SPONSORED BY NATIONAL AERONAUTICS AND SPACE ADMINISTRATION LUNAR AND PLANETARY INS11TUTE NASA JOHNSON SPACE CENTER

LPI Program to Technical Sessions

THIRTY-SECOND LUNAR AND CONFERENCE

March 12-16, 2001

Houston, Texas

Sponsored by

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

Program Committee

Carl Agee, Co-Chair, NASA Johnson Space Center David , Co-Chair, Lunar and Planetary Institute Donald Brownlee, University of Washington Nadine Barlow, University of Central Florida Mark Cintala, NASA Johnson Space Center Christine Floss, Washington University Lisa Gaddis, U.S. Jeffrey Gillis, Washington University Eric Grosfils, Pomona College Joseph , Lunar and Planetary Institution Robert Herrick, Lunar and Planetary Institution Gary Huss, Arizona State University Noam Izenberg, Johns Hopkins University Michael Kelley, NASA Johnson Space Center David Kring, University ofArizona Lauretta, Arizona State University Patrick McGovern, Lunar and Planetary Institute Robert Nichols, Washington University John Rummel, NASA Headquarters Susan Sakimoto, NASA Space Flight Center Allan Treiman, Lunar and Planetary Institute Richard , University of Maryland Frances Westall, Lunar and Planetary Institute ROOM C

FIRST FLOOR Robert R. Gilruth Recreation Facility Building 207

ROOM B 104 ,..

SECOND FLOOR Robert R. Gilruth Recreation Facility Building 207 ERRATA Thirty-Second Lunar and Planetary Science Conference 12-16, 2001

Tuesday, March 13, 2001 Canceled Poster Outer Body Expierences Brooks S.M. Esposito L. W. Throop H. B. Showalter M. R. Photometric Analysis ofJupiter's Main Ring with Galileo SSI and NIMS Imaging [#2146] We present the findings of our photometric analysis of both Galileo SSI and NIMS data of the Jovian main ring. Our results are discussed in the context of previous work. In particular, we reconcile the seemingly disparate results from earlier research.

Thursday, March 16, 2000 Canceled Poster Fire & McEwen A. P. Milazzo M. Turtle E. Keszthelyi L. Porco C. Simonelli D. Belton M. Galileo SSI Team and Galileo Imaging Observations ofIo [#1824] Galileo completed its 29th periapsis of on 12-29- 2000, and the closest approach to Jupiter by Cassini occurred the next day. Both spacecraft cameras imaged Io, especially during to observe high-temperature hot spots and visible aurora

CONFERENCE INFORMATION

Registration - LPI Open House

A combination Registration/Open House will be held Sunday, March 11, 2001, from 5:00 p.m. until 8:00 p.m. at the Lunar and Planetary Institute. Registration will continue in the Gilruth 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 8:30p.m.

Message Center

A message center will be established in the registration area in the Gilruth Center during the oral sessions. People who need to contact attendees during the conference may call281-483-0321. The message center will be open Monday through Thursday from 8:00 a.m. to 5:00 p.m. and Friday from 8:00 a.m. until noon. A fax machine will be located at the staff desk for incoming messages only. Faxes should be sent to 281-483-8722. Telephone messages and faxes will be posted on a bulletin board near the registration desk.

Shuttle Bus Service

A shuttle bus service between JSC, LPI, University of Houston-Clear , 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.

Badges

During the of the conference, your conference badge will allow access to JSC at all gates, the Gilruth Center, and the JSC cafeterias in Buildings 3 and 11. Please be aware that this badge does not allow access to those areas or buildings not open to the general public except those specifically outlined above.

Space Center Houston

Space Center Houston is open from 10:00 a.m. until 5:00 p.m. weekdays and from 10:00 a.m. until 7:00 p.m. on weekends. Major attractions are the Mission Status Center, Starship Gallery, tour of JSC, Space Shuttle Mock-Up, Space Center Theater, Manned Maneuvering Unit, and Space Center Plaza. Restaurants and gift shops are available. Ticket prices are $14.95 for adults, $13.95 for seniors (65 and older), and $10.95 for children ages 4-11 (children 3 and under are free). For further information, call281-244-2105.

GUIDE TO TECHNICAL SESSIONS AND ACTIVITIES

Monday Morning, 8:30 a.m. Room A The Carbonaceous Room B : New Views of Lunar Internal Processes and Evolution Session dedicated to the memory of John A. 0 'Keefe Room C : Kablooie, Rumble, and Whoosh Room D Origins of Planetary Systems

Monday Afternoon, 1:30 p.m. Room C PLENARY SESSION Presentations to the 2000 GSA Stephen E. Dwomik followed by Harold Masursky Lecture by Sean Solomon

Monday Afternoon, 2:45 p.m. Room A RoomE : Texture, Time, and Roome Frozen Mars: Polar, Glacial, and Cold Things RoomD Outer Body Experiences

Tuesday Morning, 8:30 a.m. Room A : Nebular and Parent-Body Room B Impact Ejecta and More Room C Mars: and Interior Evolution Session dedicated to the memory of William M. Kaula Room D Lunar Impacts: Processes and Effects

Tuesday Afternoon, 1:30 p.m. Room A Refractory Inclusions Room B Mars: Magnets, Faults, and Revealed Impacts Room C A NEAR Eros RoomD Impact Cratering

Tuesday Evening, 7:00-9:30 p.m. UHCL Poster Session I Mars: Wrinkled and Ridged Origins of Planetary Systems Mars Channels, , and Oceans Modeling Processes Mars: Small-Scale Surface Features Environmental Effects of Impact Cratering Mars Polar Impact Cratering on Mars Mars Volcanism Martian Mars Data Calibration and Archiving Chondrules Mars Mapping The Tagish Lake Outer Body Experiences Refractory Inclusions Venus and Geophysics , , and Other : Observations - Connections and Analyses A Year NEAR Eros Lunar Surface Processes: Implants, - Micro Session Facelifts, and Extractions Space Science Education Lunar Jambalaya: Petrology, , and Geophysics

Wednesday Morning, 8:30 a.m. Room A Carbonaceous Chondrites Room B Io: Inside and Out Roome Mars Surface Drainage: Oceans, Networks, and Gullies RoomD Planetary Formation and Early Evolution I Wednesday Afternoon, 1:30 p.m. Room A Session dedicated to the memory ofJohn H. Reynolds RoomE Small Bodies: Shake, Bake, Microwave, Let Stand Roome Deposition and in Martian Canyons, Channels, and Other Terrains RoomD Angrites, Eucrites, and Other Achondrites Session dedicated to the memory ofMartin

Wednesday Afternoon, 5:00p.m. Roome NASA Program Managers' Briefing

Wednesday Evening, 6:00-9:30 p.m. Conference Social Event, Hall, Pasadena Fairgrounds

Thursday Morning, 8:30 a.m. Room A Astrobiology I: Thinking Big to the Nitty Gritty Room B Moon: New Views of Composition and Maturity Room C Mars: Subsurface Ice to Surface History Room D Planetary Formation and Early Evolution II

Thursday Afternoon, 1:30 p.m. Room A SPECIAL SESSION: Europa Surface-Subsurface Material Interchange, Burial, and Resurfacing Processes Room B Moon: Remote Sensing Perspectives Room C Martian Soil Chemistry and Mineralogy Room D Cosmic Dust

Thursday Afternoon, 5:15p.m. Room A PANEL DISCUSSION: Societal Connections of Planetary Exploration and the Search for Life Elsewhere

Thursday Evening, 7:00-9:30 p.m. UHCL Poster Session II Mars Surface Properties I Impact Crater Geology Mars Surface Properties II Mars and Dust Impact Crater Geophysics Mars Missions Carbonaceous Chondrites Missions, Instrumentation, and Meteorites: Isotopic and Elemental Variations and Sample Collection!Curation New Analytic Techniques Fire and ICE (Io, Callisto, Europa) New Meteorites Europa Surface-Subsurface Material Ordinary and Enstatite Chondrites Interchange, Burial, and Shock Processes in Meteorites Resurfacing Processes Meteorites Remote Views of the Moon: Past, Planetary Formation and Early Evolution Present, and Future Astrobiology II: Melting Pot Cosmic Dust Small-Body Goulash

Friday Morning, 8:30 a.m. Room A Astrobiology III: Feet on the Ground Room B Meteorites: Composition, Chronology, and Cosmogenic Nuclides Room C Martian Meteorites Room D Mars: Looking Down, Blown Around, and on the Ground * Designates Speaker Room A - Gilruth Room 104 Room B-Gilruth Old Gym Room C- Gilruth New Gym Room D- Gilruth Room 206 UHCL- University of Houston-Clear Lake, Bayou Building

Monday, March 12, 2001 THE TAGISH LAKE CARBONACEOUS CHONDRITE 8:30 a.m. Room A

Chairs: M. M. Grady L.A.Leshin

Gounelle M. Zolensky M. E.* Tonui E. Mikouchi T. Mineralogy ofTagish Lake, a Unique Type 2 Carbonaceous Chondrite [#1616] We have identified in Tagish Lake an abondant carbonate-poor lithology and a less common carbonate-rich lithology. Tagish Lake shows similarities and differences with CMs and Clls. It is a unique carbonaceous chondrite recording specific aqueous alteration conditions.

Keller L. P. * Flynn G. J. Matrix Mineralogy of the Tagish Lake Carbonaceous Chondrite: TEM and FTIR Studies [#1639] TEM and FTIR studies ofTagish Lake matrix show that it is similar to CI chondrites, but dissimilar to CM.

SimonS. B. * Grossman L. Petrography and Chemistry of the , Inclusion and Populations in the Tagish Lake Carbonaceous Chondrite [#1240] We subjected a small amount ofTagish Lake to freeze-thaw disaggregation to isolate the dense, high-temperature, fraction. Study of this population of objects is an important step in the comparison of Tagish Lake with other carbonaceous chondrites.

Nakamura T. * Noguchi T. Zolensky M. E. Takaoka N. Noble Gas Isotopic Signatures and X-Ray and Electron Diffraction Characteristics ofTagish Lake Carbonaceous Chondrite [#1621] Noble gas isotopic signatures and X-ray and electron diffraction characteristics of Tagish Lake indicate that it is a unique carbonaceous chondrite rich in saponite, Fe-Mg-Ca carbonate, primordial noble gases, and presolar grains.

Messenger S. * Isotopic Measurements of the Tagish Lake Meteorite [#1916] In an ion microprobe study of Tagish Lake matrix material we find commonly elevated DIH ratios, reaching 700%o above SMOW. These values are higher than typical CI and CM chondrites, but lower than CR and LL3 chondrites and IDPs.

Grady M. M. * Franchi I. A. Verchovsky A. B. I. P. Fillinger C. T. Continued Investigation of the Light Element Geochemistry ofTagish Lake [#1733] We have determined the abundance and isotopic composition oftwo separate carbonate generations within Tagish Lake. analysis of the chondrite shows it to be organic-rich, with 8 15N values higher than in CI and CM chondrites.

Pizzarello S. * Soluble Organics in the Tagish Lake Meteorite: A Preliminary Assessment [#1886] A preliminary study of the soluble organics present in the Tagish Lake meteorite has been conducted. and solvent soluble compounds were identified.

32nd LPSC Program------1 Gilmour I. Pearson V. K. * Sephton M.A. Analysis ofTagish Lake Macromolecular Organic Material [#1993] Macromolecular material is, by far, the major organic component of meteorites. Flash pyrolysis GCMS has been used to investigate this organic component in Tagish Lake. It is more condensed, less susbtituted than Murchson.

Baker L. * Franchi I. A. Bland P. A. Wright I. P. Pillinger C. T. Insight into the Evolution of the Tagish Lake Carbonaceous Chondrite by Analysis of the Isotopic Composition of Extracted Water and Moss bauer Spectroscopy [#1703] Analysis of oxygen in water from Tagish Lake together with Mossbauer spectroscopy suggest some similarities to the CI group of meteorites but also suggest differences in the extent of hydrothermal alteration.

Clayton R.N. * Mayeda T. K. Oxygen Isotopic Composition of the Tagish Lake Carbonaceous Chondrite [#1885] We use oxygen isotopes to show the relationship of the Tagish Lake chondrite to the CM2 and Cll groups. Tagish Lake underwent hydration at low temperature in a water-rich environment.

Engrand C.* Gounelle M. Duprat J. Zolensky M. E. In-Situ Oxygen Isotopic Composition of Individual in Tagish Lake, a Unique Type 2 Carbonaceous Meteorite [#1568] We measured the oxygen isotopic composition of individual minerals in Tagish Lake. The relationship with carbonaceous chondrites is confirmed. We found very 160 enriched . The carbonates will require a dedicated study of their C and 0 isotopes.

Leshin L. A* Farquhar J. Guan Y. Pizzarello S. Jackson T. L. Thiemens M. H. Oxygen Isotopic Anatomy ofTagish Lake: Relationship to Primary and Secondary Minerals in CI and CM Chondrites [#1843] Ion probe analyses of olivine from Tagish Lake are similar to other C chondrites, but slightly more 160 rich. Stepped extraction of carbonate shows ~ 17 0 values higher than CI or CM chondrites. Tagish Lake may be a new, unique C2 chondrite.

Lindstrom D. J. * Calibration of Cosmic Ray-produced Nuclides in Meteorites by Normalization to 40K -Application to the Tagish Lake Meteorite [#2073] Preliminary results for cosmic ray-induced nuclides in the Tagish Lake meteorite are obtained by estimating detection efficiency from 40K count rates and using published K content.

2 ______32ndLPSCProgram Monday, March 12, 2001 MOON: NEW VIEWS OF LUNAR INTERNAL PROCESSES AND EVOLUTION 8:30 a.m. Room B

On September 8, 2000, John A. O'Keefe died of liver cancer. John was long known as a vociferous advocate of the lunar origin of , those small, glassy objects found in strewn fields in certain regions of the , but he made many contributions to different fields of the space sciences, especially . Few oftoday's lunar students are aware of the very special role played by John O'Keefe in the incorporation of geology into America's race to the Moon in the 1960s. As memorably recounted by Don Wilhelms in his book To A Rocky Moon, O'Keefe attended a lecture in early 1960 by one Gene at the Cosmos Club, a cornerstone of intellectual life in Washington, DC (G. K. , among other luminaries, belonged to it). O'Keefe was fascinated by Gene's description of impact mechanics at Meteor Crater and its applications to the impact origin of . At the time, John believed deeply in the lunar impact origin of tektites and was impressed by both Gene's geological acumen and enthusiasm. At NASA Headquarters, John strongly promoted the Shoemaker proposal to allow the U.S. Geological Survey to map the Moon geologically and train the astronauts who would fly . John's critical support of the Survey proposal, at a time when geology was considered an inferior science (by Harold among others), was instrumental in obtaining NASA's ultimate approval of Gene's proposal and hence the incorporation of geoscience into America's race to the Moon. Ironically, such incorporation led to the discrediting ofthe lunar origin oftektites, an idea John did not let go of easily. But without his timely intervention, we might well have developed a space science program more similar to that of the Soviets- heavy on physically based "sky science," ignoring the predominantly geological character of the Moon. John was a true gentleman and scholar, widely read in many different scientific disciplines. We respectfully dedicate this session to the memory of a pioneer of lunar science, John A. O'Keefe. -Paul D. Spudis

Chairs: C. R. Neal H. Hiesinger

Lawson S. L. * Feldman W. C. Moore K. R. Lawrence D. J. Maurice S. Belian R. D. Binder A. B. Preliminary Results from the Lunar Alpha Particle Spectrometer [#2160] Data measured using the Alpha Particle Spectrometer were surveyed to search for surface deposits ofpolonium-210. Preliminary results show that a marginal, yet statistically-significant _signal was indeed detected on the lunar front side.

Neal C. R. * Ely J. C. Jain J. C. The Siderophile Element Budget of the Moon: A Reevaluation, Part 1 [#1658] New PGE data demonstrate that the Moon is not as depleted in these elements as once thought.

Peterson C. A. * Hawke B. R. Lucey P. G. Taylor G. J. Blewett D. T. Spudis P. D. Lunar : A Global Layer [#1592] Lunar anorthosite has been identified from ground-based near infrared reflection spectroscopy and spacecraft multispectral imagery. A global layer of anorthosite remains largely intact but mostly buried. Pole- basin ejecta covers much of it.

Longhi J. * and the : New Calculations and Constraints [#2151] New calculations show that a magma ocean similar to the Earth's upper (PUM) produces sufficient differentiated liquids that are suitable potential parents of LFA when initial bottom pressures are in the range of 30 to 40 kb.

Korotev R. L. * Jolliff B. L. The Curious Case of the Lunar Magnesian Granulitic [#1455] Magnesian granulitic breccias have high Th/Sm ratios, they are not related to Mg-suite plutonic rocks in any straightforward manner, and they may have an igneous precursor that is not yet recognized among our samples of the Moon.

32nd LPSC Program------3 Fincke E. M. * Ryder G. Chemical Variation of Mineral Phases in Lunar Feldspathic Granulitic : Implications for Thermal Histories and Provenances [#1227] We report on the internal variation and abundances of minor elements of silicate phases in lunar granulitic impactites to assess their thermal histories and the pre-metamorphic provenances of the minerals and the process that assembled the rocks.

Shearer C. K. * Papike J. J. Hagerty J. Chemical Dichotomy of the Mg-Suite. Insights from a Comparison of Trace Elements in from a Variety of Lunar Basalts [#1643] Trace element analyses of silicates in the Mg-suite and other lunar igneous rocks are used to evaluate models for the origin of the Mg-suite.

Elkins Tanton L. T. * Grove T. L. Lunar Mantle Composition and Thermal History: Constraints from Phase Equilibrium Studies [#1791] Results of experimental phase equilibrium and compositional modeling studies are presented for the glasses. When combined with other phase equilibrium results, they help constrain lunar mantle composition and temperature between 3.3 and 3.5 Ga.

Shih C.-Y. * Nyquist L. E. Reese Y. Wiesmann H. Schwandt C. Rb-Sr and Sm-Nd Isotopic Constraints on the Genesis of Lunar Green and Orange Glasses [#1401] Rb-Sr and Sm-Nd isotopic compositions of lunar green and orange glasses suggest that orange glass and high-Ti mare basalts can be produced by partial melting of hybrid sources composed of early LMO cumulate mixing with late-stage LMO Ti-rich cumulates.

Dikov Yu. P. Yakovlev O. I. Gerasimov M. V. * Wlotzka F. Huth J. "Pristine" Lunar Glasses: Why Not of Impact Origin? [#1559] Experimental simulation of an impact of chondri tic projectile into lunar mare resulted in the production of glass spherules compositionally resembling "pristine" lunar glasses.

Hiesinger H.* Head J. W. III U. Neukum G. Lunar Mare Basalts: Mineralogical Variations with Time [#1826] We performed crater counts for -220 basalt units exposed in the mare region of the lunar nearside. Combined with new mineralogical data, these data allow a detailed investigation of the relationship between mineralogy and age of a basalt.

Yingst R. A.* Theno T. W. Characteristics of Ponds on the Moon's North Rim as Indicators of Magma Transport Mechanisms [#1350] Analysis of morphological, compositional and volumetric characteristics of individual eruptive phases on the Moon's north rim provides evidence that places constraints on possible theories of basaltic magma rise through a low-density .

Wilson L. * Head J. W. III Ascent and Eruption of Mare Basalts on the Moon [#1297] Dike propagation mechanics impose severe limitations on the volumes of magma that can be brought to shallow depths on the Moon by buoyancy alone. Large volume eruptions and intrusions require magma reservoirs close to the base of the crust.

4 32ndLPSCProgram Monday, March 12, 2001 MARS VOLCANISM: KABLOOIE, RUMBLE, AND WHOOSH 8:30a.m. Room C

Chairs: L. S. Glaze L. P. Keszthelyi

Glaze L. S. * Baloga S. M. Validity of Convective Plume Rise Models for Volcanic Eruptions on Mars [#1209] We identify conditions required for valid application of convective plume rise models to large-scale volcanic plumes on Mars. Our results suggest that Mars plumes may rise to altitudes substantially less than previously thought.

Mitchell K. L. * Wilson L. Explosive Volcanic Eruptions on Mars: Misconceptions arzd New Insights [#1190] Some misconceptions about the explosivity of martian volcanism are discussed, and new insights from numerical modelling are presented. We demonstrate how volcanic activity on Mars may have been more explosive than previously believed.

Chapman M. G. * Layered Material of Variable on Mars: Possible Late to Early Amazonian Tephra? [#1709] The light, intermediate, and dark layered, massive, and thin (or LMT) mesa unit outcrops in MOC images, at mostly equatorial on Mars, have a range of ages and may be tephra layers formed by -ice interactions.

Gregg T. K. P. * Crown D. A. Sakimoto S. E. H. Evolution and Erosion ofTyrrhena and Hadriaca Pate rae, Mars: New Insights from MOC and MOLA [#1628] Investigation ofHadriaca and Tyrrhena Paterae, Mars, using MOC and MOLA data reveals new information about formation, channel development, and lava flow-field emplacement.

Ruff S. W. * V. E. Mineralogical Anomalies in Mars' Nili Patera Caldera Observed with Thermal Emission Spectrometer Data [#2186] TES has detected thermal infrared spectral anomalies in the floor of Nili Patera caldera indicating different mineralogy than the rest of Syrtis Major.

Sakimoto S. E. H.* Garvin J. B. Bradley B. A. Wong M. Frawley J. J. Small Martian North Polar Volcanoes: Topographic Inplicationsfor Eruptive Styles [#1808] We characterize and model small volcanoes in the martian mid- and near-polar regions. Regional differences and possible latitude-dependent geometry parameters hint that subsurface may be significant for polar eruptions.

Wilson L. * Mouginis-Mark P. J. Estimated Volcanic Eruption Conditions During a Large Flank Eruption on Elysium Mons, Mars, Using Mars Global Surveyor Data [#1259] We use data from MOLA and MOC as input into a numerical model the formation of a channel formation on the flanks of Elysium Mons, Mars. Calculated lava volume is 33-36 cubic km, flow rate 5000 to 15000 m/s, and the eruption lasted 26 to 80 days.

Tanaka K. L. * Evidence for Magmatically Driven Catastrophic Erosion on Mars [#1898] Some large highland plains and many depressions in volcanic areas on Mars may result from catastrophic surface and subsurface erosion induced by shallow intrusions. The crust appears to be readily eroded and may be rich in dioxide.

32nd LPSC Program------5 Ori G. G.* Komatsu G. Ormo J. Marinangeli L. Subsurface Models for the Formation ofMound-like Morphologies on Mars [#1539] Several features on Mars have been interpreted as the product of gas releases from the subsurface. Most described features resemble mud volcanoes. Moreover, subsurface gas releases on the Earth are strictly linked to chemosynthetic biota.

Russell P. S. * Head J. W. III The Elysium!Utopia Flows: Characteristics from and a Model of Emplacement [#1040] A model oflaterally-propagating dikes disrupting a groundwater-confining cryosphere in NW Elysium accounts for the major features and their topographic relationships.

Webb B. * Head J. W. III Kortz B. E. PrattS. Syria Planum, Mars: A Major Volcanic Construct in the Early History ofTharsis [#1145] Syria Planum is a major constructional edifice in excess of2000 km diameter dominated by radial dike emplacement, flow aprons, and proximal small shield development, and represents a distinctive volcanic center of Noachian- age.

Mouginis-MarkP. J. * Martian Volcanoes Seen in Cross-Section in Mars Orbiter Camera Images [#1483] MOC images are used to observe parts of martian volcanoes in cross-section. Several examples of lava flow units and possible ash layers are described.

Keszthelyi L. * McEwen A. S. Terrestrial Analogs for Martian Volcanic Features Seen in MOC Images [#1509] Comparison of MOC images to terrestrial analogs suggests that basaltic dominate the plains of Mars, alkalic lavas cap the shield volcanoes, and reworked pyroclastic materials produce many of the "sedimentary" layered terrains.

6 32nd LPSC Program Monday, March 12, 2001 ORIGINS OF PLANETARY SYSTEMS 8:30 a.m. Room D

Chairs: R. Malhotra A.P.

Cameron A. G. W. * Extinct Radioactivities and the R-Process Jet [#1035] Postulate: All extinct radioactive species in the solar nebula were injected from a core-collapse supernova. I discuss primarily the products expected from an r-process jet in this supernova, and various supporting astrophysical observations.

Vanhala H. A. T. * Injection of Radioactivities into the Forming : High-Resolution Simulations [#1170] High-resolution simulations of the injection of short-lived radioactivities into the forming solar system suggests that the distribution of radionuclides in the early solar system could have been inhomogeneous.

Boss A. P. * Gas Giant Protoplanet Formation: Disk Instability Models with Detailed Thermodynamics and Radiative Transfer [#1193] Disk instability models including radiative transfer in the diffusion approximation and detailed thermodynamics lead to the formation of clumps similar to those in locally isothermal models, supporting the hypothesis of gas giant protoplanet formation by this mechanism.

Kornet K. * Stepinski T. F. Rozyczka M. Diversity of Planetary Systems from Evolution of Solids in Protoplanetary Disks [#1612] We investigate dependence of planetary system size and mass on initial conditions of forming nebula. We find that in most cases either no planetary system or large system forms. Solar system can be obtained from a restricted set of initial conditions.

Marshall J. * Cuzzi J. Electrostatic Enhancement of Coagulation in Protoplanetary Nebulae [#1262] Microgravity experiments suggest that electrostatic forces (overwhelmed by normal Earth ) could greatly enhance cohesive strength of preplanetary aggregates. Cohesive forces may be 103 times larger than those for adhesion.

Leinhardt Z. M. * Richardson D. C. The Effect of the Internal Configuration ofRubble Piles on Collision Outcome [#1400] We present results from numerical simulations of collisions between gravitationally bound aggregates of loose material (rubble piles) in order to investigate the effect of the internal configuration on collision outcome.

Malhotra R. * Allen R. L. Bernstein G. M. The Edge of the Solar System [#1204] Our medium-wide and -deep Kuiper Belt survey, deep enough to detect KBOs of diameter >160 km at a distance of 65 AU, detected 24 objects, none beyond 53 AU. We discuss the implications for the distant planetesimal disk.

Inaba S. * Wetherill G. W. Formation of Jupiter: Core Model with Fragmentation [#1384] We investigate formation of the Jovian core including fragmentation. The mass of the Jovian core becomes large enough to capture a large amount of gas and complete Jupiter in 2 m.y. There is still a problem of an excess of Jupiter cores.

32nd LPSC Program------7 Kortenkamp S. J. Wetherill G. W. * Inaba S. Trilling D. E. Asteroid Fonnation with a Pre-Existing Jupiter [#1796] If Jupiter formed quickly by the disk-instability mechanism, then growth of -size requires: (1) little or no migration of Jupiter before dissipation of the solar nebula, or (2) some asteroid growth prior to Jupiter's formation.

Levison H. F.* Dones L. Canup R. Agnor C. Duncan M. J. The Role of Giant in Terrestrial Fonnation [#1232] We present a progress report of a continuing study of the coupling between outer planetary system architecture and inner planetary system formation.

Weidenschilling S. J. * Davis D. R. Planetary Accretion: The First 5 Million [#1894] A new simulation of accretion yields planet-sized bodies within a few MY inside 2 AU, aided by migration of planetary embryos. Growth is slower at larger distances; runaway does not go to completion in the asteroid region.

Canup R. M. * Asphaug E. Outcomes of Planet-Scale Collisions [#1952] We present results from a preliminary study of impacts between planet-scale objects. Using an SPH method, we investigate the dependence of the mass and angular momentum contained in ejected debris on the colliding mass, collisional angular momentum, and impact energy.

8 ______32nd LPSC Program Monday, March 12, 2001 PLENARY SESSION MASURSKY LECTURE 1:30 p.m. Room C

Chairs: C. B. Agee D. C. Black

Presentation of the 2000 GSA Stephen E. Dwornik U.S. Citizen Student Award Winners

Solomon S. C. * The Harold Masursky Lecture: An Earth in Moon's Clothing?, or Mercury as an Object Lesson on Approaches to Planetary Exploration [#1345] Two missions to orbit Mercury, MESSENGER and BepiColombo, will be launched this decade. We will explore both the reasons why Mercury exploration has languished for so long and the scientific objectives and expected data sets for the two missions.

32nd LPSC Program------9 Monday, March 12, 2001 CHONDRULES 2:45 p.m. Room A

Chairs: G. E. Lofgren J. N. Grossman

Hood L. L. * Ciesla F. J. The Nebular Shock Wave Model for Chondrule Formation: Constraints Imposed by Chondrule Cooling Rates [#1986] We investigate physical conditions under which the nebular shock wave model for chondrule formation can yield chondrule cooling rates that are consistent with meteoritic constraints. The plausibility of these conditions is then examined.

Desch S. J. * Connolly H. C. Jr. Melting of Chondrules and Type B CAis by Nebular Shocks [#2163] We examine the role of radiation in melting chondrules and type B CAis in nebula shocks. We show that including radiation reduces the cooling rates of these objects to observed values.

Hua X. * Sharp T. G. Polymineralic Inclusions in Chondrule Silicates from Carbonaceous Chondrites: Records of Heating and Cooling in the Early Solar System [#1880] The inclusions within chondrule silicate grains are important because they may provide evidence for chondrule formation processes or parallel processes that could constrain models of the environment and conditions of chondrule formation.

Lofgren G. E. * Evidence for Chondrules Formed by Partial Melting in CR2 Meteorites PCA91082 and EET92042 [#1814] CR2 meteorites PCA91082 and EET92042 contain partially melted (PM) chondrules. PM textures suggest a restricted melting range of 5-60 % which may be a consequence of the high melting temperatures of the Type 1 chondrules in these meteorites.

Jones R. H.* Shearer C. K. Schilk A. J. Trace Element Distribution in anAl-rich Chondrule from the Mokoia CV3 Chondrite [#1338] We have studied an Al-rich chondrule from Mokoia. SIMS analyses of and show that the bulk chondrule REE pattern was originally like group II CAis. The chondrule must have had precursor material that was a condensation product.

Grossman J. N. * Brearley A. J. Chondrules with Inhomogeneous Mesostasis in Highly Unequilibrated Ordinary Chondrites: Further Evidence for Secondary Processing ofChondrules [#1711] A population of chondrules in DOCs contains inhomogeneous mesostasis, with K- and Na-rich areas. These chondrules probably crystallized albite and later experienced open-system aqueous alteration of residual glass to form phyllosilicates.

Beckett J. R. * Stolper E. M. Constraints on the Evolution ofChondrules Based on the Moderately Volatile Elements Sulfur, Sodium, and [#1730] We calculated vapor pressures of gaseous species over molten or partially molten Semarkona chondrules. Type lAs show evidence for partial equilibration with a coexisting gas, losing significant S and generally gaining Na but other chondrules didn't.

10 ______32nd LPSC Program Nagahara H. * Ozawa K. Chemical and Isotopic Fractionation of K During Chondrule Formation in Ambient Gas [#1748] Chemical and isotopic fractionation of K through evaporation and condensation during chondrule formation was experimentally and theoretically investigated. reaction plays a key role for chemical fractionation with scarce isotopic fractionation.

YoungE. D.* Ash R. D. Galy A. BelshawN. S. Isotope Ratio Heterogeneity in Allende Chondrules Determined by UV Laser Ablation and Multicollector ICPMS [#1337] A new UV laser/MC-ICPMS method for obtaining precise measurements of 25Mg124Mg and 2~g/24Mg in situ in geological materials shows that chondrules from the exhibit mass-dependent variations in magnesium isotope ratios > 1%o.

Osada Y. Tsuchiyama A.* Experimental Reproduction of Rims in Barred Olivine Chondrules by Evaporation [#1334] We succeeded in reproducing rims in barred olivine (BO) chondrules in a laboratory by evaporation during cooling in vacuum. This strongly suggests that BO chondrules were formed in an open system. Textures similar to the classic BO were also formed.

32nd LPSC Program------11 Monday, March 12, 2001 VENUS: TEXTURE, TIME, AND TECTONICS 2:45 p.m. Room B

Chairs: R. E. Ernst M.R.Balme

Campbell B. A.* Shepard M. K. Near-Nadir Radar from Venus [#1298] Analysis of Magellan altimeter data using a fractal-surface scattering model.

Carter L. M. * Campbell D. B. Margot J. L. Campbell B. A. Dorris J. R. III Surface Properties ofVenusfrom Arecibo 12.6 em Radar Observations [#1855] We used the Arecibo radar system to create Stokes' parameter .and degree of linear maps of Venus. Two prominent linearly polarized features are near impact craters with associated parabolic deposits. Maxwell Montes also shows some linear polarization.

Cochrane C. G.* Venusian Impact Craters Triangulated by Magellan [#1187] A 3rd SAR image is our only validation for features on Venus <12 km. Magellan imaged all of 36 craters three times, providing a data set that is representative of the crater population as a whole. Its quality is discussed, and an example of radar layover analyzed.

Basilevsky A. T. * Head J. W. III Rates of Volcanism and Rifting on Venus After Formation of Regional Plains [#1047] Analysis of the relation of post-regional plains impact craters to rifts and volcanic deposits shows that rates of rifting and volcanism did not change significantly during this time.

Hansen V. L. * Venus Diapirs: Thermal or Compositional? [#1036] Large plateaus/rises and small coronae reflect diapir size, buoyancy and origin. Large plateau/rise forming thermals rise from the CMBL cooling the core. Small compositional diapirs spawned by broad mantle upwellings form coronae cooling the mantle

Ernst R. E.* Head J. W. III Desnoyers D. W. Grosfils E. B. Geological Implications of Giant Radiating and Linear Systems in Northern Guinevere Planitia/Beta Regio (264-3IrE, 24-60°N), Venus [#1934] A detailed map of radiating and linear graben systems in a 4000 x 4000 km region of Venus is used to explore stratigraphic relationships with plains and fracture belt units and to estimate the global mantle plume abundance.

Tuckwell G. W. * Ghail R. C. A 400 km Scale Strike-Slip Zone near the Boundary of Thetis Regia, Venus [#1562] Detailed structural mapping and analysis has revealed a large-scale strike-slip zone near the boundary of Thetis Regio. The structure shows clear transtensional deformation within an extensional jog, revealing the kinematics of the deformation zone.

Young D. A.* Regional Lineament Patterns in Rusalka Planitia [#1897] Rusalka Planitia, Venus bears a pervasive radial array oflineaments. This presentation will cover the nature, timing and subsequent influence of this structural suite on the planitia's evolution.

Balme M. R. * Sammonds P. R. Vita-Finzi C. Small Scale Tectonism on Venus: An Experimental and Image-based Study [#1318] We present a new, qualatitive methodology, based on fracture mechanics, used to investigate closely spaced parallel fractures on the volcanic plains of Venus.

12 ______32nd LPSC Program Moreels P. * Smrekar S. E. Identification of Polygonal Patterns on Venus Using Mathematical Morphology [#1135] We develop a detection and recognition model to fully automatize the identification of polygonal faults present in many of the Magellan SAR images. Our segmentation model is based on a modified watershed algorithm.

32nd LPSC Program------13 Monday, March 12, 2001 FROZEN MARS: POLAR, GLACIAL, AND COLD THINGS 2:45 p.m. Room C

Chairs: J. M. Moore J. S. Kargel

Zuber M. T. * Wieczorek M.A. The Long-Term Stability of the Martian Polar Caps as Inferred by DIH Ratios and Laser Altimetry Data [#1806] We use martian DIH ratios to constrain the quantity of water that is present in the martian polar caps. By comparing this value with recently derived estimates from laser altimetry data, the evolutionary history of the polar caps can be inferred.

Herkenhoff K. E. * Kirk R. L. MOC Photoclinometry of the Polar Layered Deposits on Mars [#1129] MOC images of the south polar layered deposits show evidence for layering on the same scale as observed in the north polar layered deposits. The layers are -10 m thick, and are expressed as terraces with moderate slope variations.

Hvidberg C. S. * Scarps, Troughs and Ice Flow in the North Polar Cap on Mars [#1663] A coherence between observed surface topography of the north polar ice cap on Mars and flow of the cap is established based on an ice flow model and discussed in relation to accumulation/ablation, scarps, and age of surface layers.

Thomson B. J. * Head J. W. III An Investigation of Proposed Glacial Landforms in the Hellas Basin, Mars [#1374] Mars Orbiter Laser Altimeter (MOLA) and Mars Orbiter Camera (MOC) data are used to examine proposed moraines, esker-like ridges, dissected terrain, and lacustrine deposits in the Hellas Basin and surrounding regions.

Moore J. M. * Wilhelms D. E. Hellas as a Possible Site ofAncient Ice-covered Lakes [#1446] We propose that the interior of Hellas held ice-covered lakes early in Mars history. The best support comes from the correlation of landforms and deposits along the basin periphery at the MOLA-measured --5.8 km contour.

Kargel J. S. * New Evidence for Ancient Glaciation and Modem Debris-covered Glaciers in Nonpolar Regions of Mars [#2079] Mars Global Surveyor images from the Mars Orbiter Camera (MOC) and altimetry data from the Mars Orbiter Laser Altimeter (MOLA) provide new impetus to consider glaciation as an important process in the past and even currently in certain subpolar areas of Mars.

Noe Dobrea E. Z. * J. F. III Composition and Mineralogy of the Martian North Polar Dune Deposits: Constraints from TES and HST Observations [#2099] Analysis of MGS TES spectra of the martian North Polar dune deposits. Mineralogy constrained through the use of a linear mixing model to match minerals from the ASU mineral library to the spectra.

Nolin A. W. * Farrand W. H. Linear Spectral Unmixing oflee and Non-Ice Regions of the North Polar Cap [#1673] Spectral mixture analysis of merged MOC and MOLA data over the North Polar Cap indicate that multiple ice compositions are present on the North Polar Cap.

14 32nd LPSC Program Costard F.* Forget F. Mangold N. Mercier D. Peulvast J.P. Debris Flows on Mars: Analogy with Terrestrial Periglacial Environment and Climatic Implications [#1534] The analogy between debris flows in Greenland (Jameson ) and debris flows on Mars suggest that some of these landforms are only due to the presence of liquid water in the first meters of the martian subsurface. Such interpretation involves some recent climate changes.

Lee P. * Cockell C. S. Marinova M. M. McKay C. P. Rice J. W. Jr. Snow and Ice Melt Flow Features on Devon Island, Nunavut, Arctic Canada as Possible Analogs for Recent Slope Flow Features on Mars [#1809] Based on morphologic and contextual analogs from Devon Island, Arctic Canada, the recent martian slope flow features reported by Malin and Edgett are reinterpreted as being due not necessarily to groundwater seepage but possibly to snow or ice melt.

32nd LPSC Program------15 Monday, March 12, 2001 OUTER BODY EXPERIENCES 2:45 p.m. Room D

Chairs: D. L. Goldsby J. B.

Collins G. C.* Head J. W. III Pappalardo R. T. Nixon B. Giese B. Wagner R. The Formation ofArbela Sulcus and Other Smooth Linear Features on Ganymede: Possible Crustal Spreading and Shear[#1498] Galileo G28 images of Arbela Sulcus, a linear region of bright smooth terrain on Ganymede, suggest formation by crustal spreading and horizontal shear. Is this mode of formation typical for all such regions on Ganymede?

Ghail R. C. Thomas C.* Unravelling the Kinematics ofMarius Regia, Ganymede [#1554] Mapping of northern Regio, Ganymede (from the Galileo G8 image) reveals a long tectonic history of simple block rotations with transtensional and transpressional adjustments, that account for the range of observed structures and terrains.

Hibbitts C. A.* Pappalardo R. Klemaszewski J. McCord T. B. Hansen G. B. Comparing Carbon Dioxide Distributions on Ganymede and Callisto [#1263]

C02 is found in the optical surfaces of Ganymede and Callisto. The C02 is likely hosted in the non-ice materials and is endogenic. Low-energy particles in the magnetosphere alters the surface, increasing the C02 on the trailing side of Callisto.

Lorenz R. D. * Of Course Ganymede and Callisto Have Oceans: Application of a Principle ofMaximum Entropy Production to ley Satellite Convection [#1160] Internal oceans on Ganymede, Callisto and Titan are predicted by the principle that convective heat flows self- organize to maximize their production of entropy. This idea also works for the Earth's interior and the climates of Mars, Titan and Earth.

Mosqueira I. * Estrada P.R. Cuzzi J. N. Squyres S. W. Circumjovian Disk Clearing After Gap-Opening and the Formation of a Partially Differentiated Callisto [#1989] We look into the possibility that Callisto's accretional history straddled the time during which Jupiter opened a gap in the solar nebula and occurred over an extended period from a very extended very low density disk.

McCord T. B.* R. H. Baines K. Bellucci G. Bibring J.-P. Buratti B. Cappaccioni F. Cerroni P. R.N. Coradini A. Cruikshank D. Drossart P. Formisano V. Jaumann R. Langevin Y. Matson D. M. Mennella V. Nelson R. P. Sicardy B. Sotin C. Hansen G. B. Hibbitts C. A. Galilean Satellite Surface Non-Ice Constituents: New Results from the Cassini/Huygens VIMS Jupiter Flyby in the Context of the Galileo NIMS Results [#1247] The Casssini mission VIMS is currently returning data for the Galilean . Examples of the new satellite data and the initial interpretations will be presented in the context of the Galileo NIMS data and results.

Hogenboom D. L. * Kargel J. S. M. E. Stable and Metastable High Pressure Phases of the Sulfuric Acid-Magnesium Sulfate-Water System: Applications to Europa [#1739] Experimental study of the pressure dependence of eutectic melting and metastable transitions in the H2S04-H20 system and H2S04-MgS04-H20 system. Eutectic shifts toward water-rich compositions with increased P to 200 MPa much like MgS04-H20 system.

16 ______32nd LPSC Program Dunand D. C. Schuh C. Goldsby D. L. * Pressure-induced Transformation Plasticity of Water Ice [#1923] Transformation plasticity (TP) is a low-viscosity deformation mechanism which occurs during phase transformation of a low-stressed material. Pressure-induced TP may be important for the dynamics of icy satellites and the earth's interior.

Grasset O. * Mevel L. Mousis O. Sotin C. The Pressure Dependence of the Eutectic Composition in the System MgS04-H20: Implications for the Deep Liquid Layer of Icy Satellites [#1524] Experiments on the MgS04-H20 system in the range [0- 1 GPa]- [100- 300 K] are conducted. Results on the stability of sulfate hydrates will be presented. Implications for the endogenic processes occurring within icy satellites will be discussed.

Dalton J. B. III* Curchin J. M. Clark R.N. Temperature Dependence of Cryogenic Ammonia-Water Ice Mixtures and Implications for Icy Satellite Surfaces [#1496] Infrared spectra of ammonia-water ice mixtures reveal temperature-dependent absorption bands due to ammonia. These features, at 1.04, 2.0 and 2.25 microns, may shed light on the surface compositions of the Galilean and Saturnian satellites.

32nd LPSC Program------17 Tuesday, March 13, 2001 CHONDRITES: NEBULAR AND PARENT-BODY PROCESSES 8:30 a.m. Room A

Chairs: H. Nagahara T. G. Sharp

Inaba H. Tachibana S. Nagahara H. * Ozawa K. Condensation Kinetics of Forsterite [#1837] Evaporation experiments offorsterite in the presence of own gas have been carried out with the Knudsen technique. The condensation coefficient is obtained, and the results are applied to evaluate the growth of forsterite grain in the solar nebula.

Petaev Mi. I.* J. A. Meibom A. Krot A. N. Keil K. A Thermodynamic and Kinetic Model of Metal Condensation: Implications for the Evolution of the Nebular Source Regions of Chondrites [#1657] Modeling growth and simultaneous diffusional equilibration of the zoned metal grains in CH chondrites reveals that the condensation zoning profiles were substantially modified by diffusion while the grains were growing in the nebula.

Xiong Y.-L. * Hewins R. H. Growth of Zoned Fe-Ni Metal Grains by Condensation: The Cooling Rate Constraint Inferred from Experimental Studies Under Nebular Conditions [#1125] Using a typical radius of -100 microns for zoned Fe-Ni metal grains in QUE94411 and P AT91546 as a constraint, we model the growth of zoned Fe-Ni metal grains by condensation as a function of cooling rate. The preferred cooling rate is - 0.04K/hr.

Tachibana S. * Nagahara H. Ozawa K. Condensation Kinetics of Metallic Iron and Its Application to Condensation ofMetal in the Solar Nebula [#1767] Condensation kinetics of metallic iron has been investigated based on evaporation experiments under controlled ambient vapor pressure conditions to discuss the condensation behavior of metal grains in the solar nebula.

Zega T. J. * Lauretta D. S. Buseck P. R. An Experimental Investigation ofFe-Si Alloy Corrosion in the Solar Nebula [#2165] We have performed an experimental study ofFe-Si alloy corrosion under dust-rich nebular conditions. The reaction products are silica and fayalite.

Campbell A. J. * Humayun M. Weisberg M. K. Siderophile Element Concentrations in Bencubbinite Metals [#1842] Trace siderophile element measurements are presented for metal grains in Bencubbin, Gujba, Weatherford, and Hammadah a! Hamra 237. Proposed formation mechanisms for this metal are evaluated.

Kallemeyn G. W. * Rubin A. E. Wasson J. T. Compositional Studies of Bencubbin Dark Silicate Host and an OC Clast: Relationships to Other Meteorites and Implications for Their Origin [#2070] New compositional analyses ofBencubbin and Gujba host materials and an OC clast from Bencubbin are presented. Their relationship to other meteorites and their origin by condensation processes in the solar nebular or an impact plume are discussed.

Kojima T. * Lauretta D. S. Buseck P. R. -Silicate-M eta[ Inclusions and Rims in the Bishunpur LL3.1 Chondrite: Products of Impact-induced Sulfur Mobilization on a Primitive Asteroid [#1250] Dark-colored inclusions and chondrule rims in Bishunpur consist of silicate and minor metal fragments individually surrounded by troilite. The texture and mineralogy suggest that they formed by mobilization of troilite during an .

18 ______32nd LPSC Program Reisener R. J. * Petaev M. I. Goldstein J.l. Olivine Zoning and Retrograde Olivine-Orthopyroxene-Metal Equilibration in Types 5 and 6 Ordinary Chondrites [#1735] We observed systematic olivine Fa zoning near olivine-metal interfaces in types 5 and 6 ordinary chondrites. A thermodynamic study suggests that the olivine zoning formed by localized silicate-metal reactions during metamorphic cooling.

Humayun M. * Campbell A J. The Duration of Metamorphism Inferred from Tungsten Microdistribution in OC Metal [#2102] This presentation describes W and Re behavior during ordinary chondrite metamorphism with implications for the duration of parent body metamorphism derived from Hf-W chronology. van der Bogert C. H. * Schultz P. H. Spray J. G. Impact-darkening Via High Strain-Rate Deformation During Impact: Spectral and Chemical Analyses [#2167] The behavior of FeNi and FeS as darkening agents in the experimental friction-melts differs between L and H compositions, a difference which also appears in some black ordinary chondrite spectra.

Sharp T. G.* Xie Z. Tornioka N. Shock-induced Melt Veins in Chondrites: Crystallization History vs. Shock History [#2159] We have examined 11 melt-vein-bearing L chondrites that range from shock stage S3 to S6 to determine how melt- vein texture and mineralogy correlate with the shock stage. Textural and mineralogical evidence indicates crystallization during adiabatic decompression.

Harvey R. P. * Meibom A. Haack H. Possible Meteorite Stranding Surfaces on the Greenland Ice Sheet [#1287] Using lessons learned in , we have critically examined regions of the Greenland icecap in an effort to locate potential meteorite surfaces. Several sites in Northeast Greenland are excellent prospects.

32nd LPSC Program------19 Tuesday, March 13, 2001 IMPACT EJECTA AND MORE 8:30a.m. Room B

Chairs: C. Koeberl D. A. Kring

O'Keefe J.D.* StewartS. T. Ahrens T. J. Chicxulub Ejecta Dynamics [#2190] We modeled in detail the ejecta dynamics associated with the Chicxulub impact. We determined: 1) ejecta trajectories, 2) stratigraphic motions, 3) depth of ejecta stages, 4) thermodynamic histories of the ejecta particles, and 5) the final ejecta distribution.

Kring D. A. * Durda D. D. The Distribution of Wildfires Ignited by High-Energy Ejecta from the Chicxulub Impact Event [#1447] The distribution of high-energy ejecta from the Chicxulub impact event was heterogeneous and, thus, so was atmospheric heating. Wildfires likely occurred in North America, South America, , and Asia, but fires elsewhere depend on the trajectory of the projectile.

Pierazzo E. * Climate Forcing from the Stratospheric Injection of Impact-produced Sulfur [#1196] This work assesses the climate forcing associated with the stratospheric production of sulfate aerosols from the reaction of various loads of S-bearing gases and released during the Chicxulub impact event, 65 Myr ago.

Dahl J. M. * Schultz P. H. Measurement of Oblique Impact-generated Shear Waves [#1429] Experimental strain measurements reveal that oblique impacts can generate shear waves with displacements as large as those in the P-wave. Large oblique impacts may thus be more efficient sources of surface disruption than vertical impacts.

Artemieva N. A. * Production in Oblique Impacts [#1216] Results of 3D numerical modeling of oblique impacts and melt ejection show that high velocity (35-40 km/s) impacts into a dry target at impact angles of 30 to 50 degrees seems to be the best candidates for tektite-productive events.

Wasserman A. A.* Melosh H. J. Chemical Reduction of Impact Processed Materials [#2037] Impact melts and other products of rapid heating and cooling of silicates often contain very reduced species. This work models a simple system, silica liquid condensing from a vapor, to investigate oxygen depletion in more complicated systems.

Liu S. * Glass B. P. Ngo H. H. Papanastassiou D. A. Wasserburg G. J. Sr and Nd Data for Upper Eocene Spherule Layers [#1819] Sr and Nd data for cpx spherules from three sites support conclusions that there is only one cpx spherule layer and that the source crater may be Popigai. Sr and Nd data for rnicrotektites from a site in the S. Ocean suggest that they do not belong to theN. A. .

Koeberl C.* Kruger F. J. Poag C. W. Geochemistry of Surficial Sediments near the Chesapeake Bay Impact Structure and the Search for Source Rocks of the North American Tektites [#1333] The chemical and isotopic composition of Paleocene to mid Eocene sediments from the Chesapeake Bay crater area was found to differ from that of average North American tektites.

20 32nd LPSC Program Osinski G. R. * Spray J. G. Highly Shocked Low Density Sedimentary Rocks from the Haughton Impact Structure, Devon Island, Nunavut, Canada [#1908] We present the preliminary results of a detailed investigation of the shock effects in highly shocked, low density sedimentary rocks from the Haughton impact structure. We suggest that some textural features can be explained by carbonate-silicate immiscibility.

Skala R. * Zak K. Stable Isotope Study of Carbonates from the Ries Meteorite Crater- Evidence for Impact-induced Carbonate Decomposition [#1572] Stable isotope composition of carbonates from suevite of the Ries crater differs from that of pre-impact target 18 materials. Samples of low <5 0 could probably represent carbonates formed by back-reaction of evolved C02 with residual CaO.

Simonson B. M. * B. Claeys P. Spherules in a Paleoproterozoic Dolomite Layer in the Ketilidian Orogen of South Greenland are Candidates for Ejecta from the Vredefort Structure [#1142] Millimeter-scale spherules form -18% of a single meter-thick dolomite layer in the Ketilidian orogen. Previously thought to be microfossils, their splash-form shapes and replaced spinels(?) suggest they are impact ejecta potentially coeval with Vredefort.

Becker L. * Poreda R. J. Planetary Gases and Fullerenes at the Permian-Triassic Boundary [#2039] Fullerenes (C60 to C200) containing trapped noble gases with ratios indicating a "planetary" component, the most common noble gas signature in carbonaceous chondrites, have been detected in sediments coincident with the Permian-Triassic boundary.

32nd LPSC Program------21 Tuesday, March 13, 2001 MARS: GEOPHYSICS AND INTERIOR EVOLUTION Session dedicated to the memory of William M. Kaula 8:30 a.m. Room C

The planetary geoscience community lost the participation of one of its most enthusiastic and accomplished contributors when William M. Kaula died on April!, 2000, at the age of73. A graduate of the U.S. Military Academy, Bill was trained as a geodesist at Ohio State University, where he obtained a Master's degree under Weikko Heiskanen. After duty with the Army Corps of Engineers, Kaula was hired by John A. O'Keefe to positions at the U.S. Army Map Service and later the NASA Goddard Space Flight Center. During his tenure at those two institutions, Kaula pioneered the conceptual and analytical tools that established the field of space geodesy. Many of these contributions were codified in his 1966 monograph, Theory of Satellite Geodesy, a landmark work that had been long out of print before being reissued by Dover Publications late last year. Kaula accepted a professorship at UCLA in 1963, where he remained for the duration of his career, except for a three-year leave as Chief of the National Geodetic Survey. Once at UCLA, Kaula turned his principal interests from geodesy to geophysics and planetary physics. He served as the Principal Investigator for the Apollo laser altimeter experiment, which provided the first quantitative information on lunar nearside-farside differences in and crustal structure. He was an active member of the Pioneer Venus radar mapper experiment team and the Radar Investigation Group for the Magellan mission. Scientifically Bill wrestled with many of the most difficult issues in planetary formation and comparative planetary evolution, with a notable focus in recent years on the causes of the different evolutionary tracks of Venus and Earth. His legacies are a large body of influential papers, a host of superb graduate students, and an enduring memory to many as a broadly erudite role model noted for quantitative rigor and the use of sweeping syntheses of geophysical and geochemical information to advance our understanding of planetary processes. - Sean Solomon

Chairs: D. L. Turcotte E. M. Parmentier

Smith D. E.* Zuber M. T. MOLA Science Team A Mars' Year of Topographic Mapping with the Mars Orbiter Laser Altimeter [#1959] MOLA has operated at Mars for a full Mars year and provided a new geodetic and geophysical view of the planet. As the spacecraft enters into the Extended Mission MOLA will concentrate its observations on the seasonal variability of the icecaps and martian clouds.

McGovern P. J. * SolomonS. C. D. E. Zuber M. T. G. A. Head J. W. III R. J. SimonsM. Gravity/Topography Admittances and Lithospheric Evolution on Mars: The Importance of Finite-Amplitude Topography [#1804] We calculate localized gravity/topography admittances for Mars, in order to estimate elastic lithosphere thickness. A finite-amplitude correction to modeled gravity is required to properly interpret admittances in high-relief regions of Mars.

Turcotte D. L. * Shcherbakov R. Malamud B. D. Kucinskas A. B. Analyses of Mars Topography, Gravity and Aroid: Implications for Tharsis and Hellas [#1006] Correlations between topography, gravity, and aroid can provide important constraints on the structure and tectonic evolution of Mars.

Nimmo F.* Crustal and Elastic Thickness Estimates at the Martian Hemispheric Dichotomy [#1370] Gravity and topography give an elastic thickness at the crustal dichotomy of less than 20 km. If isostatically compensated, the mean crustal thickness is about 50-75 km, similar to previous independent estimates.

22 ______32nd LPSC Program Zhong S. * Long-Wavelength Topography and Gravity Anomalies of Mars and Their Implications to the Formation of Tharsis Rise [#2124] We study internal and surface loading for Mars with viscous and viscoelastic rheology. We show that convection models with a viscous rheology greatly overestimate the and that the low degree geoid may be largely induced by surface loading of the Tharsis.

Parmentier E. M. * Zuber M. T. Relaxation of Crustal Thickness Variations on Mars: Implications for Thermal Evolution [#1357] A long wavelength crustal thickness variation on Mars, plausibly dating from early crustal differentiation, constrains the thermal evolution, particularly the amount of secular cooling of the mantle or rate of convective heat transfer.

Kiefer W. S. * Mantle Convection on Mars with Enhanced Crustal Radioqctivity: Implications for Geophysical and Geological Observables [#1949] I use finite element simulations to study the effect of enrichments in crustal radioactivity on the nature of mantle convection on Mars. I consider the effects on mantle temperature, mechanical lithosphere thickness, magma production, and the core heat flux.

McLennan S. M. * Crustal Heat Production and the Thermal Evolution ofMars [#1349] The crust of Mars has an LILE-enriched basaltic composition on average, and greater than 50% of the planet's heat producing elements were differentiated into the crust very early in Mars' history.

Hess P. C. * Parmentier E. M. Implications of Magma Ocean Cumulate Overturn for Mars [#1319] Differentiation of a martian magma produced a gravitationally unstable cumulate pile resulting in cumulate overturn and an iron-rich lower mantle.

Schmerr N.C. * Fei Y. Bertka C. Extending the Solidus for a Model Iron-rich Martian Mantle Composition to 25 GPa [#1157] Multianvil experiments utilizing a model anhydrous martian mantle composition were used to determine the solidus. This study provides solidus data for this model composition at the mid-mantle (15 GPa) to core/mantle boundary (25 GPa) of Mars.

Arkani-Hamed J. * Paleomagnetic Pole Positions and Reversals of Mars [#1478] The paleomagnetic pole positions determined from small isolated magnetic anomalies of Mars are largely cluster in a circle of 1500 km radius centered at 5N,45W. Also, the magnetization directions of some nearby magnetic anomalies suggest the core field reversals.

Hood L. L. * Zakharian A. Modeling and Paleomagnetic Pole Positions for Two Magnetic Anomalies in the Northern Polar Region of Mars [#2142] An analysis of MGS magnetometer data from the northern polar region yields estimates for paleomagnetic pole positions for two anomalies that are located in a region north of and south of the present rotational pole.

32nd LPSC Program------23 Tuesday, March 13, 2001 LUNAR IMPACTS: PROCESSES AND EFFECTS 8:30 a.m. Room D

Chairs: B. A. Cohen H. H. Schmitt

Cohen B. A * Taylor L. A Nazarov M. Dhofar 026: A Second-Generation Impact Melt [#1404] Petrology and mineral-chemistry of lunar highlands meteorite Dhofar 026 show that it is a crystalline impact melt of FAN-type materiaL Crystalline spherules within the meteorite are earlier impact melt fragments derived from a basaltic precursor.

Nishiizumi K. * Caffee M. W. Exposure Histories of Lunar Meteorites Northwest Africa 032 and Dhofar 081 [#2101] We measured cosmogenic nuclides, 36Cl, 26Al, and 1'13e in Northwest Africa 032 and Dhofar 081lunar meteorites. The ejection depths, exposure ages, and terrestrial ages of two lunar meteorites were investigated.

Zeigler R. A* Jolliff B. L. Wang A Korotev R. L. Kremser D. T. Haskin L. A Formation of Carbonate and Oxyhydroxide Minerals by Impact ofa Volatile-rich Body [#1243] Lunar particle 65903,16-7 shows evidence for in-situ formation of siderite and possibly goethite by a fluid derived from the impact of a volatile-rich body. The presence of siderite and goethite is confirmed by EMPA and Raman spectroscopy.

Floss C. Crozaz G. * Terrestrial Alteration of Lunar Meteorites Dar AI Gani 262 and 400 [#1105] SIMS measurements of lunar meteorites DaG 262 and 400 show that some phases are affected by terrestrial alteration, resulting in elevated LREE, Sr and Ba. However, other phases are unaltered and suggest affinities to FANs and Mg-suite highland rocks.

Halekas J. S. * Mitchell D. L. Lin R. P. Frey S. Hood L. L. Acuna M. H. Binder A Lunar Crustal Magnetism: Correlations with Geology [#1449] With Lunar Prospector reflectometry data we now have sufficient surface coverage to allow detailed comparisons between crustal magnetism and geology. We find substantial evidence that lunar magnetism is dominated by the effects of impact processes.

Wieczorek M. A * Zuber M. T. A Serenitatis Origin for the Imbrian Grooves and South Pole-Aitken Anomaly [#1403] Antipodal to the Imbrium basin is a distinctive geomorphologic unit that has been attributed to either the convergence of basin ejecta or seismic energy. We show that ejecta from an oblique Serenitatis impact could have formed the "lmbrian grooves."

Schultz P. H. * Origin and Implications of the Imbrium Sculpture [#1900] The Imbrium Sculpture is proposed to be the result of grazing impacts by spalls from the Imbrium asteroid. This interpretation allows new estimates for the size and impact angle for the Imbrium-forming asteroid.

Haskin L. A. * Basin Contributions to the Stratigraphy of the Landing Site [#1566] Ejecta deposit modeling suggests that the megaregolith at the Apollo 16 landing site is dominated by Imbrium and Serenitatis ejecta, and Nectaris ejecta are a minor component.

Dalrymple G. B. Ryder G.* Duncan R. A Huard J. J. 40Ar-39Ar Ages ofApollo 16 Impact Melt Rocks by Laser Step Heating [#1225] New laser step heating Ar ages on six Apollo 16 impact melts of differing composition are consistent with a lunar cataclysmic impacting era starting at 3.90 Ga and lasting little more than 50 Ma.

24 ______32nd LPSC Program Eugster O. * Terribilini D. Polnau E. J. The Antiquity Indicator 40Ari6Ar for Lunar Surface Samples Calibrated by 235U- 136Xe Dating [#1101] Xe from 235U fission in 74261 allows us to calculate the time, 3.25 Ga ago, when this soil was pre-exposed on the lunar surface to cosmic, solar, and atmospheric particles. A calibration curve for the time dependency of trapped 40ArP6Ar is derived.

Norman M.D. * Bennett V. C. Ryder G. Highly Siderophile (Re-PGE) and Lithophile Element Geochemistry ofApollo 17 LKFM Impact Melts [#1418] Highly siderophile element characteristics of mafic, KREEP-rich impact melts from are consistent with an EH chondrite impactor.

Chen J. H.* Papanastassiou D. A. Wasserburg G. J. Re-Os in Lunar Soils and Meteoritic Siderophiles on the Lunar Surface [#1479] Re-Os isotopes in lunar soils indicate approximately chondritic Re, Os, and Os isotopic compositions and substantial Re/Os fractionation, possibly due to the terminal lunar cataclysm.

Schmitt H. H. * Lunar Cataclysm? Depends on What "Cataclysm" Means [#1133] Combined with the geographical bias of the Apollo landings, the best explanation for an apparent "lunar cataclysm" at 3.9 b.y. is the global effect ofthe ejecta and secondary impacts related to the formation of the large basins.

32nd LPSC Program------25 Tuesday, March 13, 2001 REFRACTORY INCLUSIONS 1:30 p.m. Room A

Chairs: G. J. MacPherson D. S. Ebel

Ebel D. S. * Grossman L. Single Stage Evaporation of Solar Condensate Dust to Make CAis [#2008] Cooling rates and peak T are found, to predict observed chemical and isotopic compositions, and melilite zoning, of Type A and B CAis, by cooling, evaporating, and crystallizing solar condensate precursors instantly heated in 1

microbar pure H2•

Richter F. M. * Davis A. M. Effect of Diffusion on the Kinetic Isotopic Fractionation of Silicate Liquids by Evaporation [#1413] The effects of diffusion on kinetic isotopic fractionation during evaporation of silicate liquids are modeled and applied to the evaporation of CMAS melts and to a recently published discussion of K isotopic fractionation during evaporation.

Ito M. * Yurimoto H. Morioka M. Nagasawa H. 25 Mg Diffusion in Akermanite, Gehlenite and Ak30Geh70 Solid Solution [#1518] We have determined 25Mg diffusion coefficients in endmembers of melilite, iikermanite and gehlenite, and Ak70- Geh30 solid solution crystals along the a-axis, and evaluated the compositional dependence of Mg diffusion coefficient in melili.

Connolly H. C. Jr.* Burnett D. S. Experimental Constraints on Type B CAl Formation: ( 1) f02 Variations in Spinel Minor Element Partitioning, (2) Sub-Solidus Re-Equilibration Effects [#1149] Our experimental results on an average type B CAl for spinel+ liquid field at a range of./02 conditions we show that observed abundances of Ti and V of spinels enclosed by fassaites may have been, at least in part, produced by sub- solidus re-equilibration.

Yurimoto H.* Rubin A. E. Itoh S. Wasson J. T. Non-StoichiometricAl-rich Spinel in an Ultra-Refractory Inclusion from CO Chondrite [#1557] We describe a unique refractory inclusion having nonstoichiometric Al-rich spinel in the exceptionally pristine C03.0 chondrite Yamato 81020. This inclusion was generated by two-stage heating events within a span of 0.2 million years.

Krot A. N. * McKeegan K. D. RussellS. S. Meibom A. Zipfel J. Keil K. 160-poor Refractory Inclusions in CB Chondrites [#1229] CAls from Hammadah a! Hamra 237 and QUE 94411 have 160-poor compositions with ~ 17 0 ranging from -6%o to -10%o for all analyzed minerals (, , melilite, pyroxene, spinel), suggesting formation in an isotopically distinct reservoir.

Kunihiro T. * Nagashima K. Yurimoto H. High Precision Mapping ofO Isotopes of a CAl, HN3-l, Using SIMS with SCAPS [#1585] We develop new isotope imaging technique using a two-dimensional solid-state ion detector. We succeed quantitative three 0 isotope mapping of a CAl, HN3-1, within micron resolution and permil accuracy.

Choi B.-G.* Yurimoto H. Wasserburg G. J. Two Forsterite-bearing Refractory Inclusions in Allende Having Oxygen Isotopic Compositions Similar to Chondrules [#1591] We report two forsterite-bearing refractory inclusions in Allende. They consist of spinel, olivine, pyroxene (and anorthite) and 0-isotopic compositions of the minerals are similar to chondrules in carbonaceous chondrites.

26 ______32nd LPSC Program Imai H. * Y urimoto H. Two Generations of Olivine-Growth in an Amoeboid Olivine Aggregate from the Allende Meteorite [#1580] We present petrologic and oxygen isotopic studies ofMg-rich and Fe-rich olivines in an AOA from the Allende meteorite in order to constrain the formation processes of olivines.

Wasserburg G. J. * Russ G. R. Papanastassiou D.P. The Blue Angel Revisited [#2031] The Blue Angel is a hibonite-rich calcite-bearing CAl from that has condensation textures. We have 6 7 5 measured Al-Mg isotopic systematics by ion probe and find a good with CZ A1P Al)o = 5 X 10- . Implications are discussed.

McKeegan K. D.* Chaussidon M. Krot AN. Robert F. Goswami J. N. Hutcheon I. D. Extinct Radionuclide Abundances in Ca, Al-rich Inclusions from the CV Chondrites Allende and Efremovka: A Search for Synchronicity [#2175] We report new Be-B data on 4 CAis and initial comparisons to the Al-Mg record in the same inclusions.

MacPherson G. J. * Russ G. R. Extinct 10Be in CAis from Vigarano, Leoville, and Axtell [#1882] Evidence for extinct 10:Se was found in three Type A, 1 Type B, and 1 FUN CAis from Vigarano, Leoville, and Axtell. Initial 1 0:Se/~e is in the range 0.6- 1.5 x 10-3 and does not strictly correlate with 26 Al/27 Al, so the two systems are decoupled.

Sugiura N. * Boron Isotopic Compositions in Chondrules: Anorthite-rich Chondrules in the Yamato 82094 (C03) Chondrite [#1277] Boron isotopic compositions and Be/B ratios were measured in anorthite in chondrules. B isotopic anomalies are small. But they appear to be correlated with Be/B ratios, suggesting the presence of live 1 ~e at the time of chondrule formation.

32nd LPSC Program------27 Tuesday, March 13,2001 MARS: MAGNETS, FAULTS, AND REVEALED IMPACTS 1:30 p.m. Room B

Chairs: S. E. Smrekar L. G. J. Montesi

Smrekar S. E. * Raymond C. A. Lithospheric Thickness Variations from Gravity and Topography in Areas of High Crustal Remanent Magnetization on Mars [#2063] Gravity and topography admittance studies are used to examine lithospheric structure in the areas of intense magnetization. Areas with positively magnetized crust appear to have thinner crust and elastic lithosphere than negatively magnetized crust.

Raymond C. A. * Smrekar S. E. Constraints on Sources of Strong Crustal Magnetism in the Southern Highlands ofMars [#2178] Magnetic models, guided by results of gravity-topography admittance studies, suggest that the anomaly pattern in the central southern highlands of Mars results from large blocks of coherently magnetized crust separated by "non- magnetic" areas.

Purucker M. E.* Langlais B. Mandea M. Interpretation of a Magnetic Map of the Valles Marineris Region, Mars [#1865] A magnetic map of Valles Marineris is interpreted in terms of left-lateral faulting, the first evidence for substantial strike-slip faulting here. Surface exposures of highly magnetic material may exist in the walls of Valles Marineris.

Wilkins S. J. * Schultz R. A. Structural Style and Mode of Extension in the Northern Tempe Rift [#1253] We suggest the N. Tempe Rift consists of planar geometries at depth, with some oblique rifting, and a possible asymmetric half-graben structure. Extension is -2 km and appears to systematically decrease along-strike away from Tharsis.

Montesi L. G. J. * Zuber M. T. Crustal Thickness Control on Martian Spacing [#1879] The spacing of wrinkle ridges in the martian northern lowlands is about twice that in ridged plains. This can be explained by the thinner crust in the lowlands: there is no ductile lower crust, making the brittle upper lithosphere twice thicker.

Tate A. * Golombek M.P. Mueller K. J. Morphology of Wrinkle Ridges on Lunae and Solis Plana, Mars from MOLA Topography: Implications for Their Kinematic Development [#1444] MOLA topography is used to define the detailed morphology and kinematic development of martian wrinkle ridges on Lunae and Solis Plana. Changes in ridge morphology suggest they form as fault-propagation folds, often with significant backthrusts.

Okubo C. H. * Schultz R. A. Elevation Offsets Across Wrinkle Ridges: Key to Structural Width [#2086] In a slope-corrected profile, an elevation offset reflects a baseline termination on the wrinkle ridge. The full structural width of a wrinkle ridge can be measured along a baseline that extends sufficiently such that the elevation offset diminishes to zero.

Schultz R. A.* Fossen H. Watters T. R. Displacement-Length Scaling in 3-D as a Probe of Planetary Fault Dimensions [#1832] Displacement-length scaling of terrestrial and planetary faults provides a useful tool to evaluate their growth histories and dimensions. New scaling relationships for 3-D suggest proportional growth and nonuniform depths of faulting for populations on Mars and Mercury.

28 ______32nd LPSC Program Head J. W. III* Kreslavsky M.A. PrattS. Northern Lowlands on Mars: Evidence for Widespread Volcanic Flooding and Tectonic Deformation in the Early Hesperian [#1063] Detrended northern lowland topography shows that surface deposits are underlain by an Early Hesperian regional volcanic unit with a basin-wide system of sub-parallel wrinkle ridges, part of a global circum-Tharsis system -7000 km wide.

Anderson R. C.* Dohm J. M. Golombek M. Baker V. Ferris J. Hare T. Amazonian Faulting: Is Mars Tectonically Active Today? [#2130] Preliminary analysis of Amazonian structures indicate that Mars may still be tectonically active.

Frey H. V. * Shockey K. M. Frey E. L. Roark J. H. Sakimoto S. E. H. A Very Large Population of Likely Buried Impact Basins in the Northern Lowlands ofMars Revealed by MOLA Data [#1680] High resolution MOLA data have revealed a large number of subdued quasi-circular depressions (QCDs) >50 km diameter in the northern lowlands of Mars which are generally not visible in Viking imagery and which may be buried ancient impact basins.

Kreslavsky M.A. * Head J. W. III Stealth Craters in the Northern Lowlands of Mars: Evidence for a Buried Early Hesperian Unit [#1001] Numerous shallow smooth circular depressions in the northern lowlands of Mars are impact craters on an Early Hesperian substrate covered with the Vastitas Borealis Formation material.

32nd LPSC Program------29 Tuesday, March 13,2001 A YEAR NEAR EROS 1:30 p.m. Room C

Chairs: A. F. Cheng J. L. Hinrichs

Trombka J. I.* Squyres S. W. Bruckner J. Boynton W. V. Reedy R. C. McCoy T. J. Gorenstein P. L. G. J. R. Starr R. D. Nittler L. R. Murphy M. E. Mikheeva I. McNutt R. L. Jr. McClanahan T. P. McCartney E. Goldstein J. O. Gold R. E. Floyd S. R. Clark P. E. Burbine T. H. Bhangoo J. S. Bailey S. H. Petaev M. The Chemical Composition ofAsteroid 433 Eros: End of Mission Results of the NEAR Shoemaker X-Ray/Gamma-Ray Spectrometer [#1920] Status of the NEAR X-ray/gamma-ray spectrometer, end of mission status.

Burbine T. H.* McCoy T. J. Nittler L. R. Bell J. F. III Could 433 Eros have a Primitive Achondritic Composition? [#1860] One of the goals of the NEAR (Near Earth Asteroid Rendezvous) mission to 433 Eros is to determine if it has a meteoritic analog. We are currently investigating if primitive achondrites have bulk compositions and spectral properties similar to Eros.

Murchie S. * Robinson M. Clark B. Thomas P. Joseph J. Domingue D. Li H. Bussey B. Veverka J. Izenberg N. Color Variations on Eros from NEAR Shoemaker Multispectral Imaging [#1614] Eros's surface exhibits large albedo variations due to exposure of bright materials on slopes. A difference in the relationship of albedo and color between Eros and the moon shows that space 's effects are different on Eros.

Izenberg N. R. * Bell J. F. III Clark B. E. Murchie S. L. Gaffey M. Wellnitz D. McFadden L. K. Robinson M. S. Comparison of Color and Spectral Properties of Eros Using NIS Plus MSI [#2083] This abstract presents preliminary correlation and comparison of NIS and MSI spectral data. MSI short wavelength data is added to NIS spectra to produce more robust spectral analysis of the surface of Eros.

Kelley M. S. * Gaffey M. J. Vilas F. Hardersen P. S. Recent, Ground-based, Near-Infrared Spectral Observations ofAsteroid 433 Eros [#2112] New, ground-based, near-IR data were obtained for NEA 433 Eros using the SpeX instrument at the NASA Infrared Telescope Facility. Results of spectral analyses will be compared with previous work, and compositional interpretations will be discussed.

Lucey P. G. Himichs J. L. * Urquhart-Kelly M. Wellnitz D. Bell J. F. III Clark B. E. Thermo-Reflectance Spectra of Eros: Unambiguous Detection of Olivine [#1490] Olivine is readily detected on 433 Eros using the new thermo-reflectance spectral technique applied to near-IR spectra obtained at Eros by the NEAR spacecraft.

Robinson M. S. * Thomas P. C. Veverka J. Murchie S. L. Barnouin-Jha O. Bussey D. B. J. The Geology of Eros [#2134] Eros is highly irregular in shape, is marked by a variety of structural features, and is strikingly rounded and degraded at all scales. High resolution images (1 m/pixel) reveal a complicated surface layer with much evidence for a widespread mobile regolith.

Prockter L. M. * Thomas P. C. Joseph J. Robinson M.S. A. Bussey D. B. J. Veverka J. Murchie S. Cheng A. MSIINIS Team Structural Geology of Eros from NEAR Shoemaker Imaging [#1947] Using images from the NEAR Shoemaker mission, we present results on the structural geology of Eros.

30 ______32nd LPSC Program Wilkison S. L. * Robinson M.S. Thomas P. C. Veverka J. McCoy T. J. Murchie S. L. Prockter L. Yeomans D. K. The Porosity of Eros and Implications for Its Internal Structure [#1721] We estimate the porosity of Eros to be between 21-33%. Based on this porosity range and morphologic observations of the surface, we suggest that the asteroid is heavily fractured (but not a rubble pile).

Asphaug E.* P. J. M. R. Merrifield M. R. Brazil Nuts on Eros: Size-Sorting ofAsteroid Regolith [#1708] We consider the hypothesis that frequent cratering produces size- or compositionally-sorted asteroid regolith, affecting the structure, texture, and in extreme cases the shape of asteroids.

Barnouin-Jha O. S. * Garvin J. B. Cheng A. F. Zuber M. Smith D. Neumann G. Murchie S. Robinson M. Veverka J. Preliminary Impact Crater Dimensions on 433 Eros from the NEAR Laser Rangefinder and Imager [#1786] We report preliminary observations obtained from the NEAR Laser Rangefinder (NLR) and NEAR Multispectral Imager (MSI) for -300 craters seen on 433 Eros to address Eros crater formation and degradation processes.

Cheng A. F.* Bamouin-Jha 0. S. Zuber M. T. Veverka J. Smith D. E. Neumann G. A. Robinson M.S. Thomas P. C. Garvin J. B. Murchie S. L. C. R. Prockter L. Fractal Analyses of Small Scale Features on Eros [#2041] We will discuss the fractal nature of surface structures on asteroid 433 Eros.

Bell J. F.* Eros: A Comprehensive Model [#1964] The NEAR spacecraft has discovered a unique crater size distribution on Eros strongly deficient in small craters, and a remarkable abundance of boulders. These results can be explained if the asteroid belt is severely depleted in small objects by the Y arkovsky Effect.

32nd LPSC Program------31 Tuesday, March 13, 2001 IMPACT CRA TERING 1:30 p.m. Room D

Chairs: W. U. Reimold G. Ryder

Reimold W. U. * Gibson R. L. Dressler B. O. Pseudotachylites, Pseudotachylitic Breccias, and Other Melt Breccias in Impact Settings- A Discussion [#1033] A variety of melt breccias of impact and/or tectonic origin may occur in impact settings. Differentiation, classification, and models of origin for such breccias are discussed, with special reference to the Vredefort Structure.

Jurena D. J. * French B. M. Gaffey M. J. Planar Deformation Feature Orientations and Distribution in Quartz Grains from the Carrizo Sand Formation in South Texas: Relation to the Bee Bluff Structure [#1828] The Bee Bluff structure has been debated as to its possible impact origin. We have found PDF's there in a higher concentration than in other locations and having dominant orientation patterns consistent with impacts in porous sedimentary rocks.

Miura Y. * Rampino M. R. Kedves M. Uedo Y. Maeda T. Shocked Quartz and Diaplectic Glass at Miura (Kagawa-Takamatsu) Crater, Japan -New Evidence for an Impact Origin [#1981] Recent sampling has produced evidence of shocked quartz and diaplectic glass with suevite-like rocks, confirming the impact origin of Miura (Kagawa-Takamatsu) crater, Japan.

