothermal areas characterized by a wide variety of mineral species, and consequently by a large spectral variance. We describe a methodology to identify areas of high spectral variance on Mars, using TES data.

Cabrol N. A.* Grin E. A. McKay C. P. Friedmann I. Chong Diaz G. Demergasso C. Kisse K. Grigorszky I. Ocampo Friedmann R. Murbach M.S. Hock A. Fike D. A Tambley C. Escudero L. deVore E. Grigsby B. H. First Results of the Expedition to the Highest Lake on Earth: Studying a Martian Paleolake in Bolivia and the Survival Strategies Developed by Living Organisms [#1140] We present the first results of the investigation of the biology and environment for life in the highest lake on Earth. The low oxygen, low atmospheric pressure, high-UV radiation, and average temperature make the site a close analog to Martian paleolakes. Life is thriving.

Maule J. * Steele A. Toporski J. McKay D. S. A New Antibody for Category 1 Biomarker Detection [#2131] Antibodies provide a new, sensitive and lightweight method to detect organics and life biomarkers during spaceflight. We have developed antibodies to a category 1 biomarker and have tested our assay successfully in martian gravity.

Tsapin A. * Kanik I. Beegle L. W. Wu L. Cooks R. G. Determining DIL Ratios of Amino Acids Found in Ice Above Lake Vostok Using ESI/CIT Mass Spectroscopy [#1294] The level of amino acid racemization, specifically of aspartic acid, in samples of ice from borehole drilled above lake Vostok, Antarctica obtained utilizing an electrospray ionization/cylindrical ion trap mass spectrometer will be discussed.

Pierazzo E. * Chyba C. F. Impact Delivery of Organics to Mars: Oblique Impacts [#1645] Three-dimensional hydrocode simulations are carried out to investigate the effect of impact angle on the survival and delivery of organics, in particular amino acids, to Mars by cometary impacts.

130 ______.34th LPSC Program Friday, March 21, 2003 MARS GEOLOGY AND ANALOG STUDIES 8:30a.m. Salon B

Chairs: K. S. Edgett J.M.Moore

Haldemann A. F. C.* Golombek M.P. Mars Pathfinder Near-Field Rock Distribution Re-Evaluation [#2029] We have completed analysis of a new near-field rock count at the Mars Pathfinder landing site and determined that the previously published rock count is incorrect. We detail the new rock database and the new statistics.

Edgett K. S. * Malin M. C. The Layered Upper Crust of Mars: An Update on MGS MOC Observations After Two Mars Years in the Mapping Orbit [#1124] MOC images reveal a third north polar layered unit; evidence that Athabasca Valles source is buried; large craters are interbedded with layered rock in Sinus Meridiani; and Valles Marineris interior layers are exposed from beneath the adjacent plains.

Soderblom L. A. * Kirk R. L. Meter-scale 3-D Models of the Martian Surface from Combining MOC and MOIA Data [#1730] High-resolution (1-10-m horizontal, 0.1-1-m vertical) digital elevation models are derived by using MGS MOLA topographic models to control photoclinometric inversion of MGS MOC Narrow Angle images, accounting for scattering, transmission, surface photometry, and albedo variation.

Crown D. A.* McElfresh S. B. Z. Pierce T. L. Mest S.C. Geomorphology of Debris Aprons in the Eastern He/las Region of Mars [#1126] Viking, MGS, and Odyssey datasets are used to characterize the morphology, morphometry, and distribution of debris aprons in the eastern Hellas region of Mars in order to provide constraints for models of apron formation and styles of highland degradation.

Irwin R. P. III* Watters T. R. Howard A. D. Maxwell T. A. Craddock R. A. Dichotomy Boundary at Aeolis Mensae, Mars: Fretted Terrain Developed in a Sedimentary Deposit [#1824] Fretted terrain in Aeolis Mensae, Mars, developed in a sedimentary deposit. A thick, massive unit with a capping layer or duricrust overlies a more durable layered sequence. Wind, collapse, and minor fluvial activity contributed to degradation.

Moore J. M. * Howard A. D. Ariadnes-Gorgonum Knob Fields of North-Western Terra Sirenum, Mars [#1402] We propose two alternative mechanisms for knob field erosion. Knobs have been eroded by wind abrasion, or the bulk of knob erosion was caused by dissolution weathering. Knob-materials may have formed under a strong gravity-control, such as a fluid.

Mustard J. F.* Kreslavsky M.A. Head J. W. III Milliken R. E. Correlating Meter-Scale Morphology and Kilometer-Scale Topography: Evidence for a Degraded Mid-Latitude Surface Layer on Mars [#1289] Evidence for a meters-thick, latitude-dependent surface layer, possibly ice-rich has been collected from a MOC image data base and statistical analysis of MOLA data. Here we directly compare these approaches and show a high degree of correspondence.

34th LPSC Program ______131 Bish D. L. * Carey J. W. Fialips C.-I. Water-bearing Minerals on Mars: Source of Observed Mid-Latitude Water? [#1786] Data for H20 in chabazite (Ca2A14Si80 24 ·12H20) demonstrate that its equilibrium hydration state under martian conditions is such that its high-T H20 site is essentially full, whereas the low-T H20 site may hydrate and dehydrate on a daily scale. ten Kate I. L. * Ruiterkamp R. Botta O. Lehmann B. Gomez Hernandez C. Boudin N. Foing B. H. Ehrenfreund P. Simulations of Martian Surface and Subsurface Processes [#1313] Laboratory investigations on organic chemical processes occurring in the martian surface and subsurface using a Mars Simulation Chamber.

Thomson B. J. * Schultz P. H. Analogs of Martian Surface Components: Distinguishing Impact Glass from Volcanic Glass [#1416] Quantitative analysis of the surface texture of vesicular glasses may allow for discrimination between impact and volcanic glasses. This will be an important task for future Mars sample return missions.

Quinn R. C. Grunthaner F. J. * Taylor C. L. Zent A P. Mars Redox Chemistry: Atacama Desert Soils as a Terrestrial Analog [#1951] Eh-pH diagrams for soils collected along a north-south transect in the Atacama Desert will be presented. The major redox couples in these systems will be discussed in relation to the reactive soil chemistry seen in the Viking Biology Experiments.

Tosca N.J.* McLennan S. M. Lindsley D. H. Schoonen M.A. A Acid-Sulfate Weathering of Synthetic Martian Basalt: The Acid Fog Model Revisited [#1325] The acid fog model, proposed to explain the present nature of the Martian soil, is experimentally revisited using more relevant basaltic analogs synthesized in the laboratory.

Gibson E. K. * McKay D. S. Wentworth S. J. Socki R. A. Zeolite Formation and Weathering Processes Within the Martian Regolith: An Antarctic Analog [#1244] Weathering processes operating in Antarctica's Dry Valleys produce an abundance of alteration products, including zeolites. Zeolites must be considered a candidate for storage of significant quantities of subsurface waters or other fluids on Mars.

132 ______~34th LPSC Program Friday, March 21,2003 FUTURE MARS AND ASTEROID MISSIONS, DATA, AND LANDING SITES 8:30 a.m. Salon C

Chairs: B. C. Clark M. W. Schaefer

Clark B. C.* Sterilized Sample Return: Breaking Through the Mars Science Barriers [#1797] Without return of samples from Mars, the progress in understanding this enigmatic planet may be stymied. Innovative approaches, such as in-space sterilization and/or missions such as SCIM and Gulliver, allow affordable and timely sample return.

Wang A* Kuebler K. E. Jolliff B. L. Haskin L. A Fe-Ti-Cr-Oxides in Martian Meteorite EETA79001 Studied by Point-Counting Procedure Using Raman Spectroscopy [#1742] Although Fe-Ti-Cr-Oxides are weak Raman scatters, their identification, proportions and chemical features in a Martian meteorite are revealed by a Raman point-counting procedure, as a simulation for in situ mineral characterization.

Salle B.* Vors E. Lacour J. L. Rivoallan A Fichet P. Fabre C. Dubessy J. Maurice S. Wiens R. C. Cremers D. A Laser Induced Breakdown Spectroscopy on Mars: Elemental Composition Study at Different Distances [#1578] MALIS (Mars Elemental Analysis by Laser Induced Breakdown Spectroscopy): elemental composition study at stand-off distances up to several meters.

Bell J. F. III* Squyres S. W. Herkenhoff K. E. Maki J. N. Schwochert M. Dingizian A Brown D. Morris R. V. Arneson H. M. Johnson M. J. Joseph J. Sohl-Dickstein J. N. Athena Science Team The Panoramic Camera (Pancam) Investigation on the NASA 2003 Mars Exploration Rover Mission [#1980] The Panoramic Camera System (Pancam) is a stereo, multispectral CCD camera system that is part of the Athena science payload to be launched to Mars in 2003 on NASA's twin Mars Exploration Rover (MER) missions.

Griffiths A D. * Coates A J. Josset J.-L. Paar G. Sims M. R. The Scientific Objectives of the Beagle 2 Stereo Camera System [#1609] The Stereo Camera System provides the primary imaging capability of the Beagle 2 lander. Sensati ve to visible and near IR wavebands (440-1000 nrn) it is composed of twin camera/filter wheel units. The science goals and basic design are described.

Helbert J. * Benkhoff J. Thermal Modeling of the Near Surface Layer at the Beagle 2 Landing Site in the Isidis Planitia Region [#1819] A study of the thermal properties of the surface at the Beagle 2 landing site in the Isidis Planitia basin, using the newly developed Mars Surface Layer Thermal Model (MaSLaTMo ). Some implications for the burial depth of possible subsurface ice are discussed.

Ng T. C. * Yung K. L. Yu C. H. Chan C. C. First Planetary Rock Coring in Our Solar System ESA 2003 Beagle 2 Mars Mission [#1002] In 2003, ESA will send a lander to Mars for exobiological exploration. There are three kinds of sampling techniques as follows: (1) rock coring, (2) mole subsoil sampling, (3) scooping.

Schaefer M. W. * Dyar M.D. Benison K. C. Moss bauer Spectroscopy of Mars-Analog Rocks from an Acid Saline Sedimentary Environment [#1690] Terrestrial acid saline lakes are suggested as Mars analog environments. Such conditions could result from a sulfur-rich lithosphere corning into contact with shallow, evaporating bodies of water. Mossbauer spectroscopy is used to characterize samples from an Australian acid saline lake.

34th LPSC Program ______133 Werner S.C.* van Gasselt S. Neukum G. The Erosional History ofAthabasca Valles, Mars [#1996] The Athabasca Valles, Mars, has undergone geological active cycles at least over the last billion years, which were dominated by volcanic processes in the end.

Leshin L.A.* Clark B. C. Forney L. Jones S.M. Jurewicz A. J. G. Greeley R. McSween H. Y. Jr. Richardson M. Sharp T. Thiemens M. Wadhwa M. Wiens R. C. Yen A. Zolensky M. Scientific Benefit of a Mars Dust Sample Capture and Earth Return with SCIM [#1288] The Sample Collection for Investigation of Mars (SCIM) mission proposes to return martian dust to Earth for mineralogical, chemical, isotopic, and other studies. Here we discuss science gained from analyzing such a sample in terrestrial laboratories.

Asphaug E.* Colwell J. Dissly R. Kanizay K. Petr V. Scheeres D. J. Meteoroid Bombardment and Blast Experiments on Asteroids [#1537] Cohesion and other soil-mechanical characteristics may dominate over gravity or traditional strength effects in the formation of craters on asteroids. We propose asteroid surface blast experiments to be imaged at high frame rate from rendezvous orbit.

Sears D. W. G. * Scheeres D. J. Binzel R. P. The HERA Multiple Near-Earth Asteroid Sample Return Mission: Selection of the Target Asteroids [#1047] The HERA mission aims to return samples from three asteroids. Here, we discuss the criteria used to select the asteroid targets, and the criteria to be used to select target areas on the asteroids.

134 ______~34th LPSC Program Friday, March 21, 2003 CAis: REFRACTORY DIRECT TO YOU 8:30 a.m. Marina Plaza Ballroom

Chairs: J. N. Cozzi G. J. MacPherson

Cuzzi J. N. * Davis S. S. Dobrovolskis A. R. Creation and Distribution ofCAis in the Protoplanetary Nebula [#1749] Outward diffusion in a turbulent nebula allows CAis to survive gas drag for 1-3 Myr. Rapid drift of silicate/carbon rich boulders into the CAl formation zone may provide a reduced environment and mass-independent fractionation of 0-isotopes.

Hiyagon H.* Hashimoto A. Kimura M. Ushikubo T. First Discovery of an Ultra-Refractory Nodule in an Allende Fine-grained Inclusion [#1552] We discovered an ultra-refractory nodule in a fine-grained inclusion in Allende. It shows high contents of Sc, Y, Zr, some refractory metal grains and a highly-emiched HREE pattern.

Harazono K. * Yurimoto H. Oxygen Isotopic Variations in a Fluffy Type A CAl from the Vigarano Meteorite [#1540] We report coexistence of 160-rich and 160-poor melilite in a fluffy Type A CAl from the Vigarano meteorite. The discovery indicates that multiple heating processes in the solar nebula are required to form fluffy Type A CAls.

Mendybaev R. A. * Richter F. M. Davis A. M. Formation of the Melilite Mantle of the Type Bl CAls: Experimental Simulations [#2062] Synthetic CAis with melilite mantles (like natural Type B1 CAis) have been made by isothermal crystallization and also by slow cooling in a reducing gas.

SimonS. B. * Grossman L. Insights into the Formation ofType B2 Refractory Inclusions [#1796] Type B2 inclusions tend to have relatively SiOrrich compositions compared to those ofB1s and inferences about the formation of Type B CAis that are based on studies of Type B 1 compositions should not be routinely extended to Type B2s.

Janney P. E. * Davis A.M. Wadhwa M. Mendybaev R. A. Richter F. M. High Precision Magnesium Isotopic Measurements of CAl Evaporation Residues [#1940] High precision magnesium isotopic analyses by ICPMS confirm that laboratory evaporation of magnesium from a CAl melt follows the Rayleigh law.

MillerS. A. * Burnett D. S. Asimow P. D. Experimental Divalent Element Partitioning Between Anorthite and CAl Melt [#1446] We demonstrate that anorthite can be crystallized from a wide range of melt compositions, which can isolate the effects of melt composition and crystal chemistry on partitioning. Experiments to date show that liquid composition is significant.

MacPherson G. J. * Russ G. R. Al-rich Chondrules: Petrologic Basis for Their Diversity, and Relation to Type C CAis [#1825] The bulk compositions of Al-rich chondrules straddle both the olivine-plagioclase cotectic and a thermal divide on that cotectic, explaining much of the observed petrographic diversity. Type C CAis differ because they never crystallize olivine.

34thLPSCProgram ______135 Ash R. D.* McDonough F. W. Rumble D. III Rare Earth Elements and Oxygen Isotopes in Allende Chondrules as Evidence for CAl Mixing in Chondrule Precursors [#1907] REE and 0 isotopes in an Allende Al-rich CAl indicates the presence of CAl material in the precursor. Live 26 AI may have been inherited from the same source, with implications for chronology.

Lyons J. R. * Young E. D. Towards an Evaluation of Self-Shielding at the X-Point as the Source of the Oxygen Isotope Anomaly in CA/s [#1981] Self-shielding in a 2000 K, 10 mbar solar nebula is shown to yield a maximum, mass-independent fractionation in H20 of +350%o. However, atomic C rapidly reacts with H2 and H20 to reform CO, preventing transfer to silicates.

Chaussidon M. * Robert F. Russel S. S. Gounelle M. Ash R. D. Variations ofApparent 10Be!Be Ratios in Leoville MRS-06 Type Bl CAl: Constraints on the Origin of10Be and 26Al [#1347] Leo ville MRS06 type B 1 CAl shows perturbations of its 10Be/B and 26Al/Mg systems. The variations of the 10Be/9Be and 7LifLi ratios from core to rim of the CAl may indicate that the already-formed CAl was irradiated around the T-Tauri Sun.

Desch S. J. * Srinivasan G. Connolly H. C. Jr. An Interstellar Origin for the Beryllium 10 in CA/s [#1394] We have calculated the rate at which GCRs produce 10Be by spallation, and the rate at which 10Be GCRs are trapped, in the solar nebula. To within the uncertainties, the 10Be/Be ratio in CAis is explained, obviating the need for the "X-wind" model.

Paque J. M. * Burnett D. S. Chaussidon M. USNM 3515: An Allende CAl with Li Isotopic Variations [#1401] Detailed petrographic study of the Type B 1 CAl USNM 3515 neither confirms nor refutes the interpretation that the Li isotopic variations are due to 7Be (Chaussidon eta!., 2002). The Li isotopic variability could reflect addition ofLi during alteration, followed by shock and/or pulse heating.

l36 ______-'34th LPSC Program PRINT-ONLY PRESENTATIONS

Moon

Byrne C. J. Proposed High-Level Regional Focal Points for Lunar Geography [#1517] A list of 11 focal points, based on interesting features and approximately uniformly distributed around the moon is proposed. The objective of establishing these focal points is to organize photos and other images with minimal distortion and maximal mnemonic value.

CudnikB. M. Multi- Wavelength Observations of the Mercury Transit of November 1999 [#1240] This work discusses optical effects in several wavelengths, both ground-based and space-based, of the Mercury transit across the edge of the Sun's disk. The famous "Black Drop effect" as well as its little-known component, termed the "Gray Drop effect" by the author, is described.

Dunkin S. K. Heather D. J. Crawford I. A. Mapping of Lava Flows in Oceanus Procellarum Using Clementine Multispectral Data: A Progress Report [#1672] An outline on continuing work to map the spectrally distinct lava flows across the whole of Oceanus Procellarum using Clementine data.

Rolin I. V. Limiting Accuracy of Mars, Mercury, Venus Instantaneous Spin Components Estimation by Ground-based Radar [#1109] A new Earth-based radar speckle displacement interferometry (RSDI) technique is discussed to measure instantaneous spin components of Mercury, Venus, and Mars with an unprecedented accuracy of -1 arcsec.

Ivliev A. I. Kashkarov L. L. Kalinina G. V. Track-Thermoluminescence Analysis of the Luna-24 Silicate Grains: The Degree of Shock-Thermal Reworking [#1024] The data presented here are the result of track-thermoluminescence measuring of the Luna-24 silicate crystals which to be used for determining of radiation and shock-thermal parameters of the lunar mater.

Jackson N. W. Isopach Mapping of Lunar Basalts in the Northern Oceanus Procellarum Region, Using Clementine Data [#1086] To understand the underlying morphology of northern Oceanus Procellarum using Clementine data. Isopach maps of northern OP have been constructed and Cross sections have been derived.

Kazantseva L. V. Kyiv Database of Lunar Occultations and Some Preliminary Results [#1095] Presented here is the Kyiv database of observations of lunar occultations obtained over 38 years, along with some preliminary analyses.

NobleS. K. Keller L. P. Pieters C. M. Making a Regolith Breccia [#1626] A significant percentage of grains in lunar regolith breccias are coated with melt glass rims. The existence of these glass rims can give us insight into the impact and breccia forming process.

Schmitt H. H. Ancient Zircons Suggest Melt from Very Large Terrestrial Impacts Produced First Continents [#1177] South Pole-Aitken basin and strong evidence of other extremely large, very old basins on the Moon and Mars indicates that such basins formed on Earth. Thick sheets of aqueous impact melt in such terrestrial basins may have differentiated to produce recently discovered ancient zircons.

34th LPSC Program ______137 Ustinova G. K. Effects of the Ion Charge States in Lunar Ilmenites [#1216] The noble gases in the lunar ilmenites are analyzed with respect to the charge states of their ions in the solar wind and with respect to the shock wave acceleration of the solar energetic particles.

Wilson T. L. Andersen V. Pinsky L. S. Lunar Regolith Albedos Using Monte Carlos [#1392] We report on the preliminary results of our Monte Carlo investigation into the CR-induced albedo of the lunar surface using FLUKA, which includes the effects of charm. The successful simulation of prompt neutrino production by charmed meson decay on the Moon is presented here for the first time.

Yakovlev O. I. Ivanov L.l. Kolotov V. P. Dogadkin N. N. Karandashev V. K. Kazilin E. E. Popov V. S. Study of Evaporation of Microelements from Anorthosite and ICP-MS Analyses of the Condensate Products [#1044] We studied experimental evaporation on anorthosite sample using ICP-MS analyses of vapor-condensate phase. Vapor-residual melt distribution data were obtained for trace elements on the Moon and possible origin of alkali anorthosite was considered.

Yakshinskiy B. V. Madey T. E. Electron- and Photon-stimulated Desorption ofAlkali Atoms from Lunar Sample and a Model Mineral Surface [#2106] The laboratory study of electron- and photon-stimulated desorption of alkali atoms from model surface and lunar basalt sample is presented. The desorption by UV solar irradiation is shown to be a dominant source process for alkalis in the tenuous lunar atmosphere.

Origins of Planetary Systems

Canup R. M. Asphaug E. On an Impact Origin of Pluto-Charon [#1984] We report results of simulations of potential Pluto-Charon forming impacts using smoothed-particle hydrodynamics and a variety of rock-ice compositions.

Furuya I. Nakagawa Y. Daisaka H. Planetesimal Formation Through Gravitational Instability [#1577] We reproduce the gravitational fragmentation of a dust layer by 3D local N-body simulations in order to examine the process of planetesimal formation and the mass of a planetesimal.

Grubert J.P. Pulse of the Solar System [#1168] The gravitational frequency or pulse of the solar system is calculated and found to vary from about 1.5 Hz to 1.8 Hz. Also, the planets of the solar system all occupy stable orbits imposed on them by the frequencies emitted by the Sun and Jupiter.

Lindsay B. D. Orr K. W. Hyde T. W. Barge L. B. Gravitational Interactions Between Protoplanets and Planetesimal Disks of Equal Mass [#1204] Numerical simulations show that planetesimal systems with unevenly distributed masses may actually be more stable than those where all the bodies are of roughly equal size.

Moriwaki K. Nakagawa Y. A Planetesimal Accretion Zone in a Circumbinary Disk [#1275] From the viewpoint of celestial mechanics, we examined a zone where planetesimals can accrete to form a P-type planet, which orbit outside both of the binary stars. We derived the inner boundary of planetesimal accretion zone.

138 ______.34th LPSC Program Val'tts I. E. Lyubchenko S. Yu. The Mass of Double Protostar with Protoplanetary Systems in Norma [#1030] A new way to obtain the velocity of a protostar and to calculate its mass is presented. The analysis has been carried out for a double protostar in the Norma constellation which is accompanied by two protoplanetary systems emitting in methanol.

Vityazev A. V. Pechernikova G. V. Bashkirov A. G. Accretion and Differentiation ofTerrestrial Protoplanetary Bodies and Hf-W Chronometry [#1656] During accumulation it was possible differentiation in exothermal regime with selfheating. Hf-W data are interpreted as evidence for early differentiation in large bodies tens of Ma before their final integration. Data on Nb-Zr are not in contradiction with this scenario.

WardW.R. Type II Migration and Giant Planet Survival [#1736] Type II migration where a large planet opens a gap in its evolving nebula may be the delivery mechanism of close stellar companions. However, we show by simple conservation arguments that if the disk has a finite outer edge, some planets resist migration to the star.

Meteorites

Alexeev V. A. Depth Dependence of22NePNe in Ordinary Chondrites and Ablation of Meteorites [#1003] Statistical analysis of cosmogenic neon isotopic ratios in ordinary chondrites allows us to derive some regularities for estimating ablation degree of the chondrites.

Brandstatter F. Nazarov M. A. Kurat G. Barringeritefrom the Santa Catharina Ungrouped Iron Meteorite [#1681] We report on an forbidden barringerite-metal association in the Santa Catharina iron meteorite. From our investigation we conclude that barringerite but not schreibersite can stably co-exist with metal in Ni-rich ataxites at low temperatures.

DyarM. D. Mossbauer Spectroscopy of Mineral Separates from SNC Meteorites [#1701] 3 Mossbauer spectroscopy has been used to analyze mineral separates from 10 different SNC meteorites. Fe + contents are consistent with the few previous Mossbauer studies of separates and bulk samples, and they agree with micro-XANES results within error bars.

Fisenko A. V. Verchovsky A. B. Semjonova L. F. Wright I. P. Fillinger C. T. Is Xe-HL a Real Component? [#1744] Analysis of noble gases in the grain-size fractions of Boriskino meteorite indicate that Xe-HL is a real component implanted into diamonds after mixing of isotopically anomalous and normal components.

Greshake A. Clayton R.N. Mayeda T. K. Kurz M. NWA I465 and NWA 1665: Two Unusual Carbonaceous Chondrites from Northwest Africa [#1560] NWA 1465 and NWA 1665 are two new unusual carbonaceous chondrites from Northwest Africa. NW A 1465 contains rom- sized flattened chondrules and CAis as well as centimeter-sized dark objects. NWA 1665 is similar to Dar al Gani 055 and CK chondrites.

Hohenberg C. M. Pravdivtseva O. V. Meshik A. P. I-Xe Ages and Trapped Xe Compositions [#2107] Iodine trapped at identical sites as Xe can produce trapped pseudo-components with enhanced 128Xe. To produce the results observed in dark inclusions, little 1291 must be present (dead iodine). If true, these observations have implications for the duration of aqueous alteration and phase Q.

34th LPSC Program ______139 Harz F. Cintala M. J. See T. H. Impact Melting of Ordinary Chondrite Regoliths and the Production of Fine-grained F e0 [#1680] This work investigates the possible formation of fine-grained Fe-particles on the surfaces of ordinary chondrites, parent body S-type asteroids in an effort to understand the optical properties of such bodies.

Johnson J. R. Visible/Near-Infrared Spectra of Experimentally Shocked Plagioclase Feldspars [#1491] Visible/NIR reflectance of shocked feldspars show weakening of water- and OH-related bands and non-linear reflectance changes with increasing pressure that are consistent with variations in the relative abundance of diaplectic glass.

Kashkarov L. L. Ivliev A I. Kalinina G. V. Lavrentjeva Z. A Lyul A Yu. Kuyunko N. S. Pre-Accretion and/or Regolith History of the Pesyanoe Obrite Matter [#1025] Report here data on the Pesyanoe achondrite are the result of the next step in a series of work to be used as a basis for investigation of radiation and shock-thermal characteristics in a meteorite matter by complex track, thermoluminescence, chemical and petrology methods.

Lavrentjeva Z. A Lyul A. Yu. REE and Some Other Trace Element Distributions of Mineral Constituents in Enstatite Meteorites [#1026] REE and some other trace element distributions of mineral constituents in enstatite meteorites of Adhi Kot, Pillistfer, Norton County and Pesyanoe are presented.

Miyamoto M. Ueda Y. Mikouchi T. Monkawa A. Reflectance Spectra for Olivine Heated with Sudden Oxygen-Fugacity Change [#1563] We report spectral changes for olivine heated at high temperature (up to 1300°C) with rapid oxygen-fugacity changes, and suggested that the elementary process of space weathering is related to heating with oxygen-fugacity change.

Nikitushkina O. N. Ivanov L. I. Formation of Unipolar Arcs Under Meteorite Action [#1910] One of the problems on development of advanced long terms functioning space vehicles and orbital stations is protection of constructions and individual elements against influence of meteorite flows and various particles of artificial origin, so-called space dust.

Papike J. J. Karner J. M. Shearer C. K. Determination of Planetary Basalt Parentage: A Simple Technique Using the Electron Microprobe [#1018] A simple technique to determine the planetary parentage of basaltic meteorites by comparing the Fe/Mn (atomic) of olivine and/or pyroxene vs. An% of plagioclase.

Petaev M.l. Jacobsen S. B. Measurement of PGEs, Re, Mo, Wand Au in Meteoritic Fe-Ni Metal [#1732] The Harvard LA-ICP-MS system has been used to analyze 16 iron meteorites and the Divnoe primitive achondrite for Ni, Mo, Ru, Rh, Pd, W, Re, Os, lr, Pt, and Au. The results are reported.

Sahijpal S. Soni P. Contributions of Short-lived Nuclides by Wolf-Rayet Stars and Supernovae 1 blc to the Early Solar System [#1087] Role ofWolf-Rayet stars and SNe1b/c in producing the short-lived nuclides found in early solar system is accessed by imposing isotopic constraints on the models.

Singletary S. J. Grove T. L. NWA 1586: Macrosmelting in a Monomict Ureilite [#1191] NWA 1586 is a unique new ureilite recovered in 2001 and displays the typical monornict ureilite texture. Pigeonite grains in this ureilite contain domains that consist of three pyroxenes, metal, a silica rich phase and voids. We interpret ~hese to represent a macrosmelting event.

140 ______.34th LPSC Program Stakheev Yu. I. Regularities of the "Mercury Breath" of the Earth [#1045] The Fourier analysis of 19040 hourly measurements of the mercury vapor flow "earth crust- atmosphere" were performed. Six distinct lines in power spectra were found. The frequencies of these lines coincide with frequencies of the Earth tides deformations.

Valter A. A. Plotnikova L. F. Biostratigraphic Indications of End Cretaceous Age of the Boltysh Impact Crater (Ukrainian Shield) [#1048] The complexes of foraminifera in ejecta breccia fragments and in ejecta covering sediments were determined. According to these data the time interval of crater formation is detected to be 66.8-65 Ma.

Verish R. S. Dale Dry Lake- New Classification, Revised Recovery Information [#1801] This paper reports on a recent characterization of the Dale Dry Lake meteorite. This stone is now classified by UCLA as an unequilibrated (L3.7) chondrite. This paper proposes that these revisions to the Catalogue of Meteorites be posted in the Meteoritical Bulletin.

Vogel N. Wieler R. Baur H. Bischoff A. Noble Gases in Allende Fluffy and Compact CA/s [#1873] Ne and Ar in Allende CAls are explained by cosmogenically produced Ne and Ar taking into account the CAl-chemistry and large preatmospheric size of Allende causing cosmogenic production of 36 Ar from Cl. No trapped noble gas components were detected.

Xie Z. Sharp T. G. DeCarli P. Estimating Shock Pressures from High-Pressure Minerals in Shock-induced Melt Veins of the Chondrites [#1280] High-pressure phases in shock-induced melt veins of seven L chondrites were investigated by TEM, and used to constrain crystallization pressures of melt veins based on phase diagram, then to infer shock pressures. The study indicates the shock pressures <-25 GPa for seven samples (S3-S6).

Xiong Y.-L. Hewins R. H. Evaporation Loss of Light Elements as a Function of Cooling Rate: Logarithmic Law [#1206] This paper proposes that evaporation loss of light elements as a function of cooling rate at constant peak temperature and oxygen fugacity should obey the logarithmic law.

Zinovieva N. G. Mitreikina O. B. Granovsky L. B. Systematic Compositional Variations of Silicates and Metallic Phases as Evidence of Liquid Immiscibility in Chondritic Melts [#1058] Systematic variations in the composition of silicates and metallic phases in ordinary chondrites of different petrological types as well as in the results of experimental melting of chondrites provide evidence of their magmatic genesis.

34thLPSCProgram ______141 Astrobiology

Baron M. Pentecost A. Parnell J. Hot and Cold Spring Deposits as a Source of Palaeo-Fluid Samples on Mars [#1184] Palaeofluids, rich in biomolecules, are preserved unaltered in minerals from terrestrial hot and cold spring deposits. These deposits are therefore valuable targets for astrobiological sampling on Mars.

Cabrol N. A. Grin E. A. McKay C. P. Friedmann I. Chong Diaz G. Demergasso C. Kisse K. Grigorszky I. Ocampo Friedmann R. Hock A. Fike D. A. Tambley C. Escudero L. Murbach M.S. deVore E. Grigsby B. H. The Licancabur Project: Exploring the Limits of Life in the Highest Lake on Earth as an Analog to Martian Paleolakes [#1393] Our poster presents the Licancabur project overall objectives and summarizes the results of the first expedition to the highest lake on Earth that took place in 2002. It also describes the direction and developments of this project in the coming years as a unique terrestrial analog to Mars.

Maurette M. Balanzat E. Duprat J. Cosmic Irradiation of Carbonaceous Material in Space and Prebiotic Chemistry [#1743] The evolution of carbonaceous material in sporadic and "shower" micrometeorites under cosmic irradiation (of both galactic and solar energetic particles) is examined. Implications are drawn concerning prebiotic chemistry.

Mizser A. Kereszturi A. The Astrobiology Matrix and the "Drake Matrix" in Education [#1114] We present here two matrix shaped tables for the education of astrobiology: the "Drake matrix" for the comparison of the astrobiological potential of different bodies, and the astrobiology matrix for the visualization of the interdisciplinary connections between different fields of astrobiology.

Morris P. A. Wentworth S. J. Neiman M. Byrne M. Longazo T. Galindo C. McKay D. S. Sams C. Modern Microbial Fossilization Processes as Signatures for Interpreting Ancient Terrestrial and Extraterrestrial Microbial Forms [#1909] Terrestrial biotas from microbially dominated hypersaline environments will help us understand microbial fossilization processes, thereby enabling us to identify putative microbes from extraterrestrial materials.

Wilkins A. D. Parnell J. Potential Preservation of Life Within Fluid Inclusions in Martian Impact Craters [#1697] Impact craters on Mars may have created a range of aqueous environments conducive to life. Fluid inclusions have the potential to preserve organic matter, and have significant potential for astrobiological exploration within evaporites and hydrothermal systems in craters.

Asteroidal and Cometary Dust lpatov S. I. Mather J. C. Taylor P. Migration ofAsteroidal Dust [#1501] The less are the dust asteroidal particles, the greater are their mean eccentricities and inclinations and their migration outside Jupiter's orbit, and the less is the portion of particles that collided with the Sun and the terrestrial planets.

Yada T. Nakamura T. Noguchi T. Ushikubo T. Matsumoto N. Kojima H. Takaoka N. Variations of Oxygen Isotopic Compositions of Silicate Spherules Collected from Antarctic Blue Ice [#1587] From oxygen isoto~ic composition, Antarctic silicate spherules are grouped into those close to the TF line, those close to the CCAM line and a 1 0-rich spherule that is estimated to be originally an anhydrous IDP including presolar silicates.

142 ______.34th LPSC Program Outer Planets

Moses J. I. Fouchet T. Bezard B. Lellouch E. Gladstone G. R. Photochemistry and Diffusion in Jupiter's Stratosphere [#1079] We use observational constraints from the Infrared Space Observatory to construct a one-dimensional steady-state model of Jovian stratospheric photochemistry. Implications regarding diffusion and hydrocarbon chemistry will be discussed.

Mars Odyssey

Andersen V. LeeK. Pinsky L. Atwell W. Cleghorn T. Cucinotta F. Saganti P. Turner R. Zeitlin C. Monte Carlo Simulations of the Response of the MARIE Instrument [#1714] We present the results of Monte Carlo simulations of the response of the MARIE instrument to cosmic ray protons.

Chicxulub

Kinsland G. L. Sanchez G. Kobrick M. Hurtado-Cardador M. Elements of the Chicxulub Impact Structure as Revealed in SRTM and Suiface GPS Topographic Data [#1453] Because the Chicxulub Crater has been buried by Tertiary carbonates the structures of the crater have very subdued surface expressions. We correlate ground, GPS, elevation data and Shuttle Radar Topography Mission (SRTM) data to buried features of the impact structure.

Langenhorst F. Deutsch A Bornemann U. Ivanov B. A Lounejeva E. On the Shock Behaviour of Anhydrite: Experimental Results and Natural Observations [#1638] To understand the shock behavior of anhydrite, we performed shock experiments and studied anhydrite-rich impact breccias from Chicxulub cores. Results indicate a high stability of anhydrite under shock compression. High post-shock temperatures are required to devolatilize anhydrite.

Education

Berczi Sz. Hegyi S. Kovacs Zs. Hudoba E. Horvath A Kabai S. Fabriczy A Foldi T. Space Simulators in Space Science Education in Hungary (2): Hunveyor Orientations and Astronomical Observations on Martian Suiface [#1166] We studied how Hunveyor (on Mars) and manned activities (on space station) are affected by orientation changes in coordinate transformations, especially if space station activities are at the Lagrangian points of the Earth + Sun or Earth + Moon system.

Carruba V. Carter L. M. Cuk M. Jackson M. A Jordan C. E. Krco M. Masters K. L. Pandian J.D. Rothstein D. M. Saintonge A Scharringhausen B. R Spekkens K. Springob C. M. Kornreich D. A The Curious Team "Curious About Astronomy?": Cornell University's Ask an Astronomer Website [#1893] "Curious About Astronomy? Ask an Astronomer" is a website (http://curious.astro.cornell.edu) run by graduate and undergraduate student volunteers at Cornell University. Questions from the general public are submitted by email and answered by members of the Curious Team.

Castilla G. de Pablo M. A Lopez C. Rocks and Landscapes of the Solar System: An Activity for the Teaching and Spreading of the Planetary Geology [#1070] We have designed an experience in which, employing rocks and landscapes of our geological environment, pupils are able to perform an exercise comparing planetology analyzing shapes, processes, and material for several planetary bodies of the solar system.

34th LPSC Program ______143 Dudich E. Poka T. Berczi Sz. "Geonomy" by E. Szadeczky-Kardoss: New Auxiliary Studies Update the Poineering Book in Space and Earth Science Education in Hungary [#1555] E. Szadeczky-Kardoss (1903-1984) defined the synoptic and synthesising earth science as geonomy. Our multidisciplinary subcommission of the HAS undertook a review and updating of this book for space and earth science education in Hungary.

Hegyi S. Kovacs B. Keresztesi M. Gimesi L. Halasz A. Berczi Sz. New Gas Sensing Device to the Hunveyor-2 University Lander of the Pees University, Hungary [#1181] New optical sensing device for ammonia gas was prepared for Hunveyor-2 university lander. Sensor was made by immobilizing the ammonia sensitive dye on an Al 20 3 surface (no polymer was used) making it more resistant to environmental changes.

Hudoba Gy. Sasvari G. Kerese P. Kiss Sz. Berczi Sz. Hunveyor-4 Construction at Kanda Kalman Electrical Engineering Faculty of Budapest Polytechnik, Szekesfehervar, Hungary [#1543] We report about the construction and main system characteristics of the fourth Hungarian University Surveyor at Szekesfehervar, Budapest Polytechnik, Kando Kalman Faculty of Electrical Engineering, Institute of Computer Technology, Hungary.

Lopez C. de Pablo M. A. Castilla G. From Madrid to the Sky: An Experience, Out of the Classroom, to Understand the Size of the Solar System [#1055] To understand the size and the distance between the planets and the Sun its the objective of this didactic activity that it could be developed in the streets of a city.

Martin L. Lopez C. Castilla G. de Pablo M. A. Design and Construction ofan Adjustable Shooter for the Modelization of Impact Craters in the Classroom [#1054] In this work is presented a shooter for the modelization of impact craters with students an the public to introduce them into the Planetary Sciences.

Montoya I. Nieto A. B. de Pablo M.A. Mars 3D: A Virtual Fieldtrip by the Red Planet in the Classroom [#1089] We show how to create 3D digital elevation models and anaglyphs of the surface of Mars in order to introduce the pupils and the public to the general geology of the Red Planet.

Nieto A. B. Lopez C. de Pablo M.A. Castilla G. Montoya I. The Geology of Mars Through 3D Digital Videos in the Classroom [#1053] Here is presented a didactic activity that employ informatic tool to introduce to the students into the public on the planetary geology and to the geology of Mars.

Uceda E. R. De Pablo M. A. Castilla G. Terrestrial Impact Craters: What Can We Learn About the Earth and Other Bodies of Our Solar System? Didactic Activities [#1094] Using the multidisciplinary character of the planetary sciences, secondary education students can extract information about terrestrial impact craters with the aid of some mathematical equations and simple physical concepts.

144 ______.34th LPSC Program Venus

Abdrakhimov A. M. * Petrochemical Comparision of Venus' Rocks with Terrestrial Oceanic Igneous Rocks Using the Discriminant Method [#1215] The goal of this work is to compare the analyzed Venus' rocks and terrestrial oceanic igneous rocks to search for similariries/dissimilarities in their chemistry, which is correlated with geodynamic environment.

Bond T. Topographic Mapping of Venusian Craters Using Artificial Neural Networks [#1668] The use of artificial neural networks for generating topographic maps of Venusian craters is considered for areas which do not have both cycle one and cycle three Magellan stereo data coverage.

Brian A W. Stofan E. R. Guest J. E. The Summit, Tectonic and Flank Characteristics of Large Venusian Volcanoes: A New Global Survey [#1333] We have re-examined the large volcano population on Venus to eliminate the overlap with features contained in coronae catalogues. We have devised a new classification scheme to describe the summit, tectonic and flank characteristics of each edifice.

Burba G. A Blue J. Marov M. Ya. Stofan E. R. Soltesz T. Venus Nomenclature 2002: New Names and the Website's Changed Look [#1041] Thirty-four new names of 10 generic types have been introduced for the features on the planet Venus in 2002. The list of the new names is provided. The advanced features of the renewed online Gazetteer of Planetary Nomenclature are described.

Krassilnikov AS. Head J. W. Arachnoids on Venus: Structural Analysis, Classification and Models of Formation [#1220] We have studied geology of 20% of the arachnoid population (53 structures), classified them (6 classes) on the basis of tectonic sets typical for each class and suggested models of their formation at different geodynamic conditions.

Lopez I. Hansen V. L. Geologic Mapping of the Helen Planitia Quadrangle (V52), Venus: The First Results [#1221] Preliminary geologic mapping of the Helen Planitia Quadrangle (V52), Venus is in progress. This area allows the investigation of the transition between the meso lands of Eastern Parga Chasmata and the lowlands of Helen Planitia.

Pace K. R. Krassilnikov A S. Calderas on Venus: Tectonics, Volcanism and Relationship with Regional Plains [#1309] We studied geology of 97 calderas and classified them on the basis of their tectonic structure sets. Evolution of calderas activity with time supports models of "directional" evolution of Venus geology and the lithosphere thickening.

Missions and Instruments

Asphaug E. Belton M. J. S. Cangahuala A Keith L. Klaasen K. McFaddenL. Neumann G. Ostro S. J. ReinertR. Safaeinili A Scheeres D. J. Yeomans D. K. Exploring Asteroid Interiors: The Deep Interior Mission Concept [#1906] We describe the Deep Interior mission concept to determine the geophysical properties of near-Earth objects, by obtaining the first volumetric image of the interior of an asteroid and by performing calibrated blast experiments.

Franzen M. A Sears D. W. G. The Hera Near-Earth Asteroid Sample Return Mission: An Overview [#1032] The HERA mission proposes to sample three asteroids and return samples to Earth. Here we discuss current concepts to ensure both representative sampling and sampling of unusual features on asteroids.

34th LPSC Program ______145 Mardon A. A. The Use of Robotic Excavation Techniques to Excavate Man Rated Subsurface Structures [#1098] If we launch in the near-term future a robotic excavator to the Moon, in the long term by the time man goes back to the Moon it is proposed that a substantial complex of hollowed out caverns would exist for use by later manned missions to the Moon.

Impacts

Badjukov D. D. Brandstiitter F. lvanova M. A. Korochantsev A. V. Kurat G. Lorents C. A. Nazarov M. A. Ntaflos Th. The Smerdyachee Lake: A Possible Impact Crater near Moscow, Russia [#1566] The Smerdyachee Lake structure with a diameter of 350m is very similar to fresh simple impact craters. The find of the possible impactite confirms its explosive formation. This crater must have been formed less than 10,000 years ago.

Glatz C. A. Abbott D. H. Nunes A. A. Identifying an Oceanic Impact Crater Through Sedimentology [#1197] Discussion of the use of topographical features and sedimentology to identify subaqueous impact craters.

McHone J. F. Killgore M. Verish R. S. Roddy D. J. Non-Impact Origin for Nevada's Elko Crater Field [#1572] Field examination of rimmed depressions near Elko, Nevada reveals no conclusive evidence for meteorite impact. Their limited occurrence within similar geological units along valley flanks suggests slumping and subsidence due to groundwater sapping.

Oleinik G. S. Valter A. A. Erjomenko G. K. The Structure of High Lonsdaleite Diamond Grains from the Impactites of the Belilovka (Zapadnaja) Astrobleme (Ukraine) [#1561] The high lonsdaleite impact diamond grains from the Belilovka (Zapadnaja) astrobleme consist of blocks near 0.1 mcm size which contain of diamond, lonsdaleire- graphite or pure graphite.

Ormo J. Lindstrom M. Shuvalov V. V. Crater Dimensions from Impacts at Sea [#1362] The transient cavity from a marine impact differs strongly from the land-impact often used as standard in impact mechanics. We here define the dimensions of specific parts of the marine-target impact structure, which is important for comparisons of magnitudes between different impact events.

Raitala J. Ojala K. Ohman T. Badjukov D. D. Lorenz C. A. Kara Crater by Remote Sensing [#1057] Kara crater provided an impactite discovery 55 km away from the central uplift. This suggests that the deeply eroded crater was originally over 100 km in size. This is supported by the remote sensing approach using the Landsat TM data.

Shuvalov V. V. Numerical Modeling of the Eltanin Impact [#1101] Numerical simulations are used to estimate a probable impactor size, to follow the fate of a projectile, and to calculate an initial tsunami amplitude.

Storzer D. Selo M. Latouche L. Fabre J. The Age ofTenoumer Crater, Mauritania, Revisited [#1183] The weighted mean apatite fission track age for Tenoumer converge to 21.4 ± 9.7 Ka. A previously published K-Ar age of 2.5 ± 0.5 Ma might imply that K-Ar ages of young impact craters on old targets are systematically affected by inherited radiogenic Ar.

146 ______--'34th LPSC Program Tsikalas F. Faleide J. I. Oblique Mj¢lnir Marine Impact: Structural and Geophysical Diagnostic Constraints [#1015] Several diagnostic structural and geophysical signatures substantiate that the 40-km-diameter Mj0lnir marine crater resulted from an oblique impact coming from a south/southwest direction at a 45°-50° angle from the horizontal.

Data Distribution

Beck R. A. Vincent R. K. Watts D. R. Seibert M. Pleva D. Cauley M. Ramos C. Scott T. Harter D. Kosmo J. Ross A. Groneman K. Rojas J. NASA Mobile Lunar and Planetary Science Module [#1008] NASA and university researchers have specified a fundamental suite of scientific instrumentation focused on surface composition determination for the calibration and validation of NASA orbiting sensors for mobile lunar and planetary exploration.

Dykman C. A. Davis C. K. Knowledge Management and the Process of Space Exploration [#1014] This presentation deals with the application of Knowledge Management concepts to organizing, storing, and accessing the vast basis of knowledge that has accumulated during the decades of space exploration.

Kelly S. Crichton D. Hughes J. S. Deploying Object Oriented Data Technology to the Planetary Data System [#1607] JPL deployed a metadata-based software system to the PDS, making it possible to provide data from all Odyssey instruments through a single system immediately upon data delivery. This abstract describes this software system, known as OODT.

Shalygin E. V. Velikodsky Yu. I. Korokhin V. V. Formulas of the Perspective Cartographic Projection for Planets and Asteroids of Arbitrary Shape [#1946] Formulas of transformation between coordinates on image plane, planetocentric coordinates and photometric conditions of observation for arbitrary planet have been obtained. An example with an ellipsoidal planet has been considered.

Small Bodies

Bookamer R. Povenmire H. Povenmire K. I. The Occultation of SAO 60107 by (516) Amherstia on Jan. 14, 2002 [#1203] Asteroid 516 Amherstia occults SAO 60107 on January 14, 2002.

Fauerbach M. Lucas M.P. Mon M. J. LISAA- Low Inclination Search for Approaching Asteroids [#1074] The Egan Observatory is located at 26.5° North latitude, ideally situated to observe a large portion of the southern celestial sphere. The LISAA project is a search and follow-up observation program of NEOs south of the ecliptic plane.

Filonenko V. S. Churyumov K. I. On Phase Dependencies of Cometary Light Curves [#1117] The light curves of 12 comets had been constructed and investigated. The statistical significant influence of phase dependencies on the light curves of seven comets had been found. The values of phase coefficient of these comets had been determined.

34th LPSC Program ______147 Golubeva L. F. Shestopalov D. I. Albedo (750 nm)- Color (9501750 nm) Diagram for the Moon, Asteroids and Meteorites: Modeling Optical Maturation of the Cosmic Body Surfaces [#1096] We show on the albedo-color diagram obtained for the air less cosmic bodies that optical parameters of the primordial unweathered material (meteorites in this case) can move owing to space weathering in ranges known for the Moon and asteroids.

Hiroi T. Moroz L. V. Shingareva T. V. Basilevsky AT. Pieters C. M. Effects of Microsecond Pulse Laser Irradiation on Vis-NIR Reflectance Spectrum of Carbonaceous Chondrite Simulant: Implications for Martian Moons and Primitive Asteroids [#1324] We have performed a simulation of micrometeorite impacts on regoliths made of carbonaceous chondrite materials using microsecond pulse laser irradiation on a CM chondrite simulant. The Vis-NIR spectra of different size fractions of the treated sample show different degrees of alteration.

Llorca J. Trigo-Rodriguez J. M. Borovicka J. Fabregat J. Chemical Abundances of Rock-forming Elements of Cometary Streams Obtained from Meteor Spectroscopy [#1029] Relative chemical abundances of Si, Mg, Fe and Ca obtained from meteor spectroscopy of eight fireballs belonging to well-known cometary streams (Perseid, Cignid, Andromedid, Leonid) are discussed and compared to lP/Halley dust, IDPs and Cl chondrites.

O'Brien D.P. Greenberg R. The Main Belt and NEA Size Distributions: Linked Collisional and Dynamical Evolution [#2018] We model the combined collisional and dynamical evolution of the main belt and NEA populations, and obtain results that are consistent with observations and other constraints. We discuss the implications for the cratering records on asteroids.

Povenmire H. The Occultation of I 4 Piscium by Asteroid (51) Nemausa- September I 1, 1983 [#1039] This article is a review of a well-documented occultation of a star by a main belt asteroid.

Povenmire K. I. Povenmire H. Newly Discovered Meteor Radiants [#1202] Routine photographic patrol of the summer skies revealed five new active meteor radiants.

Sakai T. Tomita N. Nakamura AM. Bidirectional Reflectance of Asteroid Surface Analogues: Quantification of Porosity and SU;rface Roughness [#1618] We have made laboratory measurements of light scattering for powdery layers. We present a systematic relation between bulk porosity and surface roughness. The reflectance of powdery surface is shown to be greatly influenced by the surface structure.

Shestopalov D. I. Sasaki S. Calculations of Optical Effects of the Laser Experiment Imitating Space Weathering of the Cosmic Body Surfaces [#1097] Scaled absorption coefficient of the submicroscopic metallic iron was obtained with the help of olivine spectra altered by nanosecond laser irradiation in a simulation of planetary space weathering.

Shingareva T.V. Basilevsky AT. Fisenko A V. Semjonova L. F. Roshchina I. A. Guseva E. V. Korotaeva N. N. Mineralogy and Petrology of Laser Irradiated Artificial Carbonaceous Chondrite: Implication to the Martian Moons and Some Asteroids [#1321] The laser pulse irradiation of the CM chondrite simulant and L5 chondrite Tsarev led to their dehydration, formation of melt droplets, their partial crystallization and apparent changing of Fe/Mg ratio thus modelling space weathering on small bodies.

l48 ______~34th LPSC Program Mars

Aittola M. Kostama V.-P. Lahtela H. Raitala J. Fluvial Processes Modifications of the Impact Craters in the Greater Hellas Region, Mars [#1538] The appearance of Martian impact craters is due to a number of pre- and post-impact factors. The changes in their appearance may provide information on the local surface geology and on the whole post-impact geological evolution of the area studied.

Bridges J. C. Seabrook A.M. Rothery D. A. Fillinger C. T. Sims M. R. Wright I. P. Revised Target Co-Ordinates for the Beagle 2 Lander [#1606] The revised, IAU 2000 target co-ordinates of the Mars Beagle 2 Lander are 11.6°N, 90.75°E.

Byrnes J. M. de SilvaS. L. Formation of Martian Paterae: Insights from Terrestrial Ignimbrite Shields [#1175] Morphologic comparison of Martian paterae and terrestrial ignimbrite shields suggests similar formation processes: eruption of extensive pyroclastics from low eruption columns, followed by downsagging of the central region and extrusion of lava flows.

Caplinger M. A. Malin M. C. A New Map of Mars [#1901] We describe a new map of Mars compiled from MGS MOC and MOLA datasets.

CarusoP. A. Seismic Triggering Mechanisms of Large-scale Landslides, Valles Marineris [#1525] Large-scale landslides in Valles Marineris wallrock are analyzed using GIS in order to determine what triggering mechanisms caused the landslides. This work confirms that landslides occur where the seismic hazard map forecasts highest seismic slide potential.

Chapman M.G. Larsen G. Lucas S. G. Russell A. J. Tanner L. H. Thordarson T. Study of Terrestrial Terrains Analogous to Martian Layered, Massive, and Thin-bedded Materials [#1890] The Mars Orbiter Camera views have generated new views of possible widespread, layered sediments. In order to test the hypotheses of lacustrine vs. volcanic ash origin for the hematite!LMT deposits, we are studying terrestrial analog rocks.

ColtonS. L. Ferrill D. A. Sims D. W. Wyrick D. Y. Franklin N. M. Methodology for Computer-aided, Interactive Rapid Assessment of Local or Regional Stress Fields on Mars [#2054] We present a method for rapid assessment of stress fields on Mars: (1) mapping geologic structures, (2) calculating stress fields, and (3) determining resolved stresses on faults. Preliminary results are presented for northern Utopia Planitia.

Cord A.M. Pinet P. C. Daydou Y. Chevrel S. Experimental Investigation of the Potential Wavelength Dependence of Hapke Parameters in the Visible and Near Infrared Range [#1548] The full Hapke model is fitted to observations in multiple wavelengths. We study the potential spectral dependence of each parameter.

Cremers D. A. Arp Z. Knight A. K. Scherbarth N. L. Wiens R. C. Maurice S. Salle B. Characteristics of Stand-Off Detection of Geological Samples at Mars Atmosphere Pressure Using Laser-induced Breakdown Spectroscopy (LIBS) [#1654] Laser-Induced Breakdown Spectroscopy (LIBS) is being developed for use on Mars landers and rovers. For this application we are determining characteristics and capabilities of the method for stand-off detection of geological samples using compact lasers, spectrographs, and detectors.

34th LPSC Program ______149 CullS. C. Fractal Dimension of the Upland/Lowland Contact of Deuteronilus Mensae, Mars Implies Shoreline Erosion [#1100] A series of escarpments along the upland/lowland contact of Deuteronilus Mensae, Mars, were analyzed for their fractal dimensions. The escarpments have fractal dimensions ranging from 1.20 to 1.25, nearly identitical to fractals found in Earth shorelines. de Pablo M. A. An Alternative Hypothesis for the Origin and Evolution of Hebes Chasma, Mars [#1072] Here is proposed a preliminary alternative hypothesis about the origin and evolution of Hebes Chasma based on the groundwater circulation and elaborated from the analysis of MOCIMGS images and MOLA/MGS topographic data.

Ferrill D. A. Morris A. P. Waiting D. J. Franklin N. M. Sims D. W. Influence of Gravity on the Geometry of Martian Normal Faults [#2050] Consideration of the effects of gravity on lithostatic stress on Mars indicates that dilational faulting found in the upper 2 km on Earth may extend to depths of 5 km on Mars.

Gatineau D. Mege D. Topographic Profiles Across Valles Marineris Walls: Identification and Extent of Lava Layers in the Volcanic Basement [#1768] Five to ten major strength discontinuities have been identified on Valles Marineris walls. They may represent boundaries between individual volcanic flows or deposits whose extent is on the order of 104-105 km2 at least.

Greeley R. Doggett T. C. Davies A. G. Baker V. Dohm J. Ferre P. A. Hinnell A. Rucker D. Roden J. Stough T. Williams K. K. Beardmore G. Airborne Radar Study of Mars Analogs in the Southwestern United States [#1779] The search for surface and near-surface liquid water on Mars is a central part of current and planned future exploration. We present preliminary results from SAR analog studies at three test sites to remotely measure soil moisture content .

Gulak Yu. K. Dichko I. A. On the Possible Dusty Rings Around Mars [#1077] A prognosis of the possible dusty rings around Mars is proposed at the heights calculated by the Gulak theory (Sov. Astron., 980, v. 24, NI, pp. 84-89): 225.5 + 190.5n kms and (or) commensurably with Phobos and Deimos orbits 1245 + 4639n kms (n = 0,1,2, ... ).

Hauber E. Kronberg P. The Thaumasia "Rift", Mars- Is It a Rift? [#1541] We describe the morphology of a large and complex graben structure in the western Thaumasia region (the Thaumasia graben or "rift"). We consider fault geometries, determine extension, and discuss shortly possible models for its origin.

LaClair D. A. Benison K. C. Could Some Craters on Mars Have Acid Water Origins? [#1127] Some craters on Mars may possibly be a result of acid water deposition. Physical sedimentology experiments using a 39% sulfuric acid solution produced small, circular crater-shaped depressions concentrated along the toes of alluvial fans.

Milam K. A. McSween H. Y. Jr. Moersch J. E. A Wet, Dry, or Hot Gusev Crater?: Using THEMIS and MER to Test Depositional Hypotheses [#1071] This study uses THEMIS, TES, MOC, and MOLA data, and a new surface unit map and stratigraphic sequence to evaluate various depositional hypotheses for Gusev crater. We further examine how a MER landing in Gusev might evaluate depositional models.

150 ______~34th LPSC Program Miyamoto H. Baker V. R. Role of the Manning Coefficient on Progressive Inundation by a Megaflood [#1731] The empirical Manning equation is widely used to analyze megafloods on Earth and Mars, though the Manning resistant coefficient is not easily estimated. We discuss its theoretical background and its role in megaflood inundation processes by numerical simulations.

Morris R. V. GraffT. G. Ming D. W. Mertzman S. A. Bell J. F. III Hydrothermal Alteration on Basaltic Mauna Kea Volcano as a Template for Identification of Hydrothermal Alteration on Basaltic Mars [#1900] The mineralogy of alteration products on Mauna Kea is dominated by hydrolytic, low temperature alteration to palagonite, hydrothermal, acid sulfate alterations to jarosite, alunite, and phyllosilicates, and oxidation by dry heat to hematite.

Nezic Z. Salamuniccar G. Topography Profile Diagrams of Mars: Architecture of the Density of Craters Curve Low-Pass Filter [#1415] The architecture of the low-pass filter required for computation of filtered-density-of-craters curve that is part of topography- profile-diagrams (consisting of filling, gradient and plateau shift low-pass filter and ordinary low-pass filter).

Ohman T. Aittola M. Kostama V.-P. Raitala J. Polygonal Impact Craters as an Indicator of Fracturing- An Example from Greater He !las Region, Mars [#1311] Polygonal impact craters are common in the solar system. They are induced by fractured target. The rim strikes of polygonal craters in greater Hellas region, Mars, reveal radial and concentric fracture patterns around Isidis and Hellas impact basins.

Polit A. T. Sakimoto S. E. H. Mitchell D. E. Grosfils E. B. Geometric Properties of Possible Volcanoes in the South Polar Region, Mars [#1514] We use MOLA data to characterize the geometry of mapped volcanoes, mountains, and previously unidentified possible volcanic edifices in the south polar region of Mars. There are probably 12 more volcanoes than previously identified and possibly more.

Rosenshein E. B. Applicability of Complexity Theory to Martian Fluvial Systems: A Preliminary Analysis [#1660] Terrestrial geomorphology has been revolutionized by the theories of self-organization and self-organized criticality. This work is a preliminary application of these theories to the problems of Martian fluvial landscape evolution.

Ruiz J. Fairen A. G. de Pablo M.A. Thermal Isostasy on Mars [#1090] Local changes in the thermal structure of the martian lithosphere may cause significant changes in the thermal buoyancy of the lithosphere. So, different thermal evolution in distinct areas on Mars must have an expression in the evolution of the martian topography.

Salamuniccar G. Topography Profile Diagrams ofMars: A Step Toward the Formal Proof of Martian Ocean Recession, Timing and Probability [#1403] Introduction to topography-profile-diagrams representation of Martian topography, including topography-profile, density-of- craters, filtered-density-of-craters and level-of-substance-over-time curve, indicating ocean influence on crater distribution.

34th LPSC Program ______151 Shean D. E. Head J. W. Pavonis Mons Fan-shaped Deposits- Smooth Terrain Suiface Ice Deposits [#1154] The smooth facies of the Pavonis Mons fan-shaped deposits are characterized by broad, gentle slopes covered by vast dune fields. We interpret the smooth facies as residual glacier ice deposits that have persisted until the present.

Simpson R. A. Highly Oblique Bistatic Radar Observations Using Mars Global Surveyor [#1270] Transient surface echoes observed during MGS radio occultations are sensitive to antenna pointing errors but also respond to differences in Mars surface properties.

Sims D. W. Morris A. P. Ferrill D. A. Wyrick D. Y. ColtonS. L. Physical Models of Pit Chain Formation over Dilational Faults on Mars [#2099] Analog modeling demonstrates that dilational faulting in cohesive rock beneath cohesionless material will produce pit chains, troughs, and grabens similar to those observed on Mars.

Tanaka K. L. Skinner J. A. Jr. Carr M. H. Gilmore M. S. Hare T. M. Geology of the MER 2003 "Elysium" Candidate Landing Site [#1957] Although chosen mainly for its safety characteristics, new Mars Global Surveyor and Mars Odyssey data suggest that the MER 2003 "Elysium" candidate landing site in southeastern Utopia Planitia also meets basic science requirements for the MER mission involving the geologic activity of water.

Thibodeaux C. J. Washington P. A. De Hon R. A. Determining Water Levels in Maumee and Vedra Valles Using Equilibrium Sediment Transport Theory [#1256] Equilibrium discharge requires water depths between 100m and 250m in Vedra Valles and between 125 and 440 min Maumee Valles in response to longitudinal variations in channel width.

Utley J. A. Schultz R. A. Continuity of Interior Deposits in Western Candor Chasma, Valles Marineris, Mars: Wiped Out by Faulting or Erosion? [#1424] We look at the faulting or erosion of the interior deposits in western Candor Chasma as a first step in understanding their formation and development.

Venturini K. E. Jager K. M. Savasta K. J. Preliminary Analysis of Pit Craters on Alba Patera, Mars Using MOC Data [#1063] We mapped and analyzed small and large pit craters on Alba Patera, Mars using MOC data and MOLA profiles to determine their diameters and volumes.

Zuschneid W. Hauber E. Kronberg P. Jaumann R. Extension Across Valles Marineris and the Thaumasia "Rift", Mars [#1610] We calculate extension from topographic profiles. We find the extension across the "Thaumasia Rift" (0.5-4.5 km), a large and complex graben sytem in the Claritas Fossae region, comparable to that across the Tempe Fossae Rift (2.5-3.1 km), but much lower than across Valles Marineris (9-20 km).

152 ______~34th LPSC Program Program Index * Denotes speaker FC = South Shore Harbour FC

AbboUD. H. Print Only: Impacts Anderson R. C. • Mars Geophysics and Tectonics, Tue, p.m., Salon C AbboUD. H. Poking Holes Posters, Tue, p.m., FC Anderson R. C. Mars Wet and Wild, Thu, a.m., Salon B Abdrakhimov A. M. Print Only: Venus Anderson R. C. Missions and Instruments Posters, Thu, p.m., FC AbeM. Carbonaceous Chondrites Posters, Tue, p.m., FC Anderson S. W. Red Hot Lava Posters, Tue, p.m., FC AbeY. Mars Atmosphere Posters, Tue, p.m., FC AndreS. L. Moon and Mercury Posters, Tue, p.m., FC AbeY. Evolution of the Early Earth, Thu, p.m., Salon C AndreS. L* Ordinary Chondrites, Thu, p.m., Salon A AbellP. A. Asteroids and Comets, Wed, a.m., Salon C AngeliC!. Asteroids and Cornets Posters, Thu, p.m., FC AbellP. A* Asteroids and Comets, Wed, a.m., Salon C Anguita F. Venus Posters, Thu, p.m., FC Abe-Ouchi A. Mars Atmosphere Posters, Tue, p.m., FC Antonenko I. Mars Surface Posters, Tue, p.m., FC Abramov O. Digging Deeper Posters, Tue, p.m., FC Anwar S. Mars Odyssey Posters, Tue, p.m., FC AbreuN. M* Carbonaceous Chondrites, Tue, a.m., Marina Plaza Aramovich C. I. Ordinary Chondrites, Thu, p.m., Salon A Accomazzi A. Maps ·n Bits Posters, Tue, p.m., FC Aramovich C. I. • Ordinary Chondrites, Thu, p.m., Salon A AchariM. Mars Wet and Wild Posters, Thu, p.m., FC Archinal B. A. MER 2003 Landing Sites Posters, Tue, p.m., FC Acton C. H. Jr. Mars Missions Posters, Thu, p.m., FC Archinal B. A. Maps 'n Bits Posters, Tue, p.m., FC AdamsM. Astrobiology Posters, Thu, p.m., FC Arfstrom I. D.* Cold and Windy on Mars, Wed, a.m., Salon B AdamsP. M. Mars Surface Composition, Tue, a.m., Salon B Arfstrom I. D.* Recent Water on Mars, Thu, p.m., Salon B Adams P.M. Mars Surface Posters, Tue, p.m., FC Arkani-Hamed I.* Mars Geophysics and Tectonics, Tue, p.m., Salon C AdlerM. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Arkani-Hamedi.A.H. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Agee C. Lunar Basalts, Moo, a.m., Salon A Arloti.-E. Asteroids and Cornets Posters, Thu, p.m., FC Agee C. B.* Evolution of the Martian Interior, Wed, p.m., Salon C Arneson H. M. Future Mars and Asteroid Missions, Fri, a.m., Salon C Abaronson O. Mars Geophysics and Tectonics, Tue, p.m., Salon C ArnouH. I. Astrobiology Posters, Thu, p.m., FC Aharonson O. Io and Beyond, Wed, a.m., Salon A Arp Z. Print Only: Mars Aharonson O. Cold and Windy on Mars, Wed, a.m., Salon B Arpigny C. lOPs: Comets and Asteroids, Wed, p.m., Salon A Aharonson O. * Cold and Windy on Mars, Wed, a.m., Salon B Arroyo B. Mars Missions Posters, Thu, p.m., FC Ahrens T. J.* Poking Holes, Mon, a.m., Salon C Artemieva N. A. Poking Holes Posters, Tue, p.m., FC Ahrens T. J. Chicxulub Scientifc Drilling, Mon, p.m., Salon C ArtzR.R. E. Astrobiology Posters, Thu, p.m., FC Ahrens T. J. Digging Deeper, Tue, a.m., Salon C ArvidsonR. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Ahrens T. I. Martian Meteorites, Wed, a.m., Marina Plaza Arvidson R. E. Mars Surface Composition, Tue, a.m., Salon B Airieau S. Astrobiology Posters, Thu, p.m., FC Arvidson R. E. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B AiuolaM. Print Only: Mars Arvidson R. E. MER 2003 Landing Sites Posters, Tue, p.m., FC AiUolaM. Venus Posters, Thu, p.m., FC Arvidson R. E. Mars Odyssey Posters, Tue, p.m., FC Akridge D. G. Meteoritic Potpourri Posters, Tue, p.m., FC Arvidson R. E. Mars Missions Posters, Thu, p.m., FC Akridge I. M. C. Meteoritic Potpourri Posters, Tue, p.m., FC AshR.D. Carbonaceous Chondrites, Tue, p.m., Marina Plaza AlardO. Carbonaceous Chondrites, Tue, p.m., Marina Plaza AshR. D. CAis, Fri, a.m., Marina Plaza Albarede F. Evolution of the Early Earth, Thu, p.m., Salon C Ash R. D* CAis, Fri, a.m., Marina Plaza Albarran G. Astrobiology Posters, Thu, p.m., FC AsimowP.D. CAis, Fri, a.m., Marina Plaza Albin E. F. Mars Impacts Posters, Thu, p.m., FC Asmar S. W. Lunar Geophysics Posters, Thu, p.m., FC Alena R. Mars Missions Posters, Thu, p.m., FC AsmeromY. Martian Meteorites, Wed, a.m., Marina Plaza Aleon I.* lOPs: Comets and Asteroids, Wed, p.m., Salon A AsphaugE. Print Only: Origins Alexander C. M. OD. Carbonaceous Chondrites, Tue, p.m., Marina Plaza AsphaugE. Print Only: Missions and Instruments Alexander C. M. OD. Carbonaceous Chondrites Posters, Tue, p.m., FC Asphaug E. Poking Holes, Mon, a.m., Salon C Alexander C. M. OD. • Origins of Planetary Systems, Thu, a.m., Salon C AsphaugE. Digging Deeper, Tue, a.m., Salon C Alexander C. M. OD. Ordinary Chondrites, Thu, p.m., Salon A AsphaugE. Digging Deeper Posters, Tue, p.m., FC Alexander C. M. OD. Presolar Grains, Thu, p.m., Marina Plaza AsphaugE. Maps 'n Bits Posters, Tue, p.m., FC Alexeev V. A. Print Only: Meteorites AsphaugE. lo and Beyond, Wed, a.m., Salon A Allegre c. I. Poking Holes, Mon, a.m., Salon C AsphaugE. Asteroids and Comets, Wed, a.m., Salon C AllemandP. Maps 'n Bits Posters, Tue, p.m., FC AsphaugE.* Future Mars and Asteroid Missions, Fri, a.m., Salon C Allen C. Astrobiology Posters, Thu, p.m., FC Asphaug E. I. Mars Wet and Wild Posters, Thu, p.m., FC Allen C. C.* Astrobiology: New Detectives, Fri, a.m., Salon A Asphaug E. I. Missions and Instruments Posters, Thu, p.m., FC Alieni. S. EIPO Demonstrations, Sun, p.m., LPI Aspler L. B. Venus Posters, Thu, p.m., FC Alieni. S. Education and Public Outreach Posters, Thu, p.m., FC Atabaev B. G. Space Weather, Mon, p.m., Salon A AllenP. I* Poking Holes, Mon, a.m., Salon C Athena Science Team Future Mars and Asteroid Missions, Fri, a.m., Salon C Allton I. H. Missions and Instruments Posters, Thu, p.m., FC AtweiiW. Print Only: Mars Odyssey AI-Mishwat A. T. Poking Holes Posters, Tue, p.m., FC AtwellW. Mars Odyssey, Mon, a.m., Salon B AltobelliN. lOPs: Comets and Asteroids, Wed, p.m., Salon A AtweiiW. Mars Odyssey Posters, Tue, p.m., FC Amari S. Presolar Grains, Thu, p.m., Marina Plaza BackmanV. Mars Instruments Posters, Thu, p.m., FC Amari S. * Presolar Grains, Thu, p.m., Marina Plaza Bader C. E. Outer Body Experiences Posters, Tue, p.m., FC AmelinY. Chondrules Posters, Tue, p.m., FC Badjukov D. D. Print Only: Impacts Amelio Y. CAis Posters, Thu, p.m., FC Badjukov D. D. Poking Holes Posters, Tue, p.m., FC Ametrano S. I. Achondrites, Wed, p.m., Marina Plaza Bailey E. Evolution of the Early Earth, Thu, p.m., Salon C AmilsR. Astrobiology Posters, Thu, p.m., FC Bailey J. V. Martian Meteorites Posters, Thu, p.m., FC AnandM.* Space Weather, Mon, p.m., Salon A Baker J. A. Basaltic Achondrites, Thu, a.m., Marina Plaza AnandM. Moon and Mercury Posters, Tue, p.m., FC Baker L. Ordinary Chondrites, Thu, p.m., Salon A AnandM. Meteoritic Potpourri Posters, Tue, p.m., FC Baker L. Mars Instruments Posters, Thu, p.m., FC AnandM. Basaltic Achondrites, Thu, a.m., Marina Plaza BakerY. Print Only: Mars AnandM. Achondrites Posters, Thu, p.m., FC BakerY. Mars Geophysics and Tectonics, Tue, p.m., Salon C Andersen V. Print Only: Moon Baker V. Missions and Instruments Posters, Thu, p.m., FC Andersen V. Print Only: Mars Odyssey Baker V. R. Print Only: Mars Andersen V. Mars Odyssey, Mon, a.m., Salon B BakerY. R. Mars Volcanism, Mon, p.m., Salon B Andersen V. Mars Odyssey Posters, Tue, p.m., FC Baker V. R. Mars Wet and Wild, Thu, a.m., Salon B Anderson F. S. • Mars Surface Composition, Tue, a.m., Salon B BakerY. R.* Recent Water on Mars, Thu, p.m., Salon B Anderson F. S. Venus, Thu, a.m., SalonA BakerY. R. Mars Wet and Wild Posters, Thu, p.m., FC Anderson I. L. B. Digging Deeper Posters, Tue, p.m., FC BalanzatE. Print Only: Astrobiology

34th LPSC Program Index ______153 Baldridge A. Mars Surface Posters, Tue, p.m., FC BenderS. C. Lunar Remote Sensing Posters, Thu, p.m., FC Baldwin S. L. Mars Instruments Posters, Thu, p.m., FC Benedix G. K. Basaltic Achondrites, Thu, a.m., Marina Plaza Baliva A. Poking Holes Posters, Tue, p.m., FC Benedix G. K. Ordinary Chondrites, Thu, p.m., Salon A Baliva A. Missions and Instruments Posters, Thu, p.m., FC Benedix G. K. * Ordinary Chondrites, Thu, p.m., Salon A BalmeM. R. Mars Aeolian Processes Posters, Thu, p.m., FC Benedix G. K. Terrestrial Planets Posters, Thu, p.m., FC Balog P. Evolution of the Early Earth, Thu, p.m., Salon C Benison K. C. Print Only: Mars Baloga S. Red Hot Lava Posters, Tue, p.m., FC Benison K. C. Future Mars and Asteroid Missions, Fri, a.m., Salon C Baloga S. Mars Impacts Posters, Thu, p.m., FC Benkhoff J. Future Mars and Asteroid Missions, Fri, a.m., Salon C Baloga S. M. * Mars Volcanism, Mon, p.m., Salon B Bennett A. Lunar Remote Sensing Posters, Thu, p.m., FC BalogaS. M. Red Hot Lava Posters, Tue, p.m., FC Benoit P. H. Space Weather, Mon, p.m., Salon A BalogaS. M. Venus Posters, Thu, p.m., FC Benoit P. H. Meteoritic Potpourri Posters, Tue, p.m., FC BalogaS. M. Mars Impacts Posters, Thu, p.m., FC Benoit P. H. Asteroids and Comets, Wed, a.m., Salon C Bandfield J. L. Mars Odyssey, Mon, a.m., Salon B Benoit P. H.* Asteroids and Comets, Wed, a.m., Salon C Bandfield J. L* Mars Surface Composition, Tue, a.m., Salon B Benoit P. H. Ordinary Chondrites, Thu, p.m., Salon A Banerd! W. B. Lunar Science, Tue, p.m., Salon A Benoit P. H. Recent Water on Mars, Thu, p.m., Salon B Banerd! W. B. Mars Geophysics and Tectonics, Tue, p.m., Salon C Benz W. Missions and Instruments, Thu, a.m., Salon A BaratouxD. Poking Holes Posters, Tue, p.m., FC Benz W. Evolution of the Early Earth, Thu, p.m., Salon C BaratouxD. Maps 'n Bits Posters, Tue, p.m., FC Berczi Sz. Print Only: Education Barber C. A. Mars Geomorphology, Wed, p.m., Salon B Berczi Sz. EIPO Demonstrations, Sun, p.m., LPI Bar-Cohen Y. Missions and Instruments Posters, Thu, p.m., FC Berczi Sz. Education and Public Outreach Posters, Thu, p.m., FC Bare C. Red Hot Lava Posters, Tue, p.m., FC Berczi Sz. Missions and Instruments Posters, Thu, p.m., FC Barge L. B. Print Only: Origins Berczi Sz. Astrobiology Posters, Thu, p.m., FC Barker E. S. Outer Body Experiences Posters, Tue, p.m., FC Berezhnoy A. A. Lunar Remote Sensing Posters, Thu, p.m., FC Barlow N. G.* Recent Water on Mars, Thu, p.m., Salon B Berlin J. Ordinary Chondrites Posters, Thu, p.m., FC Barnard L. Io and Beyond, Wed, a.m., Salon A Berman D. C. Mars Geomorphology Posters, Thu, p.m., FC Barnouin-Jha O. Asteroids and Comets Posters, Thu, p.m., FC Bematowicz T. Presolar Grains, Thu, p.m., Marina Plaza Barnouin-Jha O. S. Digging Deeper Posters, Tue, p.m., FC Bernatowicz T. J. Presolar Grains, Thu, p.m., Marina Plaza Barnouin-Jha O. S. Mars Geomorphology Posters, Thu, p.m., FC Berry F. J. Carbonaceous Chondrites Posters, Tue, p.m., FC Barnouin-Jha O. S. Mars Impacts Posters, Thu, p.m., FC Bertka C. M. Evolution of the Martian Interior, Wed, p.m., Salon C BaronM. Print Only: Astrobiology Bevill T. J. Missions and Instruments Posters, Thu, p.m., FC Barr A. C.* Moving and Grooving Ice, Tue, a.m., Salon A BeyerR. A. Mars Volcanism, Mon, p.m., Salon B Barr A. C. Outer Body Experiences Posters, Tue, p.m., FC BeyerR. A.* Mars Geomorphology, Wed, p.m., Salon B Barraclough B. L. Mars Odyssey Posters, Tue, p.m., FC Bezard B. Print Only: Outer Planets Barraclough B. L. * Missions and Instruments, Thu, a.m., Salon A Bhattacharya R. N. Moon and Mercury Posters, Tue, p.m., FC Barrat J. A. Martian Meteorites, Wed, a.m., Marina Plaza BibringJ. P. Mars Missions Posters, Thu, p.m., FC Bart G. D.* Moving and Grooving Ice, Tue, a.m., Salon A Billings S. E. Outer Body Experiences Posters, Tue, p.m., FC Bashkirov A. G. Print Only: Origins Bills B. G.* Io and Beyond, Wed, a.m., Salon A Basilevsky A. T. Print Only: Small Bodies Bills B. G. Venus Posters, Thu, p.m., FC Basilevsky A. T. Mars Odyssey Posters, Tue, p.m., FC Binet L. Carbonaceous Chondrites Posters, Tue, p.m., FC Basilevsky A. T. Mars Geologic Mapping Posters, Tue, p.m., FC Binet L.* Astrobiology: New Detectives, Fri, a.m., Salon A Basilevsky A. T* Venus, Thu, a.m., Salon A Binzel R. P. Asteroids and Comets, Wed, a.m., Salon C Basiuk E. V. Astrobiology Posters, Thu, p.m., FC BinzelR. P. Asteroids and Comets Posters, Thu, p.m., FC Basiuk V. A. Origins of Planetary Systems Posters, Thu, p.m., FC Binze! R. P. Future Mars and Asteroid Missions, Fri, a.m., Salon C BasiukV. A. Astrobiology Posters, Thu, p.m., FC Birck J. L. Poking Holes, Moo, a.m., Salon C Bass D. Mars Atmosphere Posters, Tue, p.m., FC Biris A. S. Mars Instruments Posters, Thu, p.m., FC Bass D. S. Mars Bipolar Syndrome Posters, Thu, p.m., FC Bischoff A. Print Only: Meteorites BasuA. Poking Holes, Mon, a.m., Salon C Bischoff A. Ordinary Chondrites Posters, Thu, p.m., FC Basu A.* Space Weather, Mon, p.m., Salon A BishD. L. Missions and Instruments Posters, Thu, p.m., FC BasuA. Moon and Mercury Posters, Tue, p.m., FC BishD. L.* Mars Geology, Fri, a.m., Salon B Batchelor J. D. Meteoritic Potpourri Posters, Tue, p.m., FC Bishop J. L. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Baumgardner J. R. Mars Impacts Posters, Thu, p.m., FC Bishop J. L.* Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Baur H. Print Only: Meteorites Bishop J. L. Mars Surface Posters, Tue, p.m., FC BaurH. Meteoritic Potpourri Posters, Tue, p.m., FC Bishop J. L. Mars Missions Posters, Thu, p.m., FC Baur H. Evolution of the Early Earth, Thu, p.m., Salon C BizzarroM. Basaltic Achondrites, Thu, a.m., Marina Plaza BaurH. Terrestrial Planets Posters, Thu, p.m., FC Blackhurst R. L. Astrobiology Posters, Thu, p.m., FC Bazylinski D. A. Astrobiology: New Detectives, Fri, a.m., Salon A Blake D. F. Missions and Instruments Posters, Thu, p.m., FC Beall G. H. Mars Instruments Posters, Thu, p.m., FC BlandP. A.* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Beard B. L. Moon and Mercury Posters, Tue, p.m., FC BlandP. A. Poking Holes Posters, Tue, p.m., FC Beardmore G. Print Only: Mars Bland P. A. Carbonaceous Chondrites Posters, Tue, p.m., FC BeckA. R.* Lunar Basalts, Mon, a.m., Salon A Blaney D. L. Outer Body Experiences Posters, Tue, p.m., FC BeckR. A. Print Only: Data Distribution Blaney D. L. Io and Beyond, Wed, a.m., Salon A BeckerH* Achondrites, Wed, p.m., Marina Plaza Bleacher J. E. Red Hot Lava Posters, Tue, p.m., FC BeckerL. Poking Holes, Mon, a.m., Salon C Blewett D. T. * Space Weather, Moo, p.m., Salon A Becker L.* Evolution of the Early Earth, Thu, p.m., Salon C Blewett D. T. Lunar Science, Tue, p.m., Salon A BeckerT. Lunar Remote Sensing Posters, Thu, p.m., FC Blewett D. T. Lunar Remote Sensing Posters, Thu, p.m., FC BeckerT. L. Lunar Remote Sensing Posters, Thu, p.m., FC Blichert-Toft J. Evolution of the Early Earth, Thu, p.m., Salon C Beecher N. A. Basaltic Achondrites, Thu, a.m., Marina Plaza Block B. Astrobiology Posters, Thu, p.m., FC Beegle L. W. Carbonaceous Chondrites Posters, Tue, p.m., FC Blondes M. S. Venus Posters, Thu, p.m., FC Beegle L. W. Mars Instruments Posters, Thu, p.m., FC BlueJ. Print Only: Venus Beegle L. W. Astrobiology Posters, Thu, p.m., FC BoctorN. Z. Carbonaceous Chondrites Posters, Tue, p.m., FC Beegle L. W. Astrobiology: New Detectives, Fri, a.m., Salon A Bode R. Mars Instruments Posters, Thu, p.m., FC Beiersdorfer R. E. Education and Public Outreach Posters, Thu, p.m., FC Boesenherg J. S. Chondrules Posters, Tue, p.m., FC BellJ.F.III Print Only: Mars Boesenherg J. S. Achondrites, Wed, p.m., Marina Plaza Bell J. F. III Mars Odyssey, Mon, a.m., Salon B Boesenherg J. S. * Basaltic Achondrites, Thu, a.m., Marina Plaza Bell J. F. III* Mars Odyssey, Mon, a.m., Salon B Bogard D. Achondrites Posters, Thu, p.m., FC Bell J. F. III Asteroids and Comets, Wed, a.m., Salon C Bogard D. D.* Basaltic Achondrites, Thu, a.m., Marina Plaza BeliJ. F.lll* Future Mars and Asteroid Missions, Fri, a.m., Salon C Bogard D. D. Ordinary Chondrites Posters, Thu, p.m., FC Belton M. J. S. Print Only: Missions and Instruments Bogdanovski O. Origins of Planetary Systems, Thu, a.m., Salon C BenderK. C. Mars Odyssey, Mon, a.m., Salon B Boggs D. H. Lunar Geophysics Posters, Thu, p.m., FC Bender K. C. Mars Odyssey Posters, Tue, p.m., FC BondT. Print Only: Venus

154 34th LPSC Program Index Bondarenko N. V. * Venus, Thu, a.m., Salon A Buhler C. R. Mars Instruments Posters, Thu, p.m., FC Bonello G. Mars Missions Posters, Thu, p.m., FC Bullock E. S. Carbonaceous Chondrites Posters, Tue, p.m., FC Bonhomme C. Carbonaceous Chondrites, Tue, p.m., Marina Plaza BulmerM. Mars Volcanism, Mon, p.m., Salon B Bookamer R. Print Only: Small Bodies BulmerM. H. Mars Geomorphology Posters, Thu, p.m., FC Borg L. E.* Martian Meteorites, Wed, a.m., Marina Plaza Bulow R. C. Lunar Geophysics Posters, Thu, p.m., FC Borg L. E. Martian Meteorites Posters, Thu, p.m., FC BuntingJ. A. Poking Holes Posters, Tue, p.m., FC Borovicka J. Print Only: Small Bodies Burba G. A. Print Only: Venus Boss A. P.* Origins of Planetary Systems, Thu, a.m., Salon C Burbine T. H.* Evolution of the Early Earth, Thu, p.m, Salon C Boss A. P. Origins of Planetary Systems Posters, Thu, p.m., FC Burbine T. H. Asteroids and Comets Posters, Thu, p.m., FC Botta O. Mars Geology, Fri, a.m., Salon B Burckle L. H. Poking Holes Posters, Tue, p.m., FC Bottke W. F.* Io and Beyond, Wed, a.m., Salon A Burnett D. S. Missions and Instruments, Thu, a.m., Salon A Bottke W. F. Jr. Asteroids and Comets, Wed, a.m., Salon C Burnett D. S. CA!s, Fri, a.m., Marina Plaza BoudinN. Mars Geology, Fri, a.m., Salon B BurrO. Mars Geomorphology, Wed, p.m., Salon B Bougher S. Mars Odyssey, Mon, a.m., Salon B Burr D. M. Mars Volcanism, Mon, p.m., Salon B Bouikine A. I. Basaltic Achondrites, Thu, a.m., Marina Plaza BurrO. M. Mars Wet and Wild Posters, Thu, p.m., FC BourkeM. Mars Wet and Wild Posters, Thu, p.m., FC Burt D. Mars Surface Posters, Tue, p.m., FC Bourke M. C.* Cold and Windy on Mars, Wed, a.m., Salon B Bus S. J. Asteroids and Comets, Wed, a.m., Salon C Bourke M. C. Mars Aeolian Processes Posters, Thu, p.m., FC Bus S. J. Asteroids and Comets Posters, Thu, p.m, FC Bourot-Denise M. The Wrath of Khandrules, Mon, a.m., Marina Plaza BuseckP. R. Carbonaceous Chondrites, Tue, a.m., Marina Plaza Boutin D. B. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Buseck P.R. Carbonaceous Chondrites Posters, Tue, p.m., FC Bowman C. D. Education and Public Outreach Posters, Thu, p.m., FC Buseck P. R. * Astrobiology: New Detectives, Fri, a.m., Salon A Boyce J. Mars Geomorphology, Wed, p.m., Salon B Busemann H.* Evolution of the Early Earth, Thu, p.m., Salon C Boyce J. M.* Mars Wet and Wild, Thu, a.m., Salon B BusemannH. Terrestrial Planets Posters, Thu, p.m., FC Boyce J. M. Mars Impacts Posters, Thu, p.m., FC Bussey D. B. J. Lunar Science, Tue, p.m., Salon A Boyd H. Poking Holes Posters, Tue, p.m., FC Bussey D. B. J. South Pole-Aitken Posters, Tue, p.m., FC BoyetM.* Evolution of the Early Earth, Thu, p.m., Salon C Bussey D. B. J. Lunar Remote Sensing Posters, Thu, p.m., FC BoyntonW. Mars Odyssey, Mon, a.m., Salon B BussoM. Presolar Grains, Thu, p.m., Marina Plaza BoyntonW. Mars Odyssey Posters, Tue, p.m., FC Butera F. Missions and Instruments Posters, Thu, p.m., FC Boynton W. M. EIPO Demonstrations, Sun, p.m., LPI ButmanS. Mars Missions Posters, Thu, p.m., FC Boynton W. V. Mars Odyssey, Mon, a.m., Salon B Byerly G. R. Poking Holes Posters, Tue, p.m., FC Boynton W. V.* Mars Odyssey, Mon, a.m., Salon B Byerly G. R. Terrestrial Planets Posters, Thu, p.m., FC Boynton W. V. Mars Odyssey Posters, Tue, p.m., FC Byrne C. J. Print Only: Moon Boynton W. V. Mars Instruments Posters, Thu, p.m., FC BymeC.J. Lunar Remote Sensing Posters, Thu, p.m., FC Boynton W. V. Ordinary Chondrites Posters, Thu, p.m., FC ByrneM. Print Only: Astrobiology Boynton W. V. Achondrites Posters, Thu, p.m., FC Byrne S. Cold and Windy on Mars, Wed, a.m., Salon B Brachfeld S. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Byrnes J. M. Print Only: Mars Bradak B. Outer Body Experiences Posters, Tue, p.m., FC CabroiN. A. Print Only: Astrobiology Bradak B. Education and Public Outreach Posters, Thu, p.m., FC Cabrol N. A.* Astrobiology: New Detectives, Fri, a.m., Salon A Bradley J. P. lOPs: Comets and Asteroids, Wed, p.m., Salon A Cahill J. Meteoritic Potpourri Posters, Tue, p.m., FC Bradley J.P. Interplanetary Dust Posters, Thu, p.m., FC Caldwell A. Education and Public Outreach Posters, Thu, p.m., FC Bralower T. J. Chicxulub Posters, Tue, p.m., FC Calef F. J. III Water on Mars Posters, Thu, p.m., FC Brandon A. D.* Evolution of the Early Earth, Thu, p.m., Salon C Calle C. I. Mars Atmosphere Posters, Tue, p.m., FC Brandstlltter F. Print Only: Meteorites Calle C. I. Mars Instruments Posters, Thu, p.m., FC Brandstatter F. Print Only: Impacts Cameron A. G. W* Origins of Planetary Systems, Thu, a.m., Salon C Brandstlltter F. Poking Holes, Mon, a.m., Salon C Campbell A. J. Carbonaceous Chondrites, Tue, a.m, Marina Plaza Brandstlltter F. Basaltic Achondrites, Thu, a.m., Marina Plaza Campbell A. J.* Carbonaceous Chondrites, Tue, a.m., Marina Plaza Brandstlltter F. Ordinary Chondrites Posters, Thu, p.m., FC Campbell A. J. Moon and Mercury Posters, Tue, p.m., FC Brasier M. D. Astrobiology: New Detectives, Fri, a.m., Salon A Campbell A. J. Rocks Made to Order Posters, Tue, p.m., FC Brearley A. J. The Wrath of Khandrules, Mon, a.m., Marina Plaza Campbell A. J. Achondrites, Wed, p.m., Marina Plaza Brearley A. J. Carbonaceous Chondrites, Tue, a.m., Marina Plaza Campbell A. J. Evolution of the Early Earth, Thu, p.m., Salon C Brearley A. J. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Campbell B. A. Venus, Thu, a.m., Salon A Brearley A. J.* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Campbell B. A. Lunar Remote Sensing Posters, Thu, p.m., FC Brearley A. J. Astrobiology: New Detectives, Fri, a.m., Salon A Campbell B. A. Mars Wet and Wild Posters, Thu, p.m., FC Bremmer R. R. Missions and Instruments, Thu, a.m., Salon A Campbell D. B. Venus, Thu, a.m., Salon A Brenker F. E. Carbonaceous Chondrites, Tue, a.m., Marina Plaza Campbell D. B. Lunar Remote Sensing Posters, Thu, p.m., FC Brenker F. E. Martian Meteorites Posters, Thu, p.m., FC Campbell M. M. Venus Posters, Thu, p.m., FC Brennetot R. Mars Instruments Posters, Thu, p.m., FC Campbell T. J. Venus Posters, Thu, p.m., FC Brewer J. Meteoritic Potpourri Posters, Tue, p.m., FC Campi R. A. Education and Public Outreach Posters, Thu, p.m., FC BrianA. W. Print Only: Venus Canfield D. E. Astrobiology Posters, Thu, p.m., FC Bridges J. C. Print Only: Mars Cangahuala A. Print Only: Missions and Instruments Bridges N. T. * Cold and Windy on Mars, Wed, a.m., Salon B CanupR. M. Print Only: Origins Bridges N. T. Recent Water on Mars, Thu, p.m., Salon B CaplingerM. Mars Odyssey, Mon, a.m., Salon B Brightwell S. N. Mars Bipolar Syndrome Posters, Thu, p.m., FC Caplinger M. A. Print Only: Mars Britt D. T. Ordinary Chondrites, Thu, p.m., Salon A Capmas F. Poking Holes, Mon, a.m., Salon C BrittO. T. Missions and Instruments Posters, Thu, p.m., FC Capote R. Venus Posters, Thu, p.m., FC BrittonJ. T. Astrobiology Posters, Thu, p.m., FC Carey J. W. Mars Geology, Fri, a.m., Salon B Brown D. Future Mars and Asteroid Missions, Fri, a.m., Salon C CarlsonR. Io and Beyond, Wed, a.m., Salon A BrownK. Mars Instruments Posters, Thu, p.m., FC Carpenter P. K. Achondrites Posters, Thu, p.m., FC BrowningL Water on Mars Posters, Thu, p.m., FC CarrM. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Brownlee D. lOPs: Comets and Asteroids, Wed, p.m., Salon A CarrM. H. Print Only: Mars Brownlee D. E. lOPs: Comets and Asteroids, Wed, p.m., Salon A Carruba V. Print Only: Education Brownlee D. E. Interplanetary Dust Posters, Thu, p.m., FC CarterL. M. Print Only: Education Bruckner J. Mars Odyssey, Mon, a.m., Salon B Carter L. M. * Venus, Thu, a.m., Salon A BrUckner J. Mars Odyssey, Mon, a.m., Salon B CarusoP. A. Print Only: Mars Bruesch L. S. * Io and Beyond, Wed, a.m., Salon A CastanoR. Missions and Instruments Posters, Thu, p.m., FC BrumbyS. Maps 'n Bits Posters, Tue, p.m., FC Castiglione P. Mars Instruments Posters, Thu, p.m., FC BuchananP. C.* Basaltic Achondrites, Thu, a.m., Marina Plaza Castilla G. Print Only: Education Buczkowski D. L. * Mars Geophysics and Tectonics, Tue, p.m., Salon C CastleN. MER 2003 Landing Sites Posters, Tue, p.m., FC Buehler M. G. Mars Instruments Posters, Thu, p.m. FC CauleyM. Print Only: Data Distribution Buhler C. R. Mars Atmosphere Posters, Tue, p.m., FC ChabotN. A. Astrobiology Posters, Thu, p.m., FC

34th LPSC Program Index------155 ChabotN. L* Achondrites, Wed, p.m., Marina Plaza Clayton R.N. Presolar Grains, Thu, p.m., Marina Plaza Chadwick J. Mars Volcanism, Mon, p.m., Salon B Cleghorn T. Print Only: Mars Odyssey Chafetz H. S. Astrobiology Posters, Thu, p.m., FC Cleghorn T. Mars Odyssey, Mon, a.m., Salon B Chamberlain M. A. Mars Odyssey Posters, Tue, p.m., FC Cleghorn T. Mars Odyssey Posters, Tue, p.m., FC Chambers J. E. Astrobiology Posters, Thu, p.m., FC Cleghorn T. F* Mars Odyssey, Mon, a.m., Salon B Chan C. C. Future Mars and Asteroid Missions, Fri, a.m., Salon C ClemettS. J. Astrobiology: New Detectives, Fri, a.m., Salon A Chapman C. R Mars Impacts Posters, Thu, p.m.,. FC Clifford S. M* Recent Water on Mars, Thu, p.m., Salon B Chapman M. G. Print Only: Mars Clifford S. M. Mars Wet and Wild Posters, Thu, p.m., FC Chapman M. G. Red Hot Lava Posters, Tue, p.m., FC Cloutis E. A. Mars Surface Posters, Tue, p.m., FC Chappel ow J. E. Mars Impacts Posters, Thu, p.m., FC Cloutis E. A. Asteroids and Comets Posters, Thu, p.m., FC Chase z. A J.* Mars Volcanism, Mon, p.m., Salon B Coates A. J. Future Mars and Asteroid Missions, Fri, a.m., Salon C Chatterjee N. Moon and Mercury Posters, Tue, p.m., FC Cochrane C. G. Venus Posters, Thu, p.m., FC Chauhan R. V. Mars Impacts Posters, Thu, p.m., FC Cody G. D.* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Chaussidon M. Nucleosynthesis, Mon, p.m.. Marina Plaza Cody G. D. Carbonaceous Chondrites Posters, Tue, p.m., FC Chaussidon M. IDPs: Comets and Asteroids, Wed, p.m., Salon A Cohen B. A. SPA Sample Return, Mon, a.m., Salon A Chaussidon M. CA!s, Fri, a.m., Marina Plaza Cohen B. A. Lunar Science, Tue, p.m., Salon A Chaussidon M. * CA!s, Fri, a.m., Marina Plaza Cohen B. A* Achondrites, Wed, p.m., Marina Plaza Chavez D. Education and Public Outreach Posters, Thu, p.m., FC Cole K. J. Ordinary Chondrites Posters, Thu, p.m., FC Chen J. H.* Origins of Planetary Systems, Thu, a.m., Salon C Coleman N. M. Mars Wet and Wild, Thu, a.m., Salon B Chen K. Mars Instruments Posters, Thu, p.m., FC CollierM. L. Mars Wet and Wild Posters, Thu, p.m., FC ChenetH. Lunar Geophysics Posters, Thu, p.m., FC Collins G. C. Moving and Grooving Ice, Tue, a.m., Salon A Cheng A. F. Asteroids and Comets Posters, Thu, p.m., FC Collins G. C. Outer Body Experiences Posters, Tue, p.m., FC Cherednik L L Mars Odyssey, Mon, a.m., Salon B Collins G. S. * Poking Holes, Mon, a.m., Salon C Cherednik L. L. Mars Odyssey Posters, Tue, p.m., FC Collins G. S. Mars Geomorphology Posters, Thu, p.m., FC Cherniak D. J. Lunar Science, Tue, p.m., Salon A ColtonS. L. Print Only: Mars Chevrel S. Print Only: Mars ColtonS. L. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Chevrel S. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B ColweliJ. Missions and Instruments Posters, Tbu, p.m., FC Chevrel S. Lunar Remote Sensing Posters, Thu, p.m., FC ColweliJ. Future Mars and Asteroid Missions, Fri, a.m., Salon C Chevrel S. Mars Instruments Posters, Thu, p.m., FC ColweliJ. E* Digging Deeper, Tue, a.m., Salon C Chicarro A C. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Comstock R L. Venus Posters, Thu, p.m., FC Chicarro A. F* Missions and Instruments, Thu, a.m., Salon A Connolly H. C. Jr.* The Wrath of Khandrules, Mon, a.m., Marina Plaza Chicarro A. F. Mars Missions Posters, Thu, p.m., FC Connolly H. C. Jr. Carbonaceous Chondrites, Tue, a.m., Marina Plaza ChienS. Missions and Instruments Posters, Thu, p.m., FC Connolly H. C. Jr. Missions and Instruments, Thu, a.m., Salon A Chio C. H. Mars Instruments Posters, Thu, p.m., FC Connolly H. C. Jr. CA!s, Fri, a.m., Marina Plaza Chip era S. J. Missions and Instruments Posters, Thu, p.m., FC Consolmagno G. J. Moon and Mercury Posters, Tue, p.m., FC Chizmadia L. IDPs: Comets and Asteroids, Wed, p.m., Salon A Cook A. C. Moon and Mercury Posters, Tue, p.m., FC Chizmadia L J.* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Cook D. Maps 'n Bits Posters, Tue, p.m., FC ChoJ. Y-K. Mars Impacts Posters, Thu, p.m., FC Cook D. Lunar Remote Sensing Posters, Thu, p.m., FC Chong Diaz G. Print Only: Astrobiology Cooke M. L. Mars Geophysics and Tectonics, Tue, p.m., Salon C Chong Diaz G. Astrobiology: New Detectives, Fri, a.m., Salon A CooksR. G. Mars Instruments Posters, Thu, p.m., FC Christensen P. Mars Geomorphology, Wed, p.m., Salon B Cooks R. G. Astrobiology: New Detectives, Fri, a.m., Salon A Christensen P. R. Mars Odyssey, Moo, a.m., Salon B Cooper G. W. Carbonaceous Chondrites Posters, Tue, p.m., FC Christensen P. R * Mars Odyssey, Mon, a.m., Salon B Coradini A. Asteroids and Comets, Wed, a.m., Salon C Christensen P. R. Mars Volcanism, Mon, p.m., Salon B Cord A.M. Print OnJy: Mars Christensen P. R. Mars Surface Composition, Tue, a.m., Salon B Cord A.M.* Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Christensen P. R. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Corrigan C. M. Martian Meteorites Posters, Thu, p.m., FC Christensen P. R MER 2003 Landing Sites Posters, Tue, p.m., FC Cosarinsky M. * Carbonaceous Chondrites, Tue, a.m., Marina Plaza Christensen P. R. Mars Odyssey Posters, Tue, p.m., FC Costard F. Mars Bipolar Syndrome Posters, Thu, p.m., FC Christensen P.R. Red Hot Lava Posters, Tue, p.m., FC Craddock R. A.* Mars Wet and Wild, Thu, a.m., Salon B Christensen P.R. Mars Surface Posters, Tue, p.m., FC Craddock R. A. Mars Wet and Wild Posters, Thu, p.m., FC Christensen P. R. Mars Atmosphere Posters, Tue, p.m., FC Craddock R. A. Mars Geology, Fri, a.m., Salon B Christensen P. R. Mars Wet and Wild, Thu, a.m., Salon B Crane A. N. Mars Impacts Posters, Thu, p.m., FC Christensen P. R. Education and Public Outreach Posters, Thu, p.m., FC Crawford I. A. Print Only: Moon Christie I. Mars Instruments Posters, Thu, p.m., FC Cremers D. A. Print OnJy: Mars Churyumov K. I. Print OnJy: Small Bodies Cremers D. A. Mars Instruments Posters, Thu, p.m., FC ChutjianA. Mars Instruments Posters, Thu, p.m., FC Cremers D. A. Future Mars and Asteroid Missions, Fri, a.m., Salon C Chyba C. F. Astrobiology: New Detectives, Fri, a.m., Salon A Cressey G. Carbonaceous Chondrites Posters, Tue, p.m., FC Ciccolella S. M. Mars Surface Posters, Tue, p.m., FC Crichton D. Print OnJy: Data Distribution Cichy B. Missions and Instruments Posters, Thu, p.m., FC Crichton D. Maps 'n Bits Posters, Tue, p.m., FC Ciesla F. J.* The Wrath of Khandrules, Mon, a.m., Marina Plaza Crisp J. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Ciesla F. J. Chondrules Posters, Tue, p.m., FC Croat T. K. Presolar Grains, Thu, p.m., Marina Plaza CinaS.E. Poking Holes Posters, Tue, p.m., FC CroatT. K.* Presolar Grains, Thu, p.m., Marina Plaza CintalaM. Asteroids and Comets Posters, Thu, p.m., FC Crombie M. K. Mars Odyssey Posters, Tue, p.m., FC Cintala M. J. Print Only: Meteorites Crown D. A. Mars Volcanism, Mon, p.m., Salon B Cintala M. J. Digging Deeper Posters, Tue, p.m., FC Crown D. A. Mars Geologic Mapping Posters, Tue, p.m., FC Ciofini I. Carbonaceous Chondrites Posters, Tue, p.m., FC Crown D. A. Cold and Windy on Mars, Wed, a.m., Salon B Claeys P. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Crown D. A. Mars Geomorphology Posters, Thu, p.m., FC Claeys P. Poking Holes Posters, Tue, p.m., FC Crown D. A.* Mars Geology, Fri, a.m., Salon B Clark B. C. Mars Missions Posters, Thu, p.m., FC Crozaz G. Martian Meteorites, Wed, a.m., Marina Plaza Clark B. C. Future Mars and Asteroid Missions, Fri, a.m., Salon C Crumpler L. S. Water on Mars Posters, Thu, p.m., FC Clark B. C.* Future Mars and Asteroid Missions, Fri, a.m., Salon C Cucinotta F. Print OnJy: Mars Odyssey Clark B. E. Asteroids and Comets, Wed, a.m., Salon C Cucinotta F. Mars Odyssey, Mon, a.m., Salon B Clark P. E. Asteroids and Comets Posters, Thu, p.m., FC Cucinotta F. Mars Odyssey Posters, Tue, p.m., FC Clark P. E. Missions and Instruments Posters, Thu, p.m., FC Cucinotta F. A. Mars Odyssey, Mon, a.m., Salon B Clarke J.* Mars Wet and Wild, Thu, a.m., Salon B Cudnik B. M. Print Only: Moon Clarke T. L* Origins of Planetary Systems, Thu, a.m., Salon C CudnikB. M. Poking Holes Posters, Tue, p.m., FC Clayton D. D. Nucleosynthesis, Mon, p.m., Marina Plaza CukM. Print Only: Education Clayton D. D.* Presolar Grains, Thu, p.m., Marina Plaza CullS. C. Print Only: Mars Clayton R.N. Print Only: Meteorites CurtisS. A. Missions and Instruments Posters, Thu, p.m., FC Clayton R. N. Carbonaceous Chondrites Posters, Tue, p.m., FC Cuzzi J. N.* CA!s, Fri, a.m., Marina Plaza

156 34th LPSC Program Index Czlapinski J. Ordinary Chondrites, Thu, p.m., Salon A Dissly R. Future Mars and Asteroid Missions, Fri, a.m., Salon C Dahlberg E. D. Astrobiology: New Detectives, Fri, a.m., Salon A DisslyR. W. Astrobiology Posters, Thu, p.m., FC DaiZ. R.* IDPs: Comets and Asteroids, Wed, p.m., Salon A Dixon E. T. Ordinary Chondrites Posters, Thu, p.m., FC Daisaka H. Print Only: Origins Dobrovolskis A. R. CAis, Fri, a.m., Marina Plaza Daisaka H. Origins of Planetary Systems Posters, Thu, p.m., FC Dogadkin N. N. Print Only: Moon Dalton J. B.* Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Doggett T. Missions and Instruments Posters, Thu, p.m., FC Dalton J. B. Outer Body Experiences Posters, Tue, p.m., FC Doggett T. C. Print Only: Mars DaltonJ. B. Mars Instruments Posters, Thu, p.m., FC DohmJ. Print Only: Mars Darrach M. R. Mars Instruments Posters, Thu, p.m., FC DohmJ. Missions and Instruments Posters, Thu, p.m., FC Dauphas N.* Nucleosyntbesis, Mon, p.m., Marina Plaza DohmJ. M. Mars Geophysics and Tectonics, Tue, p.m., Salon C Dauphas N. Terrestrial Planets Posters, Thu, p.m., FC DohmJ. M* Mars Wet and Wild, Thu, a.m., Salon B Davies A. G. Print Only: Mars DohmJ.M. Recent Water on Mars, Thu, p.m., Salon B Davies A. G. Outer Body Experiences Posters, Tue, p.m., FC DohmJ.M. Missions and Instruments Posters, Thu, p.m., FC Davies A. G. lo and Beyond, Wed, a.m., Salon A Dornanik K. Evolution of the Early Earth, Thu, p.m., Salon C Davies A. G.* Io and Beyond, Wed, a.m., Salon A Dornanik K. J. Achondrites Posters, Thu, p.m., FC Davies A. G. Missions and Instruments Posters, Thu, p.m., FC Dombard A. J. Mars Geophysics and Tectonics, Tue, p.m., Salon C Davis A.M. Nucleosynthesis, Mon, p.m., Marina Plaza Dominguez G. Interplanetary Dust Posters, Thu, p.m., FC Davis A.M. Basaltic Achondrites, Thu, a.m., Marina Plaza Dominguez G. IDPs: Comets and Asteroids, Wed, p.m., Salon A Davis A.M. Presolar Grains, Thu, p.m., Marina Plaza Dominguez G. Interplanetary Dust Posters, Thu, p.m., FC Davis A. M* Presolar Grains, Thu, p.m., Marina Plaza Dominguez I. Presolar Grains, Thu, p.m., Marina Plaza Davis A.M. CAis, Fri, a.m., Marina Plaza Dones L. Moving and Grooving Ice, Tue, a.m., Salon A Davis C. K. Print Only: Data Distribution Dors E. E. Missions and Instruments, Thu, a.m., Salon A Davis S.D. Water on Mars Posters, Thu, p.m., FC DragoiD. Carbonaceous Chondrites Posters, Tue, p.m., FC Davis S. S. CAis, Fri, a.m., Marina Plaza Drake D. Mars Odyssey, Mon, a.m., Salon B Daydou Y. Print Only: Mars Drake D. Mars Odyssey Posters, Tue, p.m., FC Daydou Y. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Drake D. M. Mars Odyssey Posters, Tue, p.m., FC Daydou Y. Lunar Remote Sensing Posters, Thu, p.m., FC Drake M. J.* Evolution of the Early Earth, Thu, p.m., Salon C Daymond M. R. Rocks Made to Order Posters, Tue, p.m., FC Drake M. J. Achondrites Posters, Thu, p.m., FC D-CIXS Team Lunar Remote Sensing Posters, Thu, p.m., FC Drakopoulos M. Poking Holes, Mon, a.m., Salon C De CarliP. S. Ordinary Chondrites, Thu, p.m., Salon A Draper D. Lunar Basalts, Mon, a.m., Salon A De Gregorio B. T. * Astrobiology: New Detectives, Fri, a.m., Salon A Draper D. S. Evolution of the Martian Interior, Wed, p.m., Salon C DeHonR. A. Print Only: Mars Draper D. S. Martian Meteorites Posters, Thu, p.m., FC DeHonR. A.* Mars Wet and Wild, Thu, a.m., Salon B Dreibus G.* Martian Meteorites, Wed, a.m., Marina Plaza De HonR. A. Mars Geommphology Posters, Thu, p.m., FC Dreibus G. Martian Meteorites Posters, Thu, p.m., FC de Pablo M. A. Print Only: Education Dressler B. 0* Chicxulub Scientifc Drilling, Moo, p.m., Salon C de Pablo M. A. Print Only: Mars Dressler B. O. Poking Holes Posters, Tue, p.m., FC de Pablo M. A. Mars Wet and Wild, Thu, a.m., Salon B Drief A. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B de Pablo M. A. Print Only: Education Dubessy J. Mars Instruments Posters, Thu, p.m., FC De Saoctis M. C. Asteroids and Comets, Wed, a.m., Salon C Dubessy J. Future Mars and Asteroid Missions, Fri, a.m., Salon C de Silva S. L. Print Only: Mars Dubrovinsky L. S. Poking Holes, Mon, a.m., Salon C Deal K. S. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B DudichE. Print Only: Education Deardorff D. G. Maps 'n Bits Posters, Tue, p.m., FC DukeM. SPA Sample Return, Mon, a.m., Salon A DeCarli P. Print Only: Meteorites DukeM. B.* SPA Sample Return, Mon. a.m., Salon A Decoste D. Missions and Instruments Posters, Thu, p.m., FC Dunin-Borkowski R. E. Astrobiology: New Detectives, Fri, a.m., Salon A DeHartJ. M. Meteoritic Potpourri Posters, Tue, p.m., FC DunkinS. K. Print Only: Moon Delacourt C. Maps 'n Bits Posters, Tue, p.m., FC Dunkin S. K. Lunar Remote Sensing Posters, Thu, p.m., FC Delaney J. S* Space Weather, Mon, p.m., Salon A Dupeyrat L. Mars Bipolar Syndrome Posters, Thu, p.m., FC Delaney J. S. Evolution of the Martian Interior, Wed, p.m., Salon C Duprat J. Print Only: Astrobiology Delaney J. S. Martian Meteorites Posters, Thu, p.m., FC Duprat J. IDPs: Comets and Asteroids, Wed, p.m., Salon A DelanoJ. W. Lunar Science, Tue, p.m., Salon A Duprat J. Interplanetary Dust Posters, Thu, p.m. FC DelinK. A. Astrobiology Posters, Thu, p.m., FC DurdaD. D. Digging Deeper, Tue, a.m., Salon C Dellenback S. W. Mars Impacts Posters, Thu, p.m., FC DurdaD. D. Digging Deeper Posters, Tue, p.m., FC Demergasso C. Print Only: Astrobiology DurdaD. D* Asteroids and Comets, Wed, a.m., Salon C Demergasso C. Astrobiology: New Detectives, Fri, a.m., Salon A DurdaD. D. Asteroids and Comets Posters, -Thu, p.m., FC Demidova S. I. Moon and Mercury Posters, Tue, p.m., FC Dussault M. E. E!PO Demonstrations, Sun, p.m., LPI Demura H. Lunar Remote Sensing Posters, Thu, p.m., FC d'Uston C. Mars Odyssey Posters, Tue, p.m., FC DemykA. Interplanetary Dust Posters, Thu, p.m., FC Duxbury T. Lunar Remote Sensing Posters, Thu, p.m., FC DeRemer L. C. Outer Body Experiences Posters, Tue, p.m., FC Duxbury T. C. Maps 'n Bits Posters, Tue, p.m., FC Derenne S.* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Dwarzski R. E. Rocks Made to Order Posters, Tue, p.m, FC Derenne S. Carbonaceous Chondrites Posters, Tue, p.m., FC Dworkin J. Carbonaceous Chondrites Posters, Tue, p.m., FC Derenne S. Astrobiology: New Detectives, Fri, a.m., Salon A DyarM. D. Print Only: Meteorites Desai S. Io and Beyond, Wed, a.m., Salon A DyarM.D. Space Weather, Mon. p.m. Salon A Desch S. J.* CAis, Fri, a.m., Marina Plaza DyarM.D. Mars 2003 Rover/Spectral Studies, Tue, p.m, Salon B Dettman D. Chicxulub Scientifc Drilling, Moo, p.m., Salon C DyarM. D.* Mars 2003 Rover/Spectral Studies, Tue, p.m, Salon B Deutsch A. Print Only: Chicxulub DyarM.D. Evolution of the Martian Interior, Wed, p.m., Salon C deVore E. Print Only: Astrobiology DyarM.D. Martian Meteorites Posters, Thu, p.m., FC deVore E. Astrobiology: New Detectives, Fri, a.m., Salon A DyarM.D. Future Mars and Asteroid Missions, Fri, a.m., Salon C d'Hendecourt L. Interplanetary Dust Posters, Thu, p.m., FC Dykman C. A. Print Only: Data Distribution Di Lorenzo S. Mars Missions Posters, Thu, p.m., FC DymekR. F. Evolution of the Early Earth, Thu, p.m. Salon C Diaz-Martinez E. Poking Holes Posters, Tue, p.m., FC Dypvik H. Digging Deeper Posters, Tue, p.m, FC Dichko I. A. Print Only: Mars EbeiD. S.* Tbe Wrath of Khandrules, Mon. a.m, Marina Plaza Dickey J. O. Lunar Geophysics Posters, Thu, p.m., FC EbelD. S. Carbonaceous Chondrites, Tue, a.m, Marina Plaza Dickson J. L. Mars Geomorphology Posters, Thu, p.m., FC EbelD. S. Chondrules Posters, Tue, p.m, FC DikovYu. P. Space Weather, Mon, p.m., Salon A Eberhardy C. A.* Digging Deeper, Tue, a.m. Salon C DiMaggio E. N. MER 2003 Landing Sites Posters, Tue, p.m., FC EbiharaM. Basaltic Achondrites, Thu, a.m, Marina Plaza Dingizian A. Future Mars and Asteroid Missions, Fri, a.m., Salon C EbiharaM. Achondrites Posters, Thu, p.m, FC Diniega S.* Cold and Windy on Mars, Wed, a.m., Salon B Eddlemon E. Cold and Windy on Mars, Wed, a.m, Salon B Dinwiddie C. L. * Mars Wet and Wild, Thu, a.m., Salon B Edgett K. S. Water on Mars Posters, Thu, p.m., FC Dissly R. Lunar Remote Sensing Posters, Thu, p.m., FC Edgett K. S.* Mars Geology, Fri, a.m., Salon B Dissly R. Missions and Instruments Posters, Thu, p.m., FC Edmonds J. L. Mars Surface Posters, Tue, p.m, FC

34th LPSC Program Index ------157 Edmunson J. E. Martian Meteorites, Wed, a.m., Marina Plaza Fergason R. L. Mars Odyssey Posters, Tue, p.m., FC Edwards K. D. Lunar Remote Sensing Posters, Tbu, p.m., FC Ferguson F. T. Nucleosynthesis, Mon, p.m., Marina Plaza Edwards W. N. Poking Holes Posters, Tue, p.m., FC Fernandez Y. R. Asteroids and Comets, Wed, a.m., Salon C Ehrenfreund P. Mars Geology, Fri, a.m., Salon B Ferre P. A. Print Only: Mars Eichhorn F. Rocks Made to Order Posters, Tue, p.m., FC Ferrill D. A. Print Only: Mars Eichhorn G. Maps 'n Bits Posters, Tue, p.m., FC Ferrill D. A. Mars Tectonics/Geophysics Posters, Tue, p.m., FC EilerJ. M* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Ferris J. C. Mars Wet and Wild, Thu, a.m., Salon B E!EidM. F. Nucleosynthesis, Mon, p.m., Marina Plaza Ferris J. C. Recent Water on Mars, Thu, p.m., Salon B El Goresy A* Poking Holes, Mon, a.m., Salon C Ferris M. J. Mars Instruments Posters, Tbu, p.m., FC El Goresy A. Nucleosynthesis, Mon, p.m., Marina Plaza FeserM. Interplanetary Dust Posters, Tbu, p.m., FC El Goresy A. Martian Meteorites Posters, Thu, p.m., FC Fialips C.-I. Mars Geology, Fri, a.m., Salon B Eliason E. M. Moon and Mercury Posters, Tue, p.m., FC Fiche! P. Mars Instruments Posters, Thu, p.m., FC Eliason E. M. Lunar Remote Sensing Posters, Tbu, p.m., FC Fichet P. Future Mars and Asteroid Missions, Fri, a.m., Salon C Elkins-Tanton L. T. Moon and Mercury Posters, Tue, p.m., FC Figueredo P. H.* Moving and Grooving Ice, Tue, a.m., Salon A Elkins-Tanton L. T. * Evolution of the Martian Interior, Wed, p.m., Salon C Figueredo P. H. Education and Public Outreach Posters, Thu, p.m., FC Elphic R. C. SPA Sample Retorn, Mon, a.m., Salon A FikeD. A. Print Only: Astrobiology Elphic R. C. Mars Odyssey Posters, Tue, p.m., FC FikeD. A. Astrobiology: New Detectives, Fri, a.m., Salon A Elphic R. C. Lunar Remote Sensing Posters, Tbu, p.m., FC Filonenko V. S. Print Only: Small Bodies Elphic R. C. Mars Instruments Posters, Tbu, p.m., FC Fink D. Ordinary Chondrites Posters, Tbu, p.m., FC Engel H. P. Achondrites Posters, Tbu, p.m., FC Finkel R. C. Ordinary Chondrites Posters, Tbu, p.m., FC Engler A. The Wrath of Khandrules, Mon, a.m., Marina Plaza Finnegan D. Mars Bipolar Syndrome Posters, Tbu, p.m., FC Engler A.* The Wrath ofKhandrules, Mon, a.m., Marina Plaza Fischer T. P IDPs: Comets and Asteroids, Wed, p.m., Salon A Engrand C. IDPs: Comets and Asteroids, Wed, p.m., Salon A Fisenko A. V. Print Only: Meteorites Engrand C.* IDPs: Comets and Asteroids, Wed, p.m., Salon A Fisenko A. V. Print Only: Small Bodies Engrand C. Interplanetary Dust Posters, Thu, p.m., FC Fishbaugh K. E. Mars Bipolar Syndrome Posters, Thu, p.m., FC EnkeB. Mars Impacts Posters, Tbu, p.m., FC Fittipaldo M. M.* Basaltic Achondrites, Thu, a.m., Marina Plaza Enke B. L. Asteroids and Comets, Wed, a.m., Salon C Flood B. Astrobiology: New Detectives, Fri, a.m., Salon A Enos H. L. E!PO Demonstrations, Sun, p.m., LPI Flood B. E. Astrobiology Posters, Thu, p.m., FC Erard S. Mars Surface Composition, Tue, a.m., Salon B FlorE. L Moon and Mercury Posters, Tue, p.m., FC Erard S. Mars Surface Posters, Tue, p.m., FC Florian P. Carbonaceous Chondrites, Tue, p.m, Marina Plaza Erjomenko G. K. Print Only: Impacts Floss C. The Wrath of Khandrules, Mon, a.m., Marina Plaza ErnstC.M.* Digging Deeper, Tue, a.m., Salon C Floss C. Moon and Mercury Posters, Tue, p.m., FC ErnstR. E. Meteoritic Potpourri Posters, Tue, p.m., FC Floss C. IDPs: Comets and Asteroids, Wed, p.m., Salon A Ernst R. E. Venus Posters, Tbu, p.m., FC Floss C.* IDPs: Comets and Asteroids, Wed, p.m., Salon A Erzinger J. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Flynn G. IDPs: Comets and Asteroids, Wed, p.m., Salon A Erzinger J. Poking Holes Posters, Tue, p.m., FC Flynn G. J. Digging Deeper, Tue, a.m, Salon C Escudero L. Print Only: Astrobiology Flynn G. J. Digging Deeper Posters, Tue, p.m, FC Escudero L. Astrobiology: New Detectives, Fri, a.m., Salon A Flynn G. J. Carbonaceous Chondrites Posters, Tue, p.m., FC Estrada P. R. * Origins of Planetary Systems, Tbu, a.m., Salon C Flynn G. J. IDPs: Comets and Asteroids, Wed, p.m., Salon A Estrada P. R. Origins of Planetary Systems Posters, Thu, p.m., FC Flynn G. J* IDPs: Comets and Asteroids, Wed, p.m., Salon A Eugster O. Terrestrial Planets Posters, Tbu, p.m., FC Flynn G. J. Interplanetary Dust Posters, Tbu, p.m., FC Evans L. Mars Odyssey, Mon, a.m., Salon B Foge!M. Astrobiology: New Detectives, Fri, a.m., Salon A Evans L. G. Mars Odyssey, Mon, a.m., Salon B Foing B. H. Mars Geology, Fri, a.m., Salon B Evans L. G. Mars Odyssey Posters, Tue, p.m., FC FoldiT. Print Only: Education Ewald S. P. Cold and Windy on Mars, Wed, a.m., Salon B Foley C. N.* Evolution of the Martian Interior, Wed, p.m., Salon C Fabre C. Mars Instruments Posters, Thu, p.m., FC Foley C. N. Basaltic Achondrites, Thu, a.m., Marina Plaza Fabre C. Future Mars and Asteroid Missions, Fri, a.m., Salon C Foos M. Education and Public Outreach Posters, Tbu, p.m., FC Fabre J. Print Only: Impacts Forbes J. Mars Odyssey, Mon, a.m., Salon B Fabregat J. Print Only: Small Bodies Ford R. Terrestrial Planets Posters, Tbu, p.m., FC Fabriczy A. Print Only: Education Forget F. Mars Odyssey, Mon, a.m., Salon B Fabriczy A. E!PO Demonstrations, Sun, p.m., LPI Forney L. Future Mars and Asteroid Missions, Fri, a.m., Salon C Faestermann T. Ordinary Chondrites Posters, Thu, p.m., FC Forsberg-Taylor N. K. Mars Impacts Posters, Tbu, p.m., FC Faestermann Tb. CA!s Posters, Tbu, p.m., FC Fortezzo C. Mars Wet and Wild Posters, Tbu, p.m., FC Fagan T. J. CA!s Posters, Thu, p.m., FC Fouchet T. Print Only: Outer Planets Fagents S. A. Red Hot Lava Posters, Tue, p.m., FC Franchi I. A.* Ordinary Chondrites, Tbu, p.m., Salon A Farren A. G. Print Only: Mars FrankM. R. Terrestrial Planets Posters, Tbu, p.m., FC Fairen A. G. Outer Body Experiences Posters, Tue, p.m., FC FrankeL. Ordinary Chondrites, Thu, p.m., Salon A Farren A. G. Mars Wet and Wild, Tbu, a.m., Salon B Frankel R. B. Astrobiology: New Detectives, Fri, a.m., Salon A Faleide J. I. Print Only: Impacts Franklin B. Venus, Tbu, a.m., Salon A Farmer J. Mars Surface Posters, Tue, p.m., FC Franklin N. M. Print Only: Mars Farnham T. L. Asteroids and Comets, Wed, am, Salon C FranzenM. Ordinary Chondrites, Tbu, p.m., Salon A Farquhar J. Astrobiology Posters, Tbu, p.m., FC Franzen M. A. Print Only: Missions and Instruments Farrand W. H.* Mars 2003 Rover/Spectral Stodies, Tue, p.m., Salon B Freeman J. J. Mars Instruments Posters, Tbu, p.m., FC Farrand W. H. Mars Surface Posters, Tue, p.m., FC French B. M. Poking Holes Posters, Tue, p.m., FC Fauerbach M. Print Only: Small Bodies FrenchL M. Asteroids and Comets, Wed, am, Salon C Fauerbach M. Education and Public Outreach Posters, Thu, p.m., FC Frey E. L. Mars Geologic Mapping Posters, Tue, p.m., FC Fedkin A. V.* Origins of Planetary Systems, Thu, a.m., Salon C Frey H. V. Mars Geophysics and Tectonics, Tue, p.m., Salon C FeelyM. Astrobiology: New Detectives, Fri, a.m., Salon A Frey H. V.* Mars Geophysics and Tectonics, Tue, p.m., Salon C Fegley B. Jr. Outer Body Experiences Posters, Tue, p.m., FC Frey H. V. Mars Geologic Mapping Posters, Tue, p.m., FC FehrM.A. Meteoritic Potpourri Posters, Tue, p.m., FC Frey H. V. Mars Impacts Posters, Thu, p.m., FC FeiY* Evolution of the Martian Interior, Wed, p.m., Salon C Frey H. V. Education and Public Outreach Posters, Tbu, p.m., FC FeiY. Evolution of the Early Earth, Thu, p.m., Salon C Friedmann I. Print Only: Astrobiology FeiY. Terrestrial Planets Posters, Tbu, p.m., FC Friedmann I. Astrobiology: New Detectives, Fri, a.m., Salon A Feldman W. Mars Odyssey, Mon, a.m., Salon B Friedrich J. M* Carbonaceous Chondrites, Tue, a.m, Marina Plaza Feldman W. C. SPA Sample Retorn, Mon, a.m., Salon A Frischbutter A. Rocks Made to Order Posters, Tue, p.m. FC Feldman W. C* Mars Odyssey, Mon, a.m., Salon B Fritz J. Martian Meteorites Posters, Tbu, p.m., FC Feldman W. C. Mars Odyssey Posters, Tue, p.m., FC FuchsM. P. Education and Public Outreach Posters, Tbu, p.m., FC Feldman W. C. Asteroids and Comets, Wed, a.m., Salon C FullerM. Carbonaceous Chondrites, Tue, p.m, Marina Plaza Feldman W. C. Mars Geomorphology, Wed, p.m., Salon B FullerM. Astrobiology Posters, Thu, p.m., FC Feldman W. C. Lunar Remote Sensing Posters, Tbu, p.m., FC FullerM. D. Mars Geophysics and Tectonics, Tue, p.m., Salon C

158 34th LPSC Program Index Funs ten H. O. Mars Odyssey Posters, Tue, p.m., FC Glass B. Mars Instruments Posters, Thu, p.m., FC Furuya I. Print Only: Origins Glass B. P. Poking Holes Posters, Tue, p.m., FC Gaddis L. Mars Surface Posters, Tue, p.m., FC Glass gold A. E. Nucleosynthesis, Mon, p.m., Marina Plaza Gaddis L. Lunar Remote Sensing Posters, Thu, p.m., FC Glatz C. A. Print Only: Impacts Gaddis L. R. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Glatz C. A. Poking Holes Posters, Tue, p.m., FC Gaddis L. R. Moon and Mercury Posters, Tue, p.m., FC Glavin D. P* Ordinary Chondrites, Thu, p.m., Salon A Gaddis L. R. Mars Surface Posters, Tue, p.m., FC Glaze L. Red Hot Lava Posters, Tue, p.m., FC Gaddis L. R. Lunar Remote Sensing Posters, Thu, p.m., FC Glaze L Mars Geomorphology Posters, Thu, p.m., FC GaffeyM. J. Poking Holes Posters, Tue, p.m., FC Glaze L. S. Mars Volcanism, Mon, p.m., Salon B Gaffey M. J. Asteroids and Comets, Wed, a.m., Salon C Glaze L. S. Red Hot Lava Posters, Tue, p.m., FC Gaffey M. J* Asteroids and Comets, Wed, a.m., Salon C Glaze L. S. Venus Posters, Thu, p.m., FC Gagnepain-Beyneix J. Lunar Geophysics Posters, Thu, p.m., FC GlotchT. D. Mars Surface Composition, Tue, a.m., Salon B GakinR. Education and Public Outreach Posters, Thu, p.m., FC Glotch T. D* Mars Surface Composition, Tue, a.m., Salon B Galindo C. Print Only: Astrobiology Glotch T. D. Mars Odyssey Posters, Tue, p.m., FC GallinoR. Presolar Grains, Thu, p.m., Marina Plaza Gndsey R. Ordinary Chondrites, Thu, p.m., Salon A Galuszka D. MER 2003 Landing Sites Posters, Tue, p.m., FC Golden D. C. Mars Alteration Posters, Tue, p.m., FC Ganguly J. Rocks Made to Order Posters, Tue, p.m., FC Golden D. C. Mars Terrestial Analogs Posters, Thu, p.m., FC GantiT. Astrobiology Posters, Thu, p.m., FC Golden D. C. Martian Meteorites Posters, Thu, p.m., FC Garbeil H. Mars Wet and Wild, Thu, a.m., Salon B Golden D. C. Astrobiology: New Detectives, Fri, a.m., Salon A Garbeil H. Mars Impacts Posters, Thu, p.m., FC Goldstein D. B. Outer Body Experiences Posters, Tue, p.m., FC Gardner K. Carbonaceous Chondrites Posters, Tue, p.m., FC Goldstein J. I. Achondrites, Wed, p.m., Marina Plaza Garrison D. Achondrites Posters, Thu, p.m., FC Golombek M. * Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Garrison D. H. Basaltic Achondrites, Thu, a.m., Marina Plaza Golombek M. P. Mars Geophysics and Tectonics, Tue, p.m., Salon C Garvie L. A. J. * Carbonaceous Chondrites, Tue, a.m., Marina Plaza Golombek M. P. MER 2003 Landing Sites Posters, Tue, p.m., FC Garvie L. A. J. Carbonaceous Chondrites Posters, Tue, p.m., FC Golombek M. P. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Garvin J. B. Mars Wet and Wild, Thu, a.m., Salon B Golombek M. P. Mars Geology, Fri, a.m., Salon B Gasnaul O. SPA Sample Return, Mon, a.m., Salon A Golubeva L. F. Print Only: Small Bodies Gasnault O. Mars Odyssey, Mon, a.m., Salon B Gomez Hernandez C. Mars Geology, Fri, a.m., Salon B Gasnault O. Mars Odyssey Posters, Tue, p.m., FC Gomez-Elvira J. Astrobiology Posters, Thu, p.m., FC Gasnault O. Lunar Remote Sensing Posters, Thu, p.m., FC Goodman]. C.* Moving and Grooving Ice, Tue, a.m., Salon A GatineauD. Print Only: Mars Goodman J. C. Outer Body Experiences Posters, Tue, p.m., FC GatineauD. Mars Geomorphology Posters, Thu, p.m., FC Goodrich C. A. The Wrath of Khandrules, Mon, a.m., Marina Plaza Gazis P. Mars Missions Posters, Thu, p.m., FC Goodrich C. A.* Martian Meteorites, Wed, a.m., Marina Plaza Gchachu K. Education and Public Outreach Posters, Thu, p.m., FC Goodrich C. A. Achondrites, Wed, p.m., Marina Plaza Geissler P. Moving and Grooving Ice, Tue, a.m., Salon A Goodrich C. A. Martian Meteorites Posters, Thu, p.m., FC Geissler P. Outer Body Experiences Posters, Tue, p.m., FC Gordon H. Mars Geomorphology, Wed, p.m., Salon B Geissler P. E* Io and Beyond, Wed, a.m., Salon A Gordon H. Education and Public Outreach Posters, Thu, p.m., FC Geissler P. E. Missions and Instruments Posters, Thu, p.m., FC Gorelick N. S. Mars Odyssey Posters, Tue, p.m., FC Gelinas A. Chicxulub Posters, Tue, p.m., FC Goreva J. S* Evolution of the Martian Interior, Wed, p.m., Salon C Genda H* Evolution of the Early Earth, Thu, p.m., Salon C Gosling J. T. Missions and Instruments, Thu, a.m., Salon A GendrinA.* Mars Surface Composition, Tue, a.m., Salon B Goswami J. N. Nucleosynthesis, Mon, p.m., Marina Plaza Gendrin A. Mars Surface Posters, Tue, p.m., FC Goto K. Chicxulub Posters, Tue, p.m., FC GengeM. J* IDPs: Comets and Asteroids, Wed, p.m., Salon A Goudy C. L.* Mars Geophysics and Tectonics, Tue, p.m., Salon C George J. Astrobiology Posters, Thu, p.m., FC GouldR. R. E!PO Demonstrations, Sun, p.m., LPI Gerasimov M. V* Space Weather, Mon, p.m., Salon A GounelleM.* Nucleosynthesis, Mon, p.m., Marina Plaza Gerasimov M. V. Astrobiology Posters, Thu, p.m., FC GounelleM. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Gersten M. F. Cold and Windy on Mars, Wed, a.m., Salon B GounelleM. Carbonaceous Chondrites Posters, Tue, p.m., FC Gesztesi A. Astrobiology Posters, Thu, p.m., FC GounelleM. Chondrules Posters, Tue, p.m., FC Ghail R. C.* Mars Geomorphology, Wed, p.m., Salon B GounelleM. IDPs: Comets and Asteroids, Wed, p.m., Salon A Ghambaja J. Rocks Made to Order Posters, Tue, p.m., FC GounelleM. Interplanetary Dust Posters, Thu, p.m., FC Ghatan G. J. * Mars Geomorphology, Wed, p.m., Salon B GounelleM. CA!s, Fri, a.m., Marina Plaza GhentR. R. Mars Wet and Wild Posters, Thu, p.m., FC Gourier D. Carbonaceous Chondrites Posters, Tue, p.m., FC Ghosh A. Mars 2003 Rover/Spectral Studies, Tne, p.m., Salon B Gourier D. Astrobiology: New Detectives, Fri, a.m., Salon A Ghosh A.* Evolution of the Martian Interior, Wed, p.m., Salon C GradyM. M. Carbonaceous Chondrites Posters, Tue, p.m., FC Gibson E. K. * Mars Geology, Fri, a.m., Salon B GradyM.M. Martian Meteorites Posters, Thu, p.m., FC Gibson E. K. Jr. Mars Terrestial Analogs Posters, Thu, p.m., FC GradyM. M. Astrobiology Posters, Thu, p.m., FC Gibson E. K. Jr. Astrobiology: New Detectives, Fri, a.m., Salon A GraffT. G. Print Only: Mars Gibson L. Mars Instruments Posters, Thu, p.m., FC GraffT. G. Mars Surface Composition, Tue, a.m., Salon B Gibson R. L. Poking Holes, Mon, a.m., Salon C GraffT. G. Mars Surface Posters, Tue, p.m., FC Gibson R. L. Chicxulub Scientifc Drilling, Mon. p.m., Salon C Graham G. A. Missions and Instruments, Thu, a.m., Salon A Gibson R. L. Poking Holes Posters, Tue, p.m., FC GrandeM. Lunar Remote Sensing Posters, Thu, p.m., FC Giese B. Moving and Grooving Ice, Tue, a.m., Salon A Granovsky L. B. Print Only: Meteorites Giese B. Outer Body Experiences Posters, Tue, p.m., FC Grant C. S. Maps 'n Bits Posters, Tue, p.m., FC Giguere T. A. Lunar Science, Tue, p.m., Salon A Grant J. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B GilletPj. Poking Holes, Mon, a.m., Salon C Grant J. A. Mars Wet and Wild Posters, Thu, p.m., FC Gillies D. C. Achondrites Posters, Thu, p.m., FC Graup G. Poking Holes, Mon, a.m., Salon C GillisJ. J. SPA Sample Return, Mon, a.m., Salon A Greeley R. Print Only: Mars Gillis J. J.* SPA Sample Return, Mon, a.m., Salon A Greeley R. Moving and Grooving Ice, Tue, a.m., Salon A Gillis J. J. Lunar Science, Tue, p.m., Salon A Greeley R. Red Hot Lava Posters, Tue, p.m., FC GillisJ. J. Moon and Mercury Posters, Tue, p.m., FC Greeley R. Io and Beyond, Wed, a.m., Salon A Gillis J. J. Lunar Remote Sensing Posters, Thu, p.m., FC Greeley R. Cold and Windy on Mars, Wed, a.m., Salon B Gillis J. J. Mars Instruments Posters, Thu, p.m., FC Greeley R. Mars Wet and Wild Posters, Thu, p.m., FC Gillis J. J. Astrobiology Posters, Thu, p.m., FC Greeley R. Mars Aeolian Processes Posters, Thu, p.m., FC Gilmore M. S. Print Only: Mars Greeley R. Education and Public Outreach Posters, Thu, p.m., FC Gilmour!.* Chicxulub Scientifc Drilling, Mon, p.m., Salon C Greeley R. Missions and Instruments Posters, Thu, p.m., FC Gilmour!. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Greeley R. Future Mars and Asteroid Missions, Fri, a.m., Salon C Gimesi L. Print Only: Education GreenO.R. Astrobiology: New Detectives, Fri, a.m., Salon A Gladman B. Asteroids and Comets Posters, Thu, p.m., FC Green T. J. Education and Public Outreach Posters, Thu, p.m., FC Gladstone G. R. Print Only: Outer Planets Greenberg R. Print Only: Small Bodies Glamoclija M. Astrobiology Posters, Thu, p.m., FC Greenberg R. Moving and Grooving Ice, Tue, a.m., Salon A

34th LPSC Program Index------159 Greenberg R. * Moving and Grooving Ice, Tue, a.m., Salon A Hamilton V. E. Mars Surface Composition, Tue, a.m., Salon B Greenberg R. Digging Deeper, Tue, a.m., Salon C Hamilton V. E. Mars Surface Posters, Tue, p.m., FC Greenhagen B. T* Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Hamilton V. E. Mars Instruments Posters, Thu, p.m., FC Greenham J. C. Cold and Windy on Mars, Wed, a.m., Salon B Hammer C. Interplanetary Dust Posters, Thu, p.m., FC Gregg T. K. lo and Beyond, Wed, a.m., Salon A HammerJ. E. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Gregg T. K. P. Mars Volcanism, Mon, p.m., Salon B HammerP. Mars Instruments Posters, Thu, p.m., FC Greshake A. Print Only: Meteorites Han L. Moving and Grooving Ice, Tue, a.m., Salon A Greshake A. Carbonaceous Chondrites Posters, Tue, p.m., FC Han S.-C. Lunar Geophysics Posters, Thu, p.m., FC Greshake A. Martian Meteorites Posters, Thu, p.m., FC Hanna J. C* Mars Wet and Wild, Thu, a.m., Salon B Grier J. A. E/PO Demonstrations, Sun, p.m., LPI Hansen C. J. Mars Instruments Posters, Thu, p.m., FC Griffiths A. D.* Future Mars and Asteroid Missions, Fri, a.m., Salon C Hansen G. B. Moving and Grooving Ice, Tue, a.m., Salon A Gri gorszky I. Print Only: Astrobiology Hansen V. L. Print Only: Venus Grigorszky I. Astrobiology: New Detectives, Fri, a.m., Salon A Hansen V. L* Venus, Thu, a.m., Salon A Grigsby B. H. Print Only: Astrobiology Hansen V. L. Venus Posters, Thu, p.m., FC Grigsby B. H. Astrobiology: New Detectives, Fri, a.m., Salon A Hapke B. W. Mars Surface Posters, Tue, p.m., FC GrimmR. E. Mars Geomorphology, Wed, p.m., Salon B Hapke B. W. Lunar Remote Sensing Posters, Thu, p.m., FC GrimmR. E* Mars Wet and Wild, Thu, a.m., Salon B Harazono K. * CAis, Fri, a.m., Marina Plaza Grin E. A. Print Only: Astrobiology Hardersen P. S. Asteroids and Comets, Wed, a.m., Salon C GrinE. A. Astrobiology: New Detectives, Fri, a.m., Salon A Hardersen P. S * Asteroids and Comets, Wed, a.m., Salon C Groneman K. Print Only: Data Distribution Hare T. Mars Geophysics and Tectonics, Tue, p.m., Salon C Groop E. E. Mars Instruments Posters, Thu, p.m., FC Hare T. MER 2003 Landing Sites Posters, Tue, p.m., FC GrosN. Maps 'n Bits Posters, Tue, p.m., FC Hare T. M. Print Only: Mars Grosfils E. B. Print Only: Mars Hare T. M. Maps 'n Bits Posters, Tue, p.m., FC Grosfils E. B. Venus Posters, Thu, p.m., FC HareT. M. Mars Geomorphology, Wed, p.m., Salon B Grossman J. N. * The Wrath of Khandrules, Mon, a.m., Marina Plaza Hare T. M. Education and Public Outreach Posters, Thu, p.m., FC Grossman J. N. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Hargitai H. EIPO Demonstrations, Sun, p.m., LPI Grossman L. Origins of Planetary Systems, Thu, a.m., Salon C Hargitai H. Outer Body Experiences Posters, Tue, p.m., FC Grossman L. CAis, Fri, a.m., Marina Plaza Hargitai H. Education and Public Outreach Posters, Thu, p.m., FC Grove T. L. Print Only: Meteorites Harris A. W. Asteroids and Comets Posters, Thu, p.m., FC Grove T. L. Mars Surface Composition, Tue, a.m., Salon B Harris J. C. Mars Odyssey Posters, Tue, p.m., FC Grove T. L. Moon and Mercury Posters, Tue, p.m., FC Harris J. C. Mars Wet and Wild, Thu, a.m., Salon B Grove T. L. Achondrites, Wed, p.m., Marina Plaza Harris R. S. Poking Holes Posters, Tue, p.m., FC Grubert J.P. Print Only: Origins Harrison K. H.* Mars Geomorphology, Wed, p.m., Salon B GriinE. IDPs: Comets and Asteroids, Wed, p.m., Salon A Harrison K. H. Mars Wet and Wild, Thu, a.m., Salon B Grunthaner F. J. * Mars Geology, Fri, a.m., Salon B Harshman K. P. Mars Odyssey Posters, Tue, p.m., FC GuanY. The Wrath of Khandrules, Mon, a.m., Marina Plaza HartS. Digging Deeper Posters, Tue, p.m., FC GuanY. Carbonaceous Chondrites, Tue, a.m., Marina Plaza HartS. D.* Digging Deeper, Tue, a.m., Salon C GuanY. Martian Meteorites, Wed, a.m., Marina Plaza HartS. D. Mars Missions Posters, Thu, p.m., FC Guan Y. Evolution of the Martian Interior, Wed, p.m., Salon C Harter D. Print Only: Data Distribution Guan Y. Martian Meteorites Posters, Thu, p.m., FC Hartmann D. Outer Body Experiences Posters, Tue, p.m., FC Gucsik A. Poking Holes, Mon, a.m., Salon C Hartmann W. K. Mars Geologic Mapping Posters, Tue, p.m., FC Guest J. E. Print Only: Venus Hartmann W. K. Cold and Windy on Mars, Wed, a.m., Salon B Guidry S. A. Astrobiology Posters, Thu, p.m., FC Hartmann W. K* Mars Geomorphology, Wed, p.m., Salon B GuilloisO. CAis Posters, Thu, p.m., FC Hartmann W. K. Mars Geomorphology Posters, Thu, p.m., FC Guinness E. A. Mars Odyssey Posters, Tue, p.m., FC Hartness N. Cold and Windy on Mars, Wed, a.m., Salon B Gulak Yu. K. Print Only: Mars Haruyama J. Lunar Remote Sensing Posters, Thu, p.m., FC Gulick V. C. Maps 'n Bits Posters, Tue, p.m., FC Harvey R. P. Poking Holes Posters, Tue, p.m., FC Gulick V. C. Mars Missions Posters, Thu, p.m., FC Harvey R. P. Meteoritic Potpourri Posters, Tue, p.m., FC GunterM. EIPO Demonstrations, Sun, p.m., LPI Harvey R. P. Martian Meteorites Posters, Thu, p.m., FC Guseva E. V. Print Only: Small Bodies Harvey R. P. Astrobiology Posters, Thu, p.m., FC Haack H.* Basaltic Achondrites, Thu, a.m., Marina Plaza Hasebe N. Lunar Remote Sensing Posters, Thu, p.m., FC Habicht K. S. Astrobiology Posters, Thu, p.m., FC Hasegawa S. Carbonaceous Chondrites Posters, Tue, p.m., FC Hagedorn N. L. Asteroids and Comets, Wed, a.m., Salon C Hashimoto A. CAis, Fri, a.m., Marina Plaza Hagerty J. Achondrites Posters, Thu, p.m., FC Hashimoto G. L. Venus Posters, Thu, p.m., FC Hagerty J. J. * Lunar Science, Tue, p.m., Salon A Hashimoto M. Presolar Grains, Thu, p.m., Marina Plaza Hagerty J. J. Moon and Mercury Posters, Tue, p.m., FC HaskinL. A. SPA Sample Return, Mon, a.m., Salon A Hagerty J. J. Astrobiology Posters, Thu, p.m., FC Haskin L.A.* SPA Sample Return, Mon, a.m., Salon A Haghighipour N. Origins of Planetary Systems Posters, Thu, p.m., FC HaskinL. A. Lunar Science, Tue, p.m., Salon A HahnJ. M.* Origins of Planetary Systems, Thu, a.m., Salon C HaskinL. A. Moon and Mercury Posters, Tue, p.m., FC HakeM. D. Outer Body Experiences Posters, Tue, p.m., FC HaskinL. A. Mars Instruments Posters, Thu, p.m., FC Halasz A Print Only: Education Haskin L.A. Astrobiology Posters, Thu, p.m., FC Haldemann A Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Haskin L.A. Future Mars and Asteroid Missions, Fri, a.m., Salon C Haldemann A. MER 2003 Landing Sites Posters, Tue, p.m., FC Hauber E. Print Only: Mars Haldemann A. F. C. Mars Geophysics and Tectonics, Tue, p.m., Salon C HauboldR. Martian Meteorites Posters, Thu, p.m., FC Haldemann A. F. C. Mars Missions Posters, Thu, p.m., FC Hauck S. A. II Mars Geophysics and Tectonics, Tue, p.m., Salon C Haldemann A. F. C.* Mars Geology, Fri, a.m., Salon B Hauck S. A. II* Mars Geophysics and Tectonics, Tue, p.m., Salon C Hale A. S. Mars Atmosphere Posters, Tue, p.m., FC Hawke B. R. Space Weather, Mon, p.m., Salon A Hale A. S. Lunar Remote Sensing Posters, Thu, p.m., FC Hawke B. R.* Lunar Science, Tue, p.m., Salon A Hale A. S. Mars Bipolar Syndrome Posters, Thu, p.m., FC Hawke B. R. Lunar Remote Sensing Posters, Thu, p.m., FC Halliday A. N. Lunar Science, Tue, p.m., Salon A HeadJ. N.* Martian Meteorites, Wed, a.m., Marina Plaza Halliday A. N. Meteoritic Potpourri Posters, Tue, p.m., FC HeadJ. W. Print Only: Venus Halliday A. N. Achondrites, Wed, p.m., Marina Plaza HeadJ. W. Print Only: Mars Hamano K. Digging Deeper, Tue, a.m., Salon C HeadJ. W. Moving and Grooving Ice, Tue, a.m., Salon A Hamano K* Digging Deeper, Tue, a.m., Salon C HeadJ. W. Outer Body Experiences Posters, Tue, p.m., FC HamaraD. EIPO Demonstrations, Sun, p.m., LPI HeadJ. W. Cold and Windy on Mars, Wed, a.m., Salon B HamaraD. Mars Odyssey, Mon, a.m., Salon B HeadJ. W.* Cold and Windy on Mars, Wed, a.m., Salon B HamaraD. Mars Odyssey Posters, Tue, p.m., FC HeadJ. W. Mars Geomorphology, Wed, p.m., Salon B Hamara D. K. Mars Odyssey, Mon, a.m., Salon B HeadJ. W. Mars Wet and Wild, Thu, a.m., Salon B Hamilton V. E. Mars Odyssey, Mon, a.m., Salon B HeadJ. W. Venus, Thu, a.m., Salon A Hamilton V. E.* Mars Odyssey, Mon, a.m., Salon B HeadJ. W. Venus Posters, Thu, p.m., FC

160 34th LPSC Program Index Head J. W. Mars Geomorphology Posters, Thu, p.m., FC Honda R. Lunar Remote Sensing Posters, Thu, p.m., FC HeadJ. W. Mars Bipolar Syndrome Posters, Thu, p.m., FC Hood L. L. The Wrath of Khandrules, Mon, a.m., Marina Plaza Head J. W. III SPA Sample Return, Mon, a.m., Salon A Hood L. L.* Mars Geophysics and Tectonics, Tue, p.m., Salon C Head J. W. III Mars Volcanism, Mon, p.m., Salon B Hood L. L. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Head J. W. III Mars Geophysics and Tectonics, Tue, p.m., Salon C Hood L. L. Chondrules Posters, Tue, p.m., FC Head J. W. III Moon and Mercury Posters, Tue, p.m., FC Hoogenboom T* Venus, Thu, a.m., Salon A Head J. W. III Mars Geomorphology, Wed, p.m., Salon B Hoppa G. V. Moving and Grooving Ice, Tue, a.m., Salon A Head J. W. III Mars Geomorphology Posters, Thu, p.m., FC Hoppe P. Nucleosynthesis, Mon, p.m., Marina Plaza Head J. W. III Mars Bipolar Syndrome Posters, Thu, p.m., FC Hoppe P. Presolar Grains, Thu, p.m., Marina Plaza Head J. W. III Mars Geology, Fri, a.m., Salon B Hoppe P.* Presolar Grains, Thu, p.m., Marina Plaza Heather D. J. Print Only: Moon Horan M. F. Lunar Basalts, Mon, a.m., Salon A Hecht L. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Horan M. F. Ordinary Chondrites, Thu, p.m., Salon A Hecht L. Chicxulub Posters, Tue, p.m., FC Bornemann U. Print Only: Chicxulub HechtM. H.* Recent Water on Mars, Thu, p.m., Salon B Horsfield B. Chicxulub Posters, Tue, p.m., FC HechtM. H. Mars Geomorphology Posters, Thu, p.m., FC Horton A. Mars Missions Posters, Thu, p.m., FC Heck Ph. R. Meteoritic Potpourri Posters, Tue, p.m., FC Horttor R. L. Mars Missions Posters, Thu, p.m., FC Hegyi S. Print Only: Education Horvath A. Print Only: Education Hegyi s. EIPO Demonstrations, Sun, p.m., LPI Horvath A. Missions and Instruments Posters, Thu, p.m., FC Reineck J. T. Digging Deeper Posters, Tue, p.m., FC Horvath A. Astrobiology Posters, Thu, p.m., FC Heki K. Lunar Geophysics Posters, Thu, p.m., FC Horz F. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Helbert J. * Future Mars and Asteroid Missions, Fri, a.m., Salon C Horz F. Asteroids and Comets Posters, Thu, p.m., FC Helfenstein P. Lunar Remote Sensing Posters, Thu, p.m., FC Horz F. Print Only: Meteorites Remley R. J. Space Weather, Mon, p.m., Salon A Horz F. Space Weather, Mon, p.m., Salon A Henderson B. G. Lunar Remote Sensing Posters, Thu, p.m., FC Horz F. Digging Deeper Posters, Tue, p.m., FC Hendrix A. R. * Space Weather, Mon, p.m., Salon A Houseman G. Venus, Thu, a.m., Salon A Henneken E. A. Maps 'n Bits Posters, Tue, p.m., FC Hausen K. R. * Digging Deeper, Tue, a.m., Salon C HenryM. Education and Public Outreach Posters, Thu, p.m., FC Housley R. M. * Carbonaceous Chondrites, Tue, p.m., Marina Plaza Herd C. D. K. Rocks Made to Order Posters, Tue, p.m., FC Howard A. D. Mars Wet and Wild, Thu, a.m., Salon B Herd C. D. K. Martian Meteorites, Wed, a.m., Marina Plaza Howard A. D.* Recent Water on Mars, Thu, p.m., Salon B Herd C. D. K* Evolution of the Martian Interior, Wed, p.m., Salon C Howard A.D. Mars Impacts Posters, Thu, p.m., FC Herd R. Meteoritic Potpourri Posters, Tue, p.m., FC Howard A.D. Mars Geology, Fri, a.m., Salon B Herd R. Mars Instruments Posters, Thu, p.m., FC Howell E. S. Asteroids and Comets, Wed, a.m., Salon C Herd R. K. Ordinary Chondrites Posters, Thu, p.m., FC HowellR.R. Outer Body Experiences Posters, Tue, p.m., FC Herkenhoff K. E. Future Mars and Asteroid Missions, Fri, a.m., Salon C Howington-Kraus E. MER 2003 Landing Sites Posters, Tue, p.m., FC Herr K. C. Mars Surface Composition, Tue, a.m., Salon B Howington-Kraus E. Maps 'n Bits Posters, Tue, p.m., FC Herr K. C. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B HsuW. Martian Meteorites Posters, Thu, p.m., FC Herr K. C. Mars Surface Posters, Tue, p.m., FC HuaX* Carbonaceous Chondrites, Tue, a.m., Marina Plaza Herrick R. R. Mars Tectonics/Geophysics Posters, Tue, p.m., FC HuangY. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Herrick R. R. * Mars Geomorphology, Wed, p.m., Salon B HuangY. Astrobiology Posters, Thu, p.m., FC Herrmann S. Ordinary Chondrites Posters, Thu, p.m., FC Hubble H. W. Mars Instruments Posters, Thu, p.m., FC HerrmannS. Martian Meteorites Posters, Thu, p.m., FC Hudoba E. Print Only: Education Hertz J. Chondrules Posters, Tue, p.m., FC Hudoba Gy. Print Only: Education Hervig R. Rocks Made to Order Posters, Tue, p.m., FC Hughes J. S. Print Only: Data Distribution Herzog G. F. Ordinary Chondrites Posters, Thu, p.m., FC Hughes J. S. Maps 'n Bits Posters, Tue, p.m., FC Hess P. C. Lunar Basalts, Mon, a.m., Salon A Hughes S. S. Mars Volcanism, Mon, p.m., Salon B Hess P. C. Lunar Science, Tue, p.m., Salon A HuislW. Martian Meteorites Posters, Thu, p.m., FC Hess P. C. Evolution of the Martian Interior, Wed, p.m., Salon C HumayunM. Carbonaceous Chondrites, Tue, a.m., Marina Plaza Hessen K. Mars Geomorphology, Wed, p.m., Salon B HumayunM. Poking Holes Posters, Tue, p.m., FC Hewins R. H. Print Only: Meteorites HumayunM. Moon and Mercury Posters, Tue, p.m., FC Hezel D. C.* Carbonaceous Chondrites, Tue, a.m., Marina Plaza HumayunM. Rocks Made to Order Posters, Tue, p.m. FC Hibbitts C. A. Moving and Grooving Ice, Tue, a.m., Salon A HumayunM.* Achondrites, Wed, p.m., Marina Plaza Hibbitts C. A.* Moving and Grooving Ice, Tue, a.m., Salon A HumayunM. Evolution of the Early Earth, Thu, p.m. Salon C Hicks M. Asteroids and Comets, Wed, a.m., Salon C Humphrys T. L. Lunar Science, Tue, p.m., Salon A Hiesinger H. Moon and Mercury Posters, Tue, p.m., FC HuntP. A. Ordinary Chondrites Posters, Thu, p.m., FC Hiesinger H.* Mars Geomorphology, Wed, p.m., Salon B HuntT. S. Education and Public Outreach Posters, Thu, p.m., FC Hildebrand A. R. Chicxulub Posters, Tue, p.m., FC Hupe A. c. Basaltic Achondrites, Thu, a.m., Marina Plaza Hildebrand A. R. Poking Holes Posters, Tue, p.m., FC HupeG. M. Basaltic Achondrites, Thu, a.m. Marina Plaza Hill D. H. Ordinary Chondrites Posters, Thu, p.m., FC Hurford T. Moving and Grooving Ice, Tue, a.m., Salon A Hill D. H. Achondrites Posters, Thu, p.m., FC Hurowitz J. A. Mars Alteration Posters, Tue, p.m., FC Hill H. H. Mars Instruments Posters, Thu, p.m., FC Hurtado-Cardador M. Print Only: Chicxulub Hillegonds D. J. Ordinary Chondrites Posters, Thu, p.m., FC Huss G. R. The Wrath of Khandrules, Mon, a.m., Marina Plaza Hinnell A. Print Only: Mars HussG. R. Nucleosynthesis, Mon, p.m., Marina Plaza Hiramoto T. Lunar Remote Sensing Posters, Thu, p.m., FC HussG. R. Carbonaceous Chondrites, Tue, a.m., Marina Plaza Hirata N. Lunar Remote Sensing Posters, Thu, p.m., FC Huss G. R. Presolar Grains, Thu, p.m., Marina Plaza Hiroi T. Print Only: Small Bodies HussG. R. CA!s Posters, Thu, p.m. FC Hiroi T. Carbonaceous Chondrites Posters, Tue, p.m., FC Huss G. R. Ordinary Chondrites Posters, Thu, p.m., FC Hiroi T. Asteroids and Comets Posters, Thu, p.m., FC Huss G. R. CA!s, Fri, a.m. Marina Plaza Hiyagon H. Chondrules Posters, Tue, p.m., FC Hustoft J. W. Terrestrial Planets Posters, Thu, p.m., FC Hiyagon H. CA!s Posters, Thu, p.m., FC Hutcheon I. D. CA!s Posters, Thu, p.m., FC HiyagonH.* CA!s, Fri, a.m., Marina Plaza Hutchison J. E. Mars Geomorphology, Wed, p.m., Salon B Hock A. Print Only: Astrobiology Huth J. Space Weather, Mon, p.m., Salon A Hock A. Astrobiology: New Detectives, Fri, a.m., Salon A Hutsemekers D. IDPs: Comets and Asteroids, Wed, p.m. Salon A Hohenberg C. M. Print Only: Meteorites Hyde T. W. Print Only: Origins Hohenherg C. M. Carbonaceous Chondrites, Tue, a.m., Marina Plaza Hynek B. M.* Mars Wet and Wild, Thu, a.m., Salon B Holinl. V. Print Only: Moon Igarashi G. Carbonaceous Chondrites Posters, Tue, p.m., FC Holley A. Ordinary Chondrites, Thu, p.m., Salon A IijimaY. Lunar Remote Sensing Posters, Thu, p.m., FC Holmes D.P. Mars Missions Posters, Thu, p.m., FC Ikeda Y. Martian Meteorites, Wed, a.m., Marina Plaza Holsapple K. A.* Asteroids and Comets, Wed, a.m., Salon C Ikeda Y. Achondrites, Wed, p.m., Marina Plaza Holsapple K. A. Asteroids and Comets Posters, Thu, p.m., FC Illes E. EIPO Demonstrations, Sun, p.m., LPI Holzheid A.* Evolution of the Early Earth, Thu, p.m., Salon C llukhina J. Mars Missions Posters, Thu, p.m., FC

34th LPSC Program Index------161 ImaeN* Martian Meteorites, Wed, a.m., Marina Plaza Johnson J. Ordinary Chondrites Posters, Thu, p.m., FC ImaiH. The Wrath of Khandrules, Mon, a.m., Marina Plaza Johnson J. R. Print Only: Meteorites Imamura T. Venus Posters, Thu, p.m., FC Johnson J. R. Space Weather, Mon, p.m., Salon A Ipatov S. I. Print Only: Asteroidal and Cometary Dust Johnson J. R. Mars Surface Posters, Tue, p.m., FC Ipatov S. I. Origins of Planetary Systems, Thu, a.m., Salon C Johnson M. J. Future Mars and Asteroid Missions, Fri, a.m., Salon C Ireland T. R. Origins of Planetary Systems Posters, Thu, p.m., FC Johnson N. Nucleosynthesis, Mon, p.m., Marina Plaza Irving A. J.* Basaltic Achondrites, Thu, a.m., Marina Plaza Johnson N. Carbonaceous Chondrites Posters, Tue, p.m., FC Irving A. J. Martian Meteorites Posters, Thu, p.m., FC Johnson P. V. Mars Instruments Posters, Thu, p.m., FC Irwin R. IJI Mars Wet and Wild Posters, Thu, p.m., FC Johnson S. T. Outer Body Experiences Posters, Tue, p.m., FC Irwin R. P. III Mars Wet and Wild, Thu, a.m., Salon B Johnson T. V. Outer Body Experiences Posters, Tue, p.m., FC Irwin R. P. IJI Mars Wet and Wild Posters, Thu, p.m., FC Johnson T. V. Io and Beyond, Wed, a.m., Salon A Irwin R. P. III* Mars Geology, Fri, a.m., Salon B Johnson W. T. K. Mars Missions Posters, Thu, p.m., FC Isbell C. E. Lunar Remote Sensing Posters, Thu, p.m., FC Johnston A. Mars Wet and Wild Posters, Thu, p.m., FC Ishiguro M. Carbonaceous Chondrites Posters, Tue, p.m., FC Johnston D. T. Astrobiology Posters, Thu, p.m., FC Ishii T. Lunar Science, Tue, p.m., Salon A Jolliff B. SPA Sample Return, Mon, a.m., Salon A Ivanov A. Mars Odyssey, Mon, a.m., Salon B Jolliff B. L. SPA Sample Return, Mon, a.m., Salon A Ivanov A. Carbonaceous Chondrites Posters, Tue, p.m., FC Jolliff B. L* SPA Sample Return, Mon, a.m., Salon A Ivanov A. B. MER 2003 Landing Sites Posters, Tue, p.m., FC Jolliff B. L. Lunar Science, Tue, p.m., Salon A Ivanov B. A. Print Only: Chicxulub Jolliff B. L. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Ivanov B. A* Poking Holes, Mon, a.m., Salon C Jolliff B. L. Moon and Mercury Posters, Tue, p.m., FC Ivanov L. I. Print Only: Moon Jolliff B. L. Mars Instruments Posters, Thu, p.m., FC Ivanov L. I. Print Only: Meteorites Jolliff B. L. Future Mars and Asteroid Missions, Fri, a.m., Salon C IvanovM. A. Mars Odyssey Posters, Tue, p.m., FC Jones J. H. Evolution of the Martian Interior, Wed, p.m., Salon C Ivanov M.A.* Venus, Thu, a.m., Salon A Jones J. H. Achondrites, Wed, p.m., Marina Plaza Ivanova M. A. Print Only: Impacts Jones J. H. Terrestrial Planets Posters, Thu, p.m., FC Ivanova M. A. Carbonaceous Chondrites Posters, Tue, p.m., FC Jones R. H.* Achondrites, Wed, p.m., Marina Plaza !vanova M. A. Basaltic Achondrites, Thu, a.m., Marina Plaza Jones R. H. Basaltic Achondrites, Thu, a.m., Marina Plaza Ivanova M. A. Achondrites Posters, Thu, p.m., FC Jones R. H. Education and Public Outreach Posters, Thu, p.m., FC !vliev A. I. Print Only: Moon Jones S. M. * Missions and Instruments, Thu, a.m., Salon A Ivliev A. I. Print Only: Meteorites Jones S. M. Interplanetary Dust Posters, Thu, p.m., FC Izenberg N. R. * Asteroids and Comets, Wed, a.m., Salon C Jones S. M. Future Mars and Asteroid Missions, Fri, a.m., Salon C Jabeen I. Chondrules Posters, Tue, p.m., FC Jordan C. E. Print Only: Education JacksonM. A Print Only: Education Joseph J. Future Mars and Asteroid Missions, Fri, a.m., Salon C Jackson N. W. Print Only: Moon Josset J.-L. Future Mars and Asteroid Missions, Fri, a.m., Salon C Jackson N. W. Moon and Mercury Posters, Tue, p.m., FC Joswiak D. J. IDPs: Comets and Asteroids, Wed, p.m., Salon A Jackson S. P. Astrobiology Posters, Thu, p.m., FC JoswiakD. J. Interplanetary Dust Posters, Thu, p.m., FC Jacobsen C. IDPs: Comets and Asteroids, Wed, p.m., Salon A Joyner R. Maps 'n Bits Posters, Tue, p.m., FC Jacobsen S. B. Print Only: Meteorites J6zsa S. Education and Public Outreach Posters, Thu, p.m., FC Jacobsen S. B. Moon and Mercury Posters, Tue, p.m., FC JuliA. J. T. Ordinary Chondrites, Thu, p.m., Salon A Jacobsen S. B. Achondrites, Wed, p.m., Marina Plaza Jull A. J. T. Ordinary Chondrites Posters, Thu, p.m., FC Jacobsen S. B. Origins of Planetary Systems, Thu, a.m., Salon C JurdyD. M. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Jacobsen S. B.* Evolution of the Early Earth, Thu, p.m., Salon C JurdyD. M. Venus Posters, Thu, p.m., FC Jaeger W. Red Hot Lava Posters, Tue, p.m., FC Jurena D. J. Poking Holes Posters, Tue, p.m., FC Jaeger W. L. * Mars Volcanism Mon, p.m., Salon B Jurewicz A. J. G. Missions and Instruments, Thu, a.m., Salon A Jaeger W. L. Io and Beyond, Wed, a.m., Salon A Jurewicz A. J. G. Future Mars and Asteroid Missions, Fri, a.m., Salon C Jager K. M. Print Only: Mars Kabai S. Print Only: Education Jager K. M. Mars Geomorphology Posters, Thu, p.m., FC Kabai S. EIPO Demonstrations, Sun, p.m., LPI Jagoutz E. Martian Meteorites, Wed, a.m., Marina Plaza Kadel S. D. Education and Public Outreach Posters, Thu, p.m., FC Jakosky B. M. Mars Odyssey, Mon, a.m., Salon B Kadono T. Digging Deeper, Tue, a.m., Salon C Jakosky B. M. Astrobiology: New Detectives, Fri, a.m., Salon A KadonoT. Astrobiology Posters, Thu, p.m., FC James C. Moon and Mercury Posters, Tue, p.m., FC Kalinina G. V. Print Only: Moon James C. L. Moon and Mercury Posters, Tue, p.m., FC Kalinina G. V. Print Only: Meteorites James O. B* Lunar Science, Tue, p.m., Salon A KampL. Io and Beyond, Wed, a.m., Salon A Janes D. EIPO Demonstrations, Sun, p.m., LPI Kanik I. Carbonaceous Chondrites Posters, Tue, p.m., FC Janes D. Mars Odyssey, Mon, a.m., Salon B Kanik I. Mars Instruments Posters, Thu, p.m., FC Janes D. M. Mars Odyssey Posters, Tue, p.m., FC Kanik I. Astrobiology Posters, Thu, p.m., FC Janney P. Basaltic Achondrites, Thu, a.m., Marina Plaza Kanik I. Astrobiology: New Detectives, Fri, a.m., Salon A Janney P. E. Nucleosynthesis, Mon, p.m., Marina Plaza Kanizay K. Future Mars and Asteroid Missions, Fri, a.m., Salon C Janney P. E. Evolution of the Martian Interior, Wed, p.m., Salon C Kanno A. Carbonaceous Chondrites Posters, Tue, p.m., FC JanneyP. E* CA!s, Fri, a.m., Marina Plaza Karandashev V. K. Print Only: Moon Jaret S. J. Mars Impacts Posters, Thu, p.m., FC KaratsonD. Outer Body Experiences Posters, Tue, p.m., FC Jarnot B. M. Poking Holes Posters, Tue, p.m., FC KareemK. M. Terrestrial Planets Posters, Thu, p.m., FC Jarrett T. H. Asteroids and Comets, Wed, a.m., Salon C Kareev M. S. * Space Weather, Mon, p.m., Salon A Jarvis K. Astrobiology Posters, Thu, p.m., FC KareevM. S. Recent Water on Mars, Thu, p.m., Salon B Jarvis K. S. Outer Body Experiences Posters, Tue, p.m., FC Kargel J. S. Outer Body Experiences Posters, Tue, p.m., FC Jaumann R. Print Only: Mars Kargel J. S.* Cold and Windy on Mars, Wed, a.m., Salon B JaumannR. Moving and Grooving Ice, Tue, a.m., Salon A Kargel J. S. Mars Bipolar Syndrome Posters, Thu, p.m., FC JaumannR. Moon and Mercury Posters, Tue, p.m., FC Kama A. Mars Volcanism Mon, p.m., Salon B JaumannR. Asteroids and Comets, Wed, a.m., Salon C Karner D. B. Moon and Mercury Posters, Tue, p.m., FC JaumannR. Recent Water on Mars, Thu, p.m., Salon B Karner J. M. Print Only: Meteorites Jeffries T. E. CA!s Posters, Thu, p.m., FC Karner J. M. Meteoritic Potpourri Posters, Tue, p.m., FC Jehin E. IDPs: Comets and Asteroids, Wed, p.m., Salon A Karner J. M. Terrestrial Planets Posters, Thu, p.m., FC Jenniskens P. IDPs: Comets and Asteroids, Wed, p.m., Salon A KarnerJ. M. Education and Public Outreach Posters, Thu, p.m., FC Jepsen P. L. Mars Missions Posters, Thu, p.m., FC Karunatillake S. Mars Odyssey, Mon, a.m., Salon B Jess berger E. K. Ordinary Chondrites, Thu, p.m., Salon A Karunatillake S. Mars Odyssey Posters, Tue, p.m., FC Johnson C. L. Mars Geophysics and Tectonics, Tue, p.m., Salon C Kashkarov L. L. Print Only: Moon Johnson C. L. * Mars Geophysics and Tectonics, Tue, p.m., Salon C Kashkarov L. L. Print Only: Meteorites Johnson C. L. Lunar Geophysics Posters, Thu, p.m., FC KassD. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Johnson C. M. Moon and Mercury Posters, Tue, p.m., FC Kattenhorn S. A. Outer Body Experiences Posters, Tue, p.m., FC Johnson D. W. Astrobiology Posters, Thu, p.m., FC Katzenstein W. P. Venus Posters, Thu, p.m., FC

162 34th LPSC Program Index Kawabata T. The Wrath of Khandrules, Mon, a.m., Marina Plaza Kisse K. Astrobiology: New Detectives, Fri, a.m., Salon A Kaydash V. G. Lunar Remote Sensing Posters, Thu, p.m., FC Kita N. T. Chondrules Posters, Tue, p.m., FC Kazantseva L. V. Print Only: Moon Kita N. T* Achondrites, Wed, p.m., Marina Plaza Kazilin E. E. Print Only: Moon Klaasen K. Print Only: Missions and Instruments Keating G. M.* Mars Odyssey, Mon, a.m., Salon B KingS. Education and Public Outreach Posters, Thu, p.m., FC Keck B. D. Meteoritic Potpourri Posters, Tue, p.m., FC Klug S. L. Education and Public Outreach Posters, Tbu, p.m., FC Keil K. Carbonaceous Chondrites Posters, Tue, p.m., FC Knie K. CAis Posters, Tbu, p.m., FC KeimE. R. Mars Surface Posters, Tue, p.m., FC Knie K. Ordinary Chondrites Posters, Thu, p.m., FC Keith L. Print Only: Missions and Instruments Knight A. K. Print Only: Mars Keller J. Mars Odyssey, Mon, a.m., Salon B Kobayashi K. Origins of Planetary Systems Posters, Thu, p.m., FC Keller J. M. EIPO Demonstrations, Sun, p.m., LPI Kobayashi S. The Wrath of Khandrules, Mon, a.m., Marina Plaza Keller J. M. Mars Odyssey Posters, Tue, p.m., FC KobrickM. Print Only: Chicxulub Keller J. W. Education and Public Outreach Posters, Thu, p.m., FC Koeherl C* Poking Holes, Mon, a.m., Salon C Keller L. P. Print Only: Moon Koeberl C. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Keller L. P. Space Weather, Mon, p.m., Salon A Koeppen W. C. MER 2003 Landing Sites Posters, Tue, p.m., FC Keller L. P. Carbonaceous Chondrites, Tue, a.m., Marina Plaza Kogure T. Carbonaceous Chondrites Posters, Tue, p.m., FC Keller L. P. Moon and Mercury Posters, Tue, p.m., FC Kohlstedt D. L. Terrestrial Planets Posters, Thu, p.m., FC Keller L. P. IDPs: Comets and Asteroids, Wed, p.m., Salon A Koizumi E. Martian Meteorites, Wed, a.m., Marina Plaza Keller L. P.* IDPs: Comets and Asteroids, Wed, p.m., Salon A KoizumiE* Martian Meteorites, Wed, a.m., Marina Plaza Keller L. P. Presolar Grains, Thu, p.m., Marina Plaza KoizumiE. Martian Meteorites Posters, Thu, p.m., FC Keller L. P. Interplanetary Dust Posters, Thu, p.m., FC Kojima H. Print Only: Asteroidal and Cometary Dust KellyN. Mars Odyssey, Mon, a.m., Salon B Kojima H. Martian Meteorites, Wed, a.m., Marina Plaza Kelly S. Print Only: Data Distribution KolarS. E. Achondrites Posters, Thu, p.m., FC Kenkmann T.* Poking Holes, Mon, a.m., Salon C KolbE. J. Mars Geologic Mapping Posters, Tue, p.m., FC Kenkmann T. Chicxulub Scientifc Drilling, Moo, p.m., Salon C Kollar D. Achondrites Posters, Thu, p.m., FC Kenkmann T. Chicxulub Posters, Tue, p.m., FC Kolotov V. P. Print Only: Moon KenkmannT. Rocks Made to Order Posters, Tue, p.m., FC Komatsu G. Mars Terrestial Analogs Posters, Thu, p.m., FC Kerese P. Print Only: Education Komatsu G. Mars Wet and Wild Posters, Thu, p.m., FC Keresztesi M. Print Only: Education KomatsuM. Carbonaceous Chondrites Posters, Tue, p.m., FC Keresztnri A. Print Only: Astrobiology KongM. Moon and Mercury Posters, Tue, p.m., FC Kereszturi A. EIPO Demonstrations, Sun, p.m., LPI Konopliv A. S. Asteroids and Comets, Wed, a.m., Salon C Keresztnri A. Mars Atmosphere Posters, Tue, p.m., FC Kornreich D. A. Print Only: Education Kereszturi A. Outer Body Experiences Posters, Tue, p.m., FC Korochantsev A. V. Print Only: Impacts Keresztnri A. Education and Public Outreach Posters, Thu, p.m., FC Korochantseva E. V. Achondrites Posters, Thu, p.m., FC Kerry K. EIPO Demonstrations, Sun, p.m., LPI Korokhin V. V. Print Only: Data Distribution Kerry K. Mars Odyssey, Mon, a.m., Salon B Korotaeva N. N. Print Only: Small Bodies Kerry K. Mars Odyssey Posters, Tue, p.m., FC Korotchantseva E. V. * Basaltic Achondrites, Thu, a.m., Marina Plaza Kessler D. J. Asteroids and Comets Posters, Thu, p.m., FC Korotev R. L. SPA Sample Retnrn, Mon, a.m., Salon A Keszthelyi L. Outer Body Experiences Posters, Tue, p.m., FC Korotev R. L. Lunar Science, Tue, p.m., Salon A Keszthelyi L. Io and Beyond, Wed, a.m., Salon A Korotev R. L. • Lunar Science, Tue, p.m., Salon A Keszthelyi L. * Io and Beyond, Wed, a.m., Salon A Korotev R. L. Moon and Mercury Posters, Tue, p.m., FC Keszthelyi L. P. Mars Volcanism, Mon, p.m., Salon B Korschinek G. CAis Posters, Thu, p.m., FC Keszthelyi L. P. Red Hot Lava Posters, Tue, p.m., FC Korschinek G. Ordinary Chondrites Posters, Thu, p.m., FC Keszthelyi L. P. Outer Body Experiences Posters, Tue, p.m., FC Korycansky D. G.* Poking Holes, Mon, a.m., Salon C Keszthelyi L. P. Io and Beyond, Wed, a.m., Salon A Korycansky D. G. Digging Deeper Posters, Tue, p.m., FC Ketcham R. A. Basaltic Achondrites, Thu, a.m., Marina Plaza Koscheev A. P. CAis Posters, Thu, p.m., FC Ketcham R. A. Ordinary Chondrites, Thu, p.m., Salon A Kosmo J. Print Only: Data Distribution Khan A. Lunar Geophysics Posters, Thu, p.m., FC Kostama V.-P. Print Only: Mars KieferW. S* Mars Geophysics and Tectonics, Tue, p.m., Salon C Kostama V.-P. Venus Posters, Thu, p.m., FC Kiefer W. S. Venus Posters, Thu, p.m., FC Kostama V.-P. Mars Bipolar Syndrome Posters, Thu, p.m., FC Kieffer H. H. Mars Odyssey, Mon, a.m., Salon B Kovacs B. Print Only: Education Kikwaya J.-B. Asteroids and Comets Posters, Thu, p.m., FC Kovacs Zs. Print Only: Education Kilby R. E. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Kovacs Zs. EIPO Demonstrations, Sun, p.m., LPI Kilgore M. Achondrites, Wed, p.m., Marina Plaza Koziol A.M. Martian Meteorites Posters, Thu, p.m., FC KillenR. Asteroids and Comets Posters, Thu, p.m., FC Kozlova E. A. Mars Missions Posters, Thu, p.m., FC Killgore M. Print Only: Impacts Kozyrev A. S. Mars Odyssey, Mon, a.m., Salon B Killgore M. The Wrath of Khandrules, Mon, a.m., Marina Plaza Kozyrev A. S. Mars Odyssey Posters, Tue, p.m., FC Killgore M. Achondrites Posters, Thu, p.m., FC Kraal E. R. Mars Wet and Wild Posters, Thu, p.m., FC Killgore M. B. Ordinary Chondrites Posters, Thu, p.m., FC Kracher A. Asteroids and Comets, Wed, a.m., Salon C Kim H. Astrobiology Posters, Thu, p.m., FC Kracher A* Asteroids and Comets, Wed, a.m., Salon C Kim H. R. Lunar Geophysics Posters, Thu, p.m., FC KraftM. D.* Mars Surface Composition, Tue, a.m., Salon B KimK. J. Mars Odyssey, Mon, a.m., Salon B Kramer G. Y. Moon and Mercury Posters, Tue, p.m., FC KimK. J. Mars Odyssey Posters, Tue, p.m., FC Krassilnikov A. S. Print Only: Venus KimS. S. Mars Instruments Posters, Thu, p.m., FC Krassilnikov A. S. Venus Posters, Thu, p.m., FC KimuraM. Carbonaceous Chondrites, Tue, a.m., Marina Plaza KrcoM. Print Only: Education KimuraM. CAis, Fri, a.m., Marina Plaza Kreslavsky M. A* Mars Geomorphology, Wed, p.m., Salon B Kindel B. C. Astrobiology: New Detectives, Fri, a.m., Salon A Kresla vsky M. A. Mars Geomorphology Posters, Thu, p.m., FC King D. T. Jr. Poking Holes Posters, Tue, p.m., FC Kreslavsky M. A. Mars Bipolar Syndrome Posters, Thu, p.m., FC KingS. D. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Kreslavsky M. A. Mars Geology, Fri, a.m., Salon B Kinsland G. L. Print Only: Chicxulub Kretke K. A. Mars 2003 Rover/Spectral Stndies, Tue, p.m., Salon B Kirchoff M. R. Outer Body Experiences Posters, Tue, p.m., FC Kring D. A. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Kirk R. L. MER 2003 Landing Sites Posters, Tue, p.m., FC Kring D. A.* Chicxulub Scientifc Drilling, Mon, p.m., Salon C Kirk R. L. Maps 'n Bits Posters, Tue, p.m., FC Kring D. A. Chicxulub Posters, Tue, p.m., FC Kirk R. L. Mars Geology, Fri, a.m., Salon B Kring D. A. Digging Deeper Posters, Tue, p.m., FC Kirkland L. E.* Mars Surface Composition, Tue, a.m., Salon B Kring D. A. Mars Instruments Posters, Thu, p.m., FC Kirkland L. E. Mars 2003 Rover/Spectral Stndies, Tue, p.m., Salon B Krochuk R. V. Poking Holes Posters, Tue, p.m., FC Kirkland L. E. Mars Surface Posters, Tue, p.m., FC Kronberg P. Print Only: Mars Kirschvink J. L. Astrobiology: New Detectives, Fri, a.m., Salon A KrotA. N. The Wrath of Khandrules, Mon, a.m., Marina Plaza Kiss Sz. Print Only: Education KrotA. N.* The Wrath of Khandrules, Mon, a.m., Marina Plaza Kisse K. Print Only: Astrobiology KrotA. N. Carbonaceous Chondrites, Tue, a.m., Marina Plaza

34th LPSC Program Index------163 Krot A. N. Carbonaceous Chondrites Posters, Tue, p.m., FC Lee P. Astrobiology: New Detectives, Fri, a.m., Salon A KrotA. N. CAis Posters, Thu, p.m., FC Lee S. Moving and Grooving Ice, Tue, a.m., Salon A Kruger H. IDPs: Comets and Asteroids, Wed, p.m., Salon A Lee T. Nucleosynthesis, Mon, p.m., Marina Plaza Krull A. E. Poking Holes Posters, Tue, p.m., FC Leftwich T. Lunar Geophysics Posters, Thu, p.m., FC Kubovics I. Education and Public Outreach Posters, Thu, p.m., FC Lehmann B. Mars Geology, Fri, a.m., Salon B Kuebler K. Mars Instruments Posters, Thu, p.m., FC Leinbardt z. M. Asteroids and Cornets, Wed, a.m., Salon C Kuebler K. E. Mars Instruments Posters, Thu, p.m., FC Leitner J. IDPs: Comets and Asteroids, Wed, p.m., Salon A Kuebler K. E. Future Mars and Asteroid Missions, Fri, a.m., Salon C Lellouch E. Print Only: Outer Planets Kuehner S. M. Basaltic Achondrites, Thu, a.m., Marina Plaza Lemke L. G. Mars Instruments Posters, Thu, p.m., FC Kuehner S. M. Martian Meteorites Posters, Thu, p.m., FC LemkeL. G. Astrobiology Posters, Thu, p.m., FC Kuhlman K. Mars Instruments Posters, Thu, p.m., FC LemmonM. T. Mars Missions Posters, Thu, p.m., FC Kuhlman K. R. Astrobiology: New Detectives, Fri, a.m., Salon A Lemoine F. G. Maps 'n Bits Posters, Tue, p.m., FC Kulleck J. Carbonaceous Chondrites Posters, Tue, p.m., FC Lentz R. C. F.* Martian Meteorites, Wed, a.m., Marina Plaza Kunihiro T. The Wrath of Khandrules, Mon, a.m., Marina Plaza Leone G. L. Outer Body Experiences Posters, Tue, p.m., FC Kurahashi E. Moon and Mercury Posters, Tue, p.m., FC LepperK. Mars Instruments Posters, Thu, p.m., FC Kuramoto K. Mars Bipolar Syndrome Posters, Thu, p.m., FC LernerN. R. Carbonaceous Chondrites Posters, Tue, p.m., FC KuratG. Print Only: Meteorites Leshin L.A. The Wrath of Khandrules, Mon, a.m., Marina Plaza KuratG. Print Only: Impacts Leshin L.A. Carbonaceous Chondrites, Tue, a.m., Marina Plaza Kurat G. The Wrath of Khandrules, Mon, a.m., Marina Plaza Leshin L.A. Martian Meteorites, Wed, a.m., Marina Plaza Kurat G. Carbonaceous Chondrites Posters, Tue, p.m., FC Leshin L.A. Evolution of the Martian Interior, Wed, p.m., Salon C KuratG. Achondrites, Wed, p.m., Marina Plaza Leshin L.A. Mars Missions Posters, Thu, p.m., FC Kurat G* Basaltic Achondrites, Thu, a.m., Marina Plaza Leshin L.A. Martian Meteorites Posters, Thu, p.m., FC Kurat G. Ordinary Chondrites Posters, Thu, p.m., FC Leshin L. A.* Future Mars and Asteroid Missions, Fri, a.m., Salon C KuratG. Interplanetary Dust Posters, Thu, p.m., FC Letsinger S. L. Moon and Mercury Posters, Tue, p.m., FC KurtM. J. Maps 'n Bits Posters, Tue, p.m., FC Levant J. M.S. Education and Public Outreach Posters, Thu, p.m., FC KurzM. Print Only: Meteorites Levasseur S. Poking Holes, Mon, a.m., Salon C Kusnirak P. Asteroids and Comets, Wed, a.m., Salon C Levasseur S. Lunar Science, Tue, p.m., Salon A Kuyunko N. S. Print Only: Meteorites Lever J. H. Interplanetary Dust Posters, Thu, p.m., FC KuzminR. O. Mars Odyssey Posters, Tue, p.m., FC LeveringtonD. W. Mars Wet and Wild Posters, Thu, p.m., FC KuzminR. O. Mars Wet and Wild Posters, Thu, p.m., FC Levine J. Moon and Mercury Posters, Tue, p.m., FC KuzminR. O. Mars Geomorphology Posters, Thu, p.m., FC Levison H. Moving and Grooving Ice, Tue, a.m., Salon A LaClair D. A. Print Only: Mars Levison H. F. Io and Beyond, Wed, a.m., Salon A Lacour J. L Mars Instruments Posters, Thu, p.m., FC Levskii L. K. Meteoritic Potpourri Posters, Tue, p.m., FC Lacour J. L. Future Mars and Asteroid Missions, Fri, a.m., Salon C Lewis K. Mars Geomorphology, Wed, p.m., Salon B Lahtela H. Print Only: Mars Lewis K. Education and Public Outreach Posters, Thu, p.m., FC Laity J. E. Cold and Windy on Mars, Wed, a.m., Salon B LewisR. S. Nucleosynthesis, Mon, p.m., Marina Plaza Lana C.* Poking Holes, Mon, a.m., Salon C Lewis R. S. Presolar Grains, Thu, p.m., Marina Plaza Lanagan P. Mars Geomorphology, Wed, p.m., Salon B Leyai. Ordinary Chondrites Posters, Thu, p.m., FC Landgraf M* IDPs: Comets and Asteroids, Wed, p.m., Salon A LiJ. Carbonaceous Chondrites Posters, Tue, p.m., FC Lane M.D. Mars Odyssey, Mon, a.m., Salon B LiangY. Lunar Basalts, Mon, a.m., Salon A LaneM. D. Mars Surface Composition, Tue, a.m., Salon B Liang Y* Lunar Science, Tue, p.m., Salon A LaneM. D. Mars Odyssey Posters, Tue, p.m., FC Libourel G. The Wrath of Khandrules, Mon, a.m., Marina Plaza LaneM. D. Mars Surface Posters, Tue, p.m., FC Libourel G* The Wrath of Khandrules, Mon, a.m., Marina Plaza LangN. P. Venus Posters, Thu, p.m., FC Libourel G. Rocks Made to Order Posters, Tue, p.m., FC Langenborst F. Print Only: Chicxulub Libourel G. IDPs: Comets and Asteroids, Wed, p.m., Salon A Lanzirotti A. Interplanetary Dust Posters, Thu, p.m., FC Libowitzky E. Poking Holes, Mon, a.m., Salon C Larsen G. Print Only: Mars Lin C. Martian Meteorites Posters, Thu, p.m., FC Larson T. Achondrites, Wed, p.m., Marina Plaza Linares-Lopez C. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Latouche L. Print Only: Impacts Lindsay B. D. Print Only: Origins LauE. Lunar Remote Sensing Posters, Thu, p.m., FC Lindsay J. F* Astrobiology: New Detectives, Fri, a.m., Salon A Lauer H. V. Jr. Mars Alteration Posters, Tue, p.m., FC Lindsley D. H. Mars Alteration Posters, Tue, p.m., FC Lauer H. V. Jr. Martian Meteorites Posters, Thu, p.m., FC Lindsley D. H. Mars Geology, Fri, a.m., Salon B Lauer H. V. Jr. Astrobiology: New Detectives, Fri, a.m., Salon A Lindstrom M. Education and Public Outreach Posters, Thu, p.m., FC Laughlin B. C. Mars Instruments Posters, Thu, p.m., FC Lindstrom M. L. E!PO Demonstrations, Sun, p.m., LPI Lauretta D. S. Poking Holes Posters, Tue, p.m., FC Lindstrom M. M. Education and Public Outreach Posters, Thu, p.m., FC Lauretta D. S* Ordinary Chondrites, Thu, p.m., Salon A Lindstrom M. Print Only: Impacts Lavoie S. Maps 'n Bits Posters, Tue, p.m., FC Lingernann C. M. Ordinary Chondrites Posters, Thu, p.m., FC Lavrentjeva Z. A. Print Only: Meteorites Liou J.-C. Asteroids and Cornets Posters, Thu, p.m., FC Lawrence D. J. * SPA Sample Return, Mon, a.m., Salon A Lipkarnan L. J* Mars Volcanism, Mon, p.m., Salon B Lawrence D. J. Lunar Science, Tue, p.m., Salon A Litvak M. L. Mars Odyssey, Mon, a.m., Salon B Lawrence D. J. Mars Odyssey Posters, Tue, p.m., FC Litvak M. L. Mars Odyssey Posters, Tue, p.m., FC Lawrence D. J. Lunar Remote Sensing Posters, Thu, p.m., FC LiuY.* Achondrites, Wed, p.m., Marina Plaza Lawrence D. J. Mars Instruments Posters, Thu, p.m., FC Livingston A. Mars Geomorphology, Wed, p.m., Salon B Lawrence S. J. Lunar Remote Sensing Posters, Thu, p.m., FC Livingston A. Education and Public Outreach Posters, Thu, p.m., FC Lawson D. E. Mars Bipolar Syndrome Posters, Thu, p.m., FC Llorca J. Print Only: Small Bodies LawsonS. L. Lunar Remote Sensing Posters, Thu, p.m., FC Lofgren G. E. Chondrules Posters, Tue, p.m., FC Lawton D. C. Chicxulub Posters, Tue, p.m., FC Lofgren G. E. Astrobiology: New Detectives, Fri, a.m., Salon A LeL. Carbonaceous Chondrites, Tue, p.m., Marina Plaza LognonneP. Lunar Geophysics Posters, Thu, p.m., FC LeL. Chondrules Posters, Tue, p.m., FC LongazoT. Print Only: Astrobiology LeL. Martian Meteorites, Wed, a.m., Marina Plaza Longazo T. Astrobiology Posters, Thu, p.m., FC Leask H. J. Mars Alteration Posters, Tue, p.m., FC LongazoT. Astrobiology: New Detectives, Fri, a.m., Salon A Lee D. C. Lunar Science, Tue, p.m., Salon A Longhi J.* Lunar Basalts, Mon, a.m., Salon A Lee D-C. Meteoritic Potpourri Posters, Tue, p.m., FC Lopes R. Outer Body Experiences Posters, Tue, p.m., FC Lee D-C.* Achondrites, Wed, p.m., Marina Plaza Lopes R.* Io and Beyond, Wed, a.m., Salon A Lee E. M. Maps 'n Bits Posters, Tue, p.m., FC Lopes R. M. C. Outer Body Experiences Posters, Tue, p.m., FC Lee E. M. Lunar Remote Sensing Posters, Thu, p.m., FC Lopes R. M. C. Io and Beyond, Wed, a.m., Salon A LeeK. Print Only: Mars Odyssey LOpez C. Print Only: Education LeeK. Mars Odyssey, Mon, a.m., Salon B L6pez I. Print Only: Venus LeeK. T. Mars Odyssey Posters, Tue, p.m., FC Lorents C. A. Print Only: Impacts Lee P.* Recent Water on Mars, Thu, p.m., Salon B Lorentz C. A. Achondrites Posters, Thu, p.m., FC

164 34th LPSC Program Index Lorenz C. Ordinary Chondrites Posters, Thu, p.m., FC Marty B. IDPs: Cornets and Asteroids, Wed, p.m., Salon A Lorenz C. A. Print Only: Impacts Marty B* IDPs: Cornets and Asteroids, Wed, p.m., Salon A Lorenz C. A. Basaltic Achondrites, Thu, a.m., Marina Plaza Marty B. Evolution of the Martian Interior, Wed, p.m., Salon C Lorenz R. D. Mars Wet and Wild Posters, Thu, p.m., FC Maruoka T* Achondrites, Wed, p.m., Marina Plaza Lorenz R. L. Mars Wet and Wild Posters, Thu, p.m., FC Maruoka T. Basaltic Achondrites, Thu, a.m., Marina Plaza Lounejeva E. Print Only: Chicxulub Masaitis V. L. Poking Holes, Mon, a.m., Salon C Love G. D. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Masarik J. Outer Body Experiences Posters, Tue, p.m., FC Lowe D. R. Poking Holes Posters, Tue, p.m., FC Masarik J. Achondrites Posters, Thu, p.m., FC Lowes L. Education and Public Outreach Posters, Thu, p.m., FC Mason T. F. D. Chondrules Posters, Tue, p.m., FC Lowry A. R* Mars Geophysics and Tectonics, Tue, p.m., Salon C Masters K. L. Print Only: Education Lowry S.C. Asteroids and Cornets, Wed, a.m., Salon C Mather J. C. Print Only: Asteroidal and Cometary Dust Lowry S. C* Asteroids and Cornets, Wed, a.m., Salon C Mathew K. J. Meteoritic Potpourri Posters, Tue, p.m., FC Lozano-Santamaria R. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Mathew K. J. Evolution of the Martian Interior, Wed, p.m., Salon C Lu J. Meteoritic Potpourri Posters, Tue, p.m., FC Matijevic J. R. MER 2003 Landing Sites Posters, Tue, p.m., FC Lucas M.P. Print Only: Small Bodies MatueyM. Asteroids and Comets Posters, Thu, p.m., FC Lucas M.P. Education and Public Outreach Posters, Thu, p.m., FC MatueyR. N. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Lucas S. G. Print Only: Mars Matson D. L. Outer Body Experiences Posters, Tue, p.m., FC Lucchitta B. K. Red Hot Lava Posters, Tue, p.m., FC Matson D. L* Io and Beyond, Wed, a.m., Salon A LuceyP. G. SPA Sample Return, Mon, a.m., Salon A Matsui T. Digging Deeper, Tue, a.m., Salon C LuceyP. G. Space Weather, Mon, p.m., Salon A Matsui T. Chicxulub Posters, Tue, p.m., FC Lucey P. G. Mars Surface Composition, Tue, a.m., Salon B Matsui T. Digging Deeper Posters, Tue, p.m., FC Lucey P. G. Lunar Science, Tue, p.m., Salon A Matsui T. Astrobiology Posters, Thu, p.m., FC LuceyP. G* Lunar Science, Tue, p.m., Salon A Matsumoto N. Print Only: Asteroidal and Cometary Dust Lucey P. G. Lunar Remote Sensing Posters, Thu, p.m., FC Matsunaga T. Lunar Remote Sensing Posters, Thu, p.m., FC Lucey P. G. Mars Instruments Posters, Thu, p.m., FC Matumoto K. Lunar Geophysics Posters, Thu, p.m., FC Ltiders V. Chicxulub Posters, Tue, p.m., FC Maule J.* Astrobiology: New Detectives, Fri, a.m., Salon A LugaroM. Presolar Grains, Thu, p.m., Marina Plaza MauretteM. Print Only: Astrobiology Lugmair G. W. Nucleosynthesis, Mon, p.m., Marina Plaza MauretteM. Interplanetary Dust Posters, Thu, p.m., FC LugmairG. W. Origins of Planetary Systems, Thu, a.m., Salon C Maurice S. Print Only: Mars Lugmair G. W. Ordinary Chondrites, Thu, p.m., Salon A Maurice S. SPA Sample Return, Mon, a.m., Salon A LuoS. Martian Meteorites, Wed, a.m., Marina Plaza Maurice S. Mars Odyssey, Mon, a.m., Salon B Lyons J. R. Nucleosynthesis, Mon, p.m., Marina Plaza Maurice S. Mars Odyssey Posters, Tue, p.m., FC Lyons J. R.* CA!s, Fri, a.m., Marina Plaza Maurice S. Lunar Remote Sensing Posters, Thu, p.m., FC Lyubchenko S. Yu. Print Only: Origins Maurice S. Mars Instruments Posters, Thu, p.m., FC Lyul A. Yu. Print Only: Meteorites Maurice S. Future Mars and Asteroid Missions, Fri, a.m., Salon C MaP. Ordinary Chondrites Posters, Thu, p.m., FC Maxwell T. A. Mars Wet and Wild Posters, Thu, p.m., FC Macdonald F. A. Poking Holes Posters, Tue, p.m., FC Maxwell T. A. Mars Geology, Fri, a.m., Salon B MacPherson G. J. Carbonaceous Chondrites, Tue, a.m., Marina Plaza Mayeda T. K. Print Only: Meteorites MacPherson G. J.* CAis, Fri, a.m., Marina Plaza Mayeda T. K. Carbonaceous Chondrites Posters, Tue, p.m., FC Macy B. IDPs: Comets and Asteroids, Wed, p.m., Salon A MayneR. G. Moon and Mercury Posters, Tue, p.m., FC MadeyT. E. Print Only: Moon Mazumder M. K. Mars Instruments Posters, Thu, p.m., FC MageeM. Mars Impacts Posters, Thu, p.m., FC Mazzoni A. Missions and Instruments Posters, Thu, p.m., FC MakiJ. N. Future Mars and Asteroid Missions, Fri, a.m., Salon C Mazzoni D. Missions and Instruments Posters, Thu, p.m., FC Makino J. Origins of Planetary Systems Posters, Thu, p.m., FC McAfeeJ. M. Mars Surface Posters, Tue, p.m., FC Makris N. C* Moving and Grooving Ice, Tue, a.m., Salon A McArthur G. K. Mars Odyssey Posters, Tue, p.m., FC MalinM. Mars Odyssey, Mon, a.m., Salon B McBeeJ. H. Outer Body Experiences Posters, Tue, p.m., FC MalinM. C. Print Only: Mars McCallum!. S. Achondrites Posters, Thu, p.m., FC MalinM. C. Mars Odyssey, Mon, a.m., Salon B McCamant J. E. Ordinary Chondrites, Thu, p.m., Salon A MalinM. C. Water on Mars Posters, Thu, p.m., FC McCanta M. C.* Evolution of the Martian Interior, Wed, p.m., Salon C MalinM. C. Mars Geology, Fri, a.m., Salon B McCleese D. J. Recent Water on Mars, Thu, p.m., Salon B Mandell H. Astrobiology Posters, Thu, p.m., FC McColleyS. Red Hot Lava Posters, Tue, p.m., FC Manfroid J. IDPs: Comets and Asteroids, Wed, p.m., Salon A McConnochie T. Mars Odyssey, Mon, a.m., Salon B MangoldN. Mars Surface Composition, Tue, a.m., Salon B McCordT. B. Moving and Grooving Ice, Tue, a.m., Salon A Mantovani J. G. Mars Instruments Posters, Thu, p.m., FC McCord T. B. Asteroids and Comets, Wed, a.m., Salon C MaoH-K. Space Weather, Mon, p.m., Salon A McCoy T. J.* Basaltic Achondrites, Thu, a.m., Marina Plaza MaquetJ. Carbonaceous Chondrites, Tue, p.m., Marina Plaza McCoyT. J. Ordinary Chondrites, Thu, p.m., Salon A Marchant D. R. Cold and Windy on Mars, Wed, a.m., Salon B McCoyT.J. Terrestrial Planets Posters, Thu, p.m., FC Marchant D. R. * Cold and Windy on Mars, Wed, a.m., Salon B McDonough F. W. CA!s, Fri, a.m., Marina Plaza MardonA. A. Print Only: Missions and Instruments McDonough W. F.* Carbonaceous Chondrites, Tue, p.m., Marina Plaza MargotJ. L. Venus, Thu, a.m., Salon A McElfresh S. B. Z. Mars Geology, Fri, a.m., Salon B Marhas K. K. * Nucleosynthesis, Mon, p.m., Marina Plaza McEwen A. Outer Body Experiences Posters, Tue, p.m., FC Marhas K. K. Presolar Grains, Thu, p.m., Marina Plaza McEwen A.* Mars Geomorphology, Wed, p.m., Salon B Marin L. E. Chicxulub Scientifc Drilling, Mon, p.m., Salon C McEwen A. S. Mars Odyssey, Mon, a.m., Salon B MarovM. Ya. Print Only: Venus McEwen A. S. Mars Volcanism, Mon, p.m., Salon B MarovM. Ya* Origins of Planetary Systems, Thu, a.m., Salon C McEwen A. S. Red Hot Lava Posters, Tue, p.m., FC Marrocchi Y. * Carbonaceous Chondrites, Tue, p.m., Marina Plaza McEwen A. S. Outer Body Experiences Posters, Tue, p.m., FC Mars GRS Team Mars Odyssey Posters, Tue, p.m., FC McEwen A. S. Io and Beyond, Wed, a.m., Salon A Marshall J. Moving and Grooving Ice, Tue, a.m., Salon A McEwenA.S. Mars Geomorphology, Wed, p.m., Salon B Marshall J. Mars Instruments Posters, Thu, p.m., FC McEwen A. S. Lunar Remote Sensing Posters, Thu, p.m., FC 2001 Mars Odyssey Team Mars Odyssey, Mon, a.m., Salon B McFaddenL Print Only: Missions and Instruments Marti K. Meteoritic Potpourri Posters, Tue, p.m., FC McFadden L A. Asteroids and Comets, Wed, a.m., Salon C Marti K.* Evolution of the Martian Interior, Wed, p.m., Salon C McFadden L A. Missions and Instruments Posters, Thu, p.m., FC MartinP. D. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B McGill G. E. Mars Geophysics and Tectonics, Tue, p.m., Salon C MartinP. D. Mars Missions Posters, Thu, p.m., FC McGill G. E. Mars Wet and Wild, Thu, a.m., Salon B Martin T. z. Io and Beyond, Wed, a.m., Salon A McGill G. E.* Venus, Thu, a.m., Salon A MartinL Print Only: Education McGovern P. J.* Mars Volcanism, Mon, p.m., Salon B Martinez D. Nucleosynthesis, Mon, p.m., Marina Plaza McGovern P. J. Mars Geophysics and Tectonics, Tue, p.m., Salon C Martinez-Alonso S. * Astrobiology: New Detectives, Fri, a.m., Salon A McGovern P. J. Red Hot Lava Posters, Tue, p.m., FC Marty B. Nucleosynthesis, Mon, p.m., Marina Plaza McGovern P. J. Mars Wet and Wild Posters, Thu, p.m., FC Marty B. Carbonaceous Chondrites, Tue, p.m., Marina Plaza McHone J. F. Print Only: Impacts

34th LPSC Program Index ------165 Mcintosh J. R. Astrobiology: New Detectives, Fri, a.m., Salon A Miki K. Outer Body Experiences Posters, Tue, p.m., FC McKay C. P. Print Only: Astrobiology Mikouchi T. Print Only: Meteorites McKay C. P. Recent Water on Mars, Thu, p.m., Salon B Mikouchi T. Carbonaceous Chondrites Posters, Tue, p.m., FC McKay C. P. Astrobiology: New Detectives, Fri, a.m., Salon A Mikouchi T. Martian Meteorites, Wed, a.m., Marina Plaza McKay D. Astrobiology Posters, Thu, p.m., FC Mikouchi T. * Martian Meteorites, Wed, a.m. Marina Plaza McKay D. S. Print Only: Astrobiology Mikouchi T. Basaltic Achondrites, Thu, a.m., Marina Plaza McKay D. S. Space Weather, Mon, p.m., Salon A Mikouchi T. Martian Meteorites Posters, Thu, p.m. FC McKay D. S. Moon and Mercury Posters, Tue, p.m., FC Mikouchi T. Asteroids and Comets Posters, Thu, p.m., FC McKay D. S. Mars Alteration Posters, Tue, p.m., FC MilamK. Meteoritic Potpourri Posters, Tue, p.m, FC McKay D. S. Martian Meteorites Posters, Thu, p.m., FC MilamK. A. Print Only: Mars McKay D. S. Astrobiology: New Detectives, Fri, a.m., Salon A MilamK. A.* Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B McKay D. S. Mars Geology, Fri, a.m., Salon B MilazzoM. Outer Body Experiences Posters, Tue, p.m., FC McKay G. Martian Meteorites, Wed, a.m., Marina Plaza MilazzoM. Mars Geomorphology, Wed, p.m. Salon B McKay G.* Martian Meteorites, Wed, a.m., Marina Plaza Milazzo M. P. Red Hot Lava Posters, Tue, p.m., FC McKay G. A. Evolution of the Martian Interior, Wed, p.m., Salon C Milazzo M. P. Io and Beyond, Wed, a.m., Salon A McKay G. A. Mars Terrestial Analogs Posters, Thu, p.m. FC Milkovich S. M. Mars Bipolar Syndrome Posters, Thu, p.m., FC McKay G. A. Astrobiology: New Detectives, Fri, a.m., Salon A MillarJ. D. Chicxulub Posters, Tue, p.m., FC McKeegan K. D. The Wrath of Khandrules, Mon, a.m., Marina Plaza Miller D. Astrobiology Posters, Thu, p.m., FC McKinney G. W. Mars Odyssey Posters, Tue, p.m., FC Miller D.P. Education and Public Outreach Posters, Thu, p.m., FC McKinnon W. B. Outer Body Experiences Posters, Tue, p.m., FC MillerK. L Lunar Remote Sensing Posters, Thu, p.m., FC McKinnon W. B. Io and Beyond, Wed, a.m., Salon A MillerS. Mars Instruments Posters, Thu, p.m., FC McKinnon W. B.* Io and Beyond, Wed, a.m. Salon A MillerS. A.* CA!s, Fri, a.m., Marina Plaza McLeish E. R. Achondrites Posters, Thu, p.m., FC Milliken R. E.* Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B McLennan S. M. Mars Alteration Posters, Tue, p.m., FC Milliken R. E. Mars Geology, Fri, a.m., Salon B McLennan S. M. * Evolution of the Martian Interior, Wed, p.m., Salon C MingD. W. Print Only: Mars McLennan S. M. Mars Geology, Fri, a.m. Salon B MingD. W. Mars Alteration Posters, Tue, p.m., FC McLoughlin N. Astrobiology: New Detectives, Fri, a.m. Salon A MingD. W. Mars Terrestial Analogs Posters, Thu, p.m., FC McNamara K. M. Astrobiology: New Detectives, Fri, a.m., Salon A MingD. W. Martian Meteorites Posters, Thu, p.m. FC McSween H. Y. Asteroids and Comets, Wed, a.m., Salon C MingD. W.* Astrobiology: New Detectives, Fri. a.m. Salon A McSween H. Y. Jr. Print Only: Mars MingramB. Chicxulub Posters, Tue, p.m., FC McSween H. Y. Jr. Mars Odyssey, Mon, a.m., Salon B MirtittiM.E. Mars Surface Posters, Tue, p.m. FC McSween H. Y. Jr.* Mars Surface Composition, Tue, a.m., Salon B MirtittiM. E* Martian Meteorites, Wed, a.m., Marina Plaza McSween H. Y. Jr. Mars 2003 Rover/Spectral Stodies, Tue, p.m., Salon B Misawa K. Martian Meteorites Posters, Thu, p.m., FC McSween H. Y. Jr. Mars Odyssey Posters, Tue, p.m., FC MischnaM. Recent Water on Mars, Thu, p.m., Salon B McSween H. Y. Jr. Mars Surface Posters, Tue, p.m. FC Misra A. K. Mars Instruments Posters, Thu, p.m., FC McSween H. Y. Jr. Chondrules Posters, Tue, p.m., FC Mitchell D. E. Print Only: Mars McSween H. Y. Jr. Martian Meteorites, Wed, a.m. Marina Plaza Mitchell K. L. * Mars Volcartism, Mon, p.m., Salon B McSween H. Y. Jr. Evolution of the Martian Interior, Wed, p.m., Salon C Mitchell K. L. Red Hot Lava Posters, Tue, p.m., FC McSween H. Y. Jr. Futore Mars and Asteroid Missions, Fri, a.m., Salon C Mitreikina O. B. Print Only: Meteorites Meadows V. S. Missions and Instruments Posters, Thu, p.m., FC MitriG. Outer Body Experiences Posters, Tue, p.m., FC MegeD. Print Only: Mars MitriG. Missions and Instruments Posters, Thu, p.m., FC MegeD. Mars Geomorphology Posters, Thu, p.m., FC MitriG. Astrobiology Posters, Thu, p.m., FC Mehall G. Mars Odyssey, Mon, a.m., Salon B Mitrofanov I. G.* Mars Odyssey, Mon, a.m., Salon B MehaliG.L Mars Odyssey Posters, Tue, p.m., FC Mitrofanov I. G. Mars Odyssey Posters, Tue, p.m., FC Meier A. Meteoritic Potpourri Posters, Tue, p.m., FC Mittlefehldt D. W. Achondrites Posters, Thu, p.m. FC MeierA.J. Asteroids and Comets, Wed, a.m., Salon C Miura H. Chondrules Posters, Tue, p.m. FC MellonM. Mars Odyssey, Mon, a.m., Salon B MiuraY.N. Terrestrial Planets Posters, Thu, p.m. FC MellonM. T. Mars 2003 Rover/Spectral Stodies, Tue, p.m., Salon B Miyachi T. Lunar Remote Sensing Posters, Thu, p.m. FC MellonM. T. Mars Odyssey Posters, Tue, p.m., FC Miyamoto H. Print Only: Mars MellonM. T* Recent Water on Mars, Thu, p.m. Salon B Miyamoto H. Mars Volcartism, Mon, p.m., Salon B MellonM. T. Astrobiology: New Detectives, Fri, a.m. Salon A Miyamoto H. Mars Wet and Wild Posters, Thu, p.m. FC Melosh H. J. Poking Holes, Mon, a.m. Salon C MiyamotoM. Print Only: Meteorites Melosh H. J* Poking Holes, Mon, a.m. Salon C MiyamotoM. Carbonaceous Chondrites Posters, Tue, p.m., FC MeloshH. J. Digging Deeper, Tue, a.m., Salon C MiyamotoM. Martian Meteorites, Wed, a.m., Marina Plaza MeloshH. J. Poking Holes Posters, Tue, p.m. FC MiyamotoM. Martian Meteorites Posters, Thu, p.m, FC MeloshH. J. Mars Geomorphology Posters, Thu, p.m., FC MiyamotoM. Asteroids and Comets Posters, Thu, p.m., FC Mendybaev R. A. CAis, Fri, a.m. Marina Plaza Miyasaka S. Carbonaceous Chondrites Posters, Tue, p.m., FC Mendybaev R. A.* CAis, Fri, a.m. Marina Plaza Mizser A. Print Only: Astrobiology Menzies O. N. Carbonaceous Chondrites Posters, Tue, p.m., FC MizunoT. CAls Posters, Thu, p.m. FC Merchel S. CAls Posters, Thu, p.m. FC MizutartiH. Lunar Remote Sensing Posters, Thu, p.m., FC MerlineW. J. Mars Impacts Posters, Thu, p.m. FC Moersch J. E. Print Only: Mars Mertzman S. A. Print Only: Mars Moersch J. E. Mars Odyssey, Mon. a.m., Salon B Mertzman S. A. Mars Surface Composition, Tue, a.m, Salon B Moersch J. E. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Mertzman S. A. Astrobiology: New Detectives, Fri, a.m. Salon A Moersch J. E. Mars Odyssey Posters, Tue, p.m., FC MeshikA. P. Print Only: Meteorites Moersch J. E. Mars Surface Posters, Tue, p.m., FC Meshik A. P. Carbonaceous Chondrites, Tue, a.m., Marina Plaza Mohapatra R. K. Ordinary Chondrites Posters, Thu, p.m., FC Messenger S. Presolar Grains, Thu, p.m., Marina Plaza Mohapatra R. K. Martian Meteorites Posters, Thu, p.m., FC Messenger S. * Presolar Grains, Thu, p.m., Marina Plaza MolineuxA. EIPO Demonstrations, Sun, p.m. LPI Messenger S. R. Presolar Grains, Thu, p.m., Marina Plaza MollerL. E. Mars Instruments Posters, Thu, p.m., FC MestS. C. Mars Geologic Mapping Posters, Tue, p.m., FC MolrtiaB. Cold and Windy on Mars, Wed, a.m, Salon B MestS. C. Mars Geology, Fri, a.m, Salon B Moister F. J. Interplanetary Dust Posters, Thu, p.m. FC Metzger S. M. Mars Terrestial Analogs Posters, Thu, p.m., FC MonM.J. Print Only: Small Bodies Meyer B.S.* Nucleosynthesis, Mon, p.m., Marina Plaza MonM.J. Education and Public Outreach Posters, Thu, p.m., FC Meyer C. Cold and Windy on Mars, Wed, a.m., Salon B MonkawaA. Print Only: Meteorites MeyersM. Ordinary Chondrites, Thu, p.m. Salon A MonkawaA. Martian Meteorites, Wed, a.m., Marina Plaza Michael G. G. Mars Missions Posters, Thu, p.m., FC MonkawaA.* Martian Meteorites, Wed, a.m. Marina Plaza Michalski J. R. Mars Surface Composition, Tue, a.m., Salon B MonkawaA. Martian Meteorites Posters, Thu, p.m. FC MichotL J. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Montoya I. Print Only: Education Midgley P. A. Astrobiology: New Detectives, Fri, a.m. Salon A Moore C. Outer Body Experiences Posters, Tue, p.m., FC MihD. T. Missions and Instruments, Thu, a.m., Salon A MooreJ. M. Moving and Grooving Ice, Tue, a.m. Salon A

166 34th LPSC Program Index MooreJ. M. Io and Beyond, Wed, a.m., Salon A Nazarov M. A. Ordinary Chondrites Posters, Thu, p.m., FC Moore J. M* Mars Geology, Fri, a.m., Salon B Nazarov M. A. Achondrites Posters, Thu, p.m, FC Moore K R. Mars Odyssey Posters, Tue, p.m., FC Neal C. Lunar Basalts, Mon, a.m, Salon A MooreS. R.* Ordinary Chondrites, Thu, p.m., Salon A Neal C. R* Lunar Science, Tue, p.m., Salon A Moreels P. Venus, Thu, a.m., Salon A Neal C. R. Moon and Mercury Posters, Tue, p.m., FC MorganJ. K Mars Volcanism, Mon, p.m., Salon B Nealson K. H. Mars Odyssey, Man, a.m., Salon B MorganJ. K Red Hot Lava Posters, Tue, p.m., FC Nehru C. E* Achondrites, Wed, p.m., Marina Plaza Morgan J. V. Chicxulub Scientifc Drilling, Mon, p.m., Salon C NelmanM. Print Only: Astrobiology MorganM. L. Martian Meteorites Posters, Thu, p.m., FC Nelson E. Mars Atmosphere Posters, Tue, p.m., FC Morgan Z. T* Lunar Basalts, Mon, a.m., Salon A Nelson M. J. Mars Alteration Posters, Tue, p.m., FC Morishita Y. Achondrites, Wed, p.m., Marina Plaza NelsonR. M. Lunar Remote Sensing Posters, Thu, p.m., FC Moriwaki K Print Only: Origins Nemtchinov L Mars Geomorphology, Wed, p.m., Salon B Moroz L. V. Print Only: Small Bodies Nettles J. Meteoritic Potpourri Posters, Tue, p.m., FC Morphew M. Astrobiology: New Detectives, Fri, a.m., Salon A Nettles J. W. Chondrules Posters, Tue, p.m., FC Morris A. P. Print Only: Mars Neugebauer M. Missions and Instruments, Thu, a.m, Salon A Morris P. A. Print Only: Astrobiology NeukumG. Moon and Mercury Posters, Tue, p.m, FC Morris R. L. Mars Missions Posters, Thu, p.m., FC Neukum G. Asteroids and Comets, Wed, a.m., Salon C Morris R V. Print Only: Mars NeukumG. Mars Geomorphology, Wed, p.m, Salon B MorrisR V. Mars Surface Composition, Tue, a.m., Salon B NeukumG. Future Mars and Asteroid Missions, Fri, a.m., Salon C Morris R v• Mars Surface Composition, Tue, a.m., Salon B Neumann G. Print Only: Missions and Instruments MorrisR. V. Moon and Mercury Posters, Tue, p.m., FC Neumann G. A. Maps 'n Bits Posters, Tue, p.m., FC MorrisR V. Mars Surface Posters, Tue, p.m., FC Neumann G. A. Cold and Windy on Mars, Wed, a.m., Salon B Morris R V. Mars Alteration Posters, Tue, p.m., FC Newsom H. E. Mars Alteration Posters, Tue, p.m., FC MorrisR V. Mars Missions Posters, Thu, p.m, FC Newsom H. E.* Mars Geomorphology, Wed, p.m., Salon B MorrisR V. Astrobiology: New Detectives, Fri, a.m., Salon A Newsom H. E. Education and Public Outreach Posters, Thu, p.m., FC Morris R. V. Future Mars and Asteroid Missions, Fri, a.m., Salon C NewvilleM. Meteoritic Potpourri Posters, Tue, p.m., FC Morton-Bermea O. Chicxulub Scientifc Drilling, Man, p.m., Salon C Nezic z. Print Only: Mars Mosegaard K Lunar Geophysics Posters, Thu, p.m., FC Nezic Z. Mars Impacts Posters, Thu, p.m., FC Moses J I. Print Only: Outer Planets NgT. C.* Future Mars and Asteroid Missions, Fri, a.m., Salon C Moskowitz B. M. Astrobiology: New Detectives, Fri, a.m., Salon A NgoH.H. Basaltic Achondrites, Thu, a.m., Marina Plaza Mosqueira I. Origins of Planetary Systems, Thu, a.m, Salon C NgoH. H. Evolution of the Early Earth, Thu, p.m., Salon C Mosqueira I. Origins of Planetary Systems Posters, Thu, p.m., FC Nguyen A.* Presolar Grains, Thu, p.m, Marina Plaza Mostefaoui S. Poking Holes, Man, a.m, Salon C Ni S. Poking Holes, Moo, a.m, Salon C Mostefaoui S. * Nucleosynthesis, Man, p.m, Marina Plaza Nicholson C. Poking Holes, Man, a.m., Salon C Mostefaoui S. Presolar Grains, Thu, p.m, Marina Plaza Nieto A. B. Print Only: Education Motazedian T. * Recent Water on Mars, Thu, p.m, Salon B Nikitushkina O. N. Print Only: Meteorites Mottola S. Asteroids and Comets, Wed, a.m., Salon C NimmoF* Moving and Grooving Ice, Tue, a.m., Salon A Mougiuis-Mark P. J. Red Hot Lava Posters, Tue, p.m, FC Nimmo F. Outer Body Experiences Posters, Tue, p.m, FC Mouginis-Mark P. J. Mars Wet and Wild, Thu, a.m., Salon B Nimmo F. Evolution of the Martian Interior, Wed, p.m, Salon C Mouginis-Mark P. J. Mars Impacts Posters, Thu, p.m., FC Nimmo F. Lunar Geophysics Posters, Thu, p.m., FC MuellerK Mars Tectonics/Geophysics Posters, Tue, p.m., FC Nishiizurni K. Ordinary Chondrites, Thu, p.m., Salon A Mukhopadhyay S* IDPs: Comets and Asteroids, Wed, p.m., Salon A Nishiizurni K. Ordinary Chondrites Posters, Thu, p.m., FC Mullane E. Chondrules Posters, Tue, p.m., FC Nishiizurni K. Achondrites Posters, Thu, p.m., FC MullerR. A. Moon and Mercury Posters, Tue, p.m., FC NittlerL. R. IDPs: Comets and Asteroids, Wed, p.m, Salon A Murbach M. S. Print Only: Astrobiology NittlerL. R. Presolar Grains, Thu, p.m, Marina Plaza Murbach M. S. Astrobiology: New Detectives, Fri, a.m., Salon A Nittler L. R. * Presolar Grains, Thu, p.m, Marina Plaza Murchie S. L. Asteroids and Comets, Wed, a.m, Salon C Noble S. K Print Only: Moon MurphyW. Mars Geomorphology Posters, Thu, p.m., FC Noble S. K* Space Weather, Man, p.m, Salon A Murray J. Chondrules Posters, Tue, p.m, FC Noguchi T. Print Only: Asteroidal and Cometary Dust MurrayK. Mars Odyssey, Man, a.m., Salon B Nohda S. Carbonaceous Chondrites, Tue, a.m, Marina Plaza Murray K. C. Mars Odyssey Posters, Tue, p.m., FC NolanM. Lunar Remote Sensing Posters, Thu, p.m., FC MurrayS. S. Maps 'n Bits Posters, Tue, p.m., FC Nollett K. Presolar Grains, Thu, p.m, Marina Plaza Murrow D. Lunar Remote Sensing Posters, Thu, p.m, FC Norman M.D. Moon and Mercury Posters, Tue, p.m, FC Musselwhite D. S. * Evolution of the Martian Interior, Wed, p.m, Salon C Nowicki A. W. Mars Instruments Posters, Thu, p.m, FC Mustard J. F. Mars 2003 Rover/Spectral Studies, Tue, p.m, Salon B Ntaflos Th. Print Only: Impacts Mustard J. F. Mars Odyssey Posters, Tue, p.m., FC Nunes A. A. Print Only: Impacts Mustard J. F. Mars Missions Posters, Thu, p.m., FC Nunes A. A. Poking Holes Posters, Tue, p.m, FC Mustard J. F* Mars Geology, Fri, a.m., Salon B Nuiiez J. I. Education and Public Outreach Posters, Thu, p.m, FC NagaoK Martian Meteorites Posters, Thu, p.m., FC Nuth J. Evolution of the Early Earth, Thu, p.m, Salon C Nagasawa H. CAis Posters, Thu, p.m, FC NuthJ. A. ITI* Nucleosynthesis, Man, p.m, Marina Plaza Nakagawa Y. Print Only: Origins Nuth J. A. III Carbonaceous Chondrites Posters, Tue, p.m, FC Nakamoto T. Chondrules Posters, Tue, p.m, FC Nyquist L. Achondrites, Wed, p.m, Marina Plaza Nakamura A.M. Print Only: Small Bodies Nyquist L. E. Martian Meteorites, Wed, a.m., Marina Plaza Nakamura K* Carbonaceous Chondrites, Tue, a.m, Marina Plaza Nyquist L. E.* Basaltic Achondrites, Thu, a. m, Marina Plaza NakamuraK Moon and Mercury Posters, Tue, p.m, FC Nyquist L. E. Martian Meteorites Posters, Thu, p.m, FC NakamuraM. Mars Missions Posters, Thu, p.m, FC O'Brien D. P. Print Only: Small Bodies NakamuraN. Carbonaceous Chondrites, Tue, a.m., Marina Plaza O'Brien K. M. Evolution of the Early Earth, Thu, p.m, Salon C NakamuraR. Carbonaceous Chondrites Posters, Tue, p.m, FC Ocampo A. Poking Holes, Man, a.m, Salon C NakamuraR. Lunar Remote Sensing Posters, Thu, p.m., FC Ocampo A. C. Poking Holes Posters, Tue, p.m., FC Nakamura T. Print Only: Asteroidal and Cometary Dust Ocampo Friedmann R. Print Only: Astrobiology Nakamura T. Mars Atmosphere Posters, Tue, p.m., FC Ocampo Friedmann R. Astrobiology: New Detectives, Fri, a.m, Salon A Nakamura Y. Lunar Geophysics Posters, Thu, p.m, FC Odaka M. Mars Bipolar Syndrome Posters, Thu, p.m., FC NakanoT. The Wrath of Khandrules, Man, a.m., Marina Plaza O'Hara W. J. IV* Mars Wet and Wild, Thu, a.m, Salon B Nakashima S. Carbonaceous Chondrites, Tue, a.m, Marina Plaza Ohman T. Print Only: Impacts Nazarov M. A. Print Only: Meteorites Ohman T. Print Only: Mars Nazarov M. A. Print Only: Impacts OhmanT. Poking Holes Posters, Tue, p.m, FC Nazarov M. A. Space Weather, Mon, p.m, Salon A Ohno S. Digging Deeper, Tue, a.m, Salon C Nazarov M. A. Moon and Mercury Posters, Tue, p.m, FC Ohtake M. Moon and Mercury Posters, Tue, p.m., FC Nazarov M. A. Carbonaceous Chondrites Posters, Tue, p.m, FC Ohtake M. Lunar Remote Sensing Posters, Thu, p.m, FC Nazarov M. A. Basaltic Achondrites, Thu, a.m, Marina Plaza Ojala K Print Only: Impacts

34th LPSC Program Index------167 .Jkamoto K. Maps 'n Bits Posters, Tue, p.m., FC Petaev M. I. Carbonaceous Chondrites Posters, Tue, p.m., FC Okazaki R. Ordinary Chondrites Posters, Thu, p.m., FC PetaevM. I* Achondrites, Wed, p.m., Marina Plaza Okazaki R. Martian Meteorites Posters, Thu, p.m., FC Peterson C. A. Lunar Remote Sensing Posters, Thu, p.m., FC O'Keefe J* Chicxulub Scientifc Drilling, Mon, p.m., Salon C Petr V. Missions and Instruments Posters, Thu, p.m., FC Okubo C. H.* Mars Geophysics and Tectonics, Tue, p.m., Salon C Petr V. Future Mars and Asteroid Missions, Fri, a.m., Salon C Okubo C. H. MER 2003 Landing Sites Posters, Tue, p.m., FC Petro N. E. South Pole-Aitken Posters, Tue, p.m., FC Oleinik G. S. Print Only: Impacts Petrova T. L. Poking Holes Posters, Tue, p.m., FC Omelchenko V. v. Lunar Remote Sensing Posters, Thu, p.m., FC Petruny L. W. Poking Holes Posters, Tue, p.m., FC O'Neill H. St. C. Ordinary Chondrites, Thu, p.m., Salon A Peulvast J.P. Mars Bipolar Syndrome Posters, Thu, p.m., FC O'Neill H. St. C. Evolution of the Early Earth, Thu, p.m., Salon C Pfeffer M. A. IDPs: Comets and Asteroids, Wed, p.m., Salon A Opitz A. E!PO Demonstrations, Sun, p.m., LPI Phillips C. Outer Body Experiences Posters, Tue, p.m. FC Opitz A. Education and Public Outreach Posters, Thu, p.m., FC Phillips C. Io and Beyond, Wed, a.m. Salon A OriG.G* Mars Volcanism, Mon, p.m., Salon B Phillips C. B. Outer Body Experiences Posters, Tue, p.m., FC Orm!iJ. Print Only: Impacts Phillips M. L. F. Interplanetary Dust Posters, Thu, p.m., FC OrmoJ. Poking Holes Posters, Tue, p.m., FC Phillips R. J. Mars Geophysics and Tectonics, Tue, p.m. Salon C Orm!i J. Mars Terrestial Analogs Posters, Thu, p.m., FC Phillips R. J. Mars Wet and Wild, Thu, a.m., Salon B OrrK. W. Print Only: Origins PhoremanJ. Cold and Windy on Mars, Wed, a.m., Salon B Osinski G. R. * Poking Holes, Mon, a.m., Salon C Piatek J. L. Lunar Remote Sensing Posters, Thu, p.m. FC Osinski G. R. Astrobiology: New Detectives, Fri, a.m., Salon A Pickett D. Water on Mars Posters, Thu, p.m. FC Ostro S. J. Print Only: Missions and Instruments Pierazzo E. Mars Geophysics and Tectonics, Tue, p.m. Salon C Otsnki M. Lunar Science, Tue, p.m., Salon A Pierazzo E. Asteroids and Comets Posters, Thu, p.m., FC Ott U. Carbonaceous Chondrites Posters, Tue, p.m., FC Pierazzo E.* Astrobiology: New Detectives, Fri, a.m., Salon A Ott U. CAis Posters, Thu, p.m., FC Pierce T. L. Mars Geology, Fri. a.m., Salon B Ott U. Ordinary Chondrites Posters, Thu, p.m. FC Pierrehumbert R. T. Moving and Grooving Ice, Tue, a.m., Salon A Ott U. Martian Meteorites Posters, Thu, p.m. FC Pierrehumbert R. T. Outer Body Experiences Posters, Tue, p.m. FC Owada A. Moon and Mercury Posters, Tue, p.m. FC Pieters C. Moon and Mercury Posters, Tue, p.m. FC Owen T. Outer Body Experiences Posters, Tue, p.m., FC Pieters C. M. Print Only: Moon Ozima M. Terrestrial Planets Posters, Thu, p.m. FC Pieters C. M. Print Only: Small Bodies Paar G. Future Mars and Asteroid Missions, Fri. a.m.• Salon C Pieters C. M. SPA Sample Return, Mon, a.m. Salon A "ace K. R. Print Only: Venus Pieters C. M. * SPA Sample Return, Mon, a.m. Salon A ?ack A.* Ordinary Chondrites, Thu, p.m. Salon A Pieters C. M. Space Weather, Mon, p.m., Salon A Paige D. A. Cold and Windy on Mars, Wed, a.m., Salon B Pieters C. M. South Pole-Aitken Posters, Tue, p.m., FC i'aige D. A. Mars Instruments Posters, Thu, p.m. FC Pieters C. M. Moon and Mercnry Posters, Tue, p.m. FC PalmeR. Carbonaceous Chondrites, Tue, a.m. Marina Plaza Pieters C. M. Asteroids and Comets, Wed, a.m. Salon C PalmeR. Ordinary Chondrites, Thu, p.m., Salon A Pieters C. M. Lunar Remote Sensing Posters, Thu, p.m. FC PalmeR.* Evolution of the Early Earth, Thu, p.m., Salon C Pilkington M. Chicxulub Posters, Tue, p.m., FC PalmeR. Terrestrial Planets Posters, Thu. p.m. FC Pilkington M. Poking Holes Posters, Tue, p.m., FC PalmeR. Ordinary Chondrites Posters, Thu, p.m., FC Pillinger C. T. Print Only: Meteorites PalmeR. Martian Meteorites Posters, Thu, p.m. FC Pillinger C. T. Print Only: Mars Palmero A. Mars Wet and Wild Posters, Thu, p.m., FC Pillinger C. T. Ordinary Chondrites, Thu, p.m., Salon A Pandian J.D. Print Only: Education PilusoE. Poking Holes Posters, Tue, p.m., FC Papale P. Lunar Basalts, Mon, a.m. Salon A PinetP. Lunar Remote Sensing Posters, Thu, p.m. FC Papanastassiou D. A. Origins of Planetary Systems, Thu, a.m. Salon C PinetP. C. Print Only: Mars Papanastassiou D. A. Basaltic Achondrites, Thu, a.m. Marina Plaza PinetP. C. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Papanastassiou D. A.* Evolution of the Early Earth, Thu, p.m. Salon C PingJ. Lunar Geophysics Posters, Thu, p.m. FC Papike J. J. Print Only: Meteorites Pinkerton H. Red Hot Lava Posters, Tue, p.m., FC Papike J. J. SPA Sample Return, Mon, a.m., Salon A Pinsky L. Print Only: Mars Odyssey Papike J. J. Lunar Basalts, Mon, a.m. Salon A Pinsky L. Mars Odyssey, Mon, a.m. Salon B Papike J. J. Lunar Science, Tue, p.m., Salon A Pinsky L. Mars Odyssey Posters, Tue, p.m. FC l'apike J. J. Meteoritic Potpourri Posters, Tue, p.m. FC Pinsky L. S. Print Only: Moon >apike J. J. Terrestrial Planets Posters, Thu, p.m., FC Pitiss S. E. Mars Geomorphology Posters, Thu, p.m., FC ?apike J. J. Astrobiology Posters, Thu, p.m., FC Pizzarello S. * Carbonaceous Chondrites, Tue, p.m., Marina Plaza Pappalardo R. T. Moving and Grooving Ice, Tue, a.m., Salon A PlaggeM. Carbonaceous Chondrites Posters, Tue, p.m., FC Pappalardo R. T. * Moving and Grooving Ice, Tue, a.m., Salon A PlautJ. J.* Mars Odyssey, Mon. a.m., Salon B Pappalardo R. T. Outer Body Experiences Posters, Tue, p.m., FC Plaut J. J. Mars Impacts Posters, Thu, p.m., FC PaqueJ. M.* CA!s, Fri. a.m. Marina Plaza PlautJ. J. Mars Missions Posters, Thu, p.m. FC Park J. Martian Meteorites Posters, Thu, p.m. FC Plescia J. B.* Mars Geomorphology, Wed, p.m., Salon B ParkerT. Mars 2003 Rover/Spectral Studies, Tue, p.m.• Salon B PleskoC. Maps 'n Bits Posters, Tue, p.m., FC Parmentier E. M. Evolution of the Martian Interior, Wed, p.m., Salon C Pleva D. Print Only: Data Distribution Parnell J. Print Only: Astrobiology Plotnikova L. F. Print Only: Meteorites Parnell J. Astrobiology Posters, Thu, p.m., FC Podosek F. A. Terrestrial Planets Posters, Thu, p.m. FC Parnell J.* Astrobiology: New Detectives, Fri, a.m. Salon A Poitras son F.* Lunar Science, Tue, p.m. Salon A Paskonova E. A. Astrobiology Posters, Thu, p.m. FC PokaT. Print Only: Education Patchen A. Moon and Mercnry Posters, Tue, p.m., FC PolitA. T. Print Only: Mars Pathare A. V. Cold and Windy on Mars, Wed, a.m. Salon B Pomerantz W. J. Mars Bipolar Syndrome Posters, Thu, p.m., FC Pathare A. V.* Cold and Windy on Mars, Wed, a.m. Salon B PompeaS. M. EIPO Demonstrations, Sun, p.m., LPI Patterson G. W. Outer Body Experiences Posters, Tue, p.m. FC Pompei C. Missions and Instruments Posters, Thu, p.m., FC Patzer A. Ordinary Chondrites Posters, Thu, p.m. FC PopeK. O. Poking Holes Posters, Tue, p.m. FC Patzer A. Achondrites Posters, Thu, p.m., FC PopovV. S. Print Only: Moon Pearl J. C. Mars Atmosphere Posters, Tue, p.m., FC Popova O. Mars Geomorphology, Wed, p.m., Salon B Pearson M. J. Astrobiology: New Detectives, Fri, a.m., Salon A Porcelli D. Meteoritic Potpourri Posters, Tue, p.m., FC Pechernikova G. V. Print Only: Origins Poreda R. J.* Poking Holes, Mon, a.m., Salon C Peitersen M. N. Mars Volcanism, Mon. p.m., Salon B Poreda R. J. Evolution of the Early Earth, Thu, p.m., Salon C Peitersen M. N. Red Hot Lava Posters, Tue, p.m, FC Potts L. V. Lunar Geophysics Posters, Thu, p.m., FC PellinM. J. Presolar Grains, Thu, p.m., Marina Plaza Poulet F.* Mars Surface Composition, Tue, a.m., Salon B Pentecost A. Print Only: Astrobiology Poulet F. Mars Surface Posters, Tue, p.m., FC Perez L6pez R. Outer Body Experiences Posters, Tue, p.m., FC Povenrnire H. Print Only: Small Bodies Perry J. Outer Body Experiences Posters, Tue, p.m., FC Povenrnire K. I. Print Only: Small Bodies Petaev M. I. Print Only: Meteorites Prakapenka V. Terrestrial Planets Posters, Thu, p.m., FC PetaevM. I. The Wrath of Khandrules, Mon. a.m. Marina Plaza Prather E. E. EIPO Demonstrations, Sun, p.m., LPI

168 34th LPSC Program Index Pravdivtseva O. V. Print Only: Meteorites Richter F. M. * Origins of Planetary Systems, Thu, a.m., Salon C Pravdivtseva O. V* Carbonaceous Chondrites, Tue, a.m., Marina Plaza Richter F. M. CAis, Fri. a.m., Marina Plaza Pravec P. Asteroids and Comets, Wed, a.m., Salon C Richter L. Mars Instruments Posters, Thu, p.m., FC Presley M. A. Mars Geologic Mapping Posters, Tue, p.m., FC Rietmeijer F. J. M* IDPs: Comets and Asteroids, Wed, p.m., Salon A Presley M. A. Mars Wet and Wild Posters, Thu, p.m., FC Righter K.* Carbonaceous Chondrites, Tue, a.m., Marina Plaza Prettyman T. Mars Odyssey, Mon, a.m., Salon B Righter K. Rocks Made to Order Posters, Tue, p.m., FC Prettyman T. H. SPA Sample Return, Mon, a.m., Salon A RigneyM. P. Mars Impacts Posters, Thu, p.m., FC Prettyman T. H. Mars Odyssey, Mon, a.m., Salon B Rilee M. L. Missions and Instruments Posters, Thu, p.m., FC Prettyman T. H. Mars Odyssey Posters, Tue, p.m., FC RISE Group Lunar Geophysics Posters, Thu, p.m. FC Prettyman T. H. Asteroids and Comets, Wed, a.m., Salon C Rivkin A. S* Asteroids and Comets, Wed, a.m., Salon C Prettyman T. H. Mars Instruments Posters, Thu, p.m., FC Rivkin A. S. Asteroids and Comets Posters, Thu, p.m., FC Prieto Ballesteros O. Outer Body Experiences Posters, Tue, p.m., FC Rivoallan A. Mars Instruments Posters, Thu, p.m., FC Probst L. Astrobiology: New Detectives, Fri, a.m., Salon A Rivoallan A. Future Mars and Asteroid Missions, Fri, a.m., Salon C Prockter L. M. Outer Body Experiences Posters, Tue, p.m., FC RoarkJ. H. Mars Impacts Posters, Thu, p.m., FC Promprated P. Basaltic Achondrites, Thu, a.m., Marina Plaza RoarkJ. H. Education and Public Outreach Posters, Thu, p.m., FC Promprated P. Achondrites Posters, Thu, p.m., FC Robert F* Nucleosynlhesis, Mon, p.m., Marina Plaza Puccini S. Missions and Instruments Posters, Thu, p.m., FC Robert F. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Puchtell. S. Poking Holes Posters, Tue, p.m., FC Robert F. Rocks Made to Order Posters, Tue, p.m., FC Pugacheva S. G. Lunar Remote Sensing Posters, Thu, p.m., FC Robert F. Carbonaceous Chondrites Posters, Tue, p.m., FC PunA. Astrobiology Posters, Thu, p.m., FC Robert F. IDPs: Comets and Asteroids, Wed, p.m., Salon A Puskas z. Education and Public Outreach Posters, Thu, p.m., FC Robert F. Astrobiology: New Detectives, Fri, a.m., Salon A Putzig N. E.* Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Robert F. CAis, Fri, a.m., Marina Plaza QuinnM. EIPO Demonstrations, Sun, p.m., LPI Robin E.* Poking Holes, Mon, a.m., Salon C QuinnR. C. Mars Geology, Fri, a.m., Salon B Robin E. Digging Deeper, Tue, a.m., Salon C QuitteG. Poking Holes, Mon, a.m., Salon C Robinson M. S. Space Wealher, Mon, p.m., Salon A Radebaugh J. Outer Body Experiences Posters, Tue, p.m., FC Robinson M. S. Moon and Mercury Posters, Tue, p.m., FC Radebaugh J. Io and Beyond, Wed, a.m., Salon A Robinson M. S. Mars Surface Posters, Tue, p.m., FC Raitala J. Print Only: Impacts Robinson M. S. * Asteroids and Comets, Wed, a.m. Salon C Raitala J. Print Only: Mars Robinson M. S. Ordinary Chondrites, Thu, p.m., Salon A Raitala J. Poking Holes Posters, Tue, p.m., FC Robinson M. S. Lunar Remote Sensing Posters, Thu, p.m., FC Raitala J. Mars Geologic Mapping Posters, Tue, p.m., FC Robinson M. S. Mars Instruments Posters, Thu, p.m., FC Ramos C. Print Only: Data Distribution Robinson M. S. Asteroids and Comets Posters, Thu, p.m., FC RamseyM. S. Mars Surface Composition, Tue, a.m., Salon B Rocchia R. Poking Holes, Mon, a.m., Salon C RaoM.N. Mars Alteration Posters, Tue, p.m., Fe RocherP. Asteroids and Comets Posters, Thu, p.m. FC RatcliffJ. T. Lunar Geophysics Posters, Thu, p.m., FC Rochette P. Mars Geophysics and Tectonics, Tue, p.m. Salon C Raihbun J. A. Outer Body Experiences Posters, Tue, p.m., FC Roddy D. J. Print Only: Impacts Ralhbun J. A.* Io and Beyond, Wed, a.m., Salon A Roden J. Print Only: Mars RavineM. Mars Odyssey, Mon, a.m., Salon B Rodger A. P. Lunar Remote Sensing Posters, Thu, p.m., FC Rawling E. J. Red Hot Lava Posters, Tue, p.m., FC Rodionova J. F. Mars Missions Posters, Thu, p.m., FC Raymond C. A. Asteroids and Comets, Wed, a.m., Salon C Rodriguez Pascua M. A. Outer Body Experiences Posters, Tue, p.m., FC Razafitianamaharavo A. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Rogers D.* Mars Odyssey, Mon. a.m., Salon B Reach W. T. Asteroids and Comets, Wed, a.m., Salon C RogersN. W. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Rebolledo-Vieyra M. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Rohner U. Missions and Instruments, Thu, a.m., Salon A Redding B. MER 2003 Landing Sites Posters, Tue, p.m., FC Rojas J. Print Only: Data Distribution Redding B. Lunar Remote Sensing Posters, Thu, p.m., FC RollogM. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Redding B. L. Maps 'n Bits Posters, Tue, p.m. FC RomanM. J. Education and Public Outreach Posters, Thu, p.m., FC Redmond H. L. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Romanek C. S. Astrobiology: New Detectives, Fri, a.m., Salon A Reedy R. Mars Odyssey, Mon, a.m. Salon B Romeo!. Venus Posters, Thu, p.m., FC Reedy R. C.* Mars Odyssey, Mon, a.m., Salon B Rosenshein E. B. Print Only: Mars Reedy R. C. Mars Odyssey Posters, Tue, p.m., FC Roshchina I. A. Print Only: Small Bodies Reedy R. C. Outer Body Experiences Posters, Tue, p.m. FC RosiekM. R. Maps 'n Bits Posters, Tue, p.m. FC Reedy R. C. Achondrites Posters, Thu, p.m., FC RosingM. Basaltic Achondrites, Thu, a.m., Marina Plaza Reese C. C. Mars Impacts Posters, Thu, p.m. FC RosingM. Evolution of !he Early Earth, Thu, p.m. Salon C Rehkamper M. Meteoritic Potpourri Posters, Tue, p.m., FC Ross A. Print Only: Data Distribution RehmE. K. Nucleosynlhesis, Mon, p.m., Marina Plaza RossiA.P. Poking Holes Posters, Tue, p.m., FC Reimold W. U. Poking Holes, Mon, a.m., Salon C Rossi A. P. Mars Missions Posters, Thu, p.m., FC Reimold W. U. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Rotenberg E. Chondrules Posters, Tue, p.m., FC ReimoldW. U. Poking Holes Posters, Tue, p.m., FC Rolhery D. A. Print Only: Mars Reinert R. Print Only: Missions and Instruments Rolhstein D. M. Print Only: Education Reinert R. Missions and Instruments Posters, Thu, p.m., FC RouxelO. Nucleosynlhesis, Mon, p.m. Marina Plaza Reisherg L. Nucleosynlhesis, Mon, p.m., Marina Plaza Rouzaud J.-N. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Reiss D.* Recent Water on Mars, Thu, p.m., Salon B Rubie D. C. Evolution of !he Early Earlh, Thu, p.m., Salon C RemusatL. Carbonaceous Chondrites Posters, Tue, p.m., FC RubinA. E. The Wralh of Khandrules, Mon, a.m., Marina Plaza RenneP. R. Moon and Mercury Posters, Tue, p.m., FC Rubin A. E.* Ordinary Chondrites, Thu, p.m., Salon A Reyes-Salas M. Chicxulub Scientifc Drilling, Mon, p.m. Salon C RubinA. E. Ordinary Chondrites Posters, Thu, p.m., FC Reynaud C. CAis Posters, Thu, p.m., FC Rucker D. Print Only: Mars Rice J. W. Mars Volcanism, Mon, p.m., Salon B Rudnick R. L. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Rice J. W. Red Hot Lava Posters, Tue, p.m., FC RuffS. W. Mars Odyssey, Mon, a.m., Salon B Rice J. W. Jr. Mars Odyssey, Mon, a.m., Salon B RuffS. W.* Mars Surface Composition, Tue, a.m., Salon B Rice J. W. Jr.* Mars Wet and Wild, Thu, a.m., Salon B RuffS. W. Mars Surface Posters, Tue, p.m., FC Rice J. W. Jr. Mars Bipolar Syndrome Posters, Thu, p.m., FC RuffS. W. Mars Geologic Mapping Posters, Tue, p.m., FC Richardson D. C. Asteroids and Comets, Wed, a.m., Salon C RuffS. W. Mars Wet and Wild, Thu, a.m., Salon B Richardson J. E.* Digging Deeper, Tue, a.m., Salon C RugelG. CAis Posters, Thu, p.m., FC Richardson M. Future Mars and Asteroid Missions, Fri, a.m., Salon C RugelG. Ordinary Chondrites Posters, Thu, p.m., FC Richardson M. I. Mars Odyssey, Mon, a.m., Salon B Ruiterkamp R. Mars Geology, Fri, a.m., Salon B Richardson M. I. Cold and Windy on Mars, Wed, a.m., Salon B Ruiz J. Print Only: Mars Richardson M. I.* Recent Water on Mars, Thu, p.m., Salon B Ruiz J. Outer Body Experiences Posters, Tue, p.m., FC Richie J. Lunar Remote Sensing Posters, Thu, p.m., FC RuizJ. Mars Wet and Wild, Thu, a.m., Salon B Richmond N.C. Mars Geophysics and Tectonics, Tue, p.m., Salon C RumbleD. ill Basaltic Achondrites, Thu, a.m., Marina Plaza Richmond N. C. Mars Tectonics/Geophysics Posters, Tue, p.m., FC RumbleD. ill Achondrites Posters, Thu, p.m., FC

34th LPSC Program Index ------169 'lumble D. Ill CAJs, Fri, a.m., Marina Plaza Schmitt R. T. Chicxulub Scientifc Drilling, Mon, p.m., Salon C ;,ushmerT* Evolution of the Early Earth, Thu, p.m., Salon C SchmittR. T. Chicxulub Posters, Tue, p.m., FC 'ushmer T. Terrestrial Planets Posters, Thu, p.m., FC Schmitz B. Meteoritic Potpourri Posters, Tue, p.m., FC :lussel S. S. CAis, Fri. a.m., Marina Plaza Schneider D. M. Meteoritic Potpourri Posters, Tue, p.m., FC Russell A. J. Print Only: Mars Schoenbeck T. W. * Carbonaceous Chondrites, Tue, a.m., Marina Plaza Russell C. T* Asteroids and Cornets, Wed, a.m., Salon C SchOnbeck T. Ordinary Chondrites Posters, Thu, p.m., FC Russell P. S. Mars Geomorphology Posters, Thu, p.m., FC Schonberg S. Education and Pnblic Outreach Posters, Thu, p.m., FC RussellS. S. Carbonaceous Chondrites Posters, Tue, p.m., FC Schoonen M. A. A. Mars Alteration Posters, Tue, p.m., FC RussellS. S. Chondrules Posters, Tue, p.m., FC Schoonen M. A. A. Mars Geology, Fri, a.m., Salon B RussellS. S. CAis Posters, Thu, p.m., FC Schorghofer N. * Cold and Windy on Mars, Wed, a.m., Salon B Rutherford M. J. * Lunar Basalts, Mon, a.m., Salon A Schroeder R. D. MER 2003 Landing Sites Posters, Tue, p.m., FC Rutherford M. J. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Schubert G. Lunar Geophysics Posters, Thu, p.m., FC Rutherford M. J. Evolution of the Martian Interior, Wed, p.m., Salon C Schultz L. Ordinary Chondrites, Thu, p.m., Salon A Ruzicka A* The Wrath of Khandrules, Mon, a.m., Marina Plaza Schultz L. Ordinary Chondrites Posters, Thu, p.m., FC Sacks R. Astrobiology Posters, Thu, p.m., FC Schultz P. H. Digging Deeper, Tue, a.m., Salon C Safaeinili A. Print Only: Missions and Instruments Schultz P. H.* Digging Deeper, Tue, a.m., Salon C Safonova E. N. Astrobiology Posters, Thu, p.m., FC Schultz P. H. Poking Holes Posters, Tue, p.m., FC Saganti P. Print Only: Mars Odyssey Schultz P. H. Digging Deeper Posters, Tue, p.m., FC Saganti P. Mars Odyssey, Mon, a.m., Salon B Schultz P. H. Mars Geology, Fri, a.m., Salon B Saganti P. Mars Odyssey Posters, Tue, p.m., FC Schultz R. A. Print Only: Mars Saganti P. B. Mars Odyssey, Mon, a.m., Salon B Schultz R. A. Mars Geophysics and Tectonics, Tue, p.m., Salon C Sahijpal S. Print Only: Meteorites Schultz R. A. MER 2003 Landing Sites Posters, Tue, p.m., FC Saiki K. Lunar Science, Tue, p.m., Salon A Schultz R. A. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Saintonge A. Print Only: Education Schulz R. IDPs: Cornets and Asteroids, Wed, p.m., Salon A Sakai T. Print Only: Small Bodies Schwandt C. Achondrites, Wed, p.m., Marina Plaza Sakimoto S. E. H. Print Only: Mars Schwandt C. S. Astrobiology: New Detectives, Fri, a.m., Salon A Sakimoto S. E. H. Mars Volcanism, Mon, p.m., Salon B Schwartz J. M. Achondrites Posters, Thu, p.m., FC Sakimoto S. E. H.* Mars Volcanism, Mon, p.m., Salon B Schwenzer S. P. Martian Meteorites Posters, Thu, p.m., FC Sakimoto S. E. H. Education and Pnblic Outreach Posters, Thu, p.m., FC Schwocbert M. Future Mars and Asteroid Missions, Fri, a.m., Salon C Salamuniccar G. Print Only: Mars Science THEMIS Team Mars Odyssey, Mon, a.m., Salon B Salamuniccar G. Mars Wet and Wild Posters, Thu, p.m., FC ScottE.R. D* Mars Geophysics and Tectonics, Tue, p.m., Salon C Salamuniccar G. Mars Impacts Posters, Thu, p.m., FC Scott R. S. Moon and Mercury Posters, Tue, p.m., FC Salisbury J. W. Mars Surface Composition, Tue, a.m., Salon B Scott T. Print Only: Data Distribution Salle B. Print Only: Mars Seabrook A. M. Print Only: Mars Salle B. Mars Instruments Posters, Thu, p.m., FC Sears D. W. G. Print Only: Missions and Instrnments Salle B.* Future Mars and Asteroid Missions, Fri, a.m., Salon C Sears D. W. G. Space Weather, Mon, p.m., Salon A Sams C. Print Only: Astrobiology Sears D. W. G. Meteoritic Potpourri Posters, Tue, p.m., FC Samson C. Mars Instruments Posters, Thu, p.m., FC Sears D. W. G. Asteroids and Cornets, Wed, a.m., Salon C Sanchez G. Print Only: Chicxulub Sears D. W. G. Ordinary Chondrites, Thu, p.m., Salon A Sangely L. IDPs: Comets and Asteroids, Wed, p.m., Salon A Sears D. W. G. Recent Water on Mars, Thu, p.m., Salon B Saniger J. M. Astrobiology Posters, Thu, p.m., FC Sears D. W. G.* Future Mars and Asteroid Missions, Fri, a.m., Salon C Sanin A. B. Mars Odyssey, Mon, a.m., Salon B See T. H. Print Only: Meteorites Sanin A. B. Mars Odyssey Posters, Tue, p.m., FC Seelos F. P. IV* Mars Surface Composition, Tue, a.m., Salon B Sarid A. R.* Moving and Grooving Ice, Tue, a.m., Salon A Seelos F. P. IV MER 2003 Landing Sites Posters, Tue, p.m., FC Sarid A. R. Mars Impacts Posters, Thu, p.m., FC SeibertM. Print Only: Data Distribution Sarounova L. Asteroids and Comets, Wed, a.m., Salon C Sekiguchi T. Carbonaceous Chondrites Posters, Tue, p.m., FC SarrazinP. Missions and Instrnments Posters, Thu, p.m., FC Sekine T. Martian Meteorites, Wed, a.m., Marina Plaza Sasaki S. Print Only: Small Bodies Sekine Y. Astrobiology Posters, Thu, p.m., FC Sasaki S. Moon and Mercury Posters, Tue, p.m., FC SeloM. Print Only: Impacts Sasaki S. Mars Wet and Wild Posters, Thn, p.m., FC Sernenenko V. P. Ordinary Chondrites, Thu, p.m., Salon A Sasvari G. Print Only: Education Semjonova L. F. Print Only: Meteorites Saunders R. S. Mars Odyssey, Mon, a.m., Salon B Semjonova L. F. Print Only: Small Bodies Saunders R. S. Mars Odyssey Posters, Tue, p.m., FC Senft L. E. Venus Posters, Thu, p.m., FC Savasta K. J. Print Only: Mars SenshuH. Digging Deeper Posters, Tue, p.m., FC Savina M. R.* Presolar Grains, Thu, p.m., Marina Plaza Sephton M. A. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Scalice D. Education and Pnblic Outreach Posters, Thu, p.m., FC Sephton M. A.* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Schaefer L. Outer Body Experiences Posters, Tue, p.m., FC Serzhantov A. E. CAis Posters, Thu, p.m., FC Schaefer M. W. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Setoyanagi T. Basaltic Achondrites, Thu, a.m., Marina Plaza SchaeferM. W.* Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Setoyanagi T. Achondrites Posters, Thu, p.m., FC Schaefer M. W. * Future Mars and Asteroid Missions, Fri, a.m., Salon C Setyaeva I. V. Venus, Thu, a.m., Salon A Scharringhausen B. R. Print Only: Education Shalygin E. V. Print Only: Data Distribution Scbeeres D. J. Print Only: Missions and Instruments ShangS. Nucleosynthesis, Mon, p.m., Marina Plaza Scbeeres D. J. Missions and Instrnrnents Posters, Thu, p.m., FC SharmaM. Evolution of the Early Earth, Thu, p.m., Salon C Scheeres D. J. Future Mars and Asteroid Missions, Fri, a.m., Salon C Sharma S. K. Mars Jnstrnments Posters, Thu, p.m., FC Scheffziik C. Rocks Made to Order Posters, Tue, p.m., FC SharpT. Future Mars and Asteroid Missions, Fri, a.m., Salon C Scheible R. Astrobiology: New Detectives, Fri, a.m., Salon A Sharp T. G. Print Only: Meteorites Scheible R. T. Mars Geomorphology, Wed, p.m., Salon B Sharp T. G. Mars Surface Composition, Tue, a.m., Salon B ScbenkP. Moving and Grooving Ice, Tue, a.m., Salon A Sharp T. G. Carbonaceous Chondrites, Tue, a.m., Marina Plaza ScbenkP. M. Moving and Grooving Ice, Tue, a.m., Salon A Sharp T. G. Ordinary Chondrites, Thu, p.m., Salon A ScbenkP. M. Outer Body Experiences Posters, Tue, p.m., FC SharpT. G* Ordinary Chondrites, Thu, p.m., Salon A SchenkP. M. Jo and Beyond, Wed, a.m., Salon A Sharp T. G. Ordinary Chondrites Posters, Thu, p.m., FC ScbenkP. M.* Io and Beyond, Wed, a.m., Salon A Sharp T. G. Astrobiology: New Detectives, Fri, a.m., Salon A Scherbarth N. L. Print Only: Mars SharpZ. D. Achondrites, Wed, p.m., Marina Plaza ScberlerD. Poking Holes, Mon, a.m., Salon C Sharpton V. L. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Schieber J. Astrobiology Posters, Thu, p.m., FC Sharpton V. L. Poking Holes Posters, Tue, p.m., FC Schmidgall E. R. * Astrobiology: New Detectives, Fri, a.m., Salon A Sharpton V. L. Water on Mars Posters, Thu, p.m., FC Schmidt G. Terrestrial Planets Posters, Thu, p.m., FC Sharpton V. L. Mars Geomorphology Posters, Thu, p.m., FC Schmitt H. H. Print Only: Moon Sharpton V. L. Mars Impacts Posters, Thu, p.m., FC SchmittR. T Chicxulub Scientifc Drilling, Mon. p.m., Salon C Sharpton V. L. Education and Pnblic Outreach Posters, Thu, p.m., FC SchmittR. T. Poking Holes, Mon, a.m., Salon C Shean D. E. Print Only: Mars

170 34th LPSC Program Index Shean D. E.* Cold and Windy on Mars, Wed, a.m., Salon B Smith D. E. Mars Geophysics and Tectonics, Tue, p.m., Salon C Shearer C. K. Print Only: Meteorites Smith D. E. Mars Odyssey Posters, Tue, p.m., FC Shearer C. K. SPA Sample Return, Mon, a.m., Salon A Smith D. E. Maps 'n Bits Posters, Tue, p.m., FC Shearer C. K. Lunar Basalts, Mon, a.m., Salon A Smith D. E. Cold and Windy on Mars, Wed, a.m., Salon B Shearer C. K* Lunar Basalts, Mon, a.m., Salon A Smith D. E. Asteroids and Comets, Wed, a.m., Salon C Shearer C. K. Lunar Science, Tue, p.m., Salon A Smith D. E .. Mars Odyssey Posters, Tue, p.m., FC Shearer C. K. Moon and Mercury Posters, Tue, p.m., FC Smith D. L. Meteoritic Potpourri Posters, Tue, p.m., FC Shearer C. K. Meteoritic Potpourri Posters, Tue, p.m., FC Smith D. M. Mars Odyssey Posters, Tue, p.m., FC Shearer C. K. Evolution of the Martian Interior, Wed, p.m., Salon C Smith G. A. Lunar Science, Tue, p.m., Salon A Shearer C. K. Basaltic Achondrites, Thu, a.m., Marina Plaza Smith G. A. Lunar Remote Sensing Posters, Thu, p.m., FC Shearer C. K. Terrestrial Planets Posters, Thu, p.m., FC Smith J. B* Presolar Grains, Thu, p.m., Marina Plaza Shearer C. K. Achondrites Posters, Thu, p.m., FC Smith 1. R. Mars Volcanism, Mon, p.m., Salon B Shearer C. K. Astrobiology Posters, Thu, p.m, FC Smith M.D. Mars Odyssey, Mon. a.m., Salon B Shearer P. M. Lunar Geophysics Posters, Thu, p.m, FC SmithM. D. Mars Atmosphere Posters, Tue, p.m., FC Sheffer A. A. Poking Holes Posters, Tue, p.m., FC Smith M.D. Mars Bipolar Syndrome Posters, Thu, p.m., FC ShelleyM. Ordinary Chondrites, Thu, p.m, Salon A Smith P. H. Mars Missions Posters, Thu, p.m., FC ShenA. H. Poking Holes, Mon, a.m., Salon C Smith W. H. Mars Instruments Posters, Thu, p.m., FC Shepard M. K. Lunar Remote Sensing Posters, Thu, p.m, FC Smoliar M. I.* Ordinary Chondrites, Thu, p.m., Salon A Sheppard S. S. Asteroids and Comets, Wed, a.m., Salon C Smrekar S. E. Venus, Thu, a.m., Salon A Sherman D. M. Education and Public Outreach Posters, Thu, p.m., FC Smrekar S. E.* Venus, Thu, a.m., Salon A Sherrit S. Missions and Instruments Posters, Thu, p.m., FC Smrekar S. E. Venus Posters, Thu, p.m., FC Sherwood R. Missions and Instruments Posters, Thu, p.m., FC Smythe W. D. Outer Body Experiences Posters, Tue, p.m., FC Shestopalov D. I. Print Only: Small Bodies Smythe W. D. Io and Beyond, Wed, a.m., Salon A Shevchenko V. V. Lunar Remote Sensing Posters, Thu, p.m., FC Smythe W. D. Lunar Remote Sensing Posters, Thu, p.m., FC Shevchenko V. V. Mars Missions Posters, Thu, p.m., FC Snape C. E. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Shigeyoshi R. The Wrath of Khandrules, Mon, a.m., Marina Plaza Snead C. IDPs: Comets and Asteroids, Wed, p.m., Salon A Shih C. Achondrites, Wed, p.m., Marina Plaza Snead C. Interplanetary Dust Posters, Thu, p.m., FC Shih C. Y. Basaltic Achondrites, Thu, a.m., Marina Plaza Socki R. A. Mars Terrestial Analogs Posters, Thu, p.m., FC Shih C.-Y.* Martian Meteorites, Wed, a.m., Marina Plaza SockiR. A. Mars Geology, Fri, a.m., Salon B ShihC.-Y. Martian Meteorites Posters, Thu, p.m., FC Soderblom L. A. Outer Body Experiences Posters, Tue, p.m., FC Shimmin J. Astrobiology: New Detectives, Fri, a.m., Salon A Soderblom L. A.* Mars Geology, Fri, a.m., Salon B Shimada G.* Carbonaceous Chondrites, Tue, a.m., Marina Plaza Sohl-Dickstein 1. N. Future Mars and Asteroid Missions, Fri, a.m., Salon C ShimodaH. Achondrites, Wed, p.m., Marina Plaza Soler-Arechalde A.M. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Shinaman J. Lunar Remote Sensing Posters, Thu, p.m., FC Solomatov V. S. Mars Impacts Posters, Thu, p.m., FC Shingareva T. V. Print Only: Small Bodies Solomatov V. S. Astrobiology Posters, Thu, p.m., FC Shinohara C. Mars Odyssey, Mon. a.m., Salon B Solomon S. C. Mars Geophysics and Tectonics, Tue, p.m., Salon C Shinohara C. Mars Odyssey Posters, Tue, p.m., FC Solomon S. C.* Mars Geophysics and Tectonics, Tue, p.m., Salon C Shiomi K. Mars Missions Posters, Thu, p.m., FC Soltesz T. Print Only: Venus Shiota D. Carbonaceous Chondrites, Tue, a.m., Marina Plaza Soni P. Print Only: Meteorites Shirono S. The Wrath of Khandrules, Mon. a.m., Marina Plaza SpaunN. A. Outer Body Experiences Posters, Tue, p.m., FC Shkuratov Y. G. Lunar Remote Sensing Posters, Thu, p.m., FC Spekkens K. Print Only: Education Shkuratov Yu. G. Moon and Mercury Posters, Tue, p.m., FC Spencer 1. lo and Beyond, Wed, a.m., Salon A Shock E. L. Carbonaceous Chondrites, Tue, p.m, Marina Plaza Spencer J. R. Outer Body Experiences Posters, Tue, p.m., FC Shockey K. M. Red Hot Lava Posters, Tue, p.m., FC Spencer 1. R. lo and Beyond, Wed, a.m., Salon A Shockey K. M. Mars Geomorphology Posters, Thu, p.m., FC Spettel B. Terrestrial Planets Posters, Thu, p.m., FC Showman A. P. * Moving and Grooving Ice, Tue, a.m., Salon A Spettel B. Ordinary Chondrites Posters, Thu, p.m., FC Shu F. H. Nucleosynthesis, Mon, p.m., Marina Plaza Spettel B. Martian Meteorites Posters, Thu, p.m., FC ShuJ. Space Weather, Mon, p.m., Salon A Spray 1. Mars Instruments Posters, Thu, p.m., FC Shukolyukov A.* Origins of Planetary Systems, Thn, a.m., Salon C Spray 1. G. Poking Holes, Mon. a.m., Salon C Shuvalov V. Digging Deeper Posters, Tue, p.m., FC Spray 1. G. Poking Holes Posters, Tue, p.m., FC Shuvalov V. V. Print Only: Impacts Springob C. M. Print Only: Education Shuvalov V. V. Digging Deeper Posters, Tue, p.m., FC Spudis P. D. Lunar Science, Tue, p.m., Salon A SikA. EIPO Demonstrations, Sun, p.m., LPI Spudis P. D. South Pole-Aitken Posters, Tue, p.m., FC Sik A. Education and Public Outreach Posters, Thu, p.m., FC Spudis P. D. Lunar Remote Sensing Posters, Thu, p.m., FC Simionovici A. S. Poking Holes, Mon, a.m., Salon C Squyres S. Mars Odyssey, Mon, a.m., Salon B SimmonsJ. Education and Public Outreach Posters, Thu, p.m., FC Squyres S. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B SimonS. B.* CA!s, Fri, a.m., Marina Plaza Squyres S. W. Mars Odyssey Posters, Tue, p.m., FC Simpson R. A. Print Only: Mars Squyres S. W. Future Mars and Asteroid Missions, Fri, a.m., Salon C Sims D. W. Print Only: Mars Srinivasan G. CAis, Fri, a.m., Marina Plaza Sims D. W. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Stadermann F. J. IDPs: Comets and Asteroids, Wed, p.m, Salon A SimsM. R. Print Only: Mars Stadermann F. 1. Presolar Grains, Thu, p.m., Marina Plaza SimsM.R. Future Mars and Asteroid Missions, Fri, a.m., Salon C Stadermann F. 1.* Presolar Grains, Thu, p.m., Marina Plaza SingerS. F. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Staid M. I. Moon and Mercury Posters, Tue, p.m., FC Singler C. R. Education and Public Outreach Posters, Thu, p.m., FC Staid M. I. Mars Surface Posters, Tue, p.m., FC Singletary S. J. Print Only: Meteorites StaidM. I. Lunar Remote Sensing Posters, Thu, p.m., FC Singletary S. J. Achondrites, Wed, p.m., Marina Plaza Stakheev Yu. I. Print Only: Meteorites Singletary S. 1.* Achondrites, Wed, p.m., Marina Plaza Stankevich D. G. Lunar Remote Sensing Posters, Thu, p.m., FC Sipiera P. P. Ordinary Chondrites Posters, Thu, p.m., FC Stansberry 1. Missions and Instruments Posters, Thu, p.m., FC SiretD.* Digging Deeper, Tue, a.m., Salon C Stansbery G. Asteroids and Comets Posters, Thu, p.m., FC Sisterson J. M. Lunar Remote Sensing Posters, Thu, p.m., FC StarrR. Mars Odyssey, Mon, a.m., Salon B Skilling I. P. Red Hot Lava Posters, Tue, p.m., FC Starukhina L. V. Moon and Mercury Posters, Tue, p.m., FC Skinner J. A. Mars Geologic Mapping Posters, Tue, p.m., FC SteelS. 1. EIPO Demonstrations, Sun, p.m., LPI Skinner J. A. Jr. Print Only: Mars Steele A. Astrobiology: New Detectives, Fri, a.m., Salon A Skinner J. A. Jr. Mars Geologic Mapping Posters, Tue, p.m., FC Stefanick M. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Skinner J. A. Jr. Mars Geomorphology, Wed, p.m., Salon B Stegman D. R. Mars Impacts Posters, Thu, p.m., FC Skrzypczak A. Astrobiology: New Detectives, Fri, a.m., Salon A Stehlik H. Poking Holes Posters, Tue, p.m., FC Slater T. F. EIPO Demonstrations, Sun, p.m., LPI SteinT. C. Mars Missions Posters, Thu, p.m., FC Slater V. P. Meteoritic Potpourri Posters, Tue, p.m, FC Steinberg B. Mars Odyssey Posters, Tue, p.m., FC Slavney S. Mars Odyssey Posters, Tue, p.m, FC Steinberg J. T. Missions and Instruments, Thu, a.m., Salon A Smellie J. L. Red Hot Lava Posters, Tue, p.m., FC Stempel M. M. Outer Body Experiences Posters, Tue, p.m., FC

34th LPSC Program Index 171 Stephan K. Moving and Grooving Ice, Tue, a.m., Salon A Takeda H.* Lunar Science, Tue, p.m., Salon A Stephan K.* Moving and Grooving Ice, Tue, a.m., Salon A Takeda H. Moon and Mercury Posters, Tue, p.m., FC Stephan T.* IDPs: Comets and Asteroids, Wed, p.m., Salon A Takeda H. Achondrites, Wed, p.m., Marina Plaza Stephan T. Ordinary Chondrites, Thu, p.m., Salon A Takeda H. Lunar Remote Sensing Posters, Thu, p.m., FC Stepinski T. F. Mars Wet and Wild, Tbu, a.m., Salon B Takizawa Y. Mars Missions Posters, Thu, p.m., FC Stepinski T. F. Mars Wet and Wild Posters, Thu, p.m., FC Tambley C. Print Only: Astrobiology Stern R. CAis Posters, Thu, p.m., FC Tambley C. Astrobiology: New Detectives, Fri, a.m., Salon A SternS. A. lo and Beyond, Wed, a.m., Salon A Tamppari L. K. Mars Atmosphere Posters, Tue, p.m., FC SternS. A* lo and Beyond, Wed, a.m., Salon A Tamppari L. K. Io and Beyond, Wed, a.m., Salon A Steutei D* Mars Surface Composition, Tue, a.m., Salon B Tamppari L. K. Mars Bipolar Syndrome Posters, Thu, p.m., FC Steutel D. Lunar Science, Tue, p.m., Salon A Tanaka K. L. Print Only: Mars · Steutel D. Lunar Remote Sensing Posters, Thu, p.m., FC Tanaka K. L. MER 2003 Landing Sites Posters, Tue, p.m., FC Stevens T. Astrobiology Posters, Tbu, p.m., FC Tanaka K. L. Mars Geologic Mapping Posters, Tue, p.m., FC Stewart S. A Poking Holes, Mon, a.m., Salon C Tanaka K. L. Maps 'n Bits Posters, Tue, p.m., FC Stewart S. T* Digging Deeper, Tue, a.m., Salon C Tanaka K. L* Mars Geomorphology, Wed, p.m., Salon B Stewart S. T. Mars Impacts Posters, Thu, p.m., FC Tanaka K. L. T. Mars Geologic Mapping Posters, Tue, p.m., FC Stimpfl M. Rocks Made to Order Posters, Tue, p.m., FC Tanner L. H. Print Only: Mars Stocco K. Education and Public Outreach Posters, Thu, p.m., FC Taylor C. L. Mars Geology, Fri, a.m., Salon B Stockman S. Education and Public Outreach Posters, Thu, p.m., FC Taylor D.-H. Moon and Mercury Posters, Tue, p.m., FC Stockstill K. R. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Taylor G. J. Mars Odyssey, Mon, a.m., Salon B Stockstill K. R. Mars Surface Posters, Tue, p.m., FC Taylor G. J.* Mars Odyssey, Mon, a.m., Salon B Stockstill K. R. Meteoritic Potpourri Posters, Tue, p.m., FC Taylor G. J. Lunar Science, Tue, p.m., Salon A Stoddard P. R Venus Posters, Tbu, p.m., FC Taylor G. J. Mars Odyssey Posters, Tue, p.m., FC Stofan E. Red Hot Lava Posters, Tue, p.m., FC Taylor G. J. Lunar Remote Sensing Posters, Thu, p.m., FC Stofan E. R. Print Only: Venus Taylor G. J. Water on Mars Posters, Tbu, p.m., FC Stofan E. R. Red Hot Lava Posters, Tue, p.m., FC Taylor L.A. Space Weather, Mon, p.m., Salon A StofanE. R. Venus Posters, Thu, p.m., FC Taylor L.A. Lunar Science, Tue, p.m., Salon A Stoffler D. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Taylor L. A Moon and Mercury Posters, Tue, p.m., FC Sttlffler D.* Chicxulub Scientifc Drilling, Mon, p.m., Salon C Taylor L.A. Meteoritic Potpourri Posters, Tue, p.m., FC Stoffler D. Chicxulub Posters, Tue, p.m., FC Taylor L.A. Carbonaceous Chondrites Posters, Tue, p.m., FC SUiffler D. Poking Holes Posters, Tue, p.m., FC Taylor L. A Martian Meteorites, Wed, a.m., Marina Plaza Sttiffler D. Ordinary Chondrites Posters, Thu, p.m., FC TaylorL. A. Basaltic Achondrites, Tbu, a.m., Marina Plaza Stoffler D. Martian Meteorites Posters, Thu, p.m., FC Taylor L.A. Lunar Remote Sensing Posters, Thu, p.m., FC Stoker C. Mars Wet and Wild, Tbu, a.m., Salon B Taylor L.A. Achondrites Posters, Thu, p.m., FC Stoker C. R. Mars Instruments Posters, Tbu, p.m., FC Taylor P. Print Only: Asteroidal and Cometary Dust Stoker C. R. Astrobiology Posters, Tbu, p.m., FC Taylor S. Interplanetary Dust Posters, Tbu, p.m., FC Stooke P. J. Lunar Remote Sensing Posters, Thu, p.m., FC ten Kate I. L. * Mars Geology, Fri, a.m., Salon B Stopar J. D. Lunar Remote Sensing Posters, Thu, p.m., FC TengF-Z. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Stupar J.D. Mars Instruments Posters, Thu, p.m., FC Tepliczky I. Education and Public Outreach Posters, Thu, p.m., FC StoreyM. Evolution of the Early Earth, Thu, p.m., Salon C Tera F. Carbonaceous Chondrites, Tue, p.m., Marina Plaza StorzerD. Print Only: Impacts Terada H. Carbonaceous Chondrites Posters, Tue, p.m., FC Stough T. Print Only: Mars Terrell C. A. Astrobiology Posters, Tbu, p.m., FC Straniero O. Presolar Grains, Tbu, p.m., Marina Plaza Teutsch N. Lunar Science, Tue, p.m., Salon A Stroud R. M.* Presolar Grains, Tbu, p.m., Marina Plaza Tewksbury C. M. Venus Posters, Thu, p.m., FC Sture S. Digging Deeper, Tue, a.m., Salon C The L.-S. Nucleosynthesis, Mon, p.m., Marina Plaza Stiiwe J. A IDPs: Comets and Asteroids, Wed, p.m., Salon A The Curious Team Print Only: Education Sucharski R. Maps 'n Bits Posters, Tue, p.m., FC THEMIS Science Team Mars Odyssey Posters, Tue, p.m., FC Sudek Ch. Carbonaceous Chondrites Posters, Tue, p.m., FC THEMIS Science Team Mars Geomorphology, Wed, p.m., Salon B Sugihara T. Moon and Mercury Posters, Tue, p.m., FC Theriot M. Jr. Mars Odyssey, Mon, a.m., Salon B Sugihara T. Lunar Remote Sensing Posters, Thu, p.m., FC Thibodeaux C. J. Print Only: Mars Sugita S. Digging Deeper, Tue, a.m., Salon C Thibodeaux C. J. Mars Wet and Wild, Tbu, a.m., Salon B Sugita S.* Digging Deeper, Tue, a.m., Salon C Thibodeaux C. J. Mars Geomorphology Posters, Tbu, p.m., FC Sugita S. Venus Posters, Thu, p.m., FC ThiemensM. Future Mars and Asteroid Missions, Fri, a.m., Salon C Sugita S. Astrobiology Posters, Tbu, p.m., FC Thiemens M. H. Mars Missions Posters, Thu, p.m., FC Sugiura N. CAis Posters, Thu, p.m., FC Thiemens M. H. Astrobiology Posters, Tbu, p.m., FC Sutherland V. Mars Geomorphology, Wed, p.m., Salon B Thomas P. C. Space Weather, Mon, p.m., Salon A Sutherland V. Education and Public Outreach Posters, Thu, p.m., FC Thomas P. C. Asteroids and Comets, Wed, a.m., Salon C SuttonS. R. Meteoritic Potpourri Posters, Tue, p.m., FC Thomas-Keprta K. L. * Astrobiology: New Detectives, Fri, a.m., Salon A Suzuki Y. Maps 'n Bits Posters, Tue, p.m., FC Thompson C. K. Meteoritic Potpourri Posters, Tue, p.m., FC Swamy V. Poking Holes, Mon, a.m., Salon C ThompsonJ.* Recent Water on Mars, Thu, p.m., Salon B Swindle T. D. Lunar Science, Tue, p.m., Salon A Thompson M. E. Terrestrial Planets Posters, Tbu, p.m., FC Swindle T. D. Outer Body Experiences Posters, Tue, p.m., FC Thompson T. W. Mars Missions Posters, Thu, p.m., FC Swindle T. D. Mars Instruments Posters, Tbu, p.m., FC Thomson B. J.* Mars Geology, Fri, a.m., Salon B SykesM. V. Asteroids and Comets, Wed, a.m., Salon C Tbordarson T. Print Only: Mars Sylvester P. J. Tbe Wrath of Khandrules, Mon, a.m., Marina Plaza Tbordarson T. Red Hot Lava Posters, Tue, p.m., FC Symes S. J. K. Meteoritic Potpourri Posters, Tue, p.m., FC Tborsos I. E. Mars Geomorphology, Wed, p.m., Salon B Szalaruiny Gy. Education and Public Outreach Posters, Thu, p.m., FC TbuillotW. Asteroids and Comets Posters, Thu, p.m., FC Szathmary E. Astrobiology Posters, Tbu, p.m., FC Tissandier L. The Wrath of Khandrules, Mon, a.m., Marina Plaza Szymanski A Martian Meteorites Posters, Tbu, p.m., FC TitusT. N. Mars Odyssey, Mon, a.m., Salon B Tachibana S. * Nucleosynthesis, Mon, p.m., Marina Plaza Titus T. N. Mars Surface Posters, Tue, p.m., FC Tachibana S. Carbonaceous Chondrites, Tue, a.m., Marina Plaza Titus T. N. Mars Bipolar Syndrome Posters, Thu, p.m., FC Tachibana S. Chondrules Posters, Tue, p.m., FC Tobola K. W. EIPO Demonstrations, Sun, p.m., LPI Tachibana S. CAis Posters, Thu, p.m., FC Tobola K. W. Education and Public Outreach Posters, Thu, p.m., FC Tada R. Chicxulub Posters, Tue, p.m., FC Togashi S. Achondrites, Wed, p.m., Marina Plaza Tagle R.* Chicxulub Scientifc Drilling, Mon, p.m., Salon C ToigoA. D. Cold and Windy on Mars, Wed, a.m., Salon B Tagle R. Poking Holes Posters, Tue, p.m., FC Tokar R. L. Mars Odyssey Posters, Tue, p.m., FC Tajika E. Chicxulub Posters, Tue, p.m., FC Tolson R. Mars Odyssey, Mon, a.m., Salon B Tajika E. Mars Atmosphere Posters, Tue, p.m., FC Tomascak P. B. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Takaoka N. Print Only: Asteroidal and Cometary Dust TomitaN. Print Only: Small Bodies Takayama K. Mars Bipolar Syndrome Posters, Thu, p.m., FC Tonui E. K. Carbonaceous Chondrites Posters, Tue, p.m., FC

172 34th LPSC Program Index Tonui E. K.* Basaltic Achondrites, Tbu, a.m., Marina Plaza Vera-Sanchez P. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Toplis M. J. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Verchovsky A. Astrobiology Posters, Thu, p.m., FC Toporski J. Astrobiology: New Detectives, Fri, a.m., Salon A Verchovsky A. B. Print Only: Meteorites Toppani A. Rocks Made to Order Posters, Tue, p.m., FC Verchovsky A. B. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Toppani A. IDPs: Comets and Asteroids, Wed, p.m., Salon A Verish R. S. Print Only: Meteorites Tornabene L. L. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Verish R. S. Print Only: Impacts Tasca N.J.* Mars Geology, Fri. a.m. Salon B Veverka J. Asteroids and Cornets, Wed, a.m., Salon C Trafton L. Outer Body Experiences Posters, Tue, p.m., FC Vidal A. Mars Tectonics/Geophysics Posters, Tue, p.m., FC Trautner R. * Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Viera Martins R. Asteroids and Comets Posters, Thu, p.m., FC Trava-Airoldi V. J. Missions and Instruments Posters, Thu, p.m., FC Vilalta R. Mars Wet and Wild Posters, Thu, p.m., FC Travis B. J. Water on Mars Posters, Thu, p.m., FC Vilas F. Space Weather, Mon, p.m., Salon A Travis L. D. Io and Beyond, Wed, a.m., Salon A Vilas F. Outer Body Experiences Posters, Tue, p.m., FC Treiman A. Astrobiology: New Detectives, Fri, a.m., Salon A Vincent R. K. Print Only: Data Distribution Treiman A. H. Evolution of the Martian Interior, Wed, p.m., Salon C Vityazev A. V. Print Only: Origins Treiman A. H.* Evolution of the Martian Interior, Wed, p.m., Salon C VogelN. Print Only: Meteorites Treiman A. H. Achondrites Posters, Thu, p.m., FC von Frese R. R. B. Lunar Geophysics Posters, Thu, p.m., FC Trepmann C. A. Poking Holes Posters, Tue, p.m. FC Vors E. Mars Instruments Posters, Thu, p.m., FC Tret'yakov V.I. Mars Odyssey, Mon, a.m., Salon B Vors E. Future Mars and Asteroid Missions, Fri, a.m., Salon C Tretyakov V. Mars Odyssey Posters, Tue, p.m. FC Voss H.-P. Carbonaceous Chondrites, Tue, a.m., Marina Plaza TrieloffM. Basaltic Achondrites, Thu, a.m., Marina Plaza Wada K. Digging Deeper Posters, Tue, p.m. FC Trigo-Rodriguez J. M. Print Only: Small Bodies WadbwaM. Nucleosynthesis, Mon, p.m., Marina Plaza Trigwell S. Mars Instruments Posters, Thu, p.m., FC WadbwaM* Martian Meteorites, Wed, a.m., Marina Plaza Tripa C. E. Presolar Grains, Thu, p.m., Marina Plaza WadbwaM. Evolution of the Martian Interior, Wed, p.m., Salon C Trubetskaya I. A. Digging Deeper Posters, Tue, p.m., FC WadbwaM. Basaltic Achondrites, Thu, a.m., Marina Plaza Tsapin A. Missions and Instruments, Thu, a.m., Salon A Wadbwa M.* Basaltic Achondrites, Thu, a.m., Marina Plaza TsapinA.* Astrobiology: New Detectives, Fri, a.m., Salon A WadbwaM. Future Mars and Asteroid Missions, Fri, a.m., Salon C Tsikalas F. Print Only: Impacts WadbwaM. CA!s, Fri, a.m., Marina Plaza Tsuchiyama A.* The Wrath of Khandrules, Mon, a.m., Marina Plaza Wagner R. Moving and Grooving Ice, Tue, a.m., Salon A Tucbscberer M. G.* Chicxulub Scientifc Drilling, Moo, p.m., Salon C Wahr J. Outer Body Experiences Posters, Tue, p.m., FC Tuckwell G. W. Mars Geomorphology Posters, Thu, p.m., FC Waite J. H. Astrobiology Posters, Thu, p.m., FC TullerM. Mars Instruments Posters, Thu, p.m., FC Waiting D. J. Print Only: Mars TurnerR. Print Only: Mars Odyssey Waldron A. C. Venus Posters, Thu, p.m., FC Turner R. Mars Odyssey, Mon, a.m., Salon B Walker R. J. * Lunar Basalts, Mon, a.m., Salon A Turner R. Mars Odyssey Posters, Tue, p.m., FC Walker R. J. Chicxulub Posters, Tue, p.m., FC Turtle E. Mars Geomorphology, Wed, p.m., Salon B Walker R. J. Achondrites, Wed, p.m., Marina Plaza Turtle E. P. Poking Holes, Mon, a.m., Salon C WalkerR. J. Ordinary Chondrites, Thu, p.m., Salon A Turtle E. P. lo and Beyond, Wed, a.m. Salon A WalkerR. M. Presolar Grains, Thu, p.m., Marina Plaza Turtle E. P. * Cold and Windy on Mars, Wed, a.m., Salon B Wallner A. CAis Posters, Thu, p.m., FC Uceda E. R. Print Only: Education Wallner A. Ordinary Chondrites Posters, Thu, p.m., FC Ueda Y. Print Only: Meteorites Walther K. Rocks Made to Order Posters, Tue, p.m. FC Ueda Y. Martian Meteorites Posters, Thu, p.m., FC Wang A. Mars Instruments Posters, Thu, p.m., FC Ueda Y. Asteroids and Comets Posters, Thu, p.m., FC Wang A. Astrobiology Posters, Thu, p.m., FC Uesugi K. The Wrath of Khandrules, Mon, a.m., Marina Plaza Wang A* Future Mars and Asteroid Missions, Fri, a.m., Salon C UiC. Mars Impacts Posters, Thu, p.m., FC Wang H. Martian Meteorites Posters, Thu, p.m., FC Ulmer M.P. Mars Instruments Posters, Thu, p.m., FC WangR. Martian Meteorites Posters, Thu, p.m., FC Ulyanov A. A. CAis Posters, Thu, p.m., FC Wanke H. Mars Odyssey, Mon, a.m., Salon B Unger z. Education and Public Outreach Posters, Thu, p.m., FC Wanke H. Mars Odyssey, Mon, a.m., Salon B Urquhart M. L. Education and Public Outreach Posters, Thu, p.m., FC WardS. N. Poking Holes, Mon, a.m., Salon C Urrutia-Fucugauchi J* Chicxulub Scientifc Drilling, Mon, p.m., Salon C Ward W.R. Print Only: Origins U shilcubo T. Print Only: Asteroidal and Cometary Dust Waren J. Space Weather, Mon, p.m. Salon A Ushikubo T. CAis Posters, Thu, p.m., FC Warren J. L. IDPs: Comets and Asteroids, Wed, p.m., Salon A Ushikubo T. CAis, Fri, a.m., Marina Plaza WarrenP. H* Lunar Science, Tue, p.m. Salon A Ustinova G. K. Print Only: Moon Washington P. A. Print Only: Mars Utley J.A. Print Only: Mars Washington P. A. Mars Wet and Wild, Thu, a.m., Salon B Vaisnys A. Mars Missions Posters, Thu, p.m., FC Washington P. A. Mars Geomorphology Posters, Thu, p.m. FC Valderrama P. Education and Public Outreach Posters, Thu, p.m., FC Wasserburg G. J. Moon and Mercury Posters, Tue, p.m., FC ValiH. Astrobiology: New Detectives, Fri, a.m., Salon A W asserburg G. J. Origins of Planetary Systems, Thu, a.m., Salon C Valter A. A. Print Only: Meteorites Wasserburg G. J. Evolution of the Early Earth, Thu, p.m., Salon C Valter A. A. Print Only: Impacts Wasson J. T. The Wrath of Khandrules, Mon, a.m., Marina Plaza Val'tts I. E. Print Only: Origins Wasson J. T* The Wrath of Khandrules, Moo, a.m., Marina Plaza Van Cleve J. Lunar Remote Sensing Posters, Thu, p.m., FC WassonJ. T. Achondrites, Wed, p.m., Marina Plaza Van Cleve J. Missions and Instruments Posters, Thu, p.m., FC Watson E. B. Evolution of the Early Earth, Thu, p.m., Salon C van Gasselt S. Future Mars and Asteroid Missions, Fri, a.m., Salon C Watson H. C.* Evolution of the Early Earth, Thu, p.m., Salon C van Niekerk D. Meteoritic Potpourri Posters, Tue, p.m., FC Watson H. C. Terrestrial Planets Posters, Thu, p.m., FC van Niekerk D. Martian Meteorites Posters, Thu, p.m., FC Watson J. S. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Vaniman D. T. Moon and Mercury Posters, Tue, p.m., FC WattK. Education and Public Outreach Posters, Thu, p.m. FC Vaniman D. T. Missions and Instruments Posters, Thu, p.m., FC WattS. Education and Public Outreach Posters, Thu, p.m., FC VanVegbten T. W. Digging Deeper Posters, Tue, p.m. FC Walters T. R. Moon and Mercury Posters, Tue, p.m., FC Varela M. E. Achondrites, Wed, p.m., Marina Plaza Watters T. R. Asteroids and Comets Posters, Thu, p.m., FC VarelaM. E. Basaltic Achondrites, Thu, a.m., Marina Plaza Watters T. R. Mars Geology, Fri, a.m., Salon B Varga T. EIPO Demonstrations, Sun, p.m., LPI Watts D. R. Print Only: Data Distribution Vargbese P. L. Outer Body Experiences Posters, Tue, p.m. FC WebbV.E* Mars Wet and Wild, Thu, a.m., Salon B Varley L. R* The Wrath of Khandrules, Mon, a.m. Marina Plaza Weber I* Ordinary Chondrites, Thu, p.m. Salon A Vasavada A. R. Recent Water on Mars, Thu, p.m. Salon B Weidenschilling S. J.* Origins of Planetary Systems, Thu, a.m., Salon C Veeder G. J. Outer Body Experiences Posters, Tue, p.m. FC Weidinger T. E/PODemonstrations, Sun, p.m., LPI Veeder G. J. lo and Beyond, Wed, a.m., Salon A Weidinger T. Education and Public Outreach Posters, Thu, p.m., FC VelbelM. A. Carbonaceous Chondrites Posters, Tue, p.m. FC Weisberg M. K. The Wrath ofKhandrules, Mon, a.m., Marina Plaza Velikodsky Yu.l. Print Only: Data Distribution Weisberg M. K. * Carbonaceous Chondrites, Tue, a.m., Marina Plaza Venance K. E. Ordinary Chondrites Posters, Thu, p.m., FC Weisberg M. K. Chondrules Posters, Tue, p.m. FC Venturini K. E. Print Only: Mars WeisbergM. K. Achondrites, Wed, p.m., Marina Plaza

34th LPSC Program Index- 173 Weiss-Malik M. Mars Odyssey Posters, Tue, p.m., FC Wittmann A. Poking Holes, Mon, a.m., Salon C Weissman P.R. Asteroids and Comets, Wed, a.m., Salon C Wittmann A. Chicxulub Scientifc Drilling, Mon. p.m., Salon C Weissman P. R. * Asteroids and Comets, Wed, a.m., Salon C Wittmann A. Chicxulub Posters, Tue, p.m., FC Weitz C. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Wlotzka F. Space Weather, Mon, p.m., Salon A Weitz C. M. Mars Surface Posters, Tue, p.m., FC Wolf G. Ordinary Chondrites, Thu, p.m., Salon A Welch S. A. Moon and Mercury Posters, Tue, p.m., FC Wolf S. F. Carbonaceous Chondrites, Tue, a.m., Marina Plaza WellerL. Lunar Remote Sensing Posters, Thu, p.m., FC WolfU. Moon and Mercury Posters, Tue, p.m., FC Weller L.A. Lunar Remote Sensing Posters, Thu, p.m., FC WolffM.J. Mars Odyssey, Mon, a.m., Salon B Wellnitz D. D. Asteroids and Comets, Wed, a.m., Salon C WoodlandS. J. Meteoritic Potpourri Posters, Tue, p.m., FC Welten K. C.* Ordinary Chondrites, Thu, p.m., Salon A Wright A. J. Astrobiology Posters, Thu, p.m., FC WeltenK. C. Ordinary Chondrites Posters, Thu, p.m., FC Wright!. P. Print Only: Meteorites Wentworth S. J. Print Only: Astrobiology Wright I. P. Print Only: Mars Wentworth S. J. Space Weather, Mon, p.m., Salon A Wright I. P. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Wentworth S. J. Moon and Mercury Posters, Tue, p.m., FC Wright I. P. Ordinary Chondrites, Thu, p.m., Salon A Wentworth S. J. Martian Meteorites Posters, Thu, p.m., FC Wright I. P. Martian Meteorites Posters, Thu, p.m., FC Wentworth S. J. Astrobiology: New Detectives, Fri, a.m., Salon A Wright S. P.* Mars Surface Composition, Tue, a.m., Salon B Wentworth S. J. Mars Geology, Fri, a.m., Salon B Wrobel K. E. Poking Holes Posters, Tue, p.m., FC Werner S. C. * Mars Geomorphology, Wed, p.m., Salon B WuL. Astrobiology: New Detectives, Fri. a.m., Salon A Werner S. C.* Future Mars and Asteroid Missions, Fri, a.m., Salon C Wurz P. Missions and Instruments, Thu, a.m., Salon A Wessels B. W. Mars Instruments Posters, Thu, p.m., FC WyattM.B. Mars Surface Composition, Tue, a.m., Salon B Wessels R. Cold and Windy on Mars, Wed, a.m., Salon B WyattM. B. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Westall F. Astrobiology: New Detectives, Fri, a.m., Salon A WyattM. B. Mars Odyssey Posters, Tue, p.m., FC Westphal A. J. * IDPs: Comets and Asteroids, Wed, p.m., Salon A Wyrick D. Y. Print Only: Mars Westphal A. J. Interplanetary Dust Posters, Thu, p.m., FC Wyrick D. Y. Mars Tectonics/Geophysics Posters, Tue, p.m., FC WeylandM. Astrobiology: New Detectives, Fri, a.m., Salon A XieX. Terrestrial Planets Posters, Thu, p.m., FC Whelley P. L. Mars Aeolian Processes Posters, Thu, p.m., FC XieZ. Print Only: Meteorites Whitby J. A* Missions and Instruments, Thu, a.m., Salon A XieZ. Ordinary Chondrites, Thu, p.m., Salon A White B. R. Cold and Windy on Mars, Wed, a.m., Salon B XieZ. Ordinary Chondrites Posters, Thu, p.m., FC WhiteJ. Asteroids and Comets, Wed, a.m., Salon C Xiong Y.-L. Print Only: Meteorites Whittet D. C. B. Lunar Science, Tue, p.m., Salon A Yada T. Print Only: Asteroidal and Cometary Dust Wieczorek M. A.* Lunar Science, Tue, p.m., Salon A Yakovlev O. I. Print Only: Moon Wieland F. Poking Holes Posters, Tue, p.m., FC Yakovlev O. I. Space Weather, Mon, p.m., Salon A WielerR. Print Only: Meteorites Y akshinskiy B. V. Print Only: Moon WielerR. Meteoritic Potpourri Posters, Tue, p.m., FC Yamaguchi A* Basaltic Achondrites, Thu, a.m., Marina Plaza WielerR. Evolution of the Early Earth, Thu, p.m., Salon C Yamaguchi A. Achondrites Posters, Thu, p.m., FC WielerR. Terrestrial Planets Posters, Thu, p.m., FC Yamamoto K. Carbonaceous Chondrites, Tue, a.m, Marina Plaza WielerR. Ordinary Chondrites Posters, Thu, p.m., FC Yamamoto S* Digging Deeper, Tue, a.m., Salon C Wiens R. C. Print Only: Mars Yamamoto S. Digging Deeper Posters, Tue, p.m., FC Wiens R. C. Mars Odyssey Posters, Tue, p.m., FC Yamanaka C. Moon and Mercury Posters, Tue, p.m., FC WiensR. C. Missions and Instruments, Thu, a.m., Salon A Yamashita N. Lunar Remote Sensing Posters, Thu, p.m., FC Wiens R. C. Mars Instruments Posters, Thu, p.m., FC Yamazaki A. Mars Missions Posters, Thu, p.m., FC WiensR. C. Mars Missions Posters, Thu, p.m., FC Yanai K. Achondrites Posters, Thu, p.m., FC Wiens R. C. Future Mars and Asteroid Missions, Fri, a.m., Salon C Yang J.* Achondrites, Wed, p.m., Marina Plaza WiesliR. A. Moon and Mercury Posters, Tue, p.m., FC Yano H. Missions and Instruments Posters, Thu, p.m., FC WiesmannH. Martian Meteorites, Wed, a.m., Marina Plaza Yen A. Future Mars and Asteroid Missions, Fri, a.m., Salon C WiesmannH. Achondrites, Wed, p.m., Marina Plaza Yen A. S. Mars Instruments Posters, Thu, p. m, FC WiesmannH. Basaltic Achondrites, Thu, a.m., Marina Plaza Yeomans D. K. Print Only: Missions and Instruments WiesmannH. Martian Meteorites Posters, Thu, p.m., FC Yin Q. Evolution of the Early Earth, Thu, p.m., Salon C Wilcox B. B.* Space Weather, Mon, p.m., Salon A Yin Q. Z. Moon and Mercury Posters, Tue, p.m., FC Wilcox B. B. Lunar Remote Sensing Posters, Thu, p.m., FC Yin Q. Z.* Origins of Planetary Systems, Thu, a.m., Salon C Wilcox B. B. Mars Instruments Posters, Thu, p.m., FC Yingst R. A. Mars Missions Posters, Thu, p.m., FC WilfJ. Maps 'n Bits Posters, Tue, p.m., FC Yokohata T. Mars Bipolar Syndrome Posters, Thu, p.m., FC Wilkins A. D. Print Only: Astrobiology Yokota Y. Lunar Remote Sensing Posters, Tho, p.m., FC Wilkins A. D. Astrobiology Posters, Thu, p.m., FC Yoon J. Education and Public Outreach Posters, Thu, p.m., FC Williams B. G. Asteroids and Comets, Wed, a.m., Salon C Yoshida T* Presolar Grains, Thu, p.m., Marina Plaza Williams D. A.* Io and Beyond, Wed, a.m., Salon A Yoshikawa I. Mars Missions Posters, Thu, p.m., FC Williams J. G. Lunar Geophysics Posters, Thu, p.m., FC Young E. D.* Nucleosynthesis, Mon, p.m., Marina Plaza Williams K. Missions and Instruments Posters, Thu, p.m., FC Young E. D. CA!s, Fri, a.m., Marina Plaza Williams K. K. Print Only: Mars Yu C. H. Future Mars and Asteroid Missions, Fri, a.m., Salon C Williams K. K. Mars Aeolian Processes Posters, Thu, p.m., FC Yung K. L. Future Mars and Asteroid Missions, Fri, a.m., Salon C WilliamsM. Mars Instruments Posters, Thu, p.m., FC YurimotoH.* The Wrath of Khandrules, Mon. a.m., Marina Plaza Williams R. M. E. Water on Mars Posters, Thu, p.m., FC Yurimoto H. Carbonaceous Chondrites Posters, Tue, p.m., FC Williams S. H. EIPO Demonstrations, Sun, p.m., LPI YurimotoH. CAis Posters, Thu, p.m., FC Williams S. H. Cold and Windy on Mars, Wed, a.m., Salon B Yurimoto H. CA!s, Fri, a.m., Marina Plaza Wilson L. Mars Volcanism, Mon, p.m., Salon B Zabalueva E. V. Mars Geomorphology Posters, Thu, p.m., FC Wilson L. Moon and Mercury Posters, Tue, p.m., FC Zahnle K.* Moving and Grooving Ice, Tue, a.m., Salon A WilsonL. Red Hot Lava Posters, Tue, p.m., FC Zanda B. The Wrath of Khandrules, Mon, a.m., Marina Plaza WilsonL. Mars Alteration Posters, Tue, p.m., FC ZanolinM. Moving and Grooving Ice, Tue, a.m., Salon A Wilson L. Outer Body Experiences Posters, Tue, p.m., FC Zega T. J. Carbonaceous Chondrites Posters, Tue, p.m., FC WilsonL.* Mars Wet and Wild, Thu, a.m., Salon B Zeigler R. A. Lunar Science, Tue, p.m., Salon A WilsonL. Basaltic Achondrites, Thu, a.m., Marina Plaza Zeigler R. A.* Lunar Science, Tue, p.m., Salon A WilsonL. Ordinary Chondrites, Thu, p.m., Salon A Zeigler R. A. Moon and Mercury Posters, Tue, p.m., FC WilsonR.R. Outer Body Experiences Posters, Tue, p.m., FC Zeitlin C. Print Only: Mars Odyssey Wilson s. A.* Cold and Windy on Mars, Wed, a.m., Salon B Zeitlin C.* Mars Odyssey, Mon. a.m., Salon B Wilson S. A. Mars Aeolian Processes Posters, Thu, p.m., FC Zeitlin C. Mars Odyssey Posters, Tue, p.m., FC WilsonT. L. Print Only: Moon Zeitlin C. J. Mars Odyssey, Mon, a.m., Salon B Wing B. A. Astrobiology Posters, Thu, p.m., FC Zellner N. E. B.* Lunar Science, Tue, p.m., Salon A Wirick S. IDPs: Comets and Asteroids, Wed, p.m., Salon A ZentA. Mars Instruments Posters, Thu, p.m., FC Wirick S. Interplanetary Dust Posters. Thu, p.m., FC ZentA. P. Red Hot Lava Posters, Tue, p.m., FC WiseJ. Asteroids and Comets, Wed, a.m., Salon C Zeni A. P. Mars Geology, Fri, a.m., Salon B

174 34th LPSC Program Index Zhang F. Martian Meteorites Posters, Tim, p.m., FC Zolensky M. E. Carbonaceous Chondrites, Tue, a.m., Marina Plaza Zhang J. Outer Body Experiences Posters, Tue, p.m., FC Zolensky M. E* Carbonaceous Chondrites, Tue, p.m., Marina Plaza ZhangW. Martian Meteorites Posters, Thu, p.m., FC Zolensky M. E. Carbonaceous Chondrites Posters, Tue, p.m., FC Zhang Y. Meteoritic Potpourri Posters, Tue, p.m., FC Zolensky M. E. IDPs: Cornets and Asteroids, Wed, p.m., Salon A ZhangY* Evolution of the Martian Interior, Wed, p.m., Salon C Zolensky M. E. Basaltic Achondrites, Thu, a.m., Marina Plaza ZhongS. Mars Geophysics and Tectonics, Tue, p.m., Salon C Zolensky M. E. Interplanetary Dust Posters, Thu, p.m., FC ZiegM. J. Chondrules Posters, Tue, p.m., FC Zolensky M. E. Astrobiology: New Detectives, Fri, a.m., Salon A Zimbelman J. R. EIPO Demonstrations, Sun, p.m., LPl Zolotov M. Yu. * Carbonaceous Chondrites, Tue, p.m., Marina Plaza Zimbelman J. R* Mars Volcanism, Mon, p.m., Salon B Zolotov M. Yu. Red Hot Lava Posters, Tue, p.m., FC Zimbelman J. R. Mars Odyssey Posters, Tue, p.m., FC ZuberM. T. Mars Geophysics and Tectonics, Tue, p.m., Salon C Zimbelman J_ R. Red Hot Lava Posters, Tue, p.m., FC ZuberM. T. Mars Odyssey Posters, Tue, p.m., FC Zimbelman J. R. Cold and Windy on Mars, Wed, a.m., Salon B ZuberM. T. Maps 'n Bits Posters, Tue, p.m., FC Zimbelman J. R. Mars Aeolian Processes Posters, Thu, p.m., FC ZuberM. T. Cold and Windy on Mars, Wed, a.m., Salon B Zimbelman J. R. Mars Bipolar Syndrome Posters, Thu, p.m., FC ZuberM. T. Asteroids and Comets, Wed, a.m., Salon C Zimmermann C. Nucleosynthesis, Mon, p.m., Marina Plaza Zucconi J.-M. IDPs: Comets and Asteroids, Wed, p.m., Salon A Zimmermann L. Rocks Made to Order Posters, Tue, p.m., FC Zurcher L. Chicxulub Scientifc Drilling, Mon, p.m., Salon C Zimmermann L. IDPs: Comets and Asteroids, Wed, p.m., Salon A Zurcher L.* Chicxulub Scientifc Drilling, Mon, p.m., Salon C Zinner E. Achondrites, Wed, p.m., Marina Plaza Zurcher L. Chicxulub Posters, Tue, p.m., FC Zinner E. Basaltic Achondrites, Thu, a.m., Marina Plaza ZurekR. Mars 2003 Rover/Spectral Studies, Tue, p.m., Salon B Zinner E. Presolar Grains, Thu, p.m., Marina Plaza Zuromski K. K. Mars Geomorphology Posters, Thu, p.m., FC Zinovieva N. G. Print Only: Meteorites Zuschneid W. Print Only: Mars Zipfel J. Ordinary Chondrites Posters, Thu, p.m., FC ZolenskyM. Future Mars and Asteroid Missions, Fri, a.m., Salon C

34th LPSC Program Index------175