Program to Technical Sessions Thirty-Third Lunar and Planetary

Home , Cameron (crater), Carnot (crater), Chaplygin (crater), Clark (lunar crater), Dalton (crater), Denning (Martian crater)

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 Black, Co-Chair, Lunar and Planetary Institute Bruce Banerdt, Jet Propulsion Laboratory Gretchen Benedix, National Museum of Natural History Wendy Calvin, University of Nevada, Reno Barbara Cohen, University of Hawaii Donald Davis, Planetary Science Institute Eric Grosfils, Pomona College Joe Hahn, Lunar and Planetary Institute Gary Russ, Arizona State University Kathleen Johnson, Lunar and Planetary Institute Michael Kelley, Georgia Southern University Laurel Kirkland, Lunar and Planetary Institute Melissa Lane, Planetary Science Institute Robert Nichols, Washington University Alex Ruzicka, Portland State University Steve Saunders, Jet Propulsion Laboratory Pete Schultz, Brown University Chip Shearer, University of New Mexico Allan Treiman, Lunar and Planetary Institute Richard Walker, NASA Johnson Space Center Mike Zolensky NASA Johnson Space Center Bar

Harbour Paradise Reef Restaurant ...... _

Lobby Lobby A Entrance

Hunt Center Entrance

To South Harbour Center Gymnasium (Poster Sessions) ERRATA Thirty-Third Lunar and Planetary Science Conference March 11-15, 2002

Monday, March 11, 2002 Session Chair Change Early Evolution of the Moon: The Wonder Years L. E. Borg for S. Tompkins

Tuesday, March 12, 2002 Canceled Poster Mars Data Archiving, Distribution, and Analysis Techniques Blair M. Whitley V. H. Polf J. Banerjee D. McKeever S. W. S. Dating ofMmtian Sediments: Studies ofLuminescence from Materials Irradiated at Low Tempemtures [#1543] We present a system that can carry out luminescence dating procedures at low temperatures (-173 K) to simulate a Martian envil:onment. Also, we have conducted initial experiments to test the effect oflow temperatures on luminescence dating procedures.

Canceled Poster Mars Geology Kuzmin R. O. Ershow E. D. Komarow I. A. Kozlov A. H. Isaev V. S. The Comparative Morphometric Analysis ofPolygonal Terrains on Mars and the Em·th High Latitude Areas [#2030] The results of comparative morphometric analysis of polygonal terrains on Mars and the Earth are presented in the abstract.

Wednesday, March 13, 2002 Canceled Talk Mars Tectonics Mege D.* Cook A. C. Garel E. Lagabrielle Y. Cormier M-H. Surface Collapse and Volcanic Rifting on Mars [#2042] Usual models of volcanic rifting on Earth appropriately characterize "narrow graben" tectonics and volcanism on Mars.

Thursday, March 14, 2002 Poster to Print Only Mars Future Missions Goetz W. Kinch K. M. Harrit N. Jaehger M. Zych E. Madsen M. B. Knudsen J. M Ultraviolet Flux Dosimetry on the Swface ofMars [#1216] We outline the scientific potential of ultraviolet (UV) flux measurements on the surface ofMars and we describe a simple device for measuring the UV flux. Test experiments with a prototype device are presented and briefly discussed.

Canceled Poster Clash of Titans Castillo J. Rappaport N. Mocquet A. Satin C. Clues on Titan's Internal Strucftt1·efrom Cassini-Huygens Mission [#1989] This presentation estimates which aspects of Titan's internal structure will be derived from gravity potential measurements by Cassini-Huygens. In that purpose, dynamic Love numbers are computed for various models of the satellite.

Canceled Poster Surprising Things in Small Packages O'Brien D.P. Greenberg R. Constraining the Size-dependent Removal Rate ofAsteroids from the Main Belt [#1920] We use estimates of the main belt and NEA size distributions and develop a simple analytical method to calculate, from these estimates, the rates at which bodies are removed from the main belt and transferred to near-Earth space as a function of diameter.

Canceled Poster Three Icy Moons Hurford T. A. Jr. Greenberg R. Tides on a Compressible Sphere: Sensitivity of the H2 Love Number [#1589] Love derived tidal amplitudes by solving the continuum displacement equation which was simplified by his assumption of incompressibility. We derive tidal amplitudes using a more general displacement equation, accounting for compressibility.

CONFERENCE INFORMATION

Registration - LPI Open House

A combination Registration/Open House will be held Sunday, March 10, 2002, from 5:00 p.m. until 8:00 p.m. at the Lunar and Planetary Institute. Registration will continue at the South Shore Harbour Resort and Conference Center, Monday through Thursday, 8:00 a.m. to 5:00 p.m. A shuttle bus will be available to transport participants between the LPI and local hotels Sunday evening from 4:45 p.m. to 8:30p.m.

Business Center

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

Shuttle Bus Service

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

GUIDE TO TECHNICAL SESSIONS AND ACTIVITIES

Monday Morning, 8:30a.m. Salon A Early Evolution of the Moon: The Wonder Years Salon B Mars Volcanism Salon C The Cratered Earth Marina Plaza Ballroom Early Solar System Chronology Monday Afternoon, 1:30 p.m. Salon B PLENARY SESSION Presentation in Honor of the Retirement of Joseph M. Boyce followed by Presentation to the 2001 GSA Stephen E. Dwomik U.S. Citizen Student Paper Award Winners Monday Afternoon, 2:15p.m. SalonA SPECIAL SESSION: Early Lunar Cratering and the Impact Chronology of the Terrestrial Planets Session dedicated to Graham Ryder Salon B Mars Geology Salone Ordinary Chondrites: Metamorphism, Shock, History Marina Plaza Ballroom Analysis of Interplanetary Dust and Micrometeorites: The Key to Coming Sample Return Missions Monday Evening, 5:30p.m. LPI Great Room Reception honoring 2001 Stephen E. Dwornik Award Winners

Tuesday Morning, 8:30a.m. SalonA Venus Geology and Geophysics Salon B Mars Infrared Spectroscopy Salon C Cratering Processes and Products Marina Plaza Ballroom Chondrules and Early Solar System Processes Tuesday Afternoon, 1:30 p.m. SalonA The Lunar Regolith: Think Globally, Act Locally Salon B SPECIAL SESSION: Odyssey "Mars-We're Back!" Salon C Planetary Formation and Early Evolution Marina Plaza Ballroom Carbonaceous Chondrites: Primitive to Processed Tuesday Evening, 7:00- 9:30p.m. Gymnasium Poster Session I Carbonaceous Chondrites Organic Material in Meteorites Chondrites Pushing Technical Frontiers (Meteorites and IDPs) Iron Meteorites and Pallasites Lunar Regional Remote Sensing Lunar Geophysics: The Inside Story Lunar Regolith: Scratching the Surface Lunar Impacts and Meteorites Mars Geology Martian Surface Chemistry and Terrestrial Analogs Mars Volcanism Mars Data Archiving, Distribution, and Analysis Techniques Mars Landers and Landing Sites Geology and Geophysics of Venus and Mercury: Hot Rocks, Hot Science The Cratered Earth Cratering Processes and Products Interplanetary Dust and Micrometeorites Chronology: The Long and Short of It Planetary Formation and Early Evolution Education Wednesday Morning, 8:30a.m. Salon A Lunar Basalts: The Wind Cries Mare Salon B Martian Poles and Volatiles Salon C Mars Tectonics Marina Plaza Ballroom Presolar Grains I Wednesday Afternoon, 12:30 p.m. Salon B NRC Decadal Survey Town Hall Meeting Wednesday Afternoon, 1:30 p.m. Salon A Mars Magnetics and Gravity, Plus Mercury Salon B Astrobiology: "42" Salon C Borrelly and Eros Marina Plaza Ballroom Presolar Grains Ii 3:00 p.m. Mars Remote Sensing and Surface Science Wednesday Afternoon, 5:00 p.m. Salon B NASA Program Managers' Briefing Wednesday Evening, 6:00- 9:30p.m. Conference Social Event, Campbell Hall, Pasadena Fairgrounds Thursday Morning, 8:30 a.m. Salon A Europa's Icy Shell Game Salon B Martian Gullies and Mass Flow Salon C Mars: History, Crust, and Mantle Marina Plaza Ballroom Melted Meteorites: Different Differentiates Thursday Afternoon, I :30 p.m. Salon A Small Bodies, Big Science Salon B Io Burns: Ganymede Chills Salon C Martian Meteorites Marina Plaza Ballroom Refractory Inclusions Thursday Evening, 7:00-9:30 p.m. Gymnasium Poster Session II Martian Meteorites CAis, AOAs, and Dis Achondrites Lunar Basalts: The Mafic Truth Mars Craters Mars Tectonics Mars: Geophysics and Geochemistry Mars Polar Terrain and Processes Mars: Oceans, Lakes, Valleys, and Other Flowing Things Mars Remote Sensing Mars Aeolian and Atmospheric Processes Mars Future Instruments and Missions Isotopes, Gases, and Presolar Grains Between a Rock and a Cold Place Surprising Things in Small Packages Astrobiology Clash of the Titans Ice Rocks Three Icy Moons Io Origins: Stardust to Phyllosilicates Future Missions Friday Morning, 8:30a.m. Salon A Origins: Stardust to Phyllosilicates Salon B Mars: Flowing Ice, Water, and/or C02 Salon C Dust Devils, Dunes, and Craters Marina Plaza Ballroom Carbonate and Magnetite in ALH 84001

.. * Designates speaker

Monday, March 11, 2002 EARLY EVOLUTION OF THE MOON: THE WONDER YEARS 8:30 a.m. Salon A

Chairs: C. R. Neal S. Tompkins

Shearer C. K. * Borg L. E. Papike J. J. Trace Element and Petrologic Constraints on the Age of Lunar Ferroan Anorthosites [#1517] We investigate the distribution of trace elements in minerals in FAN 62236 to evaluate the role of lithology mixing on the Sm-Nd isotopic system.

Oberst J. * Mizutani H. A New Inventory of Deep Moonquake Nests Visible in the Apollo 12 Area [#1704] A new search for "Deep Moonquakes" was carried out among the approx. 3000 seismic events that have hitherto been listed as "unclassified" in the Apollo Seismic Event Catalog.

Borg L. E.* Shearer C. K. Nyquist L. E Norman M. D. Isotopic Constraints on the Origin of Lunar F erroan Anorthosites [#1396] Ferroan anorthosites have whole rock Nd isotopic compositions that are too radiogenic to have crystallized from a chondritic magma ocean. Mechanisms to disturb the whole rock Sm-Nd isotopic compositions are explored.

Nyquist L. E.* Bogard D. D. Shih C-Y. Wiesmann H. Negative ENd in Anorthositic Clasts in Yamato 86032 and MAC88105: Evidence for the LMO? [#1289] The LMO model predicts flotation cumulates with negative ENct values, but Apollo 16 FANs have positive ENct values. Ar-Ar ages plus bulk-rock Sm-Nd data for two FAN breccias from two lunar meteorites give negative ENct values.

Takeda H.* Nyquist L. E. Kojima H. Mineralogical Study of a Gray Anorthositic Clast in the Yamato 86032 Lunar Meteorite: Windows to the Far-Side Highland [#1267] We performed a mineralogical study of a large gray clast (Y86032,83-l). Comparing our data and an Ar-Ar age of 4.49 Ga and negative ENct data (Nyquist et al.), we propose that the original anorthosite is an important FAN of the farside highland.

Shih C-Y.* Nyquist L. E. Reese Y. Wiesmann H. Nazarov M.A. Taylor L.A. The Chronology and Petrogenesis of the Mare Basalt Clast from Lunar Meteorite Dhofar 287: Rb-Sr and Sm-Nd Isotopic Studies [#1344] The Sm-Nd isochron for lunar mare basalt meteorite Dhofar 287 A yields T = 3.46 ± 0.03 Ga and ENd= -0.6 ± 0.3. Its Rb-Sr isotopic system is severely altered. The basalt is unique, probably coming from an enriched mantle source.

Shervais J. W.* Snow C. A. Plagioclase Dissolution in the Lunar Magma Ocean: A New Model for the Origin of Lunar F erroan Anorthosites and the Rapid Growth of Highlands Crust [#1029] A new model for the rapid formation of lunar highlands crust which explains the negative slope of the ferroan anorthsite suite on the Fo-An diagram.

33rd LPSC Program------1 Longhi J.* The Extent of Early Lunar Differentiation [#2069] New calculations with a revised partial melting model show that a deep (> 1000 km) source with very low Al 20 3 concentration ( < 1.5 wt %) is required to produce the green mare volcanic glasses. No substantial amounts of primitive material could have been present.

Neal C. R.* Ely J. C. Sulfide Immiscibility in the Lunar Magma Ocean: Evidence for a Primitive Lunar Lower Mantle and the Origin of High-fl Mare Basalts [#1821] Chalcophile, lithophile, and highly siderophile elements are used to examine the source of mare volcanic products. The lunar magma ocean experienced extraction of an immiscible sulfide liquid during its crystallization. This accounts for the extreme high-fl values exhibited by mare basalts.

Stegman D. R.* Richards M.A. Baumgardner J. R. Mare Volcanism and the Early Thermal History of the Lunar Core [#1977] The evolution of a dense layer emiched in heat producing elements surrounding the lunar core may account for 1) the heterogeneous distribution of mare volcanism 2) the absence of a lunar magnetic field before 4 Ga and 3) the sudden appearance of one afterwards.

Wieczorek M. A.* Zuber M. T. The "Core" of the Moon: Iron or Titanium Rich? [#1384] Various lines of evidence have been used to suggest that the Moon possesses a small iron-rich core. Here we show that the geophysical data is equally consistent with the Moon, instead possessing a dense titanium-rich molten silicate "core."

Khan A.* Mosegaard K. Investigating the Lunar Velocity Structure Using Bayesian Statistics [#1548] We have presently applied bayesian statistical analysis to our results obtained from a Monte Carlo inversion of the Apollo limar seismic arrival time data. Using this type of analysis a thinner crust with a thickness of around 40 km is strongly favored.

Chenet H.* Gagnepain-Beyneix J. Lognonne P. A New Geophysical View of the Moon [#1684] We present here the results of a complete re-processing of the Apollo seismic data, and interpret seismic models in terms of chemical composition.

2 ------33rd LPSC Program Monday, March 11, 2002 MARS VOLCANISM 8:30 a.m. Salon B

Chairs: L. Wilson J. B. Plescia

Anderson R. C.* Dohm J. M. Haldemann A. F. C. Hare T. Comparative Investigation of the Geological Histories Among Alba Patera and Syria Planum, Mars [#1811] To better understand the evolution of the Tharsis magmatic complex, we performed a comparative investigation of the geological histories among two of the largest centers observed for Tharsis, Syria Planum and Alba Patera.

Ghatan G. J.* Head J. W. III Pratt S. Cavi Angusti, Mars: Evidence for Volcanic Activity, Ice Sheet Melting, and Basal Drainage of Water [#1054] We assess the influence of volcanic activity on the formation of the pits of Cavi Angusti. Evidence is presented for volcanic activity within the Cavi, and possible interaction with ice-rich material.

Wilson L.* Head J. W. III Volcanic Eruption Styles on Mars Due to Shallow Interactions Between Magma and Volatiles [#1275] Martian dikes commonly penetrate within -5 km of the surface and inject shallow sills into the cryosphere. We review the consequences of magma-cryosphere interactions taking account of dike and sill geometries and cryosphere volatile compositions.

McGill G. E.* The Small Domes and Pits of Cydonia Mensae and Adjacent Acidalia Planitia, Mars: Implications for the Role of Near-Surface Water or Ice [#1126] Small pitted domes and rimmed pits are very abundant on the plains within Cydonia Mensae and Acidalia Planitia. Most viable models for their origin involve interaction of volcanic processes with water or ice.

Glaze L. S. * Stofan E. R. Baloga S. M. McColley S. Sakimoto S. Mitchell D. MOLA Constraints on Lava Flow Rheologies [#1045] MOLA data allow us to distinguish the nature of a viscosity change in the presence of degassing. For a 35 km flow in Elysium we conclude that the viscosity increased exponentially at least 50 times, compared to only 10 times if no degassing occurs.

Baloga S.M.* Glaze L. S. Crisp J. A. . Channelized Lava Flows·with Density Changes During Emplacement [#1158] We explore the effects on emplacement of large basaltic lava flows due to (1) changes in viscosity, (2) formation of channels/levees, and (3) loss of volatiles that cause a change in lava density. These may explain why flows on Mars are not as thick as expected.

Riedel S. J.* Sakimoto S. E. H. MOLA Topographic Constraints on Lava Tube Effusion Rates for Alba Patera, Mars [#1410] Using high resolution MOLA topographic data to accurately model flow rates, we find that Alba Patera tube-fed flows within the mid to lower flanks could accommodate flow rates between 10 Pas to 1.303 x 106 Pas.

Plescia J. B.* Martian Volcano Morphometry [#1854] MOLA data allows the construction of DEMs of the martian volcanoes. This provides a data base from which to derive a morphometric data. The DEMs also allow recognition of morphologies indicative of aspects of the volcanic history that are not observed in imaging data.

33rd LPSC Program ------3 Gregg T. K. P.* Crown D. A. Sakimoto S. E. H. Volcanic Evolution and Erosion at Tyrrhena and Hadriaca Paterae, Mars [#1560] Tyrrhena and Hadriaca Paterae are low-relief central-vent volcanoes with shallowly sloping flanks dissected by radial channels. We present results of our investigations of channel formation, the Tyrrhena Patera lava flow field, and the relation between Hesperia Planum and Tyrrhena Patera.

Sakimoto S. E. H.* Mitchell D. Riedel S. J. Taylor K. Small Shield Volcanoes on Mars: Global Geometric Properties and Model Implications for Regional Varations in Eruptive Styles [#1717] Small martian volcanic shields geometric parameters show a global latitude dependence. Modeling results and observations are best explained by a sensitivity to an increasing availability of subsurface volatiles towards the polar regions.

Mitchell K. L. * Wilson L. Glaze L. S. Baloga S.M. Influence of Climate on Martian Magmatic Eruptions [#1734] Atmospheric pressure modulates volcanic eruption style. Buoyant plinian plumes are unlikely under current atmospheric conditions. We investigate differences in styles of activity on Mars under present-day and Earth-like atmospheric conditions.

Hynek B. M.* Arvidson R. E. Phillips R. J. Explosive Volcanism from Tharsis: Global Ev-idence in the Martian Geologic Record [#1408] MOLA data and geologic mapping indicate a global correlation of geologic units near the martian equator that we interpret as volcanic air fall deposits from past explosive volcanism in the Tharsis region.

Mouginis-Mark P. J.* Prodigious Ash Deposits near the Summit of Arsia Mons, Mars [#1407] MOC images are used to identify relatively young, spatially extensive, units interpreted to be the products of explos_ive volcanism close to the summit of Arsia Mons volcano, Mars. The implications for this type of activity are discussed.

4 ------33rd LPSC Program Monday, March 11, 2002 THE CRATERED EARTH 8:30 a.m. Salon C

Chairs: F. P. Horz B. M. Simonson

Simonson B. M. * Hassler S. W. Smit J. Sumner D. How Many Late Archean Impacts are Recorded in the Hamersley Basin of Western Australia? [#1772] Three large impacts at ca. 2.63 Ga, 2.54 Ga and early in the Paleoproterozoic were responsible for creating spherule layers in four formations in the Hamersley basin of Western Australia. The 2.63 Ga layer contains the coarsest ejecta of any known early Precambrian layer.

Shukolyukov A.* Castillo P. Simonson B. M. Lugmair G. W. Chromium in Late Archean Spherule Layers from Hamersley Basin, Western Australia: Isotopic Evidence for Extraterrestrial Component [#1369] The Cr isotopic composition in samples from two late Archean spherule layers from Hamersley Basin, Western Australia, indicates the presence of an extraterrestrial component and confirms the impact origin of these spherule layers.

Kaiho K.* Miura Y. Kedves M. Spherules with Fe,Ni-bearing Grains ofMeishan Permian-Triassic Boundary in China [#2052] We found spherules with Fe,Ni-bearing grains from Meishan Permian-Triassic boundary in China.

Kyte F. T.* Liu S. Iridium and Spherules in Late Eocene Impact Deposits [#1981] 2 Global Ir in late Eocene impact deposits is about 9 ng/cm , sufficient to support a 6 krn comet, capable of forming the Chesapeake Bay or Popigai impact structures. The commonly collected impact spherules (>63 microns) carry <1% of the total Ir.

Therkelsen J.P. Dyar M.D.* Delaney J. S. Johnson J. R. Horz F. Effects of Shock on Ferric Iron and Major Elements in Plagioclase, Pyroxene, and Olivine: First Reconnaisance [#1696] The redox state of Fe in minerals can serve as a sensitive proxy of redox conditions on planetary surfaces, but it may be altered by shock-related processes. In this study, we consider the effects of shock on ferric iron contents of plagioclase, pyroxene, and feldspar.

Elkins Tanton L. T.* Kelly D. C. Bico J. Bush J. W. M. Microtektites as Vapor Condensates, and a Possible New Strewn Field at 5 Ma [#1622] Evidence for a new tektite strewn field was recently recovered on ODP leg 189. The radial composition gradients in these tektites have lead to a hypothesis about the formation of microtektites by vapor condensation from an impact plume.

Koeberl C.* Gurov E. P. Geochemistry of Glassy Impactite "Bombs" from the Elgygytgyn Impact Structure (Russia): A Progress Report [#1353] Petrographic and geochemical data of glassy impactite bombs from the Elgygytgyn impact structure in Siberia are decribed. This is the only impact structure with shocked volcanic rocks.

Horz F.* Mittlefehldt D. W. See T. H. Compositional Mixing Models and the Depth of the Melt Zone at Meteor Crater, AZ [#1292] From the composition of the impact melts at Meteor Crater and comparisons with the composition of the target rocks, we estimated that the total melt depth at Meteor Crater, AZ was either <30m or >90 min depth.

33rd LPSC Program------5 Osinski G. R.* Spray J. G. Lee P. Carbonate Melt Rocks from the Haughton Impact Structure, Devon Island, Nunavut, Canada [#1077] The target rocks at the Haughton impact structure, Canada, are predominantly carbonates. The well preserved allochthonous crater-fill deposits are reinterpreted here as being carbonatitic impact melt rocks. The implications of our findings will be discussed.

Gilmour L* Franchi LA. Koeberl C. French B. M. A Raman Spectroscopic Study of Carbon Phases in Impact Melt Rocks and Breccias from the Gardnos Impact Structure, Norway [#1623] Raman spectroscopy suggests that the C was emplaced in at least two separate episodes into the impactites of the Gardnos impact structure.

BellM. S.* Horz F. Zolensky M. E. Deformation Effects in Experimentally Shocked Iceland Spar [#1817] Analysis of XRD profiles for Iceland Spar shocked from 10 to 60 GPa indicates that changes in peak intensity and peak Full Width at Half Maximum (FWHM) could reflect changes that may be influenced simply by diminishing crystallite size but possibly in combination with internal lattice deformation.

El Goresy A.* Gillet Ph. Mostefaoui S. Chen M. Masaitis V. L A Transparent, Very Hard, Dense and Unusually Disordered Form of Carbon in Heavily Shocked Gneisses from Popigai, Russia: Petrographic Settings and Comparison with a Similar Phase in Shocked Gneisses from the Ries [#1031] We report a transparent hard disordered carbon from Popigai and Ries. A novel optical and Raman diagnostic method to identify secondary graphite (formed by diamond-graphite back inversion at high post-shock temperatures) is presented.

Kenkmann T.* Hornemann U. St6ffler D. Transformation of Graphite to Diamond in Shock Experiments: A Raman Study [#1052] This is the first report of a successful synthesis of diamonds from natural rocks in shock experiments. A broad range of intermediate carbon structures coexist with diamond. Raman spectra of graphite can be used as shock barometers.

6 ------33rd LPSC Program Monday, March 11, 2002 EARLY SOLAR SYSTEM CHRONOLOGY 8:30 a.m. Marina Plaza Ballroom

Chairs: T. R. Ireland E. K. Zinner

Chaussidon M.* Robert F. McKeegan K. D. Incorporation of Short-lived 7Be in One CAl from the Allende Meteorite [#1563] The presence of large 7Li!6Li variations in one Allende CAI is best explained by the incorporation in this CAI of short-lived 7Be (half-life 52 days) produced by irradiation processes within the protosolar nebula.

Zinner E. K.* Hoppe P. Lugmair G. Radiogenic 26Mg in Ste. Marguerite and Forest Vale Plagioclase: Can 26Al be Used as Chronometer? [#1204] NanoSIMS isotopic measurements revealed 26Mg excesses in plagioclase from two H4 chondrites. Inferred 26 AU27 AI ratios relative to those of CAis, if compared to Mn-Cr and Pb/Pb ages, indicate widespread distribution of 26 AI in the early solar system.

Guan Y.* Huss G. R. MacPherson G. J. Leshin L.A. Aluminum-Magnesium Isotopic Systematics ofAluminium-rich Chondrules in Unequilibrated Enstatite Chondrites [#2034] First evidence of 26Mg* has been found in an Al-chondrule from UECs, with an inferred CZ6 AlP Al)o ratio of 5 (0.64 ± 0.27) X w- , supporting the idea that chondrules from C, 0, and E chondrites formed from a homogeneous 26 AI reservoir in the solar nebula.

Bogdanovski O. * Papanastassiou D. A. Wasserburg G. J. Cr Isotopes in Allende Ca-Al-rich Inclusions [#1802] We have determined Cr isotope compositions in minerals from Allende CAl in order to address the initial 53Mn (half-life 3.7 Ma) abundance in the solar system.

Kitts K.* Podosek F. A. Nichols R. H. Jr. Brannon J. C. Ramezani J. Korotev R. JoliffB. Chromium Isotopic Composition of Implanted Solar Wind from Apollo 16 Lunar Soils [#1822] We have measured the isotopic composition of solar wind Cr implanted in lunar soils to investigate whether the variations in 53 Cr represent an anomaly generated by inhomogeneity of a Cr carrier or in the distribution of 53Mn.

Hua X.* Huss G. R. Sharp T. G. 53Mn- 53 Cr Dating ofFayalite Formation in the Kaba CV3 Carbonaceous Chondrite [#1660] 53Cr excesses from Kaba fayalite were measured. The correlation between 53Cr excesses and Mn/Cr ratios 53 53 55 indicates the in situ decay of Mn. An error-weighted, least-squares, linear regression of the data yield ( Mn/ Mn)0 6 of (2.28 ± 0.37) X lQ- .

Ireland T. R.* Early Solar System Processes and Chronology [#1439] High precision chronology is a major limitation for detailing the chronology of processes in the early solar system.

Rotenberg E.* Amelin Y. Rb-Sr Chronology of Chondrules from Ordinary Chondrites [#1605] Chondritic silicates and individual chondrules have been shown to be precise U-Pb chronometers. Rb-Sr has been analysed in those same materials to compare the behaviour of the two isotopic systems in silicates and phosphates.

33rd LPSC Program------7 Amelin Y. * Grossman L. Krot A N. Pestaj T. SimonS. B. Ulyanov A A U-Pb Age of Refractory Inclusions from the CV Carbonaceous Chondrites Allende and Efremovka [#1151] U-Pb age of three CAis from Allende and two CAis from Efremovka is determined at 4568 ± 0.4 Ma.

Pravdivtseva O. V.* Amelin Y. Hohenberg C. M. Meshik A. P. I-Xe Dating: Comparison of I-Xe and Pb-Pb Ages of Richardton Chondrules and Separated Mineral Phases [#2041] 1-Xe and Pb-Pb ages of individual Richardton chondrules and different mineral phases were compared in order to test the absolute 1-Xe age normalization.

Becker H.* Walker R. J. Ruthenium Isotopic Composition of Terrestrial Materials, Iron Meteorites and Chondrites [#1018] Ru isotopic compositions of magmatic iron meteorites and chondrites overlap with terrestrial Ru at the 0.3-0.9 £level.

Dauphas N.* Marty B. Reisberg L. Molybdenum Isotope Systematics in the Solar System [#1198] The concentration of Mo in SiC is such that their contribution to the bulk meteorite Mo isotopic composition may be significant. We have found Mo isotope anomalies in bulk samples, reflecting variations in trapped circumstellar dust abundance.

Schonbachler M.* Lee D-C. Halliday A. N. Rehkamper M. Uniformity of Zirconium Isotopic Compositions in the Inner Solar System [#1283] Zr isotopic composition measurements for various bulk meteorites did not yield any resolvable isotopic anomaly in contrast to 2 Allende CAis which reveal a small but significant excess of 96Zr.

8 33rd LPSC Program Monday, March 11, 2002 PLENARY SESSION Session in Honor of the Retirement of Joseph M. Boyce 1:30-2:00 p.m. Salon B

Chairs: G. J, MacPherson M.J. Drake R.M. Walker

Joseph M. Boyce came to NASA Headquarters in 1977 from the U.S. Geological Survey. Joe has been at Headquarters longer than anyone else in the Solar System Exploration Division. He manages more grant programs (seven, at last count!) than all the other Discipline Scientists in the Solar System Exploration Division combined. In his "spare" time, he also serves as the Program Scientist for the Mars Global Surveyor and Genesis missions. Over the span of his career, Joe has gained unsurpassed experience and mastery. It will literally take three people to replace him; the number of tasks he manages would simply overwhelm any one new person. While Joe is retiring from NASA, he is not retiring from the field of planetary science. We look forward to his active and vibrant presence in our research community for a long time to come. -Jay Bergstralh, Associate Director, Solar System Exploration Division

Presentation Honoring Joseph M. Boyce

Presentation of the 2001 GSA Stephen E. Dwornik U.S. Citizen Student A ward Winners

33rd LPSC Program------9 Monday, March 11, 2002 SPECIAL SESSION EARLY LUNAR CRA TERING AND THE IMPACT CHRONOLOGY OF THE TERRESTRIAL PLANETS Session Dedicated to Graham Ryder 2:15p.m. Salon A

Graham Ryder was a premier lunar scientist who pioneered many of our most important concepts about the Moon and its evolution. Graham passed away on January 5, 2002, as a result of complications from cancer of the esophagus. He received his B.Sc. from the University of Wales (Swansea) (1970) and his Ph.D. from Michigan State University (1974), specializing in the petrology of igneous rocks. He did postdoctoral study with John Wood's group at the Smithsonian Astrophysical Observatory, was subsequently employed by Northrup Services Inc. in the Lunar Curatorial Facility at NASA Johnson Space Center, and since 1983 has been a Staff Scientist at the Lunar and Planetary Institute in Houston. Graham's work was instrumental in several areas oflunar science. He was among the first to recognize evidence in the lunar sample collection that mare volcanism began very early, before the end of the "late heavy bombardment." Graham's work with highland rocks and breccias clarified the processes and history of the lunar crust. He produced detailed catalogs and guides to the Apollo lunar sample collections, facilitating the scientific work of the entire sample community. As a result of these efforts, he was intimately familiar with the sample collections and could recite detailed characteristics of various samples and the results of studies associated with each. Graham's work helped provide the basis for understanding the geological context and petrological characteristics of the samples, which greatly advanced our understanding of the Moon's evolution. As part of his interest in the geological process of impact, Graham studied terrestrial impact breccias and melts and fully participated in the revolution in terrestrial geology that resulted from study of the Cretaceous-Tertiary impact and subsequent mass extinction. In recent years, Graham became interested in the problem of the early cratering history of the Moon (the so-called "lunar cataclysm") and undertook to obtain very precise radiometric ages of lunar impact melts to address this problem. This work produced revised estimates for the ages of major lunar impact events, a set of data that must be explained to unravel fully lunar history.

Graham's quick wit and insightful commentary enlivened many of the scientific meetings he organized, convened, and attended over the course of his career. Discussions that veered off track were soon brought back to point by Graham's encyclopedic knowledge of the sample collection. Graham thoroughly enjoyed the give and take of serious scientific debate, but he also enjoyed mischievously skewering pomposity, questioning conventional wisdom, and reminding the community of inconvenient facts and constraints on newly proposed "syntheses" and models. Graham is survived by his daughter Abigail, his parents and siblings in England, and hundreds of friends and colleagues around the world. Lunar science has benefited greatly from Graham's work and our lives have been enriched by his presence. We will miss him. - Paul D. Spudis

Chairs: B. A. Cohen L. Dones

Hartmann W. K.* [INVITED, 30 minutes] Interplanetary Correlation of Geologic Time Using Cratering Data [#1876] Basic principles of age estimation, based on crater populations, are discussed. Using a lunar calibration method, we can estimate ages of all terrestrial planets. The possible cataclysm at 3.9 Gy remains a puzzle.

10 ------33rd LPSC Program Cohen B. A.* [INVITED, 15 minutes] Geochemical and Geochronological Constraints on Early Lunar Bombardment History [#1984] The major geochemical and geochronological properties of impact melt rocks and breccias, including siderophile- element contamination and unique age distribution, are considered as constraints on the proposed Lunar Cataclysm or Late Heavy Bombardment.

Dones L.* [INVITED, 30 minutes] Dynamics of Possible Late Heavy Bombardment Impactor Populations [#1662] The existence of the later lunar basins implies the existence of a massive dynamical reservoir that can store small bodies for some 600-Myr after the Moon formed. We will discuss four recent models for such reservoirs.

Neukum G.* Ivanov B. A. Early Lunar Cratering Record [#1263] The projectile SFD derived from lunar craters demonstrate a good fit to the SFD of asteroids in the modern Main Belt. Whatever the nature of the LHB is, projectiles, which creates the most ancient crater populations, are collisionally evolved.

Chambers J. E.* Lissauer J. J. A New Dynamical Model for the Lunar Late Heavy Bombardment [#1093] We describe a new dynamical model for the late heavy bombardment in which a 5th terrestrial planet existed on an orbit that became unstable after 600 Myr, began crossing the asteroid belt, and enhanced the flux of impactors into the inner Solar System.

James O. B.* Distinctive Meteoritic Components in Lunar "Cataclysm" Impact-Melt Breccias [#1210] Lunar impact-melt breccias formed during the 3.9-Ga cataclysm contain distinctive and diverse meteoritic components having higher Au/Ir and Ge/lr, and in many cases higher Nillr, than the meteoritic components in granulitic breccias formed prior to 3.9 Ga. This evidence favors a lunar cataclysm.

Chen J. H.* Papanastassiou D. A Wasserburg G. J. Re-Os Isotope Systematics in Lunar Soils and Breccias [#1818] Lunar soil and breccia samples show a narrow range in 1870s/1880s, in the range for H-chondrites and unfractionated irons. All samples showemichments in 187Re/1880s, possibly reflecting loss of Os, associated with the terminal lunar cataclysm.

Chapman C. R.* Cohen B. A Grinspoon D. H. What are the Real Constraints on Commencement of the Late Heavy Bombardment? [#1627] Evidence concerning pre-Nectarian impact rates is subject to strong sampling biases for impact melts, favoring recent melts, perhaps due to preferential surficial deposition. Pending 3-D modelling, a "cataclysm" may or may not have occurred.

Elkins Tanton L. T.* Hager B. H. Grove T. L. Magmatic Effects of the Lunar Late Heavy Bombardment [#1422] Giant impacts can create large volumes of melt through instantaneous in-situ decompression and later convective melting. We present models for melt creation under the lunar basins, with hypotheses for the formation of the mafic lower crust and the mare basalts.

33rd LPSC Program 11 Monday, March 11, 2002 MARS GEOLOGY 2:15 p.m. Salon B

Chairs: H. V. Frey T.A.Maxwell

Chapman M. G.* Hare T. Sinus Meridiani Hematite Deposits, Mars: Results of a GIS-based Study of Regional MGS and Viking Data Sets [#1626] The concentrated crystalline hematite is a unique composition on Mars. A GIS-based study of regional MGS and Viking data sets is underway to shed light on the mysterious mineral deposit. The abstract presents the results of the study.

Arvidson R. E.* Deal K. Hynek B. M. Seelos F. P. IV Snider N. O. Mellon M. T. Garvin J. B. Thermal Inertia, Albedo, and MOLA-derived Roughness for Terrains in the Terra Meridiani Area, Mars [#1748] Surface properties of layered deposits draped on dissected, cratered terrain in the Terra Meridiani area are analyzed using remote sensing data. The etched plains are cemented and differentially eroded, and the hematite plains are loose and drifting.

Fergason R. L.* Christensen P.R. Relationship Between Small-Scale Suiface Features and Thermal Inertia Units [#1778] A study of martian surface features and thermal inertia relationships to determine unique surface characteristics and responsible processes.

Hiesinger H.* Head J. W. III Syrtis Major, Mars: Results from Mars Global Surveyor Data [#1063] Syrtis Major is one of the most prominent Hesperian volcanic complexes on Mars and is located west of the lsi dis impact basin. We used MOLA, MOC, TES and Viking data to investigate the evolution and geologic history of Syrtis Major.

Frey H. V.* Age and Origin of the Crustal Dichotomy in Eastern Mars [#1727] The crustal dichotomy in eastern Mars is largely due to the very large impact which produced the Utopia Basin. Buried impact basins on the Utopia Basin constrain the Utopia impact (and therefore the dichotomy) to be very Early Noachian in age. van Gasselt S.* Hauber E. Jaumann R. Morphology and Topography of Fretted Terrain at the Dichotomy Boundary in Tempe Terra, Mars: Quantitative Morphology of Slope Aprons and Mesas [#1856] We report on morphometric measurements of fretted terrain in Tempe Terra, described in general in a companion abstract (Hauber eta!., this volume). Measurements of areas and volumes of aprons and slopes were made to deduce characteristic values and relations for Tempe Terra.

Maxwell T. A.* Farley M.A. Irwin R. P. III Craddock R. A. Highland Fretted "Deposits" of the Martian Plains are Really Ancient Terrain [#1905] In the highland plains of Mars' equatorial region, what were interpreted to be aequeous deposits now appear to be. ancient, highly cratered terrain surrounded by plains materials.

12 ------33rd LPSC Program Crown D. A.* Pierce T. L. McElfresh S. B. Z. Mest S.C. Debris Aprons in the Eastern Hellas Region of Mars: Implications for Styles and Rates of Highland Degradation [#1642] MOC images and MOLA topographic data are used to characterize the distribution, surface morphology, and morphometry of debris aprons in the eastern He lias region of Mars in order to evaluate their mode of formation and assess implications for highland degradation.

Skinner J. A. Jr.* Tanaka K. L. Topography ofCircum-Chryse Chaotic Terrains: Evidence for Progressive Lowering of the Regional Volatile Table? [#1878] Measurements of the' floor elevations of chaotic terrains in the circum-Chryse region of Mars from MOLA data show that they decrease in elevation with decreasing age. This relation suggests that the ground-volatile table in this region has also lowered over time.

Buczkowski D. L.* McGill G. E. MOLA Topography Supports Drape-Folding Models for Polygonal Terrain of Utopia Planitia, Mars [#1020] Drape folding models for polygon formation predict that 1) circular grabens inferred to overlie buried crater rims will bound topographic lows and 2) this relief will be proportional to ring diameters. MOLA data support these predictions.

Fuller E. R.* Head J. W. III Geologic History of the Smoothest Plains on Mars (Amazonis Planitia) and Astrobiological Implications [#1539] MOLA data show that the extreme smoothness of Amazonis Planitia is a product of repeated resurfacing continuing to the geologic present. A model is presented to explain the common sources of fluvial and volcanic material in Marte Vallis.

33rd LPSC Program------13 Monday, March 11, 2002 ORDINARY CHONDRITES: METAMORPHISM, SHOCK, HISTORY 2:15p.m. Salon C

Chairs: T. A. Rushmer A. M. Ruzicka

Ruzicka A M. * Killgore M. Trace-Element Abundances in the Portales Valley Meteorite: Evidence for Geochemical Fractionations [#1918] Trace-element studies of various splits of Portales Valley suggest that both the silicate-rich and metallic portions of the meteorite breccia were geochemically fractionated.

Floss C.* Crozaz G. Liu M. Scott E. R. D. Piecing Together the Portales Valley Chronology Puzzle: Clues to the Origin of Unusually Young Sm-Nd Ages [#1084] REE distributions indicate that the silicate fraction of Portales Valley is chondritic. No combination of minerals can account for the depleted Sm/Nd ratios and young Sm/Nd ages previously reported for this meteorite.

Papanastassiou D. A.* Chen J. H. Wasserburg G. J. What Whole Rock Samples of Portales Valley Can and Cannot Tell Us [#1826] We are on our way to deciding that despite significant young disturbances, the Portales Valley breccia maintains vestiges of early formation.

Kessel R.* Beckett J. R. Stolper E. M. The Thermal History of Equilibrated Ordinary Chondrites and the Relationship Between Textural Maturity and Temperature [#1420] We obtained olivine-spinel equilibration temperatures ofH, L, and LL 4-6 chondrites. Temperature ranges are much smaller than previously assumed and are not correlated strongly with type.

Slater V. P.* McSween H. Y. Jr. A Critical Assessment of the Pyroxene and Plagioclase Geothermometers as Applied to Type 6 Ordinary Chondrites [#1582] . ·Clinopyroxenes in H6, L6, and LL6 meteorites record peak metamorphic temperatures l00°C higher than orthopyroxenes, which record temperatures at least l00°C higher than plagioclase in the same meteorite.

Beckett J. R.* Connolly H. C. Jr. On the Use of Phase and Bulk Compositions in Classifying Chondrules from Semarkona ( LL3.0) and Other Ordinary Chondrites [#1547] We distinguish different chondrule types and groups by using multiple constraints based on phase and bulk compositions.

Rushmer T.* Gaetani G. Jones J. H. Linking Ordinary and Enstatite Chondrites: Experimental Deformation Results Under Very Reducing Conditions [#1318] In reduced, deformation experiments on an ordinary H6 chondrite, we observe niningerite and oldhamite, which are found only in enstatite chondrites. The association of the reduced metal in shear zones suggests that deformation can enhance reaction.