El Goresy A. * Chen M. Gillet Ph. Dubrovinsky L. Graup G. Two Novel Shock-induced Very Dense Polymorphs of Rutile in Suevite from the Ries Crater, Germany: Implications for Peak-Shock Pressures and Post-Shock Temperatures [#1084] We report two new natural shock-induced very dense polymorphs of rutile from suevites of the Ries Crater, Germany. This finding sets entirely new parameters for a robust estimation of peak-shock pressures and post-shock temperatures not accounted for before.

DeCarli P. S. * Bowden E. Sharp T. G. Jones A. P. Price G. D. Evidence for Kinetic Effects on Shock Wave Metamorphism: Laboratory Experiments Compared with Inferences from Studies of Natural Impact Craters [#1822] Laboratory calibrations of shock metamorphism are in substantial disagreement with inferences from studies of material in natural large impact craters. This disagreement is interpreted as evidence for kinetic effects.

Gibson R. L. * Reimold W. U. Ashley A. J. Koeberl C. Shock Pressure Distribution in the Vredefort Impact Structure, South Africa: Evidence from and Ferromagnesian Minerals [#1012] A petrographic study of the Archean gneisses of the core of the Vredefort structure revealed widespread evidence of shock deformation and shock melting in feldspar and ferromagnesian minerals. Processes involved in their formation are discussed.

Ryder G.* Mass Flux During the Ancient Lunar Bombardment: The Cataclysm [#1326] The mass of projectiles hitting the Moon during the Nectarian-Early Imbrian epochs is incompatible with a smooth decline in impacting from crustal formation and was a cataclysm in the Earth-Moon system. Its intensity on Earth could not sterilize oceans.

32 32nd LPSC Program Head J. N. * Lunar Meteorite Source Crater Size: Constraints from Impact Simulations [#1768] Hydrocode simulations -show that craters 450 m across are viable sources of the lunar meteorites. The number of such craters expected to form in the last 0.1 Ma agrees with the CRE data. Samples from older events are underrepresented.

Herrick R. R. * The Impact Angles of Different Crater Forms on Venus and the Moon [#1902] Surveys of the Venusian and lunar crater populations were performed to empirically determine the onset angle of various oblique impact forms.

Grey I. D. S. * Burchell M. J. Johnson E. Hypervelocity Impact Craters in Ammonia-Water Ice [#1200] We present new data on hypervelocity impacts using spherical! rom diameter stainless steel projectiles at velocities of 5 km s-1 were incident onto thick ice targets of water and ammonia-water mixes at a temperature of 153 K.

StewartS. T. * O'Keefe J.D. Ahrens T. J. The Relationship Between Rampart Crater Morphologies and the Amount of Subsurface Ice [#2092] We characterize the effects of ground ice on martian rampart crater formation and describe the relationships between the amount of ice and observable crater features, which may be used to map subsurface ice content.

Baratoux D. B. * Delacourt C. D. Allemand P. A. Rheology of Megaregolith from Wave Length of Martian Lobate Ejecta Deposits [#1312] The sinuosity of lobate martian craters is analysed using image analysis techniques. From dimensional analysis, we demonstrate that the wave length of the lobes allow us to obtain some quantitative results on the rheology of the megaregolith during the impact event.

Schultz P. H.* Mustard J. F. Impact Glass Strewnfields on Mars [#1668] New experimental results allow first-order estimates for the downrange ejecta velocity distribution. When applied to Mars, they predict strewnflelds from oblique impacts, consistent with MOC and TES results.

32nd LPSC Program------33 Tuesday, March 13, 2001 POSTER SESSION I 7:00--9:30 p.m. UHCL

Mars: Wrinkled and Ridged

Wilson L. Head J. W. III Giant Dike Swarms and Related Graben Systems in the Tharsis Province of Mars [#1153] We model the rise of magmas from mantle plume heads to form giant dike swarms and related graben on Mars. Measurements on graben in SW and S Tharsis begin to constrain dike magma densities and regional stress conditions at the time of emplacement.

Costard F. Mangold N. Peulvast J.P. Structural Control for Catastrophic Debris Flows on Mars [#1535] The aim of this study is to suggest a relationship between tectonic features (wrinkle ridges), the presence of subsurface volatile materials and the observed large-scale debris flows on Mars.

Wilkins S. J. Schultz R. A. J. G. Modeling Scarp Evolution: Potential to Date Faulting and Paleoshorelines on Mars [#1254] We present the first considerations and examples of the diffusion equation applied to model scarp evolution on Mars. Scarp morphology has considerable potential to provide a quantitative measure of the timing of fault and paleoshoreline formation.

Silver M. H. Gendaszek A. S. Grosfils E. B. Sakimoto S. E. H. Mendelson C. V. Bleacher J. E. Wrinkle Ridge Formation North ofOrcus Patera, Mars [#1043] We use topography data obtained from the Mars Orbiter Laser Altimeter to characterize the morphology of wrinkle ridges north of Orcus Patera. Our results compare well to the predictions of models which support deep fault penetration.

Goudy C. L. Gregg T. K. P. Possible Mechanisms of Stress in , Mars; Digital Analysis of Mare-type Wrinkle Ridges [#1393] The origin of orthogonal mare-type wrinkle ridges within Hesperia Planum, Mars, is unknown. We are applying GIS techniques to determine their formation.

HoffmanN. Structural State of Mars from MOLA Implies a Cooling Planet [#1494] Most terrains on Mars show evidence of late-stage contraction of the surface. The lithosphere of Mars has also thickened with time and volcanism reduced, implying that significant net planetary cooling has occurred, similar to Mercury.

Mars Channels, Lakes, and Oceans

Berman D. C. W. K. Burr D. M. Marte Vallis and the Cerberus Plains: Evidence of Young Water Flow on Mars [#1732] We examine the relationship between apparent fluvial channels and lava flows among the young lavas of the Elysium plains and Cerberus plains. A sequence of lava flows and water release appears to have occurred extending into recent geologic time.

34 ______32nd LPSC Program Moller S.C. Poulter K. E. Grosfils E. B. Sakimoto S. E. H. Mendelson C. V. Bleacher J. E. Morphology of the Marte Valles Channel System, Mars [#1382] The Marte Valles channel system near Orcus Patera, Mars is reassessed with MOLA topography. We find evidence of ponding, increasing cross-sectional area downstream suggesting multiple sources, and possible intertwined volcanism and water flow.

Nelson D. M. Farmer J.D. Greeley R. Hydrologic History of South Elysium Basin-North Terra Cimmeria Area, Mars [#2069] Geologic mapping of the Terra Cimmeria suggests a prolonged hydrologic history, sustained by tectonic and volcanic interactions with the ground water-crysophere system.

Kereszturi A. Analysis ofthe Meanders of Some Runoff Channels on Mars [#1177] Morphometrical and morphological analysis of runoff cha:{lnels on Mars. Results: possible connection between the meanders' parameters and the channel width, which may be the base of a future method for paleodischarge estimations.

Rosenshein E. B. Greeley R. Arrowsmith J. R. Application of Terrestrial Geomorphic Threshold Theory to the Analysis of Small Channels on Mars [#1921] New terrestrial work on the geomorphic thresholds for channel initiation use the drainage area above a channel head vs. the slope at the channel head to delineate surface process types. This method has been used to characterize martian landscapes.

Craddock R. A. G. A. A C. Howard A. D. High Resolution Morphometric Studies of Martian Valley Networks in the Iapygia Region [#1833] We present detailed information on morphometry in the Iapygia region based on high resolution digital elevation models produced by combining MOLA data with Viking stereophotogrammetric data.

Leone G. Wilson L. Orofino V. Ponti S. Gorgonum Chaos: Are the Seepage-Runoff Features Really Recent? [#1649] We discuss the alleged runoff features in Gorgonum Chaos, Mars, which have been suggested as recent features. We conclude that they are more likely of Amazonian age.

Harrison K. P. Grimm R. E. Martian Hydrothermal Systems: Relationship Between Magnetic Anomalies and Valley Networks [#1441] Hydrothermal circulation may explain the spatial correlation between concentrated magnetic anomalies and valley networks. Numerical models show that hydrothermal discharge spans a comparable range as the inferred discharge from valley networks.

Grant J. A Valley Evolution in Margaritifer Sinus, Mars [#1226] Valley morphometry suggests formation via localized ground-water discharge enabled by surface-fed recharge. Precipitation was largely relegated to subsurface entry by high surface-infiltration capacities. Discharge occurred at exposed aquitards.

Bourke M. C. Zimbelman J. R. Finnegan D. Banerdt B. The Modification of Mars Fluvial Surfaces [#2109] The identification of fluvial deposits on Mars is impaired by modifying geological processes. An analysis of surface patterns of superimposed dunes and channels in paleoflood environments in Washington State and Australia can yield information on buried surfaces.

Irwin R. P. III Howard A. D. Cratering and Fluvial Erosion in Noachian Terra Cimmeria, Mars [#1377] The disruption of catchments by impact craters, divide breaching, valley morphology, and the source of water are discussed for part of the Terra Cimmeria, Mars. Large, integrated catchments are identified that pre-date degraded Noachian craters.

32nd LPSC Program------35 Cabrol N. A. Grin E. A. Wynn- D. D. Prolonged Ponding Episode in C- Crater in Recent Geological Times on Mars [#1255] We present the morphological evidence that supports the existence of a lake in a recent past inC-Newton crater. We assess the astrobiological potential of this environment.

Carter B. L. Frey H. Sakimoto S. E. H. Roark J. Constraints on Gusev Basin lnfillfrom the Mars Orbiter Laser Altimeter (MOLA) Topography [#2042] MOLA topography provides volume estimates for Gusev crater based on higher resolution. Revisiting work previously done by Grin and Cabral (1997), we find a substantial increase in original sedimentation estimates.

Rakonczai J. Hargitai H. Berczi Sz. Comparisons of the Ancient Meandering Riverbeds in the Chryse Region, Mars, and on the Tisza Flooded Basin in the Carpathian Basin, Earth [#1507] Hydrogeomorphologic comparisons of meandering martian riverbeds, Chryse Region, and recent/ancient riverbeds ofTisza, Carpathian Basin imply: (1) presence of flowing water; (2) by left-over valleys a longer history of flowings on Mars.

Mason D. Caddy B. Melchior R. Annexstad J. The Beaches of Lake Agassiz, an Analog for Martian Shorelines [#1397] Similarities between glacial Lake Agassiz shorelines and martian analogs are noted. Reasons for differences are suggested.

Matsui T. Takamiya I. Imamura F. Tajika E. Tsunami Generation and Propagation in Possible Ancient Ocean on Mars [#1716] We study generation and propagation of impact-induced tsunami on Mars by using numerical models. We find that maximum tsunami height is more than 60 m at some coastal regions, which suggests we may find some evidence of tsunami on Mars.

Mars: Small-Scale Surface Features

Rifkin M. K. Mustard J. F. Global Distribution of Unique Surface Processes Imaged by the Mars Orbital Camera [#1698] We have examined more than 8000 high resolution MOC images for evidence of several unique surface morphologies, and mapped the global distribution of these features. The results are presented and discussed here.

Lucchitta B. K. Young Dark Mantles and Light Flows in Valles Marineris, Mars [#2059] MOC images of VM show that most dark materials are wind deposits, but some may come from pyroclastic vents. Light flows and intricate deformations in west Candor may be due to volatiles in interior deposits and mobilization of older layers.

Sullivan R. Modeling Martian Dust Avalanches [#2145] A numerical model for martian dust avalanches has been developed and applied to MOC and MOLA data. Results are consistent with the dust avalanche hypothesis when a reasonable range of material properties is fitted against observations.

Pierce T. L. Crown D. A. Morphologic and Topographic Analyses of Martian Debris Aprons Using Mars Global Surveyor Datasets [#1419] Morphologic and topographic analyses of eastern Hellas debris aprons indicate consistent relationships between distinct surface textures and geomorphic features and constrain emplacement mechanisms.

36 32nd LPSC Program Albin E. F. King J.D. Dark Slope Streaks and Associated Layered Deposits on the Southwestern Floor of Cassini Impact Basin, Mars [#1380] Several recent slope streaks and associated layered deposits, found within the Cassini impact basin, are discussed. A possible mechanism for producing long and continuous slope streaks is considered.

Ormo J. Komatsu G. Rossi A. P. DiSimone S. Thin Linear Features on Mars Visible in MOC Images: The Occurrences in the Bellas Basin [#1517] We performed a systematic analysis of thin linear features (LF) in the Hellas Basin where they are especially frequent. The LF were classified and mapped. The variety in appearance is great, which may suggest different causes for their formation.

HoffmanN. Fresh Polar Channels on Mars as Evidence of Continuing C02 Vapour-supported Density Flows [#1271] A set of gullies and channels is located at 71 o south, within the annual C02 polecap. Mean temperatures are -200 K which implies: 1) At least some of the channels flow on an annual basis 2) Dense C02 vapour-supported flows is far more likely than liquid water.

StewartS. T. Nimmo F. Swface Runoff Features on Mars: Testing the Carbon Dioxide Formation Hypothesis [#1780] We examine the hypothesis that carbon dioxide or clathrate formed the recent martian gullies, and conclude that it is unlikely, based on the likely reservoirs and flow characteristics of these compounds.

JonsH.-P. Morphologic Hints for C02 as Active Agent in Martian Relief Dynamics [#1102] The relief of recently discovered valleys on Mars suggest C02-activities, rather than H20-activities.

Mars Polar

Fishbaugh K. E. Head J. W. III Characterization of Features Associated with Volatile Removal in the Martian North Circumpolar Region [#1426] High resolution MOLA data is used to classify and describe features associated with removal of volatiles in the martian north circumpolar region. Some of these features are linked to retreat of the polar cap, while some may predate cap formation.

Head J. W. III Milkovich S.M. PrattS. Meltback of Hesperian-aged Ice-rich Deposits at the South Pole: Evidence for Pro glacial Drainage Channels and Lakes [#1156] Small channels connect craters adjacent to the decayed remnants of the Dorsa Argentea Formation, suggesting that when meltback occurred, water flooded from crater to crater creating a series of lakes.

Milkovich S.M. Head J. W. III Observations of Layered Deposits in the Northern Polar Region of Mars: A Preliminary Analysis [#1973] We examined MOC images oflayered terrain in the northern polar region of Mars. Individual layers show great variability, indicating that additional processes besides climatic cycles are at work in their formation.

Supulver K. D. Edgett K. S. Malin M. C. Seasonal Changes in Cover in the Martian South Polar Region: Mars Global Surveyor MOC and TES Monitoring of the Richardson Crater Dune Field [#1966] Mars Global Surveyor MOC and TES observations of the dune field in Richardson Crater (72S,180W) are presented. The dune field was observed over the course of four seasons to monitor seasonal changes in temperature, albedo, and frost cover.

32nd LPSC Program------37 Head J. W. III Hallet B. Origin of Sinuous Ridges in the Dorsa Argentea Formation: New Observations and Tests of the Esker Hypothesis [#1373] The characteristics of sinuous ridges on Mars are compared to criteria from glacier physics and Earth field observations for eskers and found to be similar.

Metzger S. M. Re-Exploring the Formation of Martian Sinuous Ridges [#1911] Reinvigorated interest in martian Sinuous Ridges stems from formation interpretations that may provide clues to Mars' past climate. This report will review, summarize, and relate MSR formation models to MGS-testable processes.

Mars Volcanism

Rogers D. Christensen P.R. Bandfield J. L. Mars' Volcanic Surface Compositions: Distributions and Boundaries Examined Using Multiple Orbiter Datasets [#2010] MGS TES data is used at high resolution to map small regions of basalt in Mars' northern hemisphere. With the exception of 2 outliers, the northern extent of the highland basalt appears to correspond with the northern edge of the cratered highlands.

Grier J. Bottke W. Hartmann W. K. Berman D. C. Mars: Chronological Studies of the Large Volcanoes in Tharsis [#1823] We are beginning a study of age and morphology relations among Tharsis volcanics, with crater counts using new age calibrations. On Olympus Mons, averages over large areas give characteristic ages of a few hundred My, but youngest flows have ages in range 5-50 My.

Kallianpur K. Mouginis-Mark P. J. Slopes of Martian Volcanoes [#1258] We use MOLA data to derive slope maps of9 volcanoes on Mars. Tharsis volcanoes have the same shape as Galapagos volcanoes with deep . Alba Patera is very similar to Tyrrhena Patera. Slopes greater than 7 degrees are common on Elysium Mons. van der Kolk D. A. Tribbett K. L. Grosfils E. B. Sakimoto S. E. H. Mendelson C. V. Bleacher J. E. Orcus Patera, Mars: Impact Crater or Volcanic Caldera? [#1085] A re-evaluation of volcanic versus impact origins for Orcus Patera, Mars using new Mars Global Surveyor images and topography.

Hiesinger H. Head J. W. III Morphologic and Topographic Characterization of Syrtis Major, Mars with MOIA Data [#1868] We make use of high-resolution Mars Orbiter Laser Altimeter (MOLA) and MGS data in order to characterize the topography and morphology of the Syrtis Major volcanic complex and to investigate its origin and geologic evolution.

Farrand W. H. Gaddis L. R. Blundell S. Possible Hydrovolcanic Landforms Observed in MOC NA Imagery: A Preliminary Survey [#1664] In a preliminary survey of MOC NA imagery, a number of features resembling table mountains, tuff rings, and maar craters have been identified. Their locations and geologic significance will be discussed.

Ghatan G. J. Head J. W. III Candidate Subglacial Volcanoes in the South Polar Region of Mars [#1039] MOLA data support the classification of several features in the south polar region of Mars as volcanoes, and suggest a possible sub-glacial origin for these volcanoes.

38 ______32nd LPSC Program Grosfils E. B. Sakimoto S. E. H. Topographic Constraints on Magma Reservoir Volume and Depth for Small Near-Polar Volcanoes in the Northern Plains of Mars [#1111] Shallow, edifice-centered depressions may form when subsurface magma melts ground ice. Here, assuming variable porosities, we use MOLA data and thermal calculations to explore the minimum sill volume, thickness and depth required to produce the observed depressions.

Wong M.P. Sakimoto S. E. H. Garvin J. B. MOIA Topography ofSmall Volcanoes in Tempe Terra and Ceraunius Fossae, Mars: Implications for Eruptive Styles [#1563] We use MOLA data to measure small volcanoes in the Tempe Terra and Ceraunius Fossae regions of Mars. We find that previous geometry estimates based on imagery alone are inaccurate, but MOLA data support image-based interpretations of eruptive style.

Therkelsen J.P. Santiago S. S. Grosfils E. B. Sakimoto S. E. H. Mendelson C. V. Bleacher J. Eruption Constraints fora Young Channelized Lava Flow, Marte Vallis, Mars [#1112] This study constrains flow rates for a specific channelized lava flow in Marte Vallis, Mars. We measured slope- gradient, channel width, and channel depth. Our results are similar to other recent studies which suggests similarities to long, terrestrial basaltic flow.

Riedel S. J. Sakimoto S. E. H. Bradley B. A. DeWet A. Lava Tube Flow Models at Alba Patera, Mars: Topographic Constraints on Eruption Rates [#1954] Alba Patera has some of the longest lava tubes over some of the shallowest slopes on Mars. We use MOLA topography to model eruption rates for several Alba Patera lava tubes and compare them within Alba and with flows from other martian volcanic regions.

Meyer B. R. Gregg T. K. P. Inferring Lava Flow-Field Emplacement Using MOIA: Topography ofTyrrhena Patera's Flow Field [#1849] Using MOLA data to obtain accurate measurements of lava flow lobes within the Tyrrhena Patera flow field, we are able to constrain eruption and emplacement parameters.

Peitersen M. N. Foote M. Humphries R. Macinnis C. Mazie I. Trump D. Zimbelman J. R. Geomorphometric Analysis of an Ascraeus Mons Lava Flow: Implications for MGS Image Interpretation [#1472] We present here the results of an undergraduate project, to study the morphology of an Ascraeus Mons lava flow. 44 widths and 11 thicknesses (from shadow measurements) were measured off a MOC image. Geomorphometric analyses and Newtonian flow modeling were then applied.

Warner N.H. Gregg T. K. P. BulmerM. H. Textured Lava Flows on Earth, Mars, and Venus [#1693] Textured lava flows at Sabancaya volcano, Peru reveal morphologies similar to textured lava flows on Mars and Venus. Analysis of the flows at Sabancaya may provide an understanding of the rheological properties of the extraterrestrial flows.

Lanz J. K. Jaumann R. Possible Volcanic Constructs in Aram Chaos Revealed by MOC and Their Impact on Outflow Channel Genesis [#1574] MOC-Images of Aram Chaos show features resembling volcanic constructs or magmatic intrusions, hinting to the possibility that volcanic activity in the chaotic terrains themself has played a key role in triggering the events that formed the Chryse outflow channels.

Head J. W. III Kreslavsky M.A. Plains in Eastern Elysium Planitia, Mars: Topographic Evidence for Aqueous Channels and Lava Flows [#1002] The extremely flat and smooth Amazonian-age plains in eastern Elysium Planitia consist of an older unit (dendritic system of channels) and a younger unit (lava flows filling an outflow channel).

32nd LPSC Program------39 Head J. W. III Kreslavsky M.A. PrattS. Fuller E. R. Amazonis Planitia: Detection of Pre-Aureole Olympus Mons Flows and the Origin of the Smoothest Plains on Mars [#1089] Analysis of Amazonis Planitia shows subdivisions in very smooth terrain and reveals evidence for Early Olympus Mons flows and fluvial and lava deposits.

Mars Data Calibration and Archiving

Kirk R. L. BeckerT. L. Eliason E. M. Anderson J. Soderblom L. A Geometric Calibration of the Mars Orbiter Cameras and Coalignment with the Mars Orbiter lAser Altimeter [#1863] We present geometric distortion polynomials for the MOC W A red and blue cameras based on preflight data, and alignment parameters of the 3 MOC cameras and MOLA based on comparison of flight data taken simultaneously. All are good to <100m on ground.

Kim J. R. Muller J-P. Morley J. G. Mitchell K. L. Automated Registration ofMDIM with MOIA Tracks [#2087] We have developed a method for the automatic registration ofMOLA tracks and optical images by means of a crater detection algorithm and a specialised matching function for the photogrammetric DEM creation with MOLA reference using stereo photogrammetric methods.

Eliason E. M. Anderson J. A Barrett J. M. Becker K. J. BeckerT. L. Cook D. A Soderblom L. A Sucharski T. L. Thompson K. T. ISIS Image Processing Capabilities for MGS!MOC Imaging Data [#2081] The ISIS system provides image processing capabilities for the Mars Orbiting Camera (MOC) imaging. Software tools exist to read the mission-produced MGS/MOC data products and produce radiometrically and geometrically rectified images suitable for scientific analysis.

Hare T. M. Tanaka K. L. PIGWAD- Successfully Evolving with a Few Growing Pains [#1725] PIGWAD or "Planetary Interactive GIS-on-the-Web Analyzable Database," currently provi_des online GIS database and analysis support for the research and academic planetary science communities.

Slavney S. Arvidson R. E. Guinness E. A Springer R. J. Status of Mars Global Surveyor Science Data Archives [#1694] By the end of its primary mission, 1131101, MGS generated 900+ volumes of raw and derived science data. MGS continues to generate data throughout the extended mission, ending 4/22/02. Data are released regularly to the PDS and are available online.

Mars Mapping

Rosiek M. R. Kirk R. Howington-Kraus E. Mars Orbiter lArge-Scale Topographic Maps [#1950] Large-scale topographic maps of Mars from Viking Orbiter imagery. Horizontal control from the revised MDIM and vertical control from MOLA Photogrammetry and photoclinometry to derive digital elevation models.

Kirk R. L. Archinal B. A E. M. Davies M. E. Colvin T. R. Duxbury T. C. Global Digital Image Mosaics of Mars: Assessment of Geodetic Accuracy [#1856] A revised global image mosaic of Mars (MDIM 2.0) was recently completed by USGS. Comparison with high- resolution gridded MOLA DTMs will allow us to quantify its geodetic errors; tying the next MDIM to the MOLA data will help eliminate those errors.

40 ______32nd LPSC Program Baratoux D. B. Delacourt C. D. Allemand P. A. New Local DEM Derived from Combination of High-Resolution Viking Images and the High-Precision MOLA Data Set [#1305] Topographic mapping is essential for understanding geologic processes. DEM of Mars can be computed from interpolated MOLA or stereophotogrammetric analysis of Viking images. We present a method to registrate and combine these two data sets.

Tanaka K. L Skinner J. A. So What Did Mars Pathfinder Land On? Results from MOLA Topography [#2189] MOLA data indicate that Tiu Vallis is the channel to cut across the Mars Pathfinder landing site. However, the source region of the rocks there is still highly uncertain.

Kirk R. L Howington-Kraus E. Cook D. Hare T. M. Becker K. Mapping the Sagan Memorial Station Site: Geometric Control with Self-Calibration of the IMP Camera and Implications for Future Mars Landers [#1869] Controlling Mars Pathfinder images to <0.3 pixel error has been achieved by including camera parameters as unknowns in the control calculation. Similar "self calibration" will be needed on future landers and the necessary data should be acquired.

Kirk R. L Thompson K. T. Lee E. M. Photometry of the Martian Atmosphere: An Improved Practical Model for and Photoclinometry [#1874] Our photometric model for normalization of images in cartography has been improved by adding a correction for directional atmospheric scattering. We also apply the model to estimate systematic errors in photoclinometry for Mars.

Takagi M. Zimbelman J. R. Geomorphic Mapping and Analysis of the Eastern Medusae Fossae Region of Mars [#1579] A geomorphic map of the MC-8SE quadrangle on Mars is used to examine hypotheses of origin for the Medusae Fossae Formation, as well as to characterize the regional setting of these enigmatic materials.

Lanagan P. D. McEwen A. S. Link L S. Geomorphic Mapping of Cerberus Plains, Mars [#2077] A geomorphic map of pristine volcanic and fluvial of the Cerberus plains, Mars, is presented. Units are identified on the basis of high-resolution MOC images and low-resolution Viking basemaps.

Yoburn J. B. Yazzie R. Grosfils E. B. Sakimoto S. E. H. Mendelson C. V. Bleacher J. E. Age Relationships and Chronology for the Orcus Patera Region of Mars [#1077] Recent water and lava flows on the surface of Mars have renewed interest in radiometrically dating rock samples from specific locations on the planet. Here we examine a region and attempt to assign relative and absolute ages to its features.

Hynek B. M. Arvidson R. E. Phillips R. J. Seelos F. P. Preliminary Stratigraphy of Terra Meridiani, Mars [#1179] Stratigraphic analyses reveal that the Terra Meridiani hematite locale is not an isolated deposit; rather it is situated in the middle of a complex layered sequence of bedforms that extend hundreds of kilometers and bury Noachian cratered terrain.

Hiesinger H. Head J. W. III Geology of the Argyre Basin, Mars: New Insights from MOLA and MOC [#1799] Several models have been proposed for the geologic evolution of the Argyre basin, Mars. We use high-resolution MOLA and MOC data in order to test the plausibility of these hypotheses.

KolbE. J. Tanaka K. L. South Polar Region of Mars: Preliminary 1:3,000,000-Scale Mapping Results [#2082] We present several preliminary results of our south of lat 65°S 1:3,000,000-scale mapping of Mars.

32nd LPSC Program------41 Outer Body Experiences

Brooks S. M. Esposito L. W. Throop H. B. Showalter M. R. Photometric Analysis of Jupiter's Main Ring with Galileo SSI and NIMS Imaging [#2146] We present the findings of our photometric analysis of both Galileo SSI and NIMS data of the Jovian main ring. Our results are discussed in the context of previous work. In particular, we reconcile the seemingly disparate results from earlier research.

Bhattacharyya A. Chakrabarti S. K. Theoretical Study of Constraints on the C Ring Parameters of at the Titan -1:0 Resonance [#1046] We study the particle dynamics inside Saturn's ring by analytical and numerical method. We find a new shear due to variation of radial velocity along the vertical direction and show that this causes a rapid damping of the bending wave.

Stooke P. J. Voyager Images Revisited: New Views of the Satellites of Saturn and [#1074] New processing methods applied to Voyager images reveal new features on outer planet satellites, including features on Ariel illuminated by and many features in areas left blank on USGS maps. New maps of demonstrate these improvements.

Nazzario R. Hyde T. W. Further Investigations of Dust Grain Orbital Behavior Around [#1222] Dust grain orbital behavior around Neptune is investigated using a fifth order -Jutta method.

Moses J. I. Ablation on the Outer Planets [#1161] We have calculated the ablation rate of interplanetary dust particles in the of Jupiter, Saturn, Uranus, and Neptune. Implications for neutral and ionospheric chemistry and aerosol formation will be discussed.

Garry J. R. C. Towner M. C. Sonar Behaviour in Non-Terrestrial Ocean Exploration [#1726] A goal for a future Europan payload is to determine the extent of the postulated , aspects of acoustic remote sensing are discussed with a view to operating a sonar in such a subsurface ocean.

Goldsby D. L. Kohlstedt D. L. Pappalardo R. A Composite Flow Law for Water lee for Use in Modelling of Glaciers, Polar Caps, and Icy Planetary Interiors [#2067] The dynamical properties of glaciers, polar caps, and icy planetary interiors are controlled in large part by the grain- scale deformation of ice. A new composite flow law reveals the existence of four distinct creep regimes for ice.

McKinnon W. B. Schenk P.M. Moore J. M. Topographic and Morphologic Evidence for Flooding of Ganymede's Resurfaced Terrains by Low-Viscosity Water- Ice Lavas [#2179] Topographic mapping in at least 3 distinct regions of Ganymede reveals that smooth terrains are flat and are topographically depressed. This and embayment relationships are consistent with volcanic resurfacing.

Thomas C. A Morphological Examination of Lugalmeslam Crater, Ganymede [#1412] Lugalmeslam is a crater on Ganymede with an unusual elliptical rim where it overlaps the bright terrain ofMashu Sulcus. An analysis of the crater's morphology is presented which provides new insights into the processes that have affected its shape.

42 ______32nd LPSC Program Spaun N. A. Head J. W. III Pappalardo R. T. Galileo SSI Team Scalloped Depressions on Ganymede from Galileo (G28) Very High Resolution Imaging [#1448] We have analyzed new Galileo images of scalloped depressions, described as caldera-like features, on Ganymede to test for evidence of cryovolcanism.

Collins G. C. Farrar K. S. A GIS Crater Database for Comparison of Crater Density on Ganymede Terrain Types and Features [#1499] We present global mapping of craters on Ganymede in an effort to have a database to generate the crater density of stratigraphic units within the grooved terrain. We also discuss GIS techniques for .

Giese B. Wagner R. Neukum G. Pappalardo R. Head J. W. III Galileo SSI Team The Topography of Ganymede's Arbela Sulcus [#1743] Stereo images acquired during Galileo's 28th orbit are used to derive the topography in Ganymede's Arbela Sulcus. Implications for the formation of Arbela are given.

Head J. W. III Pappalardo R. T. Collins G. C. Spaun N. A. Nixon B. Wagner R. Giese B. Neukum G. Galileo SSI Team Ganymede: Very High Resolution Data from G28 Reveal New Perspectives on Processes and History [#1980] Recent G28 very high resolution image data provides new insight into five major problem areas and shows evidence for strike-slip faulting and processes perhaps like Europa band formation.

BeckerT. Archinal B. Colvin T. Davies M. Gitlin A. Kirk R. L. Weller L. Final Digital Global Maps of Ganymede, Europa, and Callisto [#2009] Completion of the digital global cartographic maps of Ganymede, Europa, and Callisto. The maps utilize image data acquired from Galileo SSI and Voyager 1 and 2 missions.

Harcke L. J. Zebker H. A. Jurgens R. F. Slade M.A. Butler B. J. Harmon J. K. Radar Observations of the Icy Galilean Satellites During 2000 Opposition [#1369] We report results of radar observation campaigns of Europa, Ganymede, and Callisto carried out during the November/December 2000 Jovian opposition using the Arecibo 12.6 em, Goldstone 3.5 em, and GoldstoneNLA 3.5 em bistatic radars.

Venus Geology and Geophysics

Kortz B. E. Head J. W. III Comparisons of Volcanic Fields on Venus, Earth, and Mars [#1422] Analysis of volcanic fields on Venus, Earth, and Mars show that venusian shields are most similar to terrestrial low shields. Martian shields are also similar but differ in morphology due to atmospheric and gravity differences.

Slade M. A. Simons M. Pritchard M. E. Jurgens R. F. Arecibo to Goldstone Radar Interferometric Topography of Selected Regions of Venus [#1511] New high resolution digital elevation models (DEMs) ofthe equatorial region of Venus will be merged with Magellan imagery in order to investigate the relationship between the emplacement of the plains and the tesserae, and rifting in Phoebe Regia.

Kreslavsky M.A. Raitala J. N. V. Volcanic Plains on Venus: Search for Correlation Between Dielectric Permittivity and Stratigraphic Position [#1171] Survey of microwave emissivity contrasts associated with volcanic units boundaries in Venus plains was carried out. Units with locally higher dielectric permittivity was found to be locally younger. This can be due to surface alteration or mantling.

32nd LPSC Program------43 Byrnes J. M. Crown D. A. Emplacement of Venusian Lava Flow Fields [#1038] This study constrains emplacement processes within lava flow fields on Venus through analysis of flow lobe morphologies and radar backscatter characteristics at Mylitta Fluctus, Zipaltonal Fluctus, and within Guinevere Planitia.

Stofan E. R. Guest J. E. Brian A. W. Plains Resurfacing on Venus: Examples from Geographically Diverse Quadrangles [#1313] We describe plains resurfacing styles in the eight quadrangles we have been mapping under the Venus Geologic Mapping Program.

Ivanov M. A. Head J. W. III Large Tesserae Flooding Experiment: Comparison with Small Tesserae [#1055] Flooding experiments of existing tessera on Venus produce similarities to tessera with patchy distribution suggesting that tessera underlines many areas of regional plains.

Ivanov M. A. Head J. W. III Geologic Mapping in V-6I Quadrangle, Venus: Preliminary Results [#1049] Preliminary mapping of the V -61 Quadrangle, Venus, shows that the region is transitional between Lavinia Planitia and Lada Terra and is dominated by Quetzalpetlatl Corona.

Young D. A. Hansen V. L. Rusalka Complete: Geology of a Venusian Planitia [#2131] We will present a detailed map ofRusalka Planitia, Venus, compiled from V25 and V37. A regional geological history will show the resurfacing and tectonic processes that have shaped the basin.

Bridges N. T. Stratigraphy and Observations ofNepthys Mons Quadrangle (V54), Venus [#1376] Initial mapping has begun in Venus Quadrangle V54 (300-330°E, 25-50°S). Two major findings are: 1) Shield plains are a young unit, and 2) The stratigraphic relationships of polygonal plains are inconsistent with an origin induced by global temperature changes.

Lopez I. Geology of the Helen Planitia Quadrangle (V52), Venus: Initial Results [#1285] An initial study on the geology ofthe Helen Planitia Quadrangle (V52) has been carry out. This work describes the different volcanic and tectonic features present in the area, paying special attention to large tectovolcanic structures as coronae.

Bleamaster L. F. III Hansen V. L. Geology of the Ovda Regia Quadrangle (V35), Venus [#2113] The complex geology of the V35 quadrangle allows the investigation of crustal plateau evolution, chasmata formation, coronae development, and the interactions that occur between them.

Bleamaster L. F. III Hansen V. L. The Kuanja/Vir-Ava Chasmata: A Coherent Intrusive Complex on Venus [#1316] A "coherent intrusive complex" model accounts for the presence of pit chains, troughs, normal faults, calderas, central volcanoes, lava channels, and lava flows at the Kuanja/Vir-Ava Chasmata.

Jurdy D. M. Stoddard P.R. Orientation of Coronae and Relation to Chasmata on Venus [#1811] By specifically analyzing the orientation, eccentricity, and tilt of coronae, we seek an independent determination of deformation and uplift history relative to the surrounding regions, as well as the inter-relationship of coronae and chasmata.

44 ______32nd LPSC Program Harris B. A Ernst R. E. Evidence for Radiating Dyke Swarms Fed from Multiple Magma Chambers Located Within the Central Regions ofVolcanic/Magmatic Centres: Two Examples from Southern Sedna Planitia/Northern Western Eistla Regia, Venus [#1836] Superimposed radiating graben systems (interpreted to be underlain by dyke swarms) are used to locate multiple magma chambers within volcanic/magmatic centres.

Ernst R. E. Desnoyers D. W. Head J. W. Ill Grosfils E. B. Characterization of Radiating, Linear and Circumferential Graben Systems in Northern Guinevere Planitia/ Beta Regio Region (264-312°E, 24-60°N), Venus [#1387] Detailed mapping of 1000s of individual narrow graben in an area (264-312 °E 24-60°N) of Venus reveal 29 radiating system (15 having radii greater than 300 km and 7 having radii greater than 1000 km), and 13 linear systems > 1000 km long.

Ghail R. C. Continental-like Tectonics Revealed by the Structural History of Thetis Regia, Venus [#1758] Structural mapping of Thetis Regio reveals discrete tectonic terrains, implying that it formed not by a single process of upwelling or downwelling but by multiple continental-like tectonic events, involving considerable horizontal transport.

Ghail R. C. The Complex Case of Be ruth Corona [#1276] Detailed stratigraphic mapping of Beruth Corona reveals the complex history of rifting and intrusion that formed this multiple corona in Parga Chasma. Modifications to the diapiric theory are required to explain the range of observed features.

Basilevsky A. T. Raitala J. T. Morphology ofSelected Novae, Venus [#1058] Analysis of five typical novae show if they are one- or multi-stage structures, whether they have associated volcanism, at what stage of nova evolution it occurred, and during which periods of the geologic history of Venus novae formed.

Aittola M. Kostama V -P. Model for Nova Formation Within Corona Evolution [#1280] Our model predicts that the established variations in morphology, topography and the age relations of corona annulus and nova radial features depend on the stage of corona evolution during the nova forrning reactivation period or event.

Krassilnikov A. S. Novae on Venus. Distribution, Classification and Evolution [#1533] Basing on analysis of topography and geology of 64 novae we suggest their classification and sequence of evolution. Our results are in agreement with published numerical, geological and tectonophysical models of the nova and corona formation.

Krassilnikov A. S. Formation of Novae and Coronae on Venus. Tectonophysical Modeling Using Gravity Models [#1531] Novae and coronae formation was simulated using caoutchouc as a model of lower ductile part of lithosphere and dry flour as a model of upper brittle part of it. Distribution and character of the deformational structures is described.

Kostama V-P. Aittola M. The Global Distribution and Altimetry of Venusian Arachnoids, Novae and Coronae [#1185] The study of the altimetry of coronae, arachnoids and novae shows that arachnoids and novae both have correlations to the altimetric distribution of coronae, while being in contrast to each others. The global distributions are distinct and different.

32nd LPSC Program------45 Stofan E. R. Baloga S. M. Glaze L. S. Smrekar S. E. An Updated Database of Coronae on Venus [#1417] We present an updated database of coronae on Venus, increasing the number of features from 336 to 523.

Peterson K. Kiefer W. S. The Deep Structure of Coronae on Venus: The Beta-Atla-Themis Region [#1430] Gravity modeling indicates the presence of hot diapirs under some large coronae in the BAT region of Venus. Other coronae are located over regions of average mantle temperature, indicating a significant period of thermal cooling since those coronae formed.

Smrekar S. E. Stofan E. R. Implications ofa Gravity Survey for the Formation Mechanisms and Stage of Evolution of Topographic (Stealth) Coronae [#1971] Gravity/topography admittance spectra for 34 topographic (stealth) coronae show a range of bottom and top loading signatures. Here we interpret these loading signatures in the context of possible models of their formation.

Comstock R. L. Smrekar S. E. Anderson F. S. Topographic Corona Gravity Survey Results [#2006] We present estimates for elastic and crustal thickness obtained from a gravity survey of Venusian topographic coronae, and characterize advantages and disadvantages for generating spectral admittance.

Nunes D. C. Phillips R. J. Finite Amplitude Relaxation of Crustal Plateaus on Venus [#1926] Viscous relaxation of initially compensated crustal plateaus on Venus has finite amplitude, reducing initial topography by less than 25%, and is too limited to support the idea of a genetic link between crustal plateaus and arcuate tessera inliers.

Nomura T. Abe Y. The Interior of Venus: Inferred from Long Wavelength Geoid and Topography Data [#1696] We constrain the flow pattern and upper-lower viscosity contrast in Venusian mantle from the observed long wavelength admittance ( geoid height I topographic height) data using a dynamic support model.

Anderson F. S. Smrekar S. E. Global Admittance Estimates of Elastic and Crustal Thickness of Venus: Preliminary Results from Top and Bottom Loading Models [#2182] Initial elastic and crustal thickness estimates (Te and Zc) for a global set of local admittance inversions with a one degree spacing for Venus provide a global map for interpreting subsurface structure.

Lunar Mare Basalts: Observations and Analyses

Arai T. Takeda H. Melting Experiment on Ancient Mare Basalt Asuka 881757 [#1314] Asuka (A) 881757 is an unbrecciated, coarse-grained mare basalt that crystallized at 3.94 Ga, with very low Ti02. Melting experiments on A881757 were performed to understand the cooling/crystallization history of this new type of basalt, focusing on spinel.

Beck A. R. Hess P. C. The Saturation Surface of High Ti Mare Basalts [#1939] We have calculated the ilmenite saturation surface for high Ti mare basaltic glasses and applied it to basalt petrogenesis.

Elkins Tanton L. T. Van Orman J. A. Grove T. L. Is the Sinking High-Ti Cumulate Hypothesis Sunk? [#1946] The physical and petrologic aspects of five high-Ti cumulate overturn models are examined, and only two are found to be possible. Wholesale sinking oflate-stage high-Ti lunar cumulates is unlikely.

46 ______32nd LPSC Program Shearer C. K. Borg L. Ryder G. Papike J. J. Nyquist L. Deciphering Ages of Impacted Basalts Using a Crystal Chemical-Ion Microprobe Approach. An Example Using the Apollo I7 Group D Basalt [#1851] We report on the major and trace element characteristics of a "glass" component in a mare basalt (79001) and speculate on its role in defining the isotopic behavior of this sample.

Hagerty J. J. Shearer C. K. Papike J. J. Trace Element Variability of the High-Al Basalts: A Result of Igneous Processes or Sample Size? [#1235] Three fragments of aluminous basalt were analyzed via SIMS. Each fragment exhibited a range of bulk incompatible element concentrations. The data from these fragments show an interesting dichotomy in the incompatible- compatible element behavior.

Antonenko I. Prinos J. Stratigraphy of the Crater Area: Investigations Using Statistical Crater Modeling [#1210] Craters from previous work in the Schickard area are compared to a model crater population, and are found to be consistent with a stratigraphic model having two cryptomare layers. Statistically, very few craters are expected to tap deep mare layers.

Pieters C. M. Head J. W. III Extent of Basaltic Volcanism in South Pole-Aitken Basin [#1821] In addition to basaltic mare identified within SPA, several older basaltic deposits ( cryptomare) are recognized. SPA basalts occur as localized deposits and there is no evidence for extensive volcanism similar to that in basins on the nearside.

Petro N. E. Gaddis L. R. Staid M. I. Analysis of the Pyroclastic Deposits Using UWIS Data [#1953] Clementine data are used to examine the compositions of pyroclastic deposits in the lunar farside crater Oppenheimer. The compositions of these deposits are compared to those of other pyroclastic deposits in SPA basin and in and J. Herschel craters.

Hawke B. R. Robinson M.S. Craddock R. A. Blewett D. T. Smith G. A. Geochemical Studies of the Moscoviense Basin Region [#2094] Clementine UVVIS images, iron maps, maps, and maturity images were used to investigate the composition and origin of surface units in the Moscoviense basin region.

Hiesinger H. Head J. W. III WolfU. Neukum G. New Age Determinations of Lunar Mare Basalts in , , , and Other Nearside Mare [#1815] We present crater size-frequency distribution measurements for spectrally homogeneous basalt units in Mare Cognitum, Mare Nubium, Oceanus Procellarum, and other nearside maria. We combine these data with volume estimates to study the flux of basalts.

Boroughs L. L. Spudis P. D. The Stratigraphy of Lava Flows in Northern Oceanus Procellarum, Moon [#1192] Using Clementine image data, we have mapped the stratigraphy of lava flows in Northern Oceanus Procellarum. We find a variety of flows with varying compositions and ages, attesting to protracted volcanic eruption history.

Jolliff B. L. Gillis J. J. Lawrence D. J. Maurice S. Thorium Content of Mare Basalts of the Western Procellarum Region [#2143] Maps ofFeO, Ti02, and Th for a region of Western Procellarum are shown at half-degree resolution. Using compositional profiles and geological relationships, we show some of the basalts to be enriched in Th, similar to high-K basalts.

32nd LPSC Program------47 Heather D. J. Dunkin S. K. Wilson L. Volcanism on the Plateau [#1542] The Marius Hills region has been studied using Clementine data. A wide range of eruption styles have shaped the plateau. Pyroclastics appear on many scales as both localized glassy deposits and well developed cones. Modelling work is ongoing.

Malum K. M. Colson R. O. Sawarynski M. Mapping Activity Variations for Ru20 3 in Lunar Volcanic Green Glass Analogs Using Differential Pulse Voltammetry [#1672] Using differential pulse voltammetry, we are mapping variations in activities for NiO and Ru20 3 as a function of compositional variation for compositions centered around an Apollo 15 green glass analog.

Lunar Surface Processes: Implants, Facelifts, and Extractions

Assonov S. S. Marty B. Shukolyukov Yu. A. Semenova A. S. Nitrogen and Argon Isotopes in Single Particles from Luna-24 Regolith: Search for the Modem Component [#1798] Luna-24 and agglutinate particles were analysed for N and Ar isotopes. Majority of particles has negative 815N values as well as low 40 ArP6 Ar. Trend seen for particles with low 40 ArP6 Ar is suggestive modem solar wind to be lighter than sought before.

Jull A. J. T. McHargue L. R. Klandrud S. E. Cosmic-Ray-produced 14C and 10Be in Lunar Rock 74275 [#1459] The depth dependence of 14C and 1 ~e produced by the action of solar and galactic cosmic rays on lunar rock 74275 was studied. The results are compared to those of other lunar rocks where many radionuclides have been studied, such as 68815.

Sickafoose A. A. Colwell J. E. Horanyi M. S. Dust Particle Charging near Surfaces in Space [#1320] Dust dynamics, as observed on the lunar surface, are thought to be due to the interaction between charged dust and a photoelectron sheath above the surface. We perform experiments on the charging and dynamics of dust near a surface having a sheath.

Mall U. Borisov N. Electric Potential Distribution on the Nightside of the Moon [#1538] The electric potential distribution close to the lunar surface on the ide of the Moon is investigated in an analytic form.

Sisterson J. M. Jones D. T. L. Binns P. J. Langen K. Schroeder I. Buthelezi Z. Latti E. Brooks F. D. Buftler A. Allie M.S. Herbert M. S. Nchodu M. R. Makupula S. Ullmann J. Reedy R. C. 22 Production of Na and Other Radionuclides by Neutrons in Al, Si02, Si, Ti, Fe and Ni Targets: Implications for Cosmic Ray Studies [#1302] Cross section measurements for neutron-induced reactions are summarized. Measured cross sections for 22Na produced by neutrons in Aland Si are used to calculate the production rate for 22Na in lunar rock 12002 by galactic cosmic ray particles.

Zeigler R. A. Jolliff B. L. Korotev R. L. Kremser D. T. Haskin L.A. Petrology and Geochemistry of Lunar Regolith Particle 65903,16-7: Evidence for Extreme Reduction and Oxidation [#1242] Apollo 16 particle 65903,16-7 is a magnesian, alkali-rich impact melt breccia. Low Fe/Mn and high phosphide/phosphate ratios are evidence of severe reduction during impact-melt cooling. Presence of carbonate and FeOOH is evidence for later oxidation.

Withers P. Meteor Storm Evidence Against the Recent Formation of Lunar Crater [#1007] Was the formation of a 20-km-diameter lunar crater observed in June, 1178 AD?

48 ______32nd LPSC Program Gibson R. L. Reimold W. U. Ashley A. J. Koeberl C. Granulitic Melt Breccias in the Vredefort Impact Structure, South Africa-A Terrestrial Analog for Lunar [#1013] Feldspathic granulitic breccia veins in Archean gneiss of the core of the Vredefort Dome are thought to be products of impact-induced melting. These breccia veins have some features in common with lunar granulites, the origin of which is still enigmatic.

Taylor L. A. Nazarov M. A. Cohen B. A. Warren P. H. Barsukova L. D. Clayton R. N. Mayeda T. K. Bulk Chemistry and Oxygen Isotopic Compositions of Lunar Meteorites Dhofar 025 and Dhofar 026 [#1985] The major- and trace-element composition of highlands meteorites Dh25 and Dh26 show that both are dominated by a FAN component. Incompatible element depletion and low Ti abundances suggest a farside origin. 0-isotopes are typical for lunar meteorites.

Cahill J. T. Cohen B. A. Taylor L.A. Nazarov M. A. Mineralogy and Petrology of "New" Lunar Meteorite Dhofar 025 [#1840] Dh25 is an anorthositic regolith breccia. The mineral chemistry of most rock and melt clasts have compositions intermediate between FAN and HMS fields, indicative of a non-Apollo, FAN-rich locale, possibly the lunar farside.

Cohen B. A. Taylor L. A. Nazarov M. Impact Melt Compositions in Lunar Meteorite Dhofar 025 [#1409] The chemistry of crystalline impact melt clasts within lunar highlands meteorite Dh25 indicate that they are derived from KREEP-poor, basalt-free areas, making them good targets for age dating to further constrain the bombardment history of the Moon.

Shukolyukov Yu. A. Nazarov M.A. Piitsch M. Schultz L. Noble Gases in Three Meteorites from Oman [#1502] Concentration and isotopic composition have been measured in three new lunar meteorites: Dhofar 025, Dhofar 026, and Dhofar 081. These meteorites are not paired.

Lunar Jambalaya: Petrology, Geochemistry, and Geophysics

Neal C. R. Ely J. C. Jain J. C. The Siderophile Element Budget of the Moon: A Reevaluation, Part 2 [#1662] New PGE data are presented that show distinctions between the high- and low-Ti mare basalts.

Domeneghetti M. C. McCallum I. S. Schwartz J. M. Camara F. Zema M. McCammon C. Ganguly J. Complex Cooling Histories of Lunar 76535 and Stillwater Orthoyroxenite SC-936 [#1151] Fe-Mg site occupancy determinations of orthopyroxene from troctolite 76535 yield closure temperatures of ordering of 500-550°C and cooling rates of 1-10°C per year corresponding to shallow burial. 76535 was excavated from deep lunar crust before it had cooled to -550°C.

Aoshima C. Namiki N. Structures Beneath Lunar Basins: Estimates of Moho and Elastic Thickness from Local Analysis of Gravity and Topography£#1561] We attempt localized spectral analysis of the Moon and then apply possible compensation mechanisms to explain the observed admittance. The Moho depth over the near side is estimated to be constantly 50-60 km.

Stevenson D. J. Origin and Implications of the Degree Two Lunar Gravity Field [#1175] There are major problems with the long-favored idea that the lunar degree two gravity field is a fossil tidal and rotational bulge. Alternatives or additions to this include primordial heterogeneity and variation in elastic properties of the lithosphere.

32nd LPSC Program------49 Khan A. Mosegaard K. The Deep Lunar Velocity Structure Inferedfrom Lunar Free Oscillations [#1529] We have inverted a number of fundamental spheroidal oscillations to infer the deep lunar velocity structure. The results seem to corroborate the findings from our arrival time inversion.

Williams J. G. Boggs D. H. RatcliffJ. T. Yoder C. F. Dickey J. 0. Influence ofa Fluid Lunar Core on the Moon's Orientation [#2028] Oblateness of and dissipation at the lunar liquid-core/solid-mantle boundary affects the of core and mantle. Analysis of Lunar Laser ranges gives a weak detection of oblateness and a strong determination of dissipation.

Origins of Planetary Systems

KenKnight C. E. The Radial Mass Distribution Due to Heating Events [#1724] Heating events in the solar nebula were localized in 3D, on the order of the scale height for the gas. This idea, combined with a changing of the "surface" of the nebula in response to the event, predicts the observed projected surface density.

Kress M. E. Desch S. J. Shock Chemistry in the Inner Solar Nebula: Implications for Meteorites and Protoplanetary Disks [#2096] We calculate the gas-phase chemical abundances behind chondrule-forming (7-8 km/sec) shocks. We discuss the consequences on the chemistry of the terrestrial-planet-forming regions ofprotoplanetary disks.

Mastrapa R. M. E. Brown R. H. Modeling the Effects of Ion Radiation on Crystalline Water Ice [#1381] We will present model results from the collision cascade program, MARLOWE. We will attempt to constrain timescales and depth of processing of icy surfaces by ion radiation, specifically the conversion of crystalline water ice to amorphous.

Leya I. Wieler R. Halliday A. N. The Influence of Cosmic-Ray Production on Extinct Nuclide Systems. New Results from Improved Model Calculations [#1521] We present new results for the cosmogenic contributions to extinct nuclide systems.

Qiao K. Hyde T. W. Simulating Dust Lattice Waves in Plasma Crystals Using the Box_Tree Code [#1205] DAW and DLW modes within a dust crystal are examined using the Box_Tree code.

Lindsay B. D. Hyde T. W. Dynamics of Interplanetary Planetesimal Rings [#1008] Among the problems yet to be solved by current theories of solar system formation is the origin of the Jupiter-family . Several possibilities are examined using a fifth-order Runge-Kutta algorithm.

Manuel O. Bolon C. Zhong M. Jangam P. The 's Origin, Composition and Source of Energy [#1041] The Sun and its planetary system formed out of the debris of a supernova. The Sun formed on the collapsed SN core, a neutron star, which generates SW-H and solar luminosity by emission of neutrons, n-capture or decay, H upward migration and fusion, and escape of SW-H.

Modeling Impact Crater Processes

Shuvalov V. V. Artemieva N. A. Numerical Modeling of Impact Cratering at Shallow Sea [#1122] In this paper impacts into shallow water are studied by detailed numerical simulations.

50 ______32nd LPSC Program Anderson J. L. B. Schultz P. H. Reineck J. T. Oblique Impact Ejecta Flow Fields: An Application of Maxwell's Z Model [#1352] Oblique impact flow fields show an evolution from asymmetric to symmetric ejecta flow. This evolution can be put into the simple analytical description of the evolving flow field origin using the Maxwell Z Model.

Artemieva N. A. Ivanov B. A. Numerical Simulation of Oblique Impacts: Impact Melt and Transient Cavity Size [#1321] We present 3D hydrocode numerical modeling for oblique impacts (i) to estimate the melt production and (ii) to trace the evolution of the transient cavity shape till the crater collapse.

Ivanov B. A. Arternieva N. A. Transient Cavity Scaling for Oblique Impacts [#1327] First results of our numerical investigation of scaling laws for the case of oblique high velocity impacts are presented.

Ivanov B. A. Turtle E. P. Modeling Impact Crater Collapse: Acoustic Fluidization Implemented into a Hydrocode [#1284] We discuss how to scale the intensity and the decay time of oscillations in the acoustic fluidization model to produce realistic impact crater morphologies, from central peak craters (e.g., Bosumtwi) to multiple-ring craters (e.g., Chicxulub) with a numerical model.

Collins G. S. Hydrocode Simulations of Collapse [#1752] We use hydrocode modelling to investigate complex crater collapse. We have modelled the collapse of20 craters with a range of crater diameters from 1-1000 km. We compare our results (qualitatively and quantitatively) with the morphology of lunar craters.

MeloshH. J. Gravitational Modification of Ejecta Curtain Expansion [#2135] The Mission to P!Tempel 1 will image the expansion of an artificial impact crater. Images of the edge of the expanding ejecta curtain appear capable of determining the mass and density of the comet.

YamamotoS. Velocity Distribution of Powdery Ejecta in Oblique Impacts [#1180] I have performed impact experiments onto soda-lime glass powders to investigate velocity distribuiton of powdery ejecta in oblique impacts. Our results suggest that the velocity distribution of powdery ejecta depends strongly on impact angle.

McKinnon W. B. Fisher J. L. Passer A. L. Does Crustal Thickness Assist the Transition from Central-Peak to Peak-Ring Crater? [#1772] The hypothesis that crustal thickness can affect (or even determine) the transition to the peak-ring form is examined for the Moon, Mars, and Venus. It is found wanting, but shock reflection at the Moho could affect the excavation flow in principle.

Environmental Effects of Impact Cratering

Thorsos I. E. Newsom H. E. Davies A G. Availability of Heat to Drive Hydrothermal Systems in Large Martian Impact Craters [#2011] The central uplift in large craters on Mars can provide a substantial source of heat, equivalent to heat produced by the impact melt sheet. The heat generated in large impacts could play a significant role in hydrothermal systems on Mars.

Daubar I. J. Kring D. A. Impact-induced Hydrothermal Systems: Heat Sources and Lifetimes [#1727] Lifetimes of impact-induced hydrothermal systems are investigated by modeling the thermal evolution of impact melt sheets and central uplifts for different crater sizes.

32nd LPSC Program------51 Wolbach W. S. Widicus S. Dypvik H. A Preliminary Search for Evidence of Impact-related Burning near the Mj¢lnir Impact Structure, Barents Sea [#1332] To see if combustion of biomass, impactor, or carbon-bearing target rocks occurred during the Mj!lllnir impact, we looked for soot in samples from an ejecta-bearing core drilled 30 km from the crater. Appreciable soot was observed in and above the ejecta unit.

Pierazzo E. Spitale J. N. Kring D. A. Hydrocode Modeling of the Ries Impact Event [#2106] This work presents preliminary results of a 3D hydrocode simulation of the Ries impact event. In particular, we estimate the volumes of various types of sediments that underwent melting and vaporization/degassing.

Goto K. Tajika E. Tada R. lturralde-Vinent M. A Kiyokawa S. Nakano Y. Yamamoto S. Garcia D. Oji T. Rojas R. Takayama H. Matsui T. The Penalver Formation: Deep-Sea Tsunami Deposit at K/T Boundary in Western Cuba [#1604] The Penalver Formation in western Cuba is one of the thickest KIT boundary deposit. The lower unit is local debris flow deposit whereas the upper unit is deep-sea tsunami deposit, which is affected the repetition of tsunamis.

Impact Cratering on Mars

Wallis D. W. McBride N. The Detailed Characterization of Martian Impact Craters from the 1/16 Degree MOLA Global Topography Grid [#1692] We describe a new project to obtain a global characterisation of martian impact crater morphology from the 1116 degree MOLA topography dataset. A new mathematical method applicable to both symmetric and asymmetric craters is used.

Gilmore M.S. Skinner J. A Tanaka K. L. Crater Counts ofNoachian Swfaces at MOC Resolution [#2038] Still open is the question of how accessible Noachian-aged rocks will be at the scale of the MER landing ellipse. Crater counts using MOC data preserve relative age relationships and thus potentially allow comparision one landing ellipse to another.

Neukum G. Ivanov B. A. Crater Production Function for Mars [#1757] The cratering chronology model is established which can be used as a safe basis for modeling the impact chronology of other terrestrial planets, especially Mars.

Barlow N. G. Osborne P. Searching for Isolated Crater Clusters on Mars [#1602] We are conducting a survey of the locations and sizes of isolated crater clusters on Mars to test between the two major formation theories: ( 1) impact of rubble-pile asteroids/comets, or (2) breakup of material as it passed through a thicker past atmosphere.

Mackey F. Barlow N. G. Redefining the Preservational Categories of Martian Impact Craters [#1599] We have developed a 7 -point scale to descrbe the preservational state of martian impact craters, with 0 denoting "ghost" craters and 7 referring to pristine craters. We present results from statistical analysis of craters is quadrangles MC08, 09, 10, 11, and 12.

Herrick R. R. Shanteau R. L. The Shape and Appearance of Oblique Impact Craters on Mars [#1909] Using MOLA data, we present an initial look at the variation in appearance and shape of martian craters with impact angle.

52 ______32nd LPSC Program Shuvalov V. V. Dust Ejection Induced by Small Meteoroids Impacting Martian Surface [#1126] The objective of this study is numerical modeling of meteoroid impact on the martian surface and determination of the resulting dust cloud parameters.

Martian Meteorites

Neal C. R. Taylor L.A. Ely J. C. Jain J. C. Nazarov M. A Detailed Geochemistry of New Shergottite, Dhofar 019 [#1671] Detailed geochemical data are presented for new shergottite Dhofar 019.

Shearer C. K. Taylor L. A. Nazarov M. A. Trace Element Crystal Chemistry ofMinerals in DHOFAR OI9. Implications for the Petrogenesis of Martian Magmas [#1881] We report on the major and trace element characteristics of mineral phases in DHOF AR 019 to shed additional light on martian basaltic magmatism.

Badjukov D. D. Nazarov M. A. Taylor L. A. Shock Metamorphism in the Shergottite Meteorite Dhofar 019 [#2195] Similar to all SNC meteorites, Dhofar 019 contains evidence for substantial shock metamorphism. The shock pressure and temperature have been estimated for this meteorites, using a computed Hugoniot.

Lentz R. C. F. McSween H. Y. Jr. Nazarov M.A. Taylor L.A. A Textural Consideration ofDhofar OI9 with Comparisons to Other Basaltic Shergottites [#1742] Qualitative and quantitative textural analyses of Dhofar 019 suggest a closer resemblance to Zagami than to EET 79001A or DaG 476, implying similar crystallization conditions dominated the formations of the pyroxene populations of Dhofar and Zagami.

Mikouchi T. Miyamoto M. Dhofar 019 Shergottite: Mineralogy and Petrology ofa New Member of the Basaltic martian Meteorites [#1644] This abstract presents mineralogy and petrology of the Dhofar 019 shergottite and compare it with other known basaltic shergottites. Dhofar 019 is similar to EETA79001, Dar al Ganis, and Zagami, and may be a key sample to understand their relationship and origins.

Goodrich C. A. Chromites in Basaltic Shergottite Sayh Al Uhaymir 005: Implications for Petrogenesis and Relationship to Lherzolitic Shergottites [#1166] Chromites in basaltic shergottite SaU 005 have texturally and compositionally distinct cores and rims. Various features suggest that either cores are xenolithic (derived from a lherzolitic shergottite-like source) or magma mixing occurred after formation of cores.

Xirouchakis D. M. D. S. Schwandt C. S. A Reappraisal of the Mineralogy and Crystallization Features of Los Angeles, A Basaltic [#1589] We examined the mineralogy, -silicate phase relations, and the symplectites in Los Angeles meteorite. We also

modeled the phase relations and T-j02 in the Ca-Mg-Fe-Ti-Si-0 system by performing calculations at 1000 bars (max), and in the range 1000° to 800°C.

Zipfel J. Goodrich C. A. Rare Earth Element Systematics of Trapped Melt Inclusions and Groundmass Phases in Sayh Al Uhaymir 005 [#1292] REEs were analyzed in melt inclusions in olivine and chromite and in groundmass phases of SaU 005. Our results suggest formation of SaU in an open system rather than in a closed system. The nature of the components involved can be constrained.

32nd LPSC Program------53 Herd C. D. K. Jones J. H. Shearer C. K. Papike J. J. Systematics of Ni, Co, Cr and V in Olivine from Planetary Melt Systems: Martian Basalts [#1635] SIMS data for Ni, Co, Cr, and V in olivine in martian basalts is compared to data from lunar and terrestrial basalts. We use experimentally-derived and published D values to calculate as-yet unsampled, olivine-bearing, non-cumulus melt compositions.

Treiman A. H. Goodrich C. A. A Parent Magma for the Nakhla Martian Meteorite: Reconciliation of Estimates from 1-Bar Experiments, Magmatic Inclusions in Olivine, and Magmatic Inclusions in Augite [#1107] The composition of the parent magma for the Nakhla (martian) meteorite has been estimated from mineral-melt partitioning and from magmatic inclusions in olivine and in augite. These independent lines of evidence have converged on small range of likely compositions.

Schwandt C. S. Jones J. H. Mittlefehldt D. W. Treiman A. H. The Magma Composition ofEET79001A: The First Recount [#1913] Using new image processing software, we have re-estimated the groundmass composition ofEET79001A.

Stockstill K. R. Bodnar R. J. McSween H. Y. Jr. Melt Inclusions in Nakhla as Monitors of Parental Melts on Mars [#1788] Melt inclusions in Nakhla may provide valuable information regarding the petrogenesis not available from analyses of the bulk rock. We examine the composition of homogenized melt inclusions in order to constrain the composition of the magma from which Nakhla formed.

Farquhar J. Savarino J. Airieau S. A. Thiemens M. H. Observation of Wavelength-sensitive Mass-independent Sulfur Isotope Effects During S02 Photolysis: Implications for Sulfur Isotope Compositions of SNC Meteorites and Ancient Terrestrial Samples [#1750] We present results of sulfur dioxide photolysis experiments with four light sources and investigate the implications for recent observation of mass-independent sulfur in SNC meteorites (Nakhla and ALH84001) and ancient terrestrial samples.

McCanta M. C. Rutherford M. J. SNC Oxygen Fugacity as Recorded in : An Experimental Study [#1348] An experimental study of pyroxenes has shown that Fe valence state estimates, calculated from electron microprobe analyses, are not accurate. This calls into question all estimates of SNC source region oxygen fugacity based on pyroxene analyses.

Newsom H. E. Shearer C. K. Treiman A. H. Mobile Elements Determined by SIMS Analysis in Hydrous Alteration Materials in the Lafayette Martian Meteorite [#1396] New SIMS data for Li, Be, and Ba in the "iddingsite" alteration material in the Lafayette meteorite argue for multiple low temperature fluids involved in the alteration, possibly carrying mobile elements from the surface.

Aramovich C. J. Herd C. D. K. Papike J. J. Possible Causes for Late-Stage Reaction Textures Associated with Pyroxferroite and Metastable Pyroxenes in the Basaltic Martian Meteorites [#1003] Fine-grained assemblages of fayalite + Si02 ± hedenbergite are observed in Los Angeles, QUE 94201, and Shergotty. These textures are likely from the breakdown of metastable pyroxenes and/or pyroxferroite and modification by diffusional reequilibration.

McKay D. S. Wentworth S. J. Longazo T. G. Thomas-Keprta K. Gibson E. K. Jr. Textures ofSecondary Alteration Zones in Nakhla [#2040] Textures of secondary minerals in cracks in Nakhla are described and illustrated with high resolution SEM and BSE. Some Nakhla textures resemble alteration textures of glass in seafloor basalts. Criteria for inorganic vs. biogenic alteration are discussed.

54 ______32nd LPSC Program Vicenzi E. P. Fahey A. J. Chemical Imaging ofNakhlite Secondary Mineralization at the Sub-Micrometer Length Scale: A TOF-SIMS Study [#2105] This study represents a detailed in situ examination of alteration by way of high spatial resolution secondary ion mass spectroscopy. Full mass spectrum TOF-SIMS imaging results of hydrous veinlets from both Nakhla and Lafayette are compared.

Holland G. Lyon I. C. Cliff B. Lockyer N. P. Vickerman J. C. Halogen Concentrations and Possible Chlorine Zoning in ALH84001 Measured by Time of Flight SIMS and Electron Probe Microanalysis [#1654] We have undertaken analysis of ALH84001 by TOF-SIMS and EPMA. Samples studied using TOF-SIMS show evidence of iodine within chromite. TOF-SIMS and EPMA both suggest chlorine concentrations increase from core to rim of carbonate rosettes.

Golden D. C. Ming D. W. Schwandt C. S. Lauer H. V. Jr. Morris R. V. Lofgren G. E. McKay G. A. Comparision of Carbonate Globules Formed Synthetically by Hydrothermal Precipitation with Martian Meteorite ALH84001 Carbonate Globules [#2054] Carbonate globules similar to those of ALH84001 martian meteorite were synthesized. The synthesis produced a four-layered globule and three subtypes similar to those observed in the meteorite.

Koziol A.M. Magnetite and Carbonate Textures in ALH84001: Experimental Insights [#1425] Synthetic siderite and synthetic siderite-magnesite carbonates were equilibrated with hematite, magnetite and C02 at elevated pressure and temperature. Comparisons are made to textures seen in the carbonate globules in ALH84001.

Bart G. D. Swindle T. D. Olson E. K. Treiman A. H. Xenon and Krypton in Nakhla Mineral Separates [#1363] Xenon and krypton were analyzed in pyroxene, mesostasis, olivine, and olivine-with-iddingsite separates from Nakhla. The Nakhla separate richest in martian atmospheric Xe was the mesostasis.

Ocker K. D. Gilmour J.D. Martian Atmospheric Xenon and Martian 'Interior' Xenon Components in Martian Meteorites [#1782] We discuss possible relationships among martian xenon components and elemental fractionation during trapping of the martian atmosphere.

Edmunson J. Borg L. E. Shearer C. Papike J. J. Davidson K. High-Si Glasses in Basaltic Shergottite DaG 476 and Their Implications for Geochronology [#1439] Trace element analyses show that high-Si glasses found in 476 have significant abundances of rare earth elements. The presence of these glasses in mineral fractions may explain irregularities in Sm-Nd isochrons.

Jones J. H. Alternative Views ofMartian Pb and Os [#1355] Previous Pb isotopic analyses of Shergotty may reflect mixing rather than in situ decay of U. A reevaluation of Os- Pb systematics in SNC's predicts a primitive Pb composition for Dar al Gani 476.

Swindle T. D. Could In Situ Dating Work on Mars? [#1492] Martian meteorites are used to simulate the results of K-Ar and cosmic ray exposure dating of a martian surface. While a single analysis of a single sample might not be useful, multiple analyses should yield a vast improvement in martian chronology.

32nd LPSC Program------55 Chondrules

Connolly H. C. Jr. LoveS. G. The Fonnation of Igneous CAis and Chondrules by Impacts? [#1092] Numerous challenges exist with forming the igneous spheres found within chondrites via collision events in the early solar nebula. We explore these challenges and discuss potential methods to overcome them. Collision models should be received cautiously.

Ciesla F. J. Hood L. L. Chondrule Formation by Passage of a Shock Wave Through a Dust-Gas Suspension [#1367] We will present a model for the formation of chondrules by passage of a shock wave through a dust-gas suspension.

Tsukamoto K. Kobatake H. Nagashima K. Satoh H. Yurimoto H. Crystallization of Cosmic Materials in Micro gravity [#1846] . In-situ observation of cosmic materials was for the first time done in microgravity to investigate the origin of the thermal history. Very large supercooling, 600-l00°C, was needed to reproduce similar texture as natural barred olivine chondrules.

Kletetschka G. Wasilewski P. J. Berdichevsky M. Magnetic Effects on Bjurbole (IA) Chondrules Moving from Space to Terrestrial Environments [#1958] Meteorites contain magnetic material capable of acquiring a wide range of magnetic remanence records by warming from space temperature and magnetic conditions to 300K inside the terrestrial environment.

Nettles J. W. Lofgren G. E. McSween H. Y. Jr. Partially-melted Aggregrate Chondrules in LEW86134: Prelimary Analysis of Textural and Chemical Trends [#1651] The chemistry and texture of partially-melted aggregate chondrules are being studied so that a method to identify the least-melted aggregates can be developed. The least-melted aggregates would represent an inventory of chondrule precursor material.

The Tagish Lake Carbonaceous Chondrite

Mikouchi T. Kasama T. Zolensky M. E. Tachikawa O. Transmission Electron Microscopy of the Matrix Minerals in the Tagish Lake Carbonaceous Chondrite [#1371] We studied the Tagish Lake matrix minerals by TEM. The result shows similarities to CIs (and CRs) and differences from CMs, but its heterogeneity (e.g., carbonate abundance, saponite/serpentine ratio) suggests its complex history.

Herd R. K. Hunt P. A. Venance K. E. Protheroe W. J. Jr. Petrology of the Tagish Lake Carbonaceous Chondrite [#1928] Tagish Lake's petrology varies. Magnesian silicates and phosphates (chondrules and fragments, plus alterations), and lithic fragments, occur in at least two different fine-grained matrices. A petrogenetic sequence is suggested.

Pearson V. K. Sephton M.A. Gilmour I. Franchi I. A. Hydrogen Isotopic Composition of the Tagish Lake Meteorite: Comparison with Other Carbonaceous Chondrites [#1861] A study into the hydrogen isotopic characteristics of whole rock samples of carbonaceous chondrites and their comparison with a whole rock sample of the Tagish Lake meteorite.

Gilmour I. Sephton M.A. Pearson V. K. The Tagish Lake Chondrite and the Interstellar Parent Body Hypothesis [#1969] Investigation of the solvent extractable organic compounds in Tagish Lake. The results are used to test the interstellar parent body hypthesis for the origin of extraterrestrial organic matter.

56 ______32nd LPSC Program Flynn G. J. Keller L. P. Jacobsen C. Wirick S. FTIR and Carbon-XANES Examination of Organic Carbon in Tagish Lake: Evidence for a Moderately Volatile Organic Component [#1593] Four distinct C-XANES spectra, carbonate, amorphous carbon and 2 organic phases, were identified. The 3 micron IR spectrum ofTagish Lake is similar to and Murchison but Tagish Lake contains an organic lost on heating to 100°C for 112 hour.

Refractory Inclusions

Krot A. N. McKeegan K. D. Oxygen-Isotopic Compositions of Forsterite in an Accretionary Rim Around Ca, Al-rich Inclusion and in an Amoeboid Olivine Aggregate from the Reduced CV Chondrite Efremovka and Their Significance [#2016] 160-rich nebular gas is inferred from 0-isotopic composition of forsterites in an accretionary rim around compact Type A CAl and in an amoeboid olivine aggregate from the reduced CV chondrite Efremovka. Isotope exchange of melilite is also discussed.

Hirai K. Hiyagon H. Heterogeneous O Isotopic Distributions in Melilite and Anorthite in a CAifrom the Dar Al Gani 521 Meteorite (CV3) [#1274] Anorthite and melilite in a CAl in Dar al Gani 521 meteorite show two distinct 0 isotopic compositions: 160-rich and 160-poor. Both groups of anorthite grains show canonical 26 AlP7 AI initial ratios, suggesting a very early reheating event.

Goswami J. N. McKeegan K. D. Marhas K. K. Sinha N. Davis A. M. Isotopic Records in Murray and Murchison Hibonites: Implications for the Oxygen Isotopic Reservoirs in the Early Solar System [#1576] Oxygen isotope data for CM hibonites do not correlate with data for other isotopes. The reservoir of the exotic 5o.ri got depleted during the period of hibonite formation, which was not the case for exotic r60. Plausible scenarios are proposed.

Krot A. N. Ulyanov A. A. Meibom A. Keil K. Forsterite-rich Accretionary Rims Around CAis from the Reduced CV3 Chondrite Efremovka: I. Mineralogy and Petrography [#1239] Accretionary rims around Type A and B CAis from the reduced CV3 chondrite Efremovka are aggregates of high- temperature nebular condensates composed of forsterite, Fe,Ni-metal and a refractory component composed of Al- diopside, anorthite, and spinel.

WarkD. A. Boynton W. V. Nebular Flash Heating Events and CAl Rim Formation [#1858] Trace element, mineralogical and isotopic data all point to flash heating events which partly vapourized the outer layers of CAls, leaving a refractory residue there which was later metamorphosed to create the present W ark- Lovering rim layers.

Ivanova M.A. Petaev M. I. Nazarov M. A Taylor L.A. MacPherson G. J. Wood J. A. The First Known Occurrence ofCaAl20 4 in a CAifrom the CH Chondrite NWA 470 [#1957] monoaluminate, CaA120 4 has been identified in a calcium-aluminum-rich inclusion (CAl) from the new CH chondrite NW A 470. CaA120 4 is not predicted to form during equilibrium condensation from a gas of solar composition.

Chaussidon M. Robert F. McKeegan K. D. Krot A. N. Lithium and Boron Isotopic Compositions of Refractory Inclusions from Primitive Chondrites: A Record of Irradiation in the Early Solar System [#1862] The correlations between the 7LifLi, 11 B/~ ratios and the concentration of short lived 10se found in CAis are used to constrain the time scale of irradiation in the early solar nebula.

32nd LPSC Program------57 Angrites, Eucrites, and Other Achondrites

Varela M. E. Kurat G. Brandstatter F. Bonnin-Mosbah M. Metrich N. Glasses in the D'Orbigny [#1803] The D'Orbigny angrite contains abundant glasses, a phase which has not been previously reported from any other angrite. Glasses fill in part open druses and intersticial spaces between major silicates, or occur as glass inclusions in olivine.

Kaneda K. Mikouchi T. Saito A. Sugiyama K. Ohsumi K. Mukai M. Osaka T. Miyata Y. Nakai M. Kasama T. Chikami J. Miyamoto M. Mineralogy of Unique Calcium Silica-Phosphates in Angrites [#2127] Three angrites (Asuka 881371, Sahara 99555 and D'Orbigny) contain unknown silica-phosphates with two different Si!P ratios. One shows similar stoichiometry to , however, there is no matching mineral with the other one.

Yamaguchi A. Mineralogical Study of a Highly Metamorphosed , Nonhwest Africa 011 [#1578] NWA011 is a highly metamorphosed eucrite with anomalous FeO/MnO ratios of pyroxenes. I report mineralogy of NWA011 and compare with other eucrites.

Zhang Y. Lawrence S. Moon N. Dong W. Dunham W. R. Self-Consistency for Each of XRD and Moss bauer Measurements ofFe-Mg Order-Disorder in Onhopyroxene [#1997] Fe-Mg order-disorder in opx determined from Mossbauer is different from that from XRD, but each is internally consistent. The superior sensitivity of our Moss bauer spectrometer has great potential to investigate cooling rates of meteorites.

Tomaru A. Fujimaki H. Yanai K. Evidence for Thennal Metamorphism ofAsuka-882023 [#1508] Asuka-882023 is mesosiderite, recovered from Antarctica. We report the petrological characteristics and chemical compositions to discuss its thermal history.

FogelR. A. The Role of Roedderite in the Fonnation ofAubrites [#2177] The presence of roedderite in signifies that their precursor melts were peralkaline. Peralkaline conditions may be the key to the formation of forsterite in aubrites and allows for a model that derives aubrites directly from E chondrites.

Floss C. Fogel R. A. Diopside-bearing EL6 EET 90102: Insights from Rare Eanh Element Distributions [#1623] We report REE data for EET 90102, the first diopside-bearing EL6. The presence ofYb anomalies in diopside and Sm anomalies in relict chondrules suggest that EET 90102 may have a different history from other equilibrated enstatite chondrites.

Smith C. L. Franchi I. A. Wright I. P. Verchovsky A. B. Grady M. M. Pillinger C. T. An Integrated Mineralogical, Petrographic, Light Stable Isotope and Noble Gas Investigation of Sahara 99201 [#1647] New ureilite Sahara 99201 has been investigated to determine mineralogy, petrography, light stable isotopes and noble gases. The sample is a typical olivine pigeonite ureilite (Fo78, Wo10, En72). C, N, 0 and Ar are consistent with other .

Smith C. L. Franchi I. A. Wright I. P. Grady M. M. Pillinger C. T. New Data on Carbon Isotopic Compositions of Some Ureilites [#1878] We have collected new C data from high resolution stepped combustion analyses of 5 ureilites to better constrain their relationships with 0 and mineralogical/petrographic groupings. This may help the future development of petrogenetic models.

58 ______32nd LPSC Program Yanai K. and Their Subgroups Related with Some Acapulocoites [#1665] Six lodranites are studied and divided to three subgroups. Some meteorites in the subgroup of lodranites are very similar to those of of the primitive achondrites for their mineral assemblages.

Asteroid-Meteorite Connections

Berthoud M. G. Bell J. F. III Clark B. E. Gaffey M. J. Testing Spectral Methods for Asteroid Surface Compositional Determination Using Spectroscopic and Compositional Data of Ordinary Chondrite Meteorites [#2080] This work tests a method to determine the orthopyroxene versus olivine abundance ratio from VNIR spectra. Abundances predicted from spectral measurements are compared to the abundances from laboratory examinations of meteorites.

Benoit P. H. Akridge J. M. C. Sears D. W. G. The Orbital Distribution of Meteorites Based on High Temperature Thermoluminescence: 2. Orbits ofMeteoroids over the Last Million Years [#1924] We use high temperature TL data to evaluate perihelia of Antarctic meteorites. Perihelion has been constant for the ordinary chondrites over the last 40,000-100,000 years.

Hapke B. W. Progress in Theoretical Modeling of in Lunar and Asteroid [#1132] Space weathering affects spectral slopes and band depths, but not band central wavelengths. Hence, band centers can be validly used to match meteorites and asteroid classes. Simple analytic models can successfully account for space weathering effects.

Komatsu M. Miyamoto M. Mikouchi T. Mineralogical Examination ofYamato 75258 (LL6) Heated at Different Oxygen Fugacities [#1583] We report our initial examination of textural and compositional changes observed for the heated LL6 chondrite under different oxygen fugacities in order to identify the responsible phases(s) that affected the spectra.

Hiroi T. Zolensky M. E. Pieters C. M. Discovery of the First D-Asteroid Spectral Counterpart: Tagish Lake Meteorite [#1776] We have discovered the first meteorite, Tagish Lake, which shows a reflectance spectrum very similar to that of the D asteroids, especially 368 Haidea. D and P asteroids have been believed to be "supercarbonaceous" unlike any meteorite.

Britt D. T. Consolmagno G. J. Asteroid Bulk Density: Implications for the Structure ofAsteroids [#1611] The increase in asteroid bulk density measurements provides insight on asteroid structure. The largest asteroids appear to have zero macroporosity while the remaining population is divided between fractured but coherent objects and rubble piles.

A Year NEAR Eros

Britt D. T. Yeomans D. K. Consolmagno G. J. The Porosity of433 Eros [#1212] 3 Data from the NEAR mission show the bulk density of 433 Eros is 2.67 g/cm . Given an Lor LL composition, the bulk porosity of Eros is in the range of25-29% and the macroporosity is 14-18%. This is consistent with a fractured, but coherent asteroid.

32nd LPSC Program------59 McCoy T. J. Gaffey M. J. Bell J. F. III Boynton W. V. Burbine T. H. Chapman C. R. Cheng A. F. Clark B. E. Clark P. E. Evans L. G. Gorenstein P. Lucey P. McFadden L. Murchie S. Nittler L. R. Robinson M.S. Squyres S. W. Starr R. D. Trombka J.l. Veverka J. The Composition of433 Eros: A Mineralogical-Chemical Synthesis [#1556] We report on an effort with the NIS/MSI and XGRS teams to synthesize our data sets to constrain the relationship between Eros and meteorites; the mineralogy, abundances and compositions of Eros; and the processes that formed Eros.

Evans L. G. Trombka J. I. Starr R. D. Boynton W. V. Bruckner J. Reedy R. C. Preliminary Results of the NEAR Gamma-Ray Spectrometer [#1812] The NEAR spacecraft was put into a 35 km orbit on December 13, 2000. This is first opportunity for the Gamma- ray Spectrometer to collect good geochemical data from Eros. Preliminary measurements for a number of key elements are in good agreement with predictions.

Clark P. E. Killen R. M. Murphy M. E. McCoy T. J. Examination of the Apparent Sulfur and Other Element Depletions of433 Eros Relative to Ordinary Chondrites [#1893] NEAR XRS measurements of 433 Eros are most consistent with chondrites, but important compositional differences remain, particularly in regard to S abundance. S depletion appears explainable, in terms of impact volatilization processes.

Bussey D. B. J. Robinson M.S. Edwards K. Thomas P. Joseph J. Mapping and Normalised Reflectance of Eros [#2137] The NEAR Shoemaker spacecraft has returned images of the entire surface of Eros. A global shape model allows photometric corrections to be made to the data, permitting analysis of variations in 1/F across the surface to be conducted.

Mercury - Micro Session

Dombard A J. Hauck S. A. II SolomonS. C. Phillips R. J. Potential for Long-Wavelength Folding on Mercury [#2035] We use a simple analytic model to determine that Mercury's near-surface may have been unstable against folding; the resultant long-wavelength, low-amplitude folds could accommodate significant contractional strain associated with planetary cooling.

Wilkison S. L. Robinson M.S. Cook A. C. Watters T. R. Topography of Mercurian Craters [#2118] We present results of crater topography measurements from digital elevation models derived from stereo imagery of the Discovery region on Mercury.

Watters T. R. Robinson M.S. Cook A C. Topography of Large-Scale Lobate Scarps in the Southern Hemisphere of Mercury [#1613] Digital elevation data are used to examine the topography of Adventure, Resolution, and Discovery . These three thrust fault structures may have been localized by mechanical discontinuities introduced by one or more ancient buried impact basins.

Space Science Education

Kanefsky B. Barlow N. G. Gulick V. C. Can Distributed Volunteers Accomplish Massive Data Analysis Tasks? [#1272] We argue that many image analysis tasks can be performed by distributed amateurs. Our pilot study, with crater surveying and classification, has produced encouraging results in terms of both quantity ( 100,000 crater entries in 2 ) and quality.

60 ______32nd LPSC Program Eichhorn G. Accomazzi A. Grant C. S. Kurtz M. J. Murray S. S. On-Line Literature Search and Full Articles in the NASA ADS [#1139] The ADS provides free world-wide on-line access to over 2.2 million abstracts and over 1 million scanned pages of the astronomical and planetary literature plus over 4 million links to other relevant on-line information at http://ads.harvard.edu.

Binzel R. P. BusS. J. Burbine T. H. Rivkin A. S. Announcing the Availability of the MIT SMASS and SMASSIR Data Sets [#1633] We announce the release of visible and near-infrared reflectance spectroscopy measurements for nearly 2000 asteroids obtained by the MIT Small Main-Belt Asteroid Spectroscopic Survey (SMASS) program. Data are being released via http://smass.mit.edu.

Fisher D. K. Leon N.J. L. From Binary Notation to Gravitational Waves: Rocket Scitnce Made Easy [#1763] The Space Place is a NASA educational outreach program open to all NASA missions, studies, and instruments. It uses diverse media (web, print, displays, hands-on activities) to deliver high-quality products through a highly leveraged infrastructure.

Garcia P. A. Eliason E. M. Barrett J. M. Creating Cartographic Image Maps on the Web Using PDS MAP-A-PLANET [#2046] Use the PDS MAP-A-PLANET website to create cartographic image maps from MDIM data for Venus, Mars, Earth's Moon, and Jupiter's Moon Callisto.

Roark J. H. Frey H. V. GRIDVIEW: Recent Improvements in Research and Education Software for Exploring Mars Topography [#1618] We have developed an IDL scientific visualization software tool called GRIDVIEW that can be used in research and education to explore and study the most recent MOLA gridded topography of Mars (http://denali.gsfc.nasa.gov/mola_pub/gridview).

Klug S. L. Christensen P. R. Involving Students in Active Planetary Research During the 200I Mars Odyssey Mission: The THEMIS Student Imaging Project [#1965] The THEMIS Student Imaging Project is a research and inquiry-based project that will give students the opportunity to participate in the exploration of Mars by planning, acquiring, and analyzing real images of Mars.

Heather D. J. Foing B. H. van Susante P. Almeida M. Outreach and Education from ESA 's SMART-I Mission to the Moon [#1983] We present some of the possible outreach and education activities that are being considered for use during ESA's SMART-I mission to the Moon, including 'adopt a crater', 'illuminating poles' and others. Packages will be produced for all levels.

Theno T. W. Yingst R. A. Brunsell E. Pietsch J. The Moonlink, NEARlink and Marslink Program Model: Bringing Space Missions into the Classroom [#1749] Space Explorers, Inc. has created a set of standards-based Internet education programs that give students basic concepts, mission simulations and access to actual spacecraft data, via a spiffy 3D online lab.

Kadel S.D. Greeley R. Mars: An Electronic Field Trip from Mission Planning to Image Interpretation [#1362] The Arizona State University Mars Electronic Field Trip (EFT) is a newly developed interactive educational exercise simulating an orbiter mission to Mars. It is available to students and educators via the world-wide web at http://europa.la.asu.edu/spl.

32nd LPSC Program 61 Dusenbery P. B. Farrand W. H. The MarsQuest Traveling Exhibition: The First Year and Beyond [#2018] The MarsQuest traveling exhibition has completed its first year on the road. The exhibition and associated education programs is described.

Hicks T. L. Johnson K. T. M. X-treme Science! Exploring Oceans, Volcanoes and Outer Space: A New Exhibit at the Bishop Museum [#1968] "X-treme Science! Exploring Oceans, Volcanoes, and Outer Space," is the largest exhibit ever developed in-house at the Bishop Museum. The purpose of this exhibit is to introduce some of the explorers in Hawaii who are doing innovative research.

Lindstrom M. M. Allen J. S. Mortillaro C. Ducceschi C. Rawlings P. Stocco K. Tobola K. Olendzenski L. Angerrniller L. An Astrobiology Microbes Exhibit and Education Module [#1994] A JSC-SCH team has produced an astrobiology exhibit and education module to augment the "Microbes!" traveling exhibit. The astrobiology section focuses on life in extreme environments and considers the possibility of extraterrestrrial life.

Treiman A. H. Thompson P. B. The ALTA II Spectrometer: A Tool for Teaching About Light and Remote Sensing [#1104] Bright leaves on dark sky Beyond the brilliant rainbow Vision fades away

Hagerty J. J. Karner J. M. Newsom H. E. Jones R. H. Meteorite or Meteor-Wrong? [#1636] We have developed a hands-on activity that introduces students to planetary science, the scientific method, and to high-tech machines. During this activity students use empirical tests to determine if an unknown sample is a meteorite or meteor-wrong.

Kovacs Zs. I. Kov:iri I. E. Balogh R. Varga V. Kovacs T. Hegyi S. Berczi Sz. Planetary Science Education Via Construction of the Hunveyor-3 Experimental Planetary in Berzsenyi College, Szombathely, Hungary: Rock Radioactivity Measurements [#1130] We built the Hunveyor-3 minimal experimental lander space probe of Surveyor type in the Berzsenyi College, Hungary. With a new instrument on Hunveyors for natural radioactivity we measured and compared different rock types with planetary importance.

Foldi T. Berczi Sz. Koris A. Kovacs B. Hegyi S. Kovacs Zs. I. Rosko F. New Experiment Plans (Electrostatic, Lunar Dust Measuring, Rio-Filtering) to the Hunveyor Educational Landers of Universities and Colleges in Hungary [#1301] Measurement on levitating dust-pillow layer above lunar surface (a), and life components (from cell to large- molecule) selecting (nanofilters) and measuring (fiber-opto-chemical sensors) instrument (b), were planned for educational robot Hunveyor.

62 ______32nd LPSC Program Wednesday, March 14, 2001 CARBONACEOUS CHONDRITES 8:30 a.m. Room A

Chairs: D. S. Lauretta J.Farquhar

Morlok A.* Bischoff A. Henkel T. Rost D. Stephan T. Jessberger E. K. The Chemical Heterogeneity of CI Chondrites [#1530] Silicate-rich fragments from CI chondrites were analyzed with electron microprobe and TOP-SIMS to investigate chemical heterogeneities in these meteorites. Considerable variations were found for most major elements, especially for S, K, Na and P.

Gounelle M. * Zolensky M. E. A Terrestrial Origin for Sulfate Veins in Cll Chondrites [#1609] We have traced back the history of sulfate veins in Cil chondrites. We suggest they formed in Museum's cabinets through dissolution/reprecipitation of original extraterrestrial sulfates. We discuss the implications of this finding.

Rosenberg N.D.* Browning L. Bourcier W. L. Aqueous Alteration of CM Carbonaceous Chondrites [#1406] Results from a geochemical modeling study suggest that the environment conditions under which CM asteroidal parent bodies were altered was strongly basic and reducing, and may have included large quantities of hydrogen and methane gases.

Takaoka N. * Nakamura T. Noguchi T. Tonui E. Gounelle M. Zolensky M. E. Ebisawa N. Osawa T. Okazaki R. Nagao K. Yoneda S. Sayama CM2 Chondrite: Fresh but Heavily Altered [#1645] Noble gas composition and mineralogy of Sayama meteorite, that fell in Japan and recently identified as a CM2 chodmite, revealed many unique features, indicating that it experienced extensive aqueous alteration under highly oxidized condition compared with typical CMs.

Osawa T. * Kagi H. Nagao K. Spectroscopic Classification of Carbonaceous Chondrites from the Speciation of Hydrous Components [#1513] FTIR analyses have been carried out for Antarctic carbonaceous chondrites and Sayama meteorite which is a just- recognized Japanese carbonaceous chondrite. A good correlation between chemical and infrared spectroscopic classification was obtained.

Cody G. D. III* C. M. O'D. Tera F. Solid State Nuclear Magnetic Resonance Studies of the Murchison Organic Macromolecule [#2019] We have used high speed 1H (DEPTH) and 13C (V ACP MAS-slow spinning) solid state NMR to determine the contributions of protonated vs non-protonated carbon in the Murchison Macromolecule.

McCollom T. M. * Experimental Studies on the Formation of Meteorite Organics During Hydrothermal Alteration [#1118] Formation of organic compounds was observed during decomposition of iron oxalate and siderite. The products closely resemble those observed in meteorites, suggesting that some meteorite organics may form in situ concurrent with mineral alteration.

Airieau S. A.* Farquhar J. Jackson T. L. Leshin L.A. Thiemens M. H. Bao H. Oxygen Isotope Systematics ofCI and CM Chondrite Sulfate: Implications for Evolution and Mobility of Water in Planetesimals [#1744] We report oxygen isotope composition of sulfate from CM and CI chondrites that is consistent with the assertion that the sulfate analyzed in all CM chondrites extraterrestrial origin insufficient to demonstrate the same for CI chondrite sulfate.

32nd LPSC Program------63 Cosarinsky M. * Leshin L.A. MacPherson G. J. Guan Y. Isotopic and Petrographic Observations of the Fine-grained Rim Around a Vigarano Refractory Inclusion [#1859] We report oxygen isotopic compositions of multiple phases from the fine-grained rim around a Vigarano CAl. The large isotopic heterogeneity observed appears to preclude extensive processing after rim formation.

Pravdivtseva O. V. * Hohenberg C. M. The I-Xe System in Magnetic Fractions from CV3 Meteorites [#2176] New I-Xe data obtained for magnetic separates from CV3 meteorites Kaba, Bali, Mokoia.

Brearley A. J. * Hutcheon I. D. Browning L. Compositional Zoning and Mn-Cr Systematics in Carbonates from the Y791198 CM2 Carbonaceous Chondrite [#1458] Cathodoluminescence and microprobe analyses show that carbonates in Y791198 exhibit complex zoning. Cr-Mn dating suggests formation of carbonates 10 Ma after CAl formation.

Lauretta D. S. * Klaue B. Blum J.D. Buseck P. R. Thermal Analysis of Labile Trace Elements in CM and CV Carbonaceous Chondrites Using Inductively Coupled Plasma-Mass Spectrometry [#1356] We developed a technique to measure the thermal release profiles of a suite of labile elements (Zn, As, Se, Cd, In, Sn, Sb, Te, Pt, Hg, Au, Tl, Pb, Bi). Conclusions are reached about the behavior of each element during parent-body alteration.

Shinotsuka K. Ebihara M. * Detailed Abundances ofRare Earth Elements Among Carbonaceous Chondrites [#1771] Extensive analyses of bulk carbonaceous chondrites for REE are performed using ICP-MS. Though each group of carbonaceous chondrites have variable REE abundance patterns, CV chondrite show characteristic pattern similar to that of group II CAl.

64 ______32nd LPSC Program Wednesday, March 14, 2001 10: INSIDE AND OUT 8:30 a.m. Room B

Chairs: J. A. Rathbun L. Wilson

Baloga S. M. * Glaze L. S. Potential Mechanisms for the Formation of Lava Flow Auras on Ia [#1306] We propose three hypotheses for the formation of bright conforming borders of lobate lava flows on lo, referred to as auras. We use the stochastic-ballistic model to test the hypotheses and explore temperature and compositional constraints.

Cataldo V. * Wilson L. Modelling Eruption Conditions at the Pillan and Pele Volcanoes on Io [#1553] Modelling the dynamics and thermodynamics of explosive eruptions at the Pillan and Pele vents on Io allows us to

estimate mass eruption rates, mean pyroclast sizes, and amounts of near-surface S02 mixing with the magma.

Jaeger W. L. * Turtle E. P. Keszthelyi L. P. McEwen A. S. Orogenic Tectonism on Io [#2045] We estimate Io's lithosphere to be> 14 km thick. This suggests that mountain uplift on Io is dominantly driven by subsidence-related stresses, though thermal expansion plays a non-negligible role in orogenic tectonics.

Matson D. L. * Davies A. G. Veeder G. J. Blaney D. L. Johnson T.V. Io: Heat Flow and Surface Age [#1938] Assuming Io is completely resurfaced with volcanics, ages to surface units on Io can be assigned as a function of temperature.

Schmitt B.* Rodriguez S. NIMS Team Tentative Identification of Local Deposits of Cl2S02 at Ia 's Surface [#1710] We tentatively identify a band at 3.915 micron observed locally on Io in NIMS spectra with Cl2S02 diluted in solid S02• It is prefered over H2S from converging arguments considering their spectra, physical state, abundance, volatility and chemistry.

Granahan J. C.* Fanale F. P. Carlson R. W. Smythe W. D. Galileo NIMS Team Galileo SSI Team Infrared Spectral Signatures for lo's Dark and Green Spots [#1650] This spectral study of Io identifies the infrared components of the visible spectral units (green and dark) as identified by Galileo. The green units possess sulfur dioxide and the dark units are associated with infrared thermal signatures.

Lopes R. M. C. * Smythe W. D. Kamp L. W. Doute S. Carlson R. W. McEwen A. S. Geissler P. E. Galileo NIMS Team Ia's Diverse Styles ofVolcanic Activity: Results from Galileo NIMS [#2021] Observations by Galileo's Near-Infrared Mapping Spectrometer were used to map the thermal structure of several of Io's hot spots, revealing different styles of volcanism.

Davies A. G. * Galileo NIMS Team Power Outputs and Volumetric Eruption Rates for Ionian Volcanoes from Galileo-NIMS Data [#1991] Volumetric eruption rates for a number oflo volcanoes are calculated as a function of volcanic thermal output. Thermal output is determined using 2-temperature fits to NIMS data. Typical eruption rates are larger than terrestrial eruptions of similar style.

32nd LPSC Program------65 Zolotov M. Yu. * Fegley B. Jr. Chemistry and Vent Pressure of Very High-Temperature Gases Emitted from Pele Volcano on Io [#1474] Galileo data for magma temperature at Pele and HST chemical data (S02, S2, and SO) for Pele plumes were used to evaluate vent pressure (10-4- 2 bar), the oxidation state (2-3 logj02 units below Ni-NiO), and chemistry of volcanic gases.

Rathbun J. A.* Spencer J. R. Davies A. G. Howell R. R. Eruption Mechanisms for Loki, Io: Inferences Based on Galileo and Groundbased Data [#1456] A wealth of data about Loki, the most powerful volcano on Io, has been collected and here, we try to begin synthesis of these data. These data suggest periodic lava lake overturn. Further, these eruptions may be truely periodic, and therefore predictable.

Doute S. * Lopes-Gautier R. Smythe W. D. Kamp L. W. Carlson R. Galileo NIMS Team

Dynamics and Evolution ofS02 Gas Condensation Around -like Volcanic Plumes on Io as Seen by the Near Infrared Mapping Spectrometer [#2036] Near Infrared Mapping Spectrometer data acquired during the 124, 25, and 27 Io's Fly-bys by Galileo are analyzed to map the S02 frost abundance and granularity. This allows a better understanding of the dynamics and evolution of gas condensation around volcanic plumes.

Milazzo M. P. * Keszthelyi L. P. McEwen A. S. Galileo SSI Team Are Prometheus-type Plumes on Io Produced by Lava-S02 Interactions at the Flow Fronts? [#1929] We have investigated whether Lava-S02 interactions at the flow fronts can produce the Prometheus-type plumes on Io.

Radebaugh J. * Keszthelyi L. P. McEwen A. S. Galileo SSI Team Paterae on Io: Galileo Images, Sizes, Distribution, and Ages [#2088] Galileo images of Io from 1999 and 2000 reveal new information about its paterae. The mean of 417 paterae on Io (79% of the surface) is 41.0 krn, with fewer and larger paterae poleward of ±25° latitude. An age progression of paterae can be seen in high resolution images.

66 ______32nd LPSC Program Wednesday, March 14, 2001 MARS SURFACE DRAINAGE: OCEANS, VALLEY NETWORKS, AND GULLIES 8:30 a.m. Room C

Chairs: W. B. Banerdt V. C. Gulick

Baker V. R. * Strom R. G. Kargel J. S. Dohm J. M. Ferris J. C. Very Recent, Water-related Landforms on Mars [#1619] Very recent glacial, fluvial, lacustrine, periglacial, and mass-movement hillslope landforms indicate a causative episode or episodes of relatively high atmospheric pressure and extensive movement of water through and precipitation from the atmosphere.

Parker T. J. * Grant J. A. B. J. Rice J. W. A Comparison of MOC and MOLA Observations of Northern Plains "Contacts" with Coastal Landforms of the Bonneville Basin, Utah [#2051] The Mars Global Surveyor has now completed its nominal mission. Among its many science objectives, the question of whether or not lakes or oceans existed on Mars is arguably one of the most provocative.

Banerdt W. B. * Vidal A. Surface Drainage on Mars [#1488] The role of bears directly on investigations crossing a wide range of disciplines, including , geochemistry, and biology. We have calculated the potential flow patterns of water using MOLA topographic data.

Parsons J. D. * Wet Evidence for a Dry Mars [#1256] Recent mapping efforts of the oceanic seafloor and underlying stratigraphy illustrate the ubiquity of certain morphologic features. The processes responsible for these forms will be discussed along with their relevance martian surface morphology.

Maxwell T. A. * Craddock R. A. Martian Highland Drainage Basins: Basin Fill Characteristics from MOC [#2047] MOC images of the highland plains of Mars indicate that sediments from the neighboring highlands were responsible for infilling several, but not all basins. Associations of features are used to determine the most likely origin of these materials.

Mest S. C. * Crown D. A. Harbert W. Highland Drainage Basins and Valley Networks in the Eastern Hellas Region ofMars [#1457] Geologic mapping of highland terrains east of the Hellas basin resulted in identification of twelve drainage basins. Morphometric analysis of the basins using Arclnfo and MOLA will provide a better understanding of the degradation of the highlands.

Aharonson O. * Zuber M. T. Rothman D. H. Schorghofer N. Phillips R. J. Williams R. M. E. Valley Network Morphology and Topographic Gradients on Mars [#2153] Data returned from the Mars Orbiter Laser Altimeter allows construction of a high precision . Quantitative investigations into the geomorphic properties of drainage features, similar to ones carried out on Earth, are now possible.

HechtM. H.* Metastability of Liquid Water on Mars [#1364] This talk reviews reasonable spatial and temporal scales for melting and flowing of water on Mars, and relates them to plausible martian conditions.

32nd LPSC Program------67 Mellon M. T. * Phillips R. J. Recent and the Source of Liquid Water [#1182] Reported observations of young gully-like features on Mars suggest that liquid water has recently flowed on the surface. Yet Mars is globally covered by permafrost. We present a mechanism for the occurrence of liquid water in the near-surface environment.

Gulick V. C.* Some Ground Water Considerations Regarding the Formation ofSmall Martian Gullies [#2193] Discovery of young valleys on Mars has renewed interest in mechanisms capable of producing near-surface water under present climatic conditions. This abstract discusses modeling results of small martian hydrothermal systems.

Bridges N. T. * Herkenhoff K. E. Titus T. N. Kieffer H. H. Ephemeral Dark Spots Associated with Martian Gullies [#2126] Seasonal spots confined to the channels of the recently-discovered martian gullies are described and explanations offered for their origin.

Cabral N. A. * Wynn-Williams D. D. Crawford D. A. Grin E. A. Recent Aqueous Environments in Impact Craters and the Astrobiological Exploration of Mars [#1251] Three cases of recent aqueous environments are surveyed at MOC high-resolution in the E-Gorgonum, Newton and craters and their astrobiological implications assessed.

Musselwhite D. S. * Swindle T. D. Lunine J. I. Liquid C02 Breakout and the Formation of Recent Small Gullies on Mars [#1030] We show that a C02 suspended flow could have produced the recent small gullies on Mars. The model involves the build-up of liquid-C02 behind a dry-ice barrier a few meters into the cliff face and about a hundred meters below the top of the cliff.

68 ______32nd LPSC Program Wednesday, March 14, 2001 PLANETARY FORMATION AND EARLY EVOLUTION I 8:30 a.m. Room D

Chairs: M. H. Bulmer A. N. Halliday

Halliday A. N. * Porcelli D. Strontium Isotopes and the Paleocosmochemistry of the Inner Solar System [#1415] Strontium isotope data indicate loss of alkalies during accretion of planetesimals and planets. Time-integrated Rb/Sr ratios are consistent with substantial quantities ( 1% and 10%) of C and S in the present earth's core if retained during accretion.

Yin Q. Z. * Jacobsen S. B. Blichert-Toft J. Telouk P. Albarede F. Nb-Zr and Hf-W Isotope Systematics: Applications to Early Solar System Chronology and Planetary Differentiation [#2128] We present new Zr isotope data that provide constraints on the planetary differentiation time scale.

Jacobsen S. B. * Yin Q. Z. Core-Formation Models and Extinct Nuclides [#1961] Zr and W isotope data are consistent with the Earth's core forming in a single event subsequent to about 113 Ma after the formation of the solar system. With continuous models of core formation the process can start early.

TeraF. * Accurate Lead Isochrons for Terrestrial Rocks: Modifying the Two Stage Model to Accommodate the Many Reservoirs They Indicate [#2136] Accurate dating of rocks indicates existence of multiple ancient reservoirs. This required modification of the standard two-stage evolution models. Intermediate position of the undifferentiated Earth indicates there may be no Pb paradox.

Wasserman A. A. Chabot N. L. Draper D. S. Agee C. B. High Pressure Anhydrous Phase Relations of L5: An Analog for Martian Mantle [#2029] Homestead L5 is a viable analog to martian mantle. High pressure phase relations help elucidate martian magmatic processes.

Karner J. M. * Papike J. J. Shearer C. K. Chemistry of Olivine from Planetary Basalts: Earth-Moon Comparisons Emphasizing Mn/Fe and Co/Ni Systematics [#1017] Major and trace element trends of basaltic olivines from the Earth and Moon indicate planetary origins and settings.

Dyar M.D. * Delaney J. S. Tegner C. Ferric Iron in Feldspar as an Indicator of Evolution of Planetary Oxygen Fugacity [#1065] 3 Synchrotron micro-XANES analysis of felsic magma constituents allows us to constrain independently Fe + and hence the oxygen fugacity of magmatic systems. We focus here on feldspar from anorthosites and intrusive complexes found on four different bodies.

Hughes S. S. * Mafic Volcanism on the Eastern Snake River Plain: Petrologic Evaluation ofa Terrestrial Analogue for Planetary Bodies [#2147] Lava plains and flood basalts are the principal manifestations of magmatism associated with the evolution of planetary lithospheres. Geochemical analyses are used to evaluate time-space variations in Snake River Plain tholeiites.

32nd LPSC Program------69 Bulmer M. H. * Campbell B. A. Byrnes J. Field Studies and Radar Remote Sensing ofSilicic Lava Flows [#1850] The eruption of large evolved (>60% Si02) lava flows on Earth has never been witnessed, making careful data analyses combined with numerical (and possibly physical) modeling the only way to understand them.

Nijman W. * S. T. Collapse Structures in the Early Earth and Possible Planetary Equivalents [#1289] Lower Archean, 100 km-scale, crustal collapse structures are assumed to host Earth's earliest sedimentary basins. Felsic volcanism and hydrothermal activity accompany collapse. The structures may be compared to coronas of Venus.

70 ______32nd LPSC Program Wednesday, March 14, 2001 PRESOLAR GRAINS Session dedicated to the memory ofJohn H. Reynolds 1:30 p.m. Room A

One of the giants of planetary science passed away last November. John Reynolds will be remembered as a great scientist and teacher by all who knew him scientifically or personally, and especially by those who had the chance to work directly with him. Much of the field of noble gas cosmochemistry as we know it today is founded in discoveries that exploded out of his laboratory at Berkeley in the 1960s: the first detection of the 129Xe daughter of 1291 decay in meteorites and with it the birth of extinct radionuclide chronometry; measurement of isotopic patterns in meteoritic Xe that started a still unfinished search for the processes linking noble gas evolution in different solar-system bodies; and development of the Ar-Ar dating method, now an indispensable tool for terrestrial and extraterrestrial chronological studies. All these and more were made possible by John's invention of the very special "Reynolds type" mass spectrometer that spread worldwide and drove the growth of noble gas research in the decades before commercial instruments began to approach its capabilities. Most who work in this discipline today either cut their teeth in John's laboratory or can trace their scientific lineage back to a Reynolds "graduate". They all measure themselves, conscientiously or not, against the standards he set for them and for the whole field of planetary science, back when it was just being and as it grew over the years. There was no one more admired, or to whom we owe a greater debt. -Robert Pepin

Chairs: R. O. Pepin C. M. Hohenberg

Pellin M. J. Davis A.M.* Savina M. R. Kashiv Y. Clayton R.N. Lewis R. S. AmariS. Barium Isotopes in Single Presolar Grains [#2125] Barium isotopic compositions of single presolar grains were measured by laser ablation laser resonant ionization mass spectrometry and the implications of the data for stellar processes are discussed.

Besmehn A. * Hoppe P. - and Calcium-Isotopic Compositions of Presolar Silicon Nitride Grains from the Indarch [#1188] 44 Presolar Si3N4 grains have Caf0Ca ratios compatible with solar and there is no appar~nt evidence for the presence of now extinct ~i. One grain shows a clear excess in 42Ca. This, however, is not in conflict with the proposed SN origin.

Zinner E. * Amari S. Gallina R. Lugaro M. Presolar SiC from Parent Stars of Varying Metallicity and the Galactic Evolution of the Si Isotopes [#1677] The Si isotopic ratios measured in mainstream, Y and Z type presolar Si grains from primitive meteorites indicate that the grains come from C-rich AGB stars with a range of metallicities.

Clayton D. D. * Deneault E. Meyer B. S. The L.-S. Abundances of Linear Carbon-Chain Molecules in Supernovae [#1109] This paper evaluates the condensation of carbon solids in a gas of pure C and 0 atoms when these exist within the interior of an expanding young supernova. We calculate the abundances of large carbon molecules, which serve as nucleations for condensation of graphites.

Alexander C. M. O'D. Nittler L. R * Tera F. The Search of Presolar Silicates and the54Cr Carrier [#2191] We use a novel dissolution technique to search for presolar silicates and an anomlous chromium carrier.

Mohapatra R. Merchel S. Ott U. * Herpers U. Michel R. Recoil of Spallation Xenon: Hope for Dating Presolar SiC [#1296] The recoil range of spallation 126Xe produced by irradiation with 1200 MeV in a Ba glas has been determined. With an inferred range in silicon carbide of 0.16 p.m, determining aXe-based presolar exposure age for SiC grains seems feasible.

32nd LPSC Program 71 Huss G. R. * Meshik A. P. Hohenberg C. M. Presolar Grains in CM2 Chondrites [#1685] New abundance determinations for presolar diamond, SiC, and graphite in CM2 chondrites are presented and used to infer initial abundances in primitive solar-system material. Modifications of initial abundances reflect early-solar- system processes.

Busemann H. * Baur H. Wieler R. Isotopic Ratios in Carbonaceous Chondrites: Significant for the Early Solar Nebula and Circumstellar Diamonds? [#1598] Stepwise etching of acid-resistant residues from carbonaceous chondrites yields a new, extraordinarily low He isotopic ratio for phase Q that might represent early solar nebula composition. A much lower ratio possibly characterizes He-P3 from circumstellar diamonds.

Meshik A. P. * Pravdivtseva 0. V. Hohenberg C. M. Selective Laser Extraction ofXe-Hfrom Xe-HL in Meteoritic Nanodiamonds: Real Effect or Experimental Artifact? [#2158] New, suggestive results of selective laser extraction of Xe-H were obtained for Indarch and Allende nanodiamonds. However, due to large experimental uncertainties we cannot make any certain conclusions on the separability ofXe- HL.

Verchovsky A. B. * Sephton M.A. Wright I. P. Fillinger C. T. Separation of Q-Noble Gas Carrier from Bulk Carbon in Enstatite Chondrites by Stepped Combustion [#1706] Detailed stepped combustion ofHF-HCl residues from carbonaceous and enstatite chondrites suggest Q-noble gas carrier is different from bulk carbon in the meteorites.

Mostefaoui S. * Hoppe P. Ott U. El Goresy A. Large Nitrogen-IS Enrichments in Silicon Carbide and Carbon Grains from the Bencubbin Meteorite [#1173] We searched for 15N-rich phases in acid resistant residues of the Bencubbin meteorite. Particularly interesting 15 constituents in the residues are carbon, SiC, and Al20 3 grains. We encountered large N-excesses in SiC and carbon grains suggesting interstellar origins.

Charnley S. B. * Rodgers S.D. On an Interstellar Origin for 15N Fractionation in Meteorites [#1437] We have shown that interstellar chemistry could produce much larger 15N/14N fractionation in specific interstellar molecules than previously thought.

Butterworth A. L. * Sephton M. A. Gilmour I. Dual Isotopic Composition ofMethane in Murchison Meteorite [#1910] Dual isotopic composition (H and C) of methane extracted from a small sample of Murchison meteorite reveals a deuterium enrichment for this molecule, indicating the presence of interstellar hydrogen.

72 ______32nd LPSC Program Wednesday, March 14, 2001 SMALL BODIES: SHAKE, BAKE, MICROWAVE, LET STAND 1:30 p.m. Room B

Chairs: K. S. Jarvis D. W. G. Sears

Sears D. W. G. * Allen C. Britt D. Brownlee D. E. Cheng A. F. Chapman C. R. Clark B. C. Drake B. G. Franchi I. A. Gorevan S. Kochan H. Lewis J. S. Lindstrom M. M. Nishiizumi K. Pieters C. M. Race M. S. Scheeres D. J. E. R. D. Yano H. Near-Earth Asteroid Sample Return Missions [#1891] The rate of discovery of new NEAs and the success of D-S 1 and NEAR-Shoemaker, suggest that sample return from NEAs is now technically feasible. Here we present a summary of a recent workshop on the topic.

Nolan M. C. * Margot J.-L. Howell E. S. Benner L.A. M. Ostro S. J. Jurgens R. F. Giorgini J.D. Campbell D. B. Radar Observations of Near-Earth Asteroids 2000 UG 11 and 2000 UK11 [#2055] Two small near-Earth asteroids, 2000 UG11 and 2000 UK11 were observed using the Arecibo and Goldstone radars a week after their discovery. 2000 UK11 is a rapidly rotating (3 min) -30m solid body. 2000 UG 11 is two bodies separated by at least 300 m.

Margot J. L. * Nolan M. C. Benner L.A. M. Ostro S. J. Jurgens R. F. Giorgini J.D. Slade M.A. Campbell D. B. Radar Observations of Binary Asteroid 2000 DP107 [#1754] We present the discovery and characterization ofDP107 with the Goldstone and Arecibo radars, including a detailed sequence of images showing the system's orbital motion.

Gaffey M. J. * Asteroids: Does Space Weathering Matter? [#1587] The interpretive calibrations and methodologies used to extract mineralogy from asteroidal spectra appear to remain valid until the space weathering process is advanced to a degree which appears to be rare or absent on asteroid surfaces.

Rivkin A. S. * Davies J. K. Clark B. E. Trilling D. E. Brown R. H. Aqueous Alteration on S Asteroid 6 Hebe? [#1723] We have observed 6 Hebe in the 1.9-3.6 micron region and found evidence for hydrated minerals on its surface, varying with rotational phase. We also find its continuum behavior unlike a mixture of OC and metal.

O'Keefe J.D.* StewartS. T. Ahrens T. J. Impact on Comets and Asteroids [#2002] We characterized the impact physics in collisions on porous bodies by various density projectiles and defined different penetration modes (compression, spreading, or breakup) based on transitions between instability regimes.

Hausen K. R. * Voss M. E. Ejecta from Impact Craters in Porous Materials [#1617] Centrifuge experiments are described that simulate the formation of craters and ejecta blankets from impacts on porous asteroids. Ejecta blankets diminish as target porosity increases, consistent with observations of large craters on Mathilde.

Holsapple K. A. * On Equilibrium Shapes of Solid Solar System Bodies [#1992] Equilibrium configurations for a cohesionless elastic-plastic ellipsoidal solid body are derived using limit-load analyses. The classical results ( spheroids, Jacobi ellipsoids, limits) for fluids are included as special cases.

32nd LPSC Program 73 Hardersen P. S. * Gaffey M. J. Unraveling the Thermal Structure of the Asteroid Belt from Meteoritic and Asteroidal Evidence [#1103] The thermal structure of the main asteroid belt will be geothermally characterized by using the inferred thermal histories obtained from near infrared and radar data of main belt asteroids. The proposed heating mechanisms will then be tested with available asteroid data.

Ghosh A* Weidenschilling S. J. McSween H. Y. Jr. Thermal Consequences of the Multizone Accretion Code on the Structure of the Asteroid Belt [#1760] Using 26 AI as the heat source, we attempt to reproduce the heliocentric thermal zoning of the asteroid belt from the output of the Multizone Accretion code.

Jarvis K. S. * Vilas F. Cochran A L. Kelley M.S. New Visible-Region Spectral Observations of Vesta and Five Vestoids [#2141] New visible-region reflectance spectra were acquired of and five Vestoids. An absorption feature near 0.5065 microns has been previously identified in spectra of Vesta and some Vestoids. These observations continue the search for this feature.

Roush T. L. * Hogan R. C. Compositional Variability Associated with Stickney Crater on [#1915] Unsupervised clustering techniques identified four regions in and near Stickney crater on Phobos having unique spectral properties. These spectra are best matched by spectra of naturally occurring materials, e.g. lunar soils, meteorites, and rocks.

Shingareva T.V.* Kuzmin R. O. Downslope Movement of Surface Material on Phobos [#1453] Two types of surface material emplacement on Phobos are observed. The simulation of the large-scale landslide motion within Stickney and its triggering by sublimation-induced erosion are considered.

74 32nd LPSC Program Wednesday, March 14, 2001 DEPOSITION AND EROSION IN MARTIAN CANYONS, CHANNELS, AND OTHER TERRAINS 1:30 p.m. Room C

Chairs: M. C. Bourke E. B. Grosills

Komatsu G. * Ori G. G. di Camillo M. Garzarella A. Strom R. G. MOC Observation of Layered Deposits in Valles Marineris, Mars [#1048] Numerous fine layers identified within layered deposits in Valles Marineris using MOC images are extensive in horizontal directions and lack clear evidence of bedforms, observations best explained by depositions in quiescent aqueous environments.

Weitz C. M. * Parker T. J. Anderson F. S. Grant J. A. The Interior Layered Deposits of Valles Marineris: Layering, Erosional Processes, and Age Relationships [#1629] We have used Viking and Mars Global Surveyor data to study the interior layered deposits in detail. We have identified features which may support fluvial activity within Valles Marineris. Stratigraphic relationships indicate the deposits are younger than the wallrock.

Caruso P. A.* Schultz R. A. Slope Stability and Lithology for Interior Layered Deposits and Wallrock in Valles Marineris [#1745] We find that interior layered deposits are consistent in their strength properties with sandstone or siltstone. In contrast, wallrock slopes are consistent with layered igneous rock such as basalt with networks of columnar joints.

Lucchitta B. K. * MOC Images Confirm Layered Deposits Formed Within Valles Marineris, Mars [#1359] MOC images confirm previous research based on Mariner and Viking images: the layered deposits were emplaced inside the Valles Marineris after the troughs opened; they do not out from the walls.

LuoW.* Digital Elevation Model Resolution and Hypsometric Analysis: Implications for MOLA Gridded Topographic Data [#2043] Results indicate that the hypsometric analysis is a promising technique in quantifying landform and inferring underlying processes based on fine resolution DEMs and should be used with other morphometry analysis techniques.

Phillips R. J. * Zuber M. T. Hynek B. M. Portle K. B. Mars: Are Negative Linear Gravity Anomalies Buried Fluvial Channels? [#1176] Negative linear gravity anomalies (with no surface topographic expression) emanating from observed outflow channels in may be due to buried channels and are unlikely to be tectonic features. We explore the fluvial hypothesis.

Crown D. A. * Mest S. C. Circum-Hellas Outflow Channels: New Views from Mars Global Surveyor [#1344] Analyses of MOC images and MOLA topographic profiles constrain fluvial and mass-wasting processes involved in outflow channel formation as well as related erosional and depositional events in surrounding plains.

32nd LPSC Program------75 Bradley B. A * Sakimoto S. E. H. Relationships Between the Medusae Fossae Formation (MFF), Fluvial Channels, and the Dichotomy Boundary Southeast of Nicholson Crater, Mars [#1335] We use Mars Global Surveyor's MOLA and MOC data to investigate the Medusae Fossae Formation and its relationship to fluvial channels southeast of Nicholson Crater. In this area the MFF shows small-scale layering and is draped over Labou Vallis.

Bourke M. C. * Zimbelman J. R. The Australian Paleoflood Model for Unconfined Fluvial Deposition on Mars [#1679] Paleoflood deposits in central Australia represent a new model for possible fluvial deposits on Mars. The distinct Australian assemblage of landforms and sediments is used to identify potential unconfined paleoflood deposits in MOC images of Mars.

Hynek B. M. * Phillips R. J. Nunes D. C. Williams R. M. Wide-Scale Denudation of Western Arabia Terra [#1178] We present evidence for widespread denudation throughout western Arabia Terra, Mars, including: (1) a degraded landscape hosting numerous inliers, (2) absence of valley networks, and (3) sedimentary deposits seen in high- resolution images.

DeHonR. A Martian Sedimentary Provinces [#1361] Regional-scale, closed, topographic basins serve as sedimentary provinces in which gravity dominated process move weathered products to lower levels of the basin. The resulting accumulation of sediments on the basin floor provides a sedimentary record of the province.

Skinner J. A Jr.* Tanaka K. L. Regional Emplacement History of the Utopia and Elysium Plains Deposits, Mars [#2154] We review a new stratigraphic framework and regional emplacement history of these channelized plains deposits based on a basin-analysis approach in a GIS environment.

Grosfils E. B.* Sakimoto S. E. H. Mendelson C. V. Bleacher J. E. The Keck "Mars 2000" Project: Using Mars Orbiter Laser Altimeter Data to Assess Geological Processes and Regional Stratigraphy Near Orcus Patera and Marte Vallis on Mars [#1110] During the Keck "Mars 2000" summer project 10 undergraduates (rising juniors) used MOLA data to study a 19x14 degree region they identified as a potential Mars 2003 landing site. Here we introduce the project science and organization; please also visit the students' posters!

76 ______32nd LPSC Program Wednesday, March 14, 2001 ANGRITES, EUCRITES, AND OTHER ACHONDRITES Session dedicated to the memory of Martin Prinz 1:30 p.m. Room D

This session is dedicated to the memory of Dr. Martin Prinz, long-time head of the Department of Earth and Planetary Sciences ofthe American Museum of Natural History, New York, and cosmopolite. His contributions to science, impressive in quality as well as in quantity, cover the inorganic world from space to deep into the Earth. Marty was educated as a terrestrial petrologist and entered the extraterrestrial world with the investigation of lunar samples collected by the Apollo and Luna missions (with at the Institute of in Albuquerque, New Mexico). He produced important contributions to mare basalt, highland rocks, and KREEP basalt petrology. The expertise on lunar rocks led Marty directly into research on achondritic meteorites, of which he eventually covered the whole spectrum and enlarged the class by a few additional groups. From there it was a small step for him to dig into and silicate inclusions in iron meteorites, and eventually he also reached the chondrites. No meteorite class or group was left untouched by him; he acquired expertise for all extraterrestrial matter, a rare case in our community. En passant he invented (with Henry O. A. Meyer) the deep probes into the Earth's upper mantle: mineral inclusions in gem diamonds. All his contributions are based on keen observations of the very details, on solid and elaborate analyses, and produced insights and conclusions that were always ahead of the mainstream. It is this legacy that will stay with us and our successors, and for those who knew Marty personally, he will continue to be in their memories as a warm, pleasant, and lovely person. -GeroKurat

Chairs: G. Kurat T.J.McCoy

Mittlefehldt D. W. * Killgore M. Lee M. T. Petrology and Geochemistry of the New Angrite D'Orbigny [#2057] The title says it all.

Mikouchi T. * McKay G. Mineralogical Investigation ofD'Orbigny: A New Angrite Showing Close Affinities toAsuka 881371, Sahara 99555, and Lewis Cliff87051 [#1876] A new angrite, D'Orbigny, shows a close petrogenetic relationship to previously known angrites (LEW 87051, Asuka 881371, Sahara 99555). Probably, all crystallized from the same magma with locally different abundances of entrained olivine xenocrysts.

Floss C. * Killgore M. Crozaz G. Trace Element Compositions and Petrogenesis of the D'Orbigny Angrite [#1201] The new angrite, D'Orbigny, is texturally and mineralogically similar to other angrites with basaltic textures. Trace element data indicate a close relationship to Sahara 99555 and the Antarctic angrites LEW 87051 and Asuka 881371.

Kurat G.* Varela M. E. Brandstatter F. Wasch E. Nazarov M.A. D'Orbigny: A New Window into Angrite Genesis [#1737] This new angrite is an unusual rock, consisting of dense and porous lithologies forming a mushroom-like body rich in open druses and closed hollow shells, abundant glass and some olivinites are also present. An igneous origin is unlikely.

Burbine T. H. * McCoy T. J. Binzel R. P. Spectra ofAngrites and Possible Parent Bodies [#1857] One meteorite class where very little progress has been made in identifying possible parent bodies is the angrites. We have obtained spectra of two new angrites (D'Orbigny and Sahara 99555).

32nd LPSC Program------77 McCoy T. J. * Dickinson T. L. REE Patterns and Abundances from Sulfides in an -rich Lithology of the ALH 84008 [#1221] Variable REE patterns and abundances from co-existing sulfides in an oldhamite-rich lithology from the ALH 84008 aubrite suggest that if they formed in a common magmatic system, they experienced slightly different histories within that system.

Patzer A.* Hill D. H. Boynton W. V. Another Weird Rockfrom Space: A Unique Enstatite from the Saharan Desert [#1029] A new meteorite recovered from the Saharan desert this year is described in terms of its mineralogy and chemical composition. It is an unusual metal-rich enstatite achondrite.

Goodrich C. A.* Magmatic Inclusions in Frontier Mountain 90054 and Elephant Moraine 96328: Complex Petrogenesis of the Olivine-(Augite)-Orthopyroxene Ureilites [#1300] Compositions of melt inclusions in augite and opx in FRO 90054 support the model that FRO and Hughes 009 formed by admixture of an opx-saturated magma to an olivine-augite-liquid assemblage. Melt inclusions in opx oikocrysts in EET 96328 provide an example of such a liquid.

Singletary S. J. * Grove T. L. Goodrich C. A. Petrogenesis of Ureilite Meteorites: Evidence ofMagmatic Processes from Mineral Chemistry and Modal Mineralogy [#2000] There is a variation in mineral composition and mode that is consistent with a smelting process for part of the ureilite group, but this process cannot explain all of the variability observed among the ureilites.

Scott E. R. D. * Haack H. LoveS. G. Formation of Mesosiderites: Fragmentation and Reaccretion of a Large Differentiated Asteroid [#2060] We propose that these stony-iron meteorites formed when a 50-150 km diameter projectile disrupted a 200-400 km diameter asteroid with a molten core. Several mineralogical features of mesosiderites need reinterpreting if our model is correct.

Bogard D. D. * Garrison D. H. 39 40 Early Thermal History ofEucrites by Ar- Ar [#1138] 39 40 Ar- Ar ages for Piplia Kalan (3.58 ± 0.02 Ga) and two other eucrites indicate later impact resetting. Older 39 Ar- 40Ar ages exist for the Moama cumulate eucrite (4.42 ± 0.01 Ga) and the PCA82502 (4.506 ± 0.009 Ga) and PCA91007 non-brecciated eucrites.

Warren P. H.* Kallemeyn G. W. Eucrite Bluewing 001: A Stannem-like Bulk Composition and Its Linkage with Other Unequilibrated HED Basalts [#2114] Bluewing 001 features a moderate-high mg by eucrite standards, and yet relatively high concentrations of incompatible elements (e.g., Sm). These and literature data indicate a correlation between degree of thermal metamorphism and eucrite composition.

Misawa K. * Yamaguchi A. Zircon in Eucrites: Occurence, Possible Origin, and U-Pb Isotopic Systematics [#1676] We will present occurence and U-Pb age of zircon in eucrites, and discuss possible origin of these zircons.

78 ______32nd LPSC Program Wednesday, March 14, 2001 NASA PROGRAM MANAGERS' BRIEFING 5:00 p.m. Room C

Chair: J. M. Boyce

32nd LPSC Program 79 Thursday, March 15, 2001 ASTROBIOLOGY I: THINKING BIG TO THE NITTY GRITTY 8:30 a.m. Room A

Chairs: A. H. Treiman J.A.Nuth

Nuth J. A. III* Hill H. G. M. Simultaneous Production of Reduced Nitrogen Compounds and Hydrocarbons Using Amorphous Iron Silicate Smokes as a Catalyst [#2061] Amorphous iron silicates efficiently catalyze formation of hydrocarbons and ammonia under conditions similar to that found in the solar nebula. Preliminary data and rates will be discussed, and much further experimentation is required.

Mendez A.* Planetary Habitable Zones: The Spatial Distribution of Life on Planetary Bodies [#2001] In this work a model is presented to explain the spatial distribution of life on Earth and its potential distribution on other planetary bodies.

Melosh H. J. * Exchange ofMeteoritic Material Between Stellar Systems [#2022] Can meteorites travel to nearby stellar systems? Monte Carlo simulations of ejection from the solar system and capture by a giant planet in the target system indicate that about a dozen meteorites from our solar system are captured by another stellar system every 100 Myr.

Steele A.* Toporski J. K. W. Avci R. Agee C. McKay D. S. Investigations into the Contamination of Lunar Return Material. Part 1. Surface Analysis and Imaging Investigations [#1674] A suite of lunar soils has been investigated by imaging and in-situ spectroscopy technqiues. A suite of contaminant plastics and potential microbes has been found.

Thomas-Keprta K. L. * Clemett S. J. Bazylinski D. A. Kirschvink J. L. McKay D. S. Wentworth S. J. Vali H. Gibson E. K. Truncated Hexa-Octahedral Magnetites: Biosignatures in Terrestrial Samples and Martian Meteorite ALH84001 [#2017] We suggest that the observation of truncated hexa-octahedral magnetites in ALH84001 are both consistent with, and in the absence of terrestrial inorganic analogs, likely formed by biogenic processes.

Friedmann E. I.* Wierzchos J. Ascaso C. Winklhofer M. Chains of Magnetite Crystals in the Meteorite ALH84001: Evidence of Biological Origin [#1996] The presence of magnetite crystal chains, missing evidence for their biological origin, as well as five morphological characteristics incompatible with a nonbiological origin are demonstrated by high-power stereo backscattered scanning electron microscopy.

Treiman A. H. * A Hypothesis for the Abiotic and Non-Martian Origins of Putative Signs ofAncient Martian Life in ALH84001 [#1304] Putative evidence of martian life in ALH84001 can be explained by abiotic and non-martian processes consistent with the meteorite's geological history.

80 ______32nd LPSC Program Greenwood J.P. * Mojzsis S. J. Coath C. D. Development ofthe Sulfur Isotope Biomarker for Mars Sample Return: Results from Los Angeles, Nakhla, and ALH8400I [#1734] 32S, 33S, and 34S measurements of sulfides in the martian meteorites Los Angeles, Nakhla, and ALH84001 will be presented. Two pyrite grains in ALH8400 1 have 833S anomalies. The data do not support evidence of biological activity.

Matrajt G. * Maurette M. Blanot D. Ferrihydrite in : A Potential Adsorbent ofAmino Acids and Catalyst of Oligopeptide Formation [#1037] Ferrihydrite, a very abundant phase in micrometeorites, is a potential adsorbent of amino acids, particularly the proteic ones, and a good catalyst allowing the formation of small peptides.

Wang A. * Haskin L. A. Kuebler K. E. Jolliff B. L. Walsh M. M. Raman Spectroscopic Detection of Graphitic Carbon of Biogenic Parentage in an Ancient South African Chert [#1423] The detection of reduced carbon in martian rocks and soils is important in the search for evidence of life. A Raman spectroscopic study of South Africa chert reveals that 50 ppm carbon or less can be determined by this technique.

Toporski J. K. W. * Steele A. Westall F. Avci R. McKay D. S. The Combined Detection of Morphological and Molecular Biomarkers: Implicationsfor Astrobiology [#1667] We have investigated known bacterial fossils using a combination of morphological and spectral techniques for the detection of biomarkers. This approach is considered crucial to unambiguous life detection strategies within Astrobiology.

Beard B. L. * Johnson C. M. Skulan J. Taylor L. A. Sun H. Cox L. Nealson K. H. Sinha M.P. Gerdenich M. J. The Fe-Isotope System and Its Applicability as a Biosignature [#1831] High precision (0.05%o) Fe isotope analyses show that igneous rocks and loess are invariant but chemical sediments have variable compositions. The relative roles of abiologic and biologic fractionations that produced this range are discussed.

Kminek G. * Bada J. L. The Effect of Sterilizing Gamma Radiation on Amino Acids [#1918] Our investigation shows that gamma radiation can be used to sterilize samples returned from Mars without destroying important information about organic molecules that might be in the sample.

32nd LPSC Program------81 Thursday, March 15, 2001 MOON: NEW VIEWS OF COMPOSITION AND MATURITY 8:30 a.m. Room B

Chairs: D. B. J. Bussey L. P. Keller

Jolliff B. L. * Korotev R. L. McCallum I. S. Global Context for Lunar Nonmare Rock Types: Sample and Remote-Sensing Perspectives [#1829] Nonmare rock types known from lunar sample studies are placed in a global context using results from recent remote-sensing missions and constraints based on sample studies, including thermobarometric, geochemical, and isotopic data.

Wieczorek M. A. * Zuber M. T. The Composition of the Lunar Crust: Constraints from Central Peaks and Crustal Thickness Modeling [#1410] We correlate lunar central peak compositions with a dual-layered crustal thickness model. The peak compositions are found to be consistent with the crust being stratified, and we constrain the composition of these crustal layers.

Lawrence D. J. * Feldman W. C. Blewett D. T. Elphic R. C. Lucey P. G. Maurice S. Prettyman T. H. Binder A. B. Iron Abundances on the Lunar Surface as Measured by the Lunar Prospector Gamma-Ray Spectrometer [#1830] Here we present the first quantitative estimates of global iron abundances from Lunar Prospector Gamma-Ray Spectrometer (LP-GRS) data and make comparisons to iron abundances derived from Clementine Spectral Reflectance data.

Prettyman T. H.* Feldman W. C. Lawrence D. J. Elphic R. C. Gasnault O. Maurice S. Moore K. R. Binder A. B. Distribution of I ron and Titanium on the Lunar Surface from Lunar Prospector Gamma-Ray Spectra [#2122] Relative abundances of iron and titanium on the lunar surface have been measured using Lunar Prospector gamma- ray data. These are the first LP-GRS results presented with spectral deconvolved data.

Elphic R. C.* Lawrence D. J. Maurice S. Feldman W. C. Barraclough B. L. Gasnault O. M. Binder A B. Lucey P. G. Blewett D. T. Lunar Prospector Neutron Measurements and Lunar Ti02 [#1487] Lunar Prospector neutron spectrometer data suggest lower Ti02 abundances than have previously been suggested.

Gillis J. J. * Jolliff B. L. Elphic R. C. Maurice S. Feldman W. C. Lawrence D. J. A Hybrid Method for Calculating Ti02 Concentrations Using Clementine UVVIS Data, and Verified with Lunar Prospector Neutron Spectrometer Data [#2185] We present a new algorithm for extracting Ti02 concentrations from Clementine UVVIS data, which accounts for soil darkness and UV/VIS ratio. The accuracy of these Ti02 estimates are examined with Lunar Prospector thermal/epithermal neutron flux data.

Maurice S. * Feldman W. C. Lawrence D. J. Elphic R. C. Johnson J. R. Chevrel S. Genetay I. Binder A. B. A Maturity Parameter of the Lunar Regolith from Neutron Data [#2033] Here we introduce a new index of maturity at remote sensing scale from epithermal neutron measurements by the Lunar Prospector Neutron Spectrometer.

82 ______32nd LPSC Program Le Mouelic S. * Langevin Y. Lucey P. G. Systematic Spectral Relationships Linked to Maturity and Composition: Toward a New Iron Mapping Technique [#1096] We use Clementine UVVIS and NIR data to investigate systematic relationships between spectral parameters around small fresh craters in area. Implications for a new iron mapping technique are discussed.

Keller L. P. * Clemett S. J. Formation ofNanophase Iron in the Lunar Regolith [#2097] 2 We are using a TEM technique to measure Fe metal!Fe + ratios in space weathered lunar soils to determine the efficiency of nanophase metal production in the lunar regolith.

Basu A. * Wentworth S. J. McKay D. S. Occurrence and Distribution ofFe 0 -Globules in Lunar Agglutinates [#1942] High-resolution BSE imaging of agglutinitic glass shows immiscible metallic Fe0 globules (>99% are <1 f.J.m; >50% are <50 nm) in agglutinitic melt defining flow-lines, occurring in clusters, and rimming clasts(- 5%).

Feldman W. C. * Maurice S. Lawrence D. J. LittleR. C. Lawson S. L. Gasnault O. Wiens R. C. Barraclough B. L. Elphic R. C. Prettyman T. H. Steinberg J. T. Binder A. B. Evidence for Water Ice near the Lunar Poles [#1844] A reanalysis of Lunar Prospector neutron data near both lunar poles shows that the enhanced [H] there is not consistent with a reduced diffusion rate. Instead, a reduced sublimation rate seems to be required, which then implies the presence of H20.

Crider D. H. * Vondrak R. R. Space Weathering Effects on Lunar Cold Traps [#1922] We investigate the effects of space weathering on the stability of deposits of volatiles at the lunar cold traps.

Foldi T. Berczi Sz. * Palasti E. Water and Bacteria Transport Via Electrostatic Coagulation and Their Accumulation at the Poles on a Dusty Planet [#1059] Agglutination of electrostatically charged dust particles may produce grains which attract H20 molecules (or bacteria) on dusty planetary surfaces. These particles are dragged by the solar radiation pressure toward the poles where they accumulate.

32nd LPSC Program------83 Thursday, March 15, 2001 MARS: SUBSURFACE ICE TO SURFACE HISTORY 8:30a.m. Room C

Chairs: N. G. Barlow J.M.Dohm

Hagerty J. J. * Newsom H. E. New Evidence for Impact-induced Hydrothermal Alteration at the Lemar Crater, India: Implications for the Effect of Small Craters on the Mineralogical and Chemical Composition of the Martian Regolith [#1131] The Lonar crater has several unique characteristics that make it a valid analogue for similar craters on Mars. We have characterized the secondary alteration assemblage at Lonar in order to make implications for martian alteration materials.

Newsom H. E. * Central Remnant Craters on Mars- Localization of Hydrothermal Alteration at the Edge of Crater Floors? [#1402] Localized erosion at the edge of crater floors may be caused by hydrothermal alteration due to focusing of fluid flow around an impact melt sheet following crater formation, coupled with hydrothermal self-sealing under the center of the crater.

Barlow N. G. * Ejecta Mobility Results for Impact Craters in the Northern Hemisphere ofMars [#1606] We present results on how ejecta extent, measured by a parameter called ejecta mobility, varies with latitude, terrain, and ejecta morphology for impact craters with layered ejecta structures located in the northern hemisphere of Mars.

Mustard J. F. * Recent Ground Ice on Mars and Implications for Volatiles and Surface Processes [#1988] A terrain interpreted to be ice-cemented soil has been mapped. The formation and removal of this terrain has affected the distribution of volatiles (e.g. water) and contributed to the formation lineated valley fill and lobate debris aprons.

Turtle E. P. * Pathare A. V. Hartmann W. K. Esquerdo G. Investigating Creep of Ground Ice as a Cause of Crater Relaxation in Martian High-Latitude Softened Terrain [#2044] We incorporated recent rheologic data for ice/dust mixtures into finite-element models to investigate the conditions under which viscous creep of martian ground ice can occur to create the modified craters observed in the "softened terrain" on Mars.

Travis B. J. * Rosenberg N.D. Cuzzi J. N. Geothermal Heating, Convective Flow and Ice Thickness on Mars [#1390] Our 3D calculations suggest that hydrothermal circulation may occur in the martian regolith and may significantly thin the surface ice layer on Mars at some locations due to the upwelling of warm convecting fluids driven solely by background geothermal heating.

Dohm J. M. * Ferris J. C. Anderson R. C. Baker V. R. Hare T. M. Barlow N. G. StromR. G. Tanaka K. L. Scott D. H. Paleotopographic Reconstruction of the Tharsis Magmatic Complex Reveals Potential Ancient Drainage Basin/Aquifer System [#1870] Paleotopographic reconstructions reveal the potential existence of an enormous Noachian drainage basin in the eastern part of the Tharsis region of significant geologic and paleohydrologic implications.

84 ______32ndLPSCProgram Grant J. A.* Parker T. J. The History of Water Discharge in the Margaritifer Sinus Region of Mars [#1224] Uzboi-Holden-Ladon-Margaritifer Valles and Samara and Parana-Loire Valles discharge into Margaritifer Basin during late-Noachian/early-Hesperian caused pending, infiltration, and storage. Early-to-mid Hesperian release formed Margaritifer Chaos and Ares Valles.

Abe Y. * Numaguchi A. Water Circulation on a Land-Planet: An Implication for Paleo-Mars [#1551] Precipitation distribution on a Mars-like land planet are investigated using a general circulation model. The low latitude area is kept humid only when the planet has large spin-axis inclination and warm climate. Otherwise it is likely dried out.

Jakosky B. M. * Phillips R. J. Mars Volatile and Climate Evolution: Water the Real Constraints? [#1147] Our goal is to examine all of the observations pertinent to martian climate, determine which are the key constraints, and understand what scenarios might be consistent with them.

Ivanov B. A. * Mars/Moon Cratering Rate Ratio Estimates [#1249] One of the possible ways is presented to transfer the lunar production function (the frequency of impacts with a given size of a formed crater) to Mars. The model time scale for Mars crater chronology is derived.

Hartmann W. K. * Martian Upland History: Inconsistencies and Constraints [#1794] ALH 84001 and age distribution of Mars meteorites constrain geological character of martian uplands as loosely consolidated sediments. A reservoir of 4.5 Gy crust exists with near-surface exposures in some regions. A synthesis of Neukum/Hartmann age data is given.

Plaut J. J. * Counting Craters on MOC Images: Production Functions and Other Complications [#2171] New crater counts on MOC images and associated Viking Orbiter images are used to address the issue of the crater production function at Mars, and to infer aspects of resurfacing processes.

32nd LPSC Program------85 Thursday, March 15, 2001 PLANETARY FORMATION AND EARLY EVOLUTION II 8:30 a.m. Room D

Chairs: T. Rushmer J. W.Morgan

Walker R. J. * Horan M. F. Morgan J. W. Meisel T. Osmium Isotopic Compositions of Chondrites and Earth's Primitive Upper Mantle: Constraints on the l..nte Veneer [#1152] The 1870s/1880s of carbonaceous chondrites averages approximately 2% lower than for enstatite and ordinary chondrites. The primitive upper mantle ratio for the Earth best matches that of ordinary and enstatite chondrites.

Horan M. F. * Walker R. J. Rubin A. E. Highly Siderophile Elements in Shocked and Unshocked Chondrites [#1577] High precision abundances ofRe, Os, Pt, Ir, Ru, and Pd are combined with Re-Os isotopic data to demonstrate that HSE provide a distinctive fingerprint for each of the chondrite groups.

Morgan J. W. * Walker R. J. Brandon A. D. Horan M. F. I...nte Influx: Evidence from Siderophile Elements in Terrestrial Peridotites and Lunar Breccias [#1793] In terrestrial peridotites, Pd is sometimes enhanced relative to other PGE. This observation is taken to imply a "non- chondritic" HSE signature in the mantle. A similar pattern is seen in some Apollo 17 breccias suggesting it to be a primordial feature of late influx.

Schmitt H. H. * Moon's Chondritic Mantle Suggests Delayed Core Formation in the Earth and Other Terrestria Planets [#1136] Initially cool chondritic cores within the terrestrial planets would have delayed metallic core formation by delaying the downward migration of metallic liquid.

Ertel W. * Walter M. J. P. J. Drake M. J. Experimentally Determined Solubilities of Pt up to 90 Kbars and 1850°C [#1011] PGEs are indicators of planetary differentiation processes based on their siderophility. Results of our HP experiments (5 to 90 kbar; 1400 to 1850°C) indicate that P does not influence the Pt partitioning, supporting the late veneer hypothesis.

Chabot N. L. * Agee C. B. The Effect of Core-Mantle Differentiation on V, Cr, and Mn: Experimental Metal/Silicate Partitioning Results [#1686] The abundances of V, Cr, and Mn are similarly depleted in the Earth and Moon. We present metal/silicate partitioning results which examine if the depletions can be explained by a core formation event.

Righter K. * Rhenium and Iridium Partitioning in Silicate and Magmatic Spinels: Implications for Planetary Magmatism and Mantles [#1759] Highly siderophile elements Re, Ru and Ir partition strongly into spinel structures with large octahedral sites. New experimental results for both magmatic and silicate spinels will be presented with a few planetary implications.

McDonough W. F. * The Composition ofthe Earth's Core [#2005] Overall, the Earth has a volatile depletion pattern similar to that seen in chondrites and an Fe/AI value of -20.

86 ______32nd LPSC Program Rushmer T. * Gaetani G. Jones J. H. Sparks J. Chondrites Under Stress: Physical Processes and Geochemical Signatures at Slow Experimental Strain Rates [#1066] We have experimentally investigated metal segregation at slow strain rates. Liquid metal pore pressure remains high during deformation and migration is by fracture. Within a crystalline mush silicate melt may migrate preferentially to metallic liquid.

Sanloup C.* F. Gillet P. Fei Y. Physical Properties of Liquid Fe Alloys at High Pressure and Their Bearings on the Nature of Metallic Planetary Cores: Implications for the Earth, Mars and the Galilean Satellites [#1877] Physical properties of liquid Fe alloys under pressure are measured by synchrotron X-ray techniques. S strongly modifies the structure and compressibility of liquid Fe in contrast to Si, arguing for a low S content in the Earth's core and a solid martian core.

Senshu H. * Matsui T. Kuramoto K. Effect of Isobaric Core Size on Early Thermal History of Mars [#1558] We have developed numerical early thermal history model of accreting Mars. We will report parameter dependency of final structure of accreting Mars, especially on the size of isobaric core. We will also report the following evolution of the interior of Mars.

MartinP. * Vocadlo L. Price G. D. First Principles Simulations of Iron Sulphide (FeS) Polymorphs and the Martian Interior [#1303] Ab initio calculations have been used to investigate the relative stabilities and equations of state of FeS polymorphs. Values for the bulk modulus and its first and second derivatives with respect to pressure have been obtained for each polymorph.

32nd LPSC Program------87 Thursday, March 15, 2001 SPECIAL SESSION EUROPA SURFACE-SUBSURFACE MATERIAL INTERCHANGE, BURIAL, AND RESURFACING PROCESS 1:30 p.m. Room A

Chairs: J.D. Rummel C.F.Chyba

McKinnon W. B.* Shock E. L. Ocean Kanna: What Goes Around Comes Around on Europa (Or Does It?) [#2181] Europa interchange of matter and energy are introduced, with particular emphasis on the mantle-ocean interface and the possibility of convection within the ice shell.

Pappalardo R. T. * Head J. W. III The Thick-Shell Model of Europa's Geology: Implications for Crustal Processes [#1866] The gamut of Europa's endogenic surface features can be accounted for by tidal deformation coupled with the buoyant rise and partial melting of warm ice within a relatively thick (nominally -20 to 30 krn) icy shell above a liquid water ocean.

Greenberg R. * Geissler P. O'Brien D.P. Hoppa G. V. Tufts B. R. Ocean-to-Surface Linkages Resurface Europa: An Invited Review [#1428] The processes that resurface Europa each include regular transport and/or frequent exposure of oceanic water through the crust to the surface, providing extensive surface-subsurface material interchange.

Spohn T. * Husmann H. Estimates of Europa Suiface Heat Flow from Tidal Dissipation and Interior Structure Models [#2166] Models of interior structure and tidal dissipation will be compared and discussed with emphasis on their prediction of surface heat flow.

Zahnle K. J. * Cratering Rates on Europa [#1699] We use numerical simulations of the orbital evolution of comets and the observed history of close encounters with Jupiter to estimate the rate comets crater Europa.

McCord T. B. * Orlando T. M. Teeter G. Hansen G. B. Hibbitts C. A. Simulation of Exposure of Brines to Europa's Surface [#1252] Flash-frozen brines created under simulated Europa surface conditions to simulate exposure of ocean water. These brines show spectral features most similar to Europa hydrated material.

Phillips C. B. * Chyba C. F. Impact Gardening Rates on Europa: Comparison with Sputtering [#2111] Impact gardening and sputtering are competing processes in the creation, destruction, and preservation of interesting biogenic materials on Europa. We estimate a new gardening rate, and compare it to current estimates of gardening and sputtering.

Prockter L. M. * Creation and Destruction of Lithosphere on Europa: From Bands to Folds [#1452] The recent discovery of compressional features on Europa suggests a model of lithospheric cycling, in which band formation results in compression and folding. Subsequent isostatic relaxation of folds may cycle material back into Europa's interior.

Thomson R. E.* Delaney J. R. Evidence for a Weakly Stratified Europan Ocean Sustained by Seafloor Heat Flux [#1347] Chaos-type features on the surface of Europa are interpreted as melt-through structures formed by rotationally confined oceanic plumes that rise to the base of the ice shell from magmatically heated regions of the seafloor.

88 ______32nd LPSC Program Chyba C. F. * Phillips C. B. Surface-Subsurface Exchange and the Prospects for Life on Europa [#2140] Sources of chemical energy for speculative ecologies on Jupiter's moon Europa are difficult to identify, but disequilibrium radiation chemistry in Europa's upper ice layer could power an oceanic ecosystem provided that the upper layer communicates with the ocean.

Blankenship D. D. * Subsurface Evaluation of Europan Ice-Ocean Interchange Processes, Using an Orbiting Ice Penetrating Radar [#1854] Practical europan ice-ocean interchange models imply that mapping of the deepest radar interface and classification of volume scattering would well characterize any brittle ice layer and could be used to test directly these crustal formation hypotheses.

Johnson T.V.* Europa Orbiter Exploration Strategies [#1388] The Europa Orbiter mission is planned as the next stage of Europa exploration. Its primary goals are to search for definitive evidence of a subsurface ocean, to characterize the ice crust and ice/water interface, and to prepare for future surface/sub-surface missions.

Stevenson D. J. * Transport of Brine to the Near Surface or Surface of Europa: Some General Considerations [#1747] Fluids at or near the surface of Europa could arise from melting within the ice and need not require direct transport from an ocean to the surface. Thin ice is not necessary.

MeyerM. A.* Europa Surface-Subsurface Material Interchange: Astrobiology Implications of the Session [#1940] This paper will seek to identify key parameters, and critical measurements needed to determine exchange rates of surface-subsurface materials of Europa and to anticipate their implications for the astrobiological studies NASA will plan.

32nd LPSC Program------89 Thursday, March 15,2001 MOON: REMOTE SENSING PERSPECTIVES 1:30 p.m. Room B

Chairs: S. Tompkins B. L. Jolliff

Tompkins S. * Hawke B. R. Distribution of Materials at Tycho Crater [#1206] A variety of remote sensing data (Clementine, Lunar Prospector, Lunar Orbiter, and radar-derived elevation maps) are used to evaluate the composition of surface materials at Tycho Crater.

Sunshine J. M. * Tompkins S. Yet Another New Look at Copernicus: Projecting Telescopic Spectra onto Clementine Multispectral/mages Through Spectral Mixture Analysis [#1324] Using 0.7-2.5 {lm spectra calculated at 100m resolution, we are able to produce true band depth and position maps and thus more accurately map the distribution of impact melt, mare basalt, ejecta, and olivine at Copernicus.

Li L. * Mustard J. F. Improved Mapping of the Lunar Surface Using a Multiple Endmember Mixture Model [#2052] An improved approach for lunar surface mapping is proposed and tested in Serenitatis/Tranquilitatis region, and the procedure results in the mapping of more endmembers with high accuracy than traditional spectral mixture modeling does.

Rajmon D.* Spudis P. Distribution and Stratigraphy of Basaltic Units in [#2156] Mosaics of Clementine images and FeO and Ti02 were used to map different basalt units in M. Tranquillitatis. 4 to 5 units with different Ti02 content were identified.

Spudis P. D.* Baloga S.M. Mixing of the Mare Regolith: A Clementine Test [#1343] We have used Clementine images to estimate the amounts of highland contamination in mare regoliths on the Moon. These results will be compared to predictions of highland debris derived from Monte Carlo models of regolith growth.

Gaddis L. * Staid M. Petro N. Compositions of Lunar Pyroclastic Deposits [#1372] The 5-band Clementine UVVIS data were used to characterize the compositions of 75 large and small lunar pyroclastic deposits, and these were compared to compositions of major lunar maria and highland terrains.

Hawke B. R. * Lucey P. G. Smith G. A. Taylor G. J. Lawrence D. J. Spudis P. D. Remote Sensing Studies of Selected Spectral Anomalies on the Moon [#1241] It has been suggested that lunar Red Spots were produced by highlands volcanism and that they may be composed of KREEP basalt or even more evolved highlands lithologies. We have remote sensing data to investigate the composition of selected Red Spots.

Staid M. I. * Pieters C. M. The Compositional Diversity of Farside Basalts from Clementine Multispectral/mages [#1436] The composition of near and farside lunar basalts are compared using multispectral images obtained by the Clementine spacecraft. Uncontaminated basalts are identified within fourteen mare deposits to examine the distribution of compositional types.

90 ______32nd LPSC Program Lucey P. G. Blewett D. T. J. * Hawke B. R. Is the Interior of South Pole-Aitken Basin Spectrally Similar to Apollo I4? [#1761] Both (Apollo 14 region) and SPA are examples of high-iron highlands, therefore the Apollo 14 samples may help to understand the composition of SPA. The Clementine UVVIS spectral properties of SPA show both similarities and differences with Fra Mauro.

Pieters C. M. * Head J. W. III Gaddis L. Jolliff B. Duke M. The Character and Possible Origin of "Olivine Hill" in South Pole-Aitken Basin [#1810] A hill with abundant olivine in central SPA may represent an exposure of upper mantle materiaL A new appproach to mapping rock types allows spatial relations of diverse materials to be evaluated in geologic context.

Steutel D. * Lucey P. G. Mid-Infrared Multispectral Imaging of the Moon [#1975] Using ground-based two-band mid-infrared multispectral iJllaging of the Moon, we have tentatively identified 3 cases (, Copernicus, and ) where spectral anomalies are consistent with the presence of coarse- grained (>75 p.m) olivine.

Nelson R. M. * Smythe W. D. Hapke B. W. Hale A. S. Piatek J. A. Scattering Properties of Candidate Planetary Regolith Materials [#1405] The laboratory investigation of the scattering properties of candidate planetary regolith materials is an important technique for understanding the physical properties of a planetary regolith.

Kreslavsky M.A.* Shkuratov Yu. G. Kaydash V. G. Omelchenko V. V. Blewett D. T. Lucey P. G. Lunar Opposition Spike Observed by Clementine NIR Camera: Preliminary Results [#1140] We processed Clementine near-infrared camera images ofthe zero-phase point to study the amplitude of the opposition spike at NIR wavelengths. The results are consistent with the coherent-backscatter mechanism.

32nd LPSC Program------91 Thursday, March 15, 2001 MARTIAN SOIL CHEMISTRY AND MINERALOGY 1:30 p.m. Room C

Chairs: M. E. Minitti C. D. Cooper

Foley C. N. * Economou T. E. Clayton R.N. Chemistry of Mars Pathfinder Samples Determined by the APXS [#1979] A flight duplicate has been used to further calibrate the APXS under martian conditions in order to quantify the Pathfinder abundances. We report new abundances for the Pathfinder samples and possible evidence for water in some samples.

Bruckner J. * Dreibus G. Rieder R. Wanke H. Revised Data of the Mars Pathfinder Alpha X-Ray Spectrometer: Geochemical Behavior of Major and Minor Elements [#1293] The analysis of the Alpha Proton X-ray Spectrometer of the Mars Pathfinder Mission is revised by a more accurate recalibration. Compared to previous results the Fe concentration of all samples rose by about 25%, while the Si fell by about 10%.

Hoefen T. M. * Clark R.N. Compositional Variability of Martian Olivines Using Mars Global Surveyor Thermal Emission Spectra [#2049] Data from the Mars Global Surveyor Thermal Emission Spectrometer have spectral features in the 16 to 50 micron wavelength region correlating to bands in olivines. Using laboratory spectra, outcrops of olivine were mapped in the TES data, on the basis of their FeO content.

Hamilton V. E.* Christensen P.R. McSween H. Y. Jr. Clark R.N. Hoefen T. M. Spectral Variations in MGS TES Data of Nili Fossae: A Possible Source Region for SNC Meteorites on Mars? [#2184] As part of ongoing studies of TES data and global searches for the source regions of SNC meteorites, we have identified a potential source region for the martian meteorites ALH77005 and in ~he Nili Fossae region of northeastern Syrtis Major.

Wyatt M. B.* Bandfield J. L. McSween H. Y. Jr. Christensen P.R. Compositions of Low Albedo Intracrater Materials and Wind Streaks on Mars: Examination of MGS TES Data in Western Arabia Terra [#1872] Basalt and andesite surface compositions are identified within individual low albedo intracrater features and adjacent dark wind streaks. High resolution mapping of compositional heterogeneities may help constrain origin hypotheses for these features.

Cooper C. D. * Mustard J. F. TES Observations of the Global Distribution of Sulfate on Mars [#2048] A global set of TES spectra was deconvolved using endmembers including a laboratory cemented sulfate soil. Good matches are found to the cemented sulfate and appear to represent detection of spatially-coherent regions of cemented sulfates on Mars.

Cloutis E. A. * Krenn K. M. Kollar S. Strong J. Reflectance Spectra of Iron-bearing Sulphates: Implications for Mars [#1375] Reflectance spectra of a number of different iron-bearing sulphates show a diversity of spectral properties, most noticeably the lack of a 0.43 p.m absorption feature in some cases. Consequently some of these minerals are spectrally consistent with martian surface spectra.

92 ______32nd LPSC Program Blaney D. L. * The 4.5 p.m Sulfate Absorption Feature on Mars and Its Relationship to Formation Environment [#1919] The 4.5 p.m sulfate absorption feature on Mars is spatially variable. It is a sensitive composition and hydration state and can be used to identify different types of aqueous environments.

Kirkland L. E.* Herr K. C. Salisbury J. W. McAfee J. M. Forney P. B. Determining TES Detection Limits for Minerals [#1864] We will examine mineral detection limits for the Mars Global Surveyor TES, and what the results indicate for remote sensing studies of Mars.

Minitti M. E.* Rutherford M. J. Weitz C. M. Spectra ofMartian Andesitic Materials [#1976] The Mars Pathfinder and Mars Global Surveyor missions both detected andesitic compositions on the martian surface. We have investigated the spectral properties ofunoxidized and oxidized martian andesitic samples crystallized with and without water.

Johnson J. R. * Harz F. Christensen P. Lucey P. G. Thermal Infrared Spectroscopy of Experimentally Shocked Anorthosite and Pyroxenite [#1195] We performed shock recovery experiments at JSC (17-63 GPa) on samples of Stillwater pyroxenite and anorthosite and acquired their thermal infrared spectra (3-50 p.m) to investigate the degradation of spectral features at high pressures.

Morris R. V. * Lofgren G. E. Le L. Shelfer T. D. Crystallization of Oxide and Silicate Phases from Impact Melts with Average Martian Soil Composition [#2012] Crystallization of melts formed from impact into martian soil in a C02 atmosphere might contribute magnetite, pyroxene, and minor feldspar to the martian surface. The strongly magnetic nature of martian soil might be a manifestation of this process.

Bullock M.A.* Moore J. M. Mellon M. T. Aqueous Alteration of Mars-Analog Rocks Under an Acidic Atmosphere [#2026] The wind-blown fines of Mars have high amounts of salts that are easily mobilized by water. We report on laboratory experiments that produce brines from the interaction of water with Mars-analog rocks and a simulated acidic Mars paleoatmosphere.

32nd LPSC Program------93 Thursday, March 15, 2001 COSMIC DUST 1:30 p.m. Room D

Chairs: C. Engrand M.J.Genge

Stadermann F. J. * Hydrogen, Carbon, and Nitrogen Isotopic Imaging of Sub-Micron Components from Interplanetary Dust Particles [#1792] The new Washington University NanoSIMS is used for the study of the internal H, C, and N isotopic compositions of 7 chondritic IDPs. The most interesting result is the discovery of a discrete, 400 nm sub-grain with a 15N enrichment of +813%o.

Dai Z. R. Joswiak D. J. Bradley J. P. * Brownlee D. E. Hill H. G. M. Nano-Diamonds in Chondritic Interplanetary Dust Particles [#1631] In-situ acid etching of ultramicrotomed thin sections has lead to the identification of nano-diamonds in interplanetary dust particles.

Flynn G. J. * Feser M. Keller L. P. Jacobsen C. Wirick S. Avakians S. Carbon-XANES and Oxygen-XANES Measurements on Interplanetary Dust Particles: A Preliminary Measurement of the C to O Ratio in the Organic Matter in a Cluster IDP [#1603] C-XANES and 0-XANES measurements on L2011 *B2, a cluster fragment, demonstrate that the carbon-rich phase contains oxygen that is double-bonded to carbon, confirming this material is organic, and we preliminarily estimate the C:O ratio as -2:1.

Brownlee D. E.* Joswiak D. J. Bradley J. Kress M. Pepin R. Schlutter D. PalmaR. Carbonaceous Meteor Ash- A Significant Carrier of Carbon, Organic Material and Noble Gas to the Surfaces of Terrestrial Planets? [#2170] Meteor ash - a significant carrier of carbon, noble gas and organic matter to terrestrial planet surfaces.

Palma R. L. Schlutter D. J. Pepin R. O. * Brownlee D. E. Joswiak D. O. Helium and in Carbon-rich Phases of Interplanetary Dust Particles [#2074] IDPs showing evidence of heating to high temperature nevertheless retained large amounts of He in highly refractory, probably carbonaceous sites. Carbon is also a major He and Ne carrier in a particle not strongly heated on entry.

Moister F. J. * Bradley J.P. Sitko M. L. Nuth J. A. Astra-Mineralogy: The Comparison of Infrared Spectra from Astrophysical Environments with those from Interplanetary Dust Particles (IDPs) [#1391] The infrared spectral properties of interplanetary dust particles are directly compared with those of astronomical dust in several astrophysical environments as measured by the Infrared Space Observatory (ISO).

Toppani A. * Libourel G. Conditions ofAtmospheric Entry of Micrometeorites [#1520] Owing to an experimental study designed to simulate the atmospheric entry of micrometeorites, it is possible to reproduce their main types and to better constrain their entry conditions, such as degree of heating, altitude of deceleration and entry angle.

Genge M. J. * Bradley J.P. Engrand C. Gounelle M. R. P. Grady M. M. The Petrology of Fine-grained Micrometeorites: Evidence for the Diversity of Primitive Asteroids [#1546] We report the discovery by analytical TEM of serpentine and phases interpreted as dehydroxylates of serpentine in ultramicrotomed sections of a number of fine-grained Antarctic micrometeorites.

94 ______32nd LPSC Program Noguchi T. * Nakamura T. Mineralogy of Phyllosilicate-rich Micrometeorites and Comparison with Tagish Lake CI and Sayama CM Chondrites [#1541] We investigated CI-like and CM-like MMs, and compared them with Tagish Lake and Sayama. CI-like MMs were probably derived from parent bodies those have affinity with the parent body of Tagish Lake. There is no direct relationship between a CM-like MM and CM chondrite.

Matrajt G.* Flynn G. J. Bradley J. Maurette M. FTIR and STXM Detection of Organic Carbon in Scoriaceous-type Antarctic Micrometeorites [#1336] Organic carbon has been detected in a scoriaceous-type Antarctic using FriR and STXM analytical techniques.

Alexander C. M. O'D. * LoveS. Atmospheric Entry Heating of Micrometeorites Revisited: Higher Temperatures and Potential Biases [#1935] The atmospheric entry heating model of Love and Brownlee appears to have overestimated evaporation rates by as much as two orders of magnitude. Here we revisit the issue of atmospheric entry heating, using a revised prescription for evaporation rates.

Alexander C. M. O'D. TaylorS. * Delaney J. MaP. Herzog G. F. Mass-dependent Fractionation of Mg,. Si, and Fe Isotopes in Five Stony Cosmic Spherules [#1194] We found mass dependent fractionation, and hence evidence of evaporation, in five stony cosmic spherules. We selected light colored, iron-poor spherules for analysis. Iron was fractionated in all five spherules, Si in three and Mg in one spherule.

Al-Badri Z. * Keller L. P. Grier D. G. McCarthy G. J. Chauhan B. P. S. Boudjouk P. Synthesis and Characterization of Nanocomposite Analogs of Interstellar Amorphous Silicates [#1941] Synthetic analog materials consisting of nanophase Fe metal in a silica glass matrix have been prepared. The infrared properties of the analog materials show remarkable similarities to amorphous interstellar silicates.

32nd LPSC Program------95 Thursday, March 15, 2001 PANEL DISCUSSION: SOCIETAL CONNECTIONS OF PLANETARY EXPLORATION AND THE SEARCH FOR LIFE ELSEWHERE 5:15 p.m. Room A

Moderator: Jakosky, University of Colorado

Matthew Golombek, Jet Propulsion Laboratory The Influence of Science on Society

Bruce Jakosky, University of Colorado Exploration, Education, and Society

G. Jeffrey Taylor, University ofHawai'i Sharing our Discoveries

Kelly Beatty, Sky and Telescope Magazine Space Science and Public Perceptions: We Have Met the Enemy...

Audience Discussion

96 ______32nd LPSC Program Thursday, March 15, 2001 POSTER SESSION II 7:00-9:30 p.m. UHCL

Mars Surface Properties I

Fonti S. Blanco A. Blecka M. I. De Carlo F. Orofino V. Polimeno N. Spectral Emissivity as a Tool for the Interpretation of Martian Data: A Laboratory Approach [#1279] Leece Astrophysics Group is involved in a systematic study of spectral emissivity performed with an especially developed setup, aimed to the analysis of analogs of martian materials. The goal is to better understand Mars's climatic evolution and life development possibility.

Marcino D. Cloutis E. Asher P. Strong J. Russell B. Goltz D. Spectral-Compositional Properties of Iron-bearing Clays: Remote Sensing Implications [#1199] Reflectance spectra of iron-bearing clays exhibit a number of absorption features in the 0.3-1.2 p.m region that are common to many of the clays but which vary from species to species.

Krenn K. M. Cloutis E. A. Russell B. Kollar S. Strong J. Reflectance Spectra of Jarosite Minerals: Implications for Mars [#1223] Reflectance spectra of jarosites exhibit a large number of common, and in some cases unique, absorption features as well as small variations in band positions and band depths which may be related to slight structural variations.

Cloutis E. A. Asher P. M. Mertzman S. A. Guertin M. Spectral Reflectance Properties of Zeolite Group Minerals [#1202] The reflectance spectra of zeolites exhibit a number of absorption features, most of which are associated with adsorbed water and hence cannot be used to discriminate different zeolites. However the wavelength position of the Christansen band is diagnostic of AI content.

Sharma S. K. AngelS. M. Ghosh M. H. W. Lucey P. G. Remote Pulsed-Laser Raman Spectroscopy System for Mineral Analysis [#2066] We have measured Raman spectra of carbonate, silicate, and hydrous silicate and sulfate minerals, our new remote- pulsed Raman system, indicating that it can be used to analyze the minerals on planetary surfaces to a distance of 10 to 66 meters.

Chio C. H. Sharma S. K. Lucey P. G. Muenow D. W. Raman Spectroscopic Studies of the Laser-induced Heating in Alpha-Quartz of Various Grain Sizes [#1471] Raman spectroscopic studies of quartz of various grain size have shown the effects of laser-induced heating of the sample as grain size approaches the sub-micron range.

Mustard J. F. Murchie S. L. Unusual Spectral Properties Observed in Valles Marineris [#2194] Two regions of anomalous near-infrared spectral properties were identified in western Candor Chasma in Valles Marineris. They are best modeled as a cemented or lithified mixture of dust and altered mafic materials.

Keirn E. R. Kirkland L. E. Hackwell J. A. Herr K. C. Terrestrial Airborne Hyperspectral Remote Sensing (SEBASS): Applications to Remote Sensing of Mars [#2162] We will show SEBASS terrestrial hyperspectral images, and discuss implications of the results to TES and THEMIS studies of Mars.

32nd LPSC Program------97 Guinness E. A. Arvidson R. E. Jolliff B. L. Morris R. V. Ming D. W. Mapping Alteration Minerals Exposed on the Summit of Mauna Kea Volcano Using A VIRIS Data: Implications for Mapping Mars Mineralogy [#1659] We mapped the distribution of hydrothermal minerals at the summit of Mauna Kea, Hawaii, using Airborne Visible Infrared Imaging Spectrometer data. Our results provide a test on the detectability of hydrothermal alteration products on Mars at visible and near-IR wavelengths.

Strong J. Cloutis E. A. Russell B. Spectral Properties of Carbonates in the 2.0-2.5 flm Region: Implications for Mars [#1197] The reflectance spectra of both hydrous and anhydrous carbonates exhibit a number of absorption bands in the 2.0- 2.5 flm region. These bands are characteristic of the particular carbonates and become increasingly evident with decreasing water content.

Quinn R. C. Zent A. P. McKay C. P. Photodecomposition of Carbonates on Mars [#1463] We report on experimental investigations of the photo-induced decomposition of calcium carbonate in both a simulated martian atmosphere and under high vacuum.

Wentworth S. J. Velbel M.A. Thomas-Keprta K. L. Longazo T. G. McKay D. S. Weathering ofMartian Evaporites [#2108] Evaporites in martian meteorites contain weathering or alteration features that may provide clues about the martian near-surface environment over time.

Bodnar R. J. PTX. Phase Equilibria in the H20-COrSalt System at Mars Near-Surface Conditions [#1689] The P-T range over which liquid is stable in the system water-carbon dioxide-salt is considered relative to Mars near-surface conditions. The breakdown of carbon dioxide clathrate in the subsurface provides both the liquid and the energy to produce surface erosion.

Longhi J. Clathrate and Ice Stability in a Porous Martian Regolith [#1955] COrclathrate becomes stable with respect to combinations of COr rich gas and water ice at depths '?::.7 m on Mars. However, if the gas in a porous regolith is in hydraulic contact with the atmosphere, both clathrate and ice will be unstable.

Bishop J. L. Schiffman P. Murad E. Southard R. Iceland as a Model for Chemical Alteration on Mars [#1435] Subglacial volcanic activity on Iceland has led to the formation of a variety of silicate and iron oxide-rich alteration products that may ressemble chemical alteration on Mars. The spectral and chemical properties of Icelandic samples are presented.

Calvin W. M. Vaughan R. G. Taranik J. Smailbegovic A. Acid Sulfate Alteration of Basaltic Andesites: A Case Study near Reno, Nevada [#1379] Recent observations show that much of the martian surface is andesitic in nature. Examination of acid sulfate alteration on basaltic-andesite volcanics near Reno, Nevada, can provide clues to the weathering of the martian northern lowlands.

Abbott N. Lepper K. McKeever S. W. S. A Survey of the Luminescence Dose Response of a Variety of Terrestrial Basalts and Andesites as Analogs of Mars Surface Materials [#1974] We report here the results of ongoing experiments with terrestrial analogs of martian surface materials to establish a broad materials knowledge base for development of in-situ luminescence dating procedures and equipment.

98 ______32nd LPSC Program Mars Surface Properties II

Lauer H. V. Jr. Ming D. W. Golden D. C. Lin I-C. Characterization of the Thermal Properties of Magnetite Using Differential Scanning Calorimetry [#2071] Because of its possible importance to Mars science we are reporting on the thermal and crystalline properties of magnetic particles synthesized over a wide range of temperatures in a controlled 1-bar reducing atmosphere furnace.

Bandfield J. L. Smith M.D. Multiple Emission Angle Surface-Atmosphere Separations ofMGS Thermal Emission Spectrometer Data [#1596] Multiple emission angle observations taken by MGS-TES have been used to derive atmospheric opacities and surface temperatures and emisivities with increased accuracy and wavelength coverage. Martian high albedo region surface spectra have now been isolated.

Presley M. A. The Effect of Bulk Density on the Thermal Conductivity of Particulate Materials Under Martian Atmospheric Pressures [#1813] Thermal conductivities of particulate samples under atmospheric pressures typical of the martian surface are measured with a line-heat source apparatus. Thermal conductivity exhibits linear dependence on the bulk density of the material.

Milam K. A. McSween H. Y. Jr. Possible Effects ofZonation in Plagioclase on Thermal Emission Spectra: A Progress Report [#1707] This study examines the effects of plagioclase zoning in thermal emission spectra using a new technique of experimental analysis developed at the University of Tennessee and Arizona State University.

CavendishT.A. WyattM.B. HamiltonV.E. McSweenH.Y.Jr. GroveT.L. ChristensenP.R. Bulk Chemistry of Medicine Lake Lavas from Deconvolution of Thermal Emission Spectra [#2023] Modeled bulk of volcanic rocks are examined for their effectiveness in classifying different volcanic lithologies and interpreting petrologic processes. Results are applicable to the study of martian surface compositions.

Paarlberg R. L. Christensen P. R. Understanding Processes that have Influenced Surface Properties on Mars: Integrating TES-derived Thermal Inertia with High-Resolution MOC Images [#1117] This study uses TES-derived thermal inertia information and high-resolution MOC images to determine the relationship between the physical properties of the upper surface material and meter-scale landforms and surface characteristics.

NobleS. K. Pieters C. M. Type 2 Terrain: Compositional Constraints on the Martian Lowlands [#1230] The presence of glass and/or weathering products can the mid-IR spectral properties of a basaltic surface to mimic a more silicic composition.

Catling D. C. Moore J. M. Sedimentary Hematite on Mars and Its Implications for the Early Martian Environment [#2053] Crystalline hematite deposits detected by Mars Global Surveyor are thought to have formed aqueously on early Mars. The formation of such deposits is discussed with regard to the overall redox implications for the early environment and early life.

Glotch T. D. Holloway J. R. Christensen P.R. Experimental Replication of the Surface of the Sinus Meridiani Hematite Region [#2020] Preliminary wet chemistry experiments have begun with the ultimate goal of reproducing the vibrational spectrum of the surface of Sinus Meridiani. Results and future work will be discussed.

32nd LPSC Program------99 M. D. Hartmann W. K. Berman D. C. Update on Studies of the Martian Hematite-rich Areas [#1984] A synthesis of MGS TES and MOC data on the Sinus Meridiani hematite area yields two independent indications that this area has been exhumed: 1) spectral evidence shows the hematite is in a platy mode that may have been produced by burial, 2) crater ages suggest preservation.

Sammartino P. Komatsu G. Diverse Origins for Hematite on Mars [#1167] Crystalline hematite occurs in a wide variety of geological settings on the martian surface (identified by TES and Viking/Phobos II ISM), and origin of their mineralizations can be diverse.

Williams K. K. Greeley R. Laboratory Measurements of Radar Transmission Through Dust with Implications for Radar Imaging on Mars [#1264] Measurements of radar transmission through a Mars analog dust are used to calculate values of signal attenuation over a frequency range of0.5-12 GHz. These values are discussed in the context of a Mars radar imaging mission.

GraffT. G. Morris R. V. Christensen P.R. Effects of Palagonitic Dust Coatings on Thermal Emission Spectra of Rocks and Minerals: Implications for Mineralogical Characterization of the Martian Suiface by MGS-TES [#1899] Thermal emission measurements on dust-coated rocks and minerals show that a 300 Jlm thick layer is required to mask emission from the substrate and that non-linear effects are present.

Hamilton V. E. Morris R. V. Christensen P. R. Determining the Composition of Martian Dust and Soils Using MGS TES: Midinfrared Emission Spectra of Variable-Composition Palagonites [#2123] To identify palagonitic components on the martian surface it is important to have spectra representative of the variability in palagonite chemistry. Our objective is to create a set of midinfrared spectra of palagonitic soils that exhibit such a range.

Marshall J. Kuhlman K. Stevens R. Meyyappan M. Study ofa Martian Aeolian Sand Analog with MECA Microscopy [#1265] MECA microscopy (built for Mars '01) is simulated to show the potential of in situ microscopic analyses of surface materials on Mars. In particular, the value of nanotechnology is demonstrated.

Kuhlman K. R. Marshall J. Evans N.D. Luttge A. Multi-Technique Study of a Martian Aeolian Sand Analog [#1887] Potential scientific returns from technological advances in various forms of microscopy and benchmarking of currently available in-situ measurements using an aeolian red dune sand from the central Australian desert.

Murchie S. Barnouin-Jha O. Johnson J. Bell J. F. III Morris R. Spectral Differences Between Shape Classes of Rocks at the Mars Pathfinder Landing Site [#1825] Development of coatings on rocks at the Mars Pathfinder landing sites varies systematically between different shape classes of rocks. This variation may originate from differences in rocks' exposure ages, or it may reflect differences in primary lithologies.

Golombek M. P. Extreme Rock Distributions on Mars [#1116] Extreme rock size-frequency distributions from rare boulder fields in MOC images are compared with the three landing sites. Results suggest that most of Mars where such boulders are absent is relatively free of such large potentially hazardous rocks.

100 ______32nd LPSC Program Basilevsky A. T. Thomas N. Hviid S. F. Keller H. U. Color Ratios of the APXS Analyzed Rocks at the Mars Pathfinder Landing Site [#1099] Analysis of red/blue color ratios for eight APXS-analyzed rocks and their close vicinities at the Mars Pathfinder site has been done. Implications of this study on character of the exogenic processes at the site are presented.

Crumpler L. S. Vesicles in Suiface Rocks: Detection, Analysis and Significance [#2007] Vesicle distributions in martian lavas are predicted to be distinct relative to terrestrial lavas. They may offer a means of determining initial vesicularity and gas content, details of lava emplacement, and early atmospheric pressure on Mars.

Ward J. G. Kirkland L. E. Keller D. April R. Terrestrial Rock Varnish: A Key to Understanding the Surface Composition ofMars [#1925] We examine whether thermal infrared spectra (5-25 {lm) may be used to differentiate between different poorly ordered silicates (desert varnish, glassy silicate cooling rind, and glassy basalt), and what the results indicate for remote sensing of Mars.

Mars Atmosphere and Dust

Rao M. N. Bogard D. D. Ny~uist L. E. McKay D. S. Masarik J. Neutron-Capture 8°Kr and 3 Ar in the Martian Atmosphere and Regolith [#1701] We calculate that -10% of martian atmospheric 80Kr formed by neutron capture on Mars in <-0.5 Ga. The regolith contains even larger amounts of n-capture 80Kr and 36Ar, which may provide clues to the evolution of the martian regolith and atmosphere.

Wang H. Ingersoll A. P. North Polar Cloud Activity on Mars from Mid Summer to Late Fall [#1460] We examine the martian cloud type and distribution in the north polar region using the Mars daily global maps from

mid summer to late fall (L5: 135-270). Active cloud activity is seen throughout this period.

HoffmanN. Habitable Zones for Terrestrial Planets in a C02 Polar Condensation Scenario [#1286] Simple models that include polar condensation of C02 ice predict that Mars is well outside the Habitable Zone and should have been an iceworld for its entire history. Most atmospheric models neglect polar condensation and therefore overestimate the outer bound of the HZ.

Nakamura T. Tajika E. Abe Y. Multiple Solutions in the Martian Climate System Under the Seasonal Change Condition [#1528] We introduce a one-dimensional energy balance climate model for Mars to discuss possibility of the existence of

multiple solutions for the martian climate system, considering three major C02 reservoirs and seasonal change of solar incident flux.

Hansen G. B. Empirical Optical Properties of Martian Dust [#1282] In an effort to improve our analysis of martian polar spectra, we have calculated an improved set of optical constants from 7 to 50 microns wavelength based on infrared spectra from the Mariner 9 mission.

Delory G. T. Farrell W. M. Desch M.D. A Global Electric Circuit on Mars [#2150] We describe conditions on the surface of Mars conducive to the formation of a martian global electric circuit, in a direct analogy to the terrestrial case where atmospheric currents and electric fields are generated worldwide through the charging in thunderstorms.

32nd LPSC Program------101 Metzger S. M. Recent Advances in Understanding Dust Devil Processes and Sediment Flux on Earth and Mars [#2157] There is a high frequency of dust devil events active over diverse arid surfaces on Earth and Mars that loft a surprisingly high dust load well into the atmosphere. This report presents numerous new findings on the subject.

Mars Missions

Anderson R. C. Castano R. Stough T. Gor V. Mjolsness E. Using Scaled Visual Texture for Autonomous Rock Clustering [#2103] To maximize the return on future planetary missions, it will be critical that rovers have the capability to analyze information onboard and select and return data that is most likely to yield valuable scientific discoveries.

Seelos F. P. IV Arvidson R. E. Squyres S. W. Baumgartner E. T. Schenker P. S. Jolliff B. L. Niebur C. S. Larsen K. W. Snider N. O. FIDO Prototype Mars Rover Field Trials, May 2000, Black Rock Summit, Nevada [#1884] Results of May 2000 field testing of the FIDO prototype Mars rover are summarized. Tests included remote science operations and simulated aspects of the Athena payload for 2003 MER.

Wiens R. C. Cremers D. A Ferris M. Arvidson R. E. Seelos F. P. IV Blacic J.D. Nordholt J. E. Elemental Compositions at Stand-Off Distances from a Rover: Development and Testing ofa Laser-induced Breakdown Spectroscopy (LIBS) Field Prototype Instrument [#1339] LIBS is a new technique for obtaining elemental compositions up to 20m from the rover or lander. Under the MIDP Program an initial field prototype was built and integrated into the K9 rover for field tests in Nevada in May 2000. Results are reported here.

Cairns B. Fenton A HoffmanN. Progress Towards Mars Rover Simulations in the Australian Outback [#1491] Mars Society Australia plans to conduct field operations of a simulated pressurised rover in the Australian desert. Scientific objectives will be combined with construction and design techniques to assist with future manned miSSIOnS.

Chicarro A F. Status of the European Mars Express Mission [#1044] The European Mars Express mission to be launched in 2003 consists of an orbiter and a lander focusing on surface mapping, subsurface water, atmospheric studies and detection of signs of past or present life.

Martin P. D. Chicarro A F. Zender J. J. Hechler M. Science Objectives and Planning for the Mars Express Orbiter [#1575] This paper gives the scientific objectives of the ESA Mars Express mission and describes the mission phases that are planned to achieve these goals. Finally, it presents the preliminary science planning for the Mars Express Orbiter payload.

Morrison A D. Thompson T. W. Acton C. H. Jr. Bourke R. D. Butman S. Jepsen P. L. Johnson W. T. K. Lavoie S. K. Metzger R. M. Plaut J. J. Vaisnys A U.S. Participation in the Mars Express Mission [#1113] NASA will provide the antenna and RF subsystem to the MARSIS radar sounder. There are 11 U.S. Co-l's for the science investigations, and navigation and data archiving support are also provided. ASPERA-3 receives NASA funding.

Marinangeli L. Ormo J. Ori G. G. Baliva A Investigating the Subsuiface Geology ofMars Using the MARSIS Radar Instrument of the Mars Express Mission [#1537] The MARS IS radar will show for the first time the characteristics of the subsurface of Mars. This work is based on the new MGS data and will provide models of the martian subsurface in different geological settings to simulate the radar response.

102 ______32nd LPSC Program Hviid S. F. Thomas N. Keller H. U. Markiewicz W. J. Bluemchen T. Smith P. Tanner R. Reynolds R. Oquest C. Josset J. WhiteheadS. Pillinger C. Hofmann B. The Beagle2 Optical Microscope [#1731] Introduction to the Beagle2 optical microscope.

Ringrose T. J. Zarnecki J. C. Towner M. C. Kapartis S. Strachan R. Martian Dust Devil Detection with the Beagle 2 Wind Sensor [#1281] Beagle 2 is a Mars lander expected to land on December 26, 2003. The Beagle 2 wind sensor utilizes an ultrasonic technique, which is unique to planetary landers, and with other sensors will identify, and characterise dust devils.

Bridges J. C. Seabrook A.M. Kim J. R. Muller J-P. Rothery D. A. Pillinger C. T. Sims M. R. Wright I. P. Grady M. M. Mitchell K. L. Morley J. G. The Beagle 2 Landing Site in Isidis Planitia [#1652] The Mars probe Beagle 2 will land in Isidis Planitia. This region satisfies the engineering constraints and has evidence for particularly volatile-rich subsoil. Isidis provides a suitable place for the lander to search for H20 and organic matter.

Hiesinger H. Head J. W. III Russell P. Thomson B. Neukum G. Jaumann R. Hauber E. Hoffmann H. Arabia Terra, Mars: Evaluation of Potential Target Sites for the High-Resolution Stereo Camera (HRSC) On Board the MARS EXPRESS Mission [#1014] Geologic diversity, orbital constraints, illumination conditions, as well as the volume of data that can be returned to Earth, make it necessary to carefully evaluate imaging possibilities and strategies of the HRSC camera.

Golombek M. Parker T. Schofield T. Kass D. Crisp J. Haldemann A. Knocke P. Roncoli R. Lee W. Adler M. Bridges N. Anderson S. Grant J. Squyres S. Preliminary Engineering Constraints and Potential Landing Sites for the Mars Exploration Rovers [#1234] Preliminary engineering constraints on Mars Exploration Rover landing sites are derived, mapped into remote sensing criteria, and used to identify potential landing sites. High-priority sites via an open request to the science community and future plans are described.

Anderson F. S. Golombek M.P. Using MOC and MOLA Data to Assess Landing Site Safety [#2173] Techniques for Using MOC and MOLA Data for Constraining Landing Site Safety

Beyer R. A. McEwen A. S. Measurements ofMartian Surface Roughness for Landing Site Studies Via 1-D Photoclinometry [#2056] We present quantitative measurements of martian surface roughness derived from one-dimensional photoclinometry of MOC images for areas under consideration as potential landing sites for the 2003 lander/rover missions.

Jurgens R. F. Haldemann A. F. C. Slade M.A. GSSR Mars Delay- Data Available for MER Landing Site Assessment [#1162] GSSR observation of Mars made over the past 10 years are tabulated. Some ofthese are two station interferometric data that can now be processed using MOLA aided altimetry to provide N/S separation and higher resolution. New 2001 observations are targeted at MER sites.

Kirkland L. E. Herr K. C. P. M. Keirn E. R. Salisbury J. W. Hackwell J. A. Landing Site Selection Using Infrared Data Sets of Mars [#1903] We will examine the effect of surface properties on mineral detection limits using thermal emission spectra, and what the results indicate for using TES and THEMIS for Mars landing site selection.

32nd LPSC Program------103 Crumpler L. S. Tanaka K. L. Hare T. M. Mars Exploration Rover Target Sites in Southern Isidis [#1977] We have evaluated our geologic mapping to define the best sites for accomplishing MER science goals. Sites along the terminal sediment fans permit access to the geologic materials of interest outlined in previous ('01) targeting exercises.

Haskin L. Wang A. Jolliff B. Wdowiak T. Agresti D. Lane A. Squyres S. The Mars Microbeam Raman Spectrometer (MMRS) [#1705] The Mars Microbeam Raman Spectrometer can identify minerals in situ, determine rock types and textures, provide some mineral chemistry, detect organic and biogenic materials, and identify bound water.

Kuebler K. E. Wang A. Abbott K. Haskin L.A. Can We Detect Carbonate and Sulfate Minerals on the Surface of Mars by Raman Spectroscopy? [#1889] Raman spectra of micrometer-sized grains of calcite, epsomite, quartz, and olivine show no peak shift relative to larger crystals and no peak broadening at least down to 2 micrometers, which bodes well for the Raman analysis of martian soils.

Craig M. Cloutis E. A. Mueller T. ME and Mini-ME: Two Mars Environmental Simulation Chambers for Reflectance Spectroscopy [#1368] Two environment chambers have been constructed which are designed to simulate Mars surface conditions of atmospheric pressure and composition, temperature and ultraviolet light regime while allowing spectral measurements of samples across a wide wavelength range.

MollerL. E. Critical Angle of Repose ofMartian Dust [#1470] This work describes an instrument in the MECA experiment bay of the canceled Mars Surveyor 2001 Lander Mission and related laboratory experiments. The Planetary Society and NASA-JPL selected this project in the Student Nano-Experiment Challenge.

Missions, Instrumentation, and Sample Collection/Curation

Asphaug E. Belton M. J. S. Kakuda R. Y. Geophysical Exploration ofAsteroids: The Deep Interior Mission Concept [#1867] We describe a possible international multiple-rendezvous mission to probe the interiors representative near-Earth objects. Features include SEP, autonav, stereo imaging, radio tomography, anchored stations and explosive signal sources.

Okada T. Kato M. Shirai K. Yamamoto Y. Matsuda T. Tsunemi H. Kitamoto S. The XRS Instrument Onboard Muses-C Asteroid Mission [#1660] The XRS instrument onboard MUSES-C asteroid mission is designed as the flight model. We present its specification and the observation plan. The XRS is designed mainly for elemental analysis but it also provides thermal properties of the asteroid.

Lorenz R. D. Shandera S. E. Triboelectric Charging, Heating, Crushing, Erosion: Experiments on Target Effects During Penetrator Emplacement [#1237] We've been measuring the weird stuff that happens when you hit the dirt at 80 miles an hour. As if impact penetration loads themselves weren't bad enough, many ofthese processes severely affect sensor performance.

Moss C. E. Browne M. C. Ianakiev K. D. Prettyman T. H. Reedy R. C. Results from a Prototype Multi-Element CdZnTe Gamma-Ray Detector for Planetary Missions [#1260] We present high energy results for a 2 x 2 x 2 array of eight 10 mm x 10 mm x 5 mm coplanar grid CdZnTe detectors. We conclude that such an array can provide a room-temperature detector with good resolution and efficiency for planetary missions.

104 ______32nd LPSC Program Horton K. A. Sharma S. K. Domergue- N. Lucey P. G. Performance ofa CW-Laser Remote Raman System [#1462] Ability to perform Raman analysis remotely from a planetary lander increases a rover's range while decreasing risks. Calibration of the intensity of the remote Raman signal and derivation of the cross section of materials at distance is demonstrated.

Kuhlman K. R. Martens R. L. Kelly T. F. Evans N.D. M. K. Field Ion Microscopy and Atom Probe Tomography of Metamorphic Magnetite Crystals [#1930] Magnetite has been analysed using Field Ion Microscopy (FIM) and Atom Probe Tomography (APT), highly attractive techniques for the nanoanalysis of geological materials despite the difficulties inherent in analyzing semiconducting and insulating materials.

Delaney J. S. Dyar M.D. SuttonS. R. Quantifying X-Ray Pleochroism Effects in Synchrotron Micro-XANES Microanalyses of Elemental Oxidation States: Feldspar and Biotite [#1936] X-ray pleochroism is a predictable source of scatter in synchrotron microXANES analyses of elemental oxidation states. The magnitude of the effect is illustrated and a procedure to compensate for it has been implemented, reducing errors significantly.

Shappirio M. Wiens R. C. Nordholt J. E. Cremers D. Ferris M. Development of an Instrument for Isotopic and Elemental Composition Analysis at Stand-Off Distances on Airless Planetary Surfaces [#1722] We are developing an instrument utilizing laser ablation and ion mass spectrometry to determine the isotopic and elemental composition of airless bodies for elements< 60 amu. We will present the preliminary results of laboratory testing.

Dyar M.D. Rossman G. R. Delaney J. S. SuttonS. R. Newville M. Interpretation of Fe-XANES Pre-Edge Spectra: Predictions Based on Co and Fe Optical Spectra [#1816] Microanalysis of Fe3+ffotal(Fe) in extraterrestrial samples is important due to sample size constraints of sample return missions. We compare Fe XANES spectra with Co optical spectra that predict valence electron levels based on 'Z+ 1' model.

Cloutis E. A. H20/0H-Associated Absorption Band Depth Relationships in Mineral Reflectance Spectra [#1146] Reflectance spectra of various minerals exhibit complex relationships between water/OR-associated absorption bands. Strong bands in the 3JLm region do not necessarily imply significant hydration or large water contents.

Pinet P. C. Cord A.M. Daydou Y. H. Boubault F. R. Chevrel S.D. Lapeyrere V. Influence of Linear Versus Non-Linear Mixture on Bidirectional Reflectance Spectra Using a Laboratory Wide Field Spectral Imaging Facility [#1552] We conduct experimental studies to quantify the impact of intimate mixtures and physical properties of materials, and shade, in the deconvolution process of bidirectional reflectance spectra of heterogeneous macroscopic targets with varied mineralogies.

Shepard M. K. The Bloomsburg University Goniometer (B. U.G.) Laboratory: An Integrated Laboratory for Measuring Bidirectional Reflectance Functions [#1015] We have constructed a photometric goniometer for measuring the full bidirectional reflectance function of planetary analog materials.

Bish D. L. Vaniman D. T. Chipera S. J. Yen A. S. Jones S.M. Aerogel as a Sample Collector and Sample Mount for Transmission XRD Analysis [#1416] Silica aerogel can be used for dust collection and in situ X-ray analysis. Aerogels can be less absorbing than Be, and it is feasible to obtain X-ray transmission factors >50% using typical aerogels together with a 100-micrometer Be backing foil.

32nd LPSC Program------105 Stansbery E. K. Cyr K. E. Allton J. H. Schwarz C. M. Warren J. L. Schwandt C. S. Hittle J.D. Genesis Discovery Mission: Science Canister Processing at JSC [#2084] Description of collector material installation and final cleaning of the Genesis Discovery Mission science canister at JSC.

CyrK. E. JSC Curation and Future Sample Return Missions [#1420] Johnson Space Center is the NASA center charged with curation of extraterrestrial samples, and is currently participating on several missions. Our experience shows that curation efforts need to start early, during mission planning and mission design.

Fire and ICE (lo, Callisto, Europa)

Williams D. A. Radebaugh J. Keszthelyi L. Simonelli D. M~Ewen A. Lopes-Gautier R. Greeley R. Galileo SSI Team Mapping of the Chaac-Camaxtli Region of Io [#1220] This presentation discusses our initial observations about the Chaac-Camaxtli region of Jupiter's moon Io, using Galileo SSI and NIMS data from the February 2000 flyby (orbit 127) and planetary mapping.

Keszthelyi L. Harris A. J. L. Flynn L. Davies A. G. McEwen A. S. Interpreting Low Spatial Resolution Thermal Data from Active Volcanoes on Io and the Earth [#1523] The style of volcanism was successfully determined at a number of active volcanoes on Io and the Earth using the same techniques to interpret thermal remote sensing data.

Cataldo V. Wilson L. Leone G. Ascent and Eruption of Magmas on Io: Application to Pele [#1555] We model eruptions at the Pele vent on lo as being due to discrete buoyant dikes (volumes -30 million cubic m) rising from a deep reservoir under crustal structural control and absorbing near-surface S02 io feed short-lived ( -1 hr long) events.

Archinal B. A. Davies M. E. Colvin T. R. BeckerT. L. Kirk R. L. Gitlin A. R. An Improved RAND-USGS Control Network and Size Determination for Io [#1746] A new photogrammetric control solution has been performed for Jupiter's moon Io, using only Galileo SSI image measurements, giving triaxial ellipsoid semi-axis estimates consistent with determinations via other methods.

Wilson R. R. Schenk P.M. Topographic Mapping of /o from Voyager and Galileo Stereo Images: Mountains, Calderas, and Volcanoes, Oh My! [#1834] Topographic mapping of Io, based on stereo images, has been completed, nominally covering up to 75% of the surface. Heights and surface slopes, are reported for ionian mountains, calderas and volcanoes.

Turtle E. P. Jaeger W. L. Keszthelyi L. P. McEwen A. S. Formation Models of Ionian Mountains [#2104] We have conducted a series of numerical simulations to evaluate various mechanisms for the formation of mountains on Io, investigating the role played by Io's high global resurfacing rate and the relationship between tectonics and volcanism.

Milazzo M.P. Geissler P. E. Greenberg R. Keszthelyi L. P. McEwen A. S. Radebaugh J. Turtle E. P. Galileo SSI Team Does Io Rotate Non-Synchronously? [#2089] We present work on the investigation of whether Io rotates non-synchronously.

106 ______32nd LPSC Program Smythe W. D. Kieffer S. W. Lopes-Gautier R. Plume Models and Pyroclastic Flow on Io [#2129] Models oflo's plumes have been run varying atmospheric pressure, vent size, and volatile content. These simulations suggest that eruptions with low volatile content can form pyroclastic flows on Io.

McEwen A. Geissler P. Milazzo M. Turtle E. Keszthelyi L. Porco C. Simonelli D. Belton M. Galileo SSI Team Cassini and Galileo Imaging Observations of Io [#1824] Galileo completed its 29th periapsis of Jupiter on 12-29-2000, and the closest approach to Jupiter by Cassini occurred the next day. Both spacecraft cameras imaged Io, especially during eclipses to observe high-temperature hot spots and visible aurora.

Monnereau M. Dubuffet F. Is Io's Mantle Really Molten? [#1784] Spherical models of mantle convection of Io including volcanism cooling effects show the possible existence of cold mantle compatible with the strong heat flux and the topographic relief observed on Io.

Klemaszewski J. E. Greeley R. Geological Evidence for an Ocean on Callisto [#1818] Callisto's multiring structures may provide geological evidence consistent with the presence of an ocean. The presence of concentric and radial fractures at Asgard, Utgard and Valhalla suggest the presence of an ocean at the times of their formation.

Wagner R. Neukum G. Greeley R. Klemaszewski J. E. Galilee Imaging Team Fractures, Scarps, and Lineaments on Callisto and Their Correlation with Surface Degradation [#1838] Tectonic features on Callisto are found in multi-ring structures and in several areas in its dark, cratered plains units. In this paper, we will investigate tectonic features outside multi-ring basins and their correlation with surface degradation.

Jensen E. A. Thermal Constraints to Callisto's Internal Structure [#2095] Callisto's internal structure is tightly constrained by Galilee's magnetometer evidence of an ocean. Of all the possible internal structures that Callisto may have, only those with a thin lithosphere had oceans.

Kattenhorn S. A. Detailed Fracture History of the Bright Plains Region, Europa: Implications from Nonsynchronous Rotation Models [#1238] Fracture orientations in the Bright Plains imply clockwise rotation of principal stresses through time. This behavior is consistent with nonsynchronous rotation (NSR) models. At least 720° ofNSR of Europa's crust is implied by the fracture sequence.

Michalski J. Greeley R. Figueredo P. H. En Echelon Ridge and Trough Structures on Europa [#1091] Some Europan lineaments exhibit en echelon ridge and trough structures. This study focuses on characterizing such structures and offers an explanation of how they form.

Prieto O. Kargel J. S. Specific Heat Capacity Data of Some Hydrated Salts at Low Temperature. Applications to Europa Satellite [#1625] The surface and the crust of the satellite Europa are contaminated by materials that some authors has recognized as hydrated salts or as hydrated sulfuric acid. We present data about the heat capacity of powdered epsomite, mirabillite and natron between 298 K and 173 K.

32nd LPSC Program------107 Europa Surface-Subsurface Material Interchange, Burial, and Resurfacing Processes

Mevel L. Grasset O. Mercier E. Impact Features on Europa: Rheological and Thermal States of the Icy Crust [#1519] Rheological and thermal characteristics of Europa icy crust are studied in the two impact features Tyre and Callanish. The importance of grain size, composition, and deformation rates, on the rheological structure of the icy crust are investigated.

Turtle E. P. Pierazzo E. Vapor and Melt Production During the Formation of Impact Craters on Europa [#1933] We use hydrocode simulations to determine the amount of vapor and melt produced by impacts into Europa for various projectile and target parameters including ice thickness. We find that a 1 km comet can completely melt through a 5 km thick ice layer.

Bierhaus E. B. Chapman C. R. Merline W. J. On the Clustering of Europa's Small Craters [#1967] We analyze the spatial distribution of Europa's small craters and find that many are too tightly clustered to result from random, primary impacts.

SchenkP. M. McKinnon W. B. Topographic Variability on Europa from Galileo Stereo Images [#2078] DEMs of Europa based on Galileo stereo images reveals a diversity oftopographic features. These topographic variations may place constraints on the formation of geologic features and the nature of the icy shell.

Figueredo P. H. Chuang F. C. Kirk R. L. Greeley R. Europa's 'Mitten': Morphology, Topography and Suiface Evolution [#1081] We present morphological and topographic evidence for a cryovolcanic origin of Europa's mitten and discuss a multiple-stage surface evolution model. A El7 crustal dome is identified as representative of the mitten's early stages.

Tuckwell G. W. Prockter L. M. Formation of on Europa: Constraints on the Development of Brittle Failure from Numerical Models [#1569] Models of brittle deformation in the lithosphere due to diapiric buoyancy produce realistic patterns of failure. Parameters controlling deformation are identified and constrained. Diapir buoyancy and lithosphere strength are most significant.

O'Brien D.P. Geissler P. Greenberg R. Tufts B. R. A Melt-Through Model for Chaos Formation on Europa [#2050] Given uncertainties in the internal state of Europa, large internal heat production is plausible, and modest localized heat concentrations can form chaos regions by melt-through at a rate which exceeds the rate of flow of ice into a melting region.

Swindle T. D. Chronology: An Important (and Potentially Accessible) Parameter in Understanding Europa Suiface-Subsurface Material Interchange, Burial, and Resurfacing Processes [#1469] Time is an important parameter in understanding the interaction of the surface and subsurface of Europa. It should be possible to determine potassium-argon and cosmic ray exposure ages in situ on the surface of Europa.

Spaun N. A. Pappalardo R. T. Head J. W. III Sherman N.D. Characteristics of the Trailing Equatorial Quadrant of Europa from Galileo Imaging Data: Evidence for Shear Failure in Forming Lineae [#1228] We have mapped regions of Europa's trailing equatorial quadrant and found that lineae orientations are not consistent with an origin as tension cracks. Shear failure predictions are a better match for the observations.

108 ______32nd LPSC Program Fagents S. A. Greeley R. Modeling Intrusive Processes in Europa's Ice Lithosphere [#1383] Results of improved models support the hypothesis that dark surfaces associated with triple bands are the consequence of near surface emplacement of warm diapiric or intrusive bodies within Europa's ice lithosphere.

Ekholm A. G. Melosh H. J. Tidal Dissipation Around a Cylindrical Hole in the Europan Ice Shell [#2161] We have modeled the tidal dissipation (and heat flow) around a cylindrical hole in the Europan ice shell, and find that the enhanced dissipation is not enough to prevent an initially open hole from freezing shut.

Bills B. G. Ray R. D. Tidal and Librational Energetics of Europa [#1713] The energetics of Europa are usually considered only in the context of eccentricity driven . We note that the existence of differentiallibrations, and of a finite obliquity, both contribute significantly to the energy budget.

Geissler P. E. O'Brien D.P. Greenberg R. Silicate Volcanism on Europa [#2068] Melting of Europa's silicate interior is possible if the heating rate from tidal dissipation exceeds the rate of heat loss by solid state convection. In that case, the solid ice shell of Europa might be no more than a few kilometers in thickness.

Zolotov M. Yu. Shock E. L. A Hydrothermal Origin for the Sulfate-rich Ocean of Europa [#1990] Thermodynamic calculations show that formation of a sulfate-rich ocean on Europa might require high-temperature alkaline hydrothermal processes in the oxidized silicate mantle. The ocean on Europa could be thought of as a cooled hydrothermal fluid.

Femandez-Remolar D. C. Prieto O. Rodriguez N. Kargel J. S. Amils R. Two Extreme Terrestrial Analogues for Modeling the Custral and Oceanic Evolution of the Satellite Europa [#1630] Two terrestrial scenarios involving extremes in pH-the Tinto River as an acidic extreme and La Mancha lakes as the alkaline one, are studied and compared to the mineral paragenesis of Europa.

Remote Views of the Moon: Past, Present, and Future

Cohen J. L. Pieters C. M. Compositional Diversity at Copernicus: Analysis of Integrated Data Using GIS [#1034] Using a GIS database, we have evaluated the distribution of olivine, anorthosite, and across Copernicus. High-Ca pyroxene appears to exist only in the pooled impact melt, while no pyroxene is present in the olivine-rich central peaks.

Pieters C. M. Stankevich D. G. Shkuratov Yu. G. Taylor L.A. Statistical Analysis of Lunar Mare Soil Mineralogy, Chemistry, and Reflectance Spectra [#1783] The ability of visible-near IR spectroscopy to predict composition is assessed using statistical analysis of LSCC data for mare soils. Links are made between measured elemental composition, mineralogy and visible-near IR spectroscopy using PCA.

Blewett D. T. Lucey P. G. Hawke B. R. Giguere T. A. Holtzmann J. A Comparison of Clementine UWIS Spectral Parameters with Telescopic NIR Band Parameters [#1169] To evaluate the ability of low spectral resolution Clementine UVVIS data to characterize the shape of the 1 micron ferrous absorption band, we compare Clementine spectral parameters with band parameters derived from high spectral resolution telescopic near-IR observations.

32nd LPSC Program------109 Gillis J. J. Jolliff B. L. Bimodal Ti02 Contents of Mare Basalts at Apollo and Luna Sites and Implications for Ti02 Derived from Clementine Spectral Reflectance [#2164] A revised algorithm to estimate Ti contents of mare regions centered on Apollo and Luna sites shows a bimodal distribution, consistent with mare-basalt sample data. A global Ti02 map shows abundant intermediate Ti02 basalts in western Procellarum.

Kreslavsky M.A. Shkuratov Yu. G. Anomalies of the Lunar Regolith Structure in the Vicinity ofApollo-I5 Landing Site: Results from Photometric Analysis of Clementine UWIS Images [#1075] Analysis of a series of frames showed anomalies of the phase dependence of brightness. They are not related to albedo and are caused by anomalies in the small-scale regolith structure. They are associated with some fresh craters and the landing site.

Bussey D. B. J. Robinson M.S. Edwards K. Cook T. C. Watters T. R. Simulation of Illumination Conditions at the [#1907] Illumination simulations corresponding to Lunar Orbiter and Clementine images indicate that the available topography data are good. Simulations permit the determination of seasonal lighting variations at the lunar poles.

Rosiek M. R. Aeschliman R. Lunar Shaded Relief Map Updated with Clementine Data [#1943] Lunar maps at 1: 10,000,000 scale will show elevation in false color superimposed on the shaded relief airbrush base. This series will consist of three map sheets, each portraying two opposite hemispheres.

Gaddis L. R. Sucharski T. BeckerT. Gitlin A. Cartographic Processing of Digital Lunar Orbiter Data [#1892] We have completed work for a pilot project demonstrating our capabilities for high-resolutiondigitization and cartographic processing of five full Lunar Orbiter (LO) IV frames.

Isbell C. E. Eliason E. M. Lee E. M. McEwen A. S. Clementine: Reduced Resolution Digital Image Model of the Moon [#2076] A reduced resolution Digital Image Model (DIM) of the Moon is described. This DIM is derived from the existing Clemetine UVVIS 5-band full resolution DIM. The new DIM is a global dataset presented at 0.5, 2.5, and 12.5 km/pixel resolutions.

Johnson J. R. Maurice S. Feldman W. Lawrence D. Lucey P. Swindle T. Hydrogen Distribution from Lunar Prospector Epithermal Neutron Data: Correlations with Impact Craters and Landing Site Samples [#1440] Lunar Prospector epithermal neutron counts correlate with maturity-normalized H contents of lunar soils and with Copernican crater ages. The latter suggests the youngest ejecta have the lowest [H] due to relative lack of exposure to the solar wind.

Chevrel S.D. Pinet P. C. Daydou Y. Lawrence D. J. Feldman W. C. Maurice S. Lucey P. G. Comparison Between Spectral Clementine and Gamma-Ray Lunar Prospector Iron Abundances on the Moon [#1594] An important result from this comparison is that Lunar Prospector shows lower iron abundances in the South Pole- Aitken region than Clementine, indicating that lower crust rather than mantle would have been excavated in the impact forming the basin.

Foldi T. Berczi Sz. The Source of Water Molecules in the Vicinity of the Moon [#1148] Two continuous sources of molecules were suggested: terrestrial (+solar) hydrogen, reaching Moon in periodical lunar crossings of the Earth's mangetic tail; and solar wind protons, recombined to atomic H, reducing oxides of surface rocks.

110 ______32nd LPSC Program Genetay I. Maurice S. d'Uston C. Elphic R. C. Feldman W. C. Gasnault O. Lawrence D. J. Lunar Prospector Integrated Neutrons Below 500keV [#1755] Lunar Prospector integrated neutron flux below 500keV reinforces and complements the previous results obtained with thermal, epithermal and fast data sets.

Gasnault O. Feldman W. C. Maurice S. Genetay I. d'Uston C. The First Lunar Map of the Average Soil Atomic Mass [#1963] Indexes of lunar surface composition were obtained using neutrons spectrometers. We established a strong relationship between fast neutron fluxes and the average soil atomic mass . We inverted this relation to produce the first lunar map of .

Elphic R. C. Feldman W. C. Lawrence D. J. Gasnault O. M. Maurice S. LittleR. Prettyman T. H. Binder A. B. The Lunar Neutron Leakage Flux and Its Measurement by Lunar Prospector Neutron Spectrometers [#1489] We compare calculated neutron leakage flux from the lunar surface to measured values, via modeled instrument response.

Gasnault O. Maurice S. d'Uston C. Feldman W. C. Stratified Composition Effects on Planetary Neutron Flux [#1978] We have demonstrated that a stratified composition in a could change significantly the neutron leakage flux. In particular, the epithermal flux is enhanced when a layer of iron-poor materials is deposited above an iron-rich soil.

Gasnault O. Feldman W. C. d'Uston C. Lawrence D. J. Maurice S. Chevrel S.D. Pinet P. C. Elphic R. C. Genetay I. Moore K. R. Combined Analysis of Thorium and Fast Neutron Data at the Lunar Surface [#1987] Correlated variations of Th vs. fast neutrons are studied, in an attempt to provide a better understanding of the Th emplacement. Th rings around two major structures is also discussed, one of which may be a previously unrecognized impact basin.

Foing B. H. Duke M. Galimov E. Mizutani H. ILEWG Next Steps for International Lunar Exploration [#1827] We report activities and recommendations from the conferences organised by ILEWG International Lunar Exploration Working Group. This covers science questions, technology, data exchange, resources utilisation, the Moon as step to Mars and solar system exploration.

Foing B. H. Heather D. Almeida M. Racca G. Marini A. SMART-I Team ESA 'S SMART-I Mission to the Moon [#1787] ESA' s SMART-1 technology mission is to be launched at the end of 2002, to reach the Moon with Solar Electric Propulsion. Its visible multicolour camera, near IR spectrometer, an X-ray spectrometer will address current key questions of lunar and planetary science.

Dunkin S. K. Grande M. Browning R. D-CIXS Team The D-CIXS X-Ray Spectrometer on ESA 's SMART-I Mission to the Moon [#1310] D-CIXS is an X-ray spectrometer to fly on ESA's SMART-I mission to the Moon. It will complete the first global X-ray fluorescence survey of the Moon, detecting Mg, Si, Fe and AI as well as other elements during solar flares.

Demura H. Hirata N. Otake H. Ohtake M. Sugihara T. Higa M. Matsunaga T. Haruyama J. Data Processing Flow and Products of LISM: Lunar Imager and SpectroMeter [#1648] LISM/ (Lunar Imager and SpectroMeter/SELenological and ENgineering Explorer) data processing flow and products are presented.

32nd LPSC Program------111 Ohtake M. Haruyama J. Matsunaga T. Hirata N. Riga M. Sugihara T. Demura H. Otake H. LISM (Lunar Imager/SpectroMeter) Hardware Development for the SELENE Project and the Analytical Procedure of the LISM Data [#1512] We are developing LISM (Lunar Imager I Spectrometer for the Selene project) hardware along with the analytical procedure of the LISM data. Algorithm for the automatic identification of the lunar reflectance spectra are now in progress.

Tanaka S. Yoshida S. Hagermann A. Hayakawa M. Fujimura A. Mizutani M. In Situ Lunar Heat Flow Experiment Using the LUNAR-A Penetrator [#1495] An in situ lunar heat flow measurement is planned using the Japanese Lunar-A penetrators. The temperature gradient of the regolith is expected to be obtained within 12% error.

Hagermann A. Tanaka S. Yoshida S. Hayakawa M. Fujimura A. Mizutani H. Thermal in Situ Measurements in the Lunar Regolith Using thf{ LUNAR-A Penetrators: An Outline of Data Reduction Methods [#1497] For determining the lunar heat flow two parameters need to be measured: The thermal gradient and the thermal conductivity of the regolith. Methods for inferring these quantities from in situ measurements using the LUNAR-A penetrators will be presented.

Yoshida S. Tanaka S. Hagermann A. Hayakawa M. Fujimura A. Mizutani H. Derivation of Globally Averaged Lunar Heat Flow from the Local Heat Flow Values and the Thorium Distribution at the Surface: Expected Improvement by the LUNAR-A Mission [#1571] The relationship between the Th abundance and the heat flow data of the Apollo sites and the LUANR-A sites, where the Th concentrations are in the wide range from 1 ppm to 6 ppm, will allow for a more precise estimation of the averaged heat flow value.

De Maria G. Brunetti B. Trionfetti G. Ferro D.

Ilmenite Reduction with H2 and CH4 in a Sound Assisted Fluidized Bed [#1624] Reduction of ilmenite with C~ has been investigated in the temperature range 1120-1250 K under different flow rates and pressure conditions, utilizing a gravimetric technique and a sound assisted fluidized bed. Results are comparatevely discussed.

Shiomi K. Yamazaki A. Yoshikawa I. Takizawa Y. Nakamura M. Observation of the Moon's Albedo with the Extreme Ultraviolet Scanner on the Mars Orbiter NOZOMI [#1432] The albedo of the Moon at wavelengths around 30.4 nm, in extreme ultraviolet range, was observed by an Extreme Ultraviolet scanner on the Mars orbiter NOZOMI for the first time, when the spacecraft approached the Moon.

Cosmic Dust

TaylorS. Lever J. H. Govoni J. A Second Collection of Micrometeorites from the South Pole Water Well [#1914] In 2000, we suctioned all visible material, including about 0.4 g of extraterrestrial material, from the bottom of the South Pole water well. The micrometeorites appear unweathered and their depositional age is approximately 700- 1100 AD.

Duprat J. Hammer C. Maurette M. Engrand C. Matrajt G. Immel G. Gounelle M. Kurat G. Search for Past and Future "Frozen" Leonid Showers in Antarctica and Greenland [#1641] We recovered micrometeorites from the surface snow of Dome C (Central Antarctica). Their sporadic flux is estimated. This work is part of a long-term program to collect micrometeorites from Leonid showers in Greenland and Antarctica.

112 ______32nd LPSC Program Toft B. Chambers J. Hassings R. Godwin A Schauer R. Ross A. DeBaer J. Melchior R. Annexstad J. Are Cosmic Spherules Found in Glacio genic Sediments? A New View of an Ongoing Investigation [#1360] Magnetic spherules that are possibly cosmic in origin are found in glaciogenic sediments that are outwash deposits.

Engrand C. Kettrup D. Duprat J. A Oxygen Isotopic Composition ofAncient Cosmic Spherules [#1567] The oxygen isotopic composition of cosmic spheres from a 1.4 Ga old sedimentary rock is compatible with that of modern cosmic spheres. Thus, either the Earth atmosphere was the same 1.4 Ga ago as it is now or these "old" spheres are actually modern.

Duprat J. Engrand C. Gounelle M. Maurette M. Matrajt G. Kurat G. Brandstatter F. Search for Possible Extraterrestrial Matter Among Shiny Small Iron Oxide Spherules [#1773] We performed oxygen isotopic analyses of 13 iron oxide spherules collected in Antarctica to find extraterrestrial spherules. One sample has a heavy oxygen isotopic composition suggesting an extraterrestrial origin. Other types may be from diesel engine fumes.

Flynn G. J. SuttonS. R. Horz F. Synchrotron X-Ray Microprobe In-Situ Trace Element Analysis of "Swarm" Particles Collected in Aerogel on the MIR Space Station: Evidence for a CI-like Composition [#1398] In-situ X-ray fluorescence analysis of 4 particles from a "swarm" of particles captured in aerogel on MIR shows they have approximately CI concentrations of Mn, Cr, Ga, Ge, and Se, but a low Zn content suggests thermal alteration during aerogel capture.

Raynal P. I. Quirico E. Borg J. d'Hendecourt L. Micro-Raman Survey ofthe Carbonaceous Matter Structure in Stratospheric IDPs and Carbonaceous Chondrites [#1341] The comparative study of the carbonaceous matter in ten IDPs (L2021D7/C8/B4 and L2036G15/I29/A4/ E25/Dl/D3/D6) and various carbonaceous chondrites, using Raman microspectrometry, shows the distinctiveness of IDP carbon and of the Orgueil meteorite.

Stephan T. Arndt P. Jessberger E. K. Klock W. Nakamura K. Maetz M. Rost D .. Thomas-Keprta K. L. Warren J. L. I. Wies C. Comprehensive Consortium Study of Interplanetary Dust Particles from Collector U2071 [#1267] This is a status report on a comprehensive consortium study to investigate dust particles from collector U2071. The primary idea of this study was to apply a series of analytical techniques to an entire set of particles avoiding any preselection.

Flynn G. J. Lanzirotti A. SuttonS. R. Comparison of Pyrrhotite from Interplanetary Dust and Meteorites: Evidence for Different Formation Environments [#1411] Five pyrrhotite-dominated IDPs, examined by X-ray microprobe, have Se contents averaging -1.6x theSe content of pyrrhotite from the CI meteorite Orgueil, indicating IDP pyrrhotite formed in a different environment than Orgueil pyrrhotite.

Rietmeijer F. J. M. Nuth J. A. III Serpentine by Hydrogenation of Fe-rich Ferromagnesiosilica PCs in Aggregate IDPs [#1219] Condensed hydrogen-bearing magnesiosilica smokes support that hydrogenation at Hz/H20 ratios may lead to the formation of rare Fe-rich serpentine plus metallic iron in ferromagnesiosilica PCs with appropriate (Mg,Fe)/Si ratios that were acquired during their formation.

32nd LPSC Program------113 Rietmeijer F. J. M. Nuth J. A. III Hallenbeck S. L. Heat-Treatment of MgSiO Smokes ofAstrophysical Interest: Possible Implications for Olivine-Pyroxene-Silica Assemblages in Chondritic Aggregate IDPs [#1322] Anhydrous silicates in coarse-grained ferromagnesiosilica PCs formed during atmospheric entry flash-heating also constrain the astromineralogy of astrophysical dust. This is because of the unique closed-system behavior of these PCs in chondrtitic aggregate IDPs.

Joswiak D. J. Brownlee D. E. Carbonate Mineralogy in Stratospheric IDPs: Compositions, Co-Existing Smectite and Comparison to CI Carbonaceous Chondrites [#1998] Breunnerite carbonates were studied in 6 stratospheric IDPs and show positive Fe/Fe+Mg correlation with their host smectites. Differences in carbonate chemistry between IDPs and CI chondrites suggest different crystallization environments.

Graham G. A. Butterworth A. L. Burchell M. J. Kearsley A. T. Creighton J. A. Mann J. Bland P. A. Cressey G. Jones C. G. Grady M. M. Wright I. P. Laboratory Capture, Isolation and Analysis of Microparticles in Aerogel: Preparation for the Return of Stardust [#1637] We present observations from the laboratory capture of particles in aerogel. The paper focuses on a possible extraction technique and the bulk mineral characterization of the captured material using non-destructive analytical techniques.

Hahn J. M. Zook H. A. Cooper B. Sunkara B. Mapping the Inner Zodiacal Light with Clementine [#1690] Images of the inner zodiacal light were acquired by the Clementine spacecraft while orbiting the Moon in 1994. An all-sky map of the inner zodiacal light is obtained, and the distribution of dust throughout the inner solar system will also be reported.

Naoi T. Sasaki S. The Nearest Approach Distance of Interstellar Dust to the Sun for Different Sizes [#1172] We calculate the charges of interstellar dust grain flowing into the solar system as a function of the heliocentric distance, and then decide the closest distance to the Sun that interstellar dust grain with radius range 10-0.01 mm can approach.

Kobatake H. Tsukamoto K. Yokoyama E. Satoh H. Y urimoto H. In Situ Investigation for the Origin of the Interplanetary Dust Particles Under Microgravity [#1550] IDPs have been synthesized under microgravity. The morphology and the chemical composition were studied by TEM, the result of which is similar to natural one. In situ measurement of temperature and the concentration around the melt was also employed.

Impact Crater Geology

Liu S. Glass B. P. Upper Eocene Impact Ejecta/Spherule Layers in Marine Sediments: New Sites [#2027] Upper Eocene impact ejecta/spherules were found from 5 new sites. Only unmelted impact ejecta were found at Site 1073A in the NW Atlantic Ocean. Cpx spherules and microtektites were found at the other 4 sites.

Simonson B. M. CardiffM. Schubel K. A. New Evidence that a Spherule Layer in the Late Archean Jeerinah Formation of Western Australia was Produced by a Major Impact [#1141] A newly discovered crop of an impact spherule layer proves it persists for >50 km and has 200+ mm of spherules. This confirms it is regionally extensive and produced by a large impact. It also contains rip-up clasts of sediment 0.5 meter long.

114 ______32nd LPSC Program MaP. Tonzola C. DeNicola P. Herzog G. F. Glass B. P. 10Be in Muong Nang-Type Australasian Tektites: Constraints on the Location of the Source Crater [#1351] In 18 Muong Nong-type tektites, concentrations ofBe-10 and of mineral inclusions anticorrelate. Be-10 is lowest and the source crater probably lies within a region between the southern Laotian border and the southwestern tip of Hainan Island, China.

Kettrup B. Deutsch A Masaitis V. L. Sr, Nd Isotope Composition of Impact Melt Coated Gneissbombs and Tagamites, Popigai Crater, Russia [#1290] Different types of melt coatings are thought to reflect compositional variations in the fireball. Chemical variations in the tagamite and suevite bodies probably reflect various contributions of different precursor lithologies to the melt sheet.

Glass B. P. Liu S. Leavens P. B. Discovery ofa Naturally-occurring, Shock-produced, High-Pressure Zircon Polymorph [#1155] Zircons that were converted to a high-pressure zircon polymorph with a scheelite structure have been discovered in an upper Eocene impact ejecta layer. This is the first time that this high-pressure phase has been found in nature.

Reimold W. U. Leroux H. Gibson R. L. TEM Analysis of Naturally Deformed Zircon from the Central Vredefort Dome [#1045] Naturally deformed zircon with optically visible planar microdeformation was examined by TEM, in order to investigate the nature of shock induced planar features in this refractory mineral.

Ivanov B. A Deutsch A Calcite Phase Diagram in Relation to Shock Decomposition [#1740] The phase diagram of calcite is updated using published experimental data and theoretical equation of state. Calcite decomposition seems to be strongly controlled by kinetic of CaO and C02 separation depending of their phase state.

Maruoka T. Koeberl C. Matsuda J. Syono Y. Carbon Isotopic Compositions of Shock-produced Diamonds [#1283] In order to study the pressure effect on the isotopic fractionation between diamond and graphite, we analyzed isotopic compositions of diamonds produced by shock experiments.

Miura Y. Uedo Y. Miklos M. Formation of Fe-Ni Particles by Impact Process [#2149] Fe-Ni mixed minerals are found in natural impact crater and artificial impact experiments, where large Ni-rich particles can be formed by impact process.

Verma H. C. Upadhyay C. Tripathi R. P. Tripathi A. Shukla A D. Bhandari N. Nano-sized Iron Phases at the K/J and PIT Boundaries Revealed by Mossbauer Spectroscopy [#1270] The Moss bauer spectroscopy reveals the presence of nano-particles of iron oxides/hydrooxide phases at the KIT and PIT mass extinction boundaries.

Morrow J. R. Sandberg C. A Distribution and Characteristics of Multi-sourced Shock-metamorphosed Quartz Grains, Late Devonian Alamo Impact, Nevada [#1233] New stratigraphic/geographic distribution and petrographic data on multi-sourced, shock-altered quartz from the Late Devonian oceanic Alamo Impact, Nevada, help to further constrain the excavation depth, location, and magnitude of the impact.

32nd LPSC Program------115 Morrow J. R. Sandberg C. A. Poole F. G. New Evidence for Deeper Water Site of Late Devonian Alamo Impact, Nevada [#1018] Discontinuous, off-platform deposits of the Alamo Breccia have a different pattern and character from the semicircular pattern of shoreward-thinning, extremely coarse to fine carbonate-platform deposits, and suggest filling of a deeper water crater.

Berczi Sz. Torok K. Gal-Solymos K. J6zsa S. Mien-Ramso Island Impact Melt Rock and Breccia: Origin of Vesicular Sharp Pebbles from the Ramso Island [#1078] The vesicular, "rhyolitic," glacial eolic erosion shaped "sharp pebbles" from theW. shoreline ofRamso Island, the central peak of Mien Crater Lake, Sweden, has impact melted texture, but some fragments preserved parts of the original granitic texture.

Poag C. W. Chesapeake Coring Team Drilling to Basement Inside the Chesapeake Bay Crater [#1203] In a new 635-m corehole to basement inside the Chesapeake Bay crater, the USGS documented an upward of crystalline basement, a disturbed decollement zone, slumped sedimentary megablocks, surgeback breccia, washback breccia, and a fallout layer.

Powars D. S. Gohn G. S. Catchings R. D. McFarland E. R. Bruce T. S. Johnson G. H. Izett G. A. Emry S. A. Edwards L. E. Deep Corehole and Seismic Reflection Data Provide Insights into Crater-filling Processes and the Hydrogeology of the Outer Margin of the Chesapeake Bay Impact Structure, Eastern Virginia Coastal Plain, USA [#2183] A 2,084-ft-deep corehole and 6.5-mi-long, high-resolution seismic reflection and refraction survey recently were completed as part of an ongoing investigation of the geology and hydrology of the Chesapeake Bay impact structure.

Buchanan P. C. Reimold W. U. Lithic Clasts in the Vredefort Granophyre [#1070] Some lithic clasts in the Vredefort Granophyre contain quartz grains with multiple sets ofPDFs. Some of these clasts contain melt pockets composed of micro lites in a glassy groundmass. Analysis of these features confirms extreme amounts of mixing.

Lana C. Gibson R. L. Kisters A. Reimold W. U. Structural Analysis of the Core of the Central Uplift ofthe Vredefort Impact Structure, South Africa [#1032] Structural analysis of the Vredefort basement shows that all deformation, except the pseudotachylitic breccias, is of Archean age and that the deformation styles are continuous across the alleged OGG-ILG boundary- not supporting the existence of a Vredefort discontinuity.

Dressler B. O. Reimold W. U. Sharpton V. L. Gibson R. L. Pseudotachylites in Central Parts of Impact Craters- Orientation and Timing of Emplacement [#1023] Results of detailed investigations of the provenance, distribution, and geometries of pseudotachylitic breccias in the Vredefort Dome and Slate Islands impact structures are discussed, with special reference to the formation processes of these breccias.

Therriault A. M. Grieve R. A. F. Cintala M. J. Impact Cratering: A Role in the Formation of the First Felsic Continental Crust? [#1905] Large impacts on Earth have generated pools of melt rocks. These early impact melts were deep, cooled slowly, and may have produced felsic differentiates in a "near-surface" environment, which may have played a role in the formation of continents.

116 ______32nd LPSC Program McHone J. F. Williams K. K. Shoemaker C. S. Roddy D. J. Space Shuttle Radar Images: Connolly Basin Impact Site, Western Australia [#2065] Connolly Basin is a well preserved 9 km dia impact structure in the Gibson Desert of Western Australia. Although its size and structure are subtle or invisible in the field, they appear distinct and prominent to spacebome imaging radar.

Reimold W. U. Ayres N. Hatton C. Thomas R. J. L. MasterS. Antoine L. A. G. A Possible Impact Structure in the Belinga Greenstone Belt of Northeast Gabon [#1016] An -7-km-diameter, near-circular structure with indications of raised rim and disturbed central terrane has been identified on radar imagery in the Belinga Greenstone Belt of northeast Gabon. This structure should be further investigated as a possible impact structure.

Meteoroids

Shuvalov V. V. Atmospheric Entry of Tunguska-like Meteoroids: 2D Numerical Model [#1124] 2D numerical model with radiation and ablation is used to study atmospheric entry of Tunguska-like meteoroids.

Shuvalov V. V. Artemieva N. A. Long-Term Disturbances of Ionosphere Caused by Tunguska-like Impacts [#1123] 2D and 3D numerical models are used to study the long time evolution of large scale ionospheric disturbances induced by Tunguska-like impacts.

Khazins V. M. Numerical Simulation of the Meteoroid Wake [#1266] A quasi-two-dimensional model for estimation of the wake dynamic parameters along a reasonably large segment of the meteoroid trajectory is proposed. Numerical simulation is demonstrated with an example of the Tunguska-like event.

Kosarev I. B. Nemtchinov I. V. Meteoroid Impacts Detection from an Orbiter Around the Airless Cosmic Body [#1544} The efficiency of the initial kinetic energy transformation into radiation is sufficient for detection of impacts onto the lunar surface. Lunar orbiter may detect impacts of meteoroids with the size about 20 times smaller than observations from the Earth.

Azovskiy A. N. Shuvalov V. V. The Influence of Meteoroid Shape on the Movement of Destroyed Meteoroid [#1052] When meteoroids penetrate into dense layers of atmosphere, in most cases they are broken on separated fragments, which form crater fields. And the shape of fragments can influence on their divergence very strongly.

Kozlov E. A. Teplov V. A. Kusina M.S. Grokhovsky V. I. Spherical Explosive Experiments with Iron Meteorites [#1057] The first results are presented with respect to the investigation of the spheres turned from the iron meteorites Chinga and Sikhote-Alin' after their spherical explosive compression of different intensity.

Bland P. A. Cintala M. J. Horz F. Cressey G. Survivability of Meteorite Projectiles- Results from Impact Experiments [#1764] An experimental impact study investigating the fragmentation of various projectiles, including meteorite, at speeds up to 1.8 km/s. The results have implications for the survivability of meteorites impacting planetary and asteroidal surfaces.

32nd LPSC Program------117 Impact Crater Geophysics

Glass B. J. Lee P. Airborne Geomagnetic Investigations at the Haughton Impact Structure, Devon Island, Nunavut, Canada [#2155] This investigation created a broad magnetic map of the 23 Ma Haughton impact structure, in order to characterize its geomagnetic signature.

Gohn G. S. Bruce T. S. Catchings R. D. Emry S. R. Johnson G. H. Levine J. S. McFarland E. R. Poag C. W. Powars D. S. Integrated Geologic, Hydrologic, and Geophysical Investigations of the Chesapeake Bay Impact Structure, Virginia, USA: A Multi-Agency Program [#1901] The Chesapeake Bay impact structure is the focus of an ongoing federal-state-local research program. Recent core drilling and geophysical surveys address the formative processes and hydrogeologic properties of this major "wet- target" impact.

Catchings R. D. Powars D. S. Gohn G. S. Goldman M. R. Gandhok G. Johnson G. H. Subsurface Images of the Annular Trough of the Chesapeake Bay Impact Stucture, Virginia from Seismic Reflection/Refraction Data [#1937] Seismic images of the Chesapeake Bay Impact Crater, York-James Peninsula, Virginia are shown with correlations from borehole logs along the seismic profiles.

Christeson G. L. Morgan J. V. M. R. Deep Three-Dimensional Structure of the Chicxulub Impact Crater [#1728] We present the results of a wide-angle seismic survey conducted over the Chicxulub impact crater in 1996. Our three-dimensional modeling identifies stratigraphic uplift, Moho uplift, and regional basement structure.

Ortiz-Aleman C. Urrutia-Fucugauchi J. Pilkington M. Three-Dimensional Modeling ofAeromagnetic Anomalies over the Chicxulub Crater [#1962] The analytic signal method in 3D is applied to the magnetic field data over the Chicxulub crater. In a second stage, source locations are used as a priori information in the construction of a prism-like magnetic configuration model.

Carbonaceous Chondrites

Brearley A. J. Abreu N. M. In Situ Observation of Carbonaceous Material in the Matrices of CV and CM Carbonaceous Chondrites: Preliminary Results from Energy Filtered Transmission Electron Microscopy [#1461] Energy filtered transmission electron microscopy shows that organic matter can be detected in situ in the matrices of carbonaceous chondrites at a spatial resolution of at least 1 nm. In CM chondrites, carbon is often associated with sulfide particles.

Chizmadia L. J. Brearley A. J. Petrographic Studies of Fine-grained Rims in the Yamato 79I I98 em Carbonaceous Chondrite and Comparison to Murchison and ALH81002 [#1906] Fine-grained rims in Y791198 (CM2) have been studied in detail using SEM and EPMA techniques. In comparison with the more highly altered CM chondrite, ALH 81002, the rims are texturally and compositionally more heterogeneous.

Romstedt J. Jackel A. Micro-Magnetic Properties of Selected Mineral Grains in Primitive Meteorites [#1687] Optically opaque phases from the CV Chondrite Vigarano were investigated by magnetic force microscopy. The detection limit of small magnetic grains is below 200 nm. Different signal strengths could be detected for various mineral groups.

118 ______32nd LPSC Program Hoffman E. Housley R. M. Bland P. A. Seifu D. Oliver F. W. Fe- rich in Allende Bulk Samples and Separates: Mossbauer Spectroscopic Analysis [#2116] Allende separates contain pentlandite of unusually high Fe:Ni ratio. Moss bauer spectra show clear evidence of this phase.

Saylor J. Zolensky M. E. Bodnar R. J. Le L. Schwandt C. Fluid Inclusions in Carbonaceous Chondrites [#1875] Fluid inclusions are present in carbonaceous chondrites. Of the chondrites studied (Cil, CMland2, CV3) fluid inclusions were found only in CM2s and Cils, and by extrapolation are most likely to be found there in the future.

Botta O. Glavin D.P. Kminek G. Bada J. L. Classification of Carbonaceous Meteorites Through Amino Acid Signatures? [#1245] An overview of the amino acid composition of all carbonaceous chondrites analyzed in our lab will be presented, including the CMs Murchison, Murray, Nogoya, the CIs Orgueil and Ivuna, the CR Renazzo and the CV3 Allende.

Petaev M.l. lvanova M.A. Nazarov M.A. Wood J. A. Al-rich Clinopyroxenes in the CH Chondrite NWA 470: Condensates from Fractionated Nebular Systems [#1445] Clinopyroxenes with very different Al20 3 contents coexist in two CAis and a euhedral pyroxene grain of the CH chondrite NWA 470. These clinopyroxenes apparently formed by condensation from fractionated nebular systems.

Meteorites: Isotopic and Elemental Variations and New Analytic Techniques

Hua X. WangJ.H. HussG.R. SharpT.G. BuseckP.R. Si-Isotopic Fractionation in Silicate Minerals from Chondritic Meteorites: A Possible New Probe for Early Solar System Processes [#1852] Large Si-isotopic variations were found in our SIMS measurements of individual silicates from chondritic meteorites. If these variations are real, SIMS measurements of Si isotopes will provide an important new probe into early solar system processes.

Kehm K. Alexander C. M. O'D. HauriE. H. High Precision Iron Isotope Measurements by Multi-Collector ICP-MS [#1932] We are developing a precise technique for iron isotope analysis that uses 'cool' plasma ICPMS. Four bulk samples of chondritic meteorites analyzed by this method give similar 5Td4Fe and 58Fe/54Fe ratios as iron measured in a terrestrial basalt.

Mullane E. T. F. D. RussellS. S. D. Hortswood M. Parrish R. R. Copper and Zinc Stable Isotope Compositions of Chondrules and CAis: Method Development and Possible Implications for Early Solar System Processes [#1545] Using MC-ICP-MS to measure Cu-Zn isotope fractionation, we aim to determine their chondrule and CAl systematics, to delineate early solar system processes. We introduce a new method using Ga, to monitor mass-bias, enabling concurrent Cu-Zn analyses.

Luck J. M. Ben Othman D. Barrat J. A. Albarede F. Cu and Zn Isotopic Variations in Meteorites [#1688] Cu and Zn isotopic variations, measured on Plasma 54, are reported for meteorites of various classes and groups. They are around the perrnil and relate to redox, temperature, volatility, parent-body alteration and/or metamorphic conditions.

32nd LPSC Program------119 Bland P. A. Cressey G. Modal Mineralogy of Unequilibrated Chondrites by X-Ray Diffraction and Mossbauer Spectroscopy [#1853] We utilise an X-ray diffractometer with a fixed diffraction geometry to record an X-ray pattern from Allende, and standard mineral samples, stripping out peaks associated with known CV phases to quantify the complete modal mineralogy of the meteorite

Kashiv Y. Cai Z. Lai B. SuttonS. R. Lewis R. S. Davis A. M. Clayton R.N. Fellin M. J. Synchrotron X-Ray Fluorescence: A New Approach for Detennining Trace Element Concentrations in Individual Presolar SiC Grains [#2192] Synchrotron X-ray fluorescence (SXRF) is a new non-destructive approach for determining trace elements' concentrations in individual presolar SiC grains. We report here on first measurements of chemical composition of 15 individual grains by this method.

New Meteorites

Patsch M. Weber H. W. Schultz L. Noble Gas Investigations of New Meteorites from Africa [#1526] Sixteen new meteorites from Africa were analyzed regarding the light noble gases: nine HEDs, one ureilite, three carbonaceous chondrites, two ordinary chondrites and one .

Annexstad J. O. Probst L. A Prolific Meteorite Stranding Surface: The Allan Hills Revisited [#1378] Antarctic meteorite stranding surfaces and complex ice emergent mechanisms.

Tonui E. K. Zolensky M. E. Mineralogy and Petrology ofYamato 86029: A New Type of Carbonaceous Chondrite [#1248] Y-86029 resembles CI chondrites. Its matrix is very fine-grained. Olivine shows evidence of shock, which has rarely been observed in carbonaceous chondrites. Y -86029 experienced aqueous and thermal alteration during or after accretion in parent body.

Barrat J. A. Gillet Ph. Jambon A. Sautter V. Javoy M. Petit E. Lesourd M. News from the Moon and Mars: Preliminary Examinations ofTwo New Saharan Finds [#1317] We report on the discovery of two Saharan finds: a lunar basalt and a basaltic shergottite. The petrographical and geochemical features of these two stones will be presented.

Righter K. Petrography, Mineralogy and Petrology of Two New HED Meteorites: GRA98I 08 and GRA98030 [#1765] Two new HED meteorites are described. GRA98108 is an olivine-bearing diogenite at the Mg-rich end of the diogenite clan. GRA98030 is a howardite with 30% eucritic and 70% diogenitic clasts, and contains an MgO-rich

and CaO- and Al20rpoor glassy spherule.

Ivanova M.A. Petaev M. I. Clayton R.N. Mayeda T. K. Hutcheon I. D. Nazarov M.A. Taylor L.A. WoodJ. A. NWA 470, a New CH Chondritefrom the Moroccan Sahara [#1817] NW A 4 70, a new meteorite discovered in the desert of Morocco, is classified as a CH chondrite.

Yoneda S. Ebihara M. OuraY. Okada A. Kusakabe M. Nakamura T. Nagao K. Naraoka H. Sayama Meteorite: A New CM Chondrite Fall in Japan with Highly Aqueously Altered Textures [#2034] We report a new CM chondrite fall in Japan. The Sayama meteorite, a 430 g stone, fell at Sayama-city on or about April29, 1986. SEM studies show that Sayama experienced extensive aqueous alteration than normal CM2.

120 ______32nd LPSC Program Ponganis K. V. Lavielle B. Spettel B. Buchwald V. F. Nishiizumi K. Caffee M. W. K. A New JAB Iron Meteorite from China [#1801] An iron mass was found -8 krn NW of Zhongshan, China. Petrographic data and a preliminary N isotopic analysis classify the iron as a lAB/III CD type. An exposure age of >440 Ma is inferred and measurements of radionuclides are in progress.

Ordinary and Enstatite Chondrites

Perron C. Bourot-Denise M. Oxygen Isotopes in the Sahara 97096 EH3 Chondrite [#2187] O isotopic composition has been measured with an ion microprobe in various components of the EH3 chondrite Sahara 97096 (reduced and oxidized pyroxene, olivine). One barred olivine chondrule plots in the carbonaceous chondrite domain.

Menzies O. N. Bland P. A. Berry F. J. An 57Fe Mossbauer Study of the Olivine Solid Solution Series: Implications for and Deconvolution of Unequilibrated Chondrite Spectra [#1622] The olivine solid solution series was investigated by 57Fe Mossbauer spectroscopy. The study aims to improve interpretation of meteorite spectra and provide a rapid method of characterizing silicate chemistry and degree of equilibration in chondrites.

Weber H. W. Schultz L. Noble Gases in Five Rumuruti Chondrites [#1500] Concentration and isotopic composition have been measured in five new R-chondrites: Dar al Gani 417, Northwest Africa 053, Ouzina, Sahara 98248, and Sahara 99531. Two of these meteorites contain solar trapped gases, NWA 053 has an unusual short exposure age of 0.2 Ma.

Friedrich J. M. Lipschutz M. E. How Do ULL Chondrites Relate to L and LL Fails? [#1198] Provisionally our ICPMS results, when treated by cluster analysis, suggest L/LL chondrites constitute an individual group. We found it interesting that bulk REE contents in the L/LL chondrite suite seem enriched relative to the L and LL suites.

Garrison D. H. Bogard D. D. 39Ar- 40Ar and Space Exposure Ages of the Unique Portales Valley H-Chondrite [#1137] The space exposure age of the unique Portales Valley H-chondrite is -40-45 Myr. The 39 Ar-40Ar ages of two samples are 4.477 ± 0.016 and 4.46 ± 0.02 Ga and show no evidence of more recent disturbance, in contrast to previous radiometric determinations.

Rotenberg E. Arne lin Y. Combined Initial Sr, Sm-Nd, and U-Pb Systematics of Chondritic Phosphates: How Reliable are the Ages? [#1675] We report here combined initial Sr, Sm-Nd, and U-Pb data from chondritic phosphates in order to evaluate the suitability of the initial Sr method for determining the ages of these meteorites.

Shock Processes in Meteorites

Buchanan P. C. Reimold W. U. Kruger F. J. Flow Differentiation in a Melt Vein in the L6 Chondrite PCA82528 [#1071] Flow differentiation of rock and mineral fragments in a relatively wide melt vein in the Antarctic L6 ordinary chondrite PCA82528 suggests that melt moved significant distances from the source area.

32nd LPSC Program------121 See T. H. Horz F. Cintala M. J. Experimentally Produced Shock Melts in Impact-comminuted Powders of an L6 Ordinary Chondrite [#1807] Shock-recovery experiments using L6 ordinary chondrite (ALH85017) were conducted to investigate the formation of impact melts as a function of shock pressure and to assess the significance of shock-melting as a regolith process on asteroids.

Xie X. Minitti M. E. Chen M. Wang D. Mao H. K. Shu J. Fei Y.

A High-Pressure Phase ofCaiP04h in the Shock Melt Veins of the Suizhou Meteorite [#1358] We have discovered and experimentally confirmed the presence of a high-pressure polymorph of Ca3(P04h in the Suizhou meteorite. The high-pressure Ca3(P04h polymorph in Suizhou likely represents the first naturally occurring example of this phase.

Xie Z. Tomioka N. Sharp T. G. High-Pressure Phases in Shock-induced Melt Veins from the Umbarger L6 Chondrite: Constraints on Shock Conditions [#1805] The Umbarger L6 chondrite contains previously unknown high-pressure phases: ringwoodite, (MgSiOT ilmenite), augite, and hollandite phase. Crystallization of akimotoite suggests supercooling of the melt vein during adiabatic decompression.

Iron Meteorites

Chabot N. L. Campbell A. J. Humayun M. Agee C. B. A Henry's Law Test for Experimental Partitioning Studies of/ron Meteorites [#1738] Low-level doped solid metal/liquid metal experiments analyzed by laser ablation ICP-MS allow Henry's Law to be tested. The results indicate Henry's Law is obeyed and the experimental partition coefficients can be applied to iron meteorites.

Leya I. Wieler R. Herzog G. F. Schnabel C. MaP. Helium, Neon, and Argon in Canyon Diablo Spheroids [#1720] Despite having melted when they formed, many Canyon Diablo spheroids retain cosmogenic 38 Ar. The concentrations imply that the spheroids' precursor material mostly came from a shell -1 m thick centered at a depth of -1.2 m in the impactor.

Miura Y. Uedo Y. Iron Spherules and Melted Fragments Found at Rice-Field ofNio Meteorite Shower Site in Yamaguchi, Japan [#2075] From compositional and textural data, fragments of the Nio meteorite with fusion crust have been found at wet rice- field of deeper layer at Nio meteorite shower site in Japan.

Skala R. Cisarova I. Crystal Structure of from the Meteoritic Iron Sikhote A lin [#1564] The crystal structure refinement of a prismatic crystal of schreibersite from the meteorite Sikhote Alin is presented. Results indicate non-equal occupation of sites by Ni and Fe with nickel concentrated dominantly in a single atomic site.

Planetary Formation and Early Evolution

Anderson S. W. Stofan E. R. McColley S. Smrekar S. E. Pressure Distribution in Inflated Lava Flows [#1683] There has been considerable debate regarding the role of inflation in terrestrial and planetary lava flow emplacement. We used a tumuli growth model to estimate the pressure within Hawaiian lava flows to better understand inflation processes.

122 ______32nd LPSC Program Socki R. A. Romanek C. S. Gibson E. K. Jr. Golden D. C. Terrestrial Aufeis Fomwtion as a Martian Analog: Clues from Laboratory-produced C-I3 Enriched Cryogenic Carbonate [#2032] Cryogenic calcite was produced to mimic aufeis and used as a martian analog. Presumably, aufeis could occur in V- shaped valleys on Mars, provided enough bicarbonate-rich liquid water exists or has existed in the past, most likely as frozen discharging groundwater springs.

Rossi A. P. Marinangeli L. Geological Evolution of the Lake Abhe Tectonic Basin Using Multitemporal Satellite Images [#1515] An analysis of multispectral and multi temporal images covering the Lake Abhe region (Djibouti) was performed. Both sedimentary and structural aspects were studied in order to reconstruct the recent geological evolution of the basin.

Gilpin L. A. Bertka C. M. Minitti M. Fei Y. Melting ofa Model Orthopyroxene-rich Martian Mantle at 2.0 GPa [#1717] We determined martian bulk compositions consisting of carbonaceous, ordinary and enstatite chondrite mixtures that satisfy martian geophysical constraints. Mineralogy and melting relations of the martian mantle compositions were also investigated.

Choblet G. Sotin C. Grasset O. Early Transient Cooling of Mars [#1646] Thermal aspect of Mars early history. Convective cooling beneath a rigid lid presents an initial transient period. Estimates of the duration for this period for Mars vary from a few 100 Ma to several Ga, depending on initial thermal conditions.

Shearer C. K. Righter K. Hafnium and Tungsten Partitioning in Silicates. A Key to Understanding the Earth Evolution of Both the Moon and Mars [#1620] We present data on the behavior of both Hf and Win a variety of silicates and melt compositions and evaluate their role in generating W isotopic signatures.

Lauer H. V. Jr. Jones J. H. Schwandt C. S. Influence of Carbon and Sulfur on the Partitioning of Tungsten Between Solid and Liquid Metal [#1948] To give some insight into C-bearing experiments, we performed a set of experiments investigating the partitioning ofW between solid metal and liquid metal in Fe-Ni-C-S systems.

Draper D. S. Chabot N. L. Xirouchakis D. Wasserman A. A. Agee C. B. Partitioning ofNd, Tb, Lu, and Hf Between Gamet and Ordinary Chondrite Melt at 5 to 9 GPa: Applications to Martian Differentiation [#1681] One explanation for AI and REE depletions in SNC meteorites is early fractionation in a deep martian magma ocean. We report initial results from an experimental investigation of partitioning between majoritic garnet and ordinary chondrite liquid.

Satoh J. Ohtani E. Distribution Coefficients of Transition Metal Elements Between Metallic Iron and Lower Mantle Minerals [#1506] Transition metal element partitioning experiments between lower mantle minerals and metallic liquid were made in alumina containing system, and effect of alumina content in perovskite on distribution coefficients were clarified.

Swindle T. D. Cataclysm + Cold Comets = Lots ofAsteroid Impacts [#1466] The existence of the lunar cataclysm, coupled with the observation of argon in Comet Hale-Bopp, has implications for the mechanism of the cataclysm, the source of Earth's water, and the type of objects causing most impacts through Earth history.

32nd LPSC Program------123 Hurford T. A. Greenberg R. Tidal Amplitude for a Self-Gravitating, Compressible Sphere [#17 41] We derive Love numbers for a self-gravitating, compressible sphere.

Nakano H. Kouchi A. Experiments on Evaporation Metamorphism of Interstellar Organic Materials [#1704] We experimentally determined the distribution of interstellar organic materials in the protosolar nebula and discussed C,N-contents of carbonaceous chondrites.

Kudo T. Kouchi A. Arakawa M. Watanabe N. Maeno N. Sirono S. Riga M. Effect of Organic Matter on the Coagulation of Grains [#1273] Results of collision experiments show that millimeter-sized organic grain aggregates stuck more effectively than silicate and ice to form larger aggregates even at the turbulent stage of the protosolar nebula.

Yakshinskiy B. V. Madey T. E. Electron- and Photon-stimulated Desorption ofAlkali Atoms (Na, K) from Water Ice and Surfaces [#1896] Based on laboratory studies, we conclude that photon-stimulated desorption of Na and K from surfaces by UV photons is a dominant source process for these alkalis in tenuous planetary atmospheres.

Astrobiology II: Melting Pot

Meyer M. A. Lavery D. B. Astrobiology Science and Technology: A Path to Future Discovery [#1956] The Astrobiology Program is described. However, science-driven robotic exploration of extreme environments is needed for a new era of planetary exploration requiring biologically relevant instrumentation and extensive, autonomous operations on planetary surfaces.

Sharp Z. D. Durakiewicz T. Papike J. J. The Effect of Thermal Decarbonation on Stable Isotope Compositions of Carbonates [#2024] C-0 isotope ratios of C02 evolved during thermal decarbonation of Cc and Dol are unfractionated. Large fractionations occur for Sid, due to auto-oxidation of Fe and CO generation. Decarbonation does not explain the isotope variability in ALH8400 1.

Warmflash D. M. Clemett S. J. McKay D. S. Organic Matter in SNC Meteorites: Is It Time to Re-Evaluate the Viking Biology Experimental Data? [#2169] New data from SNC meteorites suggests that organic material may be present in the martian upper crust. This adds to possibility that the Viking biology experiments my have plausible biological interpretations as well as inorganic chemical interpretations.

Rozanov A. Yu. Hoover R. Biomorphes in Carbonaceous Chondrites [#1278] In the meteorites- Murchison, Efremovka, Murray, Nagoya etc.- was found biomorphic structures like cyanobacteria and other microorganisms.

Glavin D.P. Bada J. L. Botta O. Kminek G. Grunthaner F. Mathies R. Integrated Micro-Chip Amino Acid Chirality Detector for MOD [#1442] Integration of a micro-chip capillary electrophoresis analyzer with a sublimation-based extraction technique, as used in the Mars Organic Detector (MOD), for the in-situ detection of amino acids and their enantiomers on solar system bodies.

124 32nd LPSC Program Kanik I. Beegle L. W. Hill H. H. Ultra High-Resolution Electrospray Ionization/Ion Mobility Spectrometer System for In-Situ Detection of Organic Compounds [#2090] The potential of the high-resolution Electrospray Ionization/Ion Mobility Spectrometry (ESIIIMS) technique as analytical separation tool in analyzing bio-molecular mixtures in the search for the chemical signatures of life is demonstrated.

Beegle L. W. Kanik I. A High-Pressure Hollow Cathode Ionization Source for In-Situ Detection of Organic Molecules [#2139] We have designed, constructed and characterized a new high-pressure (1-5 Torr) hollow cathode discharge source (HCDS) that can be utilized as an ionizer in a wide variety of mass analyzers.

Steele A McKay D. S. Allen C. Thomas-Keprta K. Warmflash D. Pincus S. Schweitzer M. Priscu J. Sears J. Hedgecock J. Avci R. Fogel M. Mars Immunoassay Life Detection Instrument for Astrobiology (MILD/) [#1684] We outline the development of a new breed of robotic life detection instruments based on immunological reactions.

Allen C. Westall F. Scheible R. Astrobiology Investigations at a Martian Hematite Site [#1020] Current lander instruments are well suited to analyze the aqueous and geologic history and macroscopic evidence of ancient life in a hematite deposit. Such a deposit, with indications of past life, would be a prime site for future sample return.

Longazo T. G. Wentworth S. J. McKay D. S. Southam G. Clemett S. J. Olivine Weathering: Abiotic Versus Biotic Processes as Possible Biosignatures [#2013] A preliminary study to determine how abiotic versus biotic processes affect the weathering of olivine cystals. Perhaps the differences between these weathering processes could be used as biosignatures.

Guidry S. A Chafetz H. S. Geometries and Distributions in Yellowstone's Siliceous Hotsprings: Implications for Martian Exploration [#1083] Synthesis of features from several siliceous hotsprings yields a relatively simple facies model. This model facilitates our ability to recognize these hotsprings in the terrestrial and probably extraterrestrial rock record.

Allen C. Grasby S. Longazo T. Sulfur/Carbonate Springs and Life in Glacial Ice [#1019] Glacial springs are useful analogs to channels and seeps issuing from frozen strata on Mars. Mineralized water can move through, and discharge from, solid ice. This water, even near freezing, can support microbial life and bring it to the surface.

Byrne M. Morris P. A Wentworth S. J. Thomas-Keprta K. L. BrigmonR. L. McKay D. S. Biogenic Structures from a Hypersaline Lake in the Bahamas [#1068] A diversity of biogenic structures is described from Storr's Lake, Bahamas. Structures include four groups of coccoid structures, diatoms and probable cyanobacterial sheaths.

Morris P. A Wentworth S. J. Thomas-Keprta K. L. Allen C. C. McKay D. S. Probable Carbonate Fossilization Processes Within Dead Sea Microbial Remains [#1067] Microbial fossilization processes in the Dead Sea is primarily associated with the calcium cation. The putative fossilized microbes do not represent the reported living microbial population.

32nd LPSC Program------125 Hasiotis S. T. BrakeS. S. Dannelly H. K. Duncan A. Eukaryote-Dominated Microbial Communities That Build Iron-Stromatolites in Acid Mine Drainage, Western Indiana: An Analog for Proterozoic Banded Iron Formations and Oxygenation of the Early Atmosphere? [#2091] Eukaryote-dominated microbial communities build iron-rich stromatolites in acid mine drainage at several reclaimed coal mine sites in western Indiana, which can serve as an analog for Proterozoic iron-rich deposits and the oxygenation of the early atmosphere.

Pun A. Papike J. J. Shearer C. K. Carbonates of the Gunflint Banded Iron Formation as Analogs of Martian Carbonates [#1331] Terrestrial iron formations preserve remnants of life on Earth and may serve as analogs for identifying evidence of biologic activity in martian rocks. We report on the petrography, mineralogy and trace-element abundances of carbonates of the Gunflint banded iron formation.

Tajika E. Physical and Geochemical Conditions Required for the Initiation ofSnowball Earth [#1573] Condition for initiation of snowball Earth phenomena is studied by using a one-dimensional energy balance climate model and carbon geochemical cycle model. Critical condition for pC02 to cause climate instability will be discussed.

Cockell C. S. Horneck G. Wynn-Williams D. D. Ultraviolet Protection on a Snowball Earth [#1328] Habitats in the Antarctic provide an insight into habitats available on snowball earth. Physical UV protection on snowball earth would have been dominated by the manifestations of ice and snow in different habitats. The snowball period was a golden age of UV protection.

Simakov M. B. The Possible Sites for Exobiological Activity on Titan [#1514] All conditions needed for exobiology -liquid water, complex organic chemistry and energy sources for support of biological processes are on Saturnian moon. There are several appropriate sites for biological and/or prebiological activity at present day on Titan.

Small-Body Goulash

Nakamura K. Sasaki S. Hamabe Y. Kurahashi E. Hiroi T. Laboratory Simulation of Space Weathering: A Transmission Electron Microscopic Study- Microstructures of the Laser Irradiated Samples [#1547] The microscopic characteristics in the simulation samples are linked to optical property change and formation of nanophase iron in the vapor deposited rim of grains.

Korycansky D. G. Asphaug E. Shaping Asteroids Via Small Impacts [#1433] We report preliminary results of an investigation into the effects of small impacts on the shapes and regolith distribution of small asteroids. The accumulated effects of a number of such impacts can potentially drive bodies to non-axisymmetry.

Spitale J. N. Greenberg R. Numerical Evaluation of the Yarkovsky Effect on ofAsteroids [#1346] To evaluate theY arkovsky acceleration under a wide range of conditions, a three-dimensional finite-difference solution to the heat equation is applied to small spherical stony bodies of various diameters, with and without an insulating regolith.

Leake M.A. Nogues J.P. Gaines J. K. Looper J. K. Freitas K. A. Low-Resolution Spectroscopy of Primitive Asteroids: Progress Report for SARA/VSU Survey [#2120] Progress on a low-resolution survey of primitive C-class asteroids continues using new equipment (and its associated problems) to understand aqueous alteration in the solar system.

126 ______32nd LPSC Program Howell E. S. Rivkin A. S. Vilas F. Soderberg A. M. Aqueous Alteration in Low Albedo Asteroids [#2058] We observe the 3 micron water/OH band and the 0.7 micron phyllosilicate band. We commonly find rotational variation and that the 0.7 micron band indicates hydrated silicates, but its absence does not imply a lack of hydrated silicates.

Hildebrand A. R. Carroll K. A. Balam D. D. Cardinal R. D. Matthews J. M. Kuschnig R. Walker G. A. H. Brown P. G. Tedesco E. F. Worden S. P. Burrell D. A. Chodas P. W. Larson S.M. Spahr T. B. B. J. The Near-Earth Space Surveillance (NESS) Mission: Discovery, Tracking, and Characterization ofAsteroids, Comets, and Artificial Satellites with a Microsatellite [#1790] The Near-Earth Space Surveillance (NESS) Mission, a microsatellite dedicated to observing near-Earth (NEO) and interior-to-the-Earth (IEO)asteroids and comets plus artificial satellites, is currently being studied under contract to the Canadian Space Agency.

Weidenschilling S. J. Marzari F. Davis D. R. Neese C. Origin of the Double Asteroid 90 Antiope: A Continuing Puzzle [#1890] Asteroid 90 Antiope is binary, with widely separated equal-mass components. Its high angular momentum may be due to a low-velocity impact among Themis family members, but the probability of such a collision is low, suggesting it is unique.

Emery J.P. Brown R. H. Near-Infrared Spectroscopy of Trojan Asteroids: Implications for the Evolution of the Solar System [#1385] We will present new near-infrared spectroscopic observations of trojan asteroids.

Lederer S.M. Campins H. Modeling Coma Gas Jets in Comet Hale-Bopp [#1421] We present an analysis of OH, CN, and C2 jets observed in Comet Hale-Bopp. The relative contributions from and composition of the coma gas sources, and the parameters describing the active areas responsible for the gas jets will be discussed.

Stooke P. J. Ford H. A. Gaspra: Revised Crater Counts [#1073] Previous crater counts for Gaspra were made in restricted areas and did not incorporate low resolution images or large depressions. We present new counts using different assumptions and find an old surface saturated at diameters over 1 km.

32nd LPSC Program------127 Friday, March 16, 2001 ASTROBIOLOGY III: FEET ON THE GROUND 8:30 a.m. Room A

Chairs: F. Westall P. J. Boston

Guidry S. A.* Chafetz H. S. Westall F. Microfabrics in Siliceous Hotsprings: Yellowstone National Park, Wyoming [#1082] Microfabrics shed light on the mechanisms governing siliceous sinter precipitation, the profound effects of microorganisms, as well as a conventional facies model for siliceous hotsprings.

Prieur D. M. * Metabolic Diversity and Physiological Adaptations of Deep-Sea Hydrothermal Vent Prokaryotes: Lesson for Astrobiology [#1191] Among extreme environments on Earth, deep-sea hydrothermal vents represent models for the study of metabolic diversity of prokaryotes and some physio-chemical limits for life as well, and serve as refemeces for search of life in and out the solar system.

Boston P. J. * Spilde M. N. Northup D. E. Melim L.A. Cave Microbe-Mineral Suites: Best Model for Extraterrestrial Biosignatures! [#2015] Microbial/mineral biosignature suites derived from cave microorganism and mineral associations provide an excellent model for developing search strategies. These suites combine macroscopic, microscopic, and chemical signatures.

Spilde M. N. * Brearley A. J. Papike J. J. Mn-Oxide Minerals from a Terrestrial Cave Environment: Biomarkers for the Search for Life on Mars? [#1454] Mn-oxides are promising biomarkers because microbes greatly accelerate Mn-oxide formation rates and produce distinctive oxidation states. Mn minerals in terrestrial caves form subaerially and could conceivably be present in the subsurface of Mars.

Cockell C. S. * Brandt D. Hand K. Lee P. Microbial Mats of the Tswaing Impact Crater: Results of a South African Exobiology Expedition and Implications for the Search for Biological Molecules on Mars [#1340] We describe microbial mats from the Tswaing impact crater in South Africa. The mats provide insights into the unique biological characteristics of impact craters and can help strategies for the search for biomolecules on Mars.

Folk R. L. * Taylor L. A. Nazarov M.A. Similarity of Nanometer-size Spheroids in Martian Meteorite Dhofar 019 and Enclosing Caliche Soil: South-Pole vs. Desert Form [#1777] Similar to other martian meteorites found in hot deserts, nanometer-scale ovoids found within the caliche on the outside ofDhofar 019 appear to be identical in size and morphology to those in the meteorite proper. Nano forms are similar to those reported from ALH 8400 1.

Westall F.* Walsh M. M. Scheible R. Toporski J. Steele A. Identifying Potentially Badly Degraded Microfossils from Mars [#1434] The majority of the early terrestrial microfossils are badly degraded and to some extent some degradation is additional evidence of biogenicity. Potential martian microfossils are also likely to occur in degraded form and it is imperative that we be able to recognize them.

Scheible R. T. * Westall F. Allen C. C. Brearley A. J. Hematite Mineralized Bacterial Remnants: Implications for Martian Hematite Deposits [#1438] Hematite mineralized bacterial remnants in the Gunflint Formation [early Proterozoic] can be used as an analog for potential microfossils in martian iron deposits.

128 ______32nd LPSC Program Moreau J. W. * Sharp T. G. Mineralogical, Microstructural and Chemical Biosignatures of Microfossils: An Electron Microscope Study [#1797] Mineral biosignatures were found in terrestrial microfossils at nanometer scales with transmission electron microscopy. These biosignatures exhibit characteristics consistent with nucleation of opaline silica on bacterial substrates during fossilization.

Milliken K. L. * Endolithic Microbial Communities in Fractures: Insights Gleaned from Mineralized Filaments in Cretaceous-age Calcite Veins in Serpentinized Peridotites, Iberia Abyssal Plain [#1010] The occurrence of diverse mineralized microbial features in calcitized fractures in serpentinized peridotite, Iberia Abyssal Plain, suggests that mineralized fractures are of particular interest in the search for fossil or extant life on Mars.

Schieber J. * Finding Life on Mars: A Mudrock 's Perspective [#1072] Mudstones should be abundant in the martian rock record. On Earth, mudstones contain sedimentary pyrite grains with enclosed microbial remains. There is a potential to find evidence for life in sedimentary pyrite of martian mudstones.

Moorbath S. * A Geochronological Re-Evaluation of Claims for the Contemporaneity of Earliest Life with Major Impacts [#1608] Re-evaluation of the ages of Greenland rocks containing the oldest isotopic evidence for life shows that they are :5.3.7 Ga, not> 3.85 Ga, postdating heavy bombardment.

Greenberg R. * Tufts B. R. Geissler P. Hoppa G. V. Life on Europa: How Tidal Processes Create Suitable Environments [#1800] Europa's crust may be one of the most likely and accessible places for us to find extra-terrestrial life, due to the character of diverse linkages between the ocean and the surface.

32nd LPSC Program------129 Friday, March 16, 2001 METEORITES: COMPOSITION, CHRONOLOGY, AND COSMOGENIC NUCLIDES 8:30 a.m. Room B

Chairs: D. A. Papanastassiou G. F. Herzog

Liu M. * Scott E. R. D. Keil K. Wasson J. T. Clayton R.N. Mayeda T. Eugster O. Crozaz G. Floss C. Northwest Africa 176: A Unique Iron Meteorite with Silicate Inclusions Related to Bocaiuva [#2152] NWA 176 is a unique iron meteorite with 40 vol.% silicates of chondri tic composition that is closely related to the Bocaiuva iron. Both contain rounded silicate clasts 1-10 mm in size and might be strongly metamorphosed, metal-rich chondrites.

Takeda H.* Ishii T. Otsuki M. Mineralogy of Inclusions in the and Mont Dieu Irons and Segregation of Partial Melts [#1183] To find partial melt segregation, we studied two new irons. Segregations of albite and chromite were found in Campo del Cielo and ameboidal FeS in Mont Dieu with the same shape as in liE irons together with minor Cr diopside and Na,K-rich glass.

Chen J. H.* Papanastassiou D. A. Wasserburg G. J. The Possible Determination of Internal Isochrons for Iron Meteorites [#1480] Re-Os on metal and schreibersite in iron meteorites provides the potential for the determination of internal isochrons for irons. This is applied to W allapai (liD) and other samples.

Papanastassiou D. A.* Chen J. H. Wasserburg G. J. Chronology and Composition Puzzles in Portales Valley [#1476] Rb-Sr and Sm-Nd isotopic results on Portales Valley present a puzzle for the evolution of this unique breccia.

Polnau E.* Lugmair G. W. Mn-Cr Isotope Systematics in the Two Ordinary Chondrites Richardton (H5) and Ste. Marguerite (H4) [#1527] Mn-Cr isotopic systematics were determined in the two chondrites Richardton (H5) and Ste. Marguerite (H4) and the calculated Mn-Cr ages are 4556.3 ± 1.6 Ma and 4565.0 ± 0.7 Ma, respectively. These ages are compared to the Pb-Pb ages determined by GOpel et al.

Shukolyukov A. * Lugmair G. W. Cr Isotope Systematics in the Eagle Station: Chronology and Evidence for a Genetic Link to Carbonaceous Chondrites [#1365] The study of the 53Mn-53Cr system in the pallasite Eagle Station has shown that it formed 4557.5 ± 0.6 Ma ago. The Cr isotopic signature is different from that of the main group and suggests a genetic link to CV3 chondrites.

Amelin Y. * U-Pb Chronology of Chondritic Pyroxenes [#1389] Pyroxenes from ordinary chondrites are found to contain highly radiogenic Pb, and are used to obtain precise pre- metamorphic ages.

Liberman R. G. Fernandez Niello J. O. Reedy R. C.* Fifield L. K. di Tada M. L. Cosmogenic Radionuclides in the Campo Del Cielo Iron Meteorite [#1661] Cosmogenic 10Be, 26AI, 36Cl, 41 Ca, and 59Ni were measured in the Campo del Cielo iron meteorite. Our results led us to conclude that the preatmospheric radius might have been approximately 2 m. Comparisons with other big bodies are also presented.

130 ______32nd LPSC Program Welten K. C. * Nishiizumi K. Caffee M. W. Masarik J. Wieler R. A Complex Exposure History of the Gold Basin IA-Chondrite Shower from Cosmogenic Radionuclides and Noble Gases [#2110] Cosmogenic radionuclides and noble gases in samples of the Gold Basin L-chondrite shower indicate a complex exposure history, with a first stage exposure on the parent body, followed by a second stage of -19 Myr in a meteoroid 3-4 m in radius.

Welten K. C. Nishiizumi K. Caffee M. W. * The Search for Meteorites with Complex Exposure Histories Among Ordinary Chondrites with Low 3HePNe Ratios [#2148] We present concentrations of cosmogenic radionuclides in 15 ordinary chondrites with low 3HeP1Ne ratios. We identified only one or two meteorites with a complex exposure history, whereas the others are consistent with single- stage exposures.

Nishiizumi K. * Caffee M. W. Jull A. J. T. Klandrud S. E. Exposure Histories of Shergottites Dar Al Gani 476148916701735 and Sayh Al Uhaymir 005 [#2117] We measured cosmogenic nuclides, 14C, 36Cl, 26Al, and 1 ~e in Dar al Gani 476,489, 670, and 735 and Sayh al Uhayrnir 005 basaltic shergottites. The exposure ages and terrestrial ages of these martian meteorites were investigated.

Schnabel C. MaP. Herzog G. F.* Faestermann T. Knie K. Korschinek G. 10 26 53 Be, Al, and Mn in Martian Meteorites [#1353] 53Mn contents of 6 martian meteorites give exposure (CRE) ages similar to those obtained from 3He, 21 Ne, and 1 ~e. CRE ages of ALH 77005 and LEW 88516 exceed those of shergottites Zagarni and QUE 94201, implying different ejection events.

Murty S. V. S. * Bhandari N. Bonino G. Castagnoli G. C. Parent Body Irradiation Records in the Fermo Brecciated (H) Chondrite [#1163] Nuclear tracks and cosmogenic nuclides show that Fermo (H) chondrite meteoroid was a small body and had a simple one stage exposure. Presence of solar flare Ne and neutron effects at 82Kr and 128Xe clearly indicate irradiation records acquired on the parent body.

32nd LPSC Program------131 Friday, March 16,2001 MARTIAN METEORITES 8:30 a.m. Room C

Chairs: M. Wadhwa C. D. K. Herd

Mikouchi T. * Koizumi E. McKay G. Le L. Schwandt C. Experimental Crystallization of the QUE9420I Basaltic Shergottite [#2100] We report preliminary crystallization experiments using the synthetic analog of the QUE9420 1 basaltic shergottite. The results support that the bulk composition of QUE94201 is close to its parent magma composition.

Wadhwa M. * Crozaz G. Lentz R. C. F. McSween H. Y. Jr. Trace Element Microdistributions in Los Angeles: A New Basaltic Shergottite Similar to, yet Distinct from, the Others [#1106] In this study we report on ion microprobe analyses of trace element concentrations in minerals of Los Angeles, a newly discovered basaltic martian meteorite. From these data, we make inferences regarding its petrogenesis and relationship to other known basaltic shergottites.

Goodrich C. A.* Zipfel J. Magmatic Inclusions in Olivine and Chromite in Basaltic Shergottite Sayh Al Uhaymir 005: Implications for Petrogenesis and Relationship to Lherzolitic Shergottites [#1174] SaU 005 has an excess mafic component which may be cumulus, xenolithic, or an admixed (primitive) magma. Melt inclusions in olivine and chromite are consistent with any of these, and suggest a link to lherzolitic shergottites rather than EET 79001A.

Oe K. * McKay G. Le L. REE and Strontium Partition Coefficients for Nakhla Pyroxenes [#2174] We present new partition coefficients for REE and Sr determined using a synthetic melt that crystallizes pyroxenes very similar in composition to Nakhla pyroxene cores. We believe these are the most appropriate partition coefficients to use in studying Nakhla.

Neal C. R. * Ely J. C. Jain J. C. New Platinum-Group Element (PGE) Data for Martian Meteorites: The Influence of Igneous Processing [#1682] New PGE data demonstrate the influence of igneous processing on the martian siderophile element budget.

Herd C. D. K. * Borg L. E. Papike J. J. Controls on Oxygen Fugacity During Martian Basalt Petrogenesis: Clues from Geochemical Correlations [#1150] The oxygen fugacity of Dar a! Gani 476 has been re-evaluated, and is QFM-2.3. Oxygen fugacity correlates with geochemical parameters in the martian basalts, indicative of assimilation of oxidized crustal material by reduced, mantle-derived melts.

Farquhar J. * Bao H. Thiemens M. H. Implications of Recent Observations of Mass-Independent Sulfur and Oxygen Isotope Fractionations in Terrestrial Samples for Interpretations ofSNC Meteorites [#1756] Recent observation of mass-independent oxygen and sulfur isotope fractionations in terrestrial rocks provide a new context for evaluating natural mass-independent oxygen and sulfur isotope fractionations observed in SNC meteorites.

132 ______32nd LPSC Program Mathew K. J. * Marti K. Nitrogen and Noble Gas Signatures in Nakhla: Identification of Primitive and Evolved Components [#1214] We identified a modem atmospheric Xe in Nakhla which requires a system opening, possibly 1.3 Ga ago. A solar- type, but modified by fission Xe, component is also identified. Ancient component is indicated by excess 12'1ce.

Boctor N. Z. * Alexander C. M. O.'D. Wang J. HauriE. Hydrogen Isotope Studies of Water-bearing Post-Stishovite Silica Phase and Feldspathic Glass in the Martian Meteorites Shergotty and Zagami [#1309] Hydrogen isotopes of post-stishovite silica and feldspathic glass and the source of water in these phases.

Nyquist L. E. * Reese Y. Wiesmann H. Shih C.-Y. Age of EE179001 Band Implications for Shergottite Origins [#1407] A precise Rb-Sr age of 174±3 Ma was determined for EET79001B. A Sm-Nd age of 169±23 Ma also was determined, but the Nd isotopic systematics are disturbed. This disturbance is attributed to incomplete isotopic equilibration during petrogenesis.

Jagoutz E. * Jotter R. Dreibus G. Zartman R. New U-PB Isotope Data on SNC Meteorites [#1307] We analysed Nakhla and SaU as well as an optically pure hand-picked mineral separate of Sau Plagioclase for U-Pb isotopic systematics. This new experiment strongly suggests that Nakhla and SaU originated from the same isotopic reservoir.

BorgL.E.* NyquistL.E. ReeseY. WiesmannH. ShihC.-Y. IvanovaM. NazarovM.A. TaylorL.A. The Age ofDhofar 019 and Its Relationship to the Other Martian Meteorites [#1144] Martian meteorite Dhofar 019 has a Sm-Nd age of 575±7 Ma and an initial ENd value of +34.8 ± 0.4. A Rb-Sr age of 525±56 Ma and an initial 87Sr/86Sr ratio of 0.70215 ± 3 is derived from mineral fractions least altered by terrestrial weathering.

Weiss B. P. * Vali H. Baudenbacher F. J. StewartS. T. Kirschvink J. L. Records of an Ancient Martian Magnetic Field in ALH84001 [#1244] SQUID microscope imaging and Ar/Ar dating demonstrate that some of the magnetization ALH84001 is at least 4 Gy old, the oldest ever detected in a planetary rock. This demonstrates that Mars had an active dynamo within 550 My of its formation.

32nd LPSC Program------133 Friday, March 16, 2001 MARS: LOOKING DOWN, BLOWN AROUND, AND ON THE GROUND 8:30 a.m. Room D

Chairs: A. B. Ivanov A. S. Yen

Ivanov A B. * Muhleman D. O. Reflected Signal Analysis and Surface Albedo in the Mars Orbiter Laser Altimeter (MOLA) Investigation [#1917] This work presents results from the analysis of the reflectivity data from the MOLA investigation. We will discuss calculation of the surface albedo using the MGS TES 9 micron opacity. We will also overview reflectivity data collected to date.

Pinet P. C. * Rosemberg C. Regional Photometry and Spectral Albedo of the Eastern Hemisphere of Mars in the 0.7-1. Micron Domain [#1640] The regional photometry of Mars is explored as a function of wavelength and surface albedo. The relationship between the Minnaert's coefficient and the geometric albedo appears more complex than the first order linear case generally considered.

Nowicki S. A. * Christensen P. R. The Thermophysical Properties ofAres Vallis from Thermal Emission Spectrometer Data [#1931] This investigation of the Ares Vallis region of Mars is a detailed analysis of TES data to constrain the thermophysical properties of the material exposed in the region, and interpret those as geologic surfaces.

Golombek M. P. * Jakosky B. M. Mellon M. T. Thermal Inertia of Rocks and Rock Populations [#1115] The effective thermal inertia of rock populations on Mars and Earth is derived from a model of effective inertia versus rock diameter. Results allow a parameterization of the effective rock inertia versus rock abundance and bulk and fine component inertia.

Edgett K. S. * Geologic Aspects and Relations of Small Eolian Dunes and Large Ripples on Mars [#1181] Small dune-like or large ripple-like eolian bedforms are common on Mars. Many are old, cratered, and mantled, others appear sharp and fresh. In either case, they are telling us something about recent geologic history of Mars.

Richardson M. I.* McCleese D. J. Aeolian Erosional and Depositional Cycles on Mars: Initial Exploration of Surface Wind Stress for Varying Surface Pressures and Orbital Parameters with a GCM [#1883] We present results from an atmospheric model which provide insight into how surface stresses vary with atmospheric mass and discuss implications for erosion and deposition

Fenton L. K. * Richardson M. I. The Origin of Bright and Dark Streaks on Mars: Using a Mars GCM to Solve the Problem [#1995] Because wind streaks are the only synoptic measurements of surface wind patterns on Mars, it is imperative to understand the origin of these features. Using GCM winds, we investigate the long-standing issue of the origin of bright and dark streaks.

Neakrase L. D. V. * Greeley R. Haberle R. M. Evidence of Strong Change in Seasonal Wind Pattern for Ultimi Lobe, Southern Polar Layered Deposits, Mars [#1207] Comparison of aeolian features with Mars Global Circulation Model for Southern Polar Layered Deposits using high-resolution MOC images.

134 ______32nd LPSC Program Greeley R. * Rafkin S.C. R. Haberle R. M. Kuzmin R. O. Topography and Aeolian Features: Dunes and Streaks Compared with Global and Meso Scale Wind Predictions [#2003] Aeolian features have been compared with global and meso-scale models of the atmospheric circulation which predict near-surface winds as a function of variables such as martian season and location on the planet.

Yen A. S. * Composition and Color of Martian Soil from Oxidation of Meteoritic Material [#1766] Aqueous weathering is not necessary for formation of the martian soils. The chemical composition and oxidation state of the surface fines can be attributed to meteoritic influx.

Farrand W. H.* Johnson J. R. Bell J. F. III N-Dimensional Visualization and Spectral Mixture Analysis Applied to Imager for Mars Pathfinder Data: Detection and Mapping of Rocks and Soils [#1656] . Sub-pixel analysis techniques applied to MPF IMP data indicate the presence of several rock and soil types. These techniques confirm the presence of a "black" rock type and indicate a new soil type.

Bishop J. L. * A Study of Soil and Duricrust Models for Mars [#1468] Analysis of soil and duricrust formation mechanisms on Mars. Soil analog mixtures have been prepared, characterized and tested through wet/dry cycling experiments; results are compared with Mars Pathfinder soil data (spectral, chemical and magnetic).

Stoker C. R. * Rages K. Get the Red Out: Removing Diffuse Sky Illumination from Mars Pathfinder Images [#1021] Radiative transfer calculations are performed to remove the effect of diffuse illumination on the color of the martian surface. We describe the methods and apply them to a radiometric calibration target, and to a superpan cube of the rock Yogi.

32nd LPSC Program 135 PRINT-ONLY PRESENTATIONS

Abdrakhimov A. M. Geologic Mapping of Vega I Landing Site Region [#1700] Geologic mapping of the Vega I landing site showed that the area is dominated by Wrinkle Ridged Plains (98%). Densely Fractured Plains (1% ), Shield Plains ( 1%) and some others are subordinate. So the lander probably sampled the Wrinkle Ridged Plains.

Abdrakhimov A. M. Geologic Mapping of Landing Site Region [#1719] Geologic mapping of the Vega 2 landing site showed that the area is dominated by Wrinkle Ridged Plains (99% ). Less widespread are Lobate Plains ( 1%) and Fractured and Ridged Plains (<0.1% ). So the lander probably sampled the Wrinkle Ridged Plains.

Abdrakhimov A. M. Geologic Mapping of Venera 8 Landing Site Region [#1590] Geologic mapping of the Venera 8landing site showed that the area is dominated by Shield Plains (75%). Wrinkle Ridged Plains ( 15%), Lobate Plains (3%) and some others are subordinate. So the lander most probably sampled the Shield Plains.

Abdrakhimov A.M. Geologic Mapping of Venera 9 Landing Site Region [#1601] Geologic mapping ofthe Venera 9landing site showed the area is dominated by Wrinkle Ridged Plains (60%). Fractured and Ridged Plains (21 %), Tessera Terrain (14%) and some others are subordinate. So the lander most probably sampled Shield Plains.

Abdrakhimov A. M. Geologic Mapping of Venera 10 Landing Site Region [#1632] Geologic mapping of the Venera 10 landing site showed that the area is dominated by Wrinkle Ridged Plains (60%). Lobate Plains (21 %), Tessera Terrain (15%) and some others are subordinate. So the lander most probably sampled Shield Plains.

Abdrakhimov A. M. Geologic Mapping of Venera 13 Landing Site Region [#1653] Geologic mapping of the Venera 13 landing site showed that the area is dominated by Wrinkle Ridged Plains (90%). Lobate Plains (3% ), Shield Plains (3%) and some others are subordinate. So the lander most probably sampled the Wrinkle Ridged Plains.

Abdrakhimov A. M. Geologic Mapping of Venera I4 Landing Site Region [#1670] Geologic mapping of the Venera 14 landing site showed that the area is dominated by Lobate Plains (53%). Wrinkle Ridged Plains (27%), Rift Terrain (14%) and some others are subordinate. So the lander most probably sampled the Lobate Plains.

Abels A. Integrated Remote Sensing of the Spider Impact Structure, Australia- Potential Effects of the Morphostructural Setting on Cratering [#1408] The Spider impact structure has been investigated by means of integrated remote sensing. It is concluded that cratering was influenced by the original morphostructural setting leading to the present, highly asymmetric properties of the deeply eroded site.

136 32nd LPSC Program Aittola M. Age Relations Between Coronae and Novae [#1503] Majority of the novae, which are located in the inner part of the coronae, seem to postdate corona formation. These novae are usually located close to the corona annulus and display prominent topographic rise.

Albin E. F. Igneous Dike Remnants and the Emplacement of Flood Lavas Within Martian Impact Basins [#1972] A survey of high resolution Mars Observer Camera (MOC) images has revealed thin linear ridge-like features that are interpreted as the weathered remnants of igneous dikes within impact basins.

Albin E. F. King J. D. Origin of Dark Slope Streaks Within the Schiaparelli Impact Basin, Mars [#1395] Schiaparelli basin is a prominent 470-km diameter impact feature situated in the equatorial cratered uplands of Mars. The nature and origin of dark slope streaks within the basin is discussed.

Alexeev V. A. The Strange Features of the H5 Chondrites [#1025] High fragmentation of H5 chondrites in the Earth atmosphere and significant losses of their cosmogenic and radiogenic gases may be caused by a feature of the catastrophic event on the parent body about 200 Ma ago.

Alexeev V. A. Gorin V. D. Ustinova G. K. The Kunya-Urgench and Some Other Fresh-fallen Chondrites: Cosmogenic Radionuclides [#1024] A set of radionuclide measurements in the fresh-fallen chondrites is carried out nondestructively, as a part of our research program to study the radiation history of the chondrites, as well as the radiation conditions in the contemporary heliosphere.

Badjukov D. D. Raitala J. Petrova T. L. Ni-Co, Cu, and Zn Sulfides in the Melt Rocks of the Saaksjarvi Crater: Characteristics and Their Possible Origin [#1532] Pentlandite, Fe-Ni-Co monosulfide, millerite, chalkopyrite, and sphalerite were found in the Saaksjarvi melts. Morphology of some inclusions suggests a presence of sulfide liquids in the melts. Meteoritic origin for Ni-Co sulfides is proposed.

Barr A. C. Pappalardo R. T. Stevenson D. J. Rise of Deep Melt into Ganymede's Ocean and Implications for Astrobiology [#1781] We investigate conditions under which magmatic events at Ganymede's rock/ice interface could generate pockets of water melt which rise through the ice mantle and carry nutrients to the ocean to help sustain a biota.

Bartholy J. Pongracz R. Teaching High-School and Undergraduate Students to Download, Understand and Use Satellite Images [#1600] This course is offered mainly for undergraduate students, however, the program can serve as a base in secondary schools or for self-education purposes. Our paper summarizes the course focusing on new ideas and features of satellite imagery.

Basilevsky A. T. Zabalueva E. V. Kotova I. V. Ivanov M.A. Photogeologic Analysis of the 15 m/px Resolution Images of Callisto Taken at Orbit C21 [#1548] 15 rn/px res Galileo images of Callisto show small (<1-2 km) craters which degradation style is similar to that of lunar craters of the same size. This indicates that major factors of their degradation are impact regardening and mass wasting.

32nd LPSC Program 137 Bell J. F. III Morris R. V. Farrand W. H. WolffM. J. A Re-Assessment of Global Color Units on Mars from Hubble Space Telescope Visible to Near-IR Imaging and Spectroscopy [#1484] We are using new multispectral imaging and imaging spectroscopic measurements of Mars from the Hubble Space Telescope (HST) to identify and map Mars surface color and spectroscopic units globally at scales of -20 to 50 km/pix.

Benoit P. H. Sears D. W. G. The Orbital Distribution of Meteorites Based on High Temperature Thermoluminescence: 1. Theory and Modem Falls [#1795] Like 250°C TL data, 400°C TL levels of modem falls largely reflect solar heating, and thus perihelia. The 400°C data offers additional constraints on orbital information for ordinary chondrites.

Berczi Sz. Fabriczy A. Hegyi S. Kovacs Zs. I. Keresztesi M. Cech V. Di6sy T. J6zsa S. Holba A. Lukacs B. Rosko F. Szakmany Gy. T6th Sz. Hegyi A. Kabai S. How We Used NASA Lunar Sample Set in Making an Educational Series of the Solar System Materials: (1 ), (2) [#1100] Our group compiled an Educational Atlas Series of the Solar System (Planetary and Material Maps). 1) Lunar and Asteroidal Evolution (lunar samples and meteorites), 2) Planetary Surface Studies by Surveyor and Experimental University Lander Hunveyor.

Bridges N. T. Greeley R. Kramer G. M. Laity J. E. Phoreman J. B. R. Wilson G. R. Proposed Wind Tunnel Studies ofVentifact Formation on Mars and Earth [#1873] Upcoming experiments to produce ventifacts in the wind tunnel under terrestrial and martian conditions are discussed.

Britt D. T. Kring D. A. Portales Valley: The Bidirectional Reflectance Spectrum of a Unique H5 Breccia [#1475] Portales Valley is an H5 ordinary chondrite with extensive crosscut metal rich veins. The bidirectional reflectance spectrum of its silicate portion is presented.

Britt D. T. Kelsey C. M. Kring D. A. : Spectra and Petrology ofan H4 Gas-rich Breccia [#1330] Ourique is a brecciated, gas-rich, H4 ordinary chondrite with a light-dark structure. The dark matrix shows lower reflectance and absorption features relative to the light clasts. The matrix is enhanced in the finest size fractions of metal.

Burba G. A. Blue J. Campbell D. B. Dollfus A. Gaddis L. Jurgens R. F. Marov M. Ya. Pettengill G. H. Stofan E. R. Topographic Feature Names on Venus: Progress in 2000, Review of 1997-2000 Development, Current State, and Prospective [#2098] 12 names assigned on Venus in 2000. The current list includes 1821 names of21 feature types. 95% of names present 11 types of features. The main named types are craters - 872, and coronae - 267. These two types possess 62% of the names.

Busarev V. V. Oxidized and Hydrated Silicates on M- and S-Asteroids: Spectral Indications [#1927] From our observational data we suppose that oxidized silicates may be widespread on the main-belt asteroids including differentiated bodies. Moreover, there is also a possibility of presence on the asteroids a small amount of hydrated silicates.

Cantor B. A. James P. B. Interannual Variability of the Martian Residual North Polar Cap [#1951] Low-resolution MOC images of Mars during the 2000-1 northern summer season reveal a residual north polar cap that is smaller than that seen the previous martian year.

138 ------32nd LPSC Program Caplinger M. A. High-Resolution Imaging of Ceraunius Tholus, Mars [#1342] Features seen in new images of the small Tharsis volcano Ceraunius Tholus from the Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) are described.

Chikami J. Mineralogical Study of GRA95209 in Comparison with Acapulcoites and lAB Iron Meteorites [#1168] High ZnO content in both GRA95209 chrornite and lAB iron meteorites and heterogenous metal distribution in GRA95209 and Caddo County lAB iron meteorite might suggest the common formation process between GRA95209 and lAB iron meteorites.

Chuang F. C. Figueredo P. H. Kirk R. L. Greeley R. Europa's 'Mitten': Estimate oflee Thickness Using an Elastic Plate Model [#1848] Results of a 2-D elastic plate model used to estimate the thickness of ice below Europa's 'mitten' are presented. Using properties of polycrystalline water ice and inferred Europan 'cryomagma', we calculate an elastic thickness of -2.1-2.6 km.

Clifford S.M. George J. A. Stoker C. R. G. Beaty D. W. A Proposal for an Integrated Geophysical Strategy to "Follow the Water" on Mars [#1904] In this abstract we propose an integrated strategy for the geophysical exploration of Mars that we believe represents the fastest, most cost-effective, and technically capable approach to identifying the state and distribution of subsurface water.

Cloutis E. A. Spectral Reflectance Properties of Calcium-Aluminum Inclusion Minerals: 2. Melilites [#1128] The reflectance spectra of melilites exhibit absorption features attributable to both ferrous and ferric iron. This mineral does not appear to be a spectrally dominant component of CAls. ·

Cloutis E. A. Bell J. F. III Reflectance Spectra of Heated Palagonites [#1208] Heating of palagonites results in a number of spectral changes, mimicking those of naturally heated palagonites.

These include reductions in H20/0H band depths, increasing reflectance and a redder sloped spectrum.

Cloutis E. A. Gautason B. Spectral Reflectance Properties of Calcium-Aluminum Inclusion Minerals: 1. Perovskites [#1127] The reflectance spectra of perovskites exhibit high overall reflectance and a number of absorption bands due to ferrous iron which may be diagnostic of composition.

Demidova S. I. Ulyanov A. A. Chemical Compositions of Rock-forming Minerals from Sahara 98044 (CV3) Refractory Inclusions and Findings of Rare Ge-rich Phases in Some Carbonaceous Chondrites [#1295] CAls from CV3 Sahara 98044 chondrite were studied and classified and detail mineralogical descripton of each type is given. Ge-rich phases were observed in one unique refractory inclusion from this chondrite and also in other carbonaceous chondrites.

Deutsch A. Kettrup D. Pesonen L. J. Pihlaja P. A Re-Examination of the Occurrence of Cosmic Spherules in the Mesoproterozoic Jotnian Sandstone [#1789] Following an earlier description of the occurrence of cosmic spherules in the Satakunta sandstone, Finland, we sampled different outcrops. After 2 years of careful separation, it turned out that the samples from the Satakunta sandstone are barren.

32nd LPSC Program------139 Dlugach J. M. Morozhenko A. V. Optical Characteristics of the Martian Dust [#1269] It is shown that when variations in optical thickness of the martian atmosphere are ignored in the analysis of the data obtained from the martian surface, this may result in overestimating both the values of the intensity and optical thickness of the dust component.

Durda D. D. SternS. A. Lunine J. I. Morbidelli A. Problematic Constraints on Collisional Evolution in the Edgeworth-Kuiper Belt: Difficulties in Exploiting the "Vesta Crust" Paradigm [#1669] The existence of 's volatile N2/CO/Cllt crust against 4.5 Gyr of Kuiper Belt bombardment is used to attempt to constrain the collisional history of the 30-50 AU zone and the timing of Pluto's crustal differentiation.

Edgett K. S. Malin M. C. Rock Stratigraphy in Gale Crater, Mars [#1005] A layered mound in Gale Crater is a remnant of a more extensive sequence that likely once filled the crater and represents a suite of layered materials on Mars interpreted as "Noachian" sedimentary rock units.

Fel'dman V.I. Opacitization or Shock-Thermal Decomposition? [#1164] During the action of shock wave on rock-forming minerals black opaque polymineral aggregate is formed. These aggregates are interpreted as a result of opacitization or shock-thermal decomposition. What is correct?

Fisenko A. V. Semjonova L. F. Estimation of Shock Pressure for Ureilites from the Contents ofAr and Xe in Diamonds [#1678] We have estimated the shock pressure in Kenna and Novo Urei ureilites on the basis of Ar and Xe contents in diamonds and bulk samples. It's possible the ureilites of this type have experienced shock pressure equal to 65±16 GPa.

Fisenko A. V. Verchovsky A. B. Semjonova L. F. Fillinger C. T. The Distribution ofAr and Xe Inside Diamond Grains from Efremovka [#1691] Analysis ofthe release pattern of Ar and Xe from grain size fractions ofEfremovka presolar diamonds at stepped combustion and pyrolysis indicates that in both cases the gases release as a result of destruction of the diamond lattice.

Foing B. H. Heather D. J. Duke M. Racca G. Pieters C. Mizutani H. Galimov E. Dunkin S. K. van Susante P. Frischauf N. Almeida M. ICEUM4 Participants Results and Recommendations from the International Conference on the Exploration and Utilisation ofthe Moon 4 (ICEUM4) [#1712] We present here highlights and recommendations from the ILEWG organized ICEUM4 meeting held in the Netherlands in July 2000.

Forni O. Le Mouelic S. Quirico E. de Bergh C. Marchis F. Schmitt B. Doute S. PrangeR. d 'Hendecourt L. Near-Infrared Spectral Observations of Triton [#1275] Near-infrared spectral observations of Triton have been obtained with the ESO-NTT telescope. 3 unidentified bands previously observed are no longer detected, and the extended spectral range will be useful to bring new clues on the surface of Triton.

Fowell M. Wilson L. Interpretation of Strain Measurements in Diana Chasma, Venus [#1294] We have used a new digital technique (usable as a general mapping tool) to explore the spatial variation of extensional tectonic strain within the Diana Chasma region of Venus. The results are consistent with the presence of micro-plates on Venus.

140 ______32nd LPSC Program Gektin Yu. M Kuzmin R. O. Selivanov A. S. TERM OS CAN Data-derived Thermal Inertia Mapping of Mars with Super High-Resolution [#1845] The results of TERMOSCAN data-derived thermal inertia mapping of Mars with super high-resolution are presented.

Gibbons H. L. Scott E. D. Wilson L. Head J. W. III Inferred Properties of Giant Radial Dikes Beneath Graben in Northern Tharsis, Mars [#1154] We analyze graben inN Tharsis to deduce the geometries of underlying giant dikes. The shapes and sizes of associated pit craters are used to find how much dike magma was erupted in spatially localized but violently explosive eruptive events.

Giese B. Wagner R. Neukum G. Pappalardo R. Head J. W. III Galileo SSI Team The Topography of Bright/Dark Terrain on Ganymede [#1751] Stereo images acquired during Galileo's 28th orbit are used to derive the topography in a bright-dark terrain transition area on Ganymede. Implications for the origin of bright terrain are given.

Giguere T. A. Hawke B. R. Blewett D. T. Taylor G. J. Lucey P. G. Spudis P. D. Geochemical Studies of the - Region of the Lunar Farside [#1516] Geochemical iron and titanium data is used to determine if the Lomonosov-Fleming basin is a cryptomare region.

Golubeva L. F. Shestopalov D. I. Some Peculiarities of S-Asteroid Surface Materials Obtained by Modeling ofAsteroid Reflectance Spectra [#1004] Reflectance spectra of 38 asteroids from SI-SVII subtypes and probable reflectance spectra of optic active minerals on surface of these asteroids have been calculated. Spectral properties of asteroid pyroxenes and olivines are described.

Gounelle M. Maurette M. Engrand C. Kurat G. Shu F. Refractory Phases of Micrometeorites and the "Primitivity" of Cometary Nuclei [#1626] We used common characteristics of refractory phases in modem and early micrometeorites to both further constrain the scenarios proposed for the origin of the solar system and confirm that cometary nuclei are not as primitive as previously thought.

Greeley R. Fagents S. A. Volcanic Pseudocraters on Mars: Icelandic Analogs [#1871] Pseudocraters are small conical structures which develop on some basaltic lava flows in Iceland as a result of the interaction of the active flow with water or marshy ground. These features have been studied in the field and compared with structures observed on Mars.

Greeley R. Kraft M. D. Survivability ofAggregate Sands on Mars [#1839] Sand-size particles are considered to exist on the surface of Mars, as indicated by the presence of numerous dunes and duneforms, as well as other evidence.

Greeley R. Iversen J.D. Beardmore G. Mickelson B. Metzger S. Martian Dust Devils: Laboratory Simulations [#1888] Mars dust devils are effective in raising particles into the atmosphere. A laboratory apparatus has been installed in which particle threshold and flux experiments can be run under Mars and Earth conditions.

Greshake A. Clayton R.N. Mayeda T. K. Dhofar 125: A New from Oman [#1325] With a total mass of2697 g Dhofar 125 is the largest acapulcoite ever found. It consists of olivine, augite, low-Ca pyroxene, plagioclase, Fe,Ni metal, troilite, chlorapatite, and chromite and displays a recrystallization texture with abundant 120° triple junctions.

32nd LPSC Program------141 Hargitai H. I. New Focuses on the Teaching of Planetology: Planetary Science at Middle Schools of Hungary [#1211] The education of Solar System bodies many times follows the traditions, which does not include our new knowledge. Now its place should be in instead of Physics. I give suggestions for a stronger emphasis on and Cartographic in education.

Haskin L.A. Korotev R. L. Jolliff B. L. On Surface-Sample Collection Strategy for Mars, with Lessons from Lunar Sampling [#1820] A reasonable sampling strategy for a Mars sample collection mission (assume total 0.5 kg) would be to obtain a few rocks not exceeding 5 g, at least halfthe mass as 1-5 mm rocklets, and a few 10-25-g samples of bulk regolith.

Haskin L.A. McKinnon W. B. Moss B. E. A Model for Properties of Basin Ejecta Deposits and Secondary Crater Densities [#1570] Ejecta scaling relationships, ballistic sedimentation, and ejecta fragment size distributions are used to give estimates of thicknesses of basin ejecta deposits, proportions of primary ejecta, and secondary crater diameters and surface densities.

Head J. W. III Medusae Fossae Formation as Ancient Polar Deposits?: Tests and New Data on Stratigraphic Relationships [#1394] Analysis of the Medusae Fossae Formation shows that its properties are consistent with those in polar regions; the age of the deposit may be partly Hesperian.

Head J. W. III Basilevsky A. T. The Hesperian Period of Martian History: Key Trends in Volcanic and Tectonic Activity [#1114] Volcanism in the Hesperian Period of Mars, together with global ridge and wrinkle-ridge formation, represent a major change in the evolution of the planet.

Head J. W. III Bridges J. C. Beagle 2 Landing Site: Regional Characteristics of Isidis Planitia from MOLA Data [#1236] The geologic setting and regional topography of the Mars Express Beagle 2 landing site in Isidis Planitia are documented.

Head J. W. III Ghatan G. J. Hesperian-aged Ice-rich Deposits near the South Pole: Evidence for Large-Scale Melting and Drainage in the Southern Noachis Terra Region of Mars [#1062] Analysis of the interior of a regional ice-rich deposit of Hesperian age near the south pole shows abundant evidence interior meltings and transport of water to the deposit margins and into surrounding lows.

Head J. W. III Hallet B. Origin of Sinuous Ridges in the Dorsa Argentea Formation: Additional Criteria for Tests of the Esker Hypothesis [#1366] Principles of esker formation are reviewed from glacial physics and Earth field observations to test the origin of sinuous ridges on Mars.

Head J. W. III PrattS. Closed Chaos Basins on Mars: Evidence for Regional Groundwater Drawdown and Collapse [#1774] A zone of isolated occurrences of chaotic terrain (closed chaos basins) is interpreted to represent drawdown of the regional groundwater table associated with the formation of Ma' Adim Valles, one of the largest valley networks on Mars.

142 ______32nd LPSC Program Head J. W. III PrattS. Large Hesperian Lake in Schmidt Valley near the South Pole of Mars: Evidence for Water Input and Drainage [#1159] Cavi and esker-like ridges suggest that water derived from melting of the Dorsa Argentea Formation ponded in the Schmidt valley to form a lake which was breached at its northern end and flowed down into the Argyre Basin.

Head J. W. III PrattS. Malea Planum Hesperian Volcanic Province: Characterization Using MOLA Data [#1627] New MOLA data permit characterization of highland paterae in Malea Planum and assessment of the adjacent Hesperian ridged plains.

Head J. W. III Wilson L. Mars: General Environments of Magma/H20 Interaction [#1218] General environments for the interaction of magma and water/ice on Mars are outlined.

Head J. W. III Wilson L. Mars: Geologic Setting of Magma!H20 Interactions [#1215] Specific environments of magma and water/ice interaction on Mars are described (plutons, dikes, sills).

Head J. W. III Ivanov M.A. Hiesinger H. Kreslavsky M.A. PrattS. Thomson B. J. Oceans in the Northern Lowlands of Mars?: Further Tests Using MGS Data [#1064] Continuing analyses of the northern lowlands oceans hypothesis find no support for the Amazonian, and ambiguous results for the Hesperian and Noachian.

Heber V. S. Baur H. Wieler R. High Resolution Solar He Record in Lunar Samples: Evidence for a Temporal Variation of the Solar Wind Composition with Time? [#1847] We present high depth resolution 3HefHe ratios of solar wind implanted in lunar regoliihic samples. These data show at face value a decreasing 3HefHe with increasing antiquity as might be expected from solar physics. However Ne isotopes suggest an alteration artefact.

Hess P. C. Longhi J. Capillary Effects on the Stability of Ice in Martian Crust [#1702] Capillary effects can stabilize liquid water by as much as 40°C below the bulk melting temperature.

HoffmanN. C02 Phase Changes and Flow Mechanisms for Non-Aqueous "Floods" on Mars [#1288] Water is not required as the active medium for sediment transport and erosion in the outburst "floods". C02 vapour- supported density flows are an ideal and far more probable mechanism. Explosive outbursts of subsurface liquid C02 the flows.

HoffmanN. Explosive COrdriven Source Mechanisms for an Energetic Outflow "Jet" at Aromatum Chaos, Mars [#1257] New models of subsurface liquid C02 escape show that giant gas-supported debris flows can be accelerated to speeds of 500 km/sec by the expansion pressure of C02 vapour. Aromatum chaos is modelled as a low-pressure rocket motor, but operating at cryogenic temperatures.

HoffmanN. The Origin of Pervasive Layering on Early Mars Through Impact/Atmosphere Feedback Mechanisms [#1582] Layering on Early Mars is not a localized feature of individual lake basins but a planetwide phenomenon tied to major impacts. Mass balance of ejecta and fill supports this. Major impacts would have caused wildly unstable atmospheres on early Mars.

32nd LPSC Program------143 HoffmanN. Kargel J. S. Tanaka K. L. Isidis Basin- A Potential Focus ofCryovolcanic Activity on Mars [#1493] Mounds in Isidis Basin may well be the sites of explosive eruptions of C02 from a subsurface liquid reservoir, rather than magmatic features. The surface chemistry and stratigraphy of lsidis may contain evidence of this cryovolcanism.

HoffmanN. Tanaka K. L. Kargel J. S. Banerdt W. B. Emplacement of a Debris Ocean on Mars by Regional-Scale Collapse and Flow at the Crustal Dichotomy [#1584] Giant debris flows could have filled the northern lowlands with -2 km of sediment in 103 to 105 years by catastrophic regional terrain collapse. The outburst floods and chaos zones are probably the waning stage of this process.

Horvath A. Ganti T. Gesztesi A. Berczi Sz. Szathmary E. Probable Evidences of Recent Biological Activity on Mars: Appearance and Growing of Dark Dune Spots in the South Polar Region [#1543] We imply from MGS images' morphological analysis: Dark Dune Spots (DDSs) on sand sheets, S. polar reg. Mars: 1) DDSs do not fit to fine topography, 2) water flows out from DDSs, 3) sublimation+ recent biological activity explain their changes. lpatov S.l. Formation ofTrans-Neptunian Objects [#1165] It may be possible that some large trans-Neptunian objects, asteroids, and planetesimals with diameter up to several hundreds kilometers were formed by compression of rarefied dust condensations, but not by accumulation of smaller planetesimals.

Ivanov A. V. Kononkova N. N. Zolensky M. E. Migdisova L. F. Stroganov I. A. The : A Large Albite Crystal- Fragment of an Alkaline Rock [#1386] A large albite crystal was found in a Kaidun thin section. The clast is the second alkaline rock found in meteorites.

Ivanov M.A. Basilevsky A. T. Morphology and Density of Impact Craters in Galileo Regio, Ganymede, and Asgard Basin, Callisto [#1501] Impact craters on Callisto and Ganymede have different preservation state. The variety of the degradation states occurred during the early bombardment when intensive formation of craters was accompanied by their rapid degradation.

Ivanov M.A. Kotova I. V. Basilevsky A. T. Density of Small Impact Craters at Asgard Basin, Callisto: Implications for the Relative Timing of the Asgard Event [#1121] The statistics of craters less than 8 km suggests that the intensity of crater degradation was rather high early in the history of Callisto. This may be caused by the presence of temporary atmosphere at Callisto in the beginning of its geologic history. lvanova M.A. Petaev M. I. Nazarov M.A. Taylor L.A. Wood J. A. Refractory Inclusions from the New CH Chondrite, NWA 470 [#1392] CAls from NW A 470 are grossite-, hibonite-, melilite- and spinel-rich, with anorthite and Al-diopside. One CAl contains the first reported occurrence of calcium monoaluminate, CaA120 4. These CAls probably formed in the region depleted in Mg relative to Ca and AI.

Johnson J. R. Plescia J. B. Field Spectroscopy ofModem and Ancient Calcareous Tufa Deposits [#1982] Visible/near-infrared and thermal infrared field spectroscopy of calcareous tufa deposits at Mono and Searles Lakes was used to study potential differences in carbonate/evaporite mineralogy related to age differences between the deposits.

144 32nd LPSC Program Johnson J. R. Sucharski T. Reid R. J. Implementation of the Image for Mars Pathfinder Calibration Algorithms in Isis [#2062] Version 3 of the spectrophotometric calibration algorithms for Imager for Mars Pathfinder (IMP) stereo camera multispectral image data sets has been implemented in the USGS Integrated Software for Imagers and Spectrometers (ISIS) software package.

Kargel J. S. Head J. W. III Hogenboom D. L. Khurana K. K. Marion G. The System Sulfuric Acid-Magnesium Sulfate-Water: Europa's Ocean Properties Related to Thermal State [#2138] Europa's aqueous evolution is modeled in the system H20-H2S04-MgS04. For a thin ice crust, the ocean is thick, warm ( -267 K) and dominated by MgS04; for a thick ice crust, the ocean layer is thin, cold (as low as 211 K), and dominated by H2S04•

Kashkarov L. L. Ivliev A. I. Assonov S. S. Kalinina G. V. Semenova A. S. Track-Thermoluminescence and Microstructure Data of Single Silicate Crystals from Lunar Regolith: The Problem of Gas Bubbles Formation [#1354] Tracks, thermoluminescence, and SEM investigations were carried out for lunar regolith crystals. Report includes measured parameters, estimated shock pressure and heating temperatures and their possible relation to gas micro bubbles formation.

KenkmannT. Deformation Mechanisms During Impact Crater Modification Inferred from the Crooked Creek Impact Structure, Missouri, USA [#1560] Microstructural investigations show that intergranular fracturing and brittle shear zone formation are dominant deformation modes during crater modification. Indications for plastic flow and granular flow were not found on the scale of observation.

Kerridge J. F. Marti K. Solar Nitrogen Measurements and Records of Past Radiations [#1246] Several new nitrogen isotopic signatures have recently been found to possibly approximate those in the solar wind, but major discrepancies in these observations preclude a firm identification of this important datum.

Kettrup B. Deutsch A. New Data for Chicxulub Target Lithologies and Ejecta Material [#1505] Geochemical analysis of lithic clasts in impactites is a promising approach to constrain the target, and to determine contributions of precursor rocks to the melt. Investigation of material from different KIT sites may enlighten ejecta mechanisms.

Kettrup D. Deutsch A. Micrometeorites in Sandstones: FRANKA -A Succesful Separation Method? [#1308] FRANKA and the results - unfortunately no new successful separation method to separate micrometeorites from solid rock samples. Similar to some welding and cutting techniques, the electrodynamical fragmentation produces spherical artifacts.

Korotev R. L. On the Systematics of Lunar Regolith Compositions [#1134] Some systematics of lunar regolith composition are discussed in terms of chemical elements measurable from orbit.

Korotev R. L. Jolliff B. L. Wang A. Gillis J. J. Haskin L.A. Fagan T. J. Taylor G. J. Keil K. Trace-Element Concentrations in Northwest Africa 032 [#1451] Trace-element concentrations (INAA) are presented for four samples of the NW A 032 lunar meteorite. The mare basalt has a moderately high Th concentration (1.9 ppm) and a higher Th!REE ratio than any other known mare basalt.

32nd LPSC Program------145 Kostama V-P. Classification ofArachnoids on Cytherean Surface [#1093] Arachnoids are morphological lithospheric features unique to Venus. Their distribution probably reflects the qualities of the Venusian geological development. Different geological environments give us the variables to use in classifying arachnoids.

Kozlova E. A. Michael G. G. Rodionova J. F. Shevchenko V. V. Compilation and Preliminary Analysis of a Catalogue of Craters of Mercury [#1231] We have used the data of the Mariner 10 spacecraft to create a new Morphological catalogue of craters of Mercury including 6334 craters of diameter 10 km and more.

Krause M. O. Grosfils E. B. Analysis of Bellas Rim Geologic Units Using Mars Orbiter Laser Altimeter (MOLA) Data [#1108] We use MOLA data to assess whether elevation or point to point slope can be used to discriminate between different geologic units with a range of ages in a lOxlO degree region on the east side of the Hellas impact basin rim.

Kuebler K. E. Wang A. Haskin L.A. Jolliff B. L. Characterization of Mini-Core Samples Using Raman Point-Counting [#1697] Four cores were analyzed to determine how accurately the Mars Microbeam Raman Spectrometer can assess their mineral modes. We compare mineral estimates from traverses across smooth and rough surfaces (good focal conditions vs. poor).

Kurat G. Brandstatter F. Clayton R. Nazarov M.A. Palme H. Schultz L. Varela M. E. Wasch E. Weber H. W. Weckwerth G. D'Orbigny: A New and Unusual Angrite [#1753] This is the sixth and largest angrite. Its chemical, mineralogical, 0 isotopic and rare gas compositions fit the range displayed by other angrites. It is porous in places, rich in druses and hollow spheres, a wonderful rock.

Lavrentjeva Z. A. Elemental Composition ofAccessory Minerals from Adhi Kot EH4 Chondrite [#1022] The results of elemental abundances in accessory minerals of enstatite chondrite Adhi Kot are reported.

Lavrukhina A. K. Helium Isotopes in Solar System [#1026] The differences in isotopic compositions of planetary He and solar He, which is produced by deuterium burning on the stage of the main sequence Sun, allow us to propose that accretion of protoplanetic nebula took place during earlier stages.

Le Mouelic S. Langevin Y. Estimation of the Bulk Iron Content of the Surface of Mercury from a Lunar Iron Mapping Technique [#1097] We use an integrated telescopic spectrum of Mercury to discuss the composition of the surface in terms of iron content.

Le Mouelic S. Forni O. Quirico E. Near Infrared Spectral Observations of the Asteroid I40 Siwa, Second Flyby Target of the Rosetta Mission [#1094] We present the first spectral observation ofthe C Class asteroid 140 Siwa in the near infrared domain (0.95-2.5 p.m). A flyby of 140 Siwa is planned in the baseline of the Rosetta mission in 2008.

Leya I. Wieler R. Neumann S. Michel R. Modelling the Cosmic-Ray Production Rates in Lunar Samples [#1504] We present production rates of cosmogenic nuclides in lunar samples.

146 ______32nd LPSC Program Lopez I. Plume-Lithosphere Interaction on Venus: Possible Scenarios for the Origin of Multiple and Asymmetric Coronae [#1268] This work considered three posible scenarios involving plume-lithosphere interaction on Venus that can produce the lateral flow and pending of a mantle diapir (channeling), process that could explain the occurrence of asymmetric and multiple coronae.

Lorenz C. Nazarov M. A. Kurat G. Brandstatter F. Ntaflos Th. Clast Population and Chemical Bulk Composition of the Dhofar OI8 Howardite [#1778] Besides the usual clasts of HED achondrite and CM chondrite heritage, Dhofar 018 contains also clasts of an aubrite and aLL chondrite- the first of such kind found in a howardite. What do they tell us?

Lucey P. G. Himichs J. L. Thermo-Reflectance Spectra: A New Tool for Compositiof!-al Analysis of Planetary Surfaces [#1486] Thermo-reflectance spectroscopy, a new tool for remote sensing analysis of planetary surfaces, exploits the temperature dependent NIR spectra of mafic minerals. This technique is effective at detecting olivine in olivine- pyroxene mixtures.

Malyshev A. I. Malysheva L. K. Mars' Planetary Evolution and the Problems of Earth Geodynamics [#1323] Degasification model of planetary evolution is considered. Schemes of planetary evolution for Earth and Mars are offered. is only special case of planetary evolution. It is peculiar to modem stage ofEarth evolution.

Marzari F. Vanzani V. Tomasella L. On the Origin of the 3:2 Almost Resonance Between the Two Earth-like Planets Orbiting Pulsar PSR 1257 + 12 [#1120] We suggest that the 3:2 near-resonance between the two more massive planets orbiting pulsar PSR1257 + 12 might be a consequence of two independent resonances (2:1 and 3:1) with a low-mass stellar companion, now completely evaporated.

Matrajt G. Maurette M. Duprat J. Engrand C. Gounelle M. Three New Tests to Validate EMMA and Confirm the Cometary Origin ofAntarctic Micrometeorites [#1540] We review all the evidences supporting the validity of a new scenario (EMMA) developed to account for various effects of the micrometeorite flux during the period of heavy bombardment, prior to 3.9 Ga ago.

Matrajt G. Maurette M. Engrand C. Gounelle M. From the Earth to Early Planetary Systems with EMMA [#1588] EMMA (Early MicroMeteorite Accretion) defines the initial state of the early atmosphere of the terrestrial planets and allows to extrapolate the results obtained for the Earth's hydrosphere to the other planets such as Mars.

Maurette M. Matrajt G. A Diffuse Cosmic Volcanism "Erupting" from the Thermosphere on the Early Earth [#1581] The deceleration of the enormous flux of early micrometeorites in the thermosphere generated a new kind of "cosmic volcanism" which has astonishing implications.

Maurette M. Leach S. Engrand C. Matrajt G. Search for Sites of Low Temperature Ion-Molecule Reactions in the Early Solar System [#1605] The DIH ratio of complex organic molecules in carbonaceous meteorites indicates that sites of low temperature ion- molecule reactions were existing in the early solar system. We investigated several processes to produce such sites.

32nd LPSC Program------147 Maurette M. Matrajt G. Gounelle M. Engrand C. Duprat J. Kurat G. EMMA and the Early Earth's Hydrosphere [#1586] EMMA (Early MicroMeteorite Accretion) is a scenario developped to account for various effects of large interplanetary dust particles in the inner solar system during the period of heavy bombardement.

Meyer B. S. Denny J. E. Clayton D. D. Calculating Chemical Evolution on the Web [#1785] We have constructed an interactive web site that may be of interest to cosmochemists seeking to understand the evolution of isotopes in the Galaxy. The URL is http://photon.phys.clemson.edu/gce.html.

Mitchell K. L. Explosive Volcanic Eruptions on Mars: An Improved Numerical Model [#1189] In the light of new data, I present an outline of a improved numerical model for explosive volcanic eruptions on Mars.

Miyamoto M. Mikouchi T. Diffuse Reflectance Spectra of a Eucrite: Resistance to Heating at Different Oxygen Fugacities [#1261] We have compared reflectance spectra of heated samples ofthe Millbillillie eucrite with those of several chondrites. Unlike chondrites, there has been little change in the spectra of the heated Millbillillie samples.

Morris R. V. GraffT. G. Shelfer T. D. Bell J. F. III Effects of Palagonitic Dust Coatings on Visible, Near-IR, and Mossbauer Spectra of Rocks and Minerals: Implication for Mineralogical Remote Sensing of Mars [#1912] Visible, near-IR, and Mossbauer measurements on dust coated rocks and minerals show that a 300 /LID thick layer is required to obscure the substrate for VNIR measurements and that a >2000-ILm-thick layer is required to obscure the substrate for Mossbauer measurements.

Nazarov M. A. Kurat G. Brandstatter F. Phosphorian Sulfides from the ALH 84029, ALH 85013, EET 96029, and Y 82042 CM Carbonaceous Chondrites [#1769] The listed CM chondrites, as all CM chondrites do, contain phosphorian Fe, Ni sulfides associated with schreibersite and/or barringerite which fit into the previously established compositional range. P-sulfides are a powerful taxonomy tool for CM chondrites.

NormanL. M. Fractal Dimensions and the Emplacement of Lava Flows: Conclusions from Experimental Analysis [#1536] Lava flow emplacement processes are studied and compared with the fractal dimension of the boundary of flows and the fractal dimension of the timing of new episodes of emplacment.

Okubo C. H. Schultz R. A. Inverse Topographic Modeling: A Tool for Finding Subjacent Wrinkle Ridge Faults [#2072] Mechanical models of wrinkle ridges can predict subjacent fault geometries based on systematic variations in topography.

OzimaM. Origin ofTerrestrial 3He (1 ): Re-Estimation of ET-3He Flux [#1186] The origin of terrestrial 3He appears to be different from heavy noble gases. We estimated ET-3He flux, one of possible sources for terrestrial 3He. This new estimation is less model-dependent, and the result is more easily tested statistically.

Papike J. J. Kamer J. M. Shearer C. K. Mn-Fe Systematics in Pyroxene from Planetary Basalts: An Indicator of Planetary Parentage [#1009] Pyroxene chemistries from the Earth, Moon, Mars, and 4 Vesta show indications of planetary parentage.

148 ______32nd LPSC Program Parmentier E. M. Zhong S. Zuber M. T. Gravitational Differentiation of an Initially Unstable Chemical Stratification: Origin of Lunar Asymmetries [#1329] Magmatic differentiation of the Moon creates an incompatible element-rich, dense residual mantle layer. To explain hemispheric crustal asymmetries, we examine conditions for diapirically instablity of this layer at spherical harmonic degree one.

Petaev M. I. Wood J. A. Chromium Condensation in the Solar Nebula: Insights from the Upgraded CWPI Code [#1424] Our new condensation model explicitly shows that the Cr depletions necessary to account for the chemical compositions of zoned metal grains in the CB chondrites could have resulted from the condensation of Cr in silicates.

Petaev M. I. Ivanova M.A. Nazarov M.A. Wood J. A. Silica-bearing Objects in the CH Chondrite NWA 470: Evidence for Their Formation in Fractionated Nebular Systems [#1450] Several occurrences of silica in the NWA 4 70 chondrite are described. One of the Si02-rich phases has chemical formula (K,Na,Ca)Mg2AlzSi9024·

Petaev M. I. Ivanova M. A. Nazarov M.A. Wood J. A. Zoned Metal Grains in the CH Chondrite NWA 470: More Constraints on the Cooling History of the CH Chondrite Nebular Source Region [#1443] Zoned metal grains in the CH chondrite NW A 470 display varied zoning patterns indicative of different formation conditions.

Plescia J. B. Big Basin, Kansas: Gravity Investigation of a Proposed Impact Structure [#1087] Big Basin is a proposed multiple impact structure in Kansas. There are three depressions 600--1700 min diameter. A gravity survey over the largest suggests the depressions are solution collapse structures rather than impact structures.

Plescia J. B. Elysium Region Tectonics [#1088] Tectonism in Elysium consists of graben and lineaments radial to Tharsis and graben and troughs concentric about the regional Elysium topographic high. Radial faulting associated with Elysium is not observed.

Plescia J. B. Geology ofTharsis Tholus, Mars [#1090] Tharsis Tholus exhibits two styles of faults: graben radial to Tharsis and normal faults which cut the entire edifice. The large normal faults may reflect whole deformation of the edifice due to sliding along a subsurface plastic layer.

Plescia J. B. Hackberry Flat, Oklahoma: Gravity Survey of a Proposed Impact Structure [#1086] Hackberry Flat, Oklahoma has been proposed to be of impact origin. The feature is 6.9 km wide, 10--15 m deep. A gravity survey over the features indicates the complete absence of any anomaly suggesting the feature is purely erosional in origin.

Plescia J. B. Johnson J. R. Ferris M. Visible-Near Infrared Spectroscopy of Hyperthermophile Organisms, Yellowstone National Park [#1895] VNIR reflectance data of hyperthermophile organisms indicate they can be differentiated on the basis of spectral character.

32nd LPSC Program------149 Plescia J. B. Shoemaker E. M. Shoemaker C. S. Connolly Basin, Western Australia: Total Magnetic Field Survey [#1217] Total magnetic field profiles across the Connolly Basin impact structure in Western Australia indicate the complete absence of any anomalies associated with the structure.

Povenmire H. The Tarlton, Ohio Indian Effigy Cross Mound [#1465] This astronomically significant, unique effigy mound is shown to be part of a much larger complex of earthworks connected by a 100 krn length Indian Highway.

Povenmire H. Povenmire K. Bookamer R. Palermiti M. Dunham D. The January 3, 2000 Lunar Occultation ofAsteroid (4) Vesta [#1464] Lunar occultations of bright asteroids can be observed by using small, portable equipment. Lunar occultations of asteroids provide the most theoretically precise astrometry pos~ible.

Prilutskyi O. Korchuganov B. Dolnikov G. Gerasimov M. Rieder R. Wanke H. Economou T. Detennination of Hydrogen in Surface Layers of Planetary Bodies by Means of Forward Scattering Spectrometry [#1525] Determination of hydrogen using elastic scattering ofH and D by alpha-particles from a Cm-244 source. Hydrogen can be determined down to concentrations of less than 0.01 wt%; within a certain range it is even possible to determine the HID ratio.

Protheroe W. J. Jr. Venance K. Stirling J. A. R. Cathodoluminescence Analysis of Nakhla 1401 Chloroapatites [#1638] Analysis of Nakhla 1401-1 using cathodoluminescence (CL) spectroscopy has allowed greater detail of composition differences in chloroapatites.

Protheroe W. J. Jr. Venance K. Stirling J. A. R. Nakhla 1911-369 Chloroapatites [#1642] Nakhla 1911-369[1] gives us a new insight into the complexity of chloroapatites.

Reedy R. C. Frankie S. C. Neutron-Capture Gamma-Ray Data for Obtaining Elemental Abundances from Planetary Spectra [#1655] Newly compiled and evaluated energies and intensities of gamma rays made by the capture of thermal neutrons by elements from H to Zn plus Ge, Sm, and Gd are reported for use in determining elemental composition by planetary gamma-ray spectroscopy.

Rice J. W. Jr. RuffS. W. New MOC Observations ofDorsa Argentea Sinuous Ridges [#2188] New photogeologic analysis of the enigmatic sinuous ridges of the Dorsa Argentea region near the martian south pole have been conducted utilizing MOC data. These ridges have significant paleoclimatic implications whatever their origin.

Rifkin M. K. Mustard J. F. Cooper C. D. Identification of Mantled and Disaggregated Terrain Imaged by the Mars Orbital Camera [#2064] Mantled and disaggregated terrain on Mars is observed in MOC images. The distribution of these terrains is strongly dependent on latitude, which implies a relationship to climate. Diverse morphologies hint at variability in the process of dissection.

Robert F. Camy-Peyret C. Non Mass Dependent Oxygen Isotopic Fractionation: A Numerical Application to the Ozone Specific Rate Coefficients. Implication for Cosmochemistry [#1718] A numerical application of a proposed theory for non-mass dependent effect is shown for isotopic reaction rates of ozone. Possible consequences for solid condensation in a high temperature gas. Numerical application to silicon isotopes.

150 32nd LPSC Program Robinson M. S. Scattered Light in the Clementine UWIS Camera [#2004] Limb images show that scattered light in the Clementine UVVIS camera can effect multispectral analyses of high contrast features. Residual signal in space (normalized to the limb) is 8-10% at 50 pixels and above 2% ofthe limb after 200 pixels.

Rubin A. E. Kallemeyn G. W. Was son J. T. Clayton R. N. Mayeda T. K. Grady M. M. Verchovsky A. B. Gujba: A New Bencubbin-like from Nigeria [#1779] Gujba is a new Bencubbin-like meteorite fall enriched in 15N and consisting (in vol.%) of 41% metal nodules, 20% large light-colored silicate nodules and 39% dark-colored, C- and silicate-rich matrix.

Sasaki S. Nakamura K. Hamabe Y. Kurahashi E. Hiroi T. A Successful Simulation of Space Weathering- Spectral Change and Nanophase Fe Particles on Olivine by Pulse-Laser Irradiation [#1610] Space weathering is simulated using nanosecond pulse laser. Laser-treated olivine pellets show reduction and reddening of reflectance, comparable to asteroid data. Nanophase Fe particles are found to have caused the optical property changes.

Saunders R. S. Meyer M. A. 200I Mars Odyssey: Geologic Questions for Global Geochemical and Mineralogical Mapping [#1945] 2001 Mars Odyssey has three experiments. GRS will map the surface elemental composition. MARIE will characterize the Mars radiation environment for risk to humans. THEMIS will map the mineralogy and morphology with a camera and thermal IR imaging.

Schultz R. A. Watters T. R. How Big is Amenthes Rupes? An Inversion of MOLA Data Using Mechanics [#1736] The structural topography of the Amenthes Rupes lobate thrust fault scarp, measured by MOLA, is modeled using mechanics. The best-fitting parameters indicate a deep fault, a specific dip angle, and spatially inhomogeneous contractional deformation.

Schwartz J. M. McCallum I. S. Evolution of the Basaltic Eucrite, Haraiya 6277 [#2030] Equilibrated eucrite, Haraiya, shows a range of textures with sharp boundaries between textural domains. However, calculations show a uniform cooling rate indicating a three-stage history of magmatic crystallization, brecciation, and thermal metamorphism.

Scott R. S. Wilson L. The Stress State of the Lunar Lithosphere and the Volumes of Intruded and Erupted Magmas [#1549] Using a new model of dike rise from the upper mantle we find the ranges of magma densities, magma source depths and lithosphere tensile stresses that could deliver large volumes of magma to either erupt at, or to intrude close to, the lunar surface.

Shearer C. K. Papike J. J. Kamer J. M. Chemistry of Olivine from Planetary Materials. Mn!Fe and Trace Element Systematics in an Unusual Achondrite: QUE 93148 [#1634] Major and trace element characteristics of olivine in basalts from Earth, Moon, and Mars reflect conditions of crystallization and potentially fingerprint the planetary body. Here, we extend this study to the planetary body represented by QUE 93148.

Shevchenko V. V. Skobeleva T. P. Crater Chains on Mercury [#1510] A few crater chains on the surface of Mercury are identified as impact tracks of "fragment trains" of the disrupted comets.

32nd LPSC Program------151 Shoemaker E. M Plescia J. B. Shoemaker C. S. Connolly Basin Impact Structure, Western Australia [#1311] Connolly Basin is a 9 km complex impact structure with a central uplift. The central uplift exhibits complex folding and faulting.

SikA. Comparative Study of Periglacial Mass Movements on Mars and Earth [#1762] Based on MOC images and my own field work experience, the fretted debris aprons of Mars are analogous to rock glaciers. By finding the correlation between morphology, mechanisms and changing environment, they can be used as paleoclimatic indicators.

Soderblom L. A. Yelle R. V. Near-Infrared Reflectance Spectroscopy ofMars (I .4--2.6 J..lm) from the New Millennium Deep Space 1 Miniature Integrated Camera and Spectrometer (MICAS) [#1473] Presented is an analysis of MICAS near-infrared observations of Mars (1.4-2.6 microns) by detailed modeling and removing atmospheric components and extracting surface reflectance spectra.

Spaun N. A. Pappalardo R. T. Head J. W. ill Equatorial Distribution of Chaos and Lenticulae on Europa [#2132] We have performed an equatorial assessment of chaos and lenticulae on Europa. A dominant diameter of 9 km is found and other mapping issues are addressed.

Starodubtseva O. M. Akimov L.A. Korokhin V. V. Seasonal Variations in the North-South Asymmetry of Polarized Light of Jupiter [#1095] Seasonal changes in the north-south asymmetry of polarization at high latitudes of Jupiter are revealed from polarimetric observations in blue light made over a 18-yr period. They are seemingly caused by seasonal north-south asymmetry in Jupiter's atmosphere insolation.

Szilassi L. Karsai J. Pataki T. Kabai S. Berczi Sz. How Interactive Graphical Modeling Helps Space Science and Geometry Education in Hungary [#1184] We developed a space science/construction/geometry curriculum: lessons, graphical designs of space form construction/modeling, infolding/folding out objects which is attractive by visualizing graphical projections, movements outside/inside objects.

Tanaka K. L. The Stratigraphy ofMars: What We Know, Don't Know, and Need to Do [#1695] To maintain its utility, the martian stratigraphic scheme must evolve to keep up with the state of knowledge. Geologic mapping and MGS data and careful application of stratigraphic techniques and principles can help refine the present scheme.

Taylor L.A. Cahill J. T. Patchen A. Pieters C. Morris R. V. Keller L. P. McKay D. S. Mineralogical and Chemical Chwacterization of Lunar Highland Regolith: Lessons Learnedfrom Mare Soils [#2196] The Lunar Soil Characterization Consortium has begun study of the <45 m fractions of ten representative highland soils, chosen for their contrasting maturities. Difficulties are addressed in the modal and chemical analyses of these highland soils.

Tejfel V. G. The Space-Time Asymmetry ofAtmospheric Properties on Saturn [#1315] A comparison of observational data for the last three decades show significant differences in the reflectivity and methane absorption bands intensity on Saturn's disk.

152 ______32nd LPSC Program Thomas C. Ghail R. C. Using Elliptical Craters as Strain Markers in Marius Regia, Ganymede [#1399] The quantitative degree of strain from transtensional movement can be successfully recovered by restoring the circularity of elliptical craters. We also intend to apply this method to other types of deformed craters on Ganymede.

Tunyi I. Timko M. Roth L. E. Shock Magnetic Field and Origin of the Earth [#1119] To the effects of impulse magnetic field in protoplanetary nebula (fast melting, cooling and magnetization of chondrules), there is added another possible effect- mechanism associated with the forces of attraction between magnetized planetesimals.

Ustinova G. K. Shock Wave Fractionated Krypton: 1. Effects of Energy Spectrum Rigidity [#1027] The effects of the Kr isotope fractionation due to the hardening of the energy spectrum of the incident particles accelerated by the strong shock waves in the early solar system, as well as in the contemporary heliosphere, are described.

Ustinova G. K. Shock Wave Fractionated Krypton: 2. Effects of Ion Acceleration [#1028] The effects of the noble gas fractionation, conditioned by the different acceleration of ions during the passage of strong shock waves, are featured with the examples of the Kr isotopic system.

Vasut J. A. Hyde T. W. Computer Modeling of Edge Effects in Plasma Crystals [#1158] Dusty plasmas play an important role in astrophysical environments such as protostellar clouds and ring systems. A computer simulation of such plasmas will be presented.

Vogel N. Baur H. Bischoff A. Semenenko V. P. Wieler R. Microdistribution of the Noble Gases Neon and Argon in Primitive Chondrites and Implications for Their Accretionary History [#1841] We present laser-extraction noble gas data from Krymka and Leoville chondrules, rims and one dark inclusion. The chondrules contain very small but measurable amounts of primordial Ne and Ar, the dark inclusion displays extremely high Ne and Ar, with Ne being Q-dorninated.

Wang A. Kuebler K. E. Freeman J. Jolliff B. L. Preliminary Raman Spectroscopic Survey on a Martian Meteorite- Los Angeles [#1427] A Raman survey on a flat-sawn rock slab provides the major mineralogy of martian meteorite Los Angeles. Three umeported accessory minerals and seven terrestrial alteration products and contaminants (organic and inorganic) were also found.

Wang A. Kuebler K. E. Jolliff B. L. Raman Spectroscopy of Opaque Minerals and Applications to EETA79001 Martian Meteorite [#1615] Martian meteorite EETA 79001 contains abundant Fe-Ti oxides, which yield Raman spectra useful for the assignment of their structural and compositional features.

Wark D. A. Boynton W. V. Metal Grains in CAis, Rim Flash Heating and CAl Growth Zoning [#1714] Metal grains in 6 Ca-Al-rich inclusions were found to become more 'refractory' from core to rim of the CAl, i.e., richer in refractory metals and poorer in Fe and Ni. This is due to primary metal zonation in the inner CAl and 'flash heating' at the rim.

32nd LPSC Program------153 Warren P. H. Gessler P. Bluewing 001: A New Eucrite with Extremely Unequilibrated Pyroxene, Cognate ( ?) Eucritic Xenoliths, and Stannem-like Geochemistry [#1970] New eucrite Bluewing 001 features unequilibrated, extensively zoned pyroxenes. Bluewing pyroxenes show systematic Ti-enrichment vs. zoned pyroxenes in Pasamonte. Some pyroxenes nucleated around xenolithic enclaves with lower (yet moderately high) mg.

Warren P. H. Taylor L.A. Kallemeyn G. Cohen B. A. Nazarov M.A. Bulk-Compositional Study ofThree Dhofar Lunar Meteorites: Enigmatic Siderophile Element Results for Dhofar 026 [#2197] The bulk chemistry of three new lunar meteorites is presented and placed within the context of each meteorite's petrographic texture. Unusual PGEs for D-26 is not explainable by contamination, but may reflect the presence of siderophile-rich nuggets.

Wasson J. T. Kallemeyn G. W. Compositions of Iron Meteorites in the lAB Complex; Six Groups Showing Similar Element-Au Trends [#2085] On element-Au diagrams lAB irons form a main group and parallel clusters called subgroups (S). IIIC (S2) and IIID (S3) are resolved from each other. S1 is intermediate between main group and S2. These may have formed in impact events on an asteroid.

Watters T. R. Studies of Martian Wrinkle Ridges Using MOIA Topographic Data: The Nature of Elevation Offsets [#1414] MOLA profiles across martian wrinkle ridges show the presence of elevation offsets. MOLA data has reveal that many wrinkle ridges do not exhibit elevation offsets and some may result from the ponding of lava flows or the accumulation of wind-blown material.

Watters T. R. The Topography of Lobate Scarps Along the Dichotomy Boundary from MOIA Data [#1597] The topography of lobate scarps along the crustal dichotomy boundary is being studied using MOLA data. The presence of thrust faults and fractures along the dichotomy boundary suggests that a major tectonic event was associated with its formation.

Wilson L. Head J. W. III Heat Transfer and Melting in Subglacial Volcanic Eruptions: Implications for Volcanic Deposits and Meltwater Volumes [#1213] Principles of ascent and emplacement below ice caps and glaciers are developed and criteria for recognition are presented.

Young L.A. Bullock M.A. Colwell W. B. Durda D. D. Gleason K. Parker J. Wm. SternS. A. Terrell D. YoungE. F. Photometric Monitoring of Triton at Sommers-Bausch Observatory in 2000 [#1999] We undertook pilot program to develop an observing and analysis strategy that can be used to measure Triton's B and V with 0.05 magnitude accuracy at moderate-to-small telescopes, under moderate-to-poor seeing conditions.

Zent A. P. Use ofSNC Meteorites to Constrain the Role of Oxidants in the Martian Regolith [#1770] Martian meteorites show evidence of oxidation, but putative Noachian organic materials should be accessible.

154 ______32nd LPSC Program Zent A. P. Quinn R. C. Grunthaner F. J. Hecht M. H. Buehlher M. A. J. Mars Atmospheric Oxidant Sensor (MAOS): An In-Situ Heterogeneous Chemistry Analysis [#1775] A new chemical sensor designed to detect oxidants in the martian environment has been developed.

Zolotov M. Yu. Shock E. L. Geochemical Constraints on the Oxidation States of the Europan Ocean and Mantle [#2025] We present observational, meteoritic, and physical-chemical arguments for an oxidized Fe-metal free mantle and an oxidized sulfate-carbonate rich ocean on Europa. The ocean should be out of equilibrium even with oxidized igneous rocks at the oceanic floor.

32nd LPSC Program------155

Author Index

* Denotes speaker.

Abbott N. Mars Surface ... I Posters, Th pm, UHCL Anderson J. G. Mars: Wrinkled ... Posters, T pm, UHCL Abbott K. Mars Missions Posters, Th pm, UHCL Anderson J. L. B. Modeling Impact ... Posters, T pm, UHCL Abdrakhimov A. M. Print-Only Presentations Anderson R. C.* Mars Magnets, T pm, Rm. B AbeY. Venus Geology ... Posters, Tpm, UHCL Anderson R. C. Mars: Subsurface Ice ... , Th am, Rm. C Abe Y* Mars: Subsurface Ice ... , Th am, Rm. C Anderson R. C. Mars Missions Posters, Th pm, UHCL AbeY. Mars Atmos .... Posters, Th pm, UHCL Anderson S. Mars Missions Posters, Th pm, UHCL Abels A. Print-Only Presentations Anderson S. W. Planet. Formation ... Posters, Th pm, UHCL AbreuN.M. Carbonaceous ... Posters, Th pm, UHCL Angel S. M. Mars Surface ... I Posters, Th pm, UHCL Accomazzi A. Education Posters, T pm, UHCL Angerrniller L. Education Posters, T prn, UHCL Acton C. H. Jr. Mars Missions Posters, Th pm, UHCL Annexstad 1. Mars Channels, ... Posters, T pm, UHCL AcunaM.H. Lunar Impacts, T am, Rrn. D Annexstad J. Cosmic Dust Posters, Th pm, UHCL Adams P .M. Mars Missions Posters, Th pm, UHCL Annexstad J. O. New Meteorites Posters, Th pm, UHCL AdlerM. Mars Missions Posters, Th pm, UHCL Antoine L. A. G. Impact ... Geology Posters Th pm, UHCL Aeschliman R. Remote Views ... Posters, Th pm, UHCL Antonenkol. Lunar Mare ... Posters, T pm, UHCL Agee C. Astrobiology I, Th am, Rm. A Aoshima C. Lunar Jambalaya ... Posters, T pm, UHCL Agee C. B. Planetary Formation I, W am, Rm. D April R. Mars Surface ... II Posters, Th pm, UHCL Agee C. B. Planetary Formation ... , Th am, Rm. D AraiT. Lunar Mare ... Posters, T pm, UHCL Agee C. B. Iron Meteorites Posters, Th pm, UHCL ArakawaM. Planet. Formation ... Posters, Th pm, UHCL Agee C. B. Planet. Form.... Posters, Th pm, UHCL Aramovich C. J. Martian Meteorites ... Posters, T pm, UHCL Agnor C. Origins of Planetary ... , M am, Rm. D Archinal B. Outer Body ... Posters, T pm, UHCL Agresti D. Mars Missions Posters, Th pm, UHCL Archinal B. A. Mars.Mapping Posters, T pm, UHCL Aharonson O. * Mars Surface Drainage ... , W am, Rm. C Archinal B. A. Fire and Ice ... Posters, Th pm, UHCL Ahrens T. 1. Impact Ejecta, T am, Rm. B Arkani-Hamed J.* Mars Geophysics, T am, Rm. C Ahrens T. J. Impact Cratering, T pm, Rm. D Arndt P. Cosmic Dust Posters, Th pm, UHCL Ahrens T. J. Small Bodies ... , W pm, Rm. B AmoldJ. R. A Year NEAR Eros, T pm, Rm. C Airieau S. A. Martian Meteorites ... Posters, T pm, UHCL Arrowsmith J. R. Mars Channels, ... Posters, T pm, UHCL Airieau S. A.* Carbonaceous Chondrites, W am, Rm. A Artemieva N. A.* Impact Ejecta, Tam, Rm. B Aittola M. Venus Geology ... Posters, T pm, UHCL Artemieva N. A. Modeling Impact ... Posters, T pm, UHCL Aittola M. Print-Only Presentations Artemieva N. A. MeteoroidS Posters, Th pm, UHCL Akimov L. A. Print-Only Presentations Arvidson R. E. Mars Data ... Posters, T pm, UHCL Akridge J. M. C. Asteroid-Meteorite ... Posters, T pm, UHCL Arvidson R. E. Mars Mapping Posters, T pm, UHCL Al-Badri Z.* Cosmic Dust, Th pm, Rm. D Arvidson R. E. Mars Surface ... I Posters, Th pm, UHCL Albarede F. Planetary Formation I, W am, Rm. D Arvidson R. E. Mars Missions Posters, Th pm, UHCL Albarede F. Meteorites: Isotopic ... Posters, Th pm, UHCL AscasoC. Astrobiology I, Th am, Rm. A Albin E. F. Mars: Small Scale ... Posters, T pm, UHCL AshR. D. Chondrules, M pm, Rm. A Albin E. F. Print-Only Presentations Asher P. Mars Surface ... I Posters, Th pm, UHCL Alexander C. M. O'D. Carbonaceous Chondrites, W am, Rm. A Asher P. M. Mars Surface ... I Posters, Th pm, UHCL Alexander C. M. O'D. Presolar Grains, W pm, Rm. A Ashley A. J. Impact Cratering, T pm, Rm. D Alexander C. M. O'D. * Cosmic Dust, Th pm, Rm. D Ashley A. J. Lunar Surfaces ... Posters, T pm, UHCL Alexander C. M. O'D. Cosmic Dust, Th pm, Rm. D AsphaugE. Origins of Planetary ... , M am, Rm. D Alexander C. M. O'D. Meteorites: Isotopic ... Posters, Th pm, UHCL AsphaugE.* A Year NEAR Eros, T pm, Rm. C Alexander C. M. O'D. Martian Meteorites, F am, Rm. C AsphaugE. Missions, ... Posters, Th pm, UHCL Alexeev V. A. Print-Only Presentations AsphaugE. Small Body ... Posters, Th pm, UHCL Allemand P. A. Impact Cratering, T pm, Rm. D Assonov S. S. Lunar Surfaces ... Posters, T pm, UHCL Allemand P. A. Mars Mapping Posters, T pm, UHCL Assonov S. S. Print-Only Presentations Allen C. Small Bodies ... , Wpm, Rm. B Avakians S. Cosmic Dust, Th pm, Rm. D Allen C. Astrobiology II Posters, Th pm, UHCL Avci R. Astrobiology I, Th am, Rm. A Allen C. C. Astrobiology II Posters, Th pm, UHCL AvciR. Astrobiology II Posters, Th pm, UHCL Allen C. C. Astrobiology III, F am, Rm. A Ayres N. Impact ... Geology Posters Th pm, UHCL Allen J. S. Education Posters, T pm, UHCL Azovskiy A. N. Meteoroids Posters, Th pm, UHCL Allen R. L. Origins of Planetary ... , M am, Rm. D Bada J. L. Astrobiology I, Th am, Rm. A Allie M. S. Lunar Surfaces ... Posters, T pm, UHCL Bada J. L. Carbonaceous ... Posters, Th pm, UHCL Allton J. H. Missions, ... Posters, Th pm, UHCL Bada J. L. Astrobiology II Posters, Th pm, UHCL Almeida M. Education Posters, T pm, UHCL Badjukov D. D. Martian Meteorites ... Posters, T pm, UHCL Almeida M. Remote Views ... Posters, Th pm, UHCL Badjukov D. D. Print-Only Presentations AlmeidaM. Print-Only Presentations BaileyS. H. A Year NEAR Eros, T pm, Rm. C Amaris. Presolar Grains, W pm, Rm. A Baines K. Outer Body Experiences, M pm, Rm. D Arnelin Y. Ordinary & Enstatite ... Posters, Th pm, UHCL BakerL.* The Tagish Lake ... , M am, Rm. A Arnelin Y* Meteorites: Composition ... , F am, Rm. B BakerY. Mars Magnets, T pm, Rm. B Arnils R. Europa Surface ... Posters, Th pm, UHCL BakerY. R.* Mars Surface Drainage ... , W am, Rm. C Anderson F. S. Venus Geology ... Posters, T pm, UHCL BakerY. R. Mars: Subsurface Ice ... , Th am, Rm. C Anderson F. S. Martian Canyons ... , W pm, Rm. C BalamD. D. Small Body ... Posters, Th pm, UHCL Anderson F. S. Mars Missions Posters, Th pm, UHCL Baliva A. Mars Missions Posters, Th pm, UHCL Anderson J. Mars Data ... Posters, T pm, UHCL BalmeM.R.* Venus: Texture ... , M pm, Rm. B Anderson J. A. Mars Data ... Posters, T pm, UHCL BalogaS. M. Mars Volcanism: ... , M am, Rm. C

32nd LPSC Program lndex ______l57 Baloga S. M. Venus Geology ... Posters, T pm, UHCL Benoit P. H. Print-Only Presentations Baloga S. M. * Io: Inside and Out, W am, Rm. B Berczi Sz. Mars Channels, ... Posters, T pm, UHCL Baloga S. M. Moon: Remote Sensing ... , Th pm, Rm. B Berczi Sz. Education Posters, T pm, UHCL Balogh R. Education Posters, T pm, UHCL Berczi Sz.* Moon: New Views ... , Th am, Rm. B Bandfield J. L Mars Volcanism Posters, T pm, UHCL Berczi Sz. Remote Views ... Posters, Th pm, UHCL Bandfield J. L. Martian Soil Chemistry ... , Th pm, Rm. C Berczi Sz. Impact ... Geology Posters Th pm, UHCL Bandfield J. L. Mars Surface ... II Posters, Th pm, UHCL Berczi Sz. Print-Only Presentations Banerd! B. Mars Channels, ... Posters, T pm, UHCL Berdichevsky M. Chondmles Posters, T pm, UHCL Banerd! W. B.* Mars Surface Drainage ... , W am, Rm. C Berman D. C. Mars Channels, ... Posters, T pm, UHCL Banerdt W. B. Print-Only Presentations Berman D. C. Mars Volcanism Posters, T pm, UHCL BaoH. Carbonaceous Chondrites, W am, Rm. A Berman D. C. Mars Surface ... II Posters, Th pm, UHCL BaoH. Martian Meteorites, F am, Rm. C Bernstein G. M. Origins of Planetary ... , M am, Rm. D Baratoux D. B.* Impact Cratering, T pm, Rm. D Berry F. J. Ordinary & Enstatite ... Posters, Th pm, UHCL Baratoux D. B. Mars Mapping Posters, T pm, UHCL Berthoud M.G. Asteroid-Meteorite ... Posters, T pm, UHCL BarlowN. G. Impact ... Mars Posters, T pm, UHCL Bertka C. Mars Geophysics, T am, Rm. C BarlowN. G. Education Posters, T pm, UHCL Bertka C. M. Planetary Formation ... Posters, Th pm, UHCL Barlow N. G.* Mars: Subsurface Ice ... , Th am, Rm. C Besmehn A.* Presolar Grains, W pm, Rm. A Barnouin-Jha O A Year NEAR Eros, T pm, Rm. C BeyerR. A. Mars Missions Posters, Th pm, UHCL Barnouin-Jha O. Mars Surface ... II Posters, Th pm, UHCL Bhandari N. Impact ... Geology Posters Th pm, UHCL Barnouin-Jha O. S.* A Year NEAR Eros, T pm, Rm. C Bhandari N. Meteorites: Composition ... , F am, Rm. B Barr A. C. Print-Only Presentations Bhangoo J. S. A Year NEAR Eros, T pm, Rm. C Barraclough B. L Moon: New Views ... , Th am, Rm. B Bhattacharyya A. Outer Body ... Posters, T pm, UHCL BarratJ. A. Meteorites: Isotopic ... Posters, Th pm, UHCL Bibring J.-P. Outer Body Experiences, M pm, Rm. D BarratJ. A. New Meteorites Posters, Th pm, UHCL Bierhaus E. B. Europa Surface ... Posters, Th pm, UHCL Barrett J. M. Mars Data ... Posters, T pm, UHCL Bills B. G. Europa Surface ... Posters, Th pm, UHCL Barrett J. M. Education Posters, T pm, UHCL Binder A. Lunar Impacts, T am, Rm. D Barsukova L D. Lunar Surfaces ... Posters, T pm, UHCL Binder A. B. Moon: New Views ... , M am, Rm. B Bart G. D. Martian Meteorites ... Posters, T pm, UHCL Binder A. B. Moon: New Views ... , Th am, Rm. B Bartholy J. Print-Only Presentations Binder A. B. Remote Views ... Posters, Th pm, UHCL Basilevsky A. T.* Venus: Texture ... , M pm, Rm. B Binns P. J. Lunar Surfaces ... Posters, T pm, UHCL Basilevsky A. T. Venus Geology ... Posters, T pm, UHCL Binzel R. P. Education Posters, T pm, UHCL Basilevsky A. T. Mars Surface ... II Posters, Th pm, UHCL Binzel R. P. Angrites, Eucrites, ... , W pm, Rm. D Basilevsky A. T. Print-Only Presentations Bischoff A. Carbonaceous Chondrites, W am, Rm. A Basu A.* Moon: New Views ... , Th am, Rm. B Bischoff A. Print-Only Presentations Baudenbacher F. J. Martian Meteorites, F am, Rm. C BishD.L Missions, ... Posters, Th pm, UHCL Baumgartner E. T. Mars Missions Posters, Th pm, UHCL Bishop J. L. Mars Surface ... I Posters, Th pm, UHCL BaurH. Presolar Grains, W pm, Rm. A Bishop J. L* Mars: Looking Down ... , F am, Rm. D BaurH. Print-Only Presentations Blacic J.D. Mars Missions Posters, Th pm, UHCL Bazylinski D. A. Astrobiology I, Th am, Rm. A Blanco A. Mars Surface-... I Posters, Th pm, UHCL Beard B. L.* Astrobiology I, Th am, Rm. A Bland P. A. The Tagish Lake ... , M am, Rm. A Beardmore G. Print-Only Presentations Bland P. A. Cosmic Dust Posters, Th pm, UHCL Beatty K.* Societal Connections ... ,Th pm, Rm. A Bland P. A. Meteoroids Posters, Th pm, UHCL Beaty D. W. Print-Only Presentations Bland P. A. Carbonaceous ... Posters, Th pm, UHCL Beck A. R. Lunar Mare ... Posters, T pm, UHCL Bland P. A. Meteorites: Isotopic ... Posters, Th pm, UHCL Becker K. Mars Mapping Posters, T pm, UHCL Bland P. A. Ordinary & Enstatite ... Posters, Th pm, UHCL Becker K. J. Mars Data ... Posters, T pm, UHCL BlaneyD.L Io: Inside and Out, W am, Rm. B Becker L.* Impact Ejecta, Tam, Rm. B Blaney D. L* Martian Soil Chemistry ... , Th pm, Rm. C BeckerT. Outer Body ... Posters, T pm, UHCL Blankenship D. D.* Europa Surface-Subsurface ... , Th pm, Rm. A BeckerT. Remote Views ... Posters, Th pm, UHCL BlanotD. Astrobiology I, Th am, Rm. A BeckerT. L Mars Data ... Posters, T pm, UHCL Bleacher J. Mars Volcanism Posters, T pm, UHCL BeckerT. L. Fire and Ice ... Posters, Th pm, UHCL Bleacher J. E. Mars: Wrinkled ... Posters, T pm, UHCL J. R. * Chondrules, M pm, Rm. A Bleacher J. E. Mars Channels, ... Posters, T pm, UHCL Beegle L. W. Astrobiology II Posters, Th pm, UHCL Bleacher J. E. Mars Volcanism Posters, T pm, UHCL Belian R. D. Moon: New Views ... , M am, Rm. B Bleacher J. E. Mars Mapping Posters, T pm, UHCL Bell J. F.* A Year NEAR Eros, T pm, Rm. C Bleacher J. E. Martian Canyons ... , W pm, Rm. C Bell J. F. III Frozen Mars: Polar ... , M pm, Rm. C Blearnaster L F. III Venus Geology ... Posters, T pm, UHCL Bell J. F. III A Year NEAR Eros, T pm, Rm. C BleckaM. L Mars Surface ... I Posters, Th pm, UHCL Bell J. F. III Asteroid-Meteorite ... Posters, T pm, UHCL Blewett D. T. Moon: New Views ... , M am, Rm. B Bell J. F. Ill A Year NEAR Eros Posters, T pm, UHCL Blewett D. T. Lunar Mare ... Posters, T pm, UHCL Bell J. F. III Mars Surface ... II Posters, Th pm, UHCL Blewett D. T. Moon: Remote Sensing ... , Th pm, Rm. B Bell J. F. Ill Mars: Looking Down ... , F am, Rm. D Blewett D. T. Remote Views ... Posters, Th pm, UHCL Bell J. F. III Print-Only Presentations Blewett D. T. Print-Only Presentations Bellucci G. Outer Body Experiences, M pm, Rm. D Blichert-Toft J. Planetary Formation I, W am, Rm. D Belshaw N. S. Chondrules, M pm, Rm. A BlueJ. Print-Only Presentations Belton M. Fire and Ice ... Posters, Th pm, UHCL Bluemchen T. Mars Missions Posters, Th pm, UHCL Belton M. J. S. Missions, ... Posters, Th pm, UHCL Blum J.D. Carbonaceous Chondrites, W am, Rm. A Ben Othman D. Meteorites: Isotopic ... Posters, Th pm, UHCL Blundell S. Mars Volcanism Posters, T pm, UHCL Benner L. A. M. Small Bodies ... , Wpm, Rm. B BoctorN.Z* Martian Meteorites, F am, Rm. C Bennett V. C. Lunar Impacts, Tam, Rm. D BodnarR.J. Martian Meteorites ... Posters, T pm, UHCL BenoitP. H. Asteroid-Meteorite ... Posters, T pm, UHCL BodnarR. J. Mars Surface ... I Posters, Th pm, UHCL

158 32nd LPSC Program Index BodnarR. J. Carbonaceous ... Posters, Th pm, UHCL Browne M. C. Missions, ... Posters, Th pm, UHCL Bogard D. D.* Angrites, Eucrites, ... , Wpm, Rm. D BrowningL. Carbonaceous Chondrites, W am, Rm. A Bogard D. D. Mars Atmos .... Posters, Th pm, UHCL BrowningR. Remote Views ... Posters, Th pm, UHCL Bogard D. D. Ordinary & Enstatite ... Posters, Th pm, UHCL Brownlee D. E. Small Bodies ... , W pm, Rm. B Boggs D. H. Lunar Jambalaya ... Posters, T pm, UHCL Brownlee D. E.* Cosmic Dust, Th pm, Rm. D Bolon C. Origins of Planet.... Posters, T pm, UHCL Brownlee D. E. Cosmic Dust Posters, Th pm, UHCL Bondarenko N. V. Venus Geology ... Posters, Tpm, UHCL BruceT. S. Impact ... Geology Posters Th pm, UHCL Bonino G. Meteorites: Composition ... , F am, Rm. B BruceT. S. Impact ... Geophy. Posters, Th pm, UHCL Bonnin-Mosbah M. Angrites, Eucrites ... Posters, T pm, UHCL Bruckner J. A Year NEAR Eros, T pm, Rm. C Bookamer R. Print-Only Presentations Bruckner J. A Year NEAR Eros Posters, T pm, UHCL Borg J. Cosmic Dust Posters, Th pm, UHCL Bruckner J.* Martian Soil Chemistry ... , Th pm, Rm. C BorgL. Lunar Mare ... Posters, T pm, UHCL Brunetti B. Remote Views ... Posters, Th pm, UHCL BorgL. E. Martian Meteorites ... Posters, T pm, UHCL Brunsell E. Education Posters, T pm, UHCL BorgL. E.* Martian Meteorites, F am, Rm. C Buchanan P. C. Impact ... Geology Posters Th pm, UHCL Borisov N. Lunar Surfaces ... Posters, T pm, UHCL Buchanan P. C. Shock Processes ... Posters, Th pm, UHCL Boroughs L. L. Lunar Mare ... Posters, T pm, UHCL Buchwald V. F. New Meteorites Posters, Th pm, UHCL Boss A. P.* Origins of Planetary ... , M am, Rm. D BuehlherM. Print-Only Presentations Boston P. J.* Astrobiology III, F am, Rm. A Buffler A. Lunar Surfaces ... Posters, T pm, UHCL Botta O. Carbonaceous ... Posters, Th pm, UHCL Bullock M.A.* Martian Soil Chemistry ... , Th pm, Rm. C Botta O. Astrobiology II Posters, Th pm, UHCL Bullock M. A. Print-Only Presentations Bottke W. Mars Volcanism Posters, T pm, UHCL BulmerM. H. Mars Volcanism Posters, T pm, UHCL Boubault F. R. Missions, ... Posters, Th pm, UHCL BulmerM. H.* Planetary Formation I, W am, Rm. D Boudjouk P. Cosmic Dust, Th pm, Rm. D BurattiB. Outer Body Experiences, M pm, Rm. D Bourcier W. L. Carbonaceous Chondrites, W am, Rm. A Burba G. A. Print-Only Presentations BourkeM. C. Mars Channels, ... Posters, T pm, UHCL Burbine T. H.* A Year NEAR Eros, T pm, Rm. C Bourke M. C.* Martian Canyons ... , Wpm, Rm. C Burbine T. H. A Year NEAR Eros Posters, T pm, UHCL BourkeR.D. Mars Missions Posters, Th pm, UHCL Burbine T. H. Education Posters, T pm, UHCL Bourot-Denise M. Ordinary & Enstatite ... Posters, Th pm, UHCL Burbine T. H.* Angrites, Eucrites, ... , W pm, Rm. D Bowden E. Impact Cratering, T pm, Rm. D Burchell M. J. Impact Cratering, T pm, Rm. D Boynton W. V. A Year NEAR Eros, T pm, Rm. C Burchell M. J. Cosmic Dust Posters, Th pm, UHCL Boynton W. V. Refractory Inclusions Posters, T pm, UHCL Burnett D. S. Refractory Inclusions, T pm, Rm. A Boynton W. V. A Year NEAR Eros Posters, T pm, UHCL Burr D. M. Mars Channels, ... Posters, T pm, UHCL Boynton W. V. Angrites, Eucrites, ... , W pm, Rm. D Burrell D. A. Small Body ... Posters, Th pm, UHCL Boynton W. V. Print-Only Presentations BusS. J. Education Posters, T pm, UHCL Bradley B. A. Mars Volcanism: ... , M am, Rm. C Busarev V. V. Print-Only Presentations Bradley B. A. Mars Volcanism Posters, T pm, UHCL Buseck P. R. Chondrites: Nebular ... , T am, Rm. A Bradley B. A.* Martian Canyons ... , W pm, Rm. C Buseck P. R. Carbonaceous Chondrites, W am, Rm. A Bradley J. Cosmic Dust, Th pm, Rm. D Buseck P. R. Meteorites: Isotopic ... Posters, Th pm, UHCL Bradley J. P.* Cosmic Dust, Th pm, Rm. D Busemann H.* Presolru: Grains, W pm, Rm. A Brake S. S. Astrobiology II Posters, Th pm, UHCL Bussey B. A Year NEAR Eros, T pm, Rm. C Brandon A. D. Planetary Formation ... , Th am, Rm. D Bussey D. B. J. A Year NEAR Eros, T pm, Rm. C Brandstatter F. Angrites, Eucrites ... Posters, T pm, UHCL Bussey D. B. J. A Year NEAR Eros Posters, T pm, UHCL Brandstatter F. Angrites, Eucrites, ... , Wpm, Rm. D Bussey D. B. J. Remote Views ... Posters, Th pm, UHCL Brandstatter F. Cosmic Dust Posters, Th pm, UHCL Buthelezi Z. Lunar Surfaces ... Posters, T pm, UHCL Brandstatter F. Print-Only Presentations Butler B. J. Outer Body ... Posters, T pm, UHCL Brandt D. Astrobiology III, F am, Rm. A Butman S. Mars Missions Posters, Th pm, UHCL Brearley A. J. Chondrules, M pm, Rm. A Butterworth A. L* Presolar Grains, W pm, Rm. A Brearley A. J.* Carbonaceous Chondrites, W am, Rm. A Butterworth A. L Cosmic Dust Posters, Th pm, UHCL Brearley A. J. Carbonaceous ... Posters, Th pm, UHCL ByrneM. Astrobiology II Posters, Th pm, UHCL Brearley A. J. Astrobiology III, F am, Rm. A Byrnes J. Planetary Formation I, W am, Rm. D Brian A. W. Venus Geology ... Posters, T pm, UHCL Byrnes J. M. Venus Geology ... Posters, T pm, UHCL Bridges J. C. Mars Missions Posters, Th pm, UHCL Cabrol N. A. Mars Channels, ... Posters, T pm, UHCL Bridges J. C. Print-Only Presentations Cabrol N. A.* Mars Surface Drainage ... , W am, Rm. C Bridges N. Mars Missions Posters, Th pm, UHCL Caddy B. Mars Channels, ... Posters, T pm, UHCL Bridges N. T. Venus Geology ... Posters, T pm, UHCL CaffeeM. W. Lunar Impacts, T am, Rm. D Bridges N. T.* Mars Surface Drainage ... , W am, Rm. C CaffeeM. W. New Meteorites Posters, Th pm, UHCL Bridges N. T. Print-Only Presentations Caffee M. W.* Meteorites: Composition ... , F am, Rm. B Briggs G. Print-Only Presentations CahiiiJ. T. Lunar Surfaces ... Posters, T pm, UHCL BrigmonR. L Astrobiology II Posters, Th pm, UHCL CahiiiJ. T. Print-Only Presentations Britt D. Small Bodies ... , Wpm, Rm. B CaiZ. Meteorites: Isotopic ... Posters, Th pm, UHCL Britt D. T. Asteroid-Meteorite ... Posters, T pm, UHCL Cairns B. Mars Missions Posters, Th pm, UHCL Britt D. T. A Year NEAR Eros Posters, T pm, UHCL CalvinW.M. Mars Surface ... I Posters, Th pm, UHCL Britt D. T. Print-Only Presentations Camara F. Lunar Jambalaya ... Posters, T pm, UHCL Brooks F. D. Lunar Surfaces ... Posters, T pm, UHCL A. G. W.* Origins of Planetary ... , M am, Rm. D Brooks S.M. Outer Body ... Posters, T pm, UHCL Campbell A. J. * Chondrites: Nebular ... , Tam, Rm. A Brown P. G. Small Body ... Posters, Th pm, UHCL Campbell A. J. Iron Meteorites Posters, Th pm, UHCL Brown R. H. Outer Body Experiences, M pm, Rm. D Campbell B. A.* Venus: Texture ... , M pm, Rm. B Brown R. H. Origins of Planet .... Posters, T pm, UHCL Campbell B. A. Planetary Formation I, W am, Rm. D Brown R. H. Small Bodies ... , Wpm, Rm. B Campbell D. B. Venus: Texture ... , M pm, Rm. B Brown R. H. Small Body ... Posters, Th pm, UHCL Campbell D. B. Small Bodies ... , Wpm, Rm. B

32nd LPSC Program lndex ______l59 Campbell D. B. Print-Only Presentations Christensen P. R. Martian Soil Chemistry ... , Th pm, Rm. C CampinsH. Small Body ... Posters, Th pm, UHCL Christensen P. R. Mars Surface ... II Posters, Th pm, UHCL Camy-Peyret C. Print-Only Presentations Christensen P. R. Mars: Looking Down ... , F am, Rm. D B. A. Print-Only Presentations Christeson G. L. Impact ... Geophy. Posters, Th pm, UHCL Canup R. Origins of Planetary ... , M am, Rm. D Chuang F. C. Europa Surface ... Posters, Th pm, UHCL CanupR. M.* Origins of Planetary ... , M am, Rm. D Chuang F. C. Print-Only Presentations Caplinger M. A. Print-Only Presentations ChybaC. F.* Europa Surface-Subsurface ... , Th pm, Rm. A Cappaccioni F. Outer Body Experiences, M pm, Rm. D Ciesla F. J. Chondrules, M pm, Rm. A CardiffM. Impact ... Geology Posters Th pm, UHCL Ciesla F. J. Chondrules Posters, T pm, UHCL Cardinal R. D. Small Body ... Posters, Th pm, UHCL Cintala M. J. Impact ... Geology Posters Th pm, UHCL Carlson R. Io: Inside and Out, W am, Rm. B Cintala M. J. Meteoroids Posters, Th pm, UHCL Carlson R. W. lo: Inside and Out, W am, Rm. B Cintala M. J. Shock Processes ... Posters, Th pm, UHCL Carroll K. A. Small Body ... Posters, Th pm, UHCL Cisarova I. Iron Meteorites Posters, Th pm, UHCL Carter B. L. Mars Channels, ... Posters, T pm, UHCL Claeys P. Impact Ejecta, Tam, Rm. B Carter L. M.* Venus: Texture ... , M pm, Rm. B Clark B. A Year NEAR Eros, T pm, Rm. C Caruso P. A* Martian Canyons ... , Wpm, Rm. C Clark B. C. Small Bodies ... , Wpm, Rm. B Castagnoli G. C. Meteorites: Composition ... , F am, Rm. B Clark B. E. A Year NEAR Eros, T pm, Rm. C Castano R. Mars Missions Posters, Th pm, UHCL Clark B. E. Asteroid-Meteorite ... Posters, T pm, UHCL Cataldo V.* Io: Inside and Out, W am, Rm. B Clark B. E. A Year NEAR Eros Posters, T pm, UHCL Cataldo V. Fire and Ice ... Posters, Th pm, UHCL Clark B. E. Small Bodies ... , Wpm, Rm. B Catchings R. D. Impact ... Geology Posters Th pm, UHCL Clark P. E. A Year NEAR Eros, T pm, Rm. C Catchings R. D. Impact ... Geophy. Posters, Th pm, UHCL ClarkP. E. A Year NEAR Eros Posters, T pm, UHCL Catling D. C. Mars Surface ... II Posters, Th pm, UHCL ClarkR. N. Outer Body Experiences, M pm, Rm. D T. A. Mars Surface ... II Posters, Th pm, UHCL ClarkR. N. Martian Soil Chemistry ... , Th pm, Rm. C Cech V. Print-Only Presentations Clayton D. D.* Presolar Grains, W pm, Rm. A Cerroni P. Outer Body Experiences, M pm, Rm. D Clayton D. D. Print-Only Presentations ChabotN. L. Planetary Formation I, W am, Rm. D Clayton R. Print-Only Presentations Chabot N. L. * Planetary Formation ... , Th am, Rm. D Clayton R.N.* The Tagish Lake ... , M am, Rm. A ChabotN. L. Iron Meteorites Posters, Th pm, UHCL Clayton R. N. Lunar Surfaces ... Posters, T pm, UHCL ChabotN. L. Planetary Formation ... Posters, Th pm, UHCL Clayton R.N. Presolar Grains, W pm, Rm. A Chadwick B. Impact Ejecta, T am, Rm. B Clayton R. N. Martian Soil Chemistry ... , Th pm, Rm. C Chafetz H. S. Astrobiology II Posters, Th pm, UHCL Clayton R.N. Meteorites: Isotopic ... Posters, Th pm, UHCL Chafetz H. S. Astrobiology III, F am, Rm. A Clayton R.N. New Meteorites Posters, Th pm, UHCL Chakrabarti S. K. Outer Body ... Posters, T pm, UHCL Clayton R.N. Meteorites: Composition ... , F am, Rm. B Chambers J. Cosmic Dust Posters, Th pm, UHCL Clayton R.N. Print-Only Presentations Chapman C. R. A Year NEAR Eros, T pm, Rm. C Clemett S. J. Astrobiology I, Th am, Rm. A Chapman C. R. A Year NEAR Eros Posters, T pm, UHCL Clemett S. J. Moon: New Views ... , Th am, Rm. B Chapman C. R. Small Bodies ... ,Wpm, Rm. B Clemett S. J. Astrobiology II Posters, Th pm, UHCL Chapman C. R. Europa Surface ... Posters, Th pm, UHCL Cliff B. Martian Meteorites ... Posters, T pm, UHCL Chapman M. G* Mars Volcanism: ... , M am, Rm. C Clifford S. M. Print-Only Presentations Charnley S. B.* Presolar Grains, W pm, Rm. A Cloutis E. Mars Surface ... I Posters, Th pm, UHCL Chauhan B. P. S. Cosmic Dust, Th pm, Rm. D Cloutis E. A* Martian Soil Chemistry ... , Th pm, Rm. C Chaussidon M. Refractory Inclusions, T pm, Rm. A Cloutis E. A. Mars Surface ... I Posters, Th pm, UHCL Chaussidon M. Refractory Inclusions Posters, T pm, UHCL Cloutis E. A. Mars Missions Posters, Th pm, UHCL ChenJ. H* Lunar Impacts, T am, Rm. D Cloutis E. A. Missions, ... Posters, Th pm, UHCL ChenJ. H.* Meteorites: Composition ... , F am, Rm. B Cloutis E. A. Print-Only Presentations ChenM. Impact Cratering, T pm, Rm. D Coath C. D. Astrobiology I, Th am, Rm. A ChenM. Shock Processes ... Posters, Th pm, UHCL Cochran A. L. Small Bodies ... ,Wpm, Rm. B Cheng A. A Year NEAR Eros, T pm, Rm. C Cochrane C. G.* Venus: Texture ... , M pm, Rm. B Cheng A. F.* A Year NEAR Eros, T pm, Rm. C Cockell C. S. Frozen Mars: Polar ... , M pm, Rm. C Cheng A. F. A Year NEAR Eros Posters, T pm, UHCL Cockell C. S. Astrobiology II Posters, Th pm, UHCL Cheng A. F. Small Bodies ... ,Wpm, Rm. B Cockell C. S.* Astrobiology III, F am, Rm. A Chesapeake Coring Cody G. D. III* Carbonaceous Chondrites, W am, Rm. A Team Impact ... Geology Posters Th pm, UHCL Cohen B. A.* Lunar Impacts, T am, Rm. D Chevallier L. Impact ... Geophy. Posters Th pm, UHCL Cohen B. A. Lunar Surfaces ... Posters, T pm, UHCL Chevrel S. Moon: New Views ... , Th am, Rm. B Cohen B. A. Print-Only Presentations Chevrel S. D. Missions, ... Posters, Th pm, UHCL Cohen J. L. Remote Views ... Posters, Th pm, UHCL Chevrel S. D. Remote Views ... Posters, Th pm, UHCL Collins G. C.* Outer Body Experiences, M pm, Rm. D Chicarro A. F. Mars Missions Posters, Th pm, UHCL Collins G. C. Outer Body ... Posters, T pm, UHCL Chikarni J. Angrites, Eucrites ... Posters, T pm, UHCL Collins G. S. Modeling Impact ... Posters, T pm, UHCL Chikami J. Print-Only Presentations Colson R. O. Lunar Mare ... Posters, T pm, UHCL ChioC. H. Mars Surface ... I Posters, Th pm, UHCL Colvin T. Outer Body ... Posters, T pm, UHCL Chipera S. J. Missions, ... Posters, Th pm, UHCL Colvin T. R. Mars Mapping Posters, T pm, UHCL Chizmadia L. J. Carbonaceous ... Posters, Th pm, UHCL Colvin T. R. Fire and Ice ... Posters, Th pm, UHCL Choblet G. Planetary Formation ... Posters, Th pm, UHCL Colwell J. E. Lunar Surfaces ... Posters, T pm, UHCL Chodas P. W. Small Body ... Posters, Th pm, UHCL ColwellW.B. Print-Only Presentations Choi B.-G.* Refractory Inclusions, T pm, Rm. A R. L. Venus Geology ... Posters, T pm, UHCL Christensen P. Martian Soil Chemistry ... , Th pm, Rm. C Connolly H. C. Jr. Chondrules, M pm, Rm. A Christensen P. R. Mars Volcanism Posters, Tpm, UHCL Connolly H. C. Jr* Refractory Inclusions, T pm, Rm. A Christensen P. R. Education Posters, T pm, UHCL Connolly H. C. Jr. Chondrules Posters, T pm, UHCL

160 32nd LPSC Program Index Consolmagno G. J. Asteroid-Meteorite ... Posters, T pm, UHCL D-CIXS Team Remote Views ... Posters, Th pm, UHCL Consolmagno G. J. A Year NEAR Eros Posters, T pm, UHCL DeBaer J. Cosmic Dust Posters, Th pm, UHCL Cook A. C. Mars Channels, ... Posters, T pm, UHCL de Bergh C. Print-Only Presentations Cook A. C. Mercury ... Posters, T pm, UHCL DeCarli P. S. * Impact Cratering, T pm, Rm. D Cook D. Mars Mapping Posters, T pm, UHCL DeCarlo F. Mars Surface ... I Posters, Th pm, UHCL Cook D. A. Mars Data ... Posters, T pm, UHCL DeHonR. A.* Martian Canyons ... , Wpm, Rrn. C CookT. C. Remote Views ... Posters, Th pm, UHCL Delacourt C. D. Impact Cratering, T pm, Rm. D Cooper B. Cosmic Dust Posters, Th pm, UHCL Delacourt C. D. Mars Mapping Posters, T pm, UHCL Cooper C. D.* Martian Soil Chemistry ... , Th pm, Rm. C Delaney J. Cosmic Dust, Th pm, Rm. D Cooper C. D. Print-Only Presentations Delaney J. R. Europa Surface-Subsurface ... , Tb pm, Rm. A CooperL. Education Posters, T pm, UHCL Delaney J. S. Planetary Formation I, W am, Rm. D Coradini A. Outer Body Experiences, M pm, Rm. D Delaney J. S. Missions, ... Posters, Th pm, UHCL Cord A.M. Missions, ... Posters, Th pm, UHCL DeloryG. T. Mars Atrnos .... Posters, Th pm, UHCL Cosarinsky M.* Carbonaceous Chondrites, W am, Rm. A De Maria G. Remote Views ... Posters, Th pm, UHCL Costard F.* Frozen Mars: Polar ... , M pm, Rm. C Demidova S. L Print-Only Presentations Costard F. Mars: Wrinkled ... Posters, T pm, UHCL DemuraH. Remote Views ... Posters, Th pm, UHCL CoxL. Astrobiology I, Tb am, Rm. A Deneault E. Presolar Grains, W pm, Rm. A Craddock R. A. Mars Channels, ... Posters, T pm, UHCL DeNicola P. Impact ... Geology Posters Th pm, UHCL Craddock R. A. Lunar Mare ... Posters, T pm, UHCL Denny J. E. Print-Only Presentations Craddock R. A. Mars Surface Drainage ... , W am, Rm. C DeschM. D. Mars Atrnos .... Posters, Th pm, UHCL CraigM. Mars Missions Posters, Th pm, UHCL Desch S. 1.* Chondrules, M pm, Rm. A Crawford D. A. Mars Surface Drainage ... , W am, Rm. C Desch S. J. Origins of Planet. ... Posters, T pm, UHCL Creighton J. A. Cosmic Dust Posters, Th pm, UHCL Desnoyers D. W. Venus: Texture ... , M pm, Rm. B CremersD. Missions, ... Posters, Th pm, UHCL Desnoyers D. W. Venus Geology ... Posters, T pm, UHCL Cremers D. A. Mars Missions Posters, Th pm, UHCL Deutsch A. Cosmic Dust Posters, Th pm, UHCL Cressey G. Cosmic Dust Posters, Th pm, UHCL Deutsch A. Impact ... Geology Posters Th pm, UHCL Cressey G. Meteoroids Posters, Th pm, UHCL Deutsch A. Print-Only Presentations Cressey G. Meteorites: Isotopic ... Posters, Th pm, UHCL De Vries S. T. Planetary Formation I, W am, Rm. D Crider D. H.* Moon: New Views ... , Th am, Rm. B DeWetA. Mars Volcanism Posters, T pm, UHCL Crisp J. Mars Missions Posters, Th pm, UHCL d'Hendecourt L. Cosmic Dust Posters, Th pm, UHCL Crown D. A. Mars Volcanism: ... , M am, Rm. C d'Hendecourt L. Print-Only Presentations Crown D. A. Mars: Small Scale ... Posters, T pm, UHCL di Camillo M. Martian Canyons ... , W pm, Rm. C Crown D. A. Venus Geology ... Posters, T pm, UHCL Dickey J. O Lunar Jambalaya ... Posters, T pm, UHCL Crown D. A. Mars Surface Drainage ... , W am, Rm. C Dickinson T. L. Angrites, Eucrites, ... , W pm, Rrn. D Crown D. A.* Martian Canyons ... , Wpm, Rm. C DikovYu. P. Moon: New Views ... , M am, Rrn. B Crozaz G.* Lunar Impacts, T am, Rm. D Di6syT. Print-Only Presentations Crozaz G. Angrites, Eucrites, ... , W pm, Rm. D DiSimoneS. Mars: Small Scale ... Posters, T pm, UHCL Crozaz G. Meteorites: Composition ... , F am, Rm. B di TadaM. L Meteorites: Composition ... , F am, Rm. B Crozaz G. Martian Meteorites, F am, Rm. C Dlugach J. M. Print-Only Presentations Cruikshank D. Outer Body Experiences, M pm, Rm. D DohmJ.M. Mars Magnets, T pm, Rm. B Crumpler L. S. Mars Surface ... II Posters, Th pm, UHCL DohmJ.M. Mars Surface Drainage ... , W am, Rm. C Crumpler L. S. Mars Missions Posters, Th pm, UHCL Dohm1. M* Mars: Subsurface Ice ... , Th am, Rm. C Curchin J. M. Outer Body Experiences, M pm, Rm. D Dollfus A. Print-Only Presentations Cuzzi J. Origins of Planetary ... , M am, Rm. D Dolnikov G. Print-Only Presentations Cuzzi J. N. Outer Body Experiences, M pm, Rm. D Dombard A. 1. Mercury ... Posters, T pm, UHCL Cuzzi J. N. Mars: Subsurface Ice ... , Th am, Rm. C Domeneghetti M. C. Lunar Jambalaya ... Posters, T pm, UHCL Cyr K. E. Missions, ... Posters, Th pm, UHCL Domergue-Schmidt N. Missions, ... Posters, Th pm, UHCL Dah!J. M.* Impact Ejecta, T am, Rm. B Domingue D. A Year NEAR Eros, T pm, Rm. C Dai Z. R. Cosmic Dust, Tb pm, Rm. D Dones L. Origins of Planetary ... , M am, Rm. D Dalrymple G. B. Lunar Impacts, T am, Rm. D DongW. Angrites, Eucrites ... Posters, T pm, UHCL Dalton 1. B. III* Outer Body Experiences, M pm, Rm. D Dorris J. R. III Venus: Texture ... , M pm, Rm. B DalyM. E. Outer Body Experiences, M pm, Rm. D Doute S.* Io: Inside and Out, W am, Rm. B Dannelly H. K. Astrobiology II Posters, Th pm, UHCL Doute S. Print-Only Presentations DaubarL J. Environmental ... Posters, T pm, UHCL Drake B. G. Small Bodies ... ,Wpm, Rm. B DavidsonK. Martian Meteorites ... Posters, T pm, UHCL Drake M. 1. Planetary Formation ... , Th am, Rm. D Davies A. G. Environmental ... Posters, T pm, UHCL Draper D. S. Martian Meteorites ... Posters, T pm, UHCL Davies A. G.* Io: Inside and Out, W am, Rm. B Draper D. S. Planetary Formation I, W am, Rrn. D Davies A. G. Fire and Ice ... Posters, Th pm, UHCL Draper D. S. Planetary Formation ... Posters, Tb pm, UHCL Davies J. K. Small Bodies ... , Wpm, Rm. B DreibusG. Martian Soil Chemistry ... , Th pm, Rm. C DaviesM. Outer Body ... Posters, T pm, UHCL Dreibus G. Martian Meteorites, F am, Rm. C DaviesM.E. Mars Mapping Posters, T pm, UHCL Dressler B. O. Impact Cratering, T pm, Rm. D DaviesM.E. Fire and Ice ... Posters, Th pm, UHCL Dressler B. O. Impact ... Geology Posters Th pm, UHCL Davis A. M. Refractory Inclusions, T pm, Rrn. A Drossart P. Outer Body Experiences, M pm, Rm. D Davis A. M. Refractory Inclusions Posters, T pm, UHCL Dubrovinsky L. Impact Cratering, T pm, Rm. D Davis A.M.* Presolar Grains, W pm, Rm. A Dubuffet F. Fire and Ice ... Posters, Th pm, UHCL Davis A. M. Meteorites: Isotopic ... Posters, Tb pm, UHCL Ducceschi C. Education Posters, T pm, UHCL Davis D. R. Origins of Planetary ... , M am, Rm. D DukeM. Moon: Remote Sensing ... , Th pm, Rm. B DavisD.R. Small Body ... Posters, Th pm, UHCL DukeM. Remote Views ... Posters, Th pm, UHCL Daydou Y. Remote Views ... Posters, Th pm, UHCL DukeM. Print-Only Presentations Daydou Y. H. Missions, ... Posters, Th pm, UHCL Dunand D. C. Outer Body Experiences, M pm, Rm. D

32nd LPSC Program Index ______l61 Duncan A. Astrobiology II Posters, Th pro, UHCL Fagents S. A. Europa Surface ... Posters, Th pro, UHCL Duncan M. J. Origins of Planetary ... , M am, Rm. D Fagents S. A. Print-Only Presentations Duncan R. A. Lunar Impacts, T am, Rm. D Fahey A. J. Martian Meteorites ... Posters, T pm, UHCL Dunham D. Print-Only Presentations Fanale F. P. Io: Inside and Out, W am, Rm. B Dunham W. R. Angrites, Eucrites ... Posters, T pm, UHCL Farmer J.D. Mars Channels, ... Posters, T pro, UHCL Dunkin S. K. Lunar Mare ... Posters, T pro, UHCL Farquhar J. The Tagish Lake ... , M am, Rm. A Dunkin S. K. Remote Views ... Posters, Th pro, UHCL Farquhar J. Martian Meteorites ... Posters, T pm, UHCL Dunkin S. K. Print-Only Presentations Farquhar J. Carbonaceous Chondrites, W am, Rm. A Duprat J. The Tagish Lake ... , M am, Rm. A Farquhar J. * Martian Meteorites, F am, Rm. C Duprat J. Cosmic Dust Posters, Th pm, UHCL Farrand W. H. Frozen Mars: Polar ... , M pm, Rm. C Duprat J. Print-Only Presentations Farrand W. H. Mars Volcanism Posters, T pro, UHCL Durakiewicz T. Astrobiology II Posters, Th pm, UHCL Farrand W. H. Education Posters, T pro, UHCL DurdaD. D. Impact Ejecta, Tam, Rm. B Farrand W. H.* Mars: Looking Down ... , F am, Rm. D DurdaD. D. Print-Only Presentations Farrand W. H. Print-Only Presentations Dusenbery P. B. Education Posters, T pm, UHCL Farrar K. S. Outer Body ... Posters, T pro, UHCL d'UstonC. Remote Views ... Posters, Th pm, UHCL Farrell W. M. Mars Atrnos .... Posters, Th pm, UHCL Duxbury T. C. Mars Mapping Posters, T pm, UHCL Fegley B. Jr. Io: Inside and Out, W am, Rrn. B DyarM. D.* Planetary Formation I, W am, Rm. D Fei Y. Mars Geophysics, T am, Rm. C DyarM.D. Missions, ... Posters, Th pro, UHCL Fei Y. Planetary Formation ... , Th am, Rrn. D DypvikH. Environmental ... Posters, T pro, UHCL Fei Y. Shock Processes ... Posters, Th pm, UHCL Ebel D. S.* Refractory Inclusions, T pro, Rrn. A Fei Y. Planetary Formation ... Posters, Th pm, UHCL EbiharaM.* Carbonaceous Chondrites, W am, Rrn. A Fel'drnan V.I. Print-Only Presentations EbiharaM. New Meteorites Posters, Th pm, UHCL Feldman W. Remote Views ... Posters, Th pm, UHCL EbisawaN. Carbonaceous Chondrites, W am, Rm. A Feldman W. C. Moon: New Views ... , M am, Rrn. B Economou T. Print-Only Presentations Feldman W. C.* Moon: New Views ... , Th am, Rrn. B Economou T. E. Martian Soil Chemistry ... , Th pm, Rrn. C Feldman W. C. Remote Views ... Posters, Th pm, UHCL Edgett K. S. Mars Polar Posters, T pm, UHCL Fenton A. Mars Missions Posters, Th pro, UHCL Edgett K. S.* Mars: Looking Down ... , F am, Rm. D Fenton L. K. * Mars: Looking Down ... , F am, Rm. D Edgett K. S. Print-Only Presentations Fernandez Niello J. O. Meteorites: Composition ... , F am, Rm. B Edrnunson J. Martian Meteorites ... Posters, T pro, UHCL Femandez-Remolar D.C.Europa Surface ... Posters, Th pm, UHCL Edwards K. A Year NEAR Eros Posters, T pm, UHCL Ferris J. Mars Magnets, T pro, Rrn. B Edwards K. Remote Views ... Posters, Th pro, UHCL Ferris J. C. Mars Surface Drainage ... , W am, Rm. C Edwards L. E. Impact ... Geology Posters Th pro, UHCL Ferris J. C. Mars: Subsurface Ice ... , Th am, Rm. C Eichhorn G. Education Posters, T pm, UHCL Ferris M. Mars Missions Posters, Th pro, UHCL Ekholm A. G. Europa Surface ... Posters, Th pro, UHCL Ferris M. Missions, ... Posters, Th pro, UHCL EI Goresy A.* Impact Cratering, T pm, Rrn. D Ferris M. Print-Only Presentations El Goresy A. Presolar Grains, W pm, Rrn. A Ferro D. Remote Views ... Posters, Th pro, UHCL Eliason E. M. Mars Data ... Posters, T pm, UHCL Feser M. Cosmic Dust, Th pm, Rrn. D Eliason E. M. Education Posters, T pm, UHCL Fifield L. K. Meteorites: Composition ... , F am, Rrn. B Eliason E. M. Remote Views ... Posters, Th pro, UHCL Figueredo P. H. Fire and Ice ... Posters, Th pro, UHCL Elkins Tanton L. T. * Moon: New Views ... , M am, Rrn. B Figueredo P. H. Europa Surface ... Posters, Th pro, UHCL Elkins Tanton L. T. Lunar Mare ... Posters, T pro, UHCL Figueredo P. H. Print-Only Presentations Elphic R. C.* Moon: New Views ... , Th am, Rrn. B Fincke E. M* Moon: New Views ... , M am, Rrn. B ElphicR. C. Remote Views ... Posters, Th pro, UHCL Finnegan D. Mars Channels, ... Posters, T pro, UHCL Ely J. C. Moon: New Views ... , M am, Rrn. B Fisenko A. V. Print-Only Presentations Ely J. C. Lunar Jambalaya ... Posters, T pro, UHCL Fishbaugh K. E. Mars Polar Posters, T pro, UHCL Ely J. C. Martian Meteorites ... Posters, T pm, UHCL Fisher D. K. Education Posters, T pm, UHCL Ely J. C. Martian Meteorites, F am, Rrn. C Fisher J. L. Modeling Impact ... Posters, T pro, UHCL Emery J.P. Small Body ... Posters, Th pm, UHCL Ross C. Lunar Impacts, T am, Rm. D EmryS. A. Impact ... Geology Posters Th pro, UHCL Ross C. Angrites, Eucrites ... Posters. T pm, UHCL EmryS. R. Impact ... Geophy. Posters, Th pro, UHCL Ross C.* Angrites, Eucrites, ... , W pro, Rrn. D Engrand C* The Tagish Lake ... , M am, Rrn. A Ross C. Meteorites: Composition ... , F am, Rm. B Engrand C. Cosmic Dust, Th pm, Rm. D Royd S. R. A Year NEAR Eros, T pro, Rrn. C EngrandC. Cosmic Dust Posters, Th pm, UHCL Rynn G. J. The Tagish Lake ... , M am, Rm. A Engrand C. Print-Only Presentations Rynn G. J. Tagish Lake ... Posters, T pm, UHCL ErnstR. E.* Venus: Texture ... , M pm, Rrn. B Rynn G. 1.* Cosmic Dust, Th pm, Rm. D ErnstR. E. Venus Geology ... Posters, T pro, UHCL Rynn G. J. Cosmic Dust Posters, Th pro, UHCL Ertel W.* Planetary Formation ... , Th am, Rrn. D Rynn L. Fire and Ice ... Posters, Th pro, UHCL Esposito L. W. Outer Body ... Posters, T pm, UHCL Fogel M. Astrobiology II Posters, Th pm, UHCL EsquerdoG. Mars: Subsurface Ice ... , Th am, Rm. C Fogel R. A. Angrites, Eucrites ... Posters, T pro, UHCL Estrada P. R. Outer Body Experiences, M pro, Rm. D Foing B. H. Education Posters, T pro, UHCL Eugster O. * Lunar Impacts, T am, Rm. D Foing B. H. Remote Views ... Posters, Th pm, UHCL Eugster O. Meteorites: Composition ... , F am, Rrn. B Foing B. H. Remote Views ... Posters, Th pro, UHCL Evans L. G. A Year NEAR Eros, T pm, Rrn. C Foing B. H. Print-Only Presentations Evans L. G. A Year NEAR Eros Posters, T pro, UHCL Foldi T. Education Posters, T pro, UHCL EvansN. D. Mars Surface ... II Posters, Th pm, UHCL Foldi T. Moon: New Views ... , Th am, Rrn. B EvansN. D. Missions, ... Posters, Th pro, UHCL Foldi T. Remote Views ... Posters, Th pro, UHCL Fabriczy A. Print-Only Presentations Foley C. N* Martian Soil Chemistry ... , Th pro, Rm. C Faestermann T. Meteorites: Composition ... , F am, Rrn. B Folk R. L. * Astrobiology III, F am, Rrn. A Fagan T. J. Print-Only Presentations Fonti S. Mars Channels, ... Posters, T pm, UHCL

162 32nd LPSC Program Index Fonti S. Mars Surface ... I Posters, Th pm, UHCL Gasnault O. M. Moon: New Views ... , Th am, Rm. B FooteM. Mars Volcanism Posters, T pm, UHCL Gasnault O. M. Remote Views ... Posters, Th pm, UHCL Ford H. A. Small Body ... Posters, Th pm, UHCL Gautason B. Print-Only Presentations Forget F. Frozen Mars: Polar ... , M pm, Rm. C Geissler P. Europa Surface-Subsurface ... , Th pm, Rm. A Forrnisano V. Outer Body Experiences, M pm, Rm. D GeisslerP. Fire and Ice ... Posters, Th pm, UHCL ForneyP. B. Martian Soil Chemistry ... , Th pm, Rm. C Geissler P. Europa Surface ... Posters, Th pm, UHCL Forni O. Print-Only Presentations GeisslerP. Astrobiology III, F am, Rm. A Fossen H. Mars Magnets, T pm, Rm. B Geissler P. E. Io: Inside and Out, W am, Rm. B Powell M. Print-Only Presentations Geissler P. E. Fire and Ice ... Posters, Th pm, UHCL Franchi I. A. The Tagish Lake ... , M am, Rm. A Geissler P. E. Europa Surface ... Posters, Th pm, UHCL Franchi I. A. Tagish Lake ... Posters, T pm, UHCL Gektin Yu.M Print-Only Presentations Franchi I. A. Angrites, Eucrites ... Posters, T pm, UHCL Gendaszek A. S. Mars: Wrinkled ... Posters, T pm, UHCL Franchi I. A. Small Bodies ... ,Wpm, Rm. B Genetay I. Moon: New Views ... , Th am, Rm. B Frankie S. C. Print-Only Presentations Genetay I. Remote Views ... Posters, Th pm, UHCL Franklin B. J. Mars Surface Drainage ... , W am, Rm. C GengeM. J.* Cosmic Dust, Th pm, Rm. D Franz G. A. Mars Channels, ... Posters, T pm, UHCL GeorgeJ. A. Print-Only Presentations Frawley J. J. Mars Volcanism: ... , M am, Rm. C Gerasimov M. Print-Only Presentations FreemanJ. Print-Only Presentations Gerasimov M. V.* Moon: New Views ... , M am, Rm. B Freitas K. A. Small Body ... Posters, Th pm, UHCL Gerdenich M. J. Astrobiology I, Th am, Rm. A French B. M. Impact Cratering, T pm, Rm. D Gessler P. Print-Only Presentations Frey E. L. Mars Magnets, T pm, Rm. B Gesztesi A. Print-Only Presentations Frey H. Mars Channels, ... Posters, T pm, UHCL Ghai!R. C. Venus: Texture ... , M pm, Rm. B Frey H. V.* Mars Magnets, T pm, Rm. B Ghai!R.C. Outer Body Experiences, M pm, Rm. D Frey H. V. Education Posters, T pm, UHCL GhailR.C. Venus Geology ... Posters, T pm, UHCL Frey S. Lunar Impacts, T am, Rm. D GhailR.C. Print-Only Presentations Friedmann E. I.* Astrobiology I, Th am, Rm. A GhatanG. J. Mars Volcanism Posters, T pm, UHCL Friedrich J. M. Ordinary & Enstatite ... Posters, Th pm, UHCL Ghatan G. J. Print-Only Presentations Frischauf N. Print-Only Presentations Ghosh A.* Small Bodies ... ,Wpm, Rm. B Fujimaki H. Angrites, Eucrites ... Posters, T pm, UHCL GhoshM. Mars Surface ... I Posters, Th pm, UHCL FujimuraA. Remote Views ... Posters, Th pm, UHCL Gibbons H. L. Print-Only Presentations Fuller E. R. Mars Volcanism Posters, T pm, UHCL Gibson E. K. Astrobiology I, Th am, Rm. A Gaddis L.* Moon: Remote Sensing ... , Th pm, Rm. B Gibson E. K. Jr. Martian Meteorites ... Posters, T pm, UHCL Gaddis L. Print-Only Presentations Gibson E. K. Jr. Planetary Formation ... Posters, Th pm, UHCL Gaddis L. R. Mars Volcanism Posters, T pm, UHCL Gibson R. L.* Impact Cratering, T pm, Rm. D Gaddis L. R. Lunar Mare ... Posters, T pm, UHCL Gibson R. L. Lunar Surfaces ... Posters, T pm, UHCL Gaddis L. R. Remote Views ... Posters, Th pm, UHCL Gibson R. L. Impact ... Geology Posters Th pm, UHCL Gaetani G. Planetary Formation ... , Th am, Rm. D Giese B. Outer Body Experiences, M pm, Rm. D Gaffey M. A Year NEAR Eros, T pm, Rm. C Giese B. Outer Body ... Posters, T pm, UHCL Gaffey M. J. A Year NEAR Eros, T pm, Rm. C Giese B. Print-Only Presentations Gaffey M. J. Impact Cratering, T pm, Rm. D Giguere T. A. Remote Views ... Posters, Th pm, UHCL GaffeyM. J. Asteroid-Meteorite ... Posters, T pm, UHCL Giguere T. A. Print-Only Presentations Gaffey M. J. A Year NEAR Eros Posters, T pm, UHCL Gillet P. Planetary Formation ... , Th am, Rm. D Gaffey M. J* Small Bodies ... , Wpm, Rm. B Gillet Ph. Impact Cratering, T pm, Rm. D Gaines J. K. Small Body ... Posters, Th pm, UHCL Gillet Ph. New Meteorites Posters, Th pm, UHCL G:il-Solymos K. Impact ... Geology Posters Th pm, UHCL Gillis J. J. Lunar Mare ... Posters, T pm, UHCL Galileo Imaging Team Fire and Ice ... Posters, Th pm, UHCL Gillis J. J * Moon: New Views ... , Th am, Rm. B Galileo NIMS Team lo: Inside and Out, W am, Rm. B Gillis J. J. Remote Views ... Posters, Th pm, UHCL Galileo SSI Team Outer Body ... Posters, T pm, UHCL Gillis J. J. Print-Only Presentations Galileo SSI Team Io: Inside and Out, W am, Rm. B Gilmore M. S. Impact ... Geophy. Posters, T pm, UHCL Galileo SSI Team Fire and Ice ... Posters, Th pm, UHCL Gilmour I. The Tagish Lake ... , M am, Rm. A Galileo SSI Team Print-Only Presentations Gilmour!. Tagish Lake ... Posters, T pm, UHCL GalimovE. Remote Views ... Posters, Th pm, UHCL Gilmour I. Presolar Grains, W pm, Rm. A GalimovE. Print-Only Presentations Gilmour J.D. Martian Meteorites ... Posters, T pm, UHCL Gallina R. Presolar Grains, W pm, Rm. A Gilpin L.A. Planetary Formation ... Posters, Th pm, UHCL GalyA. Chondrules, M pm, Rm. A Giorgini J.D. Small Bodies ... , W pm, Rm. B GandhokG. Impact ... Geophy. Posters, Th pm, UHCL Gitlin A. Outer Body ... Posters, T pm, UHCL Ganguly J. Lunar Jambalaya ... Posters, T pm, UHCL Gitlin A. Remote Views ... Posters, Th pm, UHCL G:intiT. Print-Only Presentations Gitlin A. R. Fire and Ice ... Posters, Th pm, UHCL Garcia D. Environmental ... Posters, T pm, UHCL Glass B. J. Impact ... Geophy. Posters, Th pm, UHCL Garcia P. A. Education Posters, T pm, UHCL Glass B. P. Impact Ejecta, T am, Rm. B Garrison D. H. Angrites, Eucrites, ... , W pm, Rm. D Glass B. P. Impact ... Geology Posters Th pm, UHCL Garrison D. H. Ordinary & Enstatite ... Posters, Th pm, UHCL Glavin D. P. Carbonaceous ... Posters, Th pm, UHCL Garry J. R. C. Outer Body ... Posters, T pm, UHCL Glavin D. P. Astrobiology II Posters, Th pm, UHCL Garvin J. B. Mars Volcanism: ... , M am, Rm. C Glaze L. S.* Mars Volcanism: ... , M am, Rm. C Garvin J. B. A Year NEAR Eros, T pm, Rm. C Glaze L. S. Venus Geology ... Posters, T pm, UHCL Garvin J. B. Mars Volcanism Posters, T pm, UHCL Glaze L. S. Io: Inside and Out, W am, Rm. B Garzarella A. Martian Canyons ... , W pm, Rm. C Gleason K. Print-Only Presentations GasnaultO. Moon: New Views ... , Th am, Rm. B Glotch T. D. Mars Surface ... II Posters, Th pm, UHCL GasnaultO. Remote Views ... Posters, Th pm, UHCL Godwin A. Cosmic Dust Posters, Th pm, UHCL Gasnault O. Remote Views ... Posters, Th pm, UHCL GohnG.S. Impact ... Geology Posters Th pm, UHCL

32nd LPSC Program Index ______l63 Gohn G. S. Impact ... Geophy. Posters, Th pm, UHCL Greenberg R. Small Body ... Posters, Th pm, UHCL GoldR. E. A Year NEAR Eros, T pm, Rm. C Greenberg R. Europa Surface ... Posters, Th pm, UHCL Golden D. C. Martian Meteorites ... Posters, T pm, UHCL Greenberg R.* Astrobiology III, F am, Rm. A Golden D. C. Mars Surface ... II Posters, Th pm, UHCL Greenwood 1. P.* Astrobiology I, Th am, Rm. A Golden D. C. Planetary Formation ... Posters, Th pm, UHCL GreggT. K. P.* Mars Volcanism: ... , M am, Rm. C Goldman M. R. Impact ... Geophy. Posters, Th pm, UHCL Gregg T. K. P. Mars: Wrinkled ... Posters, T pm, UHCL Goldsby D. L.* Outer Body Experiences, M pm, Rm. D Gregg T. K. P. Mars Volcanism Posters, T pm, UHCL Goldsby D. L. Outer Body ... Posters, T pm, UHCL GreshakeA. Print-Only Presentations Goldstein 1. I. Chondrites: Nebular ... , Tam, Rm. A Grey I. D. S.* Impact Cratering, T pm, Rm. D Goldstein 1. O. A Year NEAR Eros, T pm, Rm. C Grier D. G. Cosmic Dust, Th pm, Rm. D GolombekM. Mars Magnets, T pm, Rm. B Grier 1. Mars Volcanism Posters, T pm, UHCL GolombekM* Societal Connections ... ,Th pm, Rm. A Grieve R. A. F. Impact ... Geology Posters Th pm, UHCL GolombekM. Mars Missions Posters, Th pm, UHCL GrimmR. E. Mars Channels, ... Posters, T pm, UHCL Golombek M. P. Mars Magnets, T pm, Rm. B Grin E. A. Mars Channels, ... Posters, T pm, UHCL Golombek M. P. Mars Surface ... II Posters, Th pm, UHCL Grin E. A. Mars Surface Drainage ... , W am, Rm. C Golombek M. P. Mars Missions Posters, Th pm, UHCL Grokhovsky V. I. Meteoroids Posters, Th pm, UHCL Golombek M. P. * Mars: Looking Down ... , F am, Rm. D Grosfils E. B. Venus: Texture ... , M pm, Rm. B Goltz D. Mars Surface ... I Posters, Th pm, UHCL Grosfils E. B. Mars: Wrinkled ... Posters, T pm, UHCL Golubeva L. F. Print-Only Presentations Grosfils E. B. Mars Channels, ... Posters, T pm, UHCL Goodrich C. A. Martian Meteorites ... Posters, T pm, UHCL Grosfils E. B. Mars Volcanism Posters, T pm, UHCL Goodrich C. A.* Angrites, Eucrites, ... , W pm, Rm. D Grosfils E. B. Mars Mapping Posters, T pm, UHCL Goodrich C. A.* Martian Meteorites, F am, Rm. C Grosfils E. B. Venus Geology ... Posters, T pm, UHCL GorV. Mars Missions Posters, Th pm, UHCL Grosfils E. B.* Martian Canyons ... , W pm, Rm. C Gorenstein P. A Year NEAR Eros, T pm, Rm. C Grosfils E. B. Print-Only Presentations Gorenstein P. A Year NEAR Eros Posters, T pm, UHCL Grossman 1. N.* Chondrules, M pm, Rm. A Gorevan S. Small Bodies ... ,Wpm, Rm. B Grossman L. The Tagish Lake ... , M am, Rm. A Gorin V. D. Print-Only Presentations Grossman L. Refractory Inclusions, T pm, Rm. A Goswami 1. N. Refractory Inclusions, T pm, Rm. A GroveT. L. Moon: New Views ... , M am, Rm. B Goswami 1. N. Refractory Inclusions Posters, T pm, UHCL GroveT. L. Lunar Mare ... Posters, T pm, UHCL Goto K. Environmental ... Posters, T pm, UHCL GroveT. L. Angrites, Eucrites, ... , Wpm, Rm. D Goudy C. L. Mars: Wrinkled ... Posters, T pm, UHCL GroveT. L. Mars Surface ... II Posters, Th pm, UHCL Gounelle M. The Tagish Lake ... , M am, Rm. A Grunthaner F. Astrobiology II Posters, Th pm, UHCL Gounelle M. Carbonaceous Chondrites, W am, Rm. A Grunthaner F. 1. Print-Only Presentations Gounelle M. * Carbonaceous Chondrites, W am, Rm. A Guan Y. The Tagish Lake ... , M am, Rm. A GounelleM. Cosmic Dust, Th pm, Rm. D Guan Y. Carbonaceous Chondrites, W am, Rm. A Gounelle M. Cosmic Dust Posters, Th pm, UHCL Guertin M. Mars Surface ... I Posters, Th pm, UHCL GounelleM. Print-Only Presentations Guest1. E. Venus Geology ... Posters, T pm, UHCL Govoni1. Cosmic Dust Posters, Th pm, UHCL Guidry S. A. Astrobiology II Posters, Th pm, UHCL GradyM.M.* The Tagish Lake ... , M am, Rm. A Guidry S. A.* Astrobiology .III, F am, Rm. A GradyM.M. Angrites, Eucrites ... Posters, T pm, UHCL Guinness E. A. Mars Data ... Posters, T pm, UHCL GradyM.M. Cosmic Dust, Th pm, Rm. D Guinness E. A. Mars Surface ... I Posters, Th pm, UHCL GradyM.M. Mars Missions Posters, Th pm, UHCL Gulick V. C. Education Posters, T pm, UHCL GradyM.M. Cosmic Dust Posters, Th pm, UHCL Gulick V. C.* Mars Surface Drainage ... , W am, Rm. C GradyM.M. Print-Only Presentations Guyot F. Planetary Formation ... , Th am, Rm. D GraffT.G. Mars Surface ... II Posters, Th pm, UHCL Haack H. Chondrites: Nebular ... , Tam, Rm. A GraffT. G. Print-Only Presentations Haack H. Angrites, Eucrites, ... , Wpm, Rm. D Graham G. A. Cosmic Dust Posters, Th pm, UHCL Haberle R. M. Mars: Looking Down ... , F am, Rm. D Granahan 1. C.* lo: Inside and Out, W am, Rm. B Hackwell 1. A. Mars Surface ... I Posters, Th pm, UHCL GrandeM. Remote Views ... Posters, Th pm, UHCL Hackwell 1. A. Mars Missions Posters, Th pm, UHCL Grant C. S. Education Posters, T pm, UHCL Hagermann A. Remote Views ... Posters, Th pm, UHCL GrantJ. Mars Missions Posters, Th pm, UHCL Hagerty 1. Moon: New Views ... , M am, Rm. B Grant 1. A. Mars Channels, ... Posters, T pm, UHCL Hagerty 1. 1. Lunar Mare ... Posters, T pm, UHCL Grant1. A. Mars Surface Drainage ... , W am, Rm. C Hagerty 1. 1. Education Posters, T pm, UHCL Grant1. A. Martian Canyons ... , W pm, Rm. C Hagerty 1. 1* Mars: Subsurface Ice ... , Th am, Rm. C Grant1. A.* Mars: Subsurface Ice ... , Th am, Rm. C Hahn1. M. Cosmic Dust Posters, Th pm, UHCL Grasby S. Astrobiology II Posters, Th pm, UHCL Haldemann A. Mars Missions Posters, Th pm, UHCL Grasset O. * Outer Body Experiences, M pm, Rm. D Haldemann A. F. C. Mars Missions Posters, Th pm, UHCL Grasset O. Planetary Formation ... Posters, Th pm, UHCL Hale A. S. Moon: Remote Sensing ... , Th pm, Rm. B Grasset O. Europa Surface ... Posters, Th pm, UHCL Halekas 1. S.* Lunar Impacts, T am, Rm. D GraupG. Impact Cratering, T pm, Rm. D Hallenbeck S. L. Cosmic Dust Posters, Th pm, UHCL Greeley R. Mars Channels, ... Posters, T pm, UHCL Hallet B. Mars Polar Posters, T pm, UHCL GreeleyR. Education Posters, T pm, UHCL Hallet B. Print-Only Presentations Greeley R. Mars Surface ... II Posters, Th pm, UHCL Halliday A. N. Origins of Planet.... Posters, T pm, UHCL Greeley R. Fire and Ice ... Posters, Th pm, UHCL Halliday A. N.* Planetary Formation I, W am, Rm. D Greeley R. Europa Surface ... Posters, Th pm, UHCL HamabeY. Small Body ... Posters, Th pm, UHCL Greeley R.* Mars: Looking Down ... , F am, Rm. D HamabeY. Print-Only Presentations Greeley R. Print-Only Presentations Hamilton V. E. Mars Volcanism: ... , M am, Rm. C Greenberg R.* Europa Surface-Subsurface ... , Th pm, Rm. A Hamilton V. E* Martian Soil Chemistry ... , Th pm, Rm. C Greenberg R. Fire and Ice ... Posters, Th pm, UHCL Hamilton V. E. Mars Surface ... II Posters, Th pm, UHCL Greenberg R. Planetary Formation ... Posters, Th pm, UHCL Hamilton V. E. Mars Surface ... II Posters, Th pm, UHCL

164 32nd LPSC Program Index Hammer C. Cosmic Dust Posters, Th pm, UHCL Head J. W. III Print-Only Presentations Hand K. Astrobiology Ill, F am, Rm. A Heather D. Remote Views ... Posters, Th pm, UHCL Hansen G. B. Outer Body Experiences, M pm, Rm. D Heather D. J. Lunar Mare ... Posters, T pm, UHCL Hansen G. B. Europa Surface-Subsurface ... , Th pm, Rm. A Heather D. J. Education Posters, T pm, UHCL Hansen G. B. Mars Atmos .... Posters, Th pm, UHCL Heather D. J. Print-Only Presentations Hansen V. L. * Venus: Texture ... , M pm, Rm. B HeberV. S. Print-Only Presentations Hansen V. L. Venus Geology ... Posters, T pm, UHCL HechlerM. Mars Missions Posters, Th pm, UHCL Hapke B. W. Asteroid-Meteorite ... Posters, T pm, UHCL HechtM. H.* Mars Surface Drainage ... , W am, Rm. C Hapke B. W. Moon: Remote Sensing ... , Th pm, Rm. B HechtM. H. Print-Only Presentations HarbertW. Mars Surface Drainage ... , W am, Rm. C Hedgecock J. Astrobiology II Posters, Th pm, UHCL Harcke L. J. Outer Body ... Posters, T pm, UHCL Hegyi A. Print-Only Presentations Hardersen P. S. A Year NEAR Eros, T pm, Rm. C Hegyi S. Education Posters, T pm, UHCL Hardersen P. S.* Small Bodies ... , Wpm, Rm. B Hegyi S. Print-Only Presentations . Mars Magnets, T pm, Rm. B Reineck J. T. Modeling Impact ... Posters, T pm, UHCL HareT. M. Mars Data ... Posters, T pm, UHCL Henkel T. Carbonaceous Chondrites, W am, Rm. A HareT. M. Mars Mapping Posters, T pm, UHCL Herbert M. S. Lunar Surfaces ... Posters, T pm, UHCL HareT. M. Mars: Subsurface Ice ... , Th am, Rm. C Herd C. D. K. Martian Meteorites ... Posters, T pm, UHCL HareT. M. Mars Missions Posters, Th pm, UHCL Herd C. D. K.* Martian Meteorites, F am, Rm. C Hargitai H. Mars Channels, ... Posters, T pm, UHCL Herd R. K. Tagish Lake ... Posters, T pm, UHCL Hargitai H. I. Print-Only Presentations Herkenhoff K. E.* Frozen Mars: Polar ... , M pm, Rm. C Harmon J. K. Outer Body ... Posters, T pm, UHCL Herkenhoff K. E. Mars Surface Drainage ... , W am, Rm. C Harris A. J. L. Fire and Ice ... Posters, Th pm, UHCL Herpers U. Presolar Grains, W pm, Rm. A Harris B. A. Venus Geology ... Posters, T pm, UHCL HerrK. C. Martian Soil Chemistry ... , Th pm, Rm. C Harrison K. P. Mars Channels, ... Posters, T pm, UHCL HerrK. C. Mars Surface ... I Posters, Th pro, UHCL Hartmann W. K. Mars Channels, ... Posters, T pm, UHCL HerrK. C. Mars Missions Posters, Th pro, UHCL Hartmann W. K. Mars Volcanism Posters, T pm, UHCL Herrick R. R. * Impact Cratering, T pro, Rm. D Hartmann W. K. * Mars: Subsurface Ice ... , Th am, Rm. C Herrick R. R. Impact ... Mars Posters, T pm, UHCL Hartmann W. K. Mars Surface ... II Posters, Th pm, UHCL Herzog G. F. Cosmic Dust, Th pm, Rm. D Haruyama J. Remote Views ... Posters, Th pm, UHCL Herzog G. F. Impact ... Geology Posters Th pm, UHCL Harvey R. P.* Chondrites: Nebular ... ,Tam, Rm. A Herzog G. F. Iron Meteorites Posters, Th pro, UHCL HarveyR. P. Cosmic Dust, Th pm, Rm. D Herzog G. F.* Meteorites: Composition ... , F am, Rm. B Hasiotis S. T. Astrobiology II Posters, Th pm, UHCL Hess P. C.* Mars Geophysics, T am, Rm. C Haskin L. Mars Missions Posters, Th pm, UHCL Hess P. C. Lunar Mare ... Posters, T pro, UHCL Haskin L. A.* Lunar Impacts, T am, Rm. D Hess P. C. Print-Only ·Presentations Haskin L.A. Lunar Surfaces ... Posters, T pm, UHCL Hewins R. H. Chondrites: Nebular ... , T am, Rm. A Haskin L.A. Astrobiology I, Th am, Rm. A Hibbitts C. A.* Outer Body Experiences, M pro, Rm. D Haskin L.A. Mars Missions Posters, Th pm, UHCL Hibbitts C. A. Europa Surface-Subsurface ... , Th pm, Rm. A Haskin L.A. Print-Only Presentations HicksT. L. Education Posters, T pm, UHCL Hassings R. Cosmic Dust Posters, Th pm, UHCL Hiesinger H.* Moon: New Views ... , M am, Rm. B Hatton C. Impact ... Geology Posters Th pm, UHCL Hiesinger H. Mars Volcanism Posters, T pm, UHCL Hauber E. Mars Missions Posters, Th pm, UHCL Hiesinger H. Mars Mapping Posters, T pm, UHCL Hauck S. A. II Mercury ... Posters, T pm, UHCL Hiesinger H. Lunar Mare ... Posters, T pm, UHCL HauriE. Martian Meteorites, F am, Rm. C Hiesinger H. Mars Missions Posters, Th pro, UHCL HauriE. H. Meteorites: Isotopic ... Posters, Th pm, UHCL Hiesinger H. Print-Only Presentations Hawke B. R. Moon: New Views ... , M am, Rm. B HigaM. Remote Views ... Posters, Th pm, UHCL Hawke B. R. Lunar Mare ... Posters, T pm, UHCL HigaM. Planetary Formation ... Posters, Th pro, UHCL Hawke B. R.* Moon: Remote Sensing ... , Th pm, Rm. B Hildebrand A. R. Small Body ... Posters, Th pro, UHCL Hawke B. R. Remote Views ... Posters, Th pm, UHCL Hill D. H. Angrites, Eucrites, ... , W pro, Rm. D Hawke B. R. Print-Only Presentations Hill H. G. M. Astrobiology I, Th am, Rm. A Hawke B. R. Moon: Remote Sensing ... , Th pm, Rm. B Hill H. G. M. Cosmic Dust, Th pm, Rm. D HayakawaM. Remote Views ... Posters, Th pm, UHCL Hill H. H. Astrobiology II Posters, Th pro, UHCL HeadJ. N.* Impact Cratering, T pm, Rm. D Hinrichs J. L. * A Year NEAR Eros, T pro, Rm. C Head J. W. III Moon: New Views ... , M am, Rm. B Hinrichs J. L. Print-Only Presentations Head J. W. III Mars Volcanism: ... , M am, Rm. C Hirai K. Refractory Inclusions Posters, T pro, UHCL Head J. W. III Venus: Texture ... , M pm, Rm. B HirataN. Remote Views ... Posters, Th pm, UHCL Head J. W. III Frozen Mars: Polar ... , M pm, Rm. C HiroiT. Asteroid-Meteorite ... Posters, T pro, UHCL Head J. W. III Outer Body Experiences, M pm, Rm. D Hiroi T. Small Body ... Posters, Th pro, UHCL HeadJ. W. III Mars Geophysics, T am, Rm. C Hiroi T. Print-Only Presentations Head J. W. III* Mars Magnets, T pm, Rm. B HittleJ. D. Missions, ... Posters, Th pm, UHCL HeadJ. W.III Mars: Wrinkled ... Posters, T pm, UHCL HiyagonH. Refractory Inclusions Posters, T pro, UHCL HeadJ. W.III Mars Polar Posters, T pm, UHCL Hoefen T. M. * Martian Soil Chemistry ... , Th pm, Rm. C Head J. W. III Mars Volcanism Posters, T pm, UHCL Hoffman E. Carbonaceous ... Posters, Th pm, UHCL Head J. W. III Mars Mapping Posters, T pm, UHCL HoffmanN. Mars: Wrinkled ... Posters, T pm, UHCL Head J. W. III Outer Body ... Posters, T pm, UHCL HoffmanN. Mars: Small Scale ... Posters, T pro, UHCL Head J. W. III Venus Geology ... Posters, T pm, UHCL HoffmanN. Mars Atmos .... Posters, Th pro, UHCL Head J. W. III Lunar Mare ... Posters, T pm, UHCL HoffmanN. Mars Missions Posters, Th pm, UHCL Head J. W. III Europa Surface-Subsurface ... , Th pm, Rm. A HoffmanN. Print-Only Presentations HeadJ. W. III Moon: Remote Sensing ... , Th pm, Rm. B Hoffmann H. Mars Missions Posters, Th pro, UHCL HeadJ. W. III Mars Missions Posters, Th pm, UHCL Hofmann B. Mars Missions Posters, Th pro, UHCL Head J. W. III Europa Surface ... Posters, Th pm, UHCL Hogan R. C. Small Bodies ... , W pm, Rm. B

32nd LPSC Program lndex ______165 Hogenboom D. L.* Outer Body Experiences, M pm, Rm. D Ipatov S. I. Print-Only Presentations Hogenboom D. L. Print-Only Presentations Irwin R. P. Ill Mars Channels, ... Posters, T pm, UHCL Hohenberg C. M. Carbonaceous Chondrites, W am, Rm. A Isbell C. E. Remote Views ... Posters, Th pm, UHCL Hohenberg C. M. Presolar Grains, W pm, Rm. A Ishii T. Meteorites: Composition ... , F am, Rm. B Holba A. Print-Only Presentations Ito M.* Refractory Inclusions, T pm, Rm. A Holland G. Martian Meteorites ... Posters, T pm, UHCL Itoh S. Refractory Inclusions, T pm, Rm. A Holloway J. R. Mars Surface ... II Posters, Th pm, UHCL Iturralde-Vinent M. A. Environmental ... Posters, T pm, UHCL Holsapple K. A.* Small Bodies ... , W pm, Rm. B Ivanov A. B* Mars: Looking Down ... , F am, Rm. D Boltzmann J.* Moon: Remote Sensing ... , Th pm, Rm. B Ivanov A. V. Print-Only Presentations Boltzmann J. Remote Views ... Posters, Th pm, UHCL Ivanov B. A. Modeling Impact ... Posters, T pm, UHCL Hood L. L.* Chondrules, M pm, Rm. A Ivanov B. A. Impact ... Mars Posters, T pm, UHCL Hood L. L.* Mars Geophysics, T am, Rm. C Ivanov B. A.* Mars: Subsurface Ice ... , Th am, Rm. C Hood L. L. Lunar Impacts, T am, Rm. D Ivanov B. A. Impact ... Geology Posters Th pm, UHCL Hood L. L. Chondrules Posters, T pm, UHCL lvanovM. A. Venus Geology ... Posters, Tpm, UHCL Hoover R. Astrobiology II Posters, Th pm, UHCL IvanovM. A. Print-Only Presentations Hoppa G. V. Europa Surface-Subsurface... , Th pm, Rm. A IvanovaM. Martian Meteorites, F am, Rm. C Hoppa G. V. Astrobiology III, F am, Rm. A Ivanova M. A. Refractory Inclusions Posters, T pm, UHCL HoppeP. Presolar Grains, W pm, Rm. A Ivanova M. A. Carbonaceous ... Posters, Th pm, UHCL HoranM. F.* Planetary Formation ... , Th am, Rm. D lvanova M. A. New Meteorites Posters, Th pm, UHCL Horiinyi M. Lunar Surfaces ... Posters, T pm, UHCL Ivanova M. A. Print -Only Presentations HomeckG. Astrobiology II Posters, Th pm, UHCL Iversen J.D. Print-Only Presentations Horton K. A. Missions, ... Posters, Th pm, UHCL lvliev A. I. Print-Only Presentations Hortswood M. Meteorites: Isotopic ... Posters, Th pm, UHCL IzenbergN. R.* A Year NEAR Eros, T pm, Rm. C Horvath A. Print-Only Presentations Izett G. A. Impact ... Geology Posters Th pm, UHCL Horz F. Martian Soil Chemistry ... , Th pm, Rm. C Jackel A. Carbonaceous ... Posters, Th pm, UHCL Horz F. Cosmic Dust Posters, Th pm, UHCL Jackson T. L. The Tagish Lake ... , M am, Rm. A Horz F. Meteoroids Posters, Th pm, UHCL Jackson T. L. Carbonaceous Chondrites, W am, Rrn. A Horz F. Shock Processes ... Posters, Th pm, UHCL Jacobsen C. Tagish Lake ... Posters, T pm, UHCL Housen K. R. * Small Bodies ... , W pm, Rm. B Jacobsen C. Cosmic Dust, Th pm, Rm. D Housley R. M. Carbonaceous ... Posters, Th pm, UHCL Jacobsen S. B.* Planetary Formation I, W am, Rm. D Howard A. D. Mars Channels, ... Posters, T pm, UHCL Jaeger W. L.* Io: Inside and Out, W am, Rm. B Howell E. S. Small Bodies ... , W pm, Rm. B JaegerW. L. Fire and Ice ... Posters, Th pm, UHCL Howell E. S. Small Body ... Posters, Th pm, UHCL Jagoutz E.* Martian Meteorites, F am, Rm. C Howel!R. R. Io: Inside and Out, W am, Rm. B Jain J. C. Moon: New Views ... , M am, Rm. B Howington-Kraus E. Mars Mapping Posters, T pm, UHCL Jain J. C. Lunar Jambalaya ... Posters, T pm, UHCL HuaX.* Chondrules, M pm, Rm. A Jain J. C. Martian Meteorites ... Posters, T pm, UHCL HuaX. Meteorites: Isotopic ... Posters, Th pm, UHCL Jain J. C. Martian Meteorites, F am, Rm. C HuardJ. J. Lunar Impacts, T am, Rm. D Jakosky B. M* Mars: Subsurface Ice ... , Th am, Rm. C Hubble H. W. Mars Surface ... I Posters, Th pm, UHCL Jakosky B. M* Societal Connections ... ,Th pm, Rm. A Hughes S. S.* Planetary Formation I, W am, Rm. D Jakosky B. M. Mars: Looking Down ... , F am, Rm. D HumayunM.* Chondrites: Nebular ... ,Tam, Rm. A Jambon A. New Meteorites Posters, Th pm, UHCL HumayunM. Iron Meteorites Posters, Th pm, UHCL James P. B. Print-Only Presentations Humphries R. Mars Volcanism Posters, T pm, UHCL Jangam P. Origins of Planet.... Posters, T pm, UHCL AuntP. A. Tagish Lake ... Posters, T pm, UHCL Jarvis K. S. * Small Bodies ... , Wpm, Rm. B Hurford T. A. Planetary Formation ... Posters, Th pm, UHCL JaumannR. Outer Body Experiences, M pm, Rm. D Husmann H. Europa Surface-Subsurface... , Th pm, Rm. A Jaumann R. Mars Volcanism Posters, T pm, UHCL Huss G. R. Refractory Inclusions, T pm, Rm. A Jaumann R. Mars Missions Posters, Th pm, UHCL Huss G. R.* Presolar Grains, W pm, Rm. A JavoyM. New Meteorites Posters, Th pm, UHCL HussG. R. Meteorites: Isotopic ... Posters, Th pm, UHCL Jensen E. A. Fire and Ice ... Posters, Th pm, UHCL Hutcheon I. D. Refractory Inclusions, T pm, Rm. A Jepsen P. L. Mars Missions Posters, Th pm, UHCL Hutcheon I. D. Carbonaceous Chondrites, W am, Rm. A Jessberger E. K. Carbonaceous Chondrites, W am, Rm. A Hutcheon I. D. New Meteorites Posters, Th pm, UHCL Jessberger E. K. Cosmic Dust Posters, Th pm, UHCL HuthJ. Moon: New Views ... , M am, Rm. B Johnson C. M. Astrobiology I, Th am, Rm. A Hvidberg C. S.* Frozen Mars: Polar ... , M pm, Rm. C Johnson E. Impact Cratering, T pm, Rm. D Hviid S. F. Mars Surface ... II Posters, Th pm, UHCL Johnson G. H. Impact ... Geology Posters Th pm, UHCL Hviid S. F. Mars Missions Posters, Th pm, UHCL Johnson G. H. Impact ... Geophy. Posters, Th pm, UHCL HydeT. W. Outer Body ... Posters, T pm, UHCL Johnson J. Mars Surface ... II Posters, Th pm, UHCL HydeT. W. Origins of Planet. ... Posters, T pm, UHCL Johnson J. R. Moon: New Views ... , Th am, Rm. B HydeT. W. Print-Only Presentations Johnson J. R* Martian Soil Chemistry ... , Th pm, Rm. C Hynek B. M. Mars Mapping Posters, T prn, UHCL Johnson J. R. Remote Views ... Posters, Th pm, UHCL Hynek B. M.* Martian Canyons ... ,Wpm, Rm. C Johnson J. R. Mars: Looking Down ... , F am, Rm. D Ianakiev K. D. Missions, ... Posters, Th pm, UHCL Johnson J. R. Print-Only Presentations ICEUM4 Participants Print-Only Presentations Johnson K T. M. Education Posters, T pm, UHCL ILEWG Remote Views ... Posters, Th pm, UHCL Johnson T.V. Io: Inside and Out, W am, Rm. B Imai H.* Refractory Inclusions, T pm, Rm. A Johnson T.V.* Europa Surface-Subsurface ... , Th pm, Rm. A Imamura F. Mars Channels, ... Posters, T pm, UHCL Johnson W. T. K. Mars Missions Posters, Th pm, UHCL Immel G. Cosmic Dust Posters, Th pm, UHCL Jolliff B. Moon: Remote Sensing ... , Th pm, Rrn. B lnaba H. Chondrites: Nebular ... ,Tam, Rm. A Jolliff B. Mars Missions Posters, Th pm, UHCL InabaS.* Origins of Planetary ... , M am, Rm. D Jolliff B. L. Print-Only Presentations Ingersoll A. P. Mars Atmos .... Posters, Th pm, UHCL Jolliff B. L. Moon: New Views ... , M am, Rm. B

166 32nd LPSC Program Index Jolliff B. L. Lunar Impacts, T am, Rm. D Kaydash V. G. Moon: Remote Sensing ... , Th pm, Rm. B Jolliff B. L. Lunar Mare ... Posters, T pm, UHCL Kearsley A. T. Cosmic Dust Posters, Th pm, UHCL Jolliff B. L. Lunar Surfaces ... Posters, T pm, UHCL Kedves M. Impact Cratering, T pm, Rm. D Jolliff B. L. Astrobiology I, Th am, Rm. A KehmK. Meteorites: Isotopic ... Posters, Th pm, UHCL Jolliff B. L. * Moon: New Views ... , Th am, Rm. B KeilK. Chondrites: Nebular ... , Tam, Rm. A Jolliff B. L. Mars Surface ... I Posters, Th pm, UHCL Keil K. Refractory Inclusions, T pm, Rm. A Jolliff B. L. Mars Missions Posters, Th pm, UHCL Keil K. Refractory Inclusions Posters, T pm, UHCL Jolliff B. L. Remote Views ... Posters, Th pm, UHCL Keil K. Meteorites: Composition ... , F am, Rm. B Jolliff B. L. Print-Only Presentations Keil K. Print-Only Presentations Jones A. P. Impact Cratering, T pm, Rm. D KeimE. R. Mars Surface ... I Posters, Th pm, UHCL Jones C. G. Cosmic Dust Posters, Th pm, UHCL KeimE. R. Mars Missions Posters, Th pm, UHCL Jones D. T. L. Lunar Surfaces ... Posters, T pm, UHCL Keller D. Mars Surface ... II Posters, Th pm, UHCL Jones J. H. Martian Meteorites ... Posters, T pm, UHCL Keller H. U. Mars Surface ... II Posters, Th pm, UHCL Jones J. H. Planetary Formation ... , Th am, Rm. D Keller H. U. Mars Missions Posters, Th pm, UHCL Jones J. H. Planetary Formation ... Posters, Th pm, UHCL Keller L. P.* The Tagish Lake ... , M am, Rm. A Jones R. H.* Chondrules, M pm, Rm. A Keller L. P. Tagish Lake ... Posters, T pm, UHCL Jones R. H. Education Posters, T pm, UHCL Keller L. P. * Moon: New Views ... , Th am, Rm. B Jones S. M. Missions, ... Posters, Th pm, UHCL Keller L. P. Cosmic Dust, Th pm, Rm. D Jons H.-P. Mars: Small Scale ... Posters, T pm, UHCL Keller L. P. Print-Only Presentations Joseph J. A Year NEAR Eros, T pm, Rm. C Kelley M.S.* A Year NEAR Eros, T pm, Rm. C Joseph J. A Year NEAR Eros Posters, T pm, UHCL Kelley M.S. Small Bodies ... , Wpm, Rm. B Josset J. Mars Missions Posters, Th pm, UHCL KellyT. F. Missions, ... Posters, Th pm, UHCL Joswiak D. J. Cosmic Dust, Th pm, Rm. D Kelsey C. M. Print-Only Presentations Joswiak D. J. Cosmic Dust Posters, Th pm, UHCL KenkmannT. Print-Only Presentations Joswiak D. O. Cosmic Dust, Th pm, Rm. D KenKnight C. E. Origins of Planet.... Posters, T pm, UHCL Jotter R. Martian Meteorites, F am, Rm. C Keresztesi M. Print-Only Presentations J6zsa S. Impact ... Geology Posters Th pm, UHCL Kereszturi A. Mars Channels, ... Posters, T pm, UHCL J6zsa S. Print-Only Presentations Kerridge J. F. Print-Only Presentations Jull A. J. T. Lunar Surfaces ... Posters, T pm, UHCL Keszthelyi L. * Mars Volcanism: ... , M am, Rm. C JuliA. J. T. Meteorites: Composition ... , F am, Rm. B Keszthelyi L. Fire and Ice ... Posters, Th pm, UHCL JurdyD. M. Venus Geology ... Posters, T pm, UHCL Keszthelyi L. P. Io: Inside and Out, W am, Rm. B Jurena D. J* Impact Cratering, T pm, Rm. D Keszthelyi L. P. Fire and Ice ... Posters, Th pm, UHCL Jurgens R. F. Outer Body ... Posters, T pm, UHCL Kettrup B. Impact ... Geology Posters Th pm, UHCL Jurgens R. F. Venus Geology ... Posters, T pm, UHCL Kettrup B. Print-Only Presentations Jurgens R. F. Small Bodies ... , Wpm, Rm. B Kettrup D. Cosmic Dust Posters, Th pm, UHCL Jurgens R. F. Mars Missions Posters, Th pm, UHCL Kettrup D. Print-Only Presentations Jurgens R. F. Print-Only Presentations Khan A. Lunar Jambalaya ... Posters, T pm, UHCL Kabai S. Print-Only Presentations Khazins V. M. Meteoroids Posters, Th pm, UHCL Kadel S. D. Education Posters, T pm, UHCL Khurana K. K. Print-Only Presentations Kagi H. Carbonaceous Chondrites, W am, Rm. A Kiefer W. S.* Mars Geophysics, T am, Rm. C Kakuda R. Y. Missions, ... Posters, Th pm, UHCL KieferW. S. Venus Geology ... Posters, T pm, UHCL Kalinina G. V. Print-Only Presentations Kieffer H. H. Mars Surface Drainage ... , W am, Rm. C Kallemeyn G. Print-Only Presentations Kieffer S. W. Fire and Ice ... Posters, Th pm, UHCL Kallemeyn G. W * Chondrites: Nebular ... , Tam, Rm. A Killen R. M. A Year NEAR Eros Posters, T pm, UHCL Kallemeyn G. W. Angrites, Eucrites, ... , Wpm, Rm. D Killgore M. Angrites, Eucrites, ... , Wpm, Rm. D Kallemeyn G. W. Print-Only Presentations KimJ. R. Mars Data ... Posters, T pm, UHCL Kallianpur K. Mars Volcanism Posters, T pm, UHCL KimJ. R. Mars Missions Posters, Th pm, UHCL KampL. W. lo: Inside and Out, W am, Rm. B KingJ. D. Mars: Small Scale ... Posters, T pm, UHCL Kaneda K. Angrites, Eucrites ... Posters, T pm, UHCL KingJ. D. Print-Only Presentations Kanefsky B. Education Posters, T pm, UHCL King P. J. A Year NEAR Eros, T pm, Rm. C Kanik I. Astrobiology II Posters, Th pm, UHCL Kirk R. Mars Mapping Posters, T pm, UHCL Kapartis S. Mars Missions Posters, Th pm, UHCL Kirk R. L. Frozen Mars: Polar ... , M pm, Rm. C Kargel J. S.* Frozen Mars: Polar ... , M pm, Rm. C Kirk R. L. Mars Data ... Posters, T pm, UHCL Kargel J. S. Outer Body Experiences, M pm, Rm. D Kirk R. L. Mars Mapping Posters, T pm, UHCL Kargel J. S. Mars Surface Drainage ... , W am, Rm. C Kirk R. L. Outer Body ... Posters, T pm, UHCL Kargel J. S. Fire and Ice ... Posters, Th pm, UHCL Kirk R. L. Fire and Ice ... Posters, Th pm, UHCL Kargel J. S. Europa Surface ... Posters, Th pm, UHCL Kirk R. L. Europa Surface ... Posters, Th pm, UHCL KargelJ.S. Print-Only Presentations Kirk R. L. Print-Only Presentations Karner J. M. Education Posters, T pm, UHCL Kirkland L. E.* Martian Soil Chemistry ... , Th pm, Rm. C Karner J. M.* Planetary Formation I, W am, Rm. D Kirkland L. E. Mars Surface ... I Posters, Th pm, UHCL Karner J. M. Print-Only Presentations Kirkland L. E. Mars Surface ... II Posters, Th pm, UHCL Karsai J. Print-Only Presentations Kirkland L. E. Mars Missions Posters, Th pm, UHCL Kasama T. Tagish Lake ... Posters, T pm, UHCL Kirschvink J. L. Astrobiology I, Th am, Rm. A Kasarna T. Angrites, Eucrites ... Posters, T pm, UHCL Kirschvink J. L. Martian Meteorites, F am, Rm. C Kashiv Y. Presolar Grains, W pm, Rm. A Kisters A. Impact ... Geology Posters Th pm, UHCL Kashiv Y. Meteorites: Isotopic ... Posters, Th pm, UHCL KitamotoS. Missions, ... Posters, Th pm, UHCL Kashkarov L. L. Print-Only Presentations KiyokawaS. Environmental ... Posters, T pm, UHCL Kass D. Mars Missions Posters, Th pm, UHCL Klandrud S. E. Lunar Surfaces ... Posters, T pm, UHCL KatoM. Missions, ... Posters, Th pm, UHCL Klandrud S. E. Meteorites: Composition ... , F am, Rm. B Kattenhom S. A. Fire and Ice ... Posters, Th pm, UHCL KlaueB. Carbonaceous Chondrites, W am, Rm. A

32nd LPSC Program Index ______167 Klemaszewski J. Outer Body Experiences, M pm, Rm. D Kreslavsky M.A. Print-Only Presentations Klemaszewski J. E. Fire and Ice ... Posters, Th pm, UHCL Kress M. Cosmic Dust, Th pm, Rm. D Kletetschka G. Chondrules Posters, T pm, UHCL KressM. E. Origins of Planet .... Posters, T pm, UHCL Klock W. Cosmic Dust Posters, Th pm, UHCL Kring D. A.* Impact Ejecta, Tam, Rm. B Klug S. L. Education Posters, T pm, UHCL Kring D. A. Environmental ... Posters, T pm, UHCL KminekG.* Astrobiology I, Th am, Rm. A Kring D. A. Print-Only Presentations KminekG. Carbonaceous ... Posters, Th pm, UHCL KrotA. N. Chondrites: Nebular ... , Tam, Rm. A KminekG. Astrobiology II Posters, Th pm, UHCL KrotA. N.* Refractory Inclusions, T pm, Rm. A Knie K. Meteorites: Composition ... , F am, Rm. B Krot A. N. Refractory Inclusions Posters, T pm, UHCL Knocke P. Mars Missions Posters, Th pm, UHCL Kruger F. J. Impact Ejecta, Tam, Rm. B KobatakeH. Chondrules Posters, T pm, UHCL Kruger F. J. Shock Processes ... Posters, Th pm, UHCL Kobatake H. Cosmic Dust Posters, Th pm, UHCL Kucinskas A. B. Mars Geophysics, T am, Rm. C Kochan H. Small Bodies ... , W pm, Rm. B KudoT. Planetary Formation ... Posters, Th pm, UHCL Koeberl C.* Impact Ejecta, Tam, Rm. B Kuebler K. E. Astrobiology I, Th am, Rm. A Koeberl C. Impact Cratering, T pm, Rm. D Kuebler K. E. Mars Missions Posters, Th pm, UHCL Koeberl C. Lunar Surfaces ... Posters, T pm, UHCL Kuebler K. E. Print-Only Presentations Koeberl C. Impact ... Geology Posters Th pm, UHCL Kuhlman K. Mars Surface ... II Posters, Th pm, UHCL Kohlstedt D. L. Outer Body ... Posters, T pm, UHCL K11hlman K. R. Mars Surface ... II Posters, Th pm, UHCL KoizumiE. Martian Meteorites, F am, Rm. C Kuhlman K. R. Missions, ... Posters, Th pm, UHCL Kojima T.* Chondrites: Nebular ... , Tam, Rm. A Kunihiro T. * Refractory Inclusions, T pm, Rm. A KolbE. J. Mars Mapping Posters, T pm, UHCL Kurahashi E. Small Body ... Posters, Th pm, UHCL Kollar S. Martian Soil Chemistry ... , Th pm, Rm. C Kurahashi E. Print-Only Presentations Kollar S. Mars Surface ... I Posters, Th pm, UHCL KuramotoK. Planetary Formation ... , Th am, Rm. D Komatsu G. Mars Volcanism: ... , M am, Rm. C KuratG. Angrites, Eucrites ... Posters, T pm, UHCL Komatsu G. Mars: Small Scale ... Posters, T pm, UHCL KuratG.* Angrites, Eucrites, ... , W pm, Rm. D Komatsu G.* Martian Canyons ... , W pm, Rm. C KuratG. Cosmic Dust Posters, Th pm, UHCL Komatsu G. Mars Surface ... II Posters, Th pm, UHCL KuratG. Print-Only Presentations KomatsuM. Asteroid-Meteorite ... Posters, T pm, UHCL Kurtz M. J. Education Posters, T pm, UHCL Kononkova N. N. Print-Only Presentations KusakabeM. New Meteorites Posters, Th pm, UHCL Korchuganov B. Print-Only Presentations KuschnigR. Small Body ... Posters, Th pm, UHCL Koris A. Education Posters, T pm, UHCL KusinaM. S. Meteoroids Posters, Th pm, UHCL KometK* Origins of Planetary ... , M am, Rm. D KuzminR. O. Small Bodies ... , W pm, Rm. B Korokhin V. V. Print-Only Presentations KuzminR. O. Mars: Looking Down ... , F am, Rm. D Korotev R. L* Moon: New Views ... , M am, Rm. B KuzminR. O. Print-Only Presentations Korotev R. L. Lunar Impacts, T am, Rm. D LaiB. Meteorites: Isotopic ... Posters, Th pm, UHCL Korotev R. L. Lunar Surfaces ... Posters, T pm, UHCL Laity J. E. Print-Only Presentations Korotev R. L. Moon: New Views ... , Th am, Rm. B Lana C. Impact ... Geology Posters Th pm, UHCL Korotev R. L. Print-Only Presentations Lanagan P. D. Mars Mapping Posters, T pm, UHCL Korschinek G. Meteorites: Composition ... , F am, Rm. B Lane A. Mars Missions Posters, Th pm, UHCL Kortenkamp S. J. Origins of Planetary ... , M am, Rm. D LaneM. D. Mars Surface ... II Posters, Th pm, UHCL Kortz B. E. Mars Volcanism: ... , M am, Rm. C Langen K. Lunar Surfaces ... Posters, T pm, UHCL Kortz B. E. Venus Geology ... Posters, Tpm, UHCL Langevin Y. Outer Body Experiences, M pm, Rm. D Korycansky D. G. Small Body ... Posters, Th pm, UHCL Langevin Y. Moon: New Views ... , Th am, Rm. B Kosarev I. B. Meteoroids Posters, Th pm, UHCL Langevin Y. Print-Only Presentations Kostama V -P. Venus Geology ... Posters, T pm, UHCL Langlais B. Mars Magnets, T pm, Rm. B Kostama V-P. Print-Only Presentations Lanz J. K. Mars Volcanism Posters, T pm, UHCL Kotova I. V. Print-Only Presentations Lanzirotti A. Cosmic Dust Posters, Th pm, UHCL Kouchi A. Planetary Formation ... Posters, Th pm, UHCL Lapeyrere V. Missions, ... Posters, Th pm, UHCL Kovacs B. Education Posters, T pm, UHCL Larsen K. W. Mars Missions Posters, Th pm, UHCL Kovacs T. Education Posters, T pm, UHCL Larson S.M. Small Body ... Posters, Th pm, UHCL Kovacs Zs. I. Education Posters, T pm, UHCL Latti E. Lunar Surfaces ... Posters, T pm, UHCL Kovacs Zs. I. Print-Only Presentations Lauer H. V. Jr. Martian Meteorites ... Posters, T pm, UHCL Kavan 1. E. Education Posters, T pm, UHCL Lauer H. V. Jr. Mars Surface ... II Posters, Th pm, UHCL Koziol A.M. Martian Meteorites ... Posters, T pm, UHCL Lauer H. V. Jr. Planetary Formation ... Posters, Th pm, UHCL Kozlov E. A. Meteoroids Posters, Th pm, UHCL Lauretta D. S. Chondrites: Nebular ... , Tam, Rm. A Kozlova E. A. Print-Only Presentations Lauretta D. S.* Carbonaceous Chondrites, W am, Rm. A KraftM. D. Print-Only Presentations Lavery D. B. Astrobiology II Posters, Th pm, UHCL Kramer G. M. Print-Only Presentations Lavielle B. New Meteorites Posters, Th pm, UHCL Kramers J. Lunar Impacts, Tam, Rm. D Lavoie S. K. Mars Missions Posters, Th pm, UHCL Krassilnikov A. S. Venus Geology ... Posters, T pm, UHCL Lavrentjeva Z. A. Print-Only Presentations KrauseM. O. Print-Only Presentations La vrukhina A. K. Print-Only Presentations Kremser D. T. Lunar Impacts, Tam, Rm. D Lawrence D. Remote Views ... Posters, Th pm, UHCL Kremser D. T. Lunar Surfaces ... Posters, T pm, UHCL Lawrence D. J. Moon: New Views ... , M am, Rm. B Krenn K. M. Martian Soil Chemistry ... , Th pm, Rm. C Lawrence D. J. Lunar Mare ... Posters, T pm, UHCL Krenn K. M. Mars Surface ... I Posters, Th pm, UHCL Lawrence D. J.* Moon: New Views ... , Th am, Rm. B Kreslavsky M.A.* Mars Magnets, T pm, Rm. B Lawrence D. J. Moon: Remote Sensing ... , Th pm, Rm. B Kreslavsky M. A. Mars Volcanism Posters, T pm, UHCL Lawrence D. J. Remote Views ... Posters, Th pm, UHCL Kreslavsky M. A. Venus Geology ... Posters, T pm, UHCL Lawrence S. Angrites, Eucrites ... Posters, T pm, UHCL Kreslavsky M. A* Moon: Remote Sensing ... , Th pm, Rm. B Lawson S. L.* Moon: New Views ... , M am, Rm. B Kreslavsky M. A. Remote Views ... Posters, Th pm, UHCL Lawson S. L. Moon: New Views ... , Th am, Rm. B

168 32nd LPSC Program Index LeL. Martian Soil Chemistry ... , Th pm, Rm. C Lopez I. Print-Only Presentations LeL. Carbonaceous ... Posters, Th pm, UHCL Lorenz C. Print-Only Presentations Le L. Martian Meteorites, F am, Rm. C Lorenz R. D.* Outer Body Experiences, M pm, Rm. D Leach S. Print-Only Presentations LorenzR. D. Missions, ... Posters, Th pm, UHCL Leake M.A. Small Body ... Posters, Th pm, UHCL LoveS. Cosmic Dust, Th pm, Rm. D Leavens P. B. Impact ... Geology Posters Th pm, UHCL LoveS. G. Chondrules Posters, T pm, UHCL Lederer S.M. Small Body ... Posters, Th pm, UHCL LoveS. G. Angrites, Eucrites, ... , Wpm, Rm. D LeeE.M. Mars Mapping Posters, T pm, UHCL Lucchitta B. K. Mars: Small Scale ... Posters, T pm, UHCL LeeE.M. Remote Views ... Posters, Th pm, UHCL Lucchitta B. K.* Martian Canyons ... , W pm, Rm. C LeeM. T. Angrites, Eucrites, ... , W pm, Rm. D Lucey P. A Year NEAR Eros Posters, T pm, UHCL LeeP.* Frozen Mars: Polar ... , M pm, Rm. C Lucey P. Remote Views ... Posters, Th pm, UHCL LeeP. Impact ... Geophy. Posters, Th pm, UHCL Lucey P. G. Moon: New Views ... , M am, Rm. B LeeP. Astrobiology Ill, F am, Rm. A LuceyP. G. A Year NEAR Eros, T pm, Rm. C LeeW. Mars Missions Posters, Th pm, UHCL LuceyP. G. Moon: New Views ... , Th am, Rm. B Leinhardt Z. M. * Origins of Planetary ... , M am, Rm. D LuceyP. G. Moon: Remote Sensing ... , Th pm, Rm. B Le Mouelic S. * Moon: New Views ... , Th am, Rm. B LuceyP. G. Martian Soil Chemistry ... , Th pm, Rm. C Le Mouelic S. Print-Only Presentations Lucey P. G. Mars Surface ... I Posters, Th pm, UHCL Lentz R. C. F. Martian Meteorites ... Posters, T pm, UHCL LuceyP. G. Missions, ... Posters, Th pm, UHCL Lentz R. C. F. Martian Meteorites, F am, Rm. C LuceyP. G. Remote Views ... Posters, Th pm, UHCL Leon N.J. Education Posters, T pm, UHCL Lucey P. G. Print-Only Presentations Leone G. Mars Channels, ... Posters, T pm, UHCL LuckJ. M. Meteorites: Isotopic ... Posters, Th pm, UHCL Leone G. Fire and Ice ... Posters, Th pm, UHCL LugaroM. Presolar Grains, W pm, Rm. A LepperK. Mars Surface ... I Posters, Th pm, UHCL LugmairG. W. Meteorites: Composition ... , F am, Rm. B Leroux H. Impact ... Geology Posters Th pm, UHCL Lukacs B. Print-Only Presentations Leshin L. A.* The Tagish Lake ... , M am, Rm. A LunineJ. I. Mars Surface Drainage ... , W am, Rm. C Leshin L.A. Carbonaceous Chondrites, W am, Rm. A Lunine J. I. Print-Only Presentations LesourdM. New Meteorites Posters, Th pm, UHCL LuoW.* Martian Canyons ... , Wpm, Rm. C LeverJ. H. Cosmic Dust Posters, Th pm, UHCL Luttge A. Mars Surface ... II Posters, Th pm, UHCL LevineJ. S. Impact ... Geophy. Posters, Th pm, UHCL Lyon I. C. Martian Meteorites ... Posters, T pm, UHCL Levison H. F.* Origins of Planetary ... , M am, Rm. D MaP. Cosmic Dust, Th pm, Rm. D Lewis J. S. Small Bodies ... , W pm, Rm. B MaP. Impact ... Geology Posters Th pm, UHCL Lewis R. S. Presolar Grains, W pm, Rm. A MaP. Iron Meteorites Posters, Th pm, UHCL Lewis R. S. Meteorites: Isotopic ... Posters, Th pm, UHCL MaP. Meteorites: Composition ... , F am, Rm. B Leya I. Origins of Planet. ... Posters, T pm, UHCL Macinnis C. Mars Volcanism Posters, Tpm, UHCL Leyal. Iron Meteorites Posters, Th pm, UHCL Mackey F. Impact ... Mars Posters, T pm, UHCL Leya I. Print-Only Presentations MacPherson G. J.* Refractory Inclusions, T pm, Rm. A LiH. A Year NEAR Eros, T pm, Rm. C MacPherson G. J. Refractory Inclusions Posters, T pm, UHCL Li L.* Moon: Remote Sensing ... , Th pm, Rm. B MacPherson G. J. Carbonaceous Chondrites, W am, Rm. A Liberman R. G. Meteorites: Composition ... , F am, Rm. B MadeyT. E. Planetary Formation ... Posters, Th pm, UHCL Libourel G. Cosmic Dust, Th pm, Rm. D Maeda T. Impact Cratering, T pm, Rm. D Lin 1-C. Mars Surface ... II Posters, Th pm, UHCL MaenoN. Planetary Formation ... Posters, Th pm, UHCL Lin R. P. Lunar Impacts, T am, Rm. D MaetzM. Cosmic Dust Posters, Th pm, UHCL B. D. Origins of Planet .... Posters, T pm, UHCL Makupula S. Lunar Surfaces ... Posters, T pm, UHCL Lindstrom D. 1.* The Tagish Lake ... , M am, Rm. A Malamud B. D. Mars Geophysics, T am, Rm. C Lindstrom M. M. Education Posters, T pm, UHCL Malhotra R. * Origins of Planetary ... , M am, Rm. D Lindstrom M. M. Small Bodies ... , Wpm, Rm. B MalinM.C. Mars Polar Posters, T pm, UHCL Link L. S. Mars Mapping Posters, T pm, UHCL MalinM.C. Print-Only Presentations Lipschutz M. E. Ordinary & Enstatite ... Posters, Th pm, UHCL Manu. Lunar Surfaces ... Posters, T pm, UHCL LittleR. Remote Views ... Posters, Th pm, UHCL MalumK.M. Lunar Mare ... Posters, T pm, UHCL LittleR. C. Moon: New Views ... , Th am, Rm. B Malyshev A. I. Print-Only Presentations LiuM.* Meteorites: Composition ... , F am, Rm. B Malysheva L. K. Print-Only Presentations LiuS* Impact Ejecta, Tam, Rm. B MandeaM. Mars Magnets, T pm, Rm. B Liu S. Impact ... Geology Posters Th pm, UHCL MangoldN. Frozen Mars: Polar ... , M pm, Rm. C LockyerN. P. Martian Meteorites ... Posters, T pm, UHCL MangoldN. Mars: Wrinkled ... Posters, T pm, UHCL Lofgren G. E* Chondrules, M pm, Rm. A MannJ. Cosmic Dust Posters, Th pm, UHCL Lofgren G. E. Martian Meteorites ... Posters, T pm, UHCL ManuelO. Origins of Planet. ... Posters, T pm, UHCL Lofgren G. E. Chondrules Posters, T pm, UHCL Mao H. K. Shock Processes ... Posters, Th pm, UHCL Lofgren G. E. Martian Soil Chemistry ... , Th pm, Rm. C MarchisF. Print-Only Presentations LongazoT. Astrobiology II Posters, Th pm, UHCL MarcinoD. Mars Surface ... I Posters, Th pm, UHCL Longazo T. G. Martian Meteorites ... Posters, T pm, UHCL MargotJ.L. Venus: Texture ... , M pm, Rm. B Longazo T. G. Mars Surface ... I Posters, Th pm, UHCL Margot J. L.* Small Bodies ... , W pm, Rm. B Longazo T. G. Astrobiology II Posters, Th pm, UHCL Marhas K. K. Refractory Inclusions Posters, T pm, UHCL Longhi J.* Moon: New Views ... , M am, Rm. B Marinangeli L. Mars Volcanism: ... , M am, Rm. C Longhi J. Mars Surface ... I Posters, Th pm, UHCL Marinangeli L. Mars Missions Posters, Th pm, UHCL Longhi J. Print-Only Presentations Marinangeli L. Planetary Formation ... Posters, Th pm, UHCL LooperJ. K. Small Body ... Posters, Th pm, UHCL Marini A. Remote Views ... Posters, Th pm, UHCL Lopes R. M. C.* lo: Inside and Out, W am, Rm. B Marinova M. M. Frozen Mars: Polar ... , M pm, Rm. C Lopes-Gautier R. Io: Inside and Out, W am, Rm. B Marion G. Print-Only Presentations Lopes-Gautier R. Fire and Ice ... Posters, Th pm, UHCL Markiewicz W. J. Mars Missions Posters, Th pm, UHCL Lopez I. Venus Geology ... Posters, T pm, UHCL MarovM. Ya. Print-Only Presentations

32nd LPSC Program lndex ______~------169 Marshall J.* Origins of Planetary ... , M am, Rm. D McEwen A. S. Io: Inside and Out, W am, Rm. B Marshall J. Mars Surface ... II Posters, Th pm, UHCL McEwen A. S. Mars Missions Posters, Th pm, UHCL Martens R. L. Missions, ... Posters, Th pm, UHCL McEwen A. S. Fire and Ice ... Posters, Th pm, UHCL Marti K. New Meteorites Posters, Th pm, UHCL McEwenA.S. Remote Views ... Posters, Th pm, UHCL Marti K. Martian Meteorites, F am, Rm. C McFadden L. A Year NEAR Eros Posters, T pm, UHCL Marti K. Print-Only Presentations McFadden L. K. A Year NEAR Eros, T pm, Rm. C Martin P.* Planetary Formation ... , Th am, Rm. D McFarland E. R. Impact ... Geology Posters Th pm, UHCL Martin P. D. Mars Missions Posters, Th pm, UHCL McFarland E. R. Impact ... Geophy. Posters Th pm, UHCL Marty B. Lunar Surfaces ... Posters, T pm, UHCL McGovern P. J* Mars Geophysics, T am, Rm. C Maruoka T. Impact ... Geology Posters Th pm, UHCL McHargue L. R. Lunar Surfaces ... Posters, T pm, UHCL Marzari F. Small Body ... Posters, Th pm, UHCL McHone J. F. Impact ... Geology Posters Th pm, UHCL Marzari F. Print-Only Presentations McKay C. P. Frozen Mars: Polar ... , M pm, Rm. C Masaitis V. L. Impact ... Geology Posters Th pm, UHCL McKay C. P. Mars Surface ... I Posters, Th pm, UHCL Masarik J. Mars Atrnos .... Posters, Th pm, UHCL McKay D. S. Martian Meteorites ... Posters, T pm, UHCL Masarik J. Meteorites: Composition ... , F am, Rm. B McKay D. S. Astrobiology I, Th am, Rm. A Mason D. Mars Channels, ... Posters, T pm, UHCL McKay D. S. Moon: New Views ... , Th am, Rm. B Mason T. F. D. Meteorites: Isotopic ... Posters, Th pm, UHCL McKay D. S. Mars Surface ... I Posters, Th pm, UHCL MasterS. Impact Geology Posters Th pm, UHCL McKay D. S. Mars Atrnos .... Posters, Th pm, UHCL Mastrapa R. M. E. Origins of Planet .... Posters, T pm, UHCL McKay D. S. Astrobiology II Posters, Th pm, UHCL Mathew K. J. * Martian Meteorites, F am, Rm. C McKay D. S. Print-Only Presentations Mathies R. Astrobiology II Posters, Th pm, UHCL McKay G. Angrites, Eucrites, ... , W pm, Rm. D Matrajt G.* Astrobiology I, Th am, Rrn. A McKay G. Martian Meteorites, F am, Rm. C Matrajt G.* Cosmic Dust, Th pm, Rm. D McKay G. A. Martian Meteorites ... Posters, T pm, UHCL Matrajt G. Cosmic Dust Posters, Th pm, UHCL McKeegan K. D* Refractory Inclusions, T pm, Rm. A MatrajtG. Print-Only Presentations McKeegan K. D. Refractory Inclusions Posters, T pm, UHCL Matson D. L.* Io: Inside and Out, W am, Rm. B McKeever S. W. S. Mars Surface ... I Posters, Th pm, UHCL Matson D. M. Outer Body Experiences, M pm, Rm. D McKinnon W. B. Outer Body ... Posters, T pm, UHCL MatsudaJ. Impact ... Geology Posters Th pm, UHCL McKinnon W. B. Modeling Impact ... Posters, T pm, UHCL Matsuda T. Missions, ... Posters, Th pm, UHCL McKinnon W. B.* Europa Surface-Subsurface... , Th pm, Rm. A Matsui T. Mars Channels, ... Posters, T pm, UHCL McKinnon W. B. Europa Surface ... Posters, Th pm, UHCL Matsui T. Environmental ... Posters, T pm, UHCL McKinnon W. B. Print-Only Presentations Matsui T. Planetary Formation ... , Th am, Rm. D McLennan S.M.* Mars Geophysics, T am, Rm. C Matsunaga T. Remote Views ... Posters, Th pm, UHCL McNutt R. L. Jr. A Year NEAR Eros, T pm, Rm. C Matthews J. M. Small Body ... Posters, Th pm, UHCL McSween H. Y. Jr. Martian Meteorites ... Posters, T pm, UHCL MauretteM. Astrobiology I, Th am, Rm. A McSween H. Y. Jr. Chondrules Posters, T pm, UHCL MauretteM. Cosmic Dust, Th pm, Rm. D McSween H. Y. Jr. Small Bodies ... , Wpm, Rm. B Maurette M. Cosmic Dust Posters, Th pm, UHCL McSween H. Y. Jr. Martian Soil Chemistry ... , Th pm, Rm. C Maurette M. Print-Only Presentations McSween H. Y. Jr. Mars Surface ... II Posters, Th pm, UHCL Maurice S. Moon: New Views ... , M am, Rm. B McSween H. Y. Jr. Martian Meteorites, F am, Rm. C Maurice S. Lunar Mare ... Posters, T pm, UHCL MeibomA. Chondrites: Nebular ... , Tam, Rm. A Maurice S.* Moon: New Views ... , Th am, Rm. B MeibomA. Refractory Inclusions, T pm, Rm. A Maurice S. Remote Views ... Posters, Th pm, UHCL MeibomA. Refractory Inclusions Posters, T pm, UHCL Maxwell T. A.* Mars Surface Drainage ... , W am, Rm. C Meisel T. Planetary Formation ... , Th am, Rm. D Mayeda T. Meteorites: Composition ... , F am, Rm. B Melchior R. Mars Channels, ... Posters, T pm, UHCL Mayeda T. K. The Tagish Lake ... , M am, Rm. A Melchior R. Cosmic Dust Posters, Th pm, UHCL Mayeda T. K. Lunar Surfaces ... Posters, T pm, UHCL Melim L.A. Astrobiology III, F am, Rm. A Mayeda T. K. New Meteorites Posters, Th pm, UHCL Mellon M. T.* Mars Surface Drainage ... , W am, Rm. C Mayeda T. K. Print-Only Presentations Mellon M. T. Martian Soil Chemistry ... , Th pm, Rm. C Mazie!. Mars Volcanism Posters, Tpm, UHCL Mellon M. T. Mars: Looking Down ... , F am, Rm. D McAfeeJ. M. Martian Soil Chemistry ... , Th pm, Rm. C MeloshH. J. Impact Ejecta, Tam, Rm. B McBrideN. Impact ... Mars Posters, T pm, UHCL MeloshH. J. Modeling Impact ... Posters, T pm, UHCL McCallum I. S. Lunar Jambalaya ... Posters, T pm, UHCL Melosh H. J* Astrobiology I, Th am, Rm. A McCallum I. S. Moon: New Views ... , Th am, Rm. B MeloshH. J. Europa Surface ... Posters, Th pm, UHCL McCallum I. S. Print-Only Presentations Mendelson C. V. Mars: Wrinkled ... Posters, T pm, UHCL McCammon C. Lunar Jambalaya ... Posters, T pm, UHCL Mendelson C. V. Mars Channels, ... Posters, T pm, UHCL McCanta M. C. Martian Meteorites ... Posters, T pm, UHCL Mendelson C. V. Mars Volcanism Posters, T pm, UHCL McCarthy G. J. Cosmic Dust, Th pm, Rm. D Mendelson C. V. Mars Mapping Posters, T pm, UHCL McCartney E. A Year NEAR Eros, T pm, Rm. C Mendelson C. V. Martian Canyons ... , Wpm, Rm. C McClanahan T. P. A Year NEAR Eros, T pm, Rm. C Mendez A.* Astrobiology L Th am, Rm. A McCleese D. J. Mars: Looking Down ... , F am, Rm. D Mennella V. Outer Body Experiences, M pm, Rm. D McColley S. Planetary Formation ... Posters, Th pm, UHCL Menzies O. N. Ordinary & Enstatite ... Posters, Th pm, UHCL McCollom T. M. * Carbonaceous Chondrites, W am, Rm. A Merchel S. Presolar Grains, W pm, Rm. A McCordT. B* Outer Body Experiences, M pm, Rm. D Mercier D. Frozen Mars: Polar ... , M pm, Rm. C McCordT. B* Europa Surface-Subsurface... , Th pm, Rm. A Mercier E. Europa Surface ... Posters, Th pm, UHCL McCoyT. J. A Year NEAR Eros, T pm, Rm. C Merline W. J. Europa Surface ... Posters, Th pm, UHCL McCoyT. J. A Year NEAR Eros Posters, T pm, UHCL Merrifield M. R. A Year NEAR Eros, T pm, Rm. C McCoyT. J.* Angrites, Eucrites, ... , W pm, Rm. D Mertzman S. A. Mars Surface ... I Posters, Th pm, UHCL McDonough W. F* Planetary Formation ... , Th am, Rm. D Meshik A. P.* Presolar Grains, W pm, Rm. A McEwen A. S. Mars Volcanism: ... , M am, Rm. C MessengerS.* The Tagish Lake ... , M am, Rm. A McEwen A. S. Mars Mapping Posters, T pm, UHCL Mest S.C.* Mars Surface Drainage ... , W am, Rm. C

170 32nd LPSC Program Index Mest S.C. Martian Canyons ... , W pm, Rm. C Moister F. J.* Cosmic Dust, Th pm, Rm. D Metrich N. Angrites, Eucrites ... Posters, T pm, UHCL Monnereau M. Fire and Ice ... Posters, Th pm, UHCL Metzger R. M. Mars Missions Posters, Th pm, UHCL Montesi L. G. J.* Mars Magnets, T pm, Rm. B MetzgerS. Print-Only Presentations MoonN. Angrites, Eucrites ... Posters, T pm, UHCL Metzger S. M. Mars Polar Posters, T pm, UHCL Moorbath S. * Astrobiology III, F am, Rm. A Metzger S.M. Mars Atrnos .... Posters, Th pm, UHCL MooreJ. M.* Frozen Mars: Polar ... , M pm, Rm. C Mevel L. Outer Body Experiences, M pm, Rm. D MooreJ. M. Outer Body ... Posters, T pm, UHCL Mevel L. Europa Surface ... Posters, Th pm, UHCL MooreJ. M. Martian Soil Chemistry ... , Th pm, Rm. C Meyer B. R. Mars Volcanism Posters, T pm, UHCL MooreJ. M. Mars Surface ... II Posters, Th pm, UHCL Meyer B.S. Presolar Grains, Wpm, Rm. A Moore K. R. Moon: New Views ... , M am, Rm. B Meyer B.S. Print-Only Presentations Moore K. R. Moon: New Views ... , Th am, Rm. B MeyerM. A.* Europa Surface-Subsurface... , Th pm, Rm. A Moore K. R. Remote Views ... Posters, Th pm, UHCL Meyer M.A. Astrobiology II Posters, Th pm, UHCL Morbidelli A. Print-Only Presentations MeyerM. A. Print-Only Presentations Moreau J. W.* Astrobiology III, F am, Rm. A Meyyappan M. Mars Surface ... II Posters, Th pm, UHCL Moreels P.* Venus: Texture ... , M pm, Rm. B Michael G. G. Print-Only Presentations Morgan J. V. Impact ... Geophy. Posters, Th pm, UHCL Michalski J. Fire and Ice ... Posters, Th pm, UHCL Morgan J. W.* Planetary Formation ... , Th am, Rm. D MichelR. Presolar Grains, W pm, Rm. A MoriokaM. Refractory Inclusions, T pm, Rm. A MichelR. Print-Only Presentations MorleyJ.G. Mars Data ... Posters, T pm, UHCL Mickelson B. Print-Only Presentations MorleyJ.G. Mars Missions Posters, Th pm, UHCL Migd.isova L. F. Print-Only Presentations MoriokA.* Carbonaceous Chondrites, W am, Rm. A Mikheeva I. A Year NEAR Eros, T pm, Rm. C Morozhenko A. V. Print-Only Presentations MiklosM. Impact ... Geology Posters Th pm, UHCL Morris P. A. Astrobiology II Posters, Th pm, UHCL Mikouchi T. The Tagish Lake ... , M am, Rm. A Morris R. Mars Surface ... II Posters, Th pm, UHCL Mikouchi T. Martian Meteorites ... Posters, T pm, UHCL Morris R. V. Martian Meteorites ... Posters, T pm, UHCL Mikouchi T. Tagish Lake ... Posters, T pm, UHCL Morris R. V. * Martian Soil Chemistry ... , Th pm, Rm. C Mikouchi T. Asteroid-Meteorite ... Posters, T pm, UHCL Morris R. V. Mars Surface ... I Posters, Th pm, UHCL Mikouchi T. Angrites, Eucrites ... Posters, T pm, UHCL Morris R. V. Mars Surface ... II Posters, Th pm, UHCL Mikouchi T.* Angrites, Eucrites, ... , W pm, Rm. D Morris R. V. Print-Only Presentations Mikouchi T. * Martian Meteorites, F am, Rm. C Morrison A. D. Mars Missions Posters, Th pm, UHCL Mikouchi T. Print-Only Presentations MorrowJ. R. Impact ... Geology Posters Th pm, UHCL MilamK. A. Mars Surface ... II Posters, Th pm, UHCL Mortillaro C. Education Posters, T pm, UHCL MilazzoM. Fire and Ice ... Posters, Th pm, UHCL Mosegaard K. Lunar Jambalaya ... Posters, T pm, UHCL Milazzo M. P. * Io: Inside and Out, W am, Rm. B MosesJ. I. Outer Body ... Posters, T pm, UHCL Milazzo M. P. Fire and Ice ... Posters, Th pm, UHCL Mosqueira I.* Outer Body Experiences, M pm, Rm. D Milkovich S. M. Mars Polar Posters, T pm, UHCL Moss B. E. Print-Only Presentations Miller M. K. Missions, ... Posters, Th pm, UHCL Moss C. E. Missions, ... Posters, Th pm, UHCL Milliken K. L. * Astrobiology III, F am, Rm. A Mostefaoui S.* Presolar Grains, W pm, Rm. A Milne A. A Year NEAR Eros, T pm, Rm. C Mouginis-Mark P. J.* Mars Volcanism: ... , M am, Rm. C MingD. W. Martian Meteorites ... Posters, T pm, UHCL Mouginis-Mark P. J. Mars Volcanism Posters, T pm, UHCL MingD. W. Mars Surface ... I Posters, Th pm, UHCL Mousis O. Outer Body Experiences, M pm, Rm. D MingD.W. Mars Surface ... II Posters, Th pm, UHCL MSJJNIS Team A Year NEAR Eros, T pm, Rm. C Minitti M. Planetary Formation ... Posters, Th pm, UHCL Mueller K. J. Mars Magnets, T pm, Rm. B Minitti M. E.* Martian Soil Chemistry ... , Th pm, Rm. C MuellerT. Mars Missions Posters, Th pm, UHCL Minitti M. E. Shock Processes ... Posters, Th pm, UHCL MuenowD. W. Mars Surface ... I Posters, Th pm, UHCL Misawa K.* Angrites, Eucrites, ... , Wpm, Rm. D Muhleman D. O. Mars: Looking Down ... , F am, Rm. D Mitchell D. L. Lunar Impacts, T am, Rm. D MukaiM. Angrites, Eucrites ... Posters, T pm, UHCL Mitchell K. L* Mars Volcall.ism: ... , M am, Rm. C Mullane E. Meteorites: Isotopic ... Posters, Th pm, UHCL Mitchell K. L. Mars Data ... Posters, T pm, UHCL Muller J-P. Mars Missions Posters, Th pm, UHCL Mitchell K. L. Mars Missions Posters, Th pm, UHCL Muller J.-P. Mars Data ... Posters, T pm, UHCL Mitchell K. L. Print-Only Presentations Murad E. Mars Surface ... I Posters, Th pm, UHCL Mittlefehldt D. W. Martian Meteorites ... Posters, T pm, UHCL Murchie S.* A Year NEAR Eros, T pm, Rm. C Mittlefehldt D. W.* Angrites, Eucrites, ... , W pm, Rm. D MurchieS. A Year NEAR Eros Posters, T pm, UHCL Miura Y.* Impact Cratering, T pm, Rm. D Murchie S. Mars Surface ... II Posters, Th pm, UHCL Miura Y. Impact ... Geology Posters Th pm, UHCL Murchie S. L. A Year NEAR Eros, T pm, Rm. C Miura Y. Iron Meteorites Posters, Th pm, UHCL Murchie S. L. Mars Surface ... I Posters, Th pm, UHCL MiyamotoM. Martian Meteorites ... Posters, T pm, UHCL MurphyM.E. A Year NEAR Eros, T pm, Rm. C MiyamotoM. Asteroid-Meteorite ... Posters, T pm, UHCL MurphyM.E. A Year NEAR Eros Posters, T pm, UHCL MiyamotoM. Angrites, Eucrites ... Posters, T pm, UHCL Murray S. S. Education Posters, T pm, UHCL MiyamotoM. Print-Only Presentations Murty S. V. S.* Meteorites: Composition ... , F am, Rm. B Miyata Y. Angrites, Eucrites ... Posters, T pm, UHCL Musselwhite D. S.* Mars Surface Drainage ... , W am, Rm. C MizutaniH. Remote Views ... Posters, Th pm, UHCL Mustard J. F. Impact Cratering, T pm, Rm. D Mizutani H. Print-Only Presentations Mustard J. F. Mars: Small Scale ... Posters, T pm, UHCL MizutaniM. Remote Views ... Posters, Th pm, UHCL Mustard J. F.* Mars: Subsurface Ice ... , Th am, Rm. C Mjolsness E. Mars Missions Posters, Th pm, UHCL Mustard J. F. Moon: Remote Sensing ... , Th pm, Rm. B Mohapatra R. Presolar Grains, W pm, Rm. A Mustard J. F. Martian Soil Chemistry ... , Th pm, Rm. C Mojzsis S. J. Astrobiology I, Th am, Rm. A Mustard J. F. Mars Surface ... I Posters, Th pm, UHCL MOLA Sci. Team Mars Geophysics, Tam, Rm. C Mustard J. F. Print-Only Presentations Moller L. E. Mars Missions Posters, Th pm, UHCL Nagahara H.* Chondrules, M pm, Rm. A Moller S.C. Mars Channels, ... Posters, T pm, UHCL Nagahara H.* Chondrites: Nebular ... , Tam, Rm. A

32nd LPSC Program Index ______l11 Nagao K. Carbonaceous Chondrites, W am, Rm. A Nishiizumi K. New Meteorites Posters, Th pro, UHCL Nagao K. New Meteorites Posters, Tb pm, UHCL Nishiizumi K. * Meteorites: Composition ... , F am, Rm. B Nagasawa H. Refractory Inclusions, T pm, Rm. A Nittler L. R. A Year NEAR Eros, T pm, Rm. C Nagashima K. Refractory Inclusions, T pm, Rm. A Nittler L. R. A Year NEAR Eros Posters, T pm, UHCL Nagashima K. Chondrules Posters, T pm, UHCL Nittler L. R* Presolar Grains, W pm, Rm. A NakaiM. Angrites, Eucrites ... Posters, T pm, UHCL Nixon B. Outer Body Experiences, M pm, Rm. D Nakamura K. Cosmic Dust Posters, Tb pm, UHCL Nixon B. Outer Body ... Posters, T pm, UHCL Nakamura K. Small Body ... Posters, Tb pm, UHCL NobleS. K. Mars Surface ... II Posters, Th pm, UHCL Nakamura K. Print-Only Presentations Noe Dobrea E. Z. * Frozen Mars: Polar ... , M pm, Rm. C NakamuraM. Remote Views ... Posters, Tb pm, UHCL Noguchi T. The Tagish Lake ... , M am, Rm. A Nakamura T. * The Tagish Lake ... , M am, Rm. A Noguchi T. Carbonaceous Chondrites, W am, Rm. A Nakamura T. Carbonaceous Chondrites, W am, Rm. A Noguchi T.* Cosmic Dust, Th pm, Rm. D Nakamura T. Cosmic Dust, Tb pm, Rm. D NoguesJ. P. Small Body ... Posters, Tb pm, UHCL Nakamura T. Mars Atmos .... Posters, Th pm, UHCL Nolan M. C.* Small Bodies ... ,Wpm, Rm. B Nakamura T. New Meteorites Posters, Tb pm, UHCL Nolin A. W.* Frozen Mars: Polar ... , M pm, Rm. C Nakano H. Planetary Formation ... Posters, Tb pm, UHCL NomuraT. Venus Geology ... Posters, Tpm, UHCL Nakano Y. Environmental ... Posters, T pm, UHCL Nordholt J. E. Mars Missions Posters, Tb pm, UHCL Namiki N. Lunar Jambalaya ... Posters, T pm, UHCL Nordholt J. E. Missions, ... Posters, Th pm, UHCL Naoi T. Cosmic Dust Posters, Tb pro, UHCL Norman L. M. Print-Only Presentations NaraokaH. New Meteorites Posters, Tb pro, UHCL Norman M.D.* Lunar Impacts, T am, Rm. D Nazarov M. Lunar hnpacts, T am, Rm. D Northup D. E. Astrobiology III, F am, Rm. A Nazarov M. Lunar Surfaces ... Posters, T pm, UHCL Nowicki S. A.* Mars: Looking Down ... , F am, Rm. D NazarovM. A Refractory Inclusions Posters, T pm, UHCL Ntaflos Tb. Print-Only Presentations Nazarov M. A. Lunar Surfaces ... Posters, T pro, UHCL Numaguchi A. Mars: Subsurface Ice ... , Tb am, Rm. C Nazarov M. A. Martian Meteorites ... Posters, T pro, UHCL Nunes D. C. Venus Geology ... Posters, T pm, UHCL Nazarov M. A. Angrites, Eucrites, ... , W pro, Rm. D Nunes D. C. Martian Canyons ... , W pm, Rm. C Nazarov M. A. Carbonaceous ... Posters, Tb pm, UHCL NuthJ. A. Cosmic Dust, Tb pro, Rm. D Nazarov M. A. New Meteorites Posters, Tb pm, UHCL Nuth J. A. III* Astrobiology I, Th am, Rm. A Nazarov M. A. Astrobiology III, F am, Rm. A Nuth J. A. III Cosmic Dust Posters, Tb pm, UHCL Nazarov M. A. Martian Meteorites, F am, Rm. C Nyquist L. Lunar Mare ... Posters, T pm, UHCL Nazarov M. A. Print-Only Presentations Nyquist L. E. Moon: New Views ... , M am, Rm. B Nazzario R. Outer Body ... Posters, T pm, UHCL Nyquist L. E. Mars Atmos .... Posters, Tb pm, UHCL NchoduM. R. Lunar Surfaces ... Posters, T pm, UHCL Nyquist L. E.* Martian Meteorites, F am, Rm. C Neakrase L. D. V.* Mars: Looking Down ... , F am, Rm. D O'Brien D.P. Europa Surface-Subsurface... , Tb pm, Rm. A Neal C. R.* Moon: New Views ... , M am, Rm. B O'Brien D.P. Europa Surface ... Posters, Th pm, UHCL Neal C. R. Lunar Jambalaya ... Posters, T pm, UHCL OckerK. D. Martian Meteorites ... Posters, T pm, UHCL Neal C. R. Martian Meteorites ... Posters, T pro, UHCL OeK.* Martian Meteorites, F am, Rm. C Neal C. R* Martian Meteorites, F am, Rm. C Ohsumi K. Angrites, Eucrites ... Posters, T pm, UHCL Nealson K. H. Astrobiology I, Tb am, Rm. A OhtakeM. Remote Views ... Posters, Th pro, UHCL Neese C. Small Body ... Posters, Th pro, UHCL Ohtani E. Planetary Formation ... Posters, Tb pm, UHCL Nelson D. M. Mars Channels, ... Posters, T pm, UHCL Oji T. Environmental ... Posters, T pm, UHCL Nelson R. Outer Body Experiences, M pro, Rm. D Okada A. New Meteorites Posters, Tb pm, UHCL Nelson R. M* Moon: Remote Sensing ... , Th pro, Rm. B Okada T. Missions, ... Posters, Th pm, UHCL Nemtchinov I. V. Meteoroids Posters, Th pro, UHCL Okazaki R. Carbonaceous Chondrites, W am, Rm. A Nettles J. W. Chondrules Posters, T pro, UHCL O'Keefe J. D* Impact Ejecta, Tam, Rm. B NeukumG. Moon: New Views ... , M am, Rm. B O'Keefe J. D. Impact Cratering, T pm, Rm. D NeukumG. Outer Body ... Posters, T pm, UHCL O'Keefe J.D.* Small Bodies ... , Wpm, Rm. B NeukumG. Lunar Mare ... Posters, T pm, UHCL Okubo C. H.* Mars Magnets, T pm, Rm. B NeukumG. Impact ... Mars Posters, T pm, UHCL Okubo C. H. Print-Only Presentations NeukumG. Mars Missions Posters, Th pro, UHCL Olendzenski L. Education Posters, T pm, UHCL NeukumG. Fire and Ice ... Posters, Tb pm, UHCL Oliver F. W. Carbonaceous ... Posters, Th pm, UHCL NeukumG. Print-Only Presentations Olson E. K. Martian Meteorites ... Posters, T pm, UHCL Neumann G. A Year NEAR Eros, T pm, Rm. C Omelchenko V. V. Moon: Remote Sensing ... , Th pm, Rm. B Neumann G. A. Mars Geophysics, T am, Rm. C OquestC. Mars Missions Posters, Th pm, UHCL Neumann G. A. A Year NEAR Eros, T pm, Rm. C Ori G. G.* Mars Volcanism: ... , M am, Rm. C Neumann S. Print-Only Presentations Ori G. G. Martian Canyons ... , Wpm, Rm. C Newsom H. E. Environmental ... Posters, T pro, UHCL Ori G. G. Mars Missions Posters, Th pm, UHCL Newsom H. E. Martian Meteorites ... Posters, T pm, UHCL OrlandoT. M. Europa Surface-Subsurface ... , Tb pm, Rm. A Newsom H. E. Education Posters, T pro, UHCL OrmoJ. Mars Volcanism: ... , M am, Rm. C Newsom H. E.* Mars: Subsurface Ice ... , Tb am, Rm. C OrmoJ. Mars: Small Scale ... Posters, T pm, UHCL Newville M. Missions, ... Posters, Tb pm, UHCL OrmoJ. Mars Missions Posters, Tb pm, UHCL NgoH.H. Impact Ejecta, Tam, Rm. B Orofino V. Mars Channels, ... Posters, T pm, UHCL Nicholson P. Outer Body Experiences, M pm, Rm. D Orofino V. Mars Surface ... I Posters, Th pro, UHCL Niebur C. S. Mars Missions Posters, Tb pro, UHCL Ortiz-Aleman C. Impact ... Geophy. Posters, Th pm, UHCL Nijman W* Planetary Formation I, W am, Rm. D Osada Y. Chondrules, M pm, Rm. A Nimmo F.* Mars Geophysics, T am, Rm. C Osaka T. Angrites, Eucrites ... Posters, T pm, UHCL Nimmo F. Mars: Small Scale ... Posters, T pm, UHCL Osawa T* Carbonaceous Chondrites, W am, Rm. A NlMSTeam Io: Inside and Out, W am, Rm. B Osborne P. Impact ... Mars Posters, T pm, UHCL Nishiizumi K. * Lunar hnpacts, T am, Rm. D Osinski G. R.* Impact Ejecta, Tam, Rm. B Nishiizumi K. Small Bodies ... ,Wpm, Rm. B Ostro S. J. Small Bodies ... , Wpm, Rm. B

172 32nd LPSC Program Index OtakeH. Remote Views ... Posters, Th pm, UHCL Pettengill G. H. Print-Only Presentations Otsuki M. Meteorites: Composition ... , F am, Rm. B PeulvastJ. P. Frozen Mars: Polar ... , M pm, Rm. C Ott U.* Presolar Grains, W pm, Rm. A Peulvast J.P. Mars: Wrinkled ... Posters, T pm, UHCL OuraY. New Meteorites Posters, Th pm, UHCL Phillips C. B.* Europa Surface-Subsurface... , Th pm, Rrn. A OzawaK. Chondrules, M pm, Rm. A Phillips R. J. Mars Geophysics, T am, Rm. C OzawaK. Chondrites: Nebular ... ,Tam, Rm. A Phillips R. J. Mars Mapping Posters, T pm, UHCL OzimaM. Print-Only Presentations Phillips R. J. Venus Geology ... Posters, T pm, UHCL Paarlberg R. L. Mars Surface ... II Posters, Th pm, UHCL Phillips R. J. Mercury ... Posters, T pm, UHCL Pahisti E. Moon: New Views ... , Th am, Rm. B Phillips R. J. Mars Surface Drainage ... , W am, Rm. C Palerrni ti M. Print-Only Presentations Phillips R. 1.* Martian Canyons ... , W pm, Rm. C PalmaR. Cosmic Dust, Th pm, Rm. D Phillips R. J. Mars: Subsurface Ice ... , Th am, Rm. C PalmaR. L. Cosmic Dust, Th prn, Rm. D Phoreman J. Print-Only Presentations Palrne H. Print-Only Presentations Piatek J. A. Moon: Remote Sensing ... , Th pm, Rm. B Papanastassiou D. A. Impact Ejecta, T am, Rm. B Pierazzo E.* Impact Ejecta, T am, Rm. B Papanastassiou D. A. Lunar Impacts, T am, Rm. D Pierazzo E. Environmental ... Posters, T pm, UHCL Papanastassiou D. A.* Meteorites: Composition ... , F am, Rm. B Pierazzo E. Europa Surface ... Posters, Th pm, UHCL Papanastassiou D. P. Refractory Inclusions, T pm, Rrn. A Pierce T. L. Mars: Small Scale ... Posters, T prn, UHCL Papike J. J. Moon: New Views ... , M am, Rrn. B Pieters C. Print-Only Presentations PapikeJ. J. Lunar Mare ... Posters, T pm, UHCL Pieters C. M. Lunar Mare ... Posters, T pm, UHCL Papike J. J. Martian Meteorites ... Posters, T prn, UHCL Pieters C. M. Asteroid-Meteorite ... Posters, T pm, UHCL Papike J. J. Planetary Formation I, W am, Rrn. D Pieters C. M. Small Bodies ... , W prn, Rm. B PapikeJ. J. Astrobiology II Posters, Th pm, UHCL Pieters C. M.* Moon: Remote Sensing ... , Th prn, Rm. B PapikeJ.J. Astrobiology III, F am, Rrn. A Pieters C. M. Mars Surface ... II Posters, Th pm, UHCL PapikeJ. J. Martian Meteorites, F am, Rrn. C Pieters C. M. Remote Views ... Posters, Th pm, UHCL PapikeJ. J. Print-Only Presentations Pietsch J. Education Posters, T prn, UHCL Pappalardo R. Outer Body Experiences, M pm, Rm. D Pihlaja P. Print-Only Presentations Pappalardo R. Outer Body ... Posters, T pm, UHCL Pilkington M. Impact ... Geophy. Posters, Th prn, UHCL Pappalardo R. Print-Only Presentations Pillinger C. Mars Missions Posters, Th pm, UHCL Pappalardo R. T. Outer Body Experiences, M pm, Rm. D Pillinger C. T. The Tagish Lake ... , M am, Rrn. A Pappalardo R. T. Outer Body ... Posters, T pm, UHCL Pillinger C. T. Angrites, Eucrites ... Posters, T pm, UHCL Pappalardo R. T. * Europa Surface-Subsurface ... , Th pm, Rm. A Pillinger C. T. Presolar Grains, W pm, Rm. A Pappalardo R. T. Europa Surface ... Posters, Th pm, UHCL Pillinger C. T. Mars Missions Posters, Th pm, UHCL Pappalardo R. T. Print-Only Presentations Pillinger C. T. Print-Only Presentations Parker J. Wm. Print-Only Presentations Pincus S. Astrobiology II Posters, Th pm, UHCL Parker T. Mars Missions Posters, Th pm, UHCL Pinel P. C. Missions, ... Posters, Th prn, UHCL Parker T. J. * Mars Surface Drainage ... , W am, Rm. C Pinet P. C. Remote Views ... Posters, Th pm, UHCL Parker T. J. Martian Canyons ... , W prn, Rm. C Pinel P. C.* Mars: Looking Down ... , F am, Rm. D Parker T. J. Mars: Subsurface Ice ... , Th am, Rm. C Pizzarello S* The Tagish Lake ... , M am, Rrn. A Parmentier E. M.* Mars Geophysics, T am, Rm. C Plaut J. J. * Mars: Subsurface Ice ... , Th am, Rm. C Parmentier E. M. Print-Only Presentations Plaut J. J. Mars Missions Posters, Th pm, UHCL Parrish R. R. Meteorites: Isotopic ... Posters, Th pm, UHCL Plescia J. B. Print-Only Presentations Parsons J. D* Mars Surface Drainage ... , W am, Rm. C Poage. w. Impact Ejecta, Tam, Rm. B Passer A. L. Modeling Impact ... Posters, T pm, UHCL Poage. w. Impact Geology Posters Th pm, UHCL Pataki T. Print-Only Presentations Poage. w. Impact ... Geophy. Posters, Th prn, UHCL Patchen A. Print-Only Presentations Polimeno N. Mars Surface ... I Posters, Th pm, UHCL Pathare A. V. Mars: Subsurface Ice ... , Th am, Rm. C Polnau E. Lunar Impacts, T am, Rrn. D PatschM. Lunar Surfaces ... Posters, T pm, UHCL Polnau E.* Meteorites: Composition ... , F am, Rm. B Patsch M. New Meteorites Posters, Th pm, UHCL Ponganis K. V. New Meteorites Posters, Th pm, UHCL Patzer A.* Angrites, Eucrites, ... , W pm, Rm. D Pongracz R. Print-Only Presentations Pearson V. K* The Tagish Lake ... , M am, Rm. A Poole F. G. Impact ... Geology Posters Th pm, UHCL Pearson V. K. Tagish Lake ... Posters, T pm, UHCL Porcelli D. Planetary Formation I, W am, Rrn. D Peitersen M. N. Mars Volcanism Posters, T pm, UHCL Porco C. Fire and Ice ... Posters, Th pm, UHCL Pellin M. J. Presolar Grains, W pm, Rm. A Poreda R. J. Impact Ejecta, Tam, Rm. B Pellin M. J. Meteorites: Isotopic ... Posters, Th pm, UHCL Portle K. B. Martian Canyons ... , Wpm, Rm. C Pepin R. Cosmic Dust, Th pm, Rm. D Poulter K. E. Mars Channels, ... Posters, T pm, UHCL Pepin R. O. * Cosmic Dust, Th pm, Rm. D Povenmire H. Print-Only Presentations Perron C. Ordinary & Enstatite ... Posters, Th pm, UHCL Povenrnire K. Print-Only Presentations Pesonen L. J. Print-Only Presentations Powars D. S. Impact ... Geology Posters Th pm, UHCL Petaev M. A Year NEAR Eros, T pm, Rm. C Powars D. S. Impact ... Geophy. Posters, Th pm, UHCL Petaev M. I. Chondrites: Nebular ... , T am, Rm. A PrangeR. Print-Only Presentations Petaev M. I. Refractory Inclusions Posters, T pm, UHCL Pratts. Mars Volcanism: ... , M am, Rm. C Petaev M.l. Carbonaceous ... Posters, Th pm, UHCL Pratts. Mars Magnets, T pm, Rm. B Petaev M.l. New Meteorites Posters, Th pm, UHCL PrattS. Mars Polar Posters, T pm, UHCL Petaev M.l. Print-Only Presentations PrattS. Mars Volcanism Posters, T pm, UHCL Peterson C. A.* Moon: New Views ... , M am, Rrn. B PrattS. Print-Only Presentations Peterson K. Venus Geology ... Posters, T pm, UHCL Pravdivtseva O. V.* Carbonaceous Chondrites, W am, Rm. A Petit E. New Meteorites Posters, Th pm, UHCL Pravdivtseva O. V. Presolar Grains, W pm, Rrn. A PetroN. Moon: Remote Sensing ... , Th pm, Rm. B Presley M. A. Mars Surface ... II Posters, Th pm, UHCL PetroN. E. Lunar Mare ... Posters, T pm, UHCL Prettyman T. H.* Moon: New Views ... , Th am, Rm. B Petrova T. L. Print-Only Presentations Prettyman T. H. Missions, ... Posters, Th pm, UHCL

32nd LPSC Program Index ______l73 Prettyman T. H. Remote Views ... Posters, Th pm, UHCL Rifkin M. K. Mars: Small Scale ... Posters, T pm, UHCL Price G. D. Impact Cratering, T pm, Rm. D Rifkin M. K. Print-Only Presentations Price G. D. Planetary Formation ... , Th am, Rm. D Righter K.* Planetary Formation ... , Th am, Rm. D Prieto 0. Fire and Ice ... Posters, Th pm, UHCL Righter K. New Meteorites Posters, Th pm, UHCL Prieto 0. Europa Surface ... Posters, Th pm, UHCL Righter K. Planetary Formation ... Posters, Th pm, UHCL Prieur D. M.* Astrobiology III, F am, Rm. A Ringrose T. J. Mars Missions Posters, Th pm, UHCL Prilutskyi 0. Print -Only Presentations Rivkin A. S. Education Posters, T pm, UHCL Prinos J. Lunar Mare ... Posters, T pm, UHCL Rivkin A. S.* Small Bodies ... , W pm, Rm. B Priscu J. Astrobiology II Posters, Th pm, UHCL Rivkin A. S. Small Body ... Posters, Th pm, UHCL Pritchard M. E. Venus Geology ... Posters, T pm, UHCL RoarkJ. Mars Channels, ... Posters, T pm, UHCL Probst L. New Meteorites Posters, Th pm, UHCL Roark J. H. Mars Magnets, T pm, Rm. B Prockter L. A Year NEAR Eros, T pm, Rm. C Roark J. H. Education Posters, T pm, UHCL Prockter L. M. * A Year NEAR Eros, T pm, Rm. C Robert F. Refractory Inclusions, T pm, Rm. A Prockter L. M* Europa Surface-Subsurface ... , Th pm, Rm. A Robert F. Refractory Inclusions Posters, T pm, UHCL Prockter L. M. Europa Surface ... Posters, Th pm, UHCL Robert F. Print-Only Presentations Protheroe W. J. Jr. Tagish Lake ... Posters, T pm, UHCL Robertson S. Lunar Surfaces ... Posters, T pm, UHCL Protheroe W. J. Jr. Print-Only Presentations RobinsonM. A Year NEAR Eros, T pm, Rm. C PunA. Astrobiology II Posters, Th pm, UHCL Robinson M.S.* A Year NEAR Eros, T pm, Rm. C Purucker M. E.* Mars Magnets, T pm, Rm. B Robinson M. S. Lunar Mare ... Posters, T pm, UHCL Qiao K. Origins of Planet. ... Posters, T pm, UHCL Robinson M. S. A Year NEAR Eros Posters, T pm, UHCL Quinn R. C. Mars Surface ... I Posters, Th pm, UHCL Robinson M. S. Mercury ... Posters, T pm, UHCL QuinnR. C. Print-Only Presentations Robinson M. S. Remote Views ... Posters, Th pm, UHCL Quirico E. Cosmic Dust Posters, Th pm, UHCL Robinson M. S. Print-Only Presentations QuiricoE. Print-Only Presentations RoddyD.J. Impact ... Geology Posters Th pm, UHCL Racca G. Remote Views ... Posters, Th pm, UHCL Rodgers S.D. Presolar Grains, W pm, Rm. A Racca G. Print-Only Presentations Rodionova J. F. Print-Only Presentations RaceM. S. Small Bodies ... , Wpm, Rm. B Rodriguez N. Europa Surface ... Posters, Th pm, UHCL Radebaugh J.* Io: Inside and Out, W am, Rm. B Rodriguez S. Io: Inside and Out, W am, Rm. B Radebaugh J. Fire and Ice ... Posters, Th pm, UHCL Rogers D. Mars Volcanism Posters, Tpm, UHCL Rafkin S. C. R. Mars: Looking Down ... , F am, Rm. D Rojas R. Environmental ... Posters, T pm, UHCL Rages K. Mars: Looking Down ... , F am, Rm. D Romanek C. S. Planetary Formation ... Posters, Th pm, UHCL Raitala J. Venus Geology ... Posters, T pm, UHCL RomstedtJ. Carbonaceous ... Posters, Th pm, UHCL Raitala J. Print-Only Presentations Roncoli R. Mars Missions Posters, Th pm, UHCL Raitala J. T. Venus Geology ... Posters, Tpm, UHCL Rosemberg C. Mars: Looking Down ... , F am, Rm. D RajmonD.* Moon: Remote Sensing ... , Th pm, Rm. B Rosenberg N. D* Carbonaceous Chondrites, W am, Rm. A Rakonczai J. Mars Channels, ... Posters, T pm, UHCL Rosenberg N.D. Mars: Subsurface Ice ... , Th am, Rm. C Rampino M. R. Impact Cratering, T pm, Rm. D Rosenshein E. B. Mars Channels, ... Posters, T pm, UHCL RaoM.N. Mars Atmos .... Posters, Th pm, UHCL RosiekM. R. Mars Mapping Posters, T pm, UHCL Ratcliff J. T. Lunar Jambalaya ... Posters, T pm, UHCL RosiekM. R. Remote Views ... Posters, Th pm, UHCL Rathbun J. A* Io: Inside and Out, W am, Rm. B Rosk6F. Education Posters, T pm, UHCL Rawlings P. Education Posters, T pm, UHCL Rosk6F. Print-Only Presentations RayR. D. Europa Surface ... Posters, Th pm, UHCL Ross A. Cosmic Dust Posters, Th pm, UHCL Raymond C. A.* Mars Magnets, T pm, Rm. B Rossi A. P. Mars: Small Scale ... Posters, T pm, UHCL RaynaiP.I. Cosmic Dust Posters, Th pm, UHCL Rossi A. P. Planetary Formation ... Posters, Th pm, UHCL ReedyR. C. A Year NEAR Eros, T pm. Rm. C Rossman G. R. Missions, ... Posters, Th pm, UHCL Reedy R. C. Lunar Surfaces ... Posters, T pm, UHCL RostD. Carbonaceous Chondrites, W am, Rm. A ReedyR. C. A Year NEAR Eros Posters, T pm, UHCL RostD. Cosmic Dust Posters, Th pm, UHCL ReedyR. C. Missions, ... Posters, Th pm, UHCL Rotenberg E. Ordinary & Enstatite ... Posters, Th pm, UHCL ReedyR. C* Meteorites: Composition ... , F am, Rm. B RothL. E. Print-Only Presentations Reedy R. C. Print-Only Presentations Rothery D. A. Mars Missions Posters, Th pm, UHCL Reese Y. Moon: New Views ... , M am, Rm. B Rothman D. H. Mars Surface Drainage ... , W am, Rm. C Reese Y. Martian Meteorites, F am, Rm. C Roush T. L.* Small Bodies ... , W pm, Rm. B ReidR. J. Print-Only Presentations Rozanov A. Y u. Astrobiology II Posters, Th pm, UHCL Reimold W. U* Impact Cratering, T pm, Rm. D RozyczkaM. Origins of Planetary ... , M am, Rm. D Reimold W. U. Lunar Surfaces ... Posters, T pm, UHCL Rubin A. E. Chondrites: Nebular ... , Tam, Rm. A Reimold W. U. Impact ... Geology Posters Th pm, UHCL Rubin A. E. Refractory Inclusions, T pm, Rm. A Reimold W. U. Shock Processes ... Posters, Th pm, UHCL RubinA. E. Planetary Formation ... , Th am, Rm. D Reisener R. J. * Chondrites: Nebular ... , Tam, Rm. A RubinA. E. Print-Only Presentations Reynolds R. Mars Missions Posters, Th pm, UHCL RuffS. W.* Mars Volcanism: ... , M am, Rm. C Ricco A. J. Print-Only Presentations RuffS. W. Print-Only Presentations Rice J. W. Mars Surface Drainage ... , W am, Rm. C RushmerT.* Planetary Formation ... , Th am, Rm. D Rice J. W. Jr. Frozen Mars: Polar ... , M pm, Rm. C Russell B. Mars Surface ... I Posters, Th pm, UHCL Rice J. W. Jr. Print-Only Presentations Russell P. Mars Missions Posters, Th pm, UHCL Richardson D. C. Origins of Planetary ... , M am, Rm. D Russell P. S* Mars Volcanism: ... , M am, Rm. C Richardson M. I.* Mars: Looking Down ... , F am, Rm. D RussellS. S. Refractory Inclusions, T pm, Rm. A Richter F. M. * Refractory Inclusions, T pm, Rm. A RussellS. S. Meteorites: Isotopic ... Posters, Th pm, UHCL Riedel S. J. Mars Volcanism Posters, T pm, UHCL Rutherford M. J. Martian Meteorites ... Posters, T pm, UHCL RiederR. Martian Soil Chemistry ... , Th pm, Rm. C Rutherford M. J. Martian Soil Chemistry ... , Th pm, Rm. C RiederR. Print-Only Presentations Ryder G. Moon: New Views ... , M am, Rm. B Rietmeijer F. J. M. Cosmic Dust Posters, Th pm, UHCL Ryder G.* Lunar Impacts, T am, Rm. D

174 32nd LPSC Program Index Ryder G.* Impact Cratering, T pm, Rm. D Schwandt C. S. Missions, ... Posters, Th pm, UHCL Ryder G. Lunar Mare ... Posters, T pro, UHCL Schwandt C. S. Planetary Formation ... Posters, Th pro, UHCL Saito A. Angrites, Eucrites ... Posters, T pm, UHCL Schwartz J. M. Lunar Jambalaya ... Posters, T pm, UHCL Sakimoto S. E. H.* Mars Volcanism: ... , M am, Rm. C Schwartz J. M. Print-Only Presentations Sakimoto S. E. H. Mars Magnets, T pm, Rm. B Schwarz C. M. Missions, ... Posters, Th pm, UHCL Sakimoto S. E. H. Mars: Wrinkled ... Posters, T pm, UHCL Schweitzer M. Astrobiology II Posters, Th pm, UHCL Sakimoto S. E. H. Mars Channels, ... Posters, T pro, UHCL Scott D. H. Mars: Subsurface Ice ... , Th am, Rm. C Sakimoto S. E. H. Mars Volcanism Posters, T pro, UHCL Scott E. D. Print-Only Presentations Sakimoto S. E. H. Mars Mapping Posters, T pro, UHCL Scott E. R. D. Small Bodies ... , W pm, Rm. B Sakimoto S. E. H. Martian Canyons ... , W pro, Rm. C Scott E. R. D.* Angrites, Eucrites, ... , Wpm, Rm. D Salisbury J. W. Martian Soil Chemistry ... , Th pm, Rm. C Scott E. R. D. Meteorites: Composition ... , F am, Rm. B Salisbury J. W. Mars Missions Posters, Th pro, UHCL Scott R. S. Print-Only Presentations Sammartino P. Mars Surface ... II Posters, Th pm, UHCL Seabrook A. M. Mars Missions Posters, Th pm, UHCL Sarnrnonds P. R. Venus: Texture ... , M pm, Rrn. B Sears D. W. G. Asteroid-Meteorite ... Posters, T pm, UHCL Sandberg C. A. Impact ... Geology Posters Th prn, UHCL Sears D. W. G.* Small Bodies ... , W pm, Rrn. B Sanloup C.* Planetary Formation ... , Th am, Rrn. D Sears D. W. G. Print-Only Presentations Santiago S. S. Mars Volcanism Posters, T pro, UHCL Sears J. Astrobiology II Posters, Th pm, UHCL Sasaki S. Cosmic Dust Posters, Th pm, UHCL SeeT.H. Shock Processes ... Posters, Th prn, UHCL Sasaki S. Small Body ... Posters, Th pm, UHCL Seelos F. P. IV Mars Missions Posters, Th pm, UHCL Sasaki S. Print-Only Presentations Seifu D. Carbonaceous ... Posters, Th pm, UHCL Satoh H. Chondrules Posters, T pm, UHCL Selivanov A. S. Print-Only Presentations SatohH. Cosmic Dust Posters, Th pm, UHCL Semenenko V. P. Print-Only Presentations SatohJ. Planetary Formation ... Posters, Th pm, UHCL Semenova A. S. Lunar Surfaces ... Posters, T pm, UHCL Saunders R. S. Print-Only Presentations Semenova A. S. Print-Only Presentations SautterV. New Meteorites Posters, Th pm, UHCL Semjonova L. F. Print-Only Presentations Savarino J. Martian Meteorites ... Posters, T pm, UHCL Senshu H.* Planetary Formation ... , Th am, Rrn. D SavinaM. R. Presolar Grains, W pm, Rrn. A Sephton M. A. The Tagish Lake ... , M am, Rm. A Sawarynski M. Lunar Mare ... Posters, T pm, UHCL Sephton M. A. Tagish Lake ... Posters, T pm, UHCL Saylor J. Carbonaceous ... Posters, Th pm, UHCL Sephton M. A. Presolar Grains, W pm, Rrn. A SchauerR. Cosmic Dust Posters, Th pm, UHCL Shandera S. E. Missions, ... Posters, Th pm, UHCL Scheeres D. J. Small Bodies ... , W pm, Rm. B Shanteau R. L. Impact ... Geophy. Posters, T pm, UHCL Scheible R. Astrobiology II Posters, Th pm, UHCL Shappirio M. Missions, ... Posters, Th prn, UHCL Scheible R. T* Astrobiology III, F am, Rrn. A SharmaS. K. Mars Surface ... I Posters, Th pm, UHCL SchenkP. M. Outer Body ... Posters, T pm, UHCL Sharma S. K. Missions, :.. Posters, Th pm, UHCL SchenkP. M. Fire and Ice ... Posters, Th pro, UHCL SharpT. G. Chondrules, M pm, Rrn. A SchenkP. M. Europa Surface ... Posters, Th pm, UHCL SharpT. G.* Chondrites: Nebular ... , T am, Rm. A Schenker P. S. Mars Missions Posters, Th pro, UHCL SharpT. G. Impact Cratering, T pm, Rm. D Schieber J.* Astrobiology III, F am, Rm. A SharpT. G. Meteorites: Isotopic ... Posters, Th pm, UHCL Schiffman P. Mars Surface ... I Posters, Th pro, UHCL SharpT. G. Shock I'rocesses ... Posters, Th prn, UHCL Schilk A. J. Chondrules, M pm, Rm. A SharpT. G. Astrobiology III, F am, Rm. A Schlutter D. J. Cosmic Dust, Th pm, Rm. D SharpZ. D. Astrobiology II Posters, Th pm, UHCL Schrnerr N.C.* Mars Geophysics, T am, Rrn. C Sharpton V. L. Impact ... Geology Posters, Th pm, UHCL Schmitt B.* Io: Inside and Out, W am, Rro. B Shcherbakov R. Mars Geophysics, T am, Rm. C Schmitt B. Print-Only Presentations Shearer C. Martian Meteorites ... Posters, T prn, UHCL Schmitt H. H* Lunar Impacts, T am, Rrn. D Shearer C. K. * Moon: New Views ... , M am, Rrn. B Schmitt H. H.* Planetary Formation ... , Th am, Rm. D Shearer C. K. Chondrules, M pm, Rrn. A Schnabel C. Iron Meteorites Posters, Th pm, UHCL Shearer C. K. Lunar Mare ... Posters, T pm, UHCL Schnabel C. Meteorites: Composition ... , F am, Rrn. B Shearer C. K. Martian Meteorites ... Posters, T prn, UHCL Schofield T. Mars Missions Posters, Th pro, UHCL Shearer C. K. Planetary Formation I, W am, Rm. D Schorghofer N. Mars Surface Drainage .... W am, Rm. C Shearer C. K. Planetary Formation ... Posters, Th pm, UHCL Schroeder I. Lunar Surfaces ... Posters, T pm, UHCL Shearer C. K. Astrobiology II Posters, Th pm, UHCL Schubel K. A. Impact ... Geology Posters Th pro, UHCL Shearer C. K. Print-Only Presentations Schuh C. Outer Body Experiences, M pm, Rrn. D Shelfer T. D. Martian Soil Chemistry ... , Th pm, Rm. C Schultz L. Lunar Surfaces ... Posters, T pm, UHCL Shelfer T. D. Print-Only Presentations Schultz L. New Meteorites Posters, Th pro. UHCL Shepard M. K. Venus: Texture ... , M pm, Rm. B Schultz L. Ordinary & Enstatite ... Posters, Th pm, UHCL Shepard M. K. Missions, ... Posters, Th pm, UHCL Schultz L. Print-Only Presentations Sherman N. D. Europa Surface ... Posters, Th pm, UHCL Schultz P. H. Chondrites: Nebular ... , Tam, Rro. A Shestopalov D. I. Print-Only Presentations Schultz P. H. Impact Ejecta, T am, Rrn. B Shevchenko V. V. Print-Only Presentations Schultz P. H.* Lunar Impacts, T am, Rm. D ShihC.-Y.* Moon: New Views ... , M am, Rm. B Schultz P. H.* Impact Cratering, T pm, Rm. D ShihC.-Y. Martian Meteorites, F am, Rrn. C Schultz P. H. Modeling Impact ... Posters, T pm, UHCL Shingareva T.V.* Small Bodies ... , W pm, Rm. B Schultz R. A.* Mars Magnets, T pm, Rm. B Shinotsuka K. Carbonaceous Chondrites, W am, Rro. A Schultz R. A. Mars: Wrinkled ... Posters, T pro, UHCL Shiomi K. Remote Views ... Posters, Th pm, UHCL Schultz R. A. Martian Canyons ... , W pro, Rm. C Shirai K. Missions, ... Posters, Th pm, UHCL Schultz R. A. Print-Only Presentations Shkuratov Yu. G. Moon: Remote Sensing ... , Th pm, Rm. B Schwandt C. Moon: New Views ... , M am, Rm. B Shkuratov Yu. G. Remote Views ... Posters, Th pm, UHCL Schwandt C. Carbonaceous ... Posters, Th pro, UHCL Shock E. L. Europa Surface-Subsurface... , Th pm, Rm. A Schwandt C. Martian Meteorites, F am, Rro. C Shock E. L. Europa Surface ... Posters, Th pm, UHCL Schwandt C. S. Martian Meteorites ... Posters, T pm, UHCL Shock E. L. Print-Only Presentations

32nd LPSC Program Index ______l75 Shockey K. M. Mars Magnets, T pm, Rm. B Southam G. Astrobiology II Posters, Th pm, UHCL Shoemaker C. S. Impact ... Geology Posters Th pm, UHCL Southard R. Mars Surface ... I Posters, Th pm, UHCL Shoemaker C. S. Print-Only Presentations SpahrT. B. Small Body ... Posters, Th pm, UHCL Shoemaker E. M Print-Only Presentations Sparks J. Planetary Formation ... , Th am, Rm. D Showalter M. R. Outer Body ... Posters, T pm, UHCL Spaun N. A. Outer Body ... Posters, T pm, UHCL Shu F. Print -Only Presentations Spaun N. A. Europa Surface ... Posters, Th pm, UHCL ShuJ. Shock Processes ... Posters, Th pm, UHCL Spaun N. A. Print-Only Presentations Shukla A. D. Impact ... Geology Posters, Th pm, UHCL Spencer J. R. Io: Inside and Out, W am, Rm. B Shukolyukov A.* Meteorites: Composition ... , F am, Rm. B Spettel B. New Meteorites Posters, Th pm, UHCL Shukolyukov Yu. A. Lunar Surfaces ... Posters, T pm, UHCL SpildeM. N* Astrobiology III, F am, Rm. A Shuvalov V. V. Modeling Impact ... Posters, T pm, UHCL Spitale J. N. Environmental ... Posters, T pm, UHCL Shuvalov V. V. Impact ... Mars Posters, T pm, UHCL Spitale J. N. Small Body ... Posters, Th pm, UHCL Shuvalov V. V. Meteoroids Posters, Th pm, UHCL Spohn T.* Europa Surface-Subsurface ... , Th pm, Rm. A Sicardy B. Outer Body Experiences, M pm, Rm. D Spray J. G. Chondrites: Nebular ... ,Tam, Rm. A Sickafoose A. A. Lunar Surfaces ... Posters, T pm, UHCL Spray J. G. Impact Ejecta, T am, Rm. B SikA. Print-Only Presentations Springer R. J. Mars Data ... Posters, T pm, UHCL Silver M. H. Mars: Wrinkled ... Posters, T pm, UHCL Spudis P. Moon: Remote Sensing ... , Th pm, Rm. B Simakov M. B. Astrobiology II Posters, Th pm, UHCL Spudis P. D. Moon: New Views ... , M am, Rm. B Simon S. B.* The Tagish Lake ... , M am, Rm. A Spudis P. D. Lunar Mare ... Posters, T pm, UHCL Simonelli D. Fire and Ice ... Posters, Th pm, UHCL Spudis P. D.* Moon: Remote Sensing ... , Th pm, Rm. B Simons M. Mars Geophysics, T am, Rm. C Spudis P. D. Print-Only Presentations Simons M. Venus Geology ... Posters, T pm, UHCL Squyres S. Mars Missions Posters, Th pm, UHCL Simonson B. M.* Impact Ejecta, Tam, Rm. B Squyres S. W. Outer Body Experiences, M pm, Rm. D Simonson B. M. Impact ... Geology Posters, Th pm, UHCL Squyres S. W. A Year NEAR Eros, T pm, Rm. C Sims M. R. Mars Missions Posters, Th pm, UHCL Squyres S. W. A Year NEAR Eros Posters, T pm, UHCL Singletary S. 1.* Angrites, Eucrites, ... , W pm, Rm. D Squyres S. W. Mars Missions Posters, Th pm, UHCL Sinha M. P. Astrobiology I, Th am, Rm. A Stadermann F. 1.* Cosmic Dust, Th pm, Rm. D Sinha N. Refractory Inclusions Posters, T pm, UHCL StaidM. Moon: Remote Sensing ... , Th pm, Rm. B Sirono S. Planetary Formation ... Posters, Th pm, UHCL Staid M.I. Lunar Mare ... Posters, T pm, UHCL Sisterson J. M. Lunar Surfaces ... Posters, T pm, UHCL StaidM.I.* Moon: Remote Sensing ... , Th pm, Rm. B Sitko M. L. Cosmic Dust, Th pm, Rm. D Stankevich D. G. Remote Views ... Posters, Th pm, UHCL Skala R.* Impact Ejecta, Tam, Rm. B Stansbery E. K. Missions, ... Posters, Th pm, UHCL Skala R. Iron Meteorites Posters, Th pm, UHCL Starodubtseva O. M. Print-Only Presentations Skinner J. A. Mars Mapping Posters, T pm, UHCL Starr R. D. A Year NEAR Eros, T pm, Rm. C Skinner J. A. Impact ... Mars Posters, T pm, UHCL Starr R. D. A Year NEAR Eros Posters, T pm, UHCL Skinner J. A. Jr.* Martian Canyons ... , W pm, Rm. C Steele A.* Astrobiology I, Th am, Rm. A Skobeleva T. P. Print-Only Presentations Steele A. Astrobiology II Posters, Th pm, UHCL Skulan J. Astrobiology I, Th am, Rm. A Steele A. Astrobiology III, F am, Rm. A Slade M.A. Outer Body ... Posters, T pm, UHCL Steinberg J. T. Moon: New Views ... , Th am, Rm. B Slade M. A. Venus Geology ... Posters, T pm, UHCL Stephan T. Carbonaceous Chondrites, W am, Rm. A Slade M.A. Small Bodies ... ,Wpm, Rm. B Stephan T. Cosmic Dust Posters, Th pm, UHCL Slade M. A. Mars Missions Posters, Th pm, UHCL Stepinski T. F. Origins of Planetary ... , M am, Rm. D Slavney S. Mars Data ... Posters, T pm, UHCL Stem S. A. Print -Only Presentations Smailbegovic A. Mars Surface ... I Posters, Th pm, UHCL Steutel D.* Moon: Remote Sensing ... , Th pm, Rm. B SMART-I Team Remote Views ... Posters, Th pm, UHCL Stevens R. Mars Surface ... II Posters, Th pm, UHCL Smith C. L. Angrites, Eucrites ... Posters, T pm, UHCL Stevenson D. 1. Lunar Jambalaya ... Posters, T pm, UHCL Smith D. A Year NEAR Eros, T pm, Rm. C Stevenson D. J* Europa Surface-Subsurface ... , Th pm, Rm. A Smith D. E.* Mars Geophysics, T am, Rm. C Stevenson D. 1. Print-Only Presentations Smith D. E. A Year NEAR Eros, T pm, Rm. C Stewart S. T. Impact Ejecta, T am, Rm. B Smith G. A. Lunar Mare ... Posters, T pm, UHCL Stewart S. T.* Impact Cratering, T pm, Rm. D Smith G. A. Moon: Remote Sensing ... , Th pm, Rm. B Stewart S. T. Mars: Small Scale ... Posters, T pm, UHCL Smith M. D. Mars Surface ... II Posters, Th pm, UHCL Stewart S. T. Small Bodies ... , Wpm, Rm. B Smith P. Mars Missions Posters, Th pm, UHCL Stewart S. T. Martian Meteorites, F am, Rm. C Smrekar S. E. Venus: Texture ... , M pm, Rm. B Stirling J. A. R. Print -Only Presentations Smrekar S. E.* Mars Magnets, T pm, Rm. B Stocco K. Education Posters, T pm, UHCL Smrekar S. E. Venus Geology ... Posters, T pm, UHCL Stockstill K. R. Martian Meteorites ... Posters, T pm, UHCL Smrekar S. E. Planetary Formation ... Posters, Th pm, UHCL Stoddard P.R. Venus Geology ... Posters, T pm, UHCL Smythe W. D. Io: Inside and Out, W am, Rm. B Stofan E. R. Venus Geology ... Posters, T pm, UHCL Smythe W. D. Moon: Remote Sensing ... , Th pm, Rm. B Stofan E. R. Planetary Formation ... Posters, Th pm, UHCL Smythe W. D. Fire and Ice ... Posters, Th pm, UHCL Stofan E. R. Print-Only Presentations Snider N. O. Mars Missions Posters, Th pm, UHCL Stoker C. R. * Mars: Looking Down ... , F am, Rm. D Socki R. A. Planetary Formation ... Posters, Th pm, UHCL Stoker C. R. Print-Only Presentations Soderberg A. M. Small Body ... Posters, Th pm, UHCL Stolper E. M. Chondrules, M pm, Rm. A Soderblom L. A. Mars Data ... Posters, T pm, UHCL Stooke P. J. Outer Body ... Posters, T pm, UHCL Soderblom L. A. Print-Only Presentations Stooke P. J. Small Body ... Posters, Th pm, UHCL Solomon S. C.* Plenary, M pm, Rm. C Stough T. Mars Missions Posters, Th pm, UHCL Solomon S. C. Mars Geophysics, T am, Rm. C Strachan R. Mars Missions Posters, Th pm, UHCL Solomon S. C. Mercury ... Posters, T pm, UHCL Stroganov I. A. Print-Only Presentations Sotin C. Outer Body Experiences, M pm, Rm. D StromR. G. Mars Surface Drainage ... , W am, Rm. C Sotin C. Planetary Formation ... Posters, Th pm, UHCL StromR. G. Martian Canyons ... , Wpm, Rm. C

176 32nd LPSC Program Index StromR. G. Mars: Subsurface Ice ... , Th am, Rm. C TaylorS. Cosmic Dust Posters, Th pm, UHCL Strong 1. Martian Soil Chemistry ... , Th pm, Rm. C Tedesco E. F. Small Body ... Posters, Th pm, UHCL Strong 1. Mars Surface ... I Posters, Th pm, UHCL Teeter G. Europa Surface-Subsurface... , Th pm, Rm. A Sucharski T. Remote Views ... Posters, Th pm, UHCL TegnerC. Planetary Formation I, W am, Rm. D Sucharski T. Print-Only Presentations Tejfel V. G. Print-Only Presentations Sucharski T. L. Mars Data ... Posters, T pm, UHCL Telouk P. Planetary Formation I, W am, Rm. D Sugihara T. Remote Views ... Posters, Th pm, UHCL Teplov V. A. Meteoroids Posters, Th pm, UHCL Sugiura N.* Refractory Inclusions, T pm, Rm. A Tera F. Carbonaceous Chondrites, W am, Rm. A Sugiyama K. Angrites, Eucrites ... Posters, T pm, UHCL TeraF.* Planetary Formation I, W am, Rm. D Sullivan R. Mars: Small Scale ... Posters, T pm, UHCL Tera F. Presolar Grains, W pm, Rm. A Sun H. Astrobiology I, Th am, Rm. A Terrell D. Print-Only Presentations Sunkara B. Cosmic Dust Posters, Th pm, UHCL Terribilini D. Lunar Impacts, T am, Rm. D Sunshine 1. M. * Moon: Remote Sensing ... , Th pm, Rm. B The L.-S. Presolar Grains, W pm, Rm. A Supulver K. D. Mars Polar Posters, T pm, UHCL ThenoT. W. Moon: New Views ... , M am, Rm. B SuttonS. R. Missions, ... Posters, Th pm, UHCL ThenoT. W. Education Posters, T pm, UHCL SuttonS. R. Cosmic Dust Posters, Th pm, UHCL Therkelsen 1. P. Mars Volcanism Posters, T pm, UHCL SuttonS. R. Meteorites: Isotopic ... Posters, Th pm, UHCL Therriault A. M. Impact ... Geology Posters Th pm, UHCL SwiftM.R. A Year NEAR Eros, T pm, Rm. C Thiemens M. H. The Tagish Lake ... , M am, Rm. A Swindle T. Remote Views ... Posters, Th pm, UHCL Thiemens M. H. Martian Meteorites ... Posters, T pm, UHCL Swindle T. D. Martian Meteorites ... Posters, T pm, UHCL Thiemens M. H. Carbonaceous Chondrites, W am, Rm. A Swindle T. D. Mars Surface Drainage ... , W am, Rm. C Thiemens M. H. Martian Meteorites, F am, Rm. C Swindle T. D. Planetary Formation ... Posters, Th pm, UHCL Thomas C.* Outer Body Experiences, M pm, Rm. D Swindle T. D. Europa Surface ... Posters, Th pm, UHCL Thomas C. Outer Body ... Posters, T pm, UHCL Sylvester P. 1. Planetary Formation ... , Th am, Rm. D Thomas C. Print-Only Presentations Syono Y. Impact ... Geology Posters Th pm, UHCL Thomas N. Mars Surface ... II Posters, Th pm, UHCL Szakrrniny Gy. Print-Only Presentations Thomas N. Mars Missions Posters, Th pm, UHCL Szatluruiry E. Print-Only Presentations Thomas P. A Year NEAR Eros, T pm, Rm. C Szilassi L. Print-Only Presentations Thomas P. A Year NEAR Eros Posters, T pm, UHCL Tachibana S. * Chondrites: Nebular ... ,Tam, Rm. A Thomas P. C. A Year NEAR Eros, T pm, Rm. C Tachikawa O. Tagish Lake ... Posters, T pm, UHCL ThomasR.1. Impact ... Geology Posters, Th pm, UHCL TadaR. Environmental ... Posters, T pm, UHCL Thomas-Keprta K. Martian Meteorites ... Posters, T pm, UHCL Tajika E. Mars Channels, ... Posters, T pm, UHCL Thomas-Keprta K. Astrobiology II Posters, Th pm, UHCL Tajika E. Environmental ... Posters, T pm, UHCL Thomas-Keprta K. L. * Astrobiology I, Th am, Rm. A Tajika E. Mars Atrnos .... Posters, Th pm, UHCL Thomas-Keprta K. L. Mars Surface ... I Posters, Th pm, UHCL Tajika E. Astrobiology II Posters, Th pm, UHCL Thomas-Keprta K. L. Cosmic Dust Posters, Th pm, UHCL Takagi M. Mars Mapping Posters, T pm, UHCL Thomas-Keprta K. L. Astrobiology II Posters, Th pm, UHCL Takarniya I. Mars Channels, ... Posters, T pm, UHCL Thompson K. T. Mars Data ... Posters, T pm, UHCL TakaokaN. The Tagish Lake ... , M am, Rm. A Thompson K. T. Mars Mapping Posters, T pm, UHCL TakaokaN.* Carbonaceous Chondrites, W am, Rm. A Thompson P. B. Education Posters, T pm, UHCL Takayama H. Environmental ... Posters, T pm, UHCL Thompson T. W. Mars Missions Posters, Th pm, UHCL Takeda H. Lunar Mare ... Posters, T pm, UHCL Thomson B. Mars Missions Posters, Th pm, UHCL Takeda H.* Meteorites: Composition ... , F am, Rm. B Thomson B. 1.* Frozen Mars: Polar ... , M pm, Rm. C Takizawa Y. Remote Views ... Posters, Th pm, UHCL Thomson B. 1. Print-Only Presentations Tanaka K. L.* Mars Volcanism: ... , M am, Rm. C Thomson R. E.* Europa Surface-Subsurface... , Th pm, Rm. A Tanaka K. L. Mars Data ... Posters, T pm, UHCL Thorsos I. E. Environmental ... Posters, T pm, UHCL Tanaka K. L. Mars Mapping Posters, T pm, UHCL Throop H. B. Outer Body ... Posters, T pm, UHCL Tanaka K. L. Impact ... Mars Posters, T pm, UHCL TimkoM. Print-Only Presentations Tanaka K. L. Martian Canyons ... , Wpm, Rm. C Titus T. N. Mars Surface Drainage ... , W am, Rm. C Tanaka K. L. Mars: Subsurface Ice ... , Th am, Rm. C Tobola K. Education Posters, T pm, UHCL Tanaka K. L. Mars Missions Posters, Th pm, UHCL Toft B. Cosmic Dust Posters, Th pm, UHCL Tanaka K. L. Print-Only Presentations TomaruA. Angrites, Eucrites ... Posters, T pm, UHCL Tanaka S. Remote Views ... Posters, Th pm, UHCL Tomasella L. Print-Only Presentations TannerR. Mars Missions Posters, Th pm, UHCL TomiokaN. Chondrites: Nebular ... , T am, Rm. A Taranik 1. Mars Surface ... I Posters, Th pm, UHCL TomiokaN. Shock Processes ... Posters, Th pm, UHCL Tate A.* Mars Magnets, T pm, Rm. B TompkinsS* Moon: Remote Sensing ... , Th pm, Rm. B Taylor G. 1. Moon: New Views ... , M am, Rm. B TonuiE. The Tagish Lake ... , M am, Rm. A Taylor G. 1. Moon: Remote Sensing ... , Th pm, Rm. B TonuiE. Carbonaceous Chondrites, W am, Rm. A Taylor G. 1.* Societal Connections ... ,Th pm, Rm. A Tonui E. K. New Meteorites Posters, Th pm, UHCL Taylor G. 1. Print-Only Presentations Tonzola C. Impact ... Geology Posters Th pm, UHCL Taylor L.A. Lunar Impacts, T am, Rm. D Toporski 1. Astrobiology III, F am, Rm. A Taylor L.A. Lunar Surfaces ... Posters, T pm, UHCL Toporski 1. K. W.* Astrobiology I, Th am, Rm. A Taylor L.A. Martian Meteorites ... Posters, T pm, UHCL Toporski 1. K. W. Astrobiology I, Th am, Rm. A Taylor L.A. Refractory Inclusions Posters, T prn, UHCL Toppani A.* Cosmic Dust, Th pm, Rm. D TaylorL. A. Astrobiology I, Th am, Rm. A TorokK. Impact ... Geology Posters Th pm, UHCL TaylorL. A. Remote Views ... Posters, Th pm, UHCL T6th Sz. Print-Only Presentations Taylor L.A. New Meteorites Posters, Th pm, UHCL TownerM. C. Outer Body ... Posters, T pm, UHCL Taylor L.A. Astrobiology Ill, F am, Rm. A TownerM. C. Mars Missions Posters, Th pm, UHCL Taylor L.A. Martian Meteorites, F am, Rm. C Travis B. 1.* Mars: Subsurface Ice ... , Th am, Rm. C Taylor L.A. Print-Only Presentations Treiman A. H. Martian Meteorites ... Posters, T pm, UHCL TaylorS.* Cosmic Dust, Th pm, Rm. D Treiman A. H. Education Posters, T pm, UHCL

32nd LPSC Program Index ______117 Treiman A. H.* Astrobiology I, Th am, Rm. A Vilas F. Small Body ... Posters, Th pm, UHCL Tribbett K. L. Mars Volcanism Posters, T pm, UHCL Vita-Finzi C. Venus: Texture ... , M pm, Rm. B Trilling D. E. Origins of Planetary ... , M am, Rm. D VocadloL. Planetary Formation ... , Th am, Rm. D Trilling D. E. Small Bodies ... , W pm, Rm. B VogelN. Print-Only Presentations Trionfetti G. Remote Views ... Posters, Th pm, UHCL Vondrak R. R. Moon: New Views ... , Th am, Rm. B Tripathi A. Impact ... Geology Posters Th pm, UHCL Voss M. E. Small Bodies ... , Wpm, Rm. B Tripathi R. P. Impact ... Geology Posters Th pm, UHCL WadhwaM.* Martian Meteorites, F am, Rm. C Trombka J. 1.* A Year NEAR Eros, T pm, Rm. C WagnerR. Outer Body Experiences, M pm, Rm. D TrombkaJ.I. A Year NEAR Eros Posters, T pm, UHCL WagnerR. Outer Body ... Posters, T pm, UHCL Trump D. Mars Volcanism Posters, T pm, UHCL WagnerR. Fire and Ice ... Posters, Th pm, UHCL Tsuchiyama A* Chondrules, M pm, Rm. A WagnerR. Print-Only Presentations Tsukamoto K. Chondrules Posters, T pm, UHCL Walker G. A. H. Small Body ... Posters, Th pm, UHCL Tsukamoto K. Cosmic Dust Posters, Th pm, UHCL Walker R. J* Planetary Formation ... , Th am, Rm. D Tsunemi H. Missions, ... Posters, Th pm, UHCL Wallace B. J. Small Body ... Posters, Th pm, UHCL Tuckwell G. W.* Venus: Texture ... , M pm, Rm. B Wallis D. W. Impact ... Mars Posters, T pm, UHCL Tuckwell G. W. Europa Surface ... Posters, Th pm, UHCL WalshM.M. Astrobiology I, Th am, Rm. A Tufts B. R. Europa Surface-Subsurface ... , Th pm, Rm. A WalshM.M. Astrobiology III, F am, Rm. A Tufts B. R. Europa Surface ... Posters, Th pm, UHCL WalterM.J. Planetary Formation ... , Th am, Rm. D Tufts B. R. Astrobiology III, F am, Rm. A Wang A. Lunar Impacts, T am, Rm. D Tunyi I. Print-Only Presentations Wang A.* Astrobiology I, Th am, Rm. A Turcotte D. L.* Mars Geophysics, T am, Rm. C Wang A. Mars Missions Posters, Th pm, UHCL Turtle E. Fire and Ice ... Posters, Th pm, UHCL Wang A. Print-Only Presentations Turtle E. P. Modeling Impact ... Posters, T pm, UHCL Wang D. Shock Processes ... Posters, Th pm, UHCL Turtle E. P. Io: Inside and Out, W am, Rm. B Wang H. Mars Atmos .... Posters, Th pm, UHCL Turtle E. P.* Mars: Subsurface Ice ... , Th am, Rm. C WangJ. Martian Meteorites, F am, Rm. C Turtle E. P. Fire and Ice ... Posters, Th pm, UHCL WangJ. H. Meteorites: Isotopic ... Posters, Th pm, UHCL Turtle E. P. Europa Surface ... Posters, Th pm, UHCL Wanke H. Martian Soil Chemistry ... , Th pm, Rm. C UedoY. Impact Cratering, T pm, Rm. D Wanke H. Print-Only Presentations Uedo Y. Impact ... Geology Posters, Th pm, UHCL WardJ. G. Mars Surface ... TI Posters, Th pm, UHCL UedoY. Iron Meteorites Posters, Th pm, UHCL WarkD.A. Refractory Inclusions Posters, T pm, UHCL Ullmann J. Lunar Surfaces ... Posters, T pm, UHCL WarkD.A. Print-Only Presentations Ulyanov A. A. Refractory Inclusions Posters, T pm, UHCL Warmflash D. Astrobiology II Posters, Th pm, UHCL Ulyanov A. A. Print-Only Presentations Warmflash D. M. Astrobiology II Posters, Th pm, UHCL Upadhyay C. Impact ... Geology Posters Th pm, UHCL WarnerM.R. Impact ... Geophy. Posters, Th pm, UHCL Urquhart-Kelly M. A Year NEAR Eros, T pm, Rm. C Warner N.H. Mars Volcanism Posters, T pm, UHCL Urrntia-Fucugauchi J. Impact ... Geophy. Posters, Th pm, UHCL WarrenJ. L. Missions, ... Posters, Th pm, UHCL Ustinova G. K. Print-Only Presentations WarrenJ. L. Cosmic Dust Posters, Th pm, UHCL Vaisnys A. Mars Missions Posters, Th pm, UHCL WarrenP. H. Lunar Surfaces ... Posters, T pm, UHCL ValiH. Astrobiology I, Th am, Rm. A Warren P. H* Angrites, Eucrites, ... , W pm, Rm. D ValiH. Martian Meteorites, F am, Rm. C WarrenP. H. Print-Only Presentations van der Bogert C. H.* Chondrites: Nebular ... , Tam, Rm. A WiischE. Angrites, Eucrites, ... , Wpm, Rm. D van der Kolk D. A. Mars Volcanism Posters, T pm, UHCL WiischE. Print-Only Presentations Vanhala H. A. T.* Origins of Planetary ... , M am, Rm. D Wasilewski P. J. Chondrules Posters, T pm, UHCL Vaniman D. T. Missions, ... Posters, Th pm, UHCL Wasserburg G. J. Impact Ejecta, T am, Rm. B Van Orman J. A. Lunar Mare ... Posters, T pm, UHCL Wasserburg G. J. Lunar Impacts, T am, Rm. D van Susante P. Education Posters, T pm, UHCL Wasserburg G. J. * Refractory Inclusions, T pm, Rm. A van Susante P. Print-Only Presentations Wasserburg G. J. Meteorites: Composition ... , F am, Rm. B Vanzani V. Print-Only Presentations Wasserman A. A.* Impact Ejecta, Tam, Rm. B VarelaM. E. Angrites, Eucrites ... Posters, T pm, UHCL Wasserman A. A. Planetary Formation I, W am, Rm. D VarelaM. E. Angrites, Eucrites, ... , W pm, Rm. D Wasserman A. A. Planetary Formation ... Posters, Th pm, UHCL Varela M. E. Print-Only Presentations WassonJ. T. Chondrites: Nebular ... , T am, Rm. A Varga V. Education Posters, T pm, UHCL Wasson J. T. Refractory Inclusions, T pm, Rm. A VasutJ. A. Print-Only Presentations Wasson J. T. Meteorites: Composition ... , F am, Rm. B Vaughan R. G. Mars Surface ... I Posters, Th pm, UHCL Wasson J. T. Print-Only Presentations Veeder G. J. Io: Inside and Out, W am, Rm. B Watanabe N. Planetary Formation ... Posters, Th pm, UHCL VelbelM. A. Mars Surface ... I Posters, Th pm, UHCL Watters T. R. Mars Magnets, T pm, Rm. B Venance K. Print-Only Presentations Watters T. R. Mercury ... Posters, T pm, UHCL V enance K. E. Tagish Lake ... Posters, T pm, UHCL Watters T. R. Remote Views ... Posters, Th pm, UHCL V erchovsky A. B. The Tagish Lake ... , M am, Rm. A Watters T. R. Print-Only Presentations Verchovsky A. B. Angrites, Eucrites ... Posters, T pm, UHCL WdowiakT. Mars Missions Posters, Th pm, UHCL Verchovsky A. B.* Presolar Grains, W pm, Rm. A B.* Mars Volcanism: ... , M am, Rm. C Verchovsky A. B. Print-Only Presentations Weber H. W. New Meteorites Posters, Th pm, UHCL Verma H. C. Impact ... Geology Posters, Th pm, UHCL Weber H. W. Ordinary & Enstatite ... Posters, Th pm, UHCL VeverkaJ. A Year NEAR Eros, T pm, Rm. C Weber H. W. Print-Only Presentations VeverkaJ. A Year NEAR Eros Posters, T pm, UHCL Weber!. Cosmic Dust Posters, Th pm, UHCL Vicenzi E. P. Martian Meteorites ... Posters, T pm, UHCL Weckwerth G. Print-Only Presentations Vickerman J. C. Martian Meteorites ... Posters, T pm, UHCL Weidenschilling S. 1.* Origins of Planetary ... , M am, Rm. D Vidal A. Mars Surface Drainage ... , W am, Rm. C Weidenschilling S. J. Small Bodies ... , W pm, Rm. B Vilas F. A Year NEAR Eros, T pm, Rm. C Weidenschilling S. J. Small Body ... Posters, Th pm, UHCL Vilas F. Small Bodies ... ,Wpm, Rm. B Weisberg M. K. Chondrites: Nebular ... , Tam, Rm. A

178 32nd LPSC Program Index Weiss B. P.* Martian Meteorites, F am, Rm. C Wood J. A. Print-Only Presentations Weiss D. Meteorites: Isotopic ... Posters, Th pm, UHCL Worden S. P. Small Body ... Posters, Th pm, UHCL Weitz C. M.* Martian Canyons ... , Wpm, Rm. C Wright I. P. The Tagish Lake ... , M am, Rm. A WeitzC.M. Martian Soil Chemistry ... , Th pm, Rm. C Wright I. P. Angrites, Eucrites ... Posters, T pm, UHCL WellerL. Outer Body ... Posters, T pm, UHCL Wright I. P. Presolar Grains, W pm, Rm. A Wellnitz D. A Year NEAR Eros, T pm, Rm. C Wright I. P. Mars Missions Posters, Th pm, UHCL Welten K. C.* Meteorites: Composition ... , F am, Rm. B Wright I. P. Cosmic Dust Posters, Th pm, UHCL Wentworth S. J. Martian Meteorites ... Posters, T pm, UHCL WyattM. B.* Martian Soil Chemistry ... , Th pm, Rm. C Wentworth S. J. Astrobiology I, Th am, Rm. A WyattM. B. Mars Surface ... ll Posters, Th pm, UHCL Wentworth S. J. Moon: New Views ... , Th am, Rm. B Wynn-Williams D. D. Mars Channels, ... Posters, T pm, UHCL Wentworth S. J. Mars Surface ... I Posters, Th pm, UHCL Wynn-Williams D. D. Mars Surface Drainage ... , W am, Rm. C Wentworth S. J. Astrobiology II Posters, Th pm, UHCL Wynn-Williams D. D. Astrobiology II Posters, Th pm, UHCL Westall F. Astrobiology I, Th am, Rm. A XieX. Shock Processes ... Posters, Th pm, UHCL Westall F. Astrobiology II Posters, Th pm, UHCL XieZ. Chondrites: Nebular ... , T am, Rm. A Westall F.* Astrobiology III, F am, Rm. A XieZ. Shock Processes ... Posters, Th pm, UHCL Wetherill G. W.* Origins of Planetary ... , M am, Rm. D Xiong Y.-L.* Chondrites: Nebular ... , Tam, Rm. A White B. R. Print-Only Presentations Xirouchakis D. Planetary Formation ... Posters, Th pm, UHCL WhiteheadS. Mars Missions Posters, Th pm, UHCL Xirouchakis D. M. Martian Meteorites ... Posters, T pm, UHCL Widicus S. Environmental ... Posters, T pm, UHCL Yakovlev O. I. Moon: New Views ... , M am, Rm. B Wieczorek M. A. Frozen Mars: Polar ... , M pm, Rm. C Yakshinskiy B. V. Planetary Formation ... Posters, Th pm, UHCL Wieczorek M.A.* Lunar Impacts, T am, Rm. D Yamaguchi A. Angrites, Eucrites ... Posters, T pm, UHCL Wieczorek M. A.* Moon: New Views ... , Th am, Rm. B Y arnaguchi A. Angrites, Eucrites, ... , W pm, Rm. D WielerR. Origins of Planet. ... Posters, T pm, UHCL Yamamoto S. Modeling Impact ... Posters, T pm, UHCL WielerR. Presolar Grains, W pm, Rm. A Yamamoto S. Environmental ... Posters, T pm, UHCL WielerR. Iron Meteorites Posters, Th pm, UHCL YamamotoY. Missions, ... Posters, Th pm, UHCL WielerR. Meteorites: Composition ... , F am, Rm. B Yamazaki A. Remote Views ... Posters, Th pm, UHCL WielerR. Print-Only Presentations Yanai K. Angrites, Eucrites ... Posters, T pm, UHCL Wiens R. C. Moon: New Views ... , Th am, Rm. B YanoH. Small Bodies ... , W pm, Rm. B WiensR. C. Mars Missions Posters, Th pm, UHCL YazzieR. Mars Mapping Posters, T pm, UHCL Wiens R. C. Missions, ... Posters, Th pm, UHCL YelleR. V. Print-Only Presentations Wierzchos J. Astrobiology I, Th am, Rm. A Yen A. S. Missions, ... Posters, Th pm, UHCL Wiese. Cosmic Dust Posters, Th pm, UHCL Yen A. S.* Mars: Looking Down ... , F am, Rm. D WiesmannH. Moon: New Views ... , M am, Rm. B Yeomans D. K. A Year NEAR Eros, T pm, Rm. C WiesmannH. Martian Meteorites, F am, Rm. C Yeomans D. K. A Year NEAR Eros Posters, T pm, UHCL Willielms D. E. Frozen Mars: Polar ... , M pm, Rm. C YinQ.Z.* Planetary Formation I, W am, Rm. D Wilkins S. J.* Mars Magnets, T pm, Rm. B Yingst R. A.* Moon: New Views ... , M am, Rm. B Wilkins S. J. Mars: Wrinkled ... Posters, T pm, UHCL YingstR. A. Education Posters, T pm, UHCL Wilkison S. L. * A Year NEAR Eros, T pm, Rm. C Yoburn J. B. Mars Mapping Posters, T pm, UHCL Wilkison S. L. Mercury ... Posters, T pm, UHCL Yoder C. F. Lunar Jambalaya ... Posters, T pm, UHCL Williams D. A. Fire and Ice ... Posters, Th pm, UHCL Y okoyarna E. Cosmic Dust Posters, Th pm, UHCL WilliamsJ.G. Lunar Jambalaya ... Posters, T pm, UHCL Yoneda S. Carbonaceous Chondrites, W am, Rm. A Williams K. K. Mars Surface ... II Posters, Th pm, UHCL Yoneda S. New Meteorites Posters, Th pm, UHCL Williams K. K. Impact ... Geology Posters Th pm, UHCL Yoshida S. Remote Views ... Posters, Th pm, UHCL Williams R. M. Martian Canyons ... , W pm, Rm. C Yoshikawa I. Remote Views ... Posters, Th pm, UHCL Williams R. M. E. Mars Surface Drainage ... , W am, Rm. C Young D. A.* Venus: Texture ... , M pm, Rm. B Wilson G. R. Print-Only Presentations Young D. A. Venus Geology ... Posters, T pm, UHCL Wilson L.* Moon: New Views ... , M am, Rm. B YoungE. D.* Chondrules, M prn, Rm. A Wilson L.* Mars Volcanism: ... , M am, Rm. C YoungE. F. Print-Only Presentations Wilson L. Mars: Wrinkled ... Posters, T pm, UHCL YoungL. A. Print-Only Presentations Wilson L. Mars Channels, ... Posters, T pm, UHCL YurimotoH. Refractory Inclusions, T pm, Rm. A Wilson L. Lunar Mare ... Posters, T pm, UHCL Yurimoto H.* Refractory Inclusions, T pm, Rm. A Wilson L. lo: Inside and Out, W am, Rm. B YurimotoH. Chondrules Posters, T pm, UHCL Wilson L. Fire and Ice ... Posters, Th pm, UHCL Yurimoto H. Cosmic Dust Posters, Th prn, UHCL Wilson L. Print-Only Presentations Zabalueva E. V. Print-Only Presentations Wilson R. R. Fire and Ice ... Posters, Th pm, UHCL Zahnle K. J * Europa Surface-Subsurface ... , Th pm, Rm. A Winklliofer M. Astrobiology I, Th am, Rm. A ZikK. Impact Ejecta, T am, Rm. B Wirick S. Tagish Lake ... Posters, T pm, UHCL ZakharianA. Mars Geophysics, T am, Rm. C Wirick S. Cosmic Dust, Th pm, Rm. D Zarnecki J. C. Mars Missions Posters, Th pm, UHCL Withers P. Lunar Surfaces ... Posters, T pm, UHCL ZarttnanR. Martian Meteorites, F am, Rm. C Wlotzka F. Moon: New Views ... , M am, Rm. B ZebkerH. A. Outer Body ... Posters, T pm, UHCL Wolbach W. S. Environmental ... Posters, T pm, UHCL Zega T. J.* Chondrites: Nebular ... , Tam, Rrn. A WolfU. Moon: New Views ... , M am, Rm. B Zeigler R. A.* Lunar Impacts, T am, Rm. D WolfU. Lunar Mare ... Posters, T pm, UHCL Zeigler R. A. Lunar Surfaces ... Posters, T pm, UHCL WolffM. J. Print-Only Presentations ZemaM. Lunar Jambalaya ... Posters, T prn, UHCL WongM. Mars Volcanism: ... , M am, Rm. C Zender J. J. Mars Missions Posters, Th pm, UHCL WongM. P. Mars Volcanism Posters, T pm, UHCL ZeniA. P. Mars Surface ... I Posters, Th prn, UHCL Wood J. A. Chondrites: Nebular ... , Tam, Rm. A ZentA. P. Print-Only Presentations Wood J. A. Refractory Inclusions Posters, T pm, UHCL ZhangY. Angrites, Eucrites ... Posters, T prn, UHCL Wood J. A. Carbonaceous ... Posters, Th pm, UHCL ZhongM. Origins of Planet. ... Posters, T pm, UHCL Wood J. A. New Meteorites Posters, Th pm, UHCL Zhong S.* Mars Geophysics, T am, Rm. C

32nd LPSC Program Index ______l19 Zhong S. Print -Only Presentations Zolotov M. Yu* lo: Inside and Out, W am, Rm. B Zimbelman J. R. Mars Channels, ... Posters, T pm, UHCL Zolotov M. Yu. Europa Surface ... Posters, Th pm, UHCL Zimbelman J. R. Mars Volcanism Posters, T pm, UHCL Zolotov M. Yu. Print-Only Presentations Zimbelman J. R. Mars Mapping Posters, T pm, UHCL Zook H. A. Cosrrric Dust Posters, Th pm, UHCL Zimbelman J. R. Martian Canyons ... , W pm, Rm. C ZuberM. A Year NEAR Eros, T pm, Rm. C Zinner E.* Presolar Grains, W pm, Rm. A ZuberM. T.* Frozen Mars: Polar ... , M pm, Rm. C Zipfel J. Refractory Inclusions, T pm, Rm. A ZuberM. T. Mars Geophysics, T am, Rm. C Zipfel J. Martian Meteorites ... Posters, T pm, UHCL ZuberM. T. Lunar Impacts, T am, Rm. D Zipfe!J. Martian Meteorites, F am, Rm. C Zuber M. T. Mars Magnets, T pm, Rm. B Zolensky M. E.* The Tagish Lake ... , M am, Rm. A ZuberM. T. A Year NEAR Eros, T pm, Rm. C Zolensky M. E. Tagish Lake ... Posters, T pm, UHCL ZuberM. T. Mars Surface Drainage ... , W am, Rm. C Zolensky M. E. Asteroid-Meteorite ... Posters, T pm, UHCL Zuber M. T. Martian Canyons ... , W pm, Rm. C Zolensky M. E. Carbonaceous Chondrites, W am, Rm. A ZuberM. T. Moon: New Views ... , Th am, Rm. B Zolensky M. E. Carbonaceous ... Posters, Th pm, UHCL ZuberM. T. Print-Only Presentations Zolensky M. E. New Meteorites Posters, Th pm, UHCL Zolensky M. E. Print-Only Presentations

180 32nd LPSC Program Index