Rubin A E.* Post-Shock Annealing of MIL99301 ( LL6) and Implications for Impact Heating of Ordinary Chondrites [#1053] Although MIL99301 (LL6) exhibits shock-stage S5 features, olivine has sharp optical extinction indicative of Sl. The rock experienced successive episodes of thermal metamorphism, shock and annealing. Because 26 AI would have decayed away, annealing must have been caused by impact heating.

14 ------33rd LPSC Program Friedrich J. M.* Bridges J. C. Lipschutz M. E. Evidence for Chemical Variations with Shock Loading in L Chondrite Falls [#1086] We have analyzed 62 equilibrated L chondrite falls for 51 elements by ICPMS and RNAA. We use our data to identify statistically significant geochemical fractionations in the L chondrite parent(s) resulting from shock related heating episodes.

Xie Z.* Sharp T. G. Fayalite-Spinel + Stishovite in Shocked Umbarger L6 Chondrite [#1859] Fayalite-spinel occurs naturally in shocked umbarger L6 chondrite. SAED data indicate Fe2Si04-spinel with unit cell 3.5% larger than that of synthetic Fe2Si04-spinel. Fe2Si04-spinel and stishovite crystallized from FeO-SiOz-rich alteration zones.

Kimura M. * Chen M. El Goresy A Ohtani E. Back Transformation of High-Pressure Phases in Shock-Melt Veins in Ordinary Chondrites During Atmospheric Passage [#1457] We report the first evidence for the back transformation of high- to low- pressure polymorphs in shock veins near fusion crusts in ordinary chondrites, which leads to quantification of the high-temperature regime depth below the fusion crusts.

33rd LPSC Program------15 Monday, March 11, 2002 ANALYSIS OF INTERPLANETARY DUST AND MICROMETEORITES: THE KEY TO COMING SAMPLE RETURN MISSIONS 2:15p.m. Marina Plaza Ballroom

Chairs: B. Marty D. E. Brownlee

MessengerS.* Keller L. P. Walker R. M. Discovery of Abundant Interstellar Silicates in Cluster IDPs [#1887] We report the discovery of abundant interstellar silicate grains in interplanetary dust particles. One of these grains is positively identified as forsterite by coordinated TEM imaging and isotopic analysis with the new NanoSIMS ion microprobe.

Dai Z. R. Bradley J.P.* Joswiak D.J. Brownlee D. E. Genge M. J. Nano-Diamonds in Interplanetary Dust Particles (IDPs), Micrometeorites, and Meteorites [#1321] Nano-diamonds have been identified in IDPs, micrometeorites, and meteorites. They appear to be depleted in non-cluster IDPs suggesting that some nano-diamonds are not presolar.

Brownlee D. E.* Joswiak D. J. Kress M. E. TaylorS. Bradley J. Survival of Carbon in Moderately to Stongly Heated IDPs and Micrometeorites [#1786] Refractory carbon survives atmospheric entry heating even in severely heated IDPs and micrometeorites. This material has very interesting properties and is a major and abundant source of solid carbon that falls on terrestrial planets in the first few 100 m.y. of their existence.

Flynn G. J.* Keller L. P. Joswiak D. Brownlee D. E. Infrared Analysis of Organic Carbon in Anhydrous and Hydrated Interplanetary Dust Particles: FTIR Identification of Carbonyl (C=O) in IDPs [#1320] We performed infrared spectroscopy on IDPs that were acid-etched to remove silicates, carbonates, and oxides that interfere with weak organic signatures. The carbonyl functional group was detected.

Keller L. P.* MessengerS. Flynn G. J. Wirick S. Jacobsen C .. Analysis of a Deuterium Hotspot in an Interplanetary Dust Particle: Implications for the Carrier of Hydrogen Isotopic Anomalies in IDPs [#1869] Analysis of deuterium hotspot in an IDP are presented. The carrier of the excess D associated with aliphatic and aromatic hydrocarbons.

Stephan T.* TOF-SIMS Analysis of Heavy-Nitrogen-carrying Phases in Interplanetary Dust [#1352] To identify possible carriers of heavy nitrogen, TOF-SIMS was used to investigate several IDPs, analyzed previously with the NanoSIMS. The results demonstrate that heavy nitrogen in at least two IDPs is clearly correlated with high Mg/Fe-ratios.

Aleon J.* Robert F. Chaussidon M. Marty B. Engrand C. 15N Excesses in Deuterated Organics from Two Interplanetary Dust Particles [#1397] Ion probe isotopic imaging of N in deuterated organics from two IDPs shows that in one case 15N excesses are associated with D excesses, hence with interstellar organics. N isotopes distribution is more complex in the other one.

Marty B.* Matrajt G. Zimmermann L. Engrand C. Duprat J. Nitrogen and Noble Gas Isotopes in Antarctic Micrometeorites [#1578] N, 4He and 40 Ar in Antarctic micrometeorites correlate well, suggesting that they are hosted by silicates, but do not correlate with primordial 3He, 20Ne and 36Ar presumably hosted by organics. This decoupling illustrates loss/degradation of organic material upon delivery on Earth.

16 33rd LPSC Program Ohsumi K. O. * Hagiya K. H. Zolensky M. E. X-Ray Diffraction Study of L2005 AG17 (IDPs) by Using SR [#1478] X -ray diffraction study revealed the existence of magnetite and new type of pyrrohtite with the chemical formula of Fe0.56S in L2005 AG 17. Considering the total chemical formula of Fe0.83S, residual iron in amorphous state might exist in this sample.

Rietmeijer F. J. M.* Thermal Modification of Silicate Materials on Flash-heated Sulfide IDPs: The First Clues for Chemically Controlled, Early Silicate Mineral Evolution [#1079] Variable Ca-compositions of flash heated ferromagnesiosilica materials on massive sulfide IDPs provide the first clues for chemically controlled nucleation of pyroxenes during the earliest stages of silicate mineral evolution in solar nebula dust.

TaylorS.* Alexander C. M. O'D. Delaney J. Ma P. Herzog G. F. Engrand C. Isotopic Fractionation of Fe-57 in Stony Cosmic Spherules: Implications for Iron Loss [#1136] Ion microprobe measurements of 57 Fe in stony cosmic spherules show that evaporative losses of Fe grow large as Fe contents decrease and Ca and Al contents increase. In general, though, mechanical losses of Fe from the spherules are probably bigger.

Toppani A* Libourel G. Experimental Study of Micrometeorite Vesiculation [#1473] We have studied the vesicularity of (1) experimental pulse-heated charges and (2) micrometeorites in order to better constrain the atmospheric entry of micrometeorites.

Genge M. J.* Grady M. M. The Distribution of Asteroids: Evidence from Antarctic Micrometeorites [#1010] The relative abundances of types amongst 550 AMMs are reported. These suggest that C-type asteroids vary from petrologic type 1 to 3.2 and that the majority of S-type asteroids are chondrule-rich.

33rd LPSC Program------17 Tuesday, March 12, 2002 VENUS GEOLOGY AND GEOPHYSICS 8:30 a.m. Salon A

Chairs: L. F. Bleamaster III A. J. Dombard

Lee H.* Morgan J. V. Extracting Topography ofVenusfrom Single Orbit Magellan SAR Data by Using Sub-Aperture Interferometry [#1558] Due to the Magellan spacecraft's elliptical orbit, topography of Venus can be extracted from a single orbit SAR data by using sub-aperture interferometry. Two sub-aperture complex SAR images from a burst give the interferogram sensitivity to height.

Davis A. M. * Ghail R. C. Watt L. High Resolution Digital Elevation Models of Venus [#1665] High resolution (75m) DEMs of Venus have been produced using MST Version 2 and FMAP cycle 1 and 3 data. Refinement of DEM results is discussed and the potential for 3D visualisation.

Cochrane C. G.* Ghail R. C. How Much Sediment Lies on Venus? [#1025] DEMs, made using the Magellan Stereo Toolkit, and F-Map images of 3 craters are analysed to show that their dark features are most probably caused by fine sediment lying in depressions rather than lava.

Basilevsky A. T. * Head J. W. III Venus: Dating Post-Regional-Plains Formations Through Analysis of Preservation of Crater-Associated Radar- Dark Deposits [#1006] The degree of preservation of crater-associated radar-dark deposits is used to estimate the age of the crater and adjacent deposits.

Young D. A.* 'Polygonal' Fabrics on Venus - Polygenetic, Positive and Primary? [#1172] Examples of polygons from the Venus' V25 quadrangle indicate that many are formed by ridges instead of joints; that emplacement-related features control their patterns, and that they can be unit-specific. These complications must be factored into models of polygon formation.

Hansen V. L.* Bleamaster L. F. III Distributed Point Source Volcanism: A Mechanism for 'Regional Plains' Reswfacing, Venus [#1061] 6 2 V23/24 hosts shields that form a thin porous layer across >10 x 10 krn ; variations in thermal gradient/conductivity, radioactive content/distribution, and surface T can result in time transgressive, incipient shallow point-source partial melting.

Byrnes J. M.* Crown D. A. Morphology, Stratigraphy, and Surface Roughness Properties of Venusian Lava Flow Fields [#1411] Analyses of morphologic, stratigraphic, and surface roughness properties of five venusian lava flow fields indicate complex histories, including simple and compound emplacement, tube-fed flows, and flow inflation.

Montesi L. G. J.* Zuber M. T. Revisiting the Origin of Tectonic Spacing on Venus: Importance of Localization and Surface Temperature [#1618] Tectonic length scales on Venus are related to the mechanical structure of the lithosphere. We re-examine which deformation models and thermal structures best explain the observed length scales, using dry diabase rheology.

18 ------33rd LPSC Program Nunes D. C.* Phillips R. J. State of Compensation and Its Control on the Relaxation of Crustal Plateaus on Venus [#1884] Gravitational relaxation models can only reproduce the observed range in shape of crustal plateaus on Venus if the initial state of compensation is a variable, where the initially uncompensated end-member case produces elevated rims.

Bleamaster L. F. III* Hansen V. L. Effects of Crustal Heterogeneity on the Suiface Manifestation of Chasmata; A Study of the Ix Chef, Kuanja, Vir-Ava Chasmata System and Devana Chasma, Venus [#1774] Mechanical heterogeneities, imparted to the crust by crustal plateau formation, influence the morphologies of chasmata by the partitioning of strain and the impedance of diapiric rise.

Johnson C. L.* Richards M.A. A Conceptual Model for the Relationship Between Coronae and Large-Scale Mantle Dynamics on Venus [#1733] We investigate relationships between coronae and large-scale interior dynamics of Venus using the spatial distribution of coronae and recent analog laboratory experiments on plume convection.

Dombard A. J.* Johnson C. L. Richards M.A. SolomonS. C. A Transient Plume Melting Model for Coronae on Venus [#1877] We propose that coronae can result indirectly from transient mantle plumes, via melt created as the plume head impinges on the lithosphere, and we discuss implications of this thermal/melt plume origin for models of the evolution of Venus' mantle.

Starukhina L. V.* Kreslavsky M.A. Radiophysical Properties of Venusian Highlands: Possible Role of Magnetic Effects [#1559] Magnetite is a probable weathering product on Venus. Temperature dependence of natural ferromagnetic resonance in magnetite can be responsible for the observed anomalous radiophysical properties of Venus highlands.

33rd LPSC Program------19 Tuesday, March 12,2002 MARS INFRARED SPECTROSCOPY 8:30 a.m. Salon B

Chairs: M. D. Lane J, F. Mustard

Wyatt M. B.* Bandfield J. L. McSween H. Y. Jr. Christensen P.R. Moersch J. TES Observations of Chryse and Acidalia Planitiae: Multiple Working Hypotheses for Distributions of Surface Compositions [#1554] A gradation of surface units represents either ( 1) an influx of basaltic sediment from southern highlands, deposited on andesitic volcanics, or (2) incompletely weathered basalt marking the geographic extent of submarine alteration of basaltic crust.

Noe Dobrea E. Z.* Bell J. F. III Addressing the Compositional Variability ofAcidalia Planitia Using MGSITES: Constraints on Martian Hydroxide Mineralogy [#1931] We investigate the spectral variability of Acidalia Planitia using MGS/TES. Atmospheric removal is done by constraining our observations to EPFs. Preliminary analysis show variability of the 6-micron feature attributed water/OR-bearing minerals.

Farrand W. H.* Gaddis L. R. Blundell S. Hydrovolcanic Landforms in Acidalia and Cydonia: Pan-Spectral Analysis with MGS MOC, MOLA, and TES [#1820] Landforms resembling tuyas and moberg hills and ridges in Acidalia and Cydonia are examined using MGS MOC, MOLA, and TES data. Using multiple datasets provides additional constraints on the question of whether these landforms are hydrovolcanic in origin.

Minitti M. E.* Lane M. D. Bishop J. L. Oxidized Volcanic Materials as a Potential Explanation for Gray Hematite Regions on Mars [#1674] Martian-analogue basalts synthesized, then oxidized, in the laboratory exhibit gray hematite coatings on exposed glass surfaces. We explore potential connections between these hematite coatings and the coarse, gray hematite signatures seen on Mars.

Lane M.D.* Morris R. V. Hartmann W. K. Christensen P.R. Mertzman S. A. Platy Hematite and Metamorphism on Mars [#2020] Emissivity spectra of Sinus Meridiani, Mars suggest that the hematite consists of platy particles that occur as consolidated, schistose lenses or loose, platy particles. This platy hematite may have originated as a result of burial metamorphism.

Kirkland L. E.* Herr K. C. Adams P.M. Westall F. Salisbury J. W. Spectra of Cemented, Hematite-rich Material and TES Spectra of Sinus Meridiani, Mars [#1218] We seek to extend hematite samples studied past pure end-members to include cemented materials (e.g., coatings) to determine whether they match TES spectra. We will discuss why cemented finely-particulate materials also exhibit spectral contrast consist with TES observations.

Johnson J. R.* Staid M.l. Titus T. N. Shocked Plagioclase Signatures in Thermal Emission Spectrometer Data of Mars [#1345] Deconvolution of TES data using a spectral library that includes spectra of experimentally shocked anorthosite (bytownite) suggests that shocked materials can be identified on Mars at low to intermediate abundances ( 10-20%) over a range of pressures.

20 33rd LPSC Program Milam K. A.* McSween H. Y. Jr. Hamilton V. E. Christensen P.R. Assessing the Accuracy of Deconvolved Plagioclase Compositions from TES Data [#1868] This study examines how zoning may affect modeled plagioclase compositions in thermal emission spectra.

Hamilton V. E.* Christensen P.R. McSween H. Y. Jr. Global Constraints on Martian Meteorite Source Regions: Deconvolutions of MGS TES Data Using SNC Meteorites as End Members [#1937] We have performed a global deconvolution ofTE5.) data using the seven end members ofBandfield et al. [2000] plus six spectra representative of the major classes of martian meteorites and report on global detections of the meteorite end members.

Rogers D.* Christensen P.R. Age Relationship of Basaltic and Andesitic Surface Compositions on Mars Determined from TES Data [#1139] High-resolution studies using TES data show that the TES basaltic surface composition is closely associated with the ancient cratered terrain morphology. Small isolated regions of basalt have also been identified in the northern lowland plains.

Snook K. J.* Properties of Suspended Martian Dust Using MGS-TES Data [#1600] This analysis ofMGS-TES data from the recent global dust storm allows dust optical properties, optical depth, particle size distribution, and surface temperatures to be derived for multiple-scattering atmospheres using radiative transfer methods.

Cooper C. D.* Mustard J. F. New Insights on Mars Low Albedo Region Composition from Joint Analysis of ISM and TES Spectra [#1873] Joint analysis of TES and ISM data provides new insight on the composition of low albedo areas of Mars. Type I material is correlated with pyroxene band strength. Future VIS-NIR instruments can help determine whether Type II material is andesitic.

Mustard J. F.* Cooper C. D. Comparision of ISM Reflectance and TES Emissivity Measurements of Mars [#1979] We compare reflectance spectra acquired by ISM and emissivity spectra acquired byTES to assess the congruence in compositional interpretations, with emphasis on variations in Syrtis Major, dark regions in general, and dark red soils.

33rd LPSC Program------21 Tuesday, March 12, 2002 CRA TERING PROCESSES AND PRODUCTS 8:30 a.m. Salon C

Chairs: O. S. Barnouin-Jha C. W. Poag

Kring D. A.* Comparing the Environmental Consequences of Impact Events During the Archean, Proterozoic, and Phanerozoic [#1511] Ambient conditions at the Earth's surface and in its atmosphere were different during the Archean, Proterozoic, and Phanerozoic, affecting the environmental consequences of large impact events.

Pierazzo E.* Hahmann A. N. Chicxulub and Climate: Investigating the Climate Sensitivity to Stratospheric Injections of Impact-generated S-hearing Gases [#1269] We use an atmospheric single column model coupled to a sulfate aerosol model to provide an initial assessment of climate sensitivity to stratospheric sulfate aerosols produced by the reaction of S-bearing gases released in the Chicxulub impact event.

Poag C. W.* Gohn G. S. Powars D. S. Chesapeake Bay Impact Crater: Seismostratigraphy and Lithostratigraphy of Displaced Sedimentary Megablocks [#1019] Two new deep coreholes into basement in the Chesapeake Bay impact crater confirm that displaced megablocks in the annular trough are dominated by Cretaceous sediments and are detached from the crystalline basement surface by a zone of shock-generated collapse.

Kenkmann T.* Scherler D. New Structural Constraints on the Upheaval Dome Impact Crater [#1037] The gravity collapse of the Upheaval Dome transient crater is analysed with the technique of balanced section construction. Strata thickening/thinning during convergent inward flow obeys a power law function and enables the restoration of shear movements.

Ivanov B. A.* Deep Drilling Results and Numerical Modeling: Puchezh-Katunki Impact Crater, Russia [#1286] The ongoing projects on drilling in impact craters attract the atteption to the deep drill hole (5 km) has been drilled in the central uplift of the 40-km in diameter Puchezh-Katunki impact crater. We present numerical model of the crater formation verified with drill core data.

Holsapple K. A.* Housen K. R. Code Wars: A Comparison of Codes and Models for Impact Calculations [#1857] Results in the literature from code calculations of impacts vary drastically, sometimes by a couple of orders of magnitude. Comparisons of results from different codes, and discussions of the different physical models that contribute to those differences will be presented.

Stbffler D.* Artemieva N. A. Pierazzo E. Modeling the Ries-Steinheim Impact Event and the Formation of the Moldavite Strewn Field [#1871] We have started a numerical modeling project for the Ries-Steinheim-moldavite impact event to better understand the production and distribution of early and late melt ejecta in an oblique impact of a double projectile on a complex target.

22 33rd LPSC Program Artemieva N. A* Ivanov B. A Ejection of Martian Meteorites- Can They Fly? [#1113] Oblique impacts on Mars are studied to estimate ejection of solid particles with escape velocity and their motion through atmosphere. Parameters of an impact, producing martian meteorites, are defined and compared with crater-size distribution for young martian surfaces.

Housen K. R. * Does Gravity Scaling Apply to Impacts on Porous Asteroids? [#1969] Centrifuge impact experiments are used to investigate the effect of gravity in cratering on porous asteroids.

O'Keefe J.D.* Ahrens T. J. Cratering and Instabilities: Implications for Penetration Modes and Ejecta Emplacement [#1880] Calculated the boundaries in the projectile/target density ratio and target vaporization plane for smooth crater formation (classic case), projectile instabilities/breakup and capture, and target instabilities, compaction and suppression of ejecta.

Schultz P. H.* Anderson J. L. B. Reineck J. T. Impact Crater Size and Evolution: Expectations for Deep Impact [#1875] Deep Impact will involve a unique cratering experiment designed to probe below the surface of a comet. Laboratory experiments provide critical data for crater scaling and evolution of the ejecta curtain.

Anderson J. L. B.* Schultz P. H. Reineck J. T. Evolving Flow-Field Centers in Oblique Impacts [#1762] Ejection velocities and angles for vertical impacts are compared to different regions of 30 degree impact curtains using 3D PIV. Ejecta dynamics of the different regions require flow-field centers that change through space and time.

Barnouin-Jha O. S.* Cintala M. J. Crawford D. A. Investigating the Effects of Shock Duration and Grain Size on Ejecta Excavation and Crater Growth [#1738] The purpose of this work is to address how shock thickness relative to target grain size may influence shock decay and thereby ejecta excavation and crater growth.

33rd LPSC Program------23

'. Tuesday, March 12, 2002 CHONDRULES AND EARLY SOLAR SYSTEM PROCESSES 8:30 a.m. Marina Plaza Ballroom

Chairs: B. Zanda S. J, Desch

Scott E. R. D.* What Chondrites Can Tell Us About Accretion in the Solar Nebula [#1453] Chondrite and chondrule properties suggest that chondrite accretion was sporadic and intermittent, that chondrules and clasts of preexisting bodies were crucial, and that mass was lost from the asteroid belt before planetesimals accreted.

Huss G. R.* Meshik A. P. Hohenberg C. M. Smith J. B. Relationships Among Chondrite Groups as Inferred from Presolar-Grain Abundances [#1910] Presolar-grain abundances show that C chondrites consist of two quite distinct groups, those containing "primitive" material, and those consisting of processed material. Ordinary chondrites are intermediate in many properties between these groups.

Palme H.* Is the Depletion of Moderately Volatile Elements in the Inner Solar System Inherited from the Interstellar Medium? [#1709] Although the element pattern of material in the inner solar system bears some resemblance to that in grains of the interstellar medium (ISM), solar system materials have, with few exceptions, no memory of their ISM origin.

Alexander C. M. O'D.* Exploration of a Kinetic Model for Chondrule Formation [#1864] A kinetic model of evaporation/condensation is used to explore whether elemental fractionations are possible during chondrule formation without producing significant isotopic fractionation.

Tachibana S.* Huss G. R. Sulfur Isotope Composition of Putative Primary Troilite in Chondrules [#1685] Sulfur isotope compositions of putative primary troilites in chondrules from Bishunpur were measured by ion probe. These primary troilites have the same S isotope compositions as matrix troilites and th!ls appear to be isotopically unfractionated.

Desch S. J.* Connolly H. C. Jr. Moser D. E. Constraining the Environment in Which Chondrules were Melted by Nebula Shocks [#1768] We review the Desch and Connolly (2002; MAPS 37[2]) numerical simulations, which show that melting of chondrules in shocks is consistent with their petrology. We extend these calculations and constrain the chondrule formation environment.

Xiong Y.-L.* Hewins R. H. Cetiner Z. WoodS. A. Fractionation of B and Li in the Solar Nebula or in Chondrules: Insight from Chondrule Formation Experiments [#1200] Chondrule formation experiments suggest that the B/Li ratios of synthesized chondrules are always lower than that of the starting material, and that the B/Li ratios systematically decrease with decreasing cooling rates at constant temperature.

24 ------33rd LPSC Program Fox G. E. Hewins R. H.* Nebular Condensates, Chondrules and Recycling [#1612] If micron-sized precursors are melted, we get PO textures for a range of initial temperatures only 100°C with coarser. Making typical chondrules from fine-grained condensates is impossible in one event, though recycling experiments produce coarser textures.

Lofgren G. E.* Le L. Experimental Reproduction ofType JB Chondrules [#1746] We have replicated type lB chondrule textures and compositions with crystallization experiments in which UOC material was melted at 1400°C and cooled at 5-l000°C/hr using graphite crucibles in evacuated silica tubes to provide a reducing eiwironment.

Wasson J. T.* Rubin A E. Ubiquitous Relict Grains in Type-ll Chondrules, Narrow Overgrowths, and Chondrule Cooling Rates Following the Last Melting Event [#1141] Low-FeO relict grains are ubiquitous in C03 type-II chondrules. Overgrowths on these grains are 4-10 urn, inconsistent with the growth of large (>30-um) phenocrysts from tiny nuclei. Cooling rates estimated from type-II textures must be reinterpreted.

Hezel D. C.* Brenker F. E. Palme H. Petrology and Cooling History of Cryptocrystalline Chondrules from CH-Chondrites [#1787] We studied cryptocrystalline (CC) chondrules from CH-chondrites using EPMA and TEM technique. Some CC- chondrules must have had pre-existing mineral grains as precursors. The cooling gradients of these chondrules are > l00°C per hour.

Zanda B.* Bourot-Denise M. Hewins R. H. Cohen B. A. Delaney J. S. Humayun M. Campbell A J. Accretion Textures, Iron Evaporation and Re-Condensation in Renazzo Chondrules [#1852] Chondrules in Renazzo show evidence for formation by droplet coalescence in a dust-rich environment. Correlation between textures, major and trace element compositions of silicates and metal indicate extensive Fe evaporation and re-condensation.

Humayun M.* Campbell A. J. Zanda B. Bourot-Denise M. Formation of Renazzo Chondrule Metal Inferred from Siderophile Elements [#1965] Siderophile element abundances of metal from well-defined petrographic contexts in the Renazzo CR2 chondrite are reported, and used to constrain the origin of metal.

33rd LPSC Program------25 Tuesday, March 12, 2002 THE LUNAR REGOLITH: THINK GLOBALLY, ACT LOCALLY 1:30 p.m. Salon A

Chairs: B. L. Jolliff T. H. Prettyman

James C. L. Letsinger S. L. Basu A.* Wentworth S. J. McKay D. S. Size Distribution of Fe0 Globules in Lunar Agglutinitic Glass [#1827] SEM-BSE measurements of the size distribution of Fe0 globules in agglutinitic glass in seven lunar soils average about 120 ± 20 nm, suggesting similar modes of origin.

Taylor L. A.* Morris R. V. Pieters C. M. Patchen A. D. Taylor D-H. Keller L. P. McKay D. S. Moon-wide Evidence that the Fusion-of-the-Finest Fraction- P -Model Really Explains the Chemistry of the Agglutinitic Glass [#1291] Detailed lunar soil characterizations from both the mare and highlands provide the first Moon-wide evidence for the F3 model, by some guy from New Mexico. This paper addresses the major ramifications of these forensic data.

Hashizume K.* Chaussidon M. Marty B. Terada K. Micro-Analyses of Carbon Isotopic Composition in Lunar Soil Samples [#1465] Depth-profiling analyses of the carbon isotopic composition within the 100 nm thick surface layers of lunar soil grains reveal existence of a C-bearing thin film ([C] up to 16wt%) with a 813C value as high as + 120%o. This C component seems to be of a non-solar origin.

Korotev R. L. * The Luna 20 Regolith [#1224] The Luna 20 regolith more mafic, more magnesian, and richer in incompatible elements than typical feldspathic surface crust because it contains material of the lower crust ejected from the Crisium basin.

Jolliff B. L.* Haskin L.A. Gillis J. J. Korotev R. L. Zeigler R. A. Lithologic Diversity in Lunar Regolith: Lessons for Future Lunar Exploration Strategies with Application to South Pole-Aitken Basin [#1156] Diversity of rock fragments in individual regolith samples from Apollo sites and inferred regolith stratigraphy from large craters and basins in the South Pole-Aitken region are used to assess the value of a single-point sample from the SPA basin.

Pieters C. M. * Give and Take Between SPA and Imbrium Basins [#1776] Assessment of lunar global rock types indicates a broad region north of Imbrium is unusally mafic. This noritic zone could be antipodal deposits from SPA, but is more likely deep seated debris from the Imbrium impact forming the northern smooth plains.

Lucey P. G.* Lawrence D. J. Feldman W. C. Elphic R. C. Prettyman T. H. Maurice S. A New Rock Type Found at Tycho [#1056] LP and spectral data suggest that the crater Tycho exposed a new rock type. It is an anorthositic gabbro with 2-4 wt% FeO, a plagioclase to mafic + plag ratio of 65-70, and a mafic mineral assemblage dominated by high-Ca pyroxene with Mg* of 70-80.

Spudis P. D.* Zellner N. E. B. Delano J. W. Whittet D. C. B. Fessler B. Petrologic Mapping of the Moon: A New Approach [#1104] We have used the Ti-(Fe-Ti)-"Al" ternary plot to map the distribution of petrologic units on the Moon based on Clementine images of Fe and Ti content. This new technique allows us to better understand the regional and global history of the Moon.

26 ------33rd LPSC Program Steutel D.* Winter M. E. Lucey P. G. LeMouelic S. Efficient Interpretation of Remote Sensing Data: Aristarchus Plateau [#1328] We applied an extremely efficient endmember detector/linear unmixing algorithm and ·a Hapke-based spectral analysis model to Clementine UVVIS and NIR data resulting in an efficient and effective compositional interpretation of the image spectra.

Prettyman T. H.* Feldman W. C. Lawrence D. J. McKinney G. W. Binder A. B. Elphic R. C. Gasnault O. M. Maurice S. Moore K. R. Library Least Squares Analysis of Lunar Prospector Gamma Ray Spectra [#2012] Using library least squares, we have carried out the first complete analysis of Lunar Prospector gamma ray spectra. Maps of major elemeRts, including O, Si, Ti, AI, Fe, Mg, and Ca, and radioactive elements, including Th, U, and K, have been developed for the whole moon.

Richmond N. C. * Hood L. L. Halekas J. S. Mitchell D. L. Lin R. P. Acuiia.M. H. Binder A. B. Sources of Near Side Lunar Magnetic Anomalies [#1638] Lunar Prospector magnetometer data has been used to identify a number of nearside magnetic anomalies. Some of the features identified appear to correlate with impact ejecta, supporting a basin ejecta origin to the nearside anomalies.

van der Bogert C. H.* Schultz P. H. King Crater Impact Melt Compositions: Possible Impactor Contamination [#1719] The distribution and composition of highland and impact melt units at King Crater suggest that parts of an iron-rich impactor (e.g., OC, iron) survived the impact and contributed to the distinctive downrange melts. Frictional melting and drag during impact enhances such contamination.

Bussey D. B. J.* Robinson M.S. Edwards K. Spudis P. D. Lucey P. G. Feldman W. C. Determination of Permanently Shadowed Terrain in the Lunar Polar Regions [#1819] Modelling of simulated simple crater topography data was conducted in order to investigate how the amount of permanent shadow inside a crater varies as a function of size, latitude, and season.

33rd LPSC Program------27 Tuesday, March 12, 2002 SPECIAL SESSION ODYSSEY "MARS- WE'RE BACK!" 1:30 p.m. Salon B

Chairs: R. S. Saunders J. J. Plaut

Meyer M. A.* [INVITED, 15 minutes] Odyssey Science: - Overall Role Within the Mars Program

Saunders R. S.* Plaut J. J. Meyer M. A [INVITED, 15 minutes] Overview of Odyssey Science- Early Results and Plans

Christensen P.R.* Jakosky B. M. Kieffer H. H. Malin M. McSween H. Y. Jr. Nealson K. Mehall G. Silverman S. Gorelick N. [INVITED, 15 minutes] Initial Results from the 2001 Mars Odyssey Thermal Emission Imaging System (THEMIS) Investigation

Boynton W. V. * Feldman W. C. Mitrofanov I. Trombka J. I. Arnold J. R. Englert P. A J. Metzger A. E. R. Reedy C. Squyres S. W. d'Uston C. Wanke H. Bruckner J. Drake D. M. Evans L. G. Starr R. Shinohara C. Anderson F. S. [INVITED, 15 minutes] Expected Performance and Initial Results from the 200I Mars Odyssey Gamma Ray Spectrometer (GRS) Instrument Suite

Cleghorn T. F.* LeeK. Zeitlin C. J. Cucinotta F. A. Badhwar G. [INVITED, 15 minutes] Initial Results from the 2001 Mars Odyssey Martian Radiation Environment Experiment (MARIE)

Mitrofanov I.* Anfimov D. Aust S. Erasov A Handorin S. Kondabarov A. Kozyrev A. Letunovskii V. Litvak M. Mokroussov M. Sanin A. Tonchev A. Tret'yakov V. Krylov A. Pikil'ner L. Popov Yu. Shvetsov V. Gorn L. Il'in B. Verevkin T. Bobrovnitskii Yu. Tomilina T. San'ko N. Boynton W. Hamara D. Kloss C. Saunders R. S. [INVITED, 15 minutes] Russian High Energy Neutron Detector (HEND ), As Part of the GRS Facility of "2001 Mars Odyssey" Mission

Feldman W. C.* Tokar R. L. Prettyman T. H. Boynton W. V. Moore K. R. Gasnault O. Lawson S. L. Lawrence D. J. Elphic R. C. [INVITED, 15 minutes] Initial Results of the Mars Odyssey Neutron Spectrometer at Mars [#1718] Initial results of the Mars Odyssey Neutron Spectrometer are presented. Although preliminary, the results are consistent with a hydrogen rich terrane poleward of 60 degrees latitude along the satellite trajectory during this pass.

Arvidson R. *[INVITED, 15 minutes] Odyssey Data -Description and Plans for Distribution

Klug S. L. * Christensen P. R. [INVITED, 15 minutes] Opportunities for Involvement in Odyssey- Scientists, Educators, Kids

Bandfield J. L.* Smith M.D. Christensen P.R. [INVITED, 15 minutes] THEMIS Surface-Atmosphere Separation Strategy and Preliminary Results [#1081] Methods refined and adapted from the TES investigation are used to develop a surface-atmosphere separation strategy for THEMIS image analysis and atmospheric temperature and opacity retrievals.

Zurek R. W.* Esposito P. Martin T. Z. Keating G. Tolson R. Dwyer A. Bougher S. Murphy J. Justus C. G. Christensen P.R. Bender K. Smith M. [INVITED, 15 minutes] Structure of the Martian Winter Polar Vortex: The View from Odyssey Aerobraking

28 ------33rd LPSC Program Litvak M. * Anfimov D. Kozyrev A. Mitrofanov I. Sanin A. Boynton W. Hamara D. Saunders R. S. [INVITED, 15 minutes] 3-D Model of Neutron Cloud Around Mars from the HEND Measurements During the Aerobraking Stage of Odyssey Flight

Tokar R. L.* Feldman W. C. Prettyman T. P. Moore K. R. Boynton W. V. Gasnault Lawson S. L. Lawerence D. J. Elphic R. C. [INVITED, 15 minutes] Comparison of Measured Themzal!Epithermal Neutron Flux and Simulation Predictions for the Odyssey Neutron Spectrometer in Orbit About Mars [#1803] This study compares initial data from the Mars Odyssey neutron spectrometer at Mars with simulation predictions for assumed surface compositions. Latest results for Odyssey in the mapping configuration will be presented.

33rd LPSC Program 29 Tuesday, March 12, 2002 PLANETARY FORMATION AND EARLY EVOLUTION 1:30 p.m. Salon C

Chairs: D. Walker C. B. Agee

Chambers J. E.* Cassen P. Planetary Accretion in the Inner Solar System: Dependence on Nebula Surface Density Profile and Giant Planet Eccentricities [#1049] We present 32 N-body simulations of planetary accretion in the inner Solar System, examining the effect of nebula surface density profile and initial eccentricities of Jupiter and Saturn on the compositions and orbits of the inner planets.

Canup R. M.* Asphaug E. Pierazzo E. Melosh H. J. Simulations of Moon-forming Impacts [#1641] We have incorporated a newly upgraded version of the equation of state ANEOS that allows for the formation of molecular vapor into a smoothed-particle hydrodynamics code. Results of simulations of Moon-forming impacts with this new EOS are presented.

Moister F. J.* Bradley J.P. Sitko M. L. The Origin of the Crystalline Silicates in our Solar System [#1471] Based on astronomical observations of circumstellar dust, we discuss the formation of crystalline silicates in our Solar System. Most silicate crystals are formed in situ. However, the relict forsterite grains are expected to have a presolar origin.

Drake M. J.* Righter K. What is the Earth Made Of? [#1239] Measurements made on materials from Earth, Mars, comets, and meteorites of Mg/Si, Al/Si, oxygen, Os, D/H, Ar/H20, and Kr/Xe ratios, all lead to the conclusion that no primitive material similar to Earth mantle material is currently represented in our meteorite collections.

Yin Q. Z.* Jacobsen S. B. Yamashita K. Blichert-Toft J. Telouk P. Albarede F. New Hf- W Data that are Consistent with Mn-Cr Chronology: Implications for Early Solar System Evolution [#1700] The new Hf-W data is consistent with Mn-Cr chronology. The Earth core formation timescale is less than 29Ma since the beginning of the solar system.

Nagahara H.* Ozawa K. Time Scale of Accretion and Core Formation of the Earth: The Role of Reduction Reaction and Metal Separation [#1596] The role of reduction and metal separation rate on the evolution of core and BSE Hf-W isotopic composition was 182 investigated. Long reduction and separation times satisfy the observed Hf/W and £ W of BSE even if accretion time is short. van Westrenen W.* Rama Murthy V. Fei Y. Potassium in Planetary Cores? An Experimental Study of Potassium Partitioning Between Metal and Silicate Liquids [#1524] We present results of an experimental high-pressure, high-temperature study into the partitioning behaviour of potassium between metal and silicate liquids, with possible implications for radioactive decay of K as an energy source in planetary cores.

30 ------33rd LPSC Program Gilpin L.* Draper D. Chabot N. Schwandt C. Agee C. B. Metal and Silicate Melt Mobility in Garnet-rich Solid Matrices: Implications for Martian Differentiation [#1140] Determining whether melts can form interconnected networks within solid matrices can tell us about core formation and magma generation. This study looks at varying melt compositions in garnet matrices for its significance in Martian pifferentiation.

Jones J. H.* Neal C. R. Ely J. C. Comparative Planetology of the Highly Siderophile Elements: Implications for the Accretion of the Terrestrial Planets [#1194] Of the highly siderophile elements, Pt fractionates least during igneous processess. Currently, Pt abundances in the Earth, Moon, and Mars are indistinguishable. This constancy casts doubt on the late veneer model of planetary accretion.

Cottrell E. A.* Walker D. A New Look at Pt Solubility in Silicate Liquid [#1274] Pt nuggets found in the silicate glass of solubility experiments at low f02 may be the quench products of Pt in solution in silicate liquid, not mechanical contaminants. If so, the perception of "excess" Pt in Earth's mantle disappears.

Chabot N. L.* Agee C. B. The Behavior of Nickel and Cobalt During Core Formation [ #1 009] Recent studies have proposed a variety of conditions for an early, deep magma ocean to account for the Ni and Co depletions in the Earth's mantle. We present new Ni and Co experimental data to better constrain core formation conditions in the Earth.

Walker D.* Coordination Number Effects in Phase Changes [#1313] Phase changes that increase coordination number produce weaker high-pressure, high-density structures. Thermal expansion jumps stimulate convection of parcels falling through phase changes to higher coordination number.

Meibom A.* Frei R. An Ancient, Highly Radiogenic Os Isotope Reservoir in Earth [#1304] Mantle-derived iridosrnine grains put firm constraints on the Os isotope evolution of the outer core, which could be much more radiogenic than previously thought.

33rd LPSC Program------31 Tuesday, March 12, 2002 CARBONACEOUS CHONDRITES: PRIMITIVE TO PROCESSED 1:30 p.m. Marina Plaza Ballroom

Chairs: D. S. Lauretta A. J. Brearley

Weisberg M. K.* Boesenberg J. S. Ebel D. S. Gujba and Origin of the Bencubbin-like (CB) Chondrites [#1551] Gujba is a new Bencubbin-like (CB) chondrite that provides new clues to the origin of metal-rich CB chondrites. It contains many metal and silicate chondrules that are complete spheres and a CAl, like in other chondrites, suggesting a primitive origin.

Campbell A. J. * Humayun M. Siderophile Element Distributions in the Metal-rich Chondrite GRO 9555I [#1842] Individual metal grain compositions in GRO 95551 have been measured by LA-ICP-MS. The data indicate kamacite/taenite equilibration at approximately 1020 K. The mean metal composition is different from that of Bencubbin-like meteorites.

Mostefaoui S. * El Goresy A Hoppe P. Gillet Ph. Ott U. Nitrogen-Isotopic Compositions of In-Situ Diamonds and Graphitic Carbon Grains in the Bencubbin Meteorite: A NanoSIMS Study [#1487] We report Raman and N isotopic studies of in-situ diamonds and graphitic phases in Bencubbin. Our finding of two N isotopic reservoirs raises a number of questions about the origin of diamond and evolution of theN isotopic anomaly in this meteorite.

Brearley A J. * Heterogeneous Distribution of Carbonaceous Material in Murchison Matrix: In Situ Observations Using Energy Filtered Transmission Electron Microscopy [#1388] Energy filtered TEM has been used to study the location of carbonaceous material in situ in Murchison matrix. Carbon occurs frequently as narrow rims around sulfide grains, but is rare in regions of matrix that are dominated by ph y llosilicates.

Abreu N. M. * Brearley A J. Mineralogical Characterization ofVigarano Matrix: HRTEM and EFTEM Observations [#1542] HRTEM and EFTEM have been used to study Vigarano matrix. Fine-grained rim olivines commonly contain inclusions of amorphous carbon and a Ca-Al-rich phase, whereas olivines in the clastic matrix contain rare inclusions of poorly graphitized carbon.

Morlok A* Floss C. Zinner E. K. Bischoff A Henkel T. Rost D. Stephan T. Jessberger E. K. Trace Elements in Cl Chondrites: A Heterogeneous Distribution [#1260] Trace element analyses of mineral grains in CI chondrites show strong emichment of REE in heterogeneously distributed phosphates, while sulfates and matrix material have REE abundances close or below the solar system abundance.

Tonui E. K.* Zolensky M. E. Hiroi T. Wang M-S. Lipschutz M. E. Petrographic, Chemical and Spectroscopic Data on Thermally Metamorphosed Carbonaceous Chondrites [#1288] First comprehensive description of aqueous alteration and thermal metamorphism in carbonaceous chondrites. Petrographic evidence has been checked against labile trace element temperatures. Spectroscopic data reveals the level of dehydration and possible relationship to primitive asteroids.

32 ------33rd LPSC Program Lauretta D. S.* Klaue B. Blum J.D. Thermal Analysis of Volatile Trace Elements in Carbonaceous and Ordinary Chondrites [#1602] The thermal release profiles of S, As, Se, Sb, Te, Cd, and Hg have been determined for CI, CO, LL, L, and H chondrites.

Farquhar J.* Benedix G. Airieau S. Leshin L. Thiemens M. H. Jackson T. L. Initial Water Compositions: Aqueous Alteration of Planetesimals [#1850] Oxygen isotope data for sulfate and carbonate rninl!rals (alteration products) point to an initial water-ice oxygen isotope composition closer to that proposed by Clayton and Mayeda than to that of Young. The implication being that water-ice does not lie on an extension of the slope 1 CCAM line.

Pizzarello S.* The Chiral Amines of the Murchison Meteorite: A Preliminary Characterization [#1233] An investigation of the chiral distribution of Murchison amines has found sec-butyl amine with an L-enantiomeric excess of- 18%.

Derenne S.* Robert F. Binet L. Gourier D. Rouzaud J.-N. Largeau C. Use of Combined Spectroscopic and Microscopic Tools for Deciphering the Chemical Structure and Origin of the Insoluble Organic Matter in the Orgueil and Murchison Meteorites [#1182] This work shows the use of various spectroscopies, XANES, solid state NMR, EPR, ENDOR and high resolution transmission microscopy for deciphering the chemical structure and origin of the insoluble organic matter in Orgueil and Murchison.

Cody G. D.* Alexander C. M. O'D. Tera F. Comparison of the Complex Organic Functionality of the Tagish Lake and Murchison Meteorites [#1806] The functional group distribution of the Tagish Lake meteorite organic solid is characterized with solid state 13C NMR.It is observed that the Tagish contains a broad range of other organic functionality. The Tagish Lake data are compared with Murchison data.

Clemett S. J. * MessengerS. Thomas-Keprta K. L. Wentworth S. J. Robinson G. A. McKay D. S. Spatially Resolved Analysis of Amines Using a Fluorescence Molecular Probe: Molecular Avalysis of IDPs [#1898] Some Interplanetary Dust Particles (IDPs) have large isotope anomalies in Hand N. To address the nature of the carrier phase, we are developing a procedure to spatially resolve the distribution of organic species on IDP thin sections utilizing fluorescent molecular probes.

33rd LPSC Program------33 Tuesday, March 12, 2002 POSTER SESSION I 7:00-9:30 p.m. Gymnasium

Carbonaceous Chondrites

Greenwood R. C. Franchi I. A. Fillinger C. T. Oxygen Isotopes in C03 Chondrites [#1609] Oxygen isotope analyses were undertaken on seven C03 chondrites. No correlation was seen between metamorphic grade in C03s and oxygen isotopic compositions. Results suggest that ALH77307 should be reclassified as a unique chondrite.

Kunihiro T. Nagashima K. Yurimoto H. Distribution of Oxygen Isotopes in Matrix from the Vigarano CV3 Meteorite [#1549] We tried to obtain the distribution of oxygen isotopes in matrix using an isotope mapping technique. Oxygen isotope mapping of Vigarano matrix directly shows oxygen isotopes are distributed heterogeneously in matrix.

Wetteland C. Brearley A. J. Petrographic Studies of Sulfide Assemblages in the Allende CV3 Carbonaceous Chondrite [#1837] Studies of sulfides in Allende show that pyrrhotite occurs mainly within chondrules and has been partially replaced by pentlandite. Ni and Co contents of pentlandites within individual chondrules are homogeneous, but are variable between chondrules.

Jones R. H. Carey R. Leshin L.A. Guan Y. Forsterite from Chondrules in the Mokoia ( CV3) Chondrite: Cathodoluminescence, Chemistry and Oxygen Isotopes [#1604] Forsterite in Mokoia chondrules shows CL zoning which can be quite complex. Oxygen isotope analyses in forsterite with different CL intensities are homogeneous, showing that "refractory" and melt-grown forsterites are isotopically indistinguishable.

Greshake A. Krot A. N. Keil K. Fine-grained Dust Rims in the Tagish Lake Carbonaceous Chondrite [#1751] Our studies of fine-grained dust rims in the Tagish Lake meteorite suggest that Ca was lost from the rimmed chondrules and preferentially precipitated as Ca-carbonates in the meteorite matrix and not in the rims. Clusters of framboidal magnetite in the rim also indicate in situ alteration. lvanova M.A. Taylor L.A. Clayton R.N. Mayeda T. K. Nazarov M.A. Brandstaetter F. Kurat G. Dhofar 225 vs. the CM Clan: Metamorphosed or New Type of Carbonaceous Chondrite? [#1437] Dhofar 225 is an anomalous carbonaceous chondrite. It demonstrates some characteristics of CM chondrites and also has some similarities to metamorphosed carbonaceous chondrites. Dhofar 225 probably has been affected by moderate or low heating.

Vel bel M. A. Tonui E. K. Zolensky M. E. Compositions of Partly Altered Silicates and Replacement Serpentine in Nagoya and Allan Hills 81002 ( CM2 ): Implications for Scales of Elemental Redistribution During Aqueous Alteration [#1336] Compositional relations between reactant olivines and replacement serpentines in Nogoya favor homogeneity of aqueous solutions on >cm-dm scales, and alteration after assembly of the meteoroid parent and major episodes of brecciation and mixing.

Chizmadia L. J. Brearley A. J. Petrographic Study ofChondule Mesostasis in the Yamato 791198 CM Carbonaceous Chondrite and Comparison to ALH 81002 [#2059] Chondrule mesostasis compositional data was collected from two thin sections ofY-791198. They were found to be extremely similar. Type IIA chondrules in both sections have mesostasis serpentines which are much higher in Fe than type lA chondrules.

34 ------33rd LPSC Program Zega T. J. Garvie L.A. J. Buseck P. R. Nanometer-scale Measurements of Ferrous-Ferric Ratios in Chondritic Cronstedtite [#2021] We have determined the ferrous-ferric ratio in chondritic cronstedtite at the nanometer scale using electron energy-loss spectroscopy and transmission electron microscopy.

Boctor N. Z. Kurat G. Alexander C. M. O'D. Prewitt C. T. Sulfide Mineral Assemblages in Boriskino CM Chondrite [#1534] Two sulfide mineral assemblages are found in Boriskino CM chondrite. One formed in the solar nebula, and the other on the parent body of CM chondrite.

Hua X. Sharp T. G. Melt and Polymineralic Inclusions in Chondrule Silicates from QUE99038 CM2 Carbonaceous Chondrites: Witness of Chondrule Formation in the Early Solar System [#2006] Polymineralic inclusions in the QUE99038 CM2 are similar to those in CV3 chondrites. These inclusions represent material trapped in chondrules during formation and therefore provide insight into chondrule formation processes and conditions.

Bourot-Denise M. Zanda B. Javoy M. Tafassasset: An Equilibrated CR Chondrite [#1611] Based on textural, compositional and isotopic evidence, the newly discovered chondrite Tafassasset is the first metamorphosed CR known.

Organic Material in Meteorites

Cooper G. Thiemens M. H. Asiyo C. Jackson T. Turk K. Isotopic Analyses of Sugar Derivatives in Carbonaceous Meteorites [#2070] The isotopic analyses of sugar related compounds from carbonaceous meteorites are described.

Pearson V. K. Kearsley A. T. Sephton M.A. Gilmour I. Organic-Inorganic Spatial Relationships in Carbonaceous Chondrites [#1311] The use of a novel technique to determine the spatial relationships of organic and aqueously p(oduced inorganic phases in carbonaceous chondrites, in order to support proposals of a genetic link between the two.

Botta O. Bada J. L. Amino Acids in the Antarctic CM Meteorite LEW 90500 [#1391] The amino acid composition of the Antarctic CM meteorite LEW90500 was determined and compared to that of the CMs Murchison and Murray. The compositional similarity suggest that these meteorites probably originated from the same parent body.

Pearson V. K. Sephton M. A. Gilmour I. Organic Indicators ofAlteration in the CR Chondrites [#1670] A study of the organic components in the CR chondrite macromolecule in order to assess the role of pre-terrestrial alteration on the organic inventory.

Pizzarello S. Catalytic Syntheses ofAmino Acids: Significance for Nebular and Planetary Chemistry [#1236] Amino acids have been obtained efficiently by Fisher-Tropsch type syntheses with various catalytic substrates.

33rd LPSC Program------35 Chondrites

McBride K. M. Statistical Comparisons ofAntarctic Meteorites and Falls [#1323] This study employs statistical data from the ANSMET program and the extensive British Museum meteorite catalogue.

Rochette P. Sagnotti L. Chevrier V. Consolmagno G. Denise M. Falco L. Osete M. Pesonen L. Magnetic Classification of Meteorites and Asteroid Probing [#1117] A magnetic susceptibility database on more than 1000 different meteorites from various european collections has been assembled. Each group is characterised by a narrow range of value, demonstrating the interest of in-situ asteroid measurements.

Robert F. Deloule E. Using the DIH Ratio to Estimate the Terrestrial Water Contamination in Chondrites [#1299] Detailed experiments using water labelled in deuterium to quantify the terrestrial water contamination on extraterrestrial samples. At water concentration ranging between 0.2 and 0.6 wt. %, the relative fraction of terrestrial water in the Semarkona meteorite, never exceeds 20%.

Murty S. V. S. Mahajan R. R. Nitrogen and Noble Gases in Zag (H3-6) Regolith Breccia [#1023] Nitrogen and noble gases are reported in light and medium gray samples of Zag meteorite. Though total N in both samples has same 815N (13.5%o), the 600°C fraction of the gray sample, which is prbably enritched in gases released from halite shows a much lower value of l.7%o.

Rushmer T. Zanda B. Bourot-Denise M. Experimental Deformation of Ordinary Chondrite Under Partially Molten Conditions: Applications to Natural Samples and Implications for Early Differentiation Processes [#1706] Deformation-enhanced separation of silicate from liquid metal may account for the textures and compositions of acapulcoites and lodranites which are likely to have formed from precursor chondritic material.

Buchanan P. C. Reimold W. U. Koeberl C. Melt Veins in the Jackalsfontein L6 Meteorite from South Africa [#1073] The South African L6 chondrite Jackalsfontein contains enigmatic melt veins. The textures of these veins suggest formation associated with local cataclastic processes~

Herd R. K. Hunt P. A Venance K: E. Amelin Y. Rotenberg E. Textural, Mineralogical and Isotopic Age Studies on an Unnamed VLL3 Chondritefrom Antarctica [#1957] Iron-rich and iron-poor chondrules have been identified in an unnamed L/LL3 Antarctic meteorite. Variable equilibration and olivine CaO and FeO values are consistent with petrologic grade 3.5-3.6. U-Pb and Rb-Sr data suggest a secondary event 100-200 Ma after accretion.

Nettles J. W. Lofgren G. E. McSween H. Y. Jr. Recycled "Chondroids" in LEW86018: A Petrographic Study ofChondrule Precursors [#1752] Chondroids are any kind of nebular particle that would melt to become chondrules. We describe the petrography and basic chemistry of chondroids in LEW86018 (L3.1).

Strait M. M. Consolmagno G. J. Microcrack Porosity in the VLLMeteorite Knyahinya: How Homogeneous? [#1711] Image analysis measurements on SEM backscatter images of the L/LL Knyahinya show a narrow range of porosities across the entire thin section, confirming earlier conclusions about porosity in thin section using only a few images.

36 ------33rd LPSC Program Vogel N. Baur H. Bischoff A. Wieler R. Remnants of Solar-like Noble Gases in Chondrules of Unequilibrated Ordinary Chondrites? [#1312] We measured Ne and Ar in chondrules and matrix of primitive chondrites. Some chondrules contain trapped Ne and Ar with low 36ArP0Netr pointing to an HL-rich precursor, or, more probably, to remnants of solar-like noble gases entrapped in the liquid chondrules during their formation near the sun.

Menzies O. N. Bland P. A. Cressey G. Berry F. J. A Quantitative Modal Mineralogy Study of Ordinary Chondrites Using X-Ray Diffraction and Mossbauer Spectroscopy [#1500] X-ray diffraction and Mossbauer spectroscopy are combined to provide a preliminary quantification of the modal mineralogy of 6 unequilibrated and 3 equilibrated ordinary chondrites. The study also investigates changing mineralogy with equilibration.

Quirico E. Raynal P-I. Bourot-Denise M. A Study of the Degree of Structural Order of Carbonaceous Matter in the Matrix of Unequilibrated Ordinary Chondrites [#1120] The structural order ofUOCs carbonaceous matter has been studied by Raman spectroscopy. We show it is correlated to the metamorphism rank. Unlike chondrules and CAis, the matrix material never experienced huge heating effects in the solar nebula.

Welten K. C. Nishiizumi K. Caffee M. W. Masarik J. Leya I. Wieler R. Cosmogenic Nuclides in Metal and Stone Separates of an Antarctic L5/LL5 Chondrite Shower with a Large Pre-Atmospheric Size: QUE 9020I [#1763] Based on cosmogenic radionuclides in stone and metal fractions, we identified six members of a large Antarctic L5/LL5 chondrite shower. The radionuclides suggest a pre-atmospheric radius of 100-200 em and a cosmic-ray exposure age of at least 5 Myr.

Pushing Technical Frontiers (Meteorites and IDPs)

Zieg M. J. Lofgren G. E. Experimental Determination of Olivine Growth Rates in Chondrules [#1373] Crystal growth rates can be calculated from textures of chondrule simulation experiments using the population balance equation. The reproducibility of textures in duplicate experiments and in subsamples of a parent population justifies this method.

Hicks T. L. Taylor G. J. Fagan T. J. Krot A. N. Keil K. Automated Mapping of Meteorite Thin Sections Using Image Processing Software [#1055] Integrating X-ray element maps with visualization software can produce mineral maps of thin sections. The high density of counts obtained is valuable for estimating concentrations of minerals that are fine-grained and occur in minor abundance.

Phelps A. W. Interstellar Diamond Analog Characterization [#2067] TEM analysis of synthetic diamond analogs prepared via chemical vapor deposition.

Iron Meteorites and Pallasites

Ponganis K. V. Marti K. Nitrogen Isotopic Signatures in Non-Magmatic Iron Meteorites [#1133] We have identified two distinct nitrogen isotopic signatures for major components in lAB and IIICD irons and large-scale disequilibria, which may suggest distinct components from parent objects and impactors.

33rd LPSC Program------37 Sisterson J. M. Jones D. T. L. Brooks F. D. Buffler A. Allie M.S. Herbert M.S. Nchodu M. R. Makupula S. Ullmann J. Reedy R. C. Revised Calculations of the Production Rates for Co Isotopes in Meteorites Using New Cross Sections for Neutron-induced Reactions [#1541] New cross section measurements for reactions induced by neutrons with energies >70 MeV are used to calculate the production rates for cobalt isotopes in meteorites and these new calculations are compared to previous estimates.

Hongsresawat S. Chabot N. L. Jones J. H. Modeling the Solidification of Magmatic Iron Meteorites Using Experimental Cu Partitioning [#1337] We attemp to model the solidification of groups IIIAB and IVA magmatic iron meteorites using fractional crystallization. We obtain two parameterizations D(Cu), and D(Ni) as function of S concentrations from experiments, and model trends for Cu vs Ni.

Minowa H. Ebihara M. Rare Earth Elements in Pallasite Olivines [#1386] We determined REE in olivines isolated from six pallasites. Based on these data, we discuss how the REE abundance in pallasite olivines is explained in relation with the formation of pallasites.

Nehru C. E. Chromites in Pallasites [#1948] FFM and CRAL ratios of chromites from pallasites are used as petrogenetic indicators.

Lunar Regional Remote Sensing

Petro N. E. Pieters C. M. The Size and Location of the Transient Crater of the South Pole-Aitken Basin [#1848] The transient crater of the South Pole-Aitken Basin is bounded by exposures of upper crustal material within the basin that define a ring approximately 1,260km in diameter centered at -56°, 170°E.

Jolliff B. L. Gillis J. J. Haskin L. A. Eastern Basin Terrane and South Pole-Aitken Basin Ejecta: Mid-Level Crust? [#1157] The relatively mafic annulus of material surrounding South Pole-Aitken basin and highland deposits around Crisium and other eastern nearside regions are broadly similar and indicate mid-crustal compositions of 6-7 wt.% FeO and -1 ppm or less Th.

Peterson C. A. Hawke B. R. Blewett D. T. Bussey D. B. J. Lucey P. G. Taylor G. J. Spudis P. D. Geochemical Units on the Moon: The Role of South Pole-Aitken Basin [#1601] South Pole-Aitken basin strongly influenced the development of geochemical units on a large area of the Moon.

Gasnault O. Wieczorek M. A Feldman W. C. Absence of Mantle Outcrop at the Lunar Surface [#1992] We investigated iron versus average atomic mass on the Moon. This study allowed us to make the distinction between surface and mantle materials. Lunar Prospector data does not reveal any mantle outcrop.

Zeigler R. A. Korotev R. L. Jolliff B. L. Haskin L.A. Two New Evolved Gabbroic Samples from Apollo 16 [#2038] We have found petrographic and geochemical data for two evolved monornict mafic rocks collected at the Apollo 16 site. While they somewhat resemble sodic ferro gabbro, they may be fragments of the Th-rich plutonic rocks thought to underlie the PKT.

38 33rd LPSC Program Gillis J. J. Jolliff B. L. Lawrence D. J. Lawson S. L. Prettyman T. H. The Compton-Belkovich Region of the Moon: Remotely Sensed Observations and Lunar Sample Association [#1967] Clementine (UVVIS, FeO, and LWIR) data, and Lunar Prospector gamma-ray data forTh are compared with compositional data from lunar samples to show evidence of an association between the Compton-Belkovich high-Th anomaly and alkali anorthosites.

Wagner R. J. Head J. W. III WolfU. Neukum G. Stratigraphic Sequence and Ages in the Gruithuisen Region of tire Moon [#1619] Volcanic domes and related units in the Gruithuisen region of the Moon were dated with impact crater statistics and an impact cratering chronology model.

Byrne C. J. Automated Cosmetic Improvement of Mosaics from the Lunar Orbiter Atlas [#1099] Lunar Orbiter images are improved by a program that mimimizes the bright lines between framelets and streaking, sometimes called the "venetian blind" effect. The program runs automatically on a PC using Windows.

Rosiek M. R. Kirk R. Howington-Kraus E. Color-coded Topography and Shaded Relief Maps of the Lunar Hemispheres [#1792] A new set of U.S. Geological Survey 1:10 million scale lunar maps combines color-coded topography with shaded relief data and nomenclature. Topographic data are from the Clementine laser altimeter and photogrammetric data collected from Clementine images.

Cook A. C. Spudis P. D. Robinson M.S. Watters T. R. Lunar Topography and Basins Mapped Using a Clementine Stereo Digital Elevation Model [#1281] "Planet-wide" (1 km/pixel and 5 km/pixel) Digital Elevation Models of the Moon have been produced using Clementine UVVIS stereo. Six new basins have been discovered, 2 suspected basins have been confirmed, and the . dimensions of existing basins better defined.

Demura H. Hirata N. Haruyama J. Matsui K. Kato M. SELENE Data Processing Working Group Moon Database of SELENE Data Products for Integration Science [#1513] SELENE will be launched in 2005. This goal is to clarify the origin and evolution of the Moon through global mapping. Our project team will open the data with initial reports. We show an overview of the database.

Hirata N. Haruyama J. Demura H. LISM Working Group Data Processing Plan of Lunar Imager/Spectrometer on the SELENE Project [#1493] Designing of a ground data processing system for the Lunar Imager/ Spectrometer (LISM) data is started simultaneously with the LISM hardware development. This paper shows a data processing plan and data products ofLISM.

Ohtake M. Demura H. Sugihara T. Takeda H. LISM Group Ability of the Multiband Imager for the SELENE Mission and Study of Meteorites for the Data Interpretation [#1528] MI is a high-resolution multiband imaging camera being developed for the SELENE project that will be launched in 2005. We measured reflectance spectra and chemical composition of bearing minerals of two meteorites for the MI data interpretation.

Hendrix A. R. The Lunar Phase Curve in the Near Ultraviolet [#1996] We present the ultraviolet phase curve of the Moon at two wavelengths, 215 and 237 nm, as measured by the Ultraviolet Spectrometer on board the Student Nitric Oxide Explorer.

33rd LPSC Program------39 Saiki K. Tsuboi N. Takeda H. Development of a Compact Telescopic Spectral Reflectance Measurement System for the Moon [#1448] We developed a compact multi-band telescope system and succeeded in making FeO and Ti02 chemical distribution maps of the near side of the moon. For the higher accuracy of the chemical distribution map, a field integrating sphere is also developed.

Lunar Geophysics: The Inside Story

Scott R. S. Wilson L. The Stress State of a Growing Lunar Crust: Implications of the Cooling of a Magma Ocean [#1192] We address the early thermo-mechanical evolution of a lunar crust forming from a magma ocean to assess conditions under which early volcanism may have occurred. Potentially large compressive stresses may have been temporally and spatially common.

Khan A. Mosegaard K. Further Constraints on the Deep Lunar Structure Using the Love Number [#1550] We have further tried to constrain the deep lunar structure and state of the lunar central region using the Love number, in addition to spheroidal free oscillations, mass and moment of inertia.

Williams J. G. Boggs D. H. Ratcliff J. T. Dickey J. O. Lunar Love Numbers and the Deep Lunar Interior [#2033] Observationally determined values of the Love number k2 are larger than existing models of the lunar interior predict. The region between the deep moonquakes and core may be a low velocity zone from a partial melt.

Frey S. Halekas J. S. Mitchell D. L. Lin R. P. Cluster Analysis of Lunar Magnetism, Gravity Anomalies, and Topology [#2048] We analyse lunar magnetism, gravity, and topology using the multivariate statistical method of cluster analysis.

Halekas J. S. Mitchell D. L. Lin R. P. Frey S. Hood L. L. Acuna M. H. Binder A. Magnetic Properties of Lunar Geologic Terranes: New Statistical Results [#1368] We use global magnetic field data and digitized geologic maps to determine the magnetic properties of lunar terranes. Average fields vary by a factor of -100 from demagnetized impact basins and craters to strongly magnetized antipodal regions.

Rolin I. V. Was It Necessary to Place Reflectors on Moon to Measure Librations? [#1393] Opportunities are considered to measure Moon's physicallibrations precisely by Earth-based radar facilities.

Lunar Regolith: Scratching the Surface

Lawson S. L. Feldman W. C. Lawrence D. J. Moore K. R. Maurice S. Behan R. D. Binder A. B. Maps of Lunar Radon-222 and Polonium-210 [#1835] The LP Alpha Particle Spectrometer radon-222 map indicates that radon gas is presently emanating from the vicinity of craters Aristarchus and Kepler. The polonium-210 map indicates a variability in time and space of lunar gas release events.

Starukhina L. V. Computer Simulation of Sputtering of Lunar Regolith by Solar Wind: Implication to Surface Chemical Alteration and to Hydrogen Flux in Polar Regions [#1237] Selective escape of sputtered atoms from the Moon gravity may provide the observed excess Fe metal in lunar soils. Flux of backscattered and sputtered solar wind protons near the lunar poles is much less than proton flux from the Earth magnetotail.

40 33rd LPSC Program ReedyR. C. Recent Solar Energetic Particles: Updates and Trends [#1938] The event-integrated fluences of solar protons >10 to >100 MeV were determined for 21 events since 1996. The Sun has been very active starting in July 2000. Trends in these data and possible trends in future solar particle events are discussed.

Heber V. S. Baur H. Wieler R. Isotopic Composition of Solar He and Ne in Lunar Samples Derived by High Resolution Stepwise Etching: Implications for the Constancy of Solar Wind Composition over Time [#1491] Our data suggest that the correlation of the He isotopic composition with solar wind antiquity is an artefact reflecting more likely alteration processes in the lunar regolith than temporal changes in the solar wind composition.

Clark P. E. Drake D. Reedy R. Lunar Neutron Flux as a Function ofTypical Rock Composition [#1735] The influence of rare earth elements in determining lunar thermal neutron production and thus in the generation of secondary gamma-rays, an issue of some concern, appears to be minimal at the abundances found in this wide range of lunar materials.

Genetay I. Maurice S. Gasnault O. d'Uston C. Feldman W. C. Lawrence D. J. Elemental Composition from Simulated Neutron Spectra [#1867] For generalizing Lunar Prospector findings, we search for systematic signatures of major elements within simulated neutron flux spectra between 0 and lOMeV.

Yakshinskiy B. V. Madey T. E. Electron- and Photon-stimulated Desorption of Na from Lunar Basalt Surface [#1557] We have measured Na desorption from a lunar sample under electron and photon irradiation. Evidence for the role of photon-stimulated desorption as a source of Na in the tenuous lunar atmosphere is shown, and is consistent with

previous data for model Si02 surfaces.

Stankevich D. G. Shkuratov Yu. G. Pieters C. M. Taylor L.A. Statistical Analyses of Mare Soil Chemistry Using Clementine Band Constraints [#1916] PCA analysis of LSCC mare soils is performed with data transformed to Clementine bandpasses.

Pieters C. M. Taylor L. The Perplexing Role ofTi02 in the Evolution of Lunar Soils [#1886] Why does Ti02 avoid entering agglutinates?

De Maria G. Brunetti B. Trionfetti G. Ferro D. Kinetic of Interaction Between H2, CH4, NH3 and Ilmenite at High Temperature [#1625] We have investigated the reaction from ilmenite and Hz, CH4 or NH3 in a sound assisted-fluidized bed system installed in a solar furnace. The reduction with CH4 and NH3 could be utilized both for bringing on the moon C and N2 and to extract Oz.

Haskin L. A. Korotev R. L. Gillis J. J. Jolliff B. L. Stratigraphies ofApollo and Luna Highland Landing Sites and Provenances of Materials from the Perspective of Basin Impact Ejecta Modeling [#1364] What are the provenances of the non-mare materials collected at the Apollo and Luna sampling sites? Results from basin ejecta modeling suggest that much of it came from distant basins.

Korotev R. L. Zeigler R. A. Jolliff B. L. Haskin L. A. Lithologies of the Apollo 12 Regolith [#1395] Lithic fragments from the Apollo 12 regolith consist of mare basalts, KREEP impact-melt breccias and glass, alkali anorthosites, felsites, troctolites, and rare material of the feldspathic highlands.

33rd LPSC Program------41 Taylor L.A. Patchen A. D. Cahill J. P. Pieters C. M. Morris R. V. Keller L. P. McKay D. S. Mineral and Glass Characterization of Apollo I4 Soils [#1302] Space weathering effects during lunar soil formation form the basis for our understanding of spectral reflectance from all airless bodies. Presented here are the first modal data on the fine fractions of highland soils, albeit those from Apollo 14.

NobleS. K. Pieters C. M. Keller L. P. Can Space Weathering Survive Lithification? Results of a TEM Study of Lunar Regolith Breccia I 0068 [#1334] Vapor/sputter deposited nanophase iron-rich rims can be preserved intact through lithification processes, implying that if such rims are created on asteroids they may be preserved in regolith breccia meteorites.

Lunar Impacts and Meteorites

Gerasimov M. V. Dikov Yu. P. Yakovlev O. I. Safonova E. N. Wlotzka F. Simulation of a Cometary Impact into Lunar Basalts: Chemical Consequences [#1276] Experimental simulation of an impact of a comet into lunar basalt shows the formation of a volatile rich condensate layer similar to that attributed to fumarolic eruptions. The condensation is accompanied by significant redox processes.

Terada K. Saiki T. Hidaka H. Hasizume K. SanoY. In-Situ Ion Microprobe U-Pb Dating of Glass Spherules from Apollo I7 Luna Soils [#1481] We present results of in-situ analyses of U-Pb dating of 12 glass spherule from Apollo 17 lunar soil samples, using the Sensitive High Resolution Ion MicroProbe (SHRIMP). Our results indicate that there was a volcanic event near the collection site -2.7Ga ago.

Zellner N. E. B. Spudis P. D. Delano J. W. Whittet D. C. B. Apollo I4Impact Glasses and Clementine Data:· Implications for Regional Geology [#1225] Clementine color image data and analyses of 778 lunar impact glasses ·have been used together to suggest that the highlands of the Fra Mauro region consist of a KREEP-rich regolith overlying a feldspathic terrain. Low-KREEP impact glasses may possess a memory of impacts prior to 3.9 Ga ago.

Cohen B. A. Swindle T. D. Taylor L.A. Nazarov M.A. 40Ar-39Ar Ages from Impact Melt Clasts in Lunar Meteorites Dhofar 025 and Dhofar 026 [#1252] Ar-Ar ages of impact melt in lunar highlands breccia Dhofar 025 range from 500 Ma-4.0 Ga from 3-5 different impact events. A -500 Ma crystallization age for highlands melt breccia Dhofar 026 may be the same event as the young Dhofar 025 samples.

Norman M.D. Bennett V. C. Ryder G. Incorporation of Siderophile Elements into Impact Melts from Lunar Basins: PGE@Serenitatis.nasa.org [#1176] PGE in A17 melt breccias reveal specific types of known meteoritic impactors. The lunar crust was not heavily contaminated with siderophiles at 3.9 Ga. Both observations support a cataclysm. High Re/Ir in the upper crust implies a non-chondri tic late veneer or endogenous component.

Arai T. Ishi T. Otsuki M. Mineralogical Study of a New Lunar Meteorite Yamato 98103I [#2064] A mineralogical study was performed on a newly found lunar mare breccia, Yamato 981031.

Kaiden H. Kojima H. Yamato 983885: A New Lunar Mateorite Found in Antarctica [#1958] Petrology and mineralogy of an Antarctic meteorite, Y983885, has been investigated. It has been shown that Y983885 is an anorthositic regolith breccia, indicating its lunar origin.

42 ------33rd LPSC Program .. Nazarov M.A. Demidova S. I. Patchen A. Taylor L.A. Dhofar 301, 302 and 303: Three New Lunar Highland Meteorites from Oman [#1293] Three new lunar meteorites were found in the Dhofar region of Oman. They are highland impact breccias, but each is distinct and distinguishable from other lunar meteorites collected nearby. There should be at least 5 different falls of lunar meteorites in the Dhofar region.

Cahill J. T. Taylor L.A. Anand M. Patchen A. Nazarov M.A. Mineralogy, Petrography, and Geochemistry of Lunar Meteorite Dhofar 081: New Developments [#1351] Lunar meteorite Dh-081 is a shocked, feldspathic-fragmental-highland breccia. Dh-280 was discovered nearby (200 m), a pairing is being considered. New lithologies are described and geochemical comparisons to other lunar meteorites are made.

Anand M. Taylor L. A. Patchen A. D. Cahill J. P. Nazarov M. A. New Minerals from a New Lunar Meteorite, Dhofar 280 [#1653] Three new Fe-Si mineral phases have been found in a new lunar highlands fragmental breccia, Dhofar 280, from Oman. The potential significance of these Fe-Si phases during lunar soil formation and their effects upon spectral reflectivity is immense.

Anand M. Misra K. Taylor L. A. Nazarov M. A. Apparently Kreepy Lunar Meteorite Dhofar 287a: The Residual Melt Tapped from a Fractionating Magma Chamber [#1635] Dhofar 287a is a new lunar mare-basalt meteorite, the best to date. Its KREEPy nature is the result of tapping of residual melt in a highly fractionated magma chamber. It has similarities to Apollo 12 and 15 basalts, yet it is distinctly different.

Demidova S. I. Nazarov M.A. Anand M. Taylor L.A. Clast Population of Lunar Regolith Breccia Dhofar 287B [#1290] The Dhofar 287B lunar regolith material is dominated by different mare basalt lithologies. The main lithology represents a low-Ti, Na-rich basalt, which is compositionally different from known lunar mare basalts.

MacCarthy K. A. Spray J. G. Ryder G. Mechanisms of Lithification of Lunar Breccias [#1720] Eight lunar breccias, four HED meteorite breccias and eight synthesized lunar breccia samples have been examined to determine the nature of the integranular material that bonded the fragments together. All were found to be sintered by grain boundary melts.

Mars Geology

Jernsletten J. A. Latitude-dependent Topographic Variations in the Near-Equatorial Canyons of Mars (Valles Marineris Region) [#1861] This paper looks at the topography of the near-equatorial canyons of Mars. We look at variations in average slope with latitude. Differences between south- and north-facing walls and surface roughness are considered, based on MOLA and Viking data.

J ernsletten J. A. The Central Mesas of Hebes, Ganges, and East Candor Chasmae [#2019] This paper compares the central mesas of Hebes, Ganges, and East Candor Chasmae. Faulting, erosion, and mass wasting are proposed as candidate post-formation evolution processes, based on the surface texture and profiles of DTMs of these canyons.

33rd LPSC Program------43 Noreen E. Hare T. M. Volumetric Calculations of Valles Marineris Using MOLA Data and GIS [#1919] Prior to MGS, topographic estimations of the Valles Marineris were accomplished using photogrammetric techniques. MGS MOLA datasets coupled with GIS provide the means to re-quantify the topography of VM to a higher degree of accuracy.

Maier C. M. Mapping Acidalia Mensa: Redefining Northern Plains Units and Possible Deformation History [#1360] Large-scale mapping leads to new definitions for local geologic units in the northern plains assemblage. Evidence exists for both marine and debris flow deposits. New models suggest that a mesa mapped as an ancient highland may be no older than Amazonian in age.

Kostama V-P. Aittola M. Ohman T. Raitala J. Geological Units of the Hellas Basin Region, Mars [#1486] The uniform geological analysis of the greater Hellas region provides an insight into several phases of Martian geological development and offers a research platform with constant variables for future studies.

Mest S.C. Crown D. A. Geology of MTM Quadrangles -20272 and -25272, Terra Tyrrhena Region of Mars [#1730] Geologic mapping of MTM Quadrangles -20272 and -25272 (1 :500K scale) has allowed detailed characterization of the cratered highlands, including impact crater morphologies, dissection by fluvial valleys, and formatipn of intercrater plains.

Hauber E. van Gasselt S. Jaumann R. Morphology and Topography of Fretted Terrain at the Dichotomy Boundary in Tempe Terra, Mars: General Characteristics [#1658] . The morphology and topography offretted terrain in Tempe Terra is similar to that elsewhere on Mars. Here we give an overview and a companion abstract (Van Gasselt eta!., this volume) reports detailed volume measurements of waste morphology.

Yoshikawa K. Origin of the Polygons and Underground Structures in Western Utopia Planitia on Mars [#1159] The area of lower albedo (Hvm) has a higher density of polygonal patterns. These patterns potentially suggest that 1) the polygonal pattern is caused primarily by ground heaving and collapsing, 2) lower albedo materials had higher tensile strength.

Kuzmin R. 0. Ershow E. D. Komarow I. A. Kozlov A. H. Isaev V. S. The Comparative Morphometric Analysis of Polygonal Terrains on Mars and the Earth High Latitude Areas [#2030] The results of comparative morphometric analysis of polygonal terrains on Mars and the Earth are presented in the abstract.

Mangold N. Forget F. Costard F. Peulvast J-P. High Latitude Patterned Grounds on Mars: Evidence for Recent Melting of Near-Surface Ground Ice [#1219] High resolution MOC images shows patterned ground formed by ground thawing similar to of periglacial regions on Earth. Their distribution in recent terrains at high latitudes is evidence for freeze-thaw cycles that may have been triggered by obliquity changes.

Komatsu G. Di Cencio A. The Origin of Light-Color Units on the Floor of Valles Marineris, Mars [#1184] Light-color materials on the floor of Ius Chasma, a part of the Valles Marineris canyon system on Mars, appear to be exposed old layered deposits or newly formed sediments by hydrological processes.

44 ------33rd LPSC Program Higbie M. A. Herrick R. R. Treiman A. H. Integrated Analysis of Ganges Mensa, Mars [#1770] Using Viking, MOLA, and MOC data, we analyzed the stratigraphy of Ganges Mensa, an interior layered deposit in Ganges Chasma in eastern Valles Marineris. Geomorphic units matching topographic slope breaks were identified on the SW side of the Mensa.

Frey H. V. Roark J. H. Hohner G. J. Wernecke A. Sakimoto S. E. H. Buried Impact Basins as Constraints on the Thickness of Ridged Plains and Northern Lowland Plains on Mars [#1894] The northern lowland plains average 1-2 km but locally vary from less than 0.5 to likely over 5 km in thickness. In Lunae Planum the total thickness of materials overlying likely present but not detectable 100 to 200 km wide craters is 2-3 km.

Gittings H. E. Gregg T. K. P. Erosion of Extensive Tyrrhena Patera Deposits, Mars: Mechanisms and Volumes [#1773] Constraints on the nature of the erosion surrounding Tyrrhena Patera will reveal important information about the volatile and climatic history of the region by providing estimates of the eroded volumes and erosion styles.

King J.D. Albin E. F. Weathering of the Continuous Ejecta Blanket Associated with the Cassini Impact Basin, Mars [#1765] This investigation is concerned with the degree or extent of removal of the Cassini impact basin's continuous ejecta blanket through the study of weathering features using MOC and MOLA data.

Johnson J. R. Lemmon M. T. Grundy W. M. HerkenhoffK. E. Dust Mineralogy and Deposition Rates on Mars from Observations of Mars Pathfinder Calibration Targets [#1392] Spectral changes in the Mars Pathfinder calibration targets during the mission indicate the deposition of atmospheric dust with spectral features suggestive of hematite and palagonite. Sky brightness and two-layer Hapke models will help constrain dust mineralogy and deposition rates.

Vincendon C. Mangold N. Masson P. Ansan V. Estimation of Dust Thickness in Arabia Terra Region [#1208] This study proposes to measure and map the thickness of dust deposits in low thermal inertia regions like Arabia Terra using the distribution of small impact craters at the MOC images scale.

Geissler P. E. McEwen A. S. Leovy C. Biener K. K. Identifying Surface Changes on Mars from Viking and MGS [#1982] We have begun a program of combined Viking and MOC Wide Angle Camera image analysis to identify surface changes on Mars due to aeolian, mass-wasting, aqueous or volcanic processes both from Viking to MGS and from one MGS orbit to another.

Martian Surface Chemistry and Terrestrial Analogs

Socki R. A. Gibson E. K. Jr. Lauriol B. Clark I. D. Romanek C. S. Stable Isotope Enriched Carbonates from the Karst Permafrost Region of Northern Yukon, Canada: A Mars Analog [#1801] We report the isotope composition of samples of cryogenic carbonate collected from a permafrost cave and a perennial spring in northern Yukon. We use these terrestrial settings as an analog for the Martian environment.

Koch-MUller M. Fei Y. Wirth R. Bertka C. M. Characterization of High-Pressure Iron-Sulfur Compounds [#1424] Iron and sulfur are considered to be the major elements in the Martian core. Recent high-pressure experiments revealed that at least three new iron-sulfur compounds, Fe3S2> Fe2S, and Fe3S, were formed at high pressures. In this study, we provide new information on their structure and stability.

33rd LPSC Program------45 Sutter B. Sriwatanapongse W. Quinn R. Klug C. Zent A Physisorbed Water on Silica at Mars Temperatures [#1682] The usefulness of nuclear magnetic resonance spectroscopy in probing water interactions on silica at Mars temperatures is discussed. Results indicate that two types of water occur with silica at Mars temperatures.

Banerjee D. Blair M. Sears D. W. G. McKeever S. W. S. Dating of Martian Meteorites: Characterization of Luminescence from a Martian Soil Simulant and Martian Meteorites [#1561] This paper characterizes the thermoluminescence and optically stimulated luminescence signals from polymineral fine-grains of a Martian soil simulant JSC Mars-1, and the bulk fraction of an SNC Martian meteorite ALH 77005,74. .

Brennetot R. Vors E. Lacour J. L. Fichet P. Fabre C. Dubessy J. Rivoallan A Maurice S. Wiens R. C. Cremers D. A Laser Induced Breakdown Spectroscopy (LIBS) for In Situ Analysis of Mars Soils and Rocks: Spectral Database of Major Elements Si, Al, Fe, Ti Contained in Rocks Samples [#1178] A project called MALIS (Mars elemental Analysis by Laser Induced breakdown Spectroscopy) is under study to perform in situ geochemical analysis of Mars soils and rocks.

Cremers D. A Wiens R. C. Ferris M. J. Blacic J.D. Brennetot R. Maurice S. Development of Laser-induced Breakdown Spectroscopy ( LIBS) for Analysis of Geological Samples on Planetary Missions [#1330] Laser-Induced Breakdown Spectroscopy (LIBS) is being developed for the elemental analysis of geological samples on Mars at stand-off distances up to 20 meters. The analytical capabilities of the method as well as factors that affect design of a prototype instrument are being evaluated.

Tosca N.J. Hurowitz J. A McLennan S.M. Lindsley D. H. Schoonen M. A A Surficial .Processes on Mars: An Experimental Approach [#1354] A variety of surficial processes have been proposed to explain observed surface material on Mars. Some of these models can be tested by flow through experiments investigating the interaction of various fluids with synthetic Martian analog material.

Wang A Freeman J. Kuebler K. E. Raman Spectroscopic Characterization of Phyllosilicates [#1374] An understanding of the structural and compositional controls on the Raman features of the major types of phyllosilicates is presented.

Tripathi A B. Ming D. W. Lauer H. V. Jr. Golden D. C. Boynton W. V. Differential Scanning Calorimetry of Phyllosilicate Minerals at Reduced Pressures: A Mineral Database for the Thermal Evolved Gas Analyzer (TEGA) [#1959] Reduced pressure thermal analysis measurements of the phyllosilicates kaolinite and nontronite were taken to observe the effect of pressure on their thermal curves. This is part of the database for the TEGA instrument.

Foley C. N. Economou T. E. Clayton R. N. The Effect of Distance Change on the Alpha-Mode Abundances for the Pathfinder APXS [#2073] The effects of distance variation on abundances for Pathfinder APXS measurements in the alpha mode have been examined using both theoretical and experimental techniques.

Buhler C. R. Calle C. I. Hirschmann A Denning D. Nowicki A W. Non-Ohmic Discharge Characteristics of JSC Mars-] Martian Regolith Simulant [#1630] The charge decay characteristics of Martian soil simulant are presented. The decay is non-ohmic as seen from experimental measurements of the current-voltage curves.

46 ------33rd LPSC Program Kraft M.D. Sharp T. G. Trueba A. Diedrich T. R. Thennal Emission Spectra of Red, Oxidized Olivine: Implications for Olivine on Mars [#1964] Thermal emission spectra were taken of an oxidized olivine. The oxidized olivine maintains the spectral characteristics of forsteritic olivine. Finding olivine on Mars does not preclude alteration processes from having occurred.

Glotch T. D. Morris R. V. Christensen P.R. Effect of Aluminum Substitution on the Emissivity Spectra of Hematite [#1847] There are small differences in the emissivity spectra of the martian hematite found in Sinus Meridiani, Aram Chaos, and Valles Marineris. We report here on the effects of aluminum substitution on the emissivity spectra of hematite.

Farrand W. H. Lane M.D. Spectral Differences Between Palagonite Tuffs Fanned in Sub-Glacial Versus Liquid Water Environments: Relevance to Mars [#1804] The reflectance and emissivity spectra of palagonite tuffs formed in sub-glacial enviroments are compared with those formed in liquid water environments. The relevance to palagonites produced by water-magma interactions on Mars is discussed.

Vaughan R. G. Calvin W. M. HookS. J. Taranik J. V. Mapping Acid Sulfate Alteration of Basaltic Andesite with Thennal Infrared Data [#1153] Airborne thermal infrared multi- and hyperspectral data sets are used to map sulfate alteration of basaltic andesites near Reno, NV. Alteration includes quartz-alunite, jarosite and a number of clay minerals such as kaolinite and montmorillonite.

Bishop J. L. Pieters C. M. Dyar M.D. Hamilton V. E. Harloff J. A Spectral, Chemical and Mineralogical Study of Mars Analogue Rocks [#1168] The macroscopic and microscopic properties of basaltic and andesitic rocks are under study for integration of diverse spectroscopic approaches to evaluate the composition and texture of Mars materials using both in situ and remote sensing techniques.

Mancinelli R. L. Bishop J. L. DeS. Magnetite in Desert Varnish and Applications to Rock Varnish on Mars [#1046] Magnetite in desert varnish is characterized here using DT A, IR and SEM. The presence of magnetite in desert varnish is significant because of the oxidizing environment. This situation is similar to that of Mars where magnetite may also be present.

Hibbitts C. A. Gillespie A R. Orlando T. M. Alexandrov A Herring J. The Effect of Coatings on the Thennal Emission of Rocks [#1890] Optically thick rock coatings, or varnishes, exist on Earth and possibly on Mars. They have non-linear spectral effects that we are attempting to characterize.

Mars Volcanism

Hauber E. Kronberg P. WolfU. Neukum G. Tempe Volcanic Province Revisited: New Evidence for Mid-Late Amazonian Plains Volcanism on Mars, and a Hotspot Beneath SW-Tempe Terra? [#1516] The morphology and topography of the Tempe Volcanic Province as provided by MGS confirms previous:- and adds new- evidence for plains volcanism-like surface features. We make new age determinations and discuss a possible scenario for its origin.

33rd LPSC Program 47 Ivanov M.A. Head J. W. Alba Patera, Mars: Assessment of its Evolution with MOLA and MOC Data [#1349] Alba Patera is characterized using MOLA and MOC data and new insights into its evolution are described.

Mouginis-Mark P. J. Kallianpur K. J. Heights of Martian Volcanoes and the Geometry of Their Calderas from MOLA Data [#1409] MOLA data are used to determine the heights of 18 Martian volcanoes, caldera depths, and the offset between the caldera rim crest and summit of the volcano. These data are compared to Viking-era estimates, and several differences are identified.

Keszthelyi L. Grier J. A. Distribution of Small Scale Volcanic, Mantling, and Impact Features on Olympus Mons and the Tharsis Volcanoes [#1458] The distribution of volcanic, impact, and tectonic features as well as mantling deposits are examined on the Tharsis volcanoes and Olympus Mons using MOC narrow angle images.

Mitchell K. L. Wilson L. LaneS. J. Factors Limiting the Explosivity of Volcanic Eruptions on Mars [#1766] Numerical models of volcanic eruptions demonstrate that effusive activity is unlikely on Mars. However, massive lava flows are clearly present. We investigate the apparent discrepancy between theory and observation.

Snyder D. Burgisser A. Gardner J. E. Volcanic Fall Deposits on Mars: A Linear Response Theory Approach to Modeling Sedimentation [#1399] Dispersion and sedimentation of particles from volcanic eruptions and dust storms on Mars is described by an invertible linear response theory.

Williams J- P. Paige D. A. Layered Rocks of Valles Marineris: Layered Intrusive Rocks on Mars [#2058] Layered wall rocks in Valles Marineris may result from layered igneous intrusions. Both intrusive and extrusive magmatism occur in large igneous provinces associated with mantle plumes and extension on Earth.

Lucchitta B. K. Late Mafic Volcanism in Valles Marineris, Mars [#1636] Investigation of all available MOC images of the Valles Marineris suggests that much of the surficial dark material inside the troughs is derived from local vents during a late stage of volcanic activity.

Peitersen M. N. Zimbelman J. R. Bare C. Analysis of Geomorphometric Properties of Martian and Terrestrial Long Lava Flows [#1026] Detailed geomorphometric data oflong lava flows (widths, thicknesses, and slopes, indexed by downflow position) from both previously published and new sources are subjected to statistical and analytical techniques.

Crumpler L. S. Vesicularity and Fracture Spacing of Rocks on Degraded Lava Flows: Applicability to Estimates of Atmospheric Density on Early Mars [#1896] Documenting the dimensions and vesicularity of rocks encountered in future landed science missions may enable order-of-magnitude estimates of early atmospheric density.

Warner N.H. Gregg T. K. P. Lava Flow Field Southwest ofArsia Mons, Mars: Estimates and Comparisons of Rheologic Properties [#1324] A lava flow field located SW of Arsia Mons is characterized by flow lobes with thick flow fronts (30- 100m) and ridged surfaces. This indicates a possible evolved composition. Mathematical models are used to estimate and compare the rheologic characteristics of the flow field.

48 ------33rd LPSC Program RowlandS. K. Harris A. J. L. Kallianpur K. J. Vent Locations on Elysium Mons, Mars, from Thermal Modeling of Lava Flows [#1441] We determined lava flow lengths using a thermo-rheological model and, by knowing flow-front locations, constrained vent locations on Elysium Mons, Mars.

Fagents S. A. Pace K. Greeley R. Origins of Small Volcanic Cones on Mars [#1594] Studies of volcanic cones identified in the MGS data indicate a range of possible origins, from primary vent constructs (cinder cones, tuff cones) to rootless cones formed by lava-ice interaction.

Taylor K. Sakimoto S. E. H. Mitchell D. Geometric Comparisons of Selected Small Topographically Fresh Volcanoes in the Borealis and Elysium Planitia Volcanic Fields, Mars: Implications for Eruptive Styles [#1335] MOLA data from small, topographically fresh volcanoes from the Elysium and Borealis regions were gridded and analyzed using GMT prgograms. Results compare eruptive styles of the two regions, and draw conclusions about the different volcanic regions.

Komatsu G. Litasov Y. Subice Volcanism on the Azas Plateau: A Comparison with Possible Martian Tuyas [#1262] Some internal layered deposits in Valles Marineris on Mars have overall geometry and geomorphology similar to tuya volcanoes on the Azas Plateau in the Tuva Republic, implying occurrence of subice volcanism on ancient Mars.

Lanagan P. D. Keszthelyi L. P. Milazzo M.P. McEwen A. S. Water Vapor Diffusion and Implications for Shallow Martian Phreatomagmatic Explosions [#1694] Steam diffusion within the regolith under a lava flow may be an important consideration for shallow phreatomagmatic explosions. We examine the roles of pore saturation and permeability for rootless cone formation.

Ivanov M.A. Head J. W. Syrtis Major and Isidis Basin Contact: Evidence for Interaction Between Lava Flows and Volatile-rich Sediments [#1341] Evidence is presented for the interaction of lava flows and volatile-rich sediments in Isidis Basin from Syrtis Major.

Wilson L. Mouginis-Mark P. J. The Formation of Hrad Vallis, Mars, and Its Associated Deposits by an Explosive Sill-Cryosphere Interaction [#1273] We show that the morphology of the Hrad Vallis depression and its associated deposits can be explained as the · result of a violent phreato-magmatic explosion when a 30-100 m thick sill intruded at shallow ( -400 m) depth into volatile-rich crust.

Albin E. F. King J. D. Exhumation of Intrusive Igneous Complexes on the Margins of Martian Impact Basins [#1747] A search of MOC data along the margins of martian impact basins has revealed the occurrence of features interpreted as igneous intrusive volcanics. Evidence includes the presence of dikes, sills, and batholiths.

Mars Data Archiving, Distribution, and Analysis Techniques

Gulick V. C. Morris R. L. Bishop J. Gazis P. Alena R. Sierhuis M. Geologist's Field Assistant: Developing Image and Spectral Analyses Algorithms for Remote Science Exploration [#1961] We are developing science analyses algorithms to interface with a Geologist's Field Assistant device to allow robotic or human remote explorers to better sense their surroundings during limited surface excursions. Our algorithms will interpret spectral and imaging data obtained by various sensors.

33rd LPSC Program 49 Slavney S. Arvidson R. E. Guinness E. A. Mars Global Surveyor and 2001 Mars Odyssey Science Data Archives [#1303] The Planetary Data System archives data from the MGS mission and is preparing for data from Odyssey. PDS is moving to online access as the main method of data distribution, with expanded online services in time for Odyssey's first release in August.

Ivanov A. B. Duxbury E. D. LaVoie S. K. McAuley M. WoncikP. J. Access to the Mars Global Surveyor Data Through the Planetary Image Atlas [#1902] We will present our latest results in providing access to the Mars Global Surveyor Data through the Planetary Image Atlas. This work is a prototype for future Internet based data distribution systems.

Eliason E. M. McEwen A. S. Delamere W. A. Grant J. A. Gulick V. C. Hansen C. J. Herkenhoff K. E. Keszthelyi L. Kirk R. L. Mellon M. T. Squyres S. W. Thomas N. Weitz C. A Vision for the MRO!HiRISE Operations Center- Getting the Data to the People [#1960] The MRO/HiRISE Operations Center provides a mechanism for Mars investigators to particaipate in selection of targets and access to the aquired images.

Withers P. Hathi B. Towner M. Zarnecki J. Development of Software for Analysing Entry Accelerometer Data in Preparation for the Beagle 2 Mission to Mars: Towards a Publicly Available Toolkit [#1203] We have tested techniques for turning Beagle 2's entry accelerometer data into a T(z) profile. We reproduced the PDS results for Pathfinder. The PDS trajectory for Pathfinder appears "inconsistent with its entry state. Our code is available online.

Blair M. Whitley V. H. Polf J. Banerjee D. McKeever S. W. S. Dating of Martian Sediments: Studies of Luminescence from Materials Irradiated at Low Temperatures [#1543] We present a system that can carry out luminescence dating procedures at low temperatures ( -173 K) to simulate a Martian environment. Also, we have con

Lepper K. Whitley V. H. Distinguishing Sedimentary Depositional Environments on Mars Using In-Situ Luminescence Measurements and Neural Network Analysis [#1400] An additional capability of a remote in-situ luminescence dating instrument is proposed. A neural network analysis method is applied to luminescence data to distinguish between data sets obtained from eolian and fluvial sediments.

Vinogradova T. Anderson R. C. Mjolsness E. Can Tectonic and Fluvial Structures be Used to Date a Planetary Surface? [#2044]. For the first part of our investigation, we will use a new artificial intelligent (AI) software code designed to: (1) recognize craters down to two pixel resolution in size and (2) calculate crater statistics on all available Viking imagery.

Castano R. Anderson R. C. Fox J. Dohm J. M. Haldemann A. F. C. Fink W. Automating Shape Analysis of Rocks on Mars [#2000] We have developed an automated technique to allow a rover to quantify the shape and other geologic characteristics of rocks from two-dimensional visible wavelength images and three-dimensional stereo range data.

Shepard M. K. Sampling the Roughness of a Self-Affine Surface Using Laser Altimeter Pulse-Width Statistics [#1146] We present a model for estimating sub-footprint scale surface roughness from laser altimeter pulse-width statistics.

50------33rd LPSC Program Archinal B. A. Colvin T. R. Davies M. E. Kirk R. L. Duxbury T. C. Lee E. M. Cook D. Gitlin A. R. A MOLA-controlled RAND-USGS Control Network for Mars [#1632] We are undertaking, in support ofMDIM 2.1, many improvements in the RAND-USGS photogrammetric control network for Mars, primarily involving the use of MOLA-derived radii and DIMs to improve control point absolute radii and horizontal positions.

Ivanov A. B. Lorre J. J. Analysis of Mars Orbiter Camera Stereo Pairs [#1845] We have developed stereo image processing procedure for the Mars Orbiter Camera based on VICAR software package. We will present topography and shaded relief maps, extracted from both Wide and Narrow Angle stereo image pairs.

Niedermaier G. Wahlisch M. van Gasselt S. Scholten F. Wewel F. Roatsch T. Matz K-D. Jaumann R. A Topographic Image Map of the MC-18 Quadrangle "Coprates" at 1:2,000,000 Using Data Obtained from the Mars Orbiter Camera and the Mars Orbiter Laser Altimeter of Mars Global Surveyor [#1529] We present a new topographic image map of Mars using data obtained from the Mars Orbiter Camera (MOC) of the Mars Global Surveyor (MGS). The digital map covers the Mars surface from 180° E to 360° E and from 60°S to 60°N with a resolution of 256 pixel/degree.

Wahlisch M. Niedermaier G. van Gasselt S. Scholten F. Wewel F. Roatsch T. Matz K-D. Jaumann R. A New Digital Orthoimage Map of the Martian Western Hemisphere Using Data Obtained from the Mars Orbiter Camera at a Resolution of256 pixel/deg [#1640] We present a new digital orthoimage map of Mars using data obtained from the Mars Orbiter Camera ofMGS.The map covers the Mars surface from 0° to 180°W and from 60°S to 60°N with a resolution of256 pixel/degree. Digital image processing methods have been developed.

Baron J. E. Simpson R. A. Tyler G. L. Radar Backscatter from Surface and Subsurface Rocks: Angular Dependence and Polarization Ratios [#1456] We present numerical results illustrating the differences in diffuse backscattering behavior of surface and subsurface rocks. Surface rocks depolarize more strongly than buried rocks, but the latter exhibit an angular :variation that is more consistent with observed scattering laws.

Mars Landers and Landing Sites

Golombek M. Grant J. Parker T. Schofield T. Kass D. Knocke P. Roncoli R. Bridges N. Anderson S. Crisp J. Haldemann A. Adler M. Lee W. Squyres S. Arvidson R. Carr M. Weitz C. Downs election of Landing Sites for the Mars Exploration Rovers [#1245] Six landing sites that show evidence for processes involving water have been selected from a possible 185 for the Mars Exploration Rovers. These sites are being imaged by orbiting spacecraft and evaluated for science potential and safety before selection of two in May 2002.

Pelkey S.M. Jakosky B. M. Mellon M. T. Physical Properties of MER Landing Site Finalists from MGS TES Data [#1300] Discussion of physical properties of potential martian landing sites as derived from remote sensing data.

Anderson F. S. Parker T. J. Characterization of MER Landing Sites Using MOC and MOLA [#2028] The MOC images for MER are compared with MOLA data to characterize and locate each image. MOLA profiles show that Hematite remains benign, Melas and Isidis are rougher, and Athabasca and Gusev have regions of significant small scale topography.

Crumpler L. S. Tanaka K. L. Hare T. M. Final Analysis of MER Sites Along the Southern Rim of Isidis Planitia [#1923] The geologic characteristics of the current primary MER target ellipse areas for Isidis indicate that large sediment fans occur there that would be applicable to all of the MER/Athena instruments.

33rd LPSC Program 51 Cabral N. A Grin E. A. Pike D. Gusev Crater: A Landing Site for MER A [#1142] We present what makes Gusev crater an outstanding priority candidate landing site for achieving the 2003 MER mission goal and science objectives.

Grin E. A. Cabral N .. A. Leone G. Orofino V. Strategy for the In Situ Search of Evaporite and Carbonate Deposits in Gusev Crater Within the 2003 MER A Landing Ellipse [#1143] Topographic profiles and MOC images suggest that the flat floor of Gusev results from sediment deposition in the absence of strong sub lacustrine currents. This setting is favorable to preserve undisturbed sedimentary sequences and identify carbonates and evaporites in the landing ellipse.

Weitz C. M. Parker T. J. Anderson F. S. Grant J. A. Geology ofa Proposed MER Landing Site in Western Melas Chasma [#1246] A proposed landing site for the Mars Exploration Rover (MER) has been identified in western Melas Chasma. The landing ellipse contains a blocky, bright deposit which we propose formed as a landslide, perhaps beneath a former lake.

Newsom H. E. Barber C. A. Thorsos I. E. Crater Deposits in 2003 MER Landing Sites [#1585] At the Mars Exploration Rover "Hematite" landing site, impact melt and lake deposits from a 140 krn diameter crater have been excavated by an 18 krn diameter crater and probably deposited at the surface of the landing site ellipse. Crater deposits may also be present in the Gusev and Isidis landing sites.

Gilmore M.S. Tanaka K. L. Crater Counts of MOC Images Within the Mars Exploration Rover Sinus Meridiani (Hematite Site) Landing Ellipses [#1881] We will present crater counts of MOC images in the Sinus Meridiani Hematite Region.

Patel M. R. Zarnecki J. C. Characterisation of the UV Environment of the Beagle 2 Landing Site [#1520] A study of the UV environment of the Beagle 2 landing site has been carried out. An instrument to measure the UV flux is present on the lander, and this work serves to aid in the interpretation of expected data.

Kirk R. L. Howington-Kraus E. Archinal B. A. Topographic Analysis of Candidate Mars Exploration Rover Landing Sites from MOC Narrow Angle Stereoimages [#1988] Stereo and photoclinometric analyis ofMOC NA images yield digital elevation models with 10 and 3-m resolution, respectively. Slope analyses of DEMs of Gusev, Melas, Isidis, and Eos suggest all these sites are rougher than currently considered safe.

Beyer R. A. McEwen A. S. Photoclinometry Measurements of Meter-scale Slopes for the Potential Landing Sites of the 2003 Mars Exploration Rovers [#1443] We use a simple photclinometry method on MOC images to determine RMS slopes at the meter-scale for the 6 landing areas under consideration for the 2003 MER landers. Our method provides a quantitative tool for evaluation of meter-scale slopes.

Deardorff D. G. Gulick V. C. Briggs G. A. Marsoweb: A Collaborative Web Facility for Mars Landing Site and Global Data Studies [#1980] Marsoweb is an evolving collaborative web environment for interactive 2D and 3D graphical analysis of data for Mars landing site studies, as well as for global Mars datasets of general scientific interest.

52 ------33rd LPSC Program Yingst R. A. Dutch S. L Analysis of the Fine-Scale Morphology of Mars Analogue Terrestrial Surface Materials: Implications for the MER Microscopic Imager Experiment [#1590] We examine the fine-scale morphology of terrestrial analogues of Mars surface materials at resolutions comparable to the MER Microscopic Imager, in order to reveal clues about the potential importance of water as a past mechanical eroding agent

Kuebler K Jolliff B. L. Wang A. Haskin L. A. A Raman Spectroscopic Study of Samples from the May 2001 FIDO Test Site [#1536] Last May, a rover field test was conducted in the Mojave desert. This study shows what mineralogy a rover-deployed Raman spectrometer might have observed.

Horton K A. Moersch J. E. Lucey P. G. RuffS. W. A Rover's-Eye View in the Thermal Infrared: Spectral Adjacency Effects [#1808] Due to the unique perspective of thermal infrared spectral measurements of geologic targets taken obliquely from a planetary rover or fixed lander, we have conducted several series of experiments designed to explore the various interferences which may arise from the local environment.

Moersch J. E. Horton K A Lucey P. G. RuffS. W. Characterization of Target Adjacency Effects in Horizontal-viewing Thermal infrared Spectroscopy, with Applications to the MER Mini-TES Experiment [#1447] . The horizontal viewing geometry that will be inherent to many of the observations made by the Mars Exploration Rover Mini-Thermal Emission Spectrometers will lead to unfamiliar radiative transfer effects that can significantly alter the apparent emissivity spectra oftargets.

Seelos F. P. IV Guinness E. A. Bowman J.D. Shepard M. K. Snider N. O. Arvidson R. E. Recovery and Analysis of Digital Elevation Data from Viking Lander Camera Observations [#1945] The recovery of the VL Range Data Sets, the development of full stereo solutions from VL images, and a preliminary comparison of the fractal properties of the VLl and Pathfinder landing sites are presented.

Stoker C. R. Rages K. The True Color of Yogi: An Accurate Method for Removing Diffuse Illumination from Multispectral/mages of Mars [#1771] We correct spectra of Yogi to remove diffuse illumination and show that the part of Yogi facing the wind is less red than other faces of the rock. Our method eliminates ambiguity in interpreting spectra obtained under Mars illumination conditions.

Lemmon M. T. Johnson J. R. HerkenhoffK E. Smith P. H. Correcting Spectra of Non-Level Suifaces from the Imager for Mars Pathfinder [#1947] We investigate the effects of target calibration and of illumination on spectra of soils taken by the Imager for Mars Pathfinder. Even after target correction, spectra of non-level soils may include both absolute and relative errors.

Ng T. C. Yung K L. Mars Rock Corer and Planetary Micro Sampling Tools [#1419] Planetary Micro Sampling tools for surface and subsurface rock coring and soil sampling attracted the attention of European Space Agency to appoint the team to develop the Rock Corer for the Mars Lander BEAGLE 2 of their 2003 MARS EXPRESS.

Griffiths A. D. Coates A J. Dust Removal Techniques for the Beagle 2 Stereo Camera System External Optics [#1012] Experiments are described under simulated Martian conditions, to determine the effectiveness of different dust removal techniques. Including stainless steel and PTFE wiper blades, an electrostatic sweeping method and a SMA actuated eyelid.

33rd LPSC Program------53 Larsen K. W. Haldemann A. F. Jurgens R. F. Arvidson R. E. Slade M.A. Radar Observations of Mars, 2001 Opposition [#1800] A series of Earth-based radar observations of Mars were undertaken during the most recent opposition. We present the early results from these observations and compare them to other global Martian data sets.

Ori G. G. Marinangeli L. DiLorenzo S. Ogliani F. Seu R. Biccari D. The Martian Subsurface from the Orbiting GPR MARSIS and SHARAD: Detection and Analysis of Possible Flood Basalts [#1503] Two ground penetrating radars will fly on board of Mars Express and of Mars Reconnaissance Orbiter to investigate the Martian subsurface. The radar will be useful to detect other possible flood basalts and flood basalt-like units on Mars.

Simpson R. A. Highly Oblique Bistatic Radar Observations Using Mars Global Surveyor [#1987] During radio occultations by Mars, transient surface reflections are routinely observed. Despite limitations from the highly oblique geometry and antenna pointing errors, repeatability of observations leads to confidence in conclusions about surface smoothness.

Heggy E. Paillou P. Costard F. Mangold N. Ruffie G. Demantoux F. Geoelectrical Models and Radar Echo Simulation for Sounding the Martian Subsurface [#1740] We present Martian subsurface geoelectrical models for terrains where young fluvial-like features raise the possibility that liquid water may exist at shallow depths.

Geology and Geophysics of Venus and Mercury: Hot Rocks, Hot Science

Grosfils E. B. Ernst R. E. Two Radiating Dike Swamzs in the Nemesis Tessera Quadrangle (V14) on Venus [#1102] Here, as part of an ongoing study of the V14 quadrangle, we provide an initial description of two giant radiating dike swarms, at least one of which formed in a geological setting different than those typical of similar giant dike swarms on Earth.

Harris B. A. Ernst R. E. Desnoyers D. W. The Potential of Using the Largest Radiating Graben Systems (>1500 km) on Venus as Regional Stratigraphic Markers [#1917] Results from this study suggest that there are previously unknown radiating graben systems with> 1500 km radius on Venus, and that the largest radiating graben systems are useful regional stratigraphic markers.

Krassilnikov A. S. Head J. W. Geology, Classification and Evolution of Novae on Venus [#1463] Based on analysis of topography and geology of 64 novae and their environment we suggest updated classification and sequence of evolution of novae. Our results are in agreement with published models of the nova and corona formation.

Kostama V-P. The Four Arachnoid Groups of Venus [#1115] Arachnoids form four large groups which include 114 of the total population. Typical location for a concentration are plains affected by regional compression. They can be considered indicators for regions of interacting volcano- tectonic development.

Johnson C. L. SolomonS. C. A Global Characterization of the Gravity Signatures of Coronae on Venus [#1952] We identify classes of older and younger coronae based on their gravity signatures. Our results indicate that the distribution of coronae has changed over the preserved geological history of Venus.

54 33rd LPSC Program Stofan E. R. Guest J. E. Brian A. W. Anderson S. W. Large Volcanoes on Venus: Eruptive Styles and Emplacement Histories [#1105] We are studying a number of large volcanoes on Venus in order to determine how typical the histories that we have previously described for other venusian volcanoes are, and what these histories imply about the development of large volcanoes.

Lopez I. Lillo J. Hansen V. L. Volcanic Spreading and Regional Extension on Venus: Evidence from the Study ofNe Ngam Mons (43°S/258°E) [#1072] A detailed study of Ne Ngam Mons (43°S/258°E) has been carried out. We argue that the features present in the volcano and the changes in the regional fracture system are due to volcano spreading and its interplay with the regional stress field.

Pelletier S. P. Grosfils E. B. Determining the Altitude of Reservoir-derived Volcanic Features on Venus [#1863] For different reservoir-derived volcanic features in Nemesis Tessera, we explore whether elevation measurements which consider geological history differ from elevations obtained using methodologies employed in previous, global scale studies.

Polit A. T. Koch N. A. Grosfils E. B. Reinen L.A. Shield Fields Within the Nemesis Tessera Quadrangle, Venus [#1673] Here we study small edifice concentrations in parts of Nemesis Tessera to quantify their spatial distribution and density. Does this affect shield field size, and do specific density values characterize different tectonic settings?

Hansen V. L. Young D. A. Lang N. P. Bleamaster B. F. III The Plains ofAphrodite: Geohistory and Modes of Volcanic Resuifacing, Venus [#1121] Geologic mapping of four contiguous VMAPs that cross the planitiae of Northern Aphrodite provides clues for plains surface evolution. Two modes of resurfacing emerge: relatively long and extensive flows sourced dominantly from coronae and, formation of a thin, lacey volcanic shield layer.

Bondarenko N. V. Kreslavsky M.A. Raitala J. Alteration of Volcanic Plains on Venus: Effect on Reflectivity [#1166] We have shown that locally younger volcanic units on Venus usually have locally higher dielectric permittivity, which suggests some process of surface alteration. We compare reflectivity data with two simple physical models of the alteration effect.

Bridges N. T. Mercer C. N. Tectonic and Volcanic History of the Nepthys Mons Quadrangle (V54), Venus [#1914] Mapping of Venus' Nepthys Mons Quadrangle (V54, 300-330°E, 25-50°S) has been proceding for the last 21 months. Discussed here are several intriguing findings and a report on the use of the pseudostereo data set.

Blair A. Ernst R. E. Graben Systems in the Southwestern Part of Nepthys Mons Quadrangle (V-54), Venus [#1628] Detailed mapping of graben systems in the SW Nepthys Mons Quadrangle (V-54) reveals multiple generations including radiating systems associated with four major magmatic centres: Tefnut Mons, Vovchok Patera, Faravari Mons and an unnamed centre along Kara Linea.

Tuckwell G. W. Ghail R. H. The Deformation of Eastern Ovda Regia- Collision and Complexity [#1566] A model is proposed in which domal-uplift occurs simultaneously with a collision event. This model is critically assessed in terms of regional trends of extension and compression, and the late stage structures present in intra-tessera basins.

33rd LPSC Program------55 Matias A. Jurdy D. M. Tectonized and Embayed Impact Craters in the Beta-Atla-Themis Region of Venus [#1228] To assess the nature of deformation in the Beta-Atla-Themis Region, we used the morphological characteristics of craters and their orientation relative to the chasmata. Of particular interest are those that have been both tectonized and embayed by lava.

Bond T. Global Population Modeling of Venusian Craters [#1518] Hypotheses are proposed for a simplified model of venusian volcanics. A model is run to simulate crater formation and obliteration and results analysed with statistical methods.

Jurgens R. F. Margot J-L. Simons M. Pritchard M. E. Slade M.A. Geological Interpretations of the Topography of Selected Regions of Venus from Arecibo to Goldstone Radar Interferometry [#1430] Radar interferometry using Arecibo to transmit and 3 antennas at the Goldstone to receive was conducted on 14 dates in Spring, 2001. This data has been used so far to generate DEMs for several of the dates with pixel resolution of 0.5-l.0 km.

Howington-Kraus E. Kirk R. Galuszka D. Hare T. Redding B. Validation of the USGS Magellan Sensor Model for Topographic Mapping of Venus [#1986] The USGS has validated a sensor model for topographic mapping of Venus using Magellan radar steryoimagery. Validation steps and results are presented.

Luo W. Stoddard P. R. Comparative Hypsometric Analysis of Earth, Venus and Mars: Evidence for Extraterrestrial Plate Tectonics? [#1512] Comparative analysis reveals linear domains iri cumulative hypsometric curves for Mars and Venus, which could result from earth-like seafloor spreading. Venus topographic slope patterns are also similar to those produced by plate rifting on Earth.

Ghail R. C. A Solution to the Problem of the Resurfacing of Venus? [#1759] A new model is presented that combines both global resurfacing and ongoing, quasi-steady state plate-like tectonics on Venus. Comparison is made with the geology of the Archaean Earth.

Zolotov M. Yu. Matsui T. Chemical Models for Volcanic Gases on Venus [#1433] We use geochemical arguments and thermodynamic models to evaluate speciation of volcanic gases at bulk compositions, vent pressures, temperatures and oxidation states of magma determined to be plausible for Venus.

Wilkison S. L. Robinson M.S. Watters T. R. Cook A. C. Preliminary Depth to Diameter Measurements of Mature Complex Craters of Mercury [#1576] Digital elevation data are used to examine the topography of complex craters of Mercury.

WagnerR.J. Wolf U. NeukumG. Time-Stratigraphy and Impact Cratering Chronology of Mercury [#1575] Crater size-frequency measurements were carried out on Mariner-10 image data of Mercury, and an updated cratering chronology model was applied in order to reassess its geologic history which will be investigated in more detail during upcoming missions to this planet.

Kereszturi A. Database of Lunar-like Rilles on Mercury [#1663] We are making a datebase of the locations and physical parameters of rill-like sinuosing channels on Mercury based on the images of Mariner-10.

56 ------33rd LPSC Program Reese C. C. Peterson P. E. Solomatov V. S. Thermal Evolution of Mercury in the Conductive Regime and Implications for Magnetism [#1998] Models of thermal evolution of Mercury with realistic temperature and pressure-dependent viscosity suggest that convection ceased early. A conductive mantle can explain generation of a small magnetic field.

The Cratered Earth

Ormo J. Rossi A P. Komatsu G. Marchetti M. De Santis A The Discovery of a Probable Well-preserved Impact Crater Field in Central Italy [#1075] We propose the first impact craters found in Italy. They form a crater field with about 17 craters in the range 2-20m, and a main crater 140 x 115m. It represents a rare example of well-preserved explosion craters formed in unconsolidated targets.

Rossi A P. Seven Possible New Impact Structures in Western Africa Detected on ASTER Imagery [#1309] Seven possible impact structures have been found in W Africa on ASTER images. Their diameters vary from few hundreds of meters up to few kilometers. They are located in Mauritania, Mali and Niger, on a sedimentary or metamorphic bedrock.

Miura Y. Hirota A Gorton M. Kedves M. Impact-related Events on Active Tectonic Regions Defined by Its Age, Shocked Minerals and Compositions [#1231] New type of impact-related event is defined at active tectonic region by using semi-circular structure, bulk XRF compositions with mixed data, shocked quartz grains with the PDFs texture, and Fe-Ni content. Example is discussed in Takamatsu MKT crater in Japan.

Krochuk R. V. Sharpton V. L. Overview ofTerny Astrobleme (Ukrainian Shield) Studies [#1832] A brief summary of Terny astrobleme observations, including history, petrographic and mineralogical evidences of impact, structure of the crater at current erosion level.

Pesonen L. J. Reimold W. U. Gibson R. L. Preliminary Paleomagnetic and Rock Magnetic Data of the Vredefort Structure, South Africa [#1187] Paleomagnetic data of the Witwatersrand Basin reveal an Archean remanence direction, Vredefort-Bushveld direction, and a 1.1 Ga direction. The central Vredefort Dome is characterized by extreme Q-values.

Powars D. S. Johnson G. H. Edwards L. E. Horton J. ,W. Jr. Gohn G. S. Catchings R. D. McFarland E. R. Izett G. A Bruce T. S. Levine J. S. Pierce H. A An Expanded Chesapeake Bay Impact Structure, Eastern Virginia: New Corehole and Geophysical Data [#1034] Data from several deep coreholes, seismic reflection surveys, and surface mapping indicate that the buried Chesapeake Bay impact structure is wider (160 km, due to -35-km-wide outer fracture zone) and deeper (2 miles) than previously reported.

Hildebrand A. R. Pilkington M. Crater-Floor Exhalative (Crafex) Sulfide Deposits at the Chicxulub Crater, Yucatan, Mexico [#2031] The melt sheet of the Chicxulub crater has been altered along fractures producing narrow zones of intense alteration that have a strong magnetic expression. These zones of hydrothermal alteration are believed to underlie exhalative mounds imaged by an offshore seismic line.

McHone J. F. Roddy D. J. Shoemaker C. S. Williams K. K. Klemaszewski J. E. Spider Impact Structure, Western Australia Imaged with Space Shuttle Radar [#1990] Thirteen kilometer diameter Spider astrobleme in Western Australia was recorded in remarkable detail by imaging radar aboard the space shuttle Endeavour.

33rdLPSCProgram ______57 Mazur M. J. Hildebrand A. R. Hladiuk D. Schafer A. Pilkington M. The Steen River Crater Seismic Refraction Project [#1736] Rim uplift, slump blocks, CDC edge, central uplift, and inverted flap are indicated by refraction methods. The inverted flap also has a gravity high and may explain the puzzling partly annular gravity high ringing the CDC at the Chicxulub crater.

Glass B. J. Lee P. Osinski G. Airborne Geomagnetic Investigations at the Haughton Impact Structure, Devon Island, Nunavut, Canada: New Results [#2008] The well-preserved -23-Ma Haughton impact structure has an original rim diameter estimated at about 24 km. This work extends and completes the survey begun in 1999 to characterize the geomagnetic signature of Haughton. Mapping extent was about 75 x 60 km in order to clearly delineate regional features.

Plescia J. B. Gravity Survey of the Rock Elm, Wisconsin Structure [#1573] Gravity data over the Rock Elm structure indicate that no anomaly associated with the structure is present. This suggests that it is either deeply eroded or not an impact structure.

Ohman T. Kostama V-P. Aittola M. Raitala J. Badjukov D. Martian Analogues for Kara Impact Structure, Russia [#1270] Several craters in Hellas region show evidences of deformation by water. Some bear similarity to Kara impact structure, Russia. Comparative study of the impact craters provide information on Hellas' geology as well as on the evolution of the Kara.

Tsikalas F. Faleide J. I. Near-Field Erosional Features at the Mj¢lnir Impact Crater: The Role of Marine Sedimentary Target [#1296] The Mj0lnir impact into a shallow marine sedimentary basin in the Barents Sea at -142 Ma gave rise to subtle near-field erosional features in the crater vicinity as a result of the unconsolidated shaley sediments at the shallowest target levels.

WadeS. Lichtenegger J. Barbieri M. Rudant J-P. Deffontaines B. Fruneau B. MasterS. Application of Satellite Radar Interferometry in Enhancing the Morphology of the Velingara Structure, Casamance, Senegal[#1556] · Interferometry of Synthetic Aperture Radar (SAR) imagery from the ERS-1and2 satellites has been used to produce a digital terrain model (DTM) of the 48 km-diameter Velingara structure in Casamance, Senegal, which strongly resembles an impact structure.

Tornabene L. T. Ryan J. G. Stewart R. H. The Gatun Structure: A Petrographic and Geochemical Investigation into a Possible Tertiary Impact Structure near Gamboa, Republic de Panama [#1249] The occurrence of breccias that include both glass fragments, spherules, and phases with indicators of flow and plastic deformation, have been found within a circular feature near the Panama Canal -the Gatun structure.

Cratering Processes and Products

Hertzsch J-M. Ivanov B. A. Kenkmann Th. Shock Propagation in Heterogeneous Solids- Numerical Simulations [#1217] The aim of our project is to create a numerical model of the shock compression of natural rock. It should be able to simulate natural impact events as well as laboratory experiments.

Shuvalov V. V. Displacement of Target Material Due to Impact [#1259] The purpose of this study is to develop a numerical model for accurate descriptions of the target material displacements both due to cratering flow and due to expansion of ejecta through the atmosphere.

58 33rd LPSC Program Wlinnemann K. Ivanov B. A. Lange M.A. Numerical Modeling of the Scale Dependence of Impact Crater Morphology in an Acoustic Fluidized Target [#1277] We study simple to complex crater transition with a numerical model. The scaled acouistic fluidization model, incorporated into a hydrocode, allows us to reproduce the difference between Earth and the moon in respect to this transition.

Collins G. S. Melosh H. J. Target Weakening and Temporary Fluidization in Large Impact Events [#1523] We compare the merits of several weakening mechanisms postulated in the literature to explain complex crater collapse. We present a new methodology for simulating the effect of acoustic fluidization during complex crater collapse and discuss preliminary results.

Shuvalov V. V. Dypvik H. Tsikalas F. Numerical Modeling of the Mj¢lnir Marine Impact Event [#1038] The Mj0lnir crater (40km) in the Barents Sea is a complex crater created by a meteoroid impact into a shallow sea (142 Ma). We model numerically the cratering processes, the ejecta distribution, and the tsunami wave generation and propagation.

Wasserman A. A. Melosh H. J. Lauretta D. S. Fulgurites: A Look at Transient High Temperature Processes in Silicates [#1308] Fulgurites result from transient high temperature processes, and some have extremely reduced phases. We performed both modeling and a microprobe analysis of natural fulgurites. The modeling suggests vapor phase C causes reduction of silicate liquid.

Ohno S. Sugita S. Kadono T. Hasegawa S. Igarashi G. Mass Spectroscopic Observation of Sulfur Chemistry in Laser-simulated Impact Vapor Clouds [#1634] Impact-degassed sulfur oxides would have played important roles in the mass extinction on the KiT boundary. We carried out chemical equilibrium calculation and mass spectroscopic experiment to estimate the S02/S03 ratio in the KiT impact vapor plume.

Kamo S. L. Krogh T. E. Glass B. P. Liu S. U-Pb Study of Shocked Zircons from the North American Microtektite Layer [#1643] U-Pb lead isotopic data have been determined for 68 zircons from an upper Eocene microtektite/ejecta layer on Barbados and at three core sites off New Jersey. Data from the most intensely shock-metamorphosed grains indicate a source rock with an age of 400 Ma, implying the same source crater.

Coffield J. E. Urdiales M. Lindstrom M. M. Merrill G. K. Mittlefehldt D. W. Lee M. Robertson J.D. Higgins B. J. Kyger J. R. Investigation of Possible Causes for the Presence of High Iridium Concentrations in Sedimentary Rock Samples from the Mississippian-Pennsylvanian Boundary [#1921] Understanding the causes of elevated siderophiles in terrestrial rock samples is essential in determining the effectiveness (and limitations) of the use of siderophiles as an indicator of impact events.

Croskell M.S. Collins G. S. Formation of the Double KIT Boundary Layer in North America [#1103] The salient features of the Western Interior KiT boundary layer are considered and a new formation mechanism postulated.

McDonald I. Simonson B. M. PGE Anomalies Detected in Two More 2.5-2.6 Billion Year-old Spherule Layers in the Hamersley Basin of Western Australia [#1250] The early Precambrian Jeerinah and Dales Gorge spherule layers (Hamersley basin, Western Australia) are enriched in PGEs relative to surrounding strata. The PGE signature of the Dales Gorge layer is extraterrestrial and suggests the impactor was an enstatite chondrite asteroid.

33rd LPSC Program------59 Osinski G. R. Spray J. G. GrieveR. A. F. Where Have All the Melts Gone? [#1078] Evidence from the Haughton impact structure (Osinski eta!. this vol.) suggests that carbonate rocks do melt during hypervelocity impact events. The impact melting of sedimentary versus crystalline rocks is discussed in the light of this new work.

Rajmon D. Copeland P. Reid A.M. "Pseudotachylytes" That Never Melted: A Thermal Story from Rater Kamm Crater, Namibia [#1944] The rim rocks of the 2.5 km Roter Kamm crater in southwest Namibia are cut by breccia veins that macroscopically resemble pseudotachylytes. 40 Ar/39 Ar data, coupled to other published data, show that these veins never approached melting temperatures and only" attained temperatures of 250-330°C.

Cudnik B. M. Dunham D. W. Palmer D. M. Cook A. C. Venable R. J. Gural P. S. Ground-based Observations of High Velocity Impacts on the Moon's Surface- The Lunar Leonid Phenomena of 1999 and 2001 [#1329] Ground-based observations of lunar impacts from the 1999 and 2001 Leonid meteor encounters are presented, with a brief description of computer software useful in the automated detection of lunar meteor flashes.

Ernst C. M. Schultz P. H. Effect of Velocity and Angle on Light Intensity Generated by Hypervelocity Impacts [#1782] Experiments performed at the NASA AVGR s-how the velocity and angular dependence of the light intensity of impact-generated plumes.

Spitale J. N. NEA Hazard Mitigation Using the Yarkovsky Effect [#1223] A subtle radiation force known as the Y arkovsky effect might be harnessed to prevent collisions between NEAs and the Earth.

Interplanetary Dust and Micrometeorites

Kearsley A. T. Graham G. A. Yano H. Wright I. P. Micrometeoroids and Orbital Debris Preserved on Multi-Layered Insulation Foils from the Japanese Space Flyer Unit Spacecraft [#1122] Micrometeoroid and orbital debris particles are preserved as abundant and well-preserved residues on Multilayer Insulation (MLI) foils that were exposed to LEO during the flight of the Japanese Space Flyer Unit (SFU). MLI holds great potential as a repository of natural particles.

Sasaki S. Igenbergs E. Ohashi H. Hofschuster G. Muenzenmayer R. Naumann W. Senger R. Fischer F. Fujiwara A. Gruen E. Hamabe Y. Kawamura T. Mann I. Miyamoto H. Nogami K. Svedhem H. Observation of Interplanetary and Interstellar Dust by Mars Dust Counter on Board NOZOMI: Three-Year Results [#1167] Mars Dust Counter (MDC) on board NOZOMI has detected more than 90 dust impacts in three years. In interplanetary observation from 1999, MDC has detected about 60 interplanetary particles moving around the sun and several interstellar dust particles.

Joswiak D. J. Brownlee D. E. Plagioclase Feldspar Minerals in 5-15p,m Chondritic IDPs Collected in the Stratosphere [#1767] Albitic and anorthitic plagioclase feldspars were found in nine CP stratospheric IDPs. The albitic feldspars are likely to have secondary origins while the anorthic feldspars may represent sampling from condensates produced during solar nebula evolution.

60 ------33rd LPSC Program Austin D. E. Manning H. L. K. Bailey C. L. Farnsworth J. T. Ahrens T. J. Beauchamp J. L. Hypervelocity Microparticle Impact Studies: Simulating Cosmic Dust Impacts on the Dustbuster [#1939] Iron and copper microparticles accelerated to 2-20 km/s in a 2 MV Van de Graaff accelerator were used to test a recently-developed cosmic dust mass spectrometer, known as the Dustbuster.

Floss C. Sta.dermann F. J. NanoSIMS Measurements of Nitrogen Isotopic Distributions in IDPs and Renazzo: Uniform 15N Enrichment in a Chondritic IDP [#1350] Most of the IDP Kipling is enriched in 15N by 500%o. It also contains two subgrains with 815N values of >1000%o. Renazzo matrix fragments are less enriched in 15 N, suggesting either different carriers or different degrees of parent body processing.

Yin Q-Z. Chemical Signatures of Interstellar Dusts Preserved in Primitive Chondrites and Inner Planets of the Solar System [#1436] . We show that the inheritance of interstellar materials by the solar system is not only documented by the presence of presolar grains, various isotopic anomalies, but also expressed in the chemical element distribution in the inner solar system.

Chronology: The Long and Short of It

Sugiura N. Mn-Cr Chronology of Olivine in Some Meteorites [#1435] Mn-Cr systematics of olivine grains in angrites, a pallasite, an acapulcoite and some chondrules were studied by SIMS. Good isochrons were obtained for angrites.

Bogard D. D. Garrison D. H. 39Ar- 40Ar Ages of Two Unusual Pifferentiated Meteorites: NWA -176 Iron and GRA98098 Eucrite [#1212] An Ar-Ar age of 4.53 Gyr for silicate from the NWA-176 iron may indicate a parent body break-up event at this time. An Ar-Ar age of 4.47 Gyr for the unusual eucrite GRA98098 may be related to similar ages for cumulate and unbrecciated eucrites.

Dixon E. T. Bogard D. D. Garrison D. H. 40Ar-39Ar Chronology of LL Chondrites [#1114] There are three main models to describe the accretion and cooling history of the asteroidal parent bodies of ordinary chondrites: the onion-shell, rubble-pile and re-assembly models. 40 Ar-39 Ar ages were determined on several LL3-6 chondrites to evaluate these models.

Meshik A. P. Hohenberg C. M. Pravdivtseva O. V. Bematowicz T. J Double Beta Decay ofTellurium-130: Current Status [#1342] Geochemically measured values of 130Te half-life form two distinct clusters. Two different experiments were performed to check two proposed explanations: Xe loss and Xe inheritance. Neither is observed.

Nichols R. H. Jr. Brannon J. C. Podosek F. A. Excess 135-Bariumfrom Live 135-Cesium in Orgueil Chemical Separates [#1929] We have measured the Ba isotopic compositions in eleven sequential step-wise dissolution fractions from Orgueil. Evidence for excess 135-Barium from the decay of live 135-Cesium is presented.

Planetary Formation and Early Evolution

Genda H. Abe Y. Hydrodynamic Escape from Disks Formed by Giant Impacts [#1452] Circumterrestrial disk formed by a giant impact can escape from the Earth, because the disk is likely close to isothermal. A criterion for the escape and its dependence on the physical parameters was estimated from the hydrostatic equation.

33rd LPSC Program------61 Machida R. Abe Y. Evolution of the Proto-Lunar Disk: Instability of the Dust Layer and the Moon Farming Material [#1690] There are two possible modes of gravitational instability in the proto-lunar disk: the instability of the dust -gas mixture and that of the dust layer. We examine the preferred mode of instability and the state of the Moon-forming materials.

Draper D. S. Xirouchakis D. Agee C. B. Effect of Majorite Transformation on Garnet-Melt Trace Element Partitioning [#1306] We show how the onset of the transformation of garnet to majorite affects trivalent cation partitioning and develop predictive relationships for partitioning at 5 to 9 GPa.

Caprarelli G. Variation of SeN Ratios in the Mantle: A Geochemical Link to the Lower Mantle Percolation of Core Melts? [#1325] Basalt compositions indicate that the Earth's mantle Sc!V ratio decreases with depth, possibly due to stranding of liquid metal in lower mantle rock during core-mantle segregation. Correlation of Co with V abundances supports this interpretation.

Xirouchakis D. Draper D. S. Agee C. B. The Garnet to Majorite Transformation in Mafic Compositions [#1316] The garnet to majorite transformation in mafic compositions is controlled by bulk composition and the presence of silicate melt, clinopyroxene, and silicate perovskite as well as pressure. Thus, the use of empirical geobarometers 4 3 3 based on garnet Si + and/or [Al + ± Cr +] (p.f.u) seems unjustified.

Agee C. B. Garnet and Majorite Fractionation in the Early Earth and Mars [#1862] Early mantle differentiation in Mars and Earth may share some similarities that are still preserved in particular major and trace element ratios of shergottites and aluminum-depleted komatiites (ADK).

Karner J. M. Papike J. J. Shearer C. K. Systematics of Vanadium in Olivine from Planetary Basalts [#1301] The systematics of vanadium in olivines from the Earth, Moon and Mars allows for the comparison of planetary basalt origin and igneous setting and process.

Hustoft J. W. Kohlstedt D. L. Redistribution of Core-forming Melt During Shear Deformation of Partially Molten Peridotite [#1569] To investigate the role of deformation on the distribution of core-forming melt in a partially molten peridotite, samples of olivine-basalt-iron sulfide were sheared to large strains. Dramatic redistribution of sulfide and silicate melts occur during deformation.

Solomatov V. S. Constraints on the Grain Size in the Mantles of Terrestrial Planets [#1446] Viscosity of planetary interiors strongly depends on the grain size. However, the grain size remains an arbitrary parameter in geodynamic models. This study reviews relevant physical processes and provides constraints on the grain size.

Fairen A. G. de Pablo M.A. Castilla G. Ruiz J. Anguita J. Hacar A. Toloba E. Garcia A. Rodriguez S. Three Ages from the Martian Lithosphere [#1131] The magnetic lineations detected in Mars were originally explained as a sea-floor spreading effect. Here we argue instead that the lineations were formed at a convergent plate margin, through both the accretion of terranes and back-arc spreading.

62 ------33rd LPSC Program Lentz R. C. F. Taylor G. J. Petrographic Textures and Insights into Basaltic Lava Flow Emplacement on Earth, the Moon and Vesta [#1332] Quantitative analyses of terrestrial basalts show a clear association between petrographic texture and lava emplacement style. Similar analyses of lunar basalts and non cumulate eucrites suggest pahoehoe-like emplacement histories for these basalts.

Ferlito C. Ori G. G. An Erosional Lava Channel from the 2001 Eruption of Mount Etna (Sicily, Italy): Occurrence and Planetmy Implications [#1202] Erosional lava channels are common in the planetary record. An erosional channel formed during the 2001 eruption of Mount Etna may provide some clues on the origin of the lava channels in other planets.

Gregg T. K. P. Bulmer M. R. Warner N.H. Lava Flow Field at Sabancaya Volcano, Peru: Analog for Extraterrestrial Lavas? [#1565] 2 Sabancaya volcano, Peru displays a large (-60 km ) andesitic flow field comprising 39 individual lobes. Our understanding of the behavior of evolved lava flows on Earth is limited, and we must understand the terrestrial analogs before we can hope to understand their behavior on Mars and Venus.

Rudoy A. N. Late-Quaternary Diluvial Floodstreams in the Mountains ofAltai and Tuva (Paleoglaciological Base, Geological Effect, Level of Problem Study) [#1110] Russian works on geological consequences of giant ice-dammed lake outbursts in Altai were first published 20 years ago. Recent expeditions have shown that diluvial formations in regions of America and Eurasia must be characteristic of all areas that experienced quaternary glaciation.

Sharkov E. V. Bogatikov O. A. Similarities and Distinctions of the Tectonic-Magmatic Evolution of the Earth and the Moon as a Key for Understanding of Processes of the Solid Planetary Bodies Formation and Their Inner Development [#1011] Evolution of Earth and Moon was accompanied by sharp changing of their tectonic-magmatic activity. It favours to heterogeneous accumulation of the planets which central parts were mobilized in process related to gradual inward warming of the bodies.

Education

Morris P. A. Lindstrom M. M. Allen J. Sumners C. Obot V. Wooten J. An Urban Minority Outreach Program in Space Science: A Collaborative Effort Between NASAIJSC, University of Houston Downtown, Texas Southern University and Houston Museum of Natural Science [#1363] The program includes short term and long term programs for grades pre-K-16, graduate and inservice teacher training. The goal is to encourage more minority and underrepresented groups to pursue space science.

Karner J. M. Newsom H. E. Jones R. H. Simmons J. Garcia T. Livingston D. Townend B. Meteorite Identification -A Partnership Opportunity [#1855] We have begun a partnership between the Institute of Meteoritics at the University of New Mexico and the Southwestern Indian Polytechnic Institute (SIPI) to involve SIPI students in the identification and characterization of samples provided by the general public as possible meteorites.

Gerszewski M. ACIT: The Upgrades and the Beta Test [#1617] The Asteroid and Comet Internet Telescope (ACIT) project has made several advances over the past few years. This platform will allow Space.edu distance students the opportunity to use a large telescope for research purposes without leaving their home.

33rd LPSC Program 63 McElfresh S. B. Z. McCloskey W. R. Coppin P. Martinelli D. Crown D. A. Using EventScope with Mars Mission Data to Create Geoscience Curricula [#1372] EventScope is an educational software application that incorporates Mars mission data to teach geologic and scientific concepts using 3D models of planetary surfaces. It serves as a supplement to middle school science curriculum.

Klug S. L. Christensen P.R. Watt K. Valderrama P. Using Planetary Data in Education: The Mars Global Surveyor and 2001 Mars Odyssey Missions [#1758] The ASU Mars Education Program has focused on creating National Science Education Standards-aligned curricular materials and programs that use actual Mars mission data to excite, motivate, and challenge students to increase their science literacy.

Arvidson R. E. Bowman C. D. NelsonS. V. Sherman D. M. Squyres S. W. Student Participation in Rover Field Trials [#1540] LAPIS, an active-participation educational program, originated in 1999 as part of Athena education and public outreach. It was designed to involve small groups of high school students and their teachers in the development and implementation of a simulated Mars rover mission.

Speyerer E. J. Robinson M.S. Barch A. Peterson C. BellM. Veverka J. NEAR MSI Movies of Eros: A New Tool for Scientists and Educators [#1209] The NEAR MultiSpectral Imager returned -140,000 images with a resolution range of 40 m/p to 1.2 cm/p. We have processed 100 movie sequences (32,261 images) into a standard movie product. This format represents a powerful analysis tool, as well as a compelling education aid.

Milford C. R. Donohue P. J. Astronomy and Linking Learning to Life Through Technology [#1401] Dakota Skies offers learners a universe that replicates the mechanics and principles of space science. The NatureShift Web site has mastered the challenges of presenting technical information to young learners in a manner that encourages them to want to learn.

Beiersdorfer R. E. Tapping Our Students' Creativity to Learn Earth and Planetary Science [#1355] I will describe a series of group projects designed to enable students to learn earth and planetary science course content while they are synthesizing and applying the subject matter in creative ways.

Urquhart M. L. Stars and Planets: A New Set of Middle School Activities [#2007] A set of lesson plans for grades 6-8 which deal with the sizes and distances of stars and planets using a scale factor of 1 to 10 billion, the life cycle of stars, and the search for planets beyond the solar system.

Lindstrom M. Allen J. Tobola K. Stocco K. Using Science Data in the Secondary School Classroom: Examples from JSC Astra-Materials and Astrobiology [#2016] We report on JSC efforts to communicate science and enhance K-12 education by using research data in classroom activities. Our scientist-educator partnership has produced lessons and informative slideshows for secondary schools.

Berczi Sz. J6zsa S. Szakmany Gy. Dimeo A. Deak F. Kubovics I. Puskas Z. Unger Z. How We Used NASA Lunar Set in Planetary and Material Science Studies: From Basaltic TTT-Diagrams of Lunar Basalts to Cellular Automata Transformations of Textures [#1024] NASA Lunar Set basalts' a) paragenetic sequences, b) textural characteristics (model by cellular automata), c) cooling rates were studied, TTT diagram of basalts was constructed, technologies (industrial TTT diagrams) were compared.

64 ______33rd LPSC Program Kabai S. Miyazaki K. Berczi Sz. Space Science Education with Mathematica: Interactive Design Modular Space Station Structures with Computer Algebra: Principles, Functional Units, Motions, Examples [#1041] We worked out a course with interactive Mathematica program to design Space Stations with icosahedraVdodecahedral tiling system of subunits, with motions for observing maneuvering space. Constraints/principles from geometry are also discussed.

Hargitai H. Kereszturi A. Sik A. Varga T. Szabo Soki L. Maros G. Berczi Sz. Planetology Group's Educational Outreach Results at Eotvos University, Hungary [#1261] Educational activity of the Planetology Group at Eotvos University, Budapest, Hungary: Web-based hypermedia package, Atlas of the Solar System, Slide Set, Lectures, Interactive study of Lunar Samples, Planetary Cartography (multilingual Mars map).

Bonett D. M. Whittemore-Smith G. K. E. Little and the Texas STARBASE Experience [#1257] 25 fifth grade students from Bacliff, Texas will be participating in a hands-on interactive science education experience called Starbase Texas at Ellington Field January 9th-February 6th.

Thompson P. B. Kiefer W. S. Treiman A. H. Irving A. J. Johnson K. M. Space Science Field Workshops for K-12 Teacher-Scientist Teams [#1897] In collaboration with NASA Space Grant Consortia and other partners, we developed worksl}ops for K-12 teachers that involve intensive, direct interaction with scientists. Field trips allow informal and spontaneous interaction, encouraging active participation.

Miller J.P. Fetters J. West K. Frazee P. Summer Program in Planetary Scienc;e and Astronomy for Gifted and Talented High School Students [#1002] The Summer Science and Mathematics Program (SS&MP) is an 8-week program in planetary science and astronomy for gifted and talented high school students. Students undertake research projects, which include current topics in planetary science.

33rd LPSC Program------65 .. Wednesday, March 13, 2002 LUNAR BASALTS: THE WIND CRIES MARE 8:30 a.m. Salon A

Chairs: J. J. Gillis K. Righter

Elphic R. C.* Lawrence D. J. Maurice S. Feldman W. C. Prettyman T. H. Gasnault O. M. Binder A. B. Lucey P. G. An Index for Evolved Lithologies on the Lunar Suiface: Lunar Prospector Thorium-to-RE£ Ratio [#2009] Using Lunar Prospector neutron and gamma ray spectrometer data, we develop an "evolved lithology index" based on the ratio of thorium to rare earth element abundance. This is useful in identifying exotic c.:ompositions.

Gasnault O. * Lawrence D. J. Vaniman D. T. Elphic R. C. Feldman W. C. Systematics on Thorium in Lunar Basalts [#2010] We study the thorium content in lunar mare basalts. A severe selection is made to make sure that the studied sub-dataset is representative of basaltic flows. The thorium distribution in those basalts presents strong patterns. Relation with iron, age, and topography are investigated.

Vaniman D.* Lawrence D. Gasnault O. Reedy R. Extending the Th-FeO Sampling Range at Apollo 14: Under the Footprint of Lunar Prospector [#1404] Using measured FeO and using K as a Th surrogate, glasses in Apollo 14 regolith breccias provide a wider sampling than other Apollo 14 samples. The range of variation compares broa(jly with that found by Lunar Prospector for the whole Moon.

Gillis J. J.* Jolliff B. L Korotev R. L. Lawrence D. J. The Origin of Elevated Th in the Eratosthenian Lava Flows in the Procellarum KREEP Terrane [#1934] Clementine spectral reflectance and compositional data, Lunar Prospector gamma ray and neutron spectrometer data, and sample analysis of lunar soils are used to examine the origin of high-Th in Eratosthenian basalts of the Procellarum KREEP Terrane

Lawrence D. J.* Elphic R. C. Feldman W. C. Gasnault O. Genetay I. Maurice S. Prettyman T. H. Small-Area Thorium Enhancements on the Lunar Suiface [#1970] The spatial resolution of the LP-GRS global thorium abundances has been optimized and new abundances have been mapped onto 0.5 o pixels. With this map, we identified a number of small-area (<60 km) thorium enhancements including the Compton/Belkovich thorium anomaly and Timocharis crater.

Staid M. L * Pieters C. M. Gaddis L R Eliason E. Spectral Comparisons of Mare Basalts from Clementine UVVIS and NIR Data [#1795] Clementine UVVIS and NIR multispectral data are used to characterize the reflectance properties (0.4-2.0 microns) of the least weathered (most crystalline) and uncontaminated surfaces within major mare deposits.

Antonenko L * Yingst R. A. Mare and Cryptomare Deposits in the Schickard Region of the Moon: New Measurements Using Clementine FeO Data [#1438] Clemetine FeO data was used to estimate thickness, area, and volume of mare and cryptomare units in the Schickard region of the Moon. The results show more mare patches than previously mapped in the area. Cryptomare units were also better defined.

Hawke B. R. * Lawrence D. J. Blewett D. T. Lucey P. G. Smith G. A. Taylor G. J. Spudis P. D. Remote Sensing Studies of Geochemical and Spectral Anomalies on the Nearside of the Moon [#1598] A variety of remote sensing data was used to determine the composition and origin of selected spectral anomalies (Red Spots) on the Moon.

66 33rd LPSC Program Hiesinger H.* Head J. W. III WolfU. Jaumann R. Neukum G. Thicknesses of Lunar Mare Flow Units: A New Investigation Based on Crater Size-Frequency Distribution Measurements [#1065] We used crater size-frequency distribution measurements in order to estimate the thickness and the volume of flow units in several nearside basins. We found that thicknesses of flow units are on the order of 30-60 m and volumes 3 are about 590-940 km .

Theno T. W.* YingstR. A. Lava Pond Characterization in Mercurius Crater, Mercurius C, and the Surrounding Region [#1926] We surveyed the lava ponds within the Mercurius region for inclusion in ongoing lava pond mapping and classification. Pond morphology, FeO and Ti02 content, depth, and volume, were used to provide a more detailed geologic picture of the region.

Tompkins S. * Indications of Magma Ocean Variability in Fresh Highland Craters [#1829] Craters with mafic lithologies are rare in the highlands, but where they do occur there is evidence for large, near-surface units of relatively uniform composition. Several such craters are analyzed for insight into magma ocean variability.

Righter K.* Nickel and Cobalt Partitioning Between Spinel and Basaltic Melt: Applications to Planetary f3asalt Suites [#1253] New experimental spinel/melt partition coefficients for Ni and Co have been measured in basalt samples with . natural levels of Ni and Co, are lower than previous high doping experiments, and are applied to several planetary basalt suites.

Yakovlev O. I. Dikov Yu. P. Gerasimov M. V.* Wlotzka F. Huth J. The Behavior of Pt in Silicate Melts During Impact-simulated High Temperature Heating [#1271] Experimental simulation of an impact vaporization of aPt-rich target shows the formation of Pt-Fe particles. The formation of metallic iron phases during an impact provides appropriate conditions for the separation of Pt into a metallic iron phase.

33rd LPSC Program------67

'. Wednesday, March 13, 2002 MARTIAN POLES AND VOLATILES 8:30 a.m. Salon B

Chairs: A. V. Pathare D. L. Blaney

Kolb E. J. * Tanaka K. L. Non-Glacial Interpretations of Long-Temz Mars South Polar Volatile History Based on MGS Data and New Geologic Mapping [#2003] In this abstract we present non-glacial interpretations of the long-term south polar volatile history based on new geologic mapping.

Kargel J. S.* Tanaka K. L. The Martian South Polar Cap: Glacial Ice Sheet of Multiple Interbedded Ices [#1799] The southern Martian polar cap exhibits multiple, widespread indicators of deformation attributable to the brittle, brittle-ductile, and ductile responses of ice to gravity. It is a genuine glacial ice sheet but may be composed of two or more interbedded ices.

Hvidberg C. S. * Investigating Timescales for Closing Polar Troughs in the North Polar Cap on Mars by Flow [#1669] A simplified model of the North Polar Cap on Mars is used to explore how fast flow would close the polar troughs, and how much sublimation is required to keep them open. If troughs are formed by sublimation, the cap may be shrinking.

Pathare A. V. * Paige D. A. Turtle E. P. Hartmann W. K. Viscous Creep Relaxation of Impact Craters Within the Martian Polar Layered Deposits [#1972] Our finite-element simulations of impact craters within the Martian Polar Layered Deposits (PLD) indicate that viscous creep relaxation of dusty PLD ice is the resurfacing mechanism most consistent with both the size distribution and ubiquitous shallowness of PLD craters.

Fishbaugh K. E.* Head J. W. III Chasma Boreale and Related North Polar Deposits: New Insights into Mechanisms of Formation [#1428] New MOLA and MOC data are used to characterize Chasma Boreale and related north polar deposits and support a melting origin for the chasma.

Kreslavsky M.A.* Head J. W. III Conditions and Principal Time Scales for Basal Melting of Martian Polar Caps [#1779] We consider conditions and time scales for basal melting of polar deposits on Mars. We conclude that the basal melting cannot be caused by the primary obliquity oscillations, but could be related to long-term chaotic obliquity variations.

Milkovich S.M.* Head J. W. III Kreslavsky M.A. Variations in Layered Deposits at the North Pole of Mars: Stratigraphy Along a Single Trough and Evidence for C02 Loss [#1713] Polar layered terrain at high resolution reveals pits which may be the result of outgassing in a C02 rich layer. Correlation of layers is difficult due to surface frost deposits which can change the brightness and thickness of visible layers.

Soderblom L. A.* Kirk R. L. Herkenhoff K. E. Accurate Fine-Scale Topography for the Martian South Polar Region from Combining MOIA Profiles and MDC NA Images [#1254] MOLA profiles are used to calibrate MOC photoclinometric models to provide accurate topographic models at 1-to-10 meter scales.

68 ------33rd LPSC Program Titus T. N. * Kieffer H. H. A Comparison of the Mars South Polar Recession Rates Between 1999 and 2001 [#2071] The MGS TES monitored the recession of the south polar cap in 1997, 1999, and 2001. 1999 was a year free of global dust storms while 2001 had one of the largest observed global dust storms in observed Martian history. We compare the recession rates of the south polar cap between these two years.

Head J. W. III* The Hydrological Cycle in the Last 80% of Mars History: Sources, Locations, Residence Times, Stability, Duration and Evolution of H20 [#1724] Geological evidence indicates that the Mars hydrologic cycle has consisted of a globally continuous cryosphere for the last 80% of its history, with liquid water occasionally emerging to the surface during magmatic events that cracked the cryosphere.

Zent A. P.* The Fate of Water in Noachian and Hesparian Volcanic Plumes on Mars [#1750] The fate of volcanic water depends on uncertainties in nucleation and agglomeration in Martian volcanic plumes.

Lunine J. I.* Morbidelli A. Chambers J. E. Origin of Water on Mars [#1791] Dynamical simulations suggest that the Earth's water budget was delivered primarily from the asteroid belt, in the form of large planetary "embryos". The same simulations present a very different picture for Mars- its water came from a mixture of cometary and small asteroidal bodies.

Blaney D. L. * Using Mars's Sulfur Cycle to Constrain the Duration and Timing of Fluvial Processes [#1527] Sulfur exists in high abundances at diverse locations on Mars. This work uses knowledge of the Martian sulfate system to discriminate between leading hypotheses and discusses the implications for duration and timing . of fluvial processes.

33rd LPSC Program------69 Wednesday, March 13, 2002 MARS TECTONICS 8:30 a.m. Salon C

Chairs: M. P. Golombek F. Nimmo

Dohm J. M.* Maruyama S. Baker V. R. Anderson R. C. Ferris J. C. Hare T. M. Plate Tectonism on Early Mars: Diverse Geological and Geophysical Evidence [#1639] Mars has been modified by endogenic and exogenic processes similar in many ways to Earth. However, evidence of Mars' embryonic development is preserved because of low erosion rates and stagnant lid convective conditions since the Late Noachian. Early plate tectonism can explain such evidence.

Webb B. M.* Head J. W. III Noachian Tectonics of Syria Planum and the Thaumasia Plateau [#1358] Gravity controlled movement of the Thaumasia plateau to the southeast began in the Noachian and tapered off in the Early Hesperian. This movement was facilitated by a ductile lower crustal layer which developed south of the dichotomy boundary.

Watters T. R.* The Tectonics and Topography of the Dichotomy Boundary in the Eastern Hemisphere of Mars [#1692] One of most compelling and enduring questions about geologic evolution of Mars is the origin of the hemispheric dichotomy.

Smrekar S. E.* Raymond C. A. McGill G. E. Structure of the Dichotomy Boundary at 50-90E Revealed by Geologic Mapping and Gravity and Magnetic Data [#2068] In the 50-90E section of the dichotomy, the gravity and magentic fields correlate with a buried fault. These data will be used to infer fault slip and thickness of the magnetic layer.

Nimmo F.* Barnett D. Strength of Faults on Mars from MOLA Topography [#1169] We estimate the stresses present on faults for two Martian rifts ( -10 MPa). We conclude that Martian faults are no ·stronger than terrestrial ones, due to the presence of subsurface water.

Golombek M.P.* A Revision of Mars Seismicity from Suiface Faulting [#1244] The seismic moment release of Mars is estimated from slip on faults visible on the surface through time and calibrated by the number of marsquakes expected throughout the lithosphere. Results indicate Mars is presently seismically active and a promising prospect for future seismic investigations.

Schultz R. A.* How Much Tectonic Strain Should We See at Planetary Suifaces? Quantitative Bounds from Observations and Theory [#1064] Tectonic strain can be estimated from the displacement-length scaling relationships of faults in a population. For typical DIL, inhomogeneous extensional strains of 2-3% and contractional strains of 4-5% are expected.

Okubo C. H.* Schultz R. A. Fault Geometry Below Wrinkle Ridges Based on Slope Asymmetry and Implications for Mechanical Stratigraphy [#1708] Maps of subsurface mechanical stratigraphy are developed based on MOLA-derived quantitative determinations of fault orientations within wrinkle ridges.

70 33rd LPSC Program Tate A. Mueller K. J.* Golombek M.P. Kinematics and Structural Inversion of Wrinkle Ridges on Lunae and Solis Plana -Implications for the Early History ofTharsis [#1828] Mapping of Wrinkle Ridges on Lunae and Solis Plana suggest they form as fault-propagation folds above reactivated (inverted) thrust faults.

Grosfils E. B.* Schultz R. A. Kroeger G. Geophysical Constraints on Normal Fault Displacement in Devils Lane Graben, Canyonlands National Park, Utah [#1101] Here we present the final results from a shallow geophysical survey of Devils Lane graben and briefly consider the potential implications for fault scaling relationships and for regional strain calculations on other planets.

Wilkins S. J.* Schultz R. A. Possible Causes of Low-Angle Normal Fault Scarps at Tempe Terra [#1993] Normal fault scarps at Tempe Terra have much lower slopes ( <30°) than expected for faults forming in an Andersonian stress regime. We discuss three possible mechanisms responsible for forming fault scarp slopes <30°: low coefficients of friction, fault rotation, and scarp degradation.

Mege D.* Cook A. C. Garel E. Lagabrielle Y. Cormier M-H. Surface Collapse and Volcanic Rifting on Mars [#2042] Usual models of volcanic rifting on Earth appropriately characterize "narrow graben" tectonics and volcanism on Mars.

Lucchitta B. K. * Chapman M. G. Are the Valles Marineris Giant Volcano-Tectonic Depressions? [#1689] Investigation of MOC images of the Valles Marineris suggests that the interior layered deposits are volcanic. Thus, interior mesas may be volcanic edifices over eruptive centers, and the troughs are volcano-tectonic depressions.

33rd LPSC Program ------71 Wednesday, March 13, 2002 PRESOLAR GRAINS I 8:30 a.m. Marina Plaza Ballroom

Chairs: A. M. Davis D. D. Clayton

Nittler L. R. * Meteoritic Stardust and the Clumpiness of Galactic Chemical Evolution [#1650] We discuss a model of heterogeneous galactic chemical evolution. Although the model can explain presolar SiC Si isotopes, it fails to predict correlations between Si and Ti isotopes or the observed range of 0 isotopes in presolar oxide grains.

Clayton D. D.* Meyer B.S. The L-S. Iron Isotopic Diagnostics of Presolar Supernova Grains [#1021] We study the abundance and isotopic composition of iron in a massive-star supernova to identify those isotopic characteristics that can identify the location of the condensing matter that is contained in the presolar supernova grains from meteorites.

Tripa C. E.* Pellin M. J. Savina M. R. Davis A.M. Lewis R. S. Clayton R.N. Fe Isotopic Composition of Presolar SiC Mainstream Grains [#1975] Iron isotopic distribution was measured in SiC mainstream grains from the Murchison meteorite by time-of-flight resonance ionization mass spectrometry. All grains exhibit 54Fe depletions of -50%o to -200%o, lower than what are predicted by calculations of s-process nucleosynthesis in AGB stars.

Davis A.M.* Gallino R. Lugaro M. Tripa C. E. Savina M. R. Pellin M. J. Lewis R. S. Presolar Grains and the Nucleosynthesis of Iron Isotopes [#2018] The iron isotopic compositions of mainstream and Type X presolar SiC grains are compared with theoretical simulations of asymptotic giant branch stars and supernovae and with mixtures of various types of stellar ejecta.

Hoppe P. * Besmehn A. On the Origin ofTitanium-49 Excesses in Presolar Silicon Carbide Grains of Type X [#1310] The Ti-V isotopic systematics was investigated on 48 presolar SiC grains of type X. A correlation between Ti 49148Ti ratios and V /Ti ratios suggests grain formation on a timescale of several months.

Besmehn A.* Hoppe P. Homogeneous Distribution of Radiogenic Calcium-44 in Silicon Carbide X Grains from the Murchison Meteorite [#1297] The homogeneity of Si- and Ca-isotopic compositions was investigated with the NanoSIMS in 15 SiC X grains. Two grains contain radiogenic 44Ca which is homogeneously distributed within the grains on a spatial scale of >150 nm.

Amari S. * Jennings C. Nguyen A. Stadermann F. J. Zinner E. K. Lewis R. S. NanoSIMS Isotopic Analysis of Small Presolar SiC Grains from the Murchison and Indarch Meteorites [#1205] Carbon and N isotopic measurements were made with the NanoSIMS ion microprobe on small (0.25-0.6 p.m) presolar SiC grains from the Murchison and Indarch meteorites. Indarch also contains silicon nitride grains with the isotopic signature of mainstream SiC.

Savina M. R. * Tripa C. E. Pellin M. J. Davis A. M. Clayton R. N. Lewis R. S. Amari S. Isotopic Composition of Barium in Single Presolar Silicon Carbide Grains [#1962] We have measured Ba isotope distributions in individual presolar SiC grains. We find that the Ba isotopic composition in mainstream SiC grains is consistent with models of nucleosynthesis in low to intermediate mass asymptotic giant branch (AGB) stars.

72 ------33rd LPSC Program Jennings C. L. * Savina M. R. MessengerS. Amari S. Nichols R. H. Jr. Pellin M. J. Podosek F. A. Indarch SiC by TIMS, RIMS, and NanoSIMS [#1833] We have measured the Ba isotopic composition in Indarch SiC (separates and individual grains) by TIMS, RIMS and nanoSIMS.

Speck A. K. ": Hofmeister A. M. Processing of Presolar Grains Around Post-AGB Stars: Silicon Carbide as the Carrier of the "21" Micron Feature [#1155] New laboratory data indicate that SiC (cubic or nano crystals) produces the emission features observed near 21 microns from post-agb stars. The cold temperature ofthe dust filters out the main peak. This assignment lacks the problems associated with previous attributions.

Nollett K. M.* Busso M. Wasserburg G. J. Cool Bottom Processing on the AGB and Presolar Grain Compositions [#1385] We describe results from a model of cool bottom processing in AGB stars. We predict 0, AI, C and N isotopic compositions of circumstellar grains. Measured compositions of mainstream SiC grains and many oxide grains are consistent with CBP.

Zinner E. K. * AmariS. Lewis R. S. Presolar Spinel Grains Found in Fine-grained Residue from the Murray CM2 Carbonaceous Chondrite [#1207] Oxygen isotopic ratios were measured in 328 small (0.1-0.2 JJ.m) spinel grains from Murray with the NanoSIMS ion microprobe. At least six of them are of presolar origin, a much higher fraction than observed in larger spinel grains from Tieschitz.

Krestina N.* Hsu W. Wasserburg G. J. Circumstellar Oxide Grains in Ordinary Chondrites and Their Origin [#1425] Three new circumstellar hibonite and 14 circumstellar corundum grains have been found based on their highly anomalous oxygen. Al-Mg isot9pes have been measured for these circumstellar oxides and for 14 oxides with a "normal" oxygen composition.

33rd LPSC Program ------73 Wednesday, March 13, 2002 NRC DECADAL SURVEY TOWN HALL MEETING 12:30-1:30 p.m. Salon B

Chairs: M. J. Belton C. Hartman

Based on a request from NASA Headquarters, the NRC is pursuing a Decadal Survey of Solar System Exploration. Four survey panels (inner planets, giant planets, primitive bodies, and large satellites) have been holding meetings across the country, and the steering group is charged with providing (1) a "big picture" of solar system exploration, what it is, how it fits into other scientific endeavors, and why it is a compelling goal today; (2) a broad survey of the current state of knowledge of the solar system today; (3) an inventory of the top-level scientific questions that should provide a focus for solar system exploration today; and finally, (4) a prioritized list of the most promising avenues for flight investigations and supporting groundbased activities. Two other NRC groups are providing inputs to the survey on Mars exploration and Astrobiology research. Members of the panels will discuss the status and direction of the survey and some of the scientific questions that the panels consider as key. This will be the last public meeting of the survey before it concludes its work and comments from the floor are encouraged.

74 ------33rd LPSC Program Wednesday, March 13, 2002 MARS MAGNETICS AND GRAVITY, PLUS MERCURY 1:30 p.m. Salon A

Chairs: D. L. Mitchell J. K.Harmon

Mitchell D. L. * Lin R. P. Reme H. Cloutier P. A Connerney J. E. P. Acuna M. H. Ness N. F. Probing Mars' Crustal Magnetic Field and Ionosphere with the MGS Electron Reflectometer [#2029] MGS Electron Reflectometer data are used to probe the shape and variability of Mars' ionosphere and to identify weak crustal magnetic fields within the Hellas basin.

Hutchison W. E.* Zuber M. T. Power Spectral Characterization of the Magnetic Field of Mars and Spatial Correlation with Crustal Thickness [#1588] We characterize the present-day remanent magnetic field of Mars in terms of its power spectral character, and compare magnetic intensity to Martian crustal structure.

Voorhies C. V.* Sabaka T. J. Purucker M. Magnetic Spectra of Earth and Mars [#1924] The spectral method for distinguishing crustal from core-source magnetic fields has been re-examined, modified, and applied to both a comprehensive geomagnetic field model and an altitude normalized magnetic map of Mars.

Hood L. L. * Richmond N. C. Halekas J. The Global Distribution of Martian Crustal Magnetic Fields: Interpretation and Implications [#1125] The concentration of magnetic anomalies in the SH near 180 W may represent a surviving remnant of the early Noachian crust that escaped shock demagnetization by later basin-forming impacts and thermal demagnetization by the northern resurfacing event. .

Purucker M.* Why are Some Martian Terranes Strongly Magnetic and Some Non-Magnetic? [#1936] The southern boundaries of the strongly magnetic Cimmeria/Sirenum region in Mars' southern hemisphere are abrupt and characteristic of fault boundaries. The large non-magnetic region centered in Noachis Terra may host additional unrecognized large impact craters or thermal events.

Zuber M. T.* Smith D. E. Rotational Dynamics and Time-variable Gravity of Mars and Implications for Volatile Cycling and Atmospheric Structure [#1925] The seasonal motion of atmospheric material, its deposition and sublimation at the poles, represent a minute redistribution of the planet's mass which has been detected in the motion of the MGS spacecraft. These observations have enabled us to estimate the quantity of material involved.

Zhong S. J.* On the Origin of Gravity and Topography Anomalies of the Tharsis Rise on Mars [#1812] We seek to distinguish between two competing models for the origin of the topography and gravity anomalies for the Tharsis rise: the mantle plume and surface volcanic construction.

Kiefer W. S.* Gravity Anomalies at Large Martian Volcanos: Syrtis Major and Apollinaris Patera [#1464] Gravity models for Syrtis Major and Apollinaris Patera constrain the crustal and lithospheric structure in these regions of Mars.

33rd LPSC Program------75 McGovern P. J.* Interpretations of Gravity Anomalies at Olympus Mons, Mars: Intrusions, Impact Basins, and Troughs [#2024] New high-resolution gravity and topography data from the Mars Global Surveyor (MGS) mission allow a re-examination of compensation and subsurface structure models in the vicinity of Olympus Mons.

Bills B. G.* Tidal Dissipation in Mercury [#1599] The spatial pattern and total inventory of tidal dissipation within Mercury depends sensitively on internal structure 2 and on orbital eccentricity. Surface heat flow from this source may exceed 3 mW/m- , and will vary with time as the orbital eccentricity fluctuates.

Holin I. V.* Earth-based US Opportunities to Solve the Problem of Mercury's Obliquity and Librations in May-June 2002 [#1387] It is shown that the problem of both Mercury's obliquity and physicallibrations can be solved near the inferior conjunction in May-June 2002 by Earth-based US radar facilities.

Harmon J. K.* Campbell D. B. Mercury Radar Imaging at Arecibo in 2001 [#1858] We report results from radar imaging observations of Mercury made with the Arecibo S-band radar in the summer of 2001. The images cover both the Mariner-imaged and Mariner-unimaged hemispheres.

Black G. J.* Campbell D. B. Harmon J. K. New 70-cm Wavelength Radar Images of Mercury's North Polar Region [#1946] New radar imaging of Mercury at 70 em wavelength has mapped the high reflectivity regions at Mercury's north pole with a resolution of approximately 150 km. The enhanced backscatter seen at shorter wavelengths is also seen at 70 em wavelength.

76 ______33rd LPSC Program Wednesday, March 13, 2002 ASTROBIOLOGY: "42" 1:30 p.m. Salon B

Chairs: F. Westall J. Schieber

Allen C. C.* Grasby S. E. Longazo T. G. Lisle J. T. Beauchamp B. Life Beneath the Ice- Earth(!) Mars (?)Europa ( ?) [#1134] Life exists in subsurface refuges despite surface temperatures <0°C (analogs Snowball Earth, Mars, Europa). Water discharged from such refuges brings to the surface living microbes, as well as mineralogical/isotopic indications of subsurface life.

Westall F.* Why Potential Early Life on Mars Was Likely to Have Been Spatially Limited as Well as Heterogenous [#1071] On early Mars the lack of widespread surface water would have meant evolution of potential life in isolated niches and environmental deterioration either stimulated adaptation to adversity or killed life off. In contrast, early life on Earth was widespread and relatively homogenous.

Varnes E. S.* Jakosky B. M. Potential Chemosynthetic Energy Yields from Martian Hydrothermal Systems [#1398] Energy may limit the occurence of life on Mars. We have developed geochemical models of martian hydrothermal systems. From these, we have calculated energy yields of reactions that may be important for the metabolism of putative martian organisms.

Morris P. A.* Wentworth S. J. Byrne M. Brigmon R. Allen C. C. McKay D. S. Terrestrial Evaporite Environments: Potential Analogs for Mars [#1788] Terrestrial evaporite biota can help us understand microbial fossilization processes in extreme environments and serve as a basis for interpreting some Mars meteorites and Mars sample return rocks. Two terrestrial evaporite systems are compared.

Mendez A.* Habitability of Near-Suiface Environments on Mars [#1999] A model based on environmental biophysics, the potential characteristics of some martian microenvironment, and the microbial biodiversity is used to estimate the suitability for microbial growth of ice-rich surfaces on the present Mars environment.

Fernandez Remolar D.* Amils R. Morris R. V. Knoll A. H. The Tinto River Basin: An Analog for Meridiani Hematite Formation on Mars? [#1226] Sedimentological, petrological, XRD and Moessbauer analyses of modern and Pleistocene iron deposits along the Rio Tinto, southwestern Spain, provide perspectives on depositional process and diagenesis that may be relevant to investigations of sedimentary hematite on Mars.

Brasier M.D.* Green O. R. Steele A. Van Kranendonk M. Jephcoat A. P. Kleppe A. K. Lindsay J. F. Grassineau N. V. Archaean Cyanobacteria, Ghosts in the Machine? [#1614] The question of Cyanobacteria in the Apex chert of Australia is addressed and the results of indepth microscopy, isotope and elemental analysis as well as detailed geological mapping are presented. The microfossils seen in this formation are shown to be pseudofossils.

33rd LPSC Program------77 Probst L. W. * Allen C. C. Thomas-Keprta K. L. Clemett S. J. Longazo T. G. Nelman-Gonzalez M.A. Sams C. Desert Varnish- Preservation of Biofabrics and Implications for Mars [#1764] Preliminary data suggest that biofabrics are preserved by Mn and Fe minerals (birnessite and hematite) in desert varnish. A martian hematite-rich deposit with indications of biological activity may prove to be a prime site for future sample return.

Toporski J.* Steele A. Westall F. Thomas-Keprta K. L. McKay D. S. Bacterial Silicification and Its Relevance in Astrobiological Research [#1036] Silicified bacteria are the earliest evidence of life on Earth. If life evolved on Mars or Europa, its traces may have been silicified. Detailed knowledge on silicification therefore helps refine our search parameters for extraterrestrial life.

Schieber J. * Arnott H. J. Coviello M. Various Occurrences of Potential Microbial Fossils in Mudstones and Investigations into Bacterial Taphonomy [#1089] Potential microbial fossils in mudstones are associated with early diagenetic mineralization (silica, pyrite, etc.). To interpret these features we need to understand the varied preservation potentials of microbes and microbial communities.

Longazo T. G.* Wentworth S. J. Southam G. McKay D. S. Microbial Weathering of Olivine [#1985] Controlled microbial weathering of olivine experiments displays a unique style of nanoetching caused by biofilm attachment to mineral surfaces. We are investigating whether the morphology of biotic nanoetching can be used as a biosignature.

BlankJ. G.* Knize M.G. Nakafuji G. Laboratory Studies of Shock-induced Amino Acid Polymerization and Implications for Extraterrestrial Delivery and Impact-generated Production of Biomolecules [#2075] We performed light-gas-gun shock experiments using aqueous solutions of amino acids to mimic comet-Earth collisions in the laboratory. Amino acid survival and polymerization will be discussed in the context of the role of exogenous delivery ofbiomolecules to the early Earth.

Nuth J. A. III* Hill H. G. M. Amorphous Silicate Smokes as Catalysts for the Production of Complex Organic Species in the Primitive Solar Nebula [#1814] . Amorphous Mg-silicates are excellent Fischer-Tropsch catalysts that convert Hz and CO into hydrocarbons almost as well as Fe-silicates. Mg-silicates do not catalyze formation of ammonia. N is incorporated into the organics if CO, Nz and Hz are used.

78 33rd LPSC Program Wednesday, March 13, 2002 BORRELLY AND EROS 1:30 p.m. Salon C

Chairs: M. E. Zolensky R. M. Nelson

Nelson R. M.* Rayman M.D. Soderblom L.A. Young D. T. The Deep Space One Flyby of the Comet Borrelly [#1375] On 22 Sep 2001 the Deep Space One encountered the Comet 19!P Borrelly. The nucleus was imaged at a resolution of 48m, the highest resolution ever obtained of a cometary nucleus. The science results of the mission will be presented in this and follow on papers.

Soderblom L.A.* BeckerT. L. Bennett G. Boice D. C. Britt D. T. Brown R. H. Buratti B. J. Isbell C. Giese B. Hare T. Hicks M.D. Howington-Kraus E. Kirk R. L. Lee M. Nelson R. M. Oberst J. Owen T. Sandel B. R. SternS. A. Thomas N. YelleR. V. Encounter with Comet 19P!Borrelly: Results from the Deep Space 1 Miniature Integrated Camera and Spectrometer [#1256] Deep Space 1 images and spectra of Comet 19P/Borrelly reveal two distinct classes of dust jets; a hot, dry, red-sloped IR spectrum; and a geologically complex nucleus.

Young D. T.* Crary F. J. Nordholt J. F. Hanley J. J. Burch J. L. McComas D. J. Goldstein R. BoiGe D. Weins R. C. Lawrence D. R. Eviatar A. Sauer K. [INVITED] Composition of the Plasma Within the Coma of Comet 19P!Borrelly

Boice D. C.* Britt D. T. Nelson R. M. Sandel B. R. Soderblom L.A. Thomas N. YelleR. V. The Near-Nucleus Environment of 19P!Borrelly During the Deep Space One Encounter [#1810] Images from the DSl spacecraft reveal complex dust structures near the nucleus of comet Borrelly. Initial analyses confirm the importance of effects from extended active sources as well as dust acceleration and fragmentation.

BrittD.T.* BoiceD.C BurattiB.J. HicksM.D. NelsonR.M. OberstJ. SandelB.R. SoderblomL.A. Stern S. A. Thomas N. The Geology of Comet 19/P Borrelly [#1686] The Deep Space One spacecraft flew by Comet 19P/Borrelly on September 22, 2001 and returned a rich array of imagery with resolutions of up to 48 rnlpixel. These images provide a window into the surface structure, processes, and geological history of a comet.

Oberst J.* Giese B. Soderblom L. DSl Science Team The Nucleus of Comet Borrelly: A Study of Morphology and Swface Brightness [#1716] A Digital Terrain Model of the nucleus of comet Borrelly is used to study illumination and albedo effects of surface materials.

Reisenfeld D. B.* Nordholt J. E. Crary F. Delapp D. M. Elphic R. C. Funsten H. O. Gary S. P. Goldstein R. Hanley J. J. Lawrence D. J. Shappirio M. Steinberg J. T. Wang J. Wiens R. C .. Young D. T. Deep Space 1 Encounter with Comet Borrelly: Composition Measurements by the PEPE Ion Mass Spectrometer [#1840] The Plasma Experiment for Plasma Exploration (PEPE) observed the plasma environment of Comet Borrelly during the flyby of the Deep Space 1 spacecraft on 22 September 2001. The observe ion species and their abundances will be reported.

33rd LPSC Program TrombkaJ.I.* StarrR.D. NittlerL.R. EvansL.G. McCoyT.J. BoyntonW.V. BurbineT.H. BriicknerJ. · Gorenstein P. Squyres S. W. Reedy R. C. Goldsten J. O. Lim L. Hurley K. Clark P. E. FloydS. R. McClanahan T. P. McCartney E. Branscomb J. Bhangoo J. S. Mikheeva I. Murphy M. E. The NEAR-Shoemaker XGRS Experiment: An End of Mission Overview [#1340] An overview of the results from the NEAR-Shoemaker remote sensing X-Ray/Gamma-Ray Spectrometer experiment for more than a year of operation in orbit and on the surface of 433 Eros.

Starr R. D.* Nittler L. R. Lim L. McCoy T. J. Burbine T . .H. HoG. C. Trombka J. I. The NEAR-Shoemaker X-Ray Spectrometer: Latest Results and Future Analysis Plans [#1499] The NEAR XRS observed the asteroid 433 Eros in low orbit for nearly six months. Elemental ratios are most consistent with a primitive chondrite and give no evidence of global differentiation. Further analysis of this large data set will continue.

Evans L. G.* Trombka J. I. Starr R. D. Boynton W. V. BrUckner J. Reedy R. C. McCoy T. J. Elemental Composition Results for the NEAR-Shoemaker Gamma-Ray Spectrometer [#1631] Elemental composition results for the surface measurements on 433 Eros by the NEAR gamma-ray spectrometer are reviewed. Extension of the elemental composition results to the whole asteroid using orbital gamma-ray measurements will be considered.

Cheng A. F.* Barnouin-Jha O. Smith D. E. Zuber M. T. Shape, Topography and Roughness of 433 Eros [#1522] A global topographic map of Eros shows that Himeros and Shoemaker Region are giant craters. The slope distributions as inferred from tracks and as inferred from surface elements are distinct, and the former is Gaussian at small slopes.

Zolensky M. E.* Nakamura K. Cheng A. F. Cintala M. J. Horz F. Morris R. V. Criswell D. Meteoritic Evidence for the Mechanism of Pond Formation on Asteroid Eros [#1593] We propose seismic shaking as the mechanism for pond formation on Eros, based on analysis of clasts in the Vigarano CV chondrite which appear to have formed in this way.

Kareev M.S.* Sears D. W. G. Benoit P. H. Thompson J. Jansma P. Mattioli G. Laboratory Simulation Experiments and the Ponds on Asteroid 433 Eros [#1610] Based upon the simulation of the ponds on Eros we offered possible formation mechanism. We suggest that surface out-gassing and evaporation of water/ice from newly formed craters might play a significant role in fluidization and grain size sorting.

80 ------33rd LPSC Program Wednesday, March 13, 2002 PRESOLAR GRAINS II 1:30 p.m. Marina Plaza Ballroom

Chairs: T. L. Daulton T. J. Bernatowicz

Meshik A. P.* Pravdivtseva O. V. Hohenberg C. M. Nanodiamond in Colloidal Suspension: Electrophoresis; Other Observations [#2011] Selective laser extraction has demonstrated that meteoritic diamonds may consist of subpopulations with different optical absorption properties, but it is not clear what makes them optically different. More work is needed to understand the mechanism for selective laser extraction.

Stadermann F. J. * Bernatowicz T. Croat T. K. Zinner E. K. MessengerS. Amari S. Presolar Graphite in the NanoSIMS: A Detailed Look at the Isotopic Makeup of the Spherule and Its Sub-Components [#1796] The new NanoSIMS allows isotopic measurements directly in TEM thin sections. We find that it is possible to analyze internal isotopic gradients in presolar graphite spherules and to determine the isotopic compositions of internal TiC crystals.

Croat K.* Bernatowicz T. Stadermann F. J. MessengerS. Amari S. Coordinated Isotopic and TEM Studies of a Supernova Graphite [#1315] This work is a continuation of our study of presolar graphite spherules from supernovae. We report the results of a combined isotopic and transmission electron microscope (TEM) study of an unusually large (12 rnrn diameter) presolar graphite spherule from the Murchison (CM2) density separate KE3.

Stroud R. M. * O'Grady M. Nittler L. R. Alexander C. M. O'D. Transmission Electron Microscopy of an In Situ Presolar Silicon Carbide Grain [#1785] We used a focused ion beam workstation to prepare ultra-thin sections of a presolar SiC grain. Our TEM studies indicate that the SiC formed by rapid vapor-phase condensation, trapping pre-existing graphite grains in random orientations.

Daulton T. L. * Bernatowicz T. J. Lewis R. S. MessengerS. Stadermann F. J. Amari S. Polytype Distribution in Presolar SiC: Microstructural Characterization by Transmission Electron Microscopy [#1127] In the laboratory, SiC is known to form as hundreds of different polytypes and the formation of a particular polytype is sensitive to growth conditions. TEM is used to determine the polytype distribution-of presolar SiC, isolated from Murchison.

Kashiv Y.* Cai Z. Lai B. SuttonS. R. Lewis R. S. Davis A.M. Clayton R.N. Pellin M. J. Condensation of Trace Elements into Presolar SiC Stardust Grains [#2056] We measured concentrations oftrace elements in 34 individual presolar SiC grains by SXRF. There are four patterns: 1. enriched non-s-elements; 2. depleted non-s-elements; 3. depleted s-elements; 4. enriched s-elements. The data indicate condensation in solid solution.

33rd LPSC 81 Wednesday, March 13, 2002 MARS REMOTE SENSING AND SURFACE SCIENCE 3:00 p.m. Marina Plaza Ballroom

Chairs: J. L. Bishop W. M. Calvin

Neumann G. A.* Abshire J. B. Smith D. E. Sun X. Zuber M. T. MOLA 1064nm Radiometry Measurements: Status and Prospects in Extended Mission [#1889] The MOLA instrument has measured the brightness of the Mars surface at 1064 nm in a passive mode, from background noise counts, since 1997. After ceasing altimetry collection July 2001, MOLA has taken >50 million high-resolution radiometer observations.

MorrisR.V.* BellJ.F.III FarrandW.H. WolffM.J. Constraints on Martian Global Surface Mineralogical Composition, Albedo, and Thermal Inertia from Hubble Space Telescope Extended-Visible Multispectral Data [#1913] We are using 12-band (255 to 1042 nm) multispectral data of Mars from observations made by the Hubble Space Telescope (HST) in 1999 (L,- 130°) to globally map mineralogical compositions and albedo at spatial scales of -20 to 50 km/pixel.

Bishop J. L. * Rock Coatings and Alteration Rinds; How They Might Form on Mars and What They Can Tell Us [#1170] Spectral analyses of Mars soil analogues, cementation processes, and rock coatings formed under a variety of conditions are underway in this study in order to gain information about the composition and formation mechanisms of rock coatings on Mars.

Calvin W. M.* Fallacaro A. Hamilton V. E. Alternative Alteration Pathways at Mars and Dark Mineral Analogs [#1154] We explore the nature and spectral properties of a number of dark alteration minerals formed in low-temperature and low-oxygen environments. Compatibility with TES and IMP data will be presented as well as linear mixtures of carbonaceous chondrite spectra.

Thomson B. J.* Schultz P. H. Mid-Infrared Spectra ofArgentine Impact Melts: Implications for Mars [#1595] We have analyzed a suite of impact glass samples from the loessoid terrain of Argentina using mid-IR spectroscopy. Our results are consistent with the idea that the TES Type 2 surface contains a significant component of impact-generated glass.

Bish D. L.* Vaniman D. T. Chipera S. J. Carey J. W. Properties of Potential Martian Minerals Under Simulated Surface Conditions [#1895] Experimental X-ray diffraction and thermal data for candidate Martian surface minerals, such as smectites and zeolites, show that residual structural water is held very tightly and may remain under low water-vapor pressure conditions.

Yen A. S.* Unusual Reactivity of the Martian Soil: Oxygen Release Upon Humidification [#1760] Recent lab results show that oxygen evolves from superoxide-coated mineral grains upon exposure to water vapor.

This observation is additional support of the hypothesis that UV -generated 0 2- is responsible for the reactivity of the martian soil.

82 ------33rd LPSC Program Wednesday, March 13, 2002 NASA PROGRAM MANAGER'S BRIEFING 5:00 p.m. Salon B

Chair: J. B. Garvin

Discussion of current NASA research opportunities, status of various programs within the Solar System Exploration Division, and employment opportunities within NASA Headquarters to support these programs.

33rd LPSC Program------83 Thursday, March 14, 2002 EUROPA'S ICY SHELL GAME 8:30 a.m. Salon A

Chairs: L. M. Prockter W. B. McKinnon

Sarid A. R. * Greenberg R. Hoppa G. V. Tufts B. R. Geissler P. Polar Wander on Europa: Results from a Survey of Strike-Slip Faults [#1879] A survey of strike-slip faults on Europa, compared with the tidal walking theory, provides evidence for polar wander.

Patterson G. W.* Pappalardo R. T. Compression Across Ridges on Europa [#1681] We present evidence that compression has occurred along doublet ridges on Europa, a model proposed, but not previously demonstrated.

Mevel L. Mercier E.* Geodynamics on Europa: Evidence for a Crustal Resorption Process [#1476] A reconstruction of the surface anterior to Astypalaea Linea's emplacement (feature where crust is created) reveals a weakly localized crust resorption in the surrounding ancient terrains. Physical processes invoked for disappearance are discussed.

Leake M. A.* Greenberg R. Hoppa G. V. Tufts B. R. A Survey of Pits and Uplift Features on Europa [#1891] A survey of pits and uplift features on Europa shows that numbers rapidly increase with decreasing size, few uplifts are round or cracked, and population symmetry patterns are oblique to the equator.

Spaun N. A.* Head J. W. III Pappalardo R. T. The Spacing Distances of Chaos and Lenticulae on Europa [#1723] We performed a nearest neighbor spacing distance analysis of chaos and lenticulae on Europa and found a dominant spacing of 16-36 km exists, suggesting a convecting layer 7-18 km thick.

Schenk P. M. Pappalardo R. T. * Stereo and Photoclinometric Topography of Chaos and Anarchy on Europa: Evidence for Diapiric Origins [#2035] Topography of chaos is variable and frequently elevated above surrounding plains, supporting diapiric models for their origin.

Turtle E. P.* Ivanov B. A. Numerical Simulations of Impact Crater Excavation and Collapse on Europa: Implications for Ice Thickness [#1431] The presence of central peak craters on Europa implies that the impacts that created them did not penetrate to a liquid water layer. We present the implications of numerical simulations of impact cratering on Europa for the thickness of an ice shell.

Schenk P.M.* Impact Through the Layered Icy Crusts of Europa, Ganymede and Callisto: Or, I Know How Thick Europa's Ice Shell is (Maybe)! [#1974] Crater depth/diameter measurements on the Galilean Satellites offer a rare slice through their icy crusts.

84 ------~------33rd LPSC Program Barr A. C.* Nimmo F. Pappalardo R. T. Gaidos E. Shear Heating and Solid-State Convection: Implications for Astrobiology [#1545] Radiation-modified ice, a source of nutrients for life, formed at Europa's surface can reach the sub-surface ocean in 107 years through the coupled processes of drainage of melt generated by shear heating along faults and solid-state convection.

Schmidt K. G.* Dahl-Jensen D. Ice Crystal Growth in Europa's Ice Shell [#1469] A simple model for ice crystal growth in the ice shell of Europa has been made. The model suggests that ice crystals can become large in the upper parts of the ice shell: 0.5-40 m across.

Melosh H. J.* Ekholm A. G. Showman A. P. Lorenz R. D. Is Europa's Subsurface Water Ocean Warm? [#1824] Europa's subsurface water ocean may be warm: that is, at the temperature of water's maximum density. This provides a natural explanation of chaos melt-through events and leads to a correct estimate of the age of its surface.

Zolotov M. Yu. * Shock E. L. The Speciation of Sulfur in an Ocean on Europa [#1531] Stability of native sulfur, iron sulfides, and aqueous sulfur compounds is evaluated at assumed P-T conditions of the Europa's ocean floor. Pyrite, gypsum, and ferric hydroxides can coexist in contact with sulfate-rich oceanic water.

Dalton J. B. * Detectability of Potentially Entrained Microorganisms at the Surface of Europa [#1555] New spectral measurements of bacteria taken at cryogenic temperatures provide insights on the surface composition of Europa as well as the detectability of microbes on the surface.

33rd LPSC Program ------85 Thursday, March 14, 2002 MARTIAN GULLIES AND MASS FLOW 8:30 a.m. Salon B

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

Paige D. A.* Near-Surface Liquid Water on Mars [#2049] A new detailed model shows that recently-discovered water seepage and runoff features on Mars can be explained by the melting of near-surface water ice during periods of high obliquity.

Gilmore M. S. * Phillips E. L. Geologic Control of Gully Depths in Three Regions of Mars [#1295] We show that 1) gullies emanate from a specific, competent layer, even when the layer is disrupted and 2) the depth of the gullies is positively correlated to geologic unit.

Burt D. M.* Knauth L. P. Klonowski S. Dense Eutectic Brines on Mars: They Could be Both Common and Ca-rich [#1240] The recent observation of young gullies apparently related to seepage of liquid water on Mars has raised the question of whether the fluids responsible might be concentrated brines. Such brines are to be expected. as a natural consequence of the history of Mars.

Cabrol N. A* Grin E. A The Recent Mars Global Warming (MGW) and/or South Pole Advance (SPA) Hypothesis: Global Geological Evidence and Reasons Why Gullies Could Still pe Forming Today [#1058] Hundreds of modern striped valleys, rock glaciers, debris-covered glaciers, and cryokarstic features localized in a strict latitude/altitude domain show a clear morphological and environmental continuum best explained by a recent climate change.

Lee P. * McKay C. P. Matthews J. Gullies on Mars: Clues to Their Formation Timescale from Possible Analogs from Devon Island, Nunavut, Arctic Canada [#2050] The origin and evolution of the youthful gully features on Mars remain enigmatic. Field investigations of possible analogs from Devon Island, Arctic, suggest that the terrestrial features are <104 years old and result from melting of surface ice.

Reiss D.* Jaumann R. Spring Defrosting in the Russell Crater Dune Field- Recent Surface Runoff Within the Last Martian Year? [#2013] Rill erosion on a dune slope in the Russell Crater dune field was detected on a high resolution Mars Orbiter Camera NA-image. The observation indicates that the extremely fresh appearing erosion is caused by recent surface runoff within the last Martian year.

Mangold N.* Costard F. Forget F. Peulvast J-P. Narrow Gullies over High Sand Dunes on Mars: Evidence for Flows Triggered by Liquid Water Near Surface [#1215] Recent gullies have been detected on MOC images of the flanks of large dunes at mid latitudes of Mars. Their formation is likely due to flows involving liquid water coming from the melting of near-surface ice during a recent period of high obliquity.

86 ------33rd LPSC Program Hartmann W. K.* Thorsteinsson T. Sigurdsson F. Comparison of Icelandic and Martian Hillside Gullies [#1904] Striking similarities exist between hillside gullies on Mars and in Iceland. A sequence of erosional forms is found in both cases, in which talus slopes are progressively dissected. Liquid water is a likely common denominator.

Tanaka K. L,* Skinner J. A. Hare T. M. Joyal T. Wenker A. Reswfacing of the Northern Plains of Mars by Shallow Subsurface, Volatile-driven Activity [#1406] Geologic mapping of the northern plains of Mars indicates that the primary mechanisms of their latest resurfacing involve periglacial-like deformation and local discharge of subsurface volatiles; evidence for large bodies of water or widespread volcanic resurfacing is not found.

Bulmer M. H.* Glaze L. Barnouin-Jha O. Murphy W. Neumann G. Modelling Mass Movements for Planetary Studies [#1533] Use of an empirical model in conjunction with data from the Chaos Jumbles rock avalanches constrain to first order their flow behavior, and provide a method to interpret rock/debris avalanche emplacement on Mars.

Williams R. M. E.* Malin M. C. Edgett K. S. Possible Late-Stage Mudflows in Kasei Valles [#1807] Platy suface morphology observed in high resolution MOC images ofKasei Valles has material properties consistent with emplacement via mudflows.

Skilling I. P.* Chapman M.G. Lucchitta B. K. Young, Blocky Flows in East Ius/West Melas and West Candor Chasmata, Mars: Debris Avalanche Deposits Derived from Interior Layered Deposit ( ILD) Mounds? [#1361] Several blocky flow deposits occur on the flanks of ILD mounds and on the floor of Valles Marineris in the East Ius/West Melas and Candor Chasmata area of Mars. The deposits are interpreted as debris avalanche deposits, and the blocks may represent wind-eroded debris avalanche hummocks.

Rice J. W. Jr.* Parker T. J. Russell A. J. Knudsen O. Morphology of Fresh Outflow Channel Deposits on Mars [#2026] We interpret the channel surface of Athabasca and Marte Valles to be fresh former ice-rich fluvial (hyperconcentrated) deposits rather than volcanic flows. Simply stated, this is what a fresh outflow channel deposit would look like.

33rd LPSC Program 87 Thursday, March 14, 2002 MARS: HISTORY, CRUST, AND MANTLE 8:30 a.m. Salon C

Chairs: V. R. Baker D. L. Turcotte

Baker V. R.* Maruyama S. Dohm J. M. A Theory for the Geological Evolution of Mars and Related Synthesis (GEOMARS) [#1586] Terrestrial planets should evolve through various modes of mantle convection, including magma ocean, plate tectonic, and stagnant lid convective processes. We report on a theory (GEOMARS) that shows how these processes explain the geophysical character and geological history of Mars:

SolomonS. C.* Aharonson O. Aurnou J. M. Banerdt W. B. Carr M. H. Dombard A. J. Frey H. V. Golombek M. P. Hauck S. A. II Head J. W. III Hutchison W. E. Jakosky B. M. Johnson C. L. McGovern P. J. Neumann G. A Phillips R. J. Richards M. A Smith D. E. Zuber M. T. Insights into the Earliest History of Mars: A New Synthesis [#1687] Motivated by the latest data from Mars Global Surveyor and from recent analyses of Martian meteorites, we offer a new synthesis of the relative timing of major events in the early geological history of Mars together with associated uncertainties.

Sotin C.* Head J. W. III Parmentier E. M. Models of Mars Early Evolution: Formation ofTharsis and Cessation of the Magnetic Field [#1922] Thermal evolution models at the core-mantle boundary of Mars are described. They predict the formation of a single plume which could have generated Tharsis. They also predict a dynamo very active during a very short period of time before the onset of convection.

Zaranek S. E.* Parmentier E. M. Convective Cooling of an Initially Stable Stratified Fluid: Implications for Martian Planetary Evolution [#1580] Simple scaling laws and parameterizations for convective cooling of a stably stratified fluid have been developed and applied to understanding the possible planetary evolution of Mars.

SchottB.* vandenBergA.P. Yuen D. A Slow Secular Cooling and Long Lived Volcanism on Mars, Explained [#1285] We use thermo-chemical convection models including partial melting to demonstrate that focussed persistent volcanism can occur on Mars. Our results provide an explanation for the existence and longevity of a single giant volcanic complex on Mars.

Arkani-Hamed J.* Reindler L. Stress Differences in the Martian Interior: Constraints on the Thermal State of Mars [#1567] Using the elastic thick shell model the stress differences determined in the martian mantle are about 100 MPa at a 100 depth and about 60-70 MPa in the upper 300 km. To sustain these stresses a temperature of 730C is required at 100 km depth and about 800C at 300 depth.

Parmentier E. M.* Zuber M. T. Preservation of Crustal Thickness Variations on Mars: Mantle Compositional Stratification or Hydrothermal Crustal Cooling? [#1737] Preservation of ancient crustal thickness variations on Mars suggests that stable mantle stratification has reduced heat flux from the mantle or hydrothermal convection has cooled the crust.

88 ------33rd LPSC Program Turcotte D. L.* Shcherbakov R. Is the Martian Crust also the Martian Elastic Lithosphere? [#1001] Correlations between topography, gravity, and areoid on Mars are used to constrain the crustal and lithospheric thicknesses on the planet.

Smith D. E.* Zuber M. T. The Crustal Thickness of Mars: Accuracy and Resolution [#1893] The accuracy of the most recent crustal thickness models of Mars is investigated along with their resolution. Evidence is presented of noise-like features in the maps and spectra that suggest the basic data only represent features down to resolutions of about 300 to 600 km.

McSween H. Y. Jr.* Basalt or Andesite? A Critical Evaluation of Constraints on the Composition of the Ancient Martian Crust [#1062] Reinterpretation of spectral and chemical data supporting the identification of andesite, and consideration of other constraints from analyzed surface fines, a crustal assimilant in shergottites, and crustal density, suggest that the Noachian martian crust is basaltic in composition.

Jacobsen S. B.* Yin Q-Z. The Mean Age of Mantle and Crustal Reservoirs for the Planet Mars [#1940] Based on all available isotopic and trace element data for SNCs we obtain a mean age of formation of the crust on Mars of -3.4 ± 0.6 Ga.

Dreibus G.* Jagoutz E. Radiogenic Isotopes and Bulk Composition of Mars [#1040] The Sm-Nd-, Rb-Sr- and Pb-Pb-isotope systematics of SNCs reveal the time scale for the chemical evolution of the Martian mantle. In addition, an observed correlation of Sr-isotopes with Ph-isotopes in SNCs permits to estimate the Pb abundance for the Martian mantle.

McLennan S.M.* Fractionation Among Large-Ion Lithophile Elements During the Differentiation of Mars: Implications for the Composition of the Martian Primitive Mantle [#1280] Basaltic shergottites exhibit a systematic decrease in KITh, KJU and K/La ratios with increasing LIL content. One implication of this is that Mars may be more depleted in moderately volatile elements than previously thought.

33rd LPSC Program------89 Thursday, March 14, 2002 MELTED METEORITES: DIFFERENT DIFFERENTIATES 8:30 a.m. Marina Plaza Ballroom

Chairs: A. Kracher P. H. Warren

Stimpfl M.* Ganguly J. Thermal History of the Unbrecciated Diogenite GRO (Grosvenor Mountains) 95555: Constraints from Inter- and Intra-Crystalline Fe-Mg Exchange Reactions [#1966] Inter- and intra-crystalline Fe-Mg exchange reactions are used to constrain the thermal history of the GR095555 diogenite. In-situ cooling, excavation followed by rapid cooling, burial within megaregolith blanket were slow cooling takes place, are all parts of the odyssey of this meteorite.

Warren P. H.* Northwest Africa 1000: A New Eucrite with Maskelynite, Unequilibrated Pyroxene Crisscrossed by Fayalite-rich Veins, and Stannern-like Geochemistry [#1147] NW A 1000 is an extraordinary eucrite. Half of the plagioclase has been shock-altered into isotropic glass (maskelynite). The pyroxenes are extraordinarily unequilibrated, and crisscrossed by veins that consist mainly of fayalitic olivine.

Srinivasan G.* 26Al-26Mg Systematics in A881394 Eucrite [#1489] Evidence for the presence of 26 Al in eucrite which supports the role of this short-lived radio nuclide as heat source.

McCoy T. J.* Ketcham R. A. Benedix G. K. Carlson W. D. Wilson L. Vesicular Basalts from Asteroids: Clues to Physical Processes in Their Parent Magmas [#1213] Four vesicular basalts from asteroids were studied. Vesicles sizes and distributions were quantified using X-ray computed tomography. Modeling of vesicle ascension suggests dynamic magma processes in eucrites and quenching of angrites.

Jagoutz E.* J otter R. Varela M. E. Zartman R. Kurat G. Lugmair G. W. Pb-U-Th Isotopic Evolution of the D'Orbigny Angrite [#1043] Pyroxene separates of D'Orbigny give similar Pb-Pb age as Angra dos Reis and LEW86010.(4559±1Ma) D'Orbigny might represent an earlier stage in the evolution of angrites, perhaps detectable slightly older age.

Goodrich C. A.* Krot A. N. Scott E. R. D. Taylor G. J. Fioretti A. M. Keil K. Formation and Evolution of the Ureilite Parent Body and Its Offspring [#1379] We summarize constraints and outline a model for the evolution of the ureilite parent body. Superchondritic Cal Al in ureilite precursor material may result from aqueous alteration/dehydration, as in dark inclusions in Allende. Ureilites derive from an offspring of the parent body.

Singletary S. J.* Grove T. L. Experimental Constraints on the Genesis of the Olivine-Pigeonite Bearing Ureilites [#1382] We present new evidence from ureilite melting experiments that provides support for the hypothesis that ureilites are the residues of a partial melting/smelting event that began just as augite was exhausted from the residue.

MittlefehldtD. W.* Berkley J. L. Petrology and Geochemistry of Paired Brachinites EET 99402 and EET 99407 [#1008] Brachinites are considered a type of primitive achondrite, as are the acapulcoite-lodranite and winonaite-IAB iron silicate groups. However, this study shows that brachinites had a very different origin than the latter two groups. If you only see one talk, see this one.

90 33rd LPSC Program Whitby J. A.* Busemann H. Eugster O. Holland G. Gilmour J.D. 1-Xe Analysis of a Magnetic Separate from Lodranite GRA95209 [#1838] I-Xe dating of a magnetic mineral separate from lodranite GRA95209 suggests that peak temperatures (and therefore melt migration) occurred early, at least a few million years before closure of the l-Xe system in phosphates from Acapulco.

Kracher A.* Sulfur in Asteroidal Cores: The Haystack and the.Lamppost [#1421] Magmatic iron meteorites originated from sulfur-bearing metallic liquids. Some small irons such as the Garden Head group let may represent metal nuggets from the residual S-rich eutectic of one of the major magmatic groups.

Benedix G. K.* Lauretta D. S. McCoy T. J. Thermodynamic Constraints on the Formation Conditions of Silicate-bearing JAB Iron Meteorites [#1317] A thermodynamic model is used to calculate closure temperatures and oxygen fugacities of silicate inclusions in lAB iron meteorites.

Liu Y. Z.* Nyquist L. E. Wiesmann H. Reese Y. Shih C-Y. Takeda H. Rb-Sr and Sm-Nd Ages of Plagioclase-Diopside-rich Material in Caddo County JAB Iron Meteorite [#1389] Rb-Sr and Sm-Nd isochron ages for coarse-grained andesitic material rich in plagioclase and diopside from the Caddo County lAB iron meteorite are 4.57 ± 0.23 Ga and 4.50 ± 0.04 Ga, respectively, consistent with the previously determined Ar-Ar age.

Kurat G.* Varela M. E. Ametrano S. J. Brandsti:itter F. Major, Minor and Trace Element Abundances in Metal and Schreibersite of the San Juan A Mass of Campo Del Cielo (JAB) [#1781] Trace element abundances in metal and schreibersite are variable and in schreibersite are correlated with size. Elemental fractionation in schreibersite shows similarity to possible carbonyl fractionation observed in Canyon Diablo metal.

33rd LPSC Program------91 Thursday, March 14, 2002 SMALL BODIES, BIG SCIENCE 1:30 p.m. Salon A

Chairs: D. D. Durda G. J. Consolmagno

Abell P. A.* Gaffey M. J. Hardersen P. S. A Detailed Compositional Investigation of the Potentially Hazardous Asteroid I998 ST27 [#1675] Preliminary analysis of IR reflectance spectra obtained of asteroid 1998 ST27 indicates the presence of a weak 1-micron band consistent with mafic silicates. Further analysis of these data will be presented which should constrain its composition.

Hardersen P. S.* Gaffey M. J. Abell P. A. M-Asteroids: Searching for Weak Silicate Features on Potentially Differentiated Objects [#1148] Results from an observational program to detect weak silicate features on M-type asteroids will be presented. Results include nearly full-rotational coverage of asteroids 69 Hesperia, 110 Lydia, 201 Penelope and 216 Kleopatra.

Gaffey M. J.* Kelley M.S. Hardersen P. S. Meteoritic and Asteroidal Constraints on the Identification and Collisional Evolution of Asteroid Families [#1506] Studies of meteorites and observations of asteroids can provide important constraints on the formation and evolution of asteroid families. The iron meteorites alone require the disruption of -85 differentiated asteroids, and the potential formation of -85 families.

Sunshine J. M.* Bus S. J. Burbine T. H. McCoy T. J. Binzel R. P. Unambiguous Spectral Evidence for High- (and Low-) Calcium Pyroxene in Asteroids and Meteorites [#1356] Several new S-asteroid spectra are modeled and found to contain both low- and high-calcium pyroxenes. Similar results are obtained for spectra of eucrites. Their inferred mineralogy is very consistent with petrographic results, lending confidence to the asteroid analyses.

Marti K. * Mathew K. J. Near-Earth Asteroid Origin for the Farmington Meteorite [#1132] We report nitrogen and xenon isotopic signatures in separated metal and non-magnetic phases of a catastrophically degassed L5 chondrite and discuss implications for the collisional event and the impactor.

Consolmagno G. J.* Britt D. T. Low-Density Materials and Asteroidal Macroporosity [#1701] Work on estimating asteroid macroporosity has raised a number of issues: ( 1) What is the role of hydrated minerals? (2) Can low-density materials be compressed to raise asteroid bulk density? (3) Can asteroids be all microporosity?

Ostro S. J.* Benner L.A. M. Giorgini J.D. Magri C. Margot J-L. Nolan M. C. Asteroid Radar Astronomy at the Dawn of the New Millennium [#1715] This talk will use images, movies, and radar-derived three-dimensional models to present recent highlights of asteroid radar research, concentrating on low-A V mission candidates.

Margot J. L. * Nolan M. C. Benner L.A. M. Ostro S. J. Jurgens R. F. Giorgini J.D. Slade M.A. Howell E. S. Campbell D. B. Radar Discovery and Characterization of Binary Near-Earth Asteroids [#1849] The radar instruments at Arecibo and Goldstone recently provided the first confirmed discoveries of binary asteroids in the near-Earth population. The physical and orbital properties of four near-Earth binary systems are described in detail.

92 ______33rd LPSC Program Holsapple K. A* Rubble Pile Asteroids: Stability of Equilibrium Shapes [#1843] A new approach to derive limit equilibrium shapes for rubble-pile asteroids with spin is given. Stability considerations are then formulated. Stability constraints limit the equilibrium shapes considerably, just as is the case for fluid bodies.

Asphaug E.* Petit J-M. Rivkin A. S. Removing Mantles from Cores: Tidal Disruption of Ancient Asteroids [#2066] As many as one percent of the present day major asteroids have been tidally disrupted by encounters with long-gone planets in the main belt.

Durda D. D.* Flynn G. J. HartS. D. Asphaug E. Impact Disruption ofThree Ordinary Chondrite Meteorites [#1535] We report preliminary results of a set of impact disruption experiments on three ordinary chondrite meteorites.

Ueda Y. * Hiroi T. Pieters C. M. Miyamoto M. Expanding the Modified Gaussian Model to Include the Space Weathering Effects: Estimation of the Weathering Degrees of Pulse-Laser Treated Olivine Samples [#1950] Modified Gaussian model was expanded by using Hapke's space weathering model. We could successfully deconvolve reflectance spectra of pure olivine samples coated with nanophase iron containing layers, using this new scheme.

Piatek J. L.* Hapke B. Nelson R. M. Smythe W. D. Hale A. S. Scattering Properties of Planetary Regolith Analogs [#1171] Samples of well-sorted materials have been studied to determine how their scattering properties change with changing particle size.

33rd LPSC Program 93 Thursday, March 14, 2002 10 BURNS: GANYMEDE CHILLS 1:30 p.m. Salon B

Chairs: j. R. Spencer L. P. Keszthelyi

Keszthelyi L.* Turtle E. McEwen A. Simonelli D. Geissler P. Williams D. Milazzo M. Radebaugh J. Jaeger W. Klaasen K. P. Breneman H. H. Denk T Head J. W. Galileo SSI Team Galileo SSI Observations of Io During Orbits C30-I33 [#1454] New Galileo SSI imaging of Io from orbits C30-I33 will be presented. The aging Galileo spacecraft continues to produce spectacular new results, including the tallest volcanic plume yet found on Io.

Lopes R. M. C.* Kamp L. W. Davies A. G. Smythe W. D. Carlson R. W. Doute' S. McEwen A. Turtle E. P. Leader F. Mehlman R. Shirley J. Segura M. Galileo NIMS Team Galileo 's Last Fly-Bys of Io: NIMS Observations of Loki, Tupan, and Emakong Calderas [#1793] NIMS results from the 2001 Galileo fly-bys oflo will be presented, focusing on three calderas that may contain lava lakes. Preliminary results from the January 2002 Io fly-by will be presented.

Williams D. A.* Keszthelyi L. P. Davies A. G. Greeley R. Head J. W. Galileo SSI Team High-Resolution Views of Io 's Emakong Patera: Latest Galileo Imaging Results [#1339] This presentation will discuss analyses of the latest Galileo SSI high-resolution images of the Emakong lava channels and flow field on Jupiter's moon Io.

Radebaugh J.* McEwen A. S. Milazzo M. Davies A. G. Keszthelyi L. P. Geissler P. Galileo SSI and Cassini ISS Observations ofio's Pele Hotspot: Temperatures, Areas, and Variation with Time [#1445] Temperatures oflo's Pele hotspot were found using dual-filter observations from Galileo and Cassini. T's average 1375 K, but vary widely over tens of minutes. Dropoff in emission with rotation consistent with lava fountaining at a lava lake.

Davies A. G.* Radebaugh J. Kamp L. W. Keszthelyi L. P. Lopes R. Geissler P. McEwen A. S. Spencer J. R. Williams D. Leader F. Smythe W. D. Carlson R. W. Galileo NIMS, SSI and PPR Teams The Lava Lake at Pele: An Analysis of High-Resolution, Multi- Wavelength Galileo Data [#1162] The eyes of Galileo: See Pele's glory at many wavelengths.

Milazzo M. P. * Geissler P. Keszthelyi L. P McEwen A. S. Radebaugh J. Eruption Temperatures at Tvashtar Catena, Io from Galileo I25 and I27 [#1699] Eruption temperatures at Tvashtar Catena on Io can be derived from observed brightness temperatures using a model developed by Keszthelyi and McEwen in 1997.

Rathbun J. A.* Spencer J. R. Tamppari L. K. Martin T. Z. Barnard L. Travis L. D. Recent Results from Galileo PPR at Io: Orbits 13I and 132 [#1371] Recent Galileo PPR results will be shown, including global day and nighttime maps, high latitude regional maps,

and high-reolution scans across hotspots and from pole to pole. S02 vapor pressure, global heatfow, and hotspot power outputs are estimated.

Spencer J. R. * Rathbun J. A. McEwen A. S. Pearl J. C. Bastos A. Andrade J. Correia M. Barros S. A New Determination of Io's Heat Flow Using Diurnal Heat Balance Constraints [#1831] We use heat balance arguments to obtain a new estimate of Io' s heat flow that does not depend on assumptions 2 about the temperatures of its thermal anomalies. Our estimated heat flow is somewhat less than 2.2 ± 0.9 W m- .

94 ------33rd LPSC Program Matson D. L.* Veeder G. J. Johnson T.V. Blaney D. L. Davies A. G. The Mystery of Io 's Wann Polar Regions: Implications for Heat Flow [#1413] Unexpectedly warm polar temperatures further support the idea that Io is covered virtually everywhere by cooling lava flows. This implies a new heat flow component. Io's heat flow remains constrained between a lower bound of 2 2 -2.5 W m- and an upper bound of -13 W m - •

Turtle E. P.* Jaeger W. L. McEwen A. S. Keszthelyi L. P. Milazzo M.P. Simonelli D. Galileo SSI Team New Galileo Observations of Ionian Mountains [#1677] The Galileo spacecraft continues to acquire spectacular images oflo. We will present the latest observations oflo's high mountains and their implications for mountain formation processes and the relationship between mountains and volcanoes on Io.

Jaeger W. L.* Turtle E. P. Keszthelyi L. P. McEwen A. S. The Effect of Thrust Fault Geometries on the Surface Deformation of Io: Implications for Mountains and Paterae [#1741] Because there can be no net strain oflo's surface area, orogenic thrust faults with certain geometries can generate tensile deformation of the surrounding plains. This may help to explain the statistical association between mountains and paterae.

Collins G. C.* The Youngest Grooves on Ganymede [#1783] The most recent episode of tectonic deformation in Ganymede is examined through global mapping of the youngest grooves. Also presented is the global distribution of smooth linear features in Ganymede bright terrain.

Prockter L. M.* Collins G. C. Murchie S. L. Schenk P.M. Pappalardo R. T. Ganymede Furrow Systems as Strain Markers: Implications for Evolution and Resuifacing Processes [#1272] The initial subcircular shape of Ganymede's furrow systems provides an ideal marker to quantify large-scale strain . . We use a new global dataset to investigate the mode of resurfacing associated with dark terrain breakup and grooved terrain formation.

33rd LPSC Program------95 Thursday, March 14, 2002 MARTIAN METEORITES 1:30 p.m. Salon C

Chairs: j. S. Delaney C. D. K. Herd

Walker R. J.* Brandon A. D. Nazarov M.A. Mittlefehldt D. Jagoutz E. Taylor L.A. 187Re-187Os Isotopic Studies of SNC Meteorites: An Update [#1042] Re-Os isotopic systematics of SNC meteorites indicate the Martian mantle evolved through most of solar system history with a chondritic Re/Os.

Beard B. L.* Taylor L.A. Lapen T. Mahlen N. Johnson C. M. Hafnium and Neodymium Isotopic Constraints on Shergottite Formation [#1933] Shergottite Hf-Nd isotope systematics are decoupled implying that their petrogenesis is unique compared to Earth and Moon analogs. Differences can be explained by open system behavior, fractionation of an unknown trace phase or ultra deep melting.

McCanta M. C.* Rutherford M. J. Jones J. H. An Experimental Study of Eu!Gd Partitioning Between a Shergottite Melt and Pigeonite: Implications for the Oxygen Fugacity of the Martian Interior [#1942] We experimentally investigated the partitioning behavior of Eu/Gd between a synthetic shergottite melt and pigeonite as a function of oxygen fugacity. This has implications for the oxidation state of the source region of the martian meteorites.

Delaney J. S.* Dyar M.D. Compositional and Oxidation State Zoning in Martian Pyroxene: Paradox or Process Indicator [#1659] Coordinated zoning studies of major, minor, trace elements and oxidation states in Martian minerals elucidate the magmatic evolution of QUE94201and suggest an important role for olivine and volatile fluxing in a complex magmatic history

Koizumi E.* McKay G. Mikouchi T. Le L. Schwandt C. Monkawa A. Miyamoto M. Crystallization Experiments of the Martian Meteorite QUE94201: Additional Constraints on Its Formation Condition [#1442] We focused on the Al/Ti ratio in synthetic pyroxenes as a marker for the onset of plagioclase crystallization and discuss the effects of oxygen fugacity on the Kd(Fe/Mg)ol/gl in our experiments using the same composition ofQUE94201.

McKay G.* Koizumi E. Mikouchi T. Le L. Schwandt C. Crystallization ofShergottite QUE 94201: An Experimental Study [#2051] Crystallization study of QUE 94201 supports the idea that (1) this sample formed under relatively reducing conditions, (2) the sample represents a crystallized melt, and (3) observed pyroxene zoning can be produced by simple single-stage cooling

Cahill J. T.* Taylor L.A. Patchen A. Nazorov M.A. Stockstill K. R. Anand M. Basaltic Shergottite Dhofar 019: A "Normal" Olivine Cumulate Product [#1722] Dh-019 is unique compared to all other basaltic shergottites. However, it is not the exotic rock once imagined. Multiple theories as to the genesis ofDh-019 are laid to rest. Evidence supports classification as a normal basaltic shergottite.

Stockstill K. R.* Bodnar R. J. McSween H. Y. Jr. Lentz R. C. F. Melt Inclusions in SNC Meteorites as Indicators of Parental Melt on Mars [#1644] Compositions of homogenized melt inclusions in SNC meteorites disagree with evolved compositions reported in other melt inclusions work. The compositions agree most closely with composition NKOl from Treiman and Goodrich (2001).

96 ------33rd LPSC Program Mikouchi T.* Miyamoto M. Comparative Cooling Rates of Nakhlites as Inferred from Iron-Magnesium and Calcium Zoning of Olivines [#1343] We estimated cooling rates of nakhlites by using Fe-Mg and Ca zoning profiles of olivines. The results suggest that NW A817 cooled near the surface, and Lafayette was located deeper than 30 m. Nakhla and Governador Valadares appear intermediate.

Deloule E.* DIH Ratio Ion Probe Measurements on Magmatic Minerals from Martian Meteorites: Implications for Degassing of the Martian Mantle [#1607] Ion probe measurements of D/H ratios in magmatic minerals from 5 Martian meteorites give low 8D values, suggesting that the Martian mantle is not yet completely degassed, and high 8D values due to their alteration by Martian surface water.

Herd C. D. K. * Treiman A. H. McKay G. A. Shearer C. K. Experimental Lithium and Boron Partition Coefficients: Implications for Magmatic Water in Martian Meteorites [#1333] Experiments were performed using the QUE 94201 martian basalt composition, doped with Li and B. The results quantify Li and B partitioning between olivine, pyroxene and plagioclase, and have implications for magmatic water in martian meteorites.

Ocker K. D.* Gilmour J.D. Martian Atmospheric and 'Interior' Xenon Components in EETA79001 Lith-B Mineral Separates [#1603] Presented are the measured isotopic signature and concentration of xenon in mineral separates of EET A 79001 Lith-B. The trapping and relationship between Martian xenon components will be discussed.

Eugster O.* Busemann H. Lorenzetti S. The Pre-Atmospheric Size of Martian Meteorites [#1096] The pre-atmospheric size of martian meteorites was calculated based on 80Kr produced by epithermal secondary cosmic-ray produced neutrons of 30-300 e V energy. For seven meteorites we obtained minimum radii of 22-27 em, corresponding to 150-270 kg.

33rd LPSC Program------97 Thursday, March 14, 2002 REFRACTORY INCLUSIONS 1:30 p.m. Marina Plaza Ballroom

Chairs: G. J. MacPherson S. B. Simon

Jones R. H.* Leshin L.A. Guan Y. Heterogeneity and 160-enrichments in Oxygen Isotope Ratios of Olivine from Chondrules in the Mokoia CV3 Chondrite [#1571] Two chondrules from Mokoia contain olivine in which oxygen isotopes are extremely heterogeneous, with some grains highly enriched in 160. These data provide an important link between CAis and chondrules.

Pack A.* Yurimoto H. Palme H. Oxygen Isotope Composition of Refractory Forsterite in R-Chondrite Dar Al Gani 013, Unequilibrated Ordinary, and Carbonaceous Chondrites [#1664] We have measured 0-isotope composition of refractory forsterite in different carbonaceous, ordinary and R- chondrites using SIMS. We will discuss a model for the formation of the population of refractory forsterite pre- dating the formation of the different chondrite types.

Krot A. N.* Aleon J. McKeegan K. D. . Mineralogy, Petrography and Oxygen-Isotopic Compositions of Ca, Al-rich Inclusions and Amoeboid Olivine Aggregates in the CR Carbonaceous Chondrites [#1412] CAis and AOAs in CRs are mineralogically pristine (unaltered). In spite of the 0-isotopic homogeneity of individual CAis, the compositions of the CR CAis and AOAs spread almost continuously over a wide range: il170 = -3%o to -24%o. All 160-poor CAis have .igneous textures.

MacPherson G. J.* Krot A. N. Ulyanov A. A. Hicks T. A Comprehensive Study of Pristine, Fine-grained, Spinel-rich Inclusions from the Leoville and Efremovka CV3 Chondrites, 1: Petrology [#1526] Fine-grained spinel-rich CAI from Efremovka and Leoville lack the overprint ofNa and Fe metasomatism seen in Allende. They contain spinel, pyroxene, anorthite, and melilite; most have a zoned structure with spinel-rich cores, melilite-rich mantles.

Aleon J.* Krot A. N. McKeegan K. D. MacPherson G. J. Ulyanov A. A. Oxygen Isotopic Composition of Fine-grained Ca-Al-rich Inclusions in the Reduced CV3 Chondrite Efremovka [#1426] 0 isotopes were measured in 4 fine-grained CAis from Efremovka. One CAI has 160-rich melilite and an outer type A-like zone with 160-poor melilite. Various degrees of isotopic exchange from core to rim of the CAis seem associated to re-heating.

Fagan T. J.* Yurimoto H. Krot A. N. Keil K. Constraints on Oxygen Isotopic Evolution from an Amoeboid Olivine Aggregate and Ca,Al-rich Inclusion from the CV3 Efremovka [#1507] Primary minerals from an amoeboid olivine aggregate and fine-grained Ca,Al-rich inclusion from the CV3 Efremovka have 160-rich compositions, suggesting that AOAs and most CAis share a similar source of oxygen.

Itoh S. * Rubin A. E. Kojima H. Wasson J. T. Yurimoto H. Amoeboid Olivine Aggregates and ADA-bearing Chondrulefrom Y-81020 C03.0 Chondrite: Distribution of Oxygen and Magnesium Isotopes [#1490] 16 17 18 26 All minerals in AOAs from Y -81020 C03 enriched in 0 (8 , 0 = --40%o) and the anorthite have Mg excess but smaller than the canonical value. AOA-bearing chondrule depleted in 160 and has no radiogenic 26Mg.

98 ------33rd LPSC Program Yoshitake M.* Koide Y. Yurimoto H. Distributions of 0 Isotopes in Wark-Lovering Rim of a Type B2 CAl from the Vigarano Meteorite [#1502] We found 0 isotopic zoning in melilite in the W-L rim and anorthite from a type B2 CAl. These zoning patterns restrict thermal history of the CAL We conclude the zoning occurred in the parent body but 160-poor melilite generated in the solar nebula.

SimonS. B.* Grossman L. Krot A. N. Ulyanov A. A. Bulk Chemical Compositions of Type B Refractory Inclusions [#1620] Assessment of evaporative losses of Mg and Si experienced by CAis is impeded by a lack of appropriate data. We address this problem by obtaining accurate bulk chemical data on each of a suite of inclusions for which Mg and Si isotopic data exist.

Richter F. M. * Davis A. M. Mendybaev R. A. How the Type Bl CAis Got Their Melilite Mantles [#1901] The difference between Type B 1 and B2 CAis are explained in terms of the relative rates of evaporation and chemical diffusion in the melt. Fast evaporation makes B ls; slow makes B2s.

Ash R. D.* RussellS. S. Belshaw N. C. Young E. D. Gounelle M. Mg Isotopes in Melilite, Fassaite and Spinels in CAis: Evidence for Evaporation, Equilibration and Late Stage Alteration [#2063] High precision laser ablation MC-ICP-MS ofMg isotopes shows uniform initial Mg and Al-Mg systematics in a Leoville Type B CAI. Part of the inclusion underwent complete resetting after complete decay of 26 AI.

Mendybaev R. A.* Davis A. M. Richter F. M. The Effect of Sample Size on Experimental Evaporation of Type B CAis [#2040] Evaporation of CAl-like melts in vacuum was studied as function of a sample size and temperature. It is shown that these parameters do not effect evaporation kinetics and Mg isotopic fractionation. This suggest that recondensation has minor, if any, effect on the evaporation of CAl-like liquids.

Ito M. * Ganguly J. Potassium Diffusion in Melilite: Experimental Determination and Application to the Cooling Rates of the CA!s [#1568] We have undertaken a systematic investigation of the tracer diffusion kinetics of K in melilite for the cooling history ofthe CAL The initial cooling rate ofthe CAI should have been< 1 C/100 yr in order for the melilite to lose the excess 41 K.

33rd LPSC Program------99 Thursday, March 14, 2002 POSTER SESSION II 7:00-9:30 p.m. Gymnasium

Martian Meteorites

Imae N. Okazaki R. Kojima H. Nagao K. The First Nakhlite from Antarctica [#1483] The petrographical studies and noble gas analyses of the specimen (Y000593) and paired specimen (Y000749) assured that these are nakhlites coming from Mars.

Yanai K. New Martian Meteorite Identified as a Lherzolitic Shergottite Similar to ALH-77005 Meteorite [#1248] Antarctic meteorite YA1075(tentative name) has been identified as a new martian meteorite similar to ALH-77005 shergottite for its minerals and compositions, espcially maskelynized plagioclase(-An50). Oxygen isotope data strongly support this result.

Wentworth S. J. Thomas-Keprta K. L. McKay D. S. Water on Mars: Petrographic Evidence [#1932] FE-SEM and TEM studies of martian meteorites are focused on identifying and characterizing possible martian weathering products using SEM petrography. New data include unambiguous evidence that Ca-sulfate.in the Nakhla meteorite is of martian origin.

Jones J. H. Volatile Element Reservoirs on Mars: C and H Isotopic Signatures of Crust, Mantle, and Aquifer [#1150] Analyses of SNC meteorites, coupled with theo~etical considerations, lead to a proliferation of volatile element reservoirs on Mars.

Mathew K. J. Marti K. Marty B. Fission Xenon on Mars [#1427] Fission Xe components due to 244Pu decay in the early history of Mars have been identified in nakhlites; as in the case of ALH84001 and Chassigny the fission gas was assimilated into indigenous solar-type Xe.

Busemann H. Eugster O. The Trapped Heavy Noble Gases in Recently Found Martian Meteorites [#1823] The composition of the trapped Ar, Kr, and Xe in the Martian meteorites Los Angeles, Say AI Uhaymir 005/008, and 094 is discussed and found to be consistent with a mixture of Martian mantle and atmosphere noble gases and terrestrial contamination.

Mohapatra R. K. Schwenzer S. P. Ott U. Krypton and Xenon in Martian Meteorites from Hot Deserts- The Low Temperature Component [#1532] Low temperature Kr and Xe signatures of martian meteorites from hot deserts are commonly explained by a mixture of Chassigny and Air type gases. But an elementally fractionated Air component (EFA) like that in ALH 84001 and Nakhlites but of terrestrial origin, can also explain these signatures.

Nishiizumi K. Okazaki R. Park J. Nagao K. Masarik J. Finkel R. C. Exposure and Terrestrial Histories ofDhofar 019 Martian Meteorite [#1366] We report preliminary results for the cosmogenic radionuclides, 36Cl, 26 AI, and 10Be and noble gases in a basaltic shergottite Dhofar 019. We found long terrestrial age ofDhofar 019 even though this meteorite was found in hot desert, Oman.

Schwenzer S. P. Mohapatra R. K. Herrmann S. Ott U. Noble Gas Distribution in the Martian Meteorite Sayh Al Uhaymir 005 (SaU 005) [#1624] Noble gases are reported for glass, bulk and a glass free sample of the Martian meteorite SaU 005. The data are interpreted as indicating significant contribution from gases in vesicles.

100 ------33rd LPSC Program .. Oe K. McKay G. Le L. Miyamoto M. Mikouchi T. REE and Sr Partition Coefficients for Nakhla Pyroxenes: Their Relationships to Other Element Abundances£#2065] We have looked at systematic variations in REE and Sr partitioning for Nakhla pyroxenes in terms of concentrations of other elements, especially AI.

Bridges J. C. Schofield P. F. Smith A. D. Scholl A. Grady M. M. Chemistry and Valency ofChromite in SNC Meteorites [#1695] 3 2 Shergottite chromite core· mantle sources were Al-poor, Fe-rich, low Fe +/Fe +, f02 1 to 4 units

SuttonS. R. Rao M. N. Dreibus G. McKay D. S. Wanke H. Wentworth S. Newville M. Trainor T. Flynn G. J. Chlorine/Bromine Ratios in Fracture-filling Aqueous Alteration Products in Nakhla Olivine [#1278] The Cl/Br ratios in fracture-filling materials in veins in Nakhla olivine was determined using x-ray microprobe (Br) and EDX (Cl) techniques. The Cl/Br ratio of 55 ± 13 shows that the secondary altered material is pristine, extraterrestrial and akin to the Martian soil.

Musselwhite D. S. Jones J. H. Calibration of the Europium Redox Indicator at Conditions Relevant to the Martian Meteorites [#1712] We are conducting experiments on the redox relationship of Eu partitioning for compositions relevant to martian meteorites. Results so far yield f02s for the shergotites which are higher than those previously determined by the Eu method.

Barrat J. A. Jambon A. Bohn M. Gillet Ph. Sautter V. Gopel C. Lesourd M. Keller F. The Picritic Shergottite North West Africa 1068 (NWA 1068 or "Louise Michel") [#1538] We report on the discovery of a new Martian meteorite from Morocco. This rock is a picritic shergottite and displays REEs and incompatible element features similar to Shergotty.

Mikouchi T. Miyamoto M. Olivine Cooling Rate of the Northwest Africa 1068 Shergottite [#1346] We report preliminary mineralogy and cooling rate estimate of the newly discovered shergottite, NWA1068. Olivine zoning suggests cooling near the surface though the presence of homogeneous "ghost" crystal implies prior slower cooling.

Edmunson J. Borg L. E. Shearer C. K. Papike J. J. Olivines in Lherzolitic Shergottite ALH77005: Inclusions and Geochronology [#1844] REE analyses of phases from ALH77005 have been completed in order to constrain mechanisms to shift olivine mineral fractions off the Sm-Nd isochron defined by maskelynite and pyroxene.

Zipfel J. Goodrich C. A. The Origin of Megacrysts in SaU 005 and EETA79001 (Lithology A): Evidence from a Study of Melt Inclusions [#1279] REEs were analyzed in melt inclusions in olivine and low-Ti chromites in SaU 005 and EETA79001, lithology A. Results show that inclusions and host crystals were derived from a LREE depleted reservoir similar to bulk SaU 005, DaG 476 and QUE 94201.

Monkawa A. Makino K Mikouchi T. Ishii T. Miyamoto M. Characteristics of Titanium-rich Kaersutites in Martian Meteorites and Terrestrial Rocks [#1440] We estimated Fe3+/ rFe ratios of kaersutites in three martian meteorites (Zagami, LEW88516, NWA856) by electron microprobe, and further discussed the relationship ofTi, Fe3+, and OH contents.

33rd LPSC Program 101 Fritz J. Greshake A Hecht L. Sti:iffler D. Shock Metamorphism of Martian Meteorites: New Data from Quantitative Shock Barometry [#1504] Quantitative shock barometry reveals peak shock pressures of 26-32 GPa in Shergotty, 28-30 in Zagami, 27-38 in EETA79001, 33-45 in SaU 005,39-45 in DaG 476 and 40-45 in ALH77005. The existence of a high shock and a moderate shock group among the basaltic and lherzolitic meteorites is confirmed.

CAis, AOAs, and Dis

Hirai K. Ushikubo T. Hiyagon H. Distribution of Oxygen Isotopes in the Wark-Lovering Rims in CA!s [#1494] Diopside in the Wark-Lovering rim shows 160-poor composition in spite of olivine in the accretionary rim having a 160-rich composition, suggesting that a low temperature alteration process or a flash heating event erased 160-emichment in diopside.

Ushikubo T. Hirai K. Hiyagon H. Mg Isotopic Compositions ofWark-Lovering and Accretionary Rims ofCAls [#1587] Mg isotopic measurements were performed for core, Wark-Lovering (W-L) rims and olivine in accretionary rims of CAis. Fractionation of Mg of W -L rims clearly correlates with that of core. Mg isotopes of olivine in accretionary rims are not fractionated.

SuttonS. R. SimonS. Grossman L. Delaney J. S. Beckett J. Newville M. Eng P.. Rivers M. Evidence for Divalent Vanadium in Allende CAl Fassaite and lmplicatiions for Formation Conditions [#1907] The vanadium in zoned Allende fassaite was determined to be in a mixed, divalent and trivalent state. No microscale variation in V oxidation state was observed, suggesting that V content variations are unlikely to be controlled by oxidation state.

Varela M. E. Kurat G. Hoppe P. Weisberg M. K. Chemistry of Glass Inclusions in Olivines of a Dark Inclusion and the Host Allende CV3 Chondrite [#1190] Glass inclusions in olivine of the DI and Allende host show that conditions during the formation of their host olivine allowed Na to be incorporated into the glasses as a primary element.

Komatsu M. Miyamoto M. Mikouchi T. Krot A. N. Keil K. Heating Experiments of Olivine-Anorthite Mixtures: Clues to Understanding the Textural Relationships Among Olivine, Al-diopside and Anorthite in Amoeboid Olivine Aggregates [#1258] Heating experiments of olivine+anorthite mixtures and the mineralogical study of AOAs in the reduced CV3 chondrites suggests that high-Ca pyroxenes in AOAs could have resulted from small degree of melting of olivine and anorthite.

Achondrites

Patzer A. Hill D. H. Boynton W. V. Sipiera P. P. Jerman G. A Dar Al Gani 872: Yet Another Eucrite, Yet Another Lesson to Learn? [#1106] We present chemical and mineralogical data on a new monomict basaltic eucrite recovered from Libya. In contrast to most other eucrites, it exhibits high shock features, unusually heterogeneous exsolution of pigeonite, and interesting melt pockets.

Misawa K. Yamaguchi A. Kaiden H. U-Pb Isotopic Systematics of Zircons from Highly Shocked Eucrite Padvarninkai [#1769] We have examined highly shocked eucrite Padvarninkai, and focused on the U-Pb isotopic systematics of well- documented eucritic zircon. Zircons in a fractured ilmenite grain give quite discordant U/Pb ratios to a much higher degree than any other eucritic zircons.

102 ------33rd LPSC Program Howard L. M. Domanik K. J. Drake M. J. Mittlefehldt D. W. Petrology of Antarctic Eucrites PCA 91078 and PCA 91245 [#1331] Antarctic eucrites PCA 91078 and PCA 91245, are petrographically characterized and found to be unpaired, type 6, basaltic eucrites. Observed textures that provide insight into the petrogenesis of these meteorites are also discussed.

Schwartz J. M. McCallum I. S. Camara F. Domeneghetti C. Zema M. Pasamonte Eucrite: Subsolidus Thermal History [#1846] Pasamonte is an unequilibrated eucrite with finely exsolved (nanometer scale) pigeonites and augites showing a primary magmatic zoning trend. Fractured grains show a unique pattern of zoning consistent with metasomatism by a Fe-rich fluid/melt.

Treiman A. H. Goldman K. Petrology of the Cumulate Eucrite Serra de Mage [#1191] Serra de Mage is a cumulate eucrite, with bizarrely shaped pyroxene crystals. One section contains a veinlet of fine-grained silica, probably chalcedony.

Ivanova M.A. Burbine T. H. Dickinson T. L. McCoy T. J. An FeO-Rich Clast from the Pesyanoe Aubrite: Indigenous or Foreign? [#1080] We have identified an FeO-rich clast in the Pesyanoe aubrite. Possible origins for this clast include crystallization from an FeO-rich immiscible melt, oxidation during crystallization of an aubritic melt, or admixture of a foreign clast followed by reduction.

Welten K. C. Nishiizumi K. Caffee M. W. Cosmogenic Radionuclides in Aubrites [#2043] Concentrations of cosmogenic 10Be and 26Al suggest that most aubrites were large enough to build up significant fluxes of thermal neutrons. This suggests that the long cosmic-ray exposure ages represent the transfer times from the parent body to Earth.

Kolar S. E. Domanik K. J. Musslewhite D. S. Drake M. J. Bilanga: A Unique Diogenite [#1338] The Bilanga diogenite is petrographically examined and found to contain diopside and plagioclase aggregates up to several 100 microns in size. Small scale, original igneous contacts between these phase are often preserved despite brecciation.

Hoffman E. J. Ferrous Ion Sites in Angrite Pyroxenes: A Mossbauer Spectroscopy Study [#1973] Mossbauer spectra of angrites D'Orbigny and Sahara 99555 show that pyroxene ferrous ion is preominantly in the M1 site, not the M2 as for Angora dos Reis. These results are consistent with IR spectral data (Burbine et al., 2001, LPS XXXII,1857).

Goodrich C. A. Keil K. Feldspathic and Other Unusual Clasts in Polymict Ureilite DaG 165 [#1777] We present first results of a study of feldspathic and other unusual clasts in polymict ureilites, in which we will identify clasts indigenous to the UPB, establish criteria for pristinity, and examine relationships of pristine indigenous lithologies to monomict ureilites.

Lunar Basalts: The Mafic Truth

Miyamoto H. Haruyama J. Rokugawa S. Onishi K. Palmero A. Ground Penetrating Radar to Detect Lava Tubes: Preliminary Results of a GPR Application to Fuji Volcano, Japan [#1482] Lava tubes are quite adequate for the development of an early-stage lunar base. Also, lava tubes are quite important for emplacements of vast lava fields. We present our preliminary results of a new method to detect lava tubes by Ground Penetrating Radar at Fuji volc~no in Japan.

33rd LPSC Program------103 Kodama S. Yamaguchi Y. Lunar Mare Volcanism in the Eastern Nearside Inferred from Clementine UWIS Data [#1284] In order to understand lunar mare volcanism, the stratigraphy of mare basalts in the eastern nearside was mapped using Clementine UVVIS data.

Takata T. Hori S. Compositional Variation of Mare on the Farside of the Moon and Its Implication for the Impact Tectonics of the South Pole-Aitken Basin [#1460] Clementine UV!VIS data of mare on the farside are conducted. The radial increase of FeO and Ti02 of mare basalts from the South Pole Aitken center is recognized. It may implicate the post impact subsurface structure of the SPA basin.

Giguere T. A. Hawke B. R. Bussey D. B. J. Smith G. A. Blewett D. T. Taylor G. J. Lucey P. G. Spudis P. D. Cryptomare in the Lomonosov-Fleming Region of the Moon [#1466] The Lomonosov-Fleming region is an ancient impact basin that contains dark halo craters, confirming the presence of a cryptomare. Mapping efforts reveal the extent of the cryptomare. Ti02 values are higher in this region than for any other cryptomare on the Moon.

FlorE. L. Gillis J. J. Jolliff B. L. Lawrence D. L. Investigating the Origin ofTh in Mare Basalts of the Western Procellarum Region [#1909] Clementine spectral reflectance and compositional data, and Lunar Prospector gamma-ray data are used to map individual basalt flows in the western Procel!arum and to investigate whether Th was inherent to the basalts or the result of surface contamination.

Shearer C. K. Neal C. R. Papike J. J. The Behavior ofTh and Sm in Lunar Basalts. Establishing a Better Understanding of Remotely Sensed Lunar Data for Use in Deciphering the Igneous History of the Moon [#1621] To gain a better understanding of remotely sensed Th-REE data from the Moon, we are better defining the behavior of Th and Sm in lunar volcanic glasses.

Hagerty J. J. Shearer C. K. Papike J. J. Trace Element Signatures in the Apollo 14 High-A! Basalts: What Do They Represent? [#1574] Analyses of olivine, plagioclase, and phosphate in the Al4 high-A! basalts indicate that compatible and incompatible elements exhibit variability consistent with differences observed in the bulk samples. It is concluded that this variability is not the result of random sampligg.

Bombardieri D. J. Norman M.D. Kamenetsky V. S. Danyushevsky L. V. Sulfide Undersaturated Apollo 12 Basaltic Magmas: Implications for Chalcophile Element Abundance in the Lunar Mantle [#1177] Sulfur contents of homogenized, olivine-hosted melt inclusions from Al2 picritic basalts show that the magma was undersaturated in sulfide. Low chalcophile element abundances in mare basalts must be a primary feature of the lunar mantle and not due to residual sulfide during melting.

Wood A. R. Basu A. Estimating Mineral Compositions of Planetary Suifaces from Chemical Compositions: A Comparison Between Modal Analysis, CIPW Normative Mineralogy, and Mixing Calculations as Applied to Lunar Mare Basalts [#1739] New calculation procedures are necessary to estimate mineral distribution in rocky planetary bodies from chemical compositions.

104 ------33rd LPSC Program Dyar M.D. Housely R. M. Stiltner S. A. 7 Moss bauer Study of 5 F e-Doped Synthetic Anorthite: Implications for Interpretation of Lunar Anorthite Spectra [#1725] Moss bauer spectra of 57Fe-doped synthetic anorthites are reported. Results show that unusually large peak widths may be the result of the onset of ferromagnetic interactions (for ferrous and ferric endmembers) or relaxation effects (for ferric anorthite).

Fernandes V. A. Burgess R. Turner G. Age Determination of Lunar Regolith Samples from the Luna I6 and 24 Cores Using IR-Step Heating [#1753] Ar-Ar age determination of <1 mg basaltic fragments from Luna 16 and 24 cores. A dominant age of 3.4 Ga for Luna 16 samples is comparable to previous studies. Luna 24 results show one dominant age (3.3 Ga), but also the suggestion of more than 1 flow within Mare Crisium.

Dikov Yu. P. Gorshkov A. I. Sivtzov A. I. Wlotzka F. Ivanov A. V. SiC and Graphite in the Sublimate Layer of Lunar Orange Glass Spherules [#1186] Siliconcarbide (moissonite) and graphite were detected by electron diffraction in the surface layers of Apollo 17 orange glass spherules.

Mars Craters

Mitchell D. E. Sakimoto S. E. H. Garvin J. B. MOLA Topography and Morphometry of Rampart and Pedestal Craters, Mars [#1805] Martian rampart and pedestal craters have characteristic geometric parameter ranges that are significantly different than fresh craters. Combined MOLA geometric measurements and MOC analyses can be used to constrain their modification.

Aittola M. Ohman T. Kostama V-P. Raitala J. Impact Craters Establish Geological Diversity Within Hellas Region [#1485] The distributions of impact craters with fluidized ejecta, collapsed/modified interiors and fluvial activity establishes the diversity of conditions within different geologic units within Hellas area.

Fujihara T. Kurita K. Modeling of the Mantle Rebound for the Giant Impact Craters on Mars [#1874] We assumed that large impact craters on Mars are axial symmetry with respect to the basin center for topography and gravity, and calculated mantle rebound model. In all large craters, the crustal thickness at the center of the basin is quite thin.

Kosarev I. B. Losseva T.V. Nemtchinov I. V. Formation of Heated Nearsurface Layers Due to Radiation Emitted During a Meteoroid Impact onto Mars [#1282] Radiation emitted during impacts onto Mars heats layers of Martian atmosphere adjacent to the surface causing so called 'thermal layer effect'. Parameters of these layers formed due to radiation were estimated.

Thorsos I. E. Newsom H. E. Davies A. G. Impact-induced Hydrothermal Systems and Mineral Deposition on Mars [#1912] Modeling of hydrothermal circulation at impact craters on Mars to determine system duration and potential mineral deposition in the context of Mars exploration.

Mars Tectonics

Goudy C. L. Gregg T. K. P. Insight to the Evolution of Wrinkle Ridges in Hesperia Planum, Mars [#1135] Wrinkle ridges are linear to arcuate, asymmetric, topographic highs; the precise origin is unknown. Study results reveal NE-striking wrinkle ridges formed prior to NW -striking wrinkle ridges, and the deposits of Hesperia Planum are thin, <2 km.

33rd LPSC Program------105 Tate A. Mueller K. J. Golombek M.P. Geometry and Kinematics of Wrinkle Ridges on Lunae and Solis Plana, Mars: Implications for Fault/Fold Growth History [#1836] The three dimensional geometry of wrinkle ridges on Lunae and Solis Plana suggest they form by rapid lateral propagation and linkage of fault-propagation fold segments above reactivated blind thrust faults.

Pounders E. Anderson R. C. Dohm J. M. Haldemann A. F. C. Golombek M.P. Tectonic Evolution of the Eastern Hemisphere of Mars [#1906] The magmatic-tectonic history of Mars is largely dominated by the Tharsis magmatic complex of the western hemisphere and the Elysium rise of the eastern hemisphere. In order to address the history of Mars, the tectonic history of the eastern hemisphere must also be unraveled.

Webb B. M. Head J. W. III Terrestrial Analogs for Noachian Tectonics of the Tharsis Rise and Thaumasia Plateau, Mars [#1825] The morphology of the tectonic features of the Thaumasia plateau is similar to what is seen in terrestrial gravity sliding, with subsidence at the summit, peripheral compression, and translational or shear fault systems connecting the two.

Watters T. R. Schultz R. A. The Fault Geometry of Planetary Lobate Scarps: Listric Versus Planar [#1668] Lobate scarps are landforms that have been described on Mercury, the Moon and Mars.

Mars: Geophysics and Geochemistry

Wieczorek M. A. Zuber M. T. The Thickness of the Martian Crust as Inferred from Geoid-to-Topography Ratios [#1390] By calculating geoid-to-topography ratios (GTRs) for the southern highlands of Mars, we infer that the average thickness of the Martian crust is 60±24 km.

Norman M.D. Thickness and Composition of the Martian Crust Revisited: Implications of an Ultradepleted Mantle with a Nd Isotopic Composition Like that of QUE94201 [#1175] A revised geochemical model for the thickness of the martian crust is more consistent with geophysical estimates but creates other problems.

Ghosh A. Weidenschilling S. J. McSween H. Y. Jr. Nimmo F. Accretion and Its Effect on the Thermal History of Mars [#1885] Shorter accretion timescales for Mars supported by theoretical simulations and chronologie data may require a significant role for 26 AI in the early thermal evolution of Mars.

Martin P. Stofan E. R. Smrekar S. E. Raymond C. A. Correlation of Geophysical and Geological Datasets for Mars [#1477] Magnetic and gravity data for Mars have been compared to images of the martian surface, with the aim of determining the sources of the observed pattern of magnetic anomalies.

Rochette P. Sautter V. Brunet F. Chevrier V. Lorand J.P. Matching Martian Magnetic Anomalies and SNC Magnetic Properties [#1199] A review of remanence intensity and mineral carrier is provided to discuss the source of Martian magnetic anomalies. It appears that pyrrhotite is the major magnetic mineral in SNC and could account for the observed anomalies.

106 ------33rd LPSC Program Hood L. L. Richmond N.C. Mapping and Modeling of Major Martian Magnetic Anomalies [#1128] Modeling of major anomalies in the SH indicates minimum mean magnetization intensities of about 0.0006 Am2/kg (0.0006 emu/g). Inferred directions of magnetization are used to estimate paleomagnetic pole positions.

Mars Polar Terrain and Processes

Herkenhoff K. E. Soderblom L. A Kirk R. L. MOC Photoclinometry of the North Polar Residual Cap on Mars [#1714] The surface topography of the north polar residual cap on Mars is not as rough as it appears in contrast-enhanced images, with typical slopes of less than 2.5 degrees.

Troy R. F. Bass D. Diurnal Albedo Variations of the Martian North Polar Water Ice Cap [#1761] Presentation of findings regarding diurnal variations in the north polar water ice cap of Mars as part of a larger study of the interannual and seasonal variations of the Martian north polar water ice cap.

Fishbaugh K. E. Head J. W. III The Martian North Polar Cap as a Cold-based Ice Sheet: Predicted Erosional and Depositional Features [#1327] The Mars north polar cap is best described as a cold-based ice sheet. We examine the range of depositional and erosional features which may be formed on Earth by such an ice sheet and compare them to features on Mars.

Head J. W. III Kreslavsky M. A Mars: North Polar Deposit Stratigraphic Relationships and Candidate Time Scales [#1744] We consider characteristic time scales of obliquity-controlled climate variations and try to correlate them with the observed stratigraphy of northern polar deposits. We argue for a scenario where the present north polar cap is at least 4 Myr old.

Tanaka K. L. Waxing and Waning of the North Polar Layered Deposits of Mars [#2039] New geologic mapping of the north polar region of Mars indicates possible extents of polar deposits throughout the Amazonian Period, indicating a possibly complex waxing and waning of polar deposits.

HoffmanN. Kargel J. S. Tanaka K. L. Basal Melting of a COr rich Ice Cap on Mars [#1509] Basal melting of the permanent polar caps of Mars is often inferred from terrain features. We show that a water ice cap cannot melt under likely conditions, so either the cap contains large amounts of C02, or the evidence for melting is incorrect.

PrattS. Head J. W. III Lobate Flow of the South Polar Layered Terrain Margins: Evidence from MOLA Data [#1866] Flow lobes at the margin of the south pole layered terrain suggest that the Late Amazonian deposit flowed in recent geologic history.

Horvath A Berczi Sz. Ganti T. Gesztesi A Szathmary E. The "Inca City" Region of Mars: Test Fieldfor Dark Dune Spots Origin [#1109] We studied transformational sequence of individual and multiple dark dune spots (DDSs) in the same part of the "Inca City" region of Mars. We determined seasonal and annual reappearance of DDSs "constellations" in this region.

33rdLPSCProgram ______l07 Horvath A. Ganti T. Berczi Sz. Gesztesi A. Szathmary E. Morphological Analysis of the Dark Dune Spots on Mars: New Aspects in Biological Interpretation [#1108] New results of our morphological analysis of Martian dark dune spots (DDSs) are: a) DDSs are crater-like holes in the frost layer, b) formation ofDDS-holes begins from the bottom of frosted layer. Biological aspects ofDDSs origin are discussed.

Nakamura T. Tajika E. Evolution of the Climate System of Mars: Effects of Obliquity Change [#1057] We introduce a one-dimensional climate model with seasonal changes of solar radiation and variations in the obliquity. We show that the Martian climate could have dramatically changed repeatedly in short-term cycles during the Martian history.

Yokohata T. Odaka M. Kuramoto K.

Role of H20 and C02 Ices in Martian Climate Changes [#1546] The stability of martian climate is studied by energy balance climate model. The long-term C02 mass exchange process between the atmosphere and C02 ice caps is investigated with particular importance to the effect of H20 and C02 ice distribution.

Mars: Oceans, Lakes, Valleys and Other Flowing Things

Nee! C. R. Marston R. A. Degenhardt J. Giardino J. R. Rock Glaciers on Mars [#1841] Our study of rock glaciers in the San Juan Mountains of Colorado seeks to model geomorphic controls on ridge-and-furrow spacing on rock glaciers to provide criteria to better identify rock glaciers on Mars.

Harrison K. H. Grimm R. E. Rheological Constraints on Martian Landslides [#1432] The rheology, and therefore the dynamic behavior, of martian landslides is poorly constrained. We present results of landslide simulations performed with a dynamic analysis model (DAN), in which a number of different rheologies are tested and compared.

Jaumann R. Reiss D. Nirgal Vallis: Evidence for Extensive Sapping [#1579] Topographic information has been used to estimate the three-dimensional structure of the Nirgal Vallis drainage system. The analysis of morphometric and topologic network parameters indicates sapping as the major valley network forming process.

Arfstrom J. D. A Model of Recent Martian Gully and Alcove Formation by Seepage of Water [#1174] This abstract presents a model that utilizes long-term seepage of groundwater, as opposed to sudden outbursts of large volumes of groundwater, to perform the erosion that forms Martian gullies and alcoves of recent age. van Gasselt S. Hauber E. Reiss D. Hoyer M. Matz K. D. Jaumann R. A Channel Database Based on a Morphometric Classification of Valley Networks [#1949] We compiled a global Mars channel database based on morphometric parameters for different types of valley networks. The classification method for valley network features is based on basic morphologic measurements.

Therkelsen J. P. Dyar M.D. Morgan P. Geologic and Temporal Constraints on the Martian Dichotomy Through the Study of Valley Systems [#1691] This study compares valley topography and geomorphology using Viking, Mars Orbital Camera (MOC), and Mars Orbiter Laser Altimeter (MOLA) data sets to constrain the geologic nature and origin of the Martian crustal dichotomy.

108 33rd LPSC Program Mest S. C. Crown D. A. Harbert W. Fluvial Degradation of the Highlands: The Terra Tyrrhena Region of Mars [#1892] Geologic and geomorphic analyses of highland terrains reveal the effects of fluvial erosion by well-integrated valley networks. Hydrologic modeling using 128 pix/deg MOLA gridded topography is being done to quantitatively characterize these systems.

Irwin R. P. III Howard A. D. Maxwell T. A. Craddock R. A. Drainage Basin Disruption and Re-Integration Processes in the Martian Highlands [#1729] Cratering competed with fluvial erosion in the Martian highlands, minimizing valley length and catchment area. The location of craters within older watersheds yielded characteristic terrain morphologies, consistent with precipitation and runoff.

Russell P. Head J. W. III Unusual Dendritic Ridged Terrain in Utopia Planitia: Dewatering of Mega-Lahars? [#2032] Dendritic ridges emerge from the edges of plateaus along the margins of proposed mega-lahar deposits, and terminate in fan-shaped lobes. These features are interpreted to result from dewatering of lahars soon after emplacement.

Kuzmin R. O. Greeley R. Nelson D. M. Mars: The Morphological Evidences of Late Amazonian Water Activity in Shalbatana Vallis [#1087] Analyses ofN/A MOC images for Shalbatana Vallis show that the a fluvial processes in the cpannel (after Early Amazonian) were gradually superseded by a groundwater seepage resulted in the formation of extensive taluses deposits on the channel's walls.

Leverington D. W. Craddock R. A. The Outlets of Glacial Lake Agassiz: Possible Terrestrial Analogs for Catastrophic Drainage Systems on Mars [#1091] Recent findings regarding massive freshwater releases from glacial Lake Agassiz are being used to help understand processes associated with ponding and catastrophic outbursts on Mars.

Grin E. A. Fike D. Cabrol N. A. New Evidence Supporting an Ice-covered Lake in Gusev Crater [#1145] The morphology and setting of a groove in Gusev strongly supports the hypothesis of a lateral channel generated by meltwater flowing against an ice covered lake margin. The size of the groove and the slope of the bed independent of the topography of the crater are consistent with modest discharges.

DeHonR. A. Martian Sedimentary Basins and Regional Watersheds [#1915] Mars is divided into eleven regional-scale watersheds that feed low-lying regions as penultimate sedimentary traps. These closed, topographic basins served as major sedimentary provinces.

Kimura H. Abe Y. Abe-Ouchi A. Role of Ocean on Planetary Climate: An Implication for Ancient-Mars [#1731] The effect of ocean size on water circulation is investigated using the global circulation model (GCM). It is shown that the precipitation pattern is controlled by relative position of ocean edge and the extent of the Hadley-cell.

Urquhart M. L. Gulick V. C. Heat Flow, Thermal Conductivity, and the Plausibility of the "White Mars" Hypothesis [#1680] Due to the low thermal conductivity of C02 ice and clathrate vs. water ice, we find that liquid water reservoirs would not be confined to the deep subsurface as predicted by the controversial "White Mars" model, even assuming low global heat flow.

33rd LPSC Program------109

'. Mars Remote Sensing

Neumann G. A. Smith D. E. Zuber M. T. Two Mars Years of Clouds Detected by the Mars Orbiter Laser Altimeter [#2055] MOLA operated as an atmospheric lidar as well as an altimeter. We present results spanning two Mars years of observations, and some observations concerning cloud waveforms and snow.

Bandfield J. L. Global Mineral Distributions on Mars [#1082] Thermal Emission Spectrometer data has been used to produce surface emissivity and mineral concentration global maps.

Wyatt M. B. McSween H. Y. Jr. Andesite or Weathered Basalt? Martian Surface Compositions from MGS-TES [#1702] We examine an alternative hypothesis that the martian surface is entirely dominated by basaltic compositions that differ in their relative degree of low-temperature aqueous alteration.

Kirkland L. E. Herr K. C. Ward J. Keirn E. R. Hackwell J. H. McAfee J. M. Surface Composition of Mars: Results from a New Atmospheric Compensation Technique Applied to TES [#1220] Before TES spectra can be used to model surface compositions, they have a strong atmospheric compensation applied. We explore a very different atmospheric retrieval process, and compare results and implications for the derived surface composition.

Gaddis L. R. Staid M. I. Titus T. N. Compositions of Geologic Units in Central Valles Marineris, Mars: Demixing Analyses ofTES Data [#1784] We applied multiple endmember demixing to Thermal Emission Spectrometer (TES) data to determine the composition of geologic units in the Central Valles Marineris (CVM), Mars. The goal is to study the origins of CVM dark deposits as well as interior and wall layered deposits.

Hogan R. H. Roush T. L. SOM Classification of Martian TES Data [#1693] A classification scheme based on unsupervised self-organizing maps (SOM) is described. Results from its application to the ASU mineral spectral database are presented. Applications to the Martian TES data are discussed.

Mellon M. T. Kretke K. A Smith M.D. Pelkey S.M. A Global Map of Thermal Inertia from Mars Global Surveyor Mapping-Mission Data [4H416] TES has obtained high spatial resolution surface temperature observations from which thermal inertia has been derived. Seasonal coverage of these data now provides a nearly global view of Mars, including the polar regions, at high resolution.

Burt D. M. Hydrogen Loss in Iron-bearing Mars Clays (or Palagonite) is Oxidation, not "Dehydroxylation" [#1242] The strongly oxidizing surface of Mars means that any ferrous clays have lost hydrogen, forming oxy-clays that might be difficult to detect by spectroscopy. This oxidation reaction has misleadingly been labelled "dehydroxylation", which refers to thermal decomposition.

Cooper C. D. Mustard J. F. Sulfates on Mars: Comparing TES and ISM Results [#1997] ISM 3 f1ID water band strengths are compared toTES spectral features that fit cemented sulfate soils. Sulfate endmember exists only with high water abundances, strengthening the argument for sulfate detection.

110 ------33rd LPSC Program Lane M.D. Upcoming THEMIS Investigation of Salts on Mars [#1749] Carbonates, sulfates, and chlorides have been proposed to occur on Mars. THEMIS data should enable these salt mineral groups to be discriminated. However, the low spectral resolution may disallow specific chemical identification.

Masarik J. Brueckner J. Reedy J. R. Simulation of Expeted Gamma Ray Fluxes from Mars [#1646] The fluxes of cosmic-ray-produced gamma rays escaping from the martian surface were calculated for various expected chemical compositions , 8 water contents and 6 thicknesses of the atmosphere.

Sanin A.. Anfimov D. Litvak M. Kozyrev A. Mitrofanov I. Boynton W. Hamara D. Saunders R. S. [INVITED] Large Enhancement of Martian Neutron Albedo During the Poweiful Solar Particle Event of November 23-26, 2001

Kozyrev A. Anfimov D. Litvak M. Mitrofanov I. Sanin A. Bamblevski V. Krylov A. Timoshenko G. Shvetsov V. Tsygan A. Boynton W. Saunders R. S. [INVITED] Expected Sensitivity for Shallow Water Detection by HEND for the Mapping Stage of the Odyssey Mission

Mars Aeolian and Atmospheric Processes

Gendrin A. Erard S. Combe J-P. Despan D. Looking for Pressure Waves in the Martian Atmosphere- A Comparison of ISM and MOLA Data Sets [#1229] Topographic estimates of Mars derived from spectral observations by ISM are compared with direct topography measurements by MOLA. Variations of pressure consistent with pressure waves or Lee vortices are evidenced over the Tharsis volcanoes.

Withers P. Lorenz R. D. Neumann G. A. Errors in Viking Lander Atmospheric Profiles Discovered Using MOLA Topography [#1294] Each Viking lander measured a topographic profile during entry. Comparing to MOLA, we find a vertical error of 1-2 km in the Viking trajectory. This introduces a systematic error of 10-20% in the Viking densities and pressures at a given altitude.

Ringrose T. J. Towner M. C. Zarnecki J. C. Convective Vortices on Mars: A Reanalysis of Viking Lander 2 Meteorological Data, Sols 1-50 [#1180] On 7th August 1976 the Viking 2lander touched down at Utopia Planitia, Mars. We have reanalysed Viking lander 2 meteorological data, and it is the object of this research to give not only annual but diurnal statistics of convective vortex formation for the Viking 2landing site.

Ringrose T. J. Zarnecki J. C. Martian and Terrestrial Dust Devils [#1183] When dust devils or convective vortices form they can be identified by specific meteorological parameters, a 'signature'. If martian and terrestrial dust devil signatures are compared similarities can be identified.

Biener K. K. Geissler P. E. McEwen A. S. Leovy C. Observations of Martian Dust Devils in MOC Wide Angle Camera Images [#2004] As part of a systematic search for surface changes in wide angle MGS MOC images, we have begun a global survey of Martian dust devil activity in order to better understand their frequency, location, sizes and seasonal variations.

33rd LPSC Program 111 Bridges N. T. Phoreman J. Greeley R. Laity J. E. White B. R. Wilson G. R. The Study of Martian and Terrestrial Rock Abrasion from Wind Tunnel Studies: Preliminary Results [#1521] Wind tunnel studies in which analog rock materials are being abraded under controlled conditions are being pursued. Here, we report on the setting up of the experiments and targets, calibration runs, and high speed video analyses of particle impacts onto angled faces.

Chappelow J. E. Sharpton V. L. Pitiss S. E. Kettner M. Aeolian Activity Within the Northeastern Portion of the Hematite Region: Evidence from the Analysis of Small Impact Craters [#1798] The northeast portion of the Hematite-rich Sinus Meridiani region of Mars may represent an ancient ejecta blanket deposit that has experienced continual but modest resurfacing by aeolian activity over the last few billion years.

Mars Future Instruments and Missions

McEwen A. S. Delamere W. A Eliason E. M. Grant J. A. Gulick V. C. Hansen C. J. Herkenhoff K. E. Keszthelyi L. Kirk R. L. Mellon M. T. Squyres S. W. Thomas N. Weitz C. HiRISE: The High Resolution Imaging Science Experiment for Mars Reconnaissance Orbiter [#1163] HiRISE, an experiment on the 2005 MRO mission, will provide an unprecedented combination of ground sampling dimension (25-50 em/pixel), signal-to-noise ratio (>100:1 at all latitudes), swath width (5-10 km), partial3-color coverage, >2% coverage of Mars at 1m/pixel or better, and stereo imaging.

Murchie S. Arvidson R. Barnouin-Jha O. Beisser K. Bibring J-P. Bishop J. Boldt J. Choo T. Clancy R. T. Darlington E. H. Des Marais D. Fort D. Hayes J. Lees J. Malaret E. Mehoke D. Morris R. Mustard J. Peacock K. Robinson M. Roush T. Schaefer E. Silverglate P. Smith M. Thompson P. Tossman B. CRISM: Compact Reconnaissance Imaging Spectrometer for Mars on the Mars Reconnaissance Orbiter [#1697] . The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) on MRO will conduct a global survey to find high priority sites, full-resolution measurement of thousands of sites, and tracking of variations in atmospheric and surface properties.

Campbell B. A. Grant J. A. Maxwell T. Radar Penetration in Mars Analog Environments [#1616] A summary of recent work related to radar penetration in volcanic and desert materials, applicable to Mars orbital radar studies.

Martin P. D. Chicarro A F. The ESA Mars Express Mission: Activities Shifting from Hardware to Scientific Operations Preparation [#1495] The Mars Express Science Working Team is shifting its activities from hardware-oriented activities to activities of planning of the science operations of the mission. Some detailed information about the planning activities are given here.

Thompson T. W. Horttor R. L. Acton C. H Jr. Arroyo B. Butman S. Jepsen P. L. Johnson W. T. K. Plaut J. J. W essen R. Vaisnys A. The Mars Express/NASA Project at JPL [#1044] The Mars Express/NASA Project supports ESA's Mars Express Mission by providing portions ofMARSIS, and via US Co-Investigators, software, and studies. The Discovery Program supports developments for ASPERA

112 33rd LPSC Program .. Moller L. E. Kuhlman K. R. Marshall J. R. Towner M. C. The SNOOPY Angle of Repose Experiment: Calibration of an Instrument to Determine the Angle of Repose of Martian Dust [#2015] The present work calibrates the Student Nanoexperiments for Outreach and Observational Planetary Inquiry (SNOOPY) Angle of Repose experiment. Using particulate collection on small marbles, the measured angles of repose compare well to experimental data and theoretical predictions.

Sherman J. Trowbridge K. Waldron A.M. Batt C. A. Kuhlman K. R. The SNOOPY Contradistinctive Copper Experiment: Calibration Results [#1955] The Contradistinctive Copper nanoexperiment was designed to investigate the highly oxidizing and abrasive conditions expected on the surface of Mars. The experiment was conceived in response to the MECA Student Nanoexperiment Challenge in 1999.

Lawrence D. J. Wiens R. C. Moore K. R. Prettyman T. H. Development of an Ultracompact Neutron Spectrometer for Identifying Near-Surface Water on Mars [#1597] We are developing a neutron spectrometer (NS) that can make measurements of near-surface ( <1 m) water and/or hydrated minerals from a rover on Mars. Using neutron transport models, we find that attaching a NS to a rover does not substantially degrade its ability to detect near-surface water.

Calle C. I. Mantovani J. G. Groop E. E. Buehler M.G. Buhler C. R. Nowicki A. W. Development of a Charged Particle Detector for Windborne Martian Dust [#1649] A prototype of an aerodynamic electrometer to measure the electrostatic properties of Martian atmospheric dust has been constructed. The instrument will enable a more thorough understanding of the potential for electrostatic discharge of different materials on Mars.

Haskin L. A. Wang A. Study of Rocks and Martian Meteorite Using the Brassboard of the Mars Microbeam Raman Spectrometer (MMRS) [#1742] A breadboard of a miniaturized, simple, robust, easily deployed laser rnicrobeam Raman spectrometer for on-surface mineralogy and carbon and water detection has been built. Here's what it can do on rocks.

Hubble H. W. Ghosh M. Sharma S. K. Horton K. A. Lucey P. G. AngelS. M. Wiens R. C. A Combined Remote LIES and Raman Spectroscopic Study of Minerals [#1935] In this paper, we explore the use of remote LIBS combined with pulsed-laser Raman spectroscopy for mineral analysis at a distance of 10 meters. Samples analyzed include: carbonates (both biogenic and abiogenic), silicates, and sulfates.

Wiens R. C. Arvidson R. E. Blacic J.D. Chevrel S. Cremers D. A. Brennetot R. Maurice S. Newsom H. Critical Issues in Martian Geochemistry Involving Minor and Trace Elements, and the Applicability of Laser-induced Breakdown Spectroscopy (LIES) [#1348] Mars exploration requires minor and trace element capabilities to understand the origin of the S-rich dust component, the nature of the oxidized crustal component, and to find exobiology markers. LIBS detection limits are well suited for these.

Wang A. Valentine R. B. Seeking and Identifying Phyllosilicates on Mars- A Simulation Study [#1370] In a simulation of seeking phyllosilicates on Mars, terrestrial ocean sediments were found to provide high quality Raman spectra of clays with low interfering fluorescence because most organic residues had been converted to graphitic carbon.

33rd LPSC Program 113 Zent A. P. Quinn R. C. Grunthaner F. J. Hecht M. H. Buehler M.G. McKay C. P. Ricco A. J. Mars Atmospheric Oxidant Sensor (MAOS): An In-Situ Heterogeneous Chemistry Analysis [#1423] We describe a chemometric array sensor, the Mars Atmospheric Oxidant Sensor (MAOS) that is designed to measure the oxidation rate of thin films on the martian surface. MAOS will discriminate among leading hypotheses for oxidant production.

Schieber J. Krinsley D. Tennison E. Provenance Studies of Fine-Grained Sediments with Scanned Cathodoluminescence of Quartz: Potential Applications in Planetary Exploration [#1088] Scanned cathodoluminescence (SEM-CL) can be used to identify quartz grains derived from principal source rocks (metamorphic, plutonic, volcanic). SEM study of quartz surface textures provides information about transport processes and environment.

Mickelson E. T. Lindstrom D. J. Allton J. H. Hittle J.D. Cleaning and Cleanliness Verification Techniques for Mars Returned Sample Handling [#1305] Precision cleaning and cleanliness verification techniques are examined as a subset of a comprehensive contamination control strategy for a Mars sample return mission.

Allen C. C. Tsapin A. I. Kuebler K. Haskin L. Wang A. Analysis Inside the Box -Studying Rock and Soil in Biological Quarantine [#1222] Non-destructive, non-contact analysis of rock and soil samples, using X-ray tomography and Raman spectroscopy, can yield geologically useful information. Such techniques may be required for preliminary characterization of samples returned from Mars.

Jurewicz A. J. G. Forney L. Bomba J. Vicker D. Jones S. Yen A. Clark B. Gamber T. Goreva J. Minitti M. Sharp T. Thornton J. M. Willcockson B. Zolensky M. Leshin L.A. Investigating the Use ofAerogel Collectors for the SCIM Martian-Dust Sample Return [#1703] SCIM pr.oposes to return Martian dust and atmospheric samples to Earth. The collection will occur during a high- speed pass of Mars( cf. STARDUST). We disuss the engineering challenges that the Martian atmosphere imposes on this type of experiment, and how we are proceeding to meet them.

Leshin L.A. Yen A. Bomba J. Clark B. Epp C. Forney L. Gamber T. Graves C. Hupp J. Jones S. Jurewicz A. J. G. Oakman K. Rea J. Richardson M. Romeo K. Sharp T. Sutter B. Thiemens M. Thornton J. Vicker D. Willcockson W. Zolensky M. Sample Collection for Investigation of Mars (SCIM): An Early Mars Sample Return Mission Through the Mars Scout Program [#1721] The Sample Collection for Investigation of Mars (SCIM) mission is designed to ( 1) make a -40 km pass through the Martian atmosphere, (2) collect dust and atmospheric gas, and (3) return the samples to Earth for analysis.

Isotopes, Gases, and Presolar Grains

Alexander C. M. O'D. The Carrier of the 54Cr Anomaly- Ubiquitous and Uniform in Composition [#1872] We find the same anomalous Cr in the organic-rich residues of Orgueil, Murchison and Tagish Lake.

Smith J. B. Russ G. R. Isotopic Study of Silicon Carbide in Semarkona [#1789] We have measured Si and C isotopes for individual SiC grains from Semarkona. Our results are compared with those of previous studies on SiC from Murchison and Orgueil. Metamorphism and grain-size distribution can affect these comparisons.

114 ------33rd LPSC Program Fisenko A. V. Verchovsky A. B. Semjonova L. F. Ott U. Wright I. P. Fillinger C. T. A New Isotopically Normal Heavy Noble Gas Component in Presolar Diamonds from Boriskino Revealed by Grain Size Separation [#1647] We found a new Xe component in presolar diamonds from Boriskino chondrite.

Verchovsky A. B. Gilmour J.D. Holland G. Sephton M.A. Wright I. P. Franchi I. A. Search for Q: Single Grains Xe Isotope Analysis of Carbonaceous Residue from Yilmia [#1657] We analyse Xe in single grains in HF-HCl residue from Yilmia using RELAX mass spectrometer.

Busemann H. Baur H. Wieler R. Phase Q-A Carrier for Subsolar Noble Gases [#1462] We discuss noble gases in the E-chondrite St. Mark's indicating that the subsolaF component does not exclusively reside in enstatite. Element and isotope abundances including He are presented. Fractionation probably took place prior to incorporation.

Between a Rock and a Cold Place

Abe M. Ohba Y. Ishiguro M. Hasegawa S. Fuse T. Aoki K. Ohyama Y. Kashikawa N. FOCAS Team Tokunaga A. Goto M. Usuda T. Terada H. Kobayashi N. IRCS Team Fujiwara A. Physical Model and Taxonomic Type of 1998 SF36, the Target Asteroid of Sample Return Mission, MUSES-C [#1666] 1998 SF36 is a target asteroid of sample return MUSES-C mission. We report the pole orientation, axis ratio, taxonomic type, absolute size and geometric albedo of this asteroid from our ground based observations.

Lederer S.M. Domingue D. Jarvis K. S. Larson S.M. Vilas F. French L. M. A Phase Angle Study of MUSES-C Target 25143 ( 1998 SF36) [#1956] We have conducted an extensive observing campaign to characterize asteroid 25143 (1998 SF36), the current target of the MUSES-C Japanese mission designed to rendezvous with and sample an NEA. We are employing a Hapke model to gain insights into the physical characteristics of this object.

Mantz A. B. Sullivan R. J. Veverka J. Downslope Regolith Movement in Craters on Eros [#1851] Bright patches on steep crater walls on Eros have been attributed to the downslope movement of space-weathered regolith, revealing less weathered material. Here we report observations designed to constrain the origin of these features.

Burbine T. H. McCoy T. J. · Jarosewich E. Sunshine J. M. Spectral Measurements of Meteorite Powders: Implications for 433 Eros [#1359] We are re-examining the regions defined by different meteorite classes in Band Area Ratio plots by measuring more meteorite samples. These data will allow us to better determine asteroid compositions from spectral measurements.

Clark C. S. Maps with Constant Scale Natural Boundaries and the Asteroid Eros [#1794] I provide a method, based on principles of anamorphic sculpture, of constructing maps, distinct from conventional projections, of irregular solids. I also present and discuss tectonic Earth maps, topographic Eros maps, and other maps.

Robinson M.S. Bussey D. B. J. Edmonds J. Lutsey J. Milne A. Moore K. Prockter L. Wilcox B. NEAR MSI Mosaics of 433 Eros [#1671] We have produced over 300 handlaid mosaics of Eros with resolutions ranging from -20 rn/pixel down to 2 em pixel. These data are available to assist both the science community and education and outreach activities.

33rd LPSC Program ------115 Wilcox B. Robinson M.S. Thomas P. C. Lunar Boulders Seen at Very High Resolution: Implications for 433 Eros [#1637] We have studied 150 very high resolution ( -1 rnlpixel) Lunar Orbiter (LO) frames keying on the identification and spatial relations of boulders and craters.

Howington-Kraus E. Kirk R. Soderblom L. Geise B. Oberst J. Comparison of USGS and DLR Digital Elevation Models of Comet Borrelly [#1983] Deep Space 1 team members at the USGS and DLR have each produced a stereo digital elevation model (DEM) of Borrelly. We outline the methodologies used to produce each DEMand present a quantitative statistical comparison.

Surprising Things in Small Packages

King D. T. Jr. Petruny L. W. Goodwater (Alabama) Superbolide of 5 December I999 [#1882] The Goodwater Superbolide of 5 December 1999 illuminated a large area of the southeastern U.S. beginning at about 04:18AM CST (10: 18 UT). Numerous witnesses saw, heard, and felt this event, but no meteoritic debris has been found.

Benoit P. H. Sears D. W. G. Franzen M. Czlapinski J. Godsey R. D. Meyer M. C. Straughn A. Metal-Silicate Fractionation in Chondritic Meteorites: Experiments Under Microgravity Conditions [#1633] Size-sorting has been observed in metal and chondrules in chondrite classes. We examine the concept of gas flow separation of grains on a parent body under reduced gravity.

Nolan M. C. Howell E. S. Margot J-L. Ostro S. J. Benner L.A. M. Giorgini J.D. Campbell D. B. Arecibo Radar Observations of Near-Earth Asteroids: A Study in Heterogeneity [#2025] Characterization of the rotation state and structure of near-Earth asteroids through radar observations using the Arecibo and Goldstone planetary radar systems shows the remarkable variety of these objects, and suggests variety of formation and modification mechanisms.

Donovan C. Gaffey M. J. Henderson G. Bergeron M.A. Investigating the Phyllosilicate Mineralogy of Low Albedo Asteroids [#1698] Methodology and calibrations are being developed to identify specific clay mineral species in the CCD spectra of dark asteroids. This will constrain the geologic processes within their parent bodies and the production or alteration of organic molecules within such asteroids.

Nelson R. M. Hapke B. W. Smythe W. D. Hale A. S. Piatek J. L. The Opposition Effect: Laboratory Studies Compared to Theoretical Models [#1816] Laboratory measurements of the reflectance phase curve, a measurement of great importance in understanding the texture of planetary regoliths, are not consistent with widely accepted theoretical models.

Hale A. S. Nelson R. M. Smythe W. D. Piatek J. L. Hapke B. W. Laboratory Studies of the Opposition Effect: Measurements of Well-sorted Particles Smaller and Larger than the Incident Wavelength [#1383] We have studied the opposition surge of well sorted diamond powders. All particle sizes show a pronounced opposition surge and evidence for coherent backscatter, in disagreement with theoretical predictions.

Nazzario R. C. Hyde T. W. Orbits of Dust Ejecta from Ceres [#1098] The question of whether asteroid ejecta can enter stable orbits about the parent body is examined.

116 ------33rd LPSC Program Kuzmitcheva M. Y. Ivanov B. A Inventory of Minor Bodies in Solar System [#1005] In the abstract submitted here we compare the lunar-derived projectile size-frequency distribution with the known populations of minor bodies.We also compare a steep-slope part of the distribution with the annual flux of terrestrial meteoroids.

Hikida H. Mizutani H. Tensile Strength of Asteroids Predicted from the Relation ofAsteroid Size and Spin Period [#1444] We examine whether the relationship between the size and the spin period of an asteroid is controlled by the centrifugal stress within the asteroid and estimate a tensile strength of an asteroid as a function of its size.

Erard S. Poulet F. ?hobos NeadR Photometry [#1474] Unusual values of the opposition effect on Phobos derived by Simonelli et al. 1998 are tested using ISM observations in the NIR, and do not appear consistent. A Deimos-like opposition surge provides acceptable values for the other Hapke parameters.

Tepliczky I. Kereszturi A Signs of Changes in the Electrostatic Sedimentation on Eros [#1656] We analysed some anomalous terrace-like regolith structures on Eros and suggest that these strange surface structures can formed by changes in the electrostatic levitation and sedimentation.

Sickafoose A A Colwell J. E. Horanyi M. Robertson S. Dust Levitation in a Plasma Sheath Near a Suiface [#1743] Dust particles on planetary surfaces may become charged and move under the influence of the electric force in plasma and photoelectron sheaths. We report on experimental and theoretical studies of the levitation and transport of dust.

Sarneczky K. Kereszturi A. "Global" Tectonism on Asteroids? [#1381] Here we report our first results of the comparison of the three greatest linear structures: the Towsend Dorsum on Ida, the Rahe Dorsum on Eros, and the Kepler Ridge on Phobos.

Rivkin A S. Davies J. K. Calculated Water Concentrations on C-Class Asteroids [#1414] We have spectroscopically determined the water concentrations for surfaces of 13 C and related asteroids using relations previously found for meteorites. We find that in general the observed asteroids have less water than the average CM meteorite.

Howell E. S. Rivkin A S. Cohen B. A Taking Another Look at the 3-Micron Absorption Band on Asteroids [#1809] Improved 3 micron spectra show that band depths have been underestimated. Using a revised continuum, the asteroid and meteorite spectra match better.

O'Brien D.P. Greenberg R. Constraining the Size-dependent Removal Rate of Asteroids from the Main Belt [#1920] We use estimates of the main belt and NEA size distributions and develop a simple analytical method to calculate, from these estimates, the rates at which bodies are removed from the main belt and transferred to near-Earth space as a function of diameter.

33rd LPSC Program------117 Ueda Y. Hiroi T. Pieters C. M. Miyamoto M. Changes of Band I Center and Band II!Band I Area Ratio in Reflectance Spectra of Olivine-Pyroxene Mixtures Due to the Space Weathering and Grain Size Effects [#2023] Space weathering and grain size effects have been shown to influence the Band I center vs. BIIIBI area ratio plot commonly used to estimate the olivine-opx ratio.

Kurahashi E. Sasaki S. Simulation of Space Weathering: Spectral Change of Olivine-Orthopyroxene Mixtures [#1479] To simulate space weathering, we irradiate the 01-Px mixtures by a 6-8-ns pulse laser. The spectral alteration of them is not proportional to the ratio. Space-weathered spectra of 01-Px mixtures can be predicted using their end-member spectra.

Astrobiology

Jurewicz S. R. Wilcox J. Z. George T. Chutjian A. Feldman J. DouglasS. Hanchar J. M. Electron-induced Luminescence and X-Ray Spectrometer (ELXS) System for Life Detection [#1780] The ELXS concept is a novel, portable, micro-instrument targeted for the detection of mineralogic signatures of past water and extinct life on the surface of planetary bodies such as Mars. It is designed to perform rapid, in situ spectroscopy consuming extremely low energy per measurement.

Fuller M. Huang Y. Hydrogen-Deuterium Exchange of Meteoritic Dicarboxylic Acids During Aqueous Extraction [#1678] This study examines the extent of hydrogen-deuterium exchange on dicarboxylic acids during aqueous extraction. Deuterium emichment was observed to be a function of diacid structure as well as 8D.

Warmflash D. Larios-Sanz M. Fox G. E. McKay D. S. Progress in the Use of Rapid Molecular Techniques to Detect Life Forms in Soil: Implications for Interplanetary Astrobiology Missions [#1963] To demonstrate the feasibility of two promising technologies, we have applied Enzyme-Linked Immunosorbent Assay (ELISA) as well as probes that target the 16S rRNA molecule to search for life in terrestrial soil samples, known to contain numerous life forms.

Starke V. McKay D. S. Wentworth S. J. Thomas-Keprta K. L. Carbonate Globules in Columbia River Basalt- The Search for Life in Terrestrial Subsurface Environments as Possible Martian Analogs [#1475] Basalts from the Columbia River (CRB) Plateau contain minor amounts of carbonates of unknown origins. We have examined the petrology and chemistry of the CRB carbonates to elucidate the modes of formation. This study is directly relevant to meteorites and future samples returned from Mars.

Westall F. Kirkland L. Hematite on Mars: Investigations of a Terrestrial Desert Ferricrete Analogue [#1179] Microbially-mediated ferricrete formation in a desert environment in W. Australia is examined (similar spectral signal to "hematite deposit" of Sinus Meridiani) and the possibility of a similar phenomenon on early Mars is considered.

Guidry S. A. Chafetz H. S. Petrography and Stable Isotopic Trend Associated with Mammoth Hotspring Travertine, Yellowstone National Park, Wyoming [#1149] Active Yellowstone travertines and relict travertines from successively older deposits exhibit a strong linear trend in stable isotopic values indicative of geochemical evolution throughout the course of hotspring activity.

118 ------33rd LPSC Program Greenwood J.P. BlakeR. E. Martini A.M. Coomber S. Surkov A. V. Gilmore M.S. Dole H. J. Cameron D.P. Jr. Varekamp J. C. St. Lucia, W.I. Sulphur Springs: An Integrated Microbiological and Geochemical Survey of a Possible Martian Analogue [#2037] A possible martian analogue site is explored.

Hasiotis S. T. Rogers J. R. Goldstein R. H. Traces of Life: Macro- and Microscopic Evidence of Past and Present Biogenic Activity Potentially Preserved in Extraterrestrial Sediments and Rocks [#2054] Martian soils, rocks, and ice may contain micro- to macroscopic evidence in the form of burrows, borings, inclusions, or biofabrics that can confirm the presence of Martian life even if no body fossils or living material are found.

Barbieri R. Cavalazzi B. Westall F. Microbial Fossilization Potential in Chemosynthetic (Cold Seep) Carbonate Rocks: Exopaleontological Implications [#1319] Authigenic carbonates form geological constructions which may preserve most of their microbial contents. Their exobiological interest relies on their being possible terrestrial analogues of ecosystems developed elsewhere outside the Earth.

Ori G. G. Glamoclija M. Barbieri R. Cavalazzi B. Chemosynthetic Ecosystems on Mars, Europa, and Titan [#1510] Chemosynthetic (chemotrophic) communities, which live in environments barren of free oxygen and light, are good candidates to develop prominent living systems in the Solar System.

Heymann D. Are Biogenic PARs Precursors for Fullerenes on Earth? [#1076] C60 fullerene in shungite and in bitumen from the Bohemian Massif could have formed in situ in two steps: 1. Cyclotrimerization of the P AH C20Hl2. 2. Dehydrogenation of C60H30 to C60. The necessary heat was provided during metamorphism.

Hill H. G. M. Grady C. A. Nuth J. A. III HeapS. R. Observational Evidence for Very Large-scale Dust and Gas Transport in Protostellar Nebulae [#1247] A vast transport system may have existed in the Solar nebula capable of carrying great quantities of dust from the warm, inner nebula to beyond the snowline. We are testing this hypothesis by observing winds around nearby protoplanetary disk systems.

Gilmour I. Hill H. G. M. Pearson V. K. Sephton M.A. Nuth J. A. III Production of High Molecular Weight Organic Compounds on the Surfaces ofAmorphous Iron Silicate Catalysts: Implications for Organic Synthesis in the Solar Nebula [#1613] The high molecular weight organic products ofFischer-Tropsch/Haber-Bosch syntheses on the surfaces of Fe-silicate catalysts have been studied by GCMS.

Jakosky B. M. Phillips R. J. Water and Climate on the Terrestrial Planets, and Implications for Life Elsewhere [#1195] We use the diversity of outcomes of terrestrial planet outcomes in our own solar system to understand processes that control the outcome. This will allow us to understand the range of possible outcomes in other planetary systems and the implications for the potential for life elsewhere.

LermanL. M. Consequences & Artifacts: Terrestrial Findings and Martian Analogues of an Air-Water InteJface [#2062] On a Mars lacking long-lived tectonic processes and oceans, if chemical self-organization occurred at all it was likely a consequence of a bubble-aerosol cycle analogous to the terrestrial. This is true for any planet having any liquid water due to the chemical physics of an air-water interface.

33rd LPSC Program------119 Nedachi M. Nozaki J. Hoashi M. Nedachi Y. Hidaka H. Ohmoto H. The Loss of Iron from the 2. 7 Ga Mt. Roe Paleosols (Pilbara, Australia) by Methane-rich Hydrothermal Fluids [#1971] Chlorite-sericite zone of the Mt.Roe basalt in Pilbara is famous as Archean Paleosol formed under anoxic atmosphere. We found that the sericite zone is a hydrothermal production and oxic environment is expected for the Archean atmosphere.

Chicarro A. F. ESA Science Team The Mars Express Mission and Astrobiology [#2074] ESA and the scientific community have performed concept and feasibility studies for more than 10 years on potential future missions to Mars. The Mars Express mission will address the issue of astrobiology both directly and indirectly.

Glavin D. P. Schubert M. Botta O. Kminek G. Bada J. L. Detecting Pyrolysis Products from Bacteria on Mars [#1094] A Mars soil analogue inoculated with E. coli was heated at 500°C under Martian ambient pressure to isolate volatile amine compounds from the cells. Our results suggest that -30 million bacterial cells per gram of Martian soil would not have been detected by the Viking GC/MS instruments.

Clash of the Titans

LorenzR. D. Tectonic Titan: Landscape Energetics and the Thermodynamic Efficiency of Mantle Convection [#1165] Titan's surface forged, not by blows but by churning. Carnot tells us why.

Pargamin J. Mousis O. Grasset O. Experiments in the NHTH20 System in the [0-1 GPa] Pressure Range- Implications for the Deep Liquid Layer of Large Icy Satellites [#1461]

Experiments in the NHrH20 system show that peritectic melting temperature undergoes a jump between 450 and 500 MPa. These results shed new light on the internal structure of Titan, especially the fact that the ocean might be thinner than expected.

Castillo J. Rappaport N. Mocquet A. Sotin C. Clues on Titan's Internal Structure from Cassini-Huygens Mission [#1989] This presentation estimates which aspects of Titan's internal structure will be derived from gravity potential measurements by Cassini-Huygens. In that purpose, dynamic Love numbers are computed for various models of the satellite.

Roush T. R. Dalton J. B. Reflectance Spectra of Titan Tholins at Cryogenic Temperatures [#1525] Spectral behavior of room temperature Titan tho lin is used to model reflectance spectra of outer solar sytems surfaces. We measured the reflectance spectrum of Titan tho lin, -100-310 K, and will discuss the impact on compositional interpretation.

Ice Rocks

Brown R. H. Baines K. Bellucci G. Bibring J-P. Buratti B. Capaccioni F. Cerroni P. Clark R. Coradini A. Cruikshank D. Drossart P. Formisano V. Jaumann R. Matson D. McCord T. Mennella V. Nelson R. Nicholson P. Sicardy B. Sartin C. Chamberlain M. Near-Infrared Spectroscopy of Himalia- An Irregular Jovian Satellite [#2001] Spectra of the irregular Jovian satellite Himalia were obtained with the Visual and Infrared Mapping Spectrometer (VIMS) onboard Cassini during the Jupiter Flyby on December 18-19, 2000. These are the first spectral data of an irregular satellite beyond 2.5 microns.

120 33rd LPSC Program Peek K. Hahn J. M. Disruption of a Small Icy Satellite and the Evolution of the Resulting Debris Ring [#1584] We examine the likelihood of a Saturnian satellite evolving, with its disruption by cometary impact, into a significant contributor to Saturn's rings. While not a viable formation scenario, the dynamics and probabilities still proved interesting.

Stooke P. J. Tethys and Dione: New Geological Interpretations [#1553] Newly reprocessed images of the full Voyager image sets of Tethys and Dione fill blanks in existing maps and reveal new details of albedo patterns, impact basins and tectonic features. Tethys has more complex albedo distribution than can be accounted for by simple exogenic processes.

Jarvis K. S. Vilas F. Buratti B. J. Hicks M.D. Gaffey M. J. Hyperion 's Dark Material: Rotational Variation [#1667] We present 2 new dark material spectra of Hyperion compared with previously published dark material spectra of Hyperion and Iapetus. A 0.67-micron absorption feature is seen in one of the two new spectra. This suggests possible mineralogical differences across the surface of this Saturnian satellite.

Three Icy Moons

Mizser A. Kereszturi A. Approach of Oceanic Current Directions Inside Europa [#1227] Based on the example of Io and theoretical reasons the heat flux on a tidally heated body is greater at smaller than higher latitude and concentrated into hot spots. These and the Corio lis-force have effect on the oceanic currents on Europa.

BakerL. L. Hydrothermal Chemical Fluxes in a Europan Ocean [#1251l The composition of a Europan ocean is likely to be controlled by hydrothermal exchange processes similar to those occurring in the terrestrial oceans. These fluxes, and possible differences, are being modeled.

Kimura J. Kurita K. The Thermal Anomaly at the Base of Internal Ocean Caused by Hydrothermal Circulation in Europa [#1492] Hydrothermal plume at the base of internal ocean in Europa has been investigated from numerical simulations.

Tobie G. Choblet G. Mocquet A. Pargamin J. Sotin C. Tidally Heated Convection Within Europa's Ice Shell [#1498] Numerical experiments are conducted with a 2D-thermal convection numerical model including a viscosity- dependent internal heating (tidal heating) to understand the impact of tidal heating on convective instabilities within Europa's ice shell.

Mitri G. Flows in the Europa Crustal Hydrosphere: Radial and Libration Tide Effects [#1537] This work shows the importance for geodynamics for Europa of the radial and the libration tides. Pressure gradients can drive flows in the crustal hydrosphere.

Hurford T. A. Jr. Greenberg R. Tides on a Compressible Sphere: Sensitivity of the H2 Love Number [#1589] Love derived tidal amplitudes by solving the continuum displacement equation which was simplified by his assumption of incompressibility. We derive tidal amplitudes using a more general displacement equation, accounting for compressibility.

33rd LPSC Program------121 Stempel M. M. Pappalardo R. T. Lineament Orientations Through Time near Europa's Leading Point: Implications for Stress Mechanisms and Rotation of the ley Shell [#1661] We evaluate lineaments near Europa's leading point based on the hypothesis that they formed as conjugate shears in the Equatorial Compression Zones; we infer that Europa's surface deformation occurred during -90 degrees of nonsynchronous rotation.

Figueredo P. H. Greeley R. Insights into Europa's Resurfacing from Geologic Mapping of the Trailing Antijovian Hemisphere [#1068] Pole to pole geologic mapping revealed alternating periods with uniform and variable lineament orientations, 'reset' areas with incipient tectonic resurfacing, several generations of chaos, and the importance of mantling as a resurfacing process.

Prockter L. M. Schenk P. M. Mapping of Europa's Youthful "Dark Spot"- A Potential Landing Site [#1732] We present a geological and topographical analysis for the apparently young El4 Dark spot region, in order to umavel its complex history and determine its suitability as a potential site for a future Europa lander.

Billings S. E. Kattenhorn S. A. Detem!ination of Ice Crust Thickness from Flanking Cracks Along Ridges on Europa [#1813] We use equations describing the deflection of an elastic plate below a line load to estimate ice crust thickness below ridges on Europa. Using a range of elastic parameters, ice thickness is calculated to fall in the range 0.2-2.6 km.

Greenberg R. Sarid A. R. Hurford T. A. Jr. Hoppa G. V. Tufts B. R. Geissler P. Europa's Surface-Area Budget: Identification of Convergence Features by Stike-Slip Reconstructions [#1903] Reconstruction of displaced portions of Europa's surface using strike-slip offsets shows candidate locations where surface convergence has occurred, each of which displays a similar morphological character.

Chapman C. R. Bierhaus E. B. Merline W. J. Styles of Crate ring on Europa [#2005] Secondary cratering dominates the small-crater populations on Europa, even far from the few large primaries. Hence, secondary cratering could be a more important process on other bodies, especially in the outer solar system, than had been thought.

Tiscareno M.S. Geissler P. E. Re-Distribution of Material on the Surface of Europa via Sputtering [#1978] We have developed a model to characterize local sputtering erosion rates on Europa, and have carried out numerical simulations of the trajectories of sputtered water molecules to determine local rates of re-deposition (and thus, of net erosion).

Prieto O. Kargel J. S. Thermal Conductivity and Thennal Diffusivity of Some Hydrated Salts at Low Temperature: Implications for Jupiter's Satellite, Europa [#1726] Salt hydrates may be major constituents of the surface and the crust of the satellite Europa. Their thermal properties contribute to the global thermal state of these layers. Thermal conductivity and thermal diffusvity measurements at low temperature of three hydrated salts are presented.

MitriG. Preliminary Design for a Europa Mission [#1530] This paper discusses the design of a Europa mission. The intention of the mission is to target one surface penetrator on Europa's surface.

122 33rd LPSC Program Domingue D. Hendrix A. Ultraviolet Surface Properties of the Icy Galilean Satellites from Phase Curve Analysis [#1883] The rotational phase curve analyses presented here examine the UV rotational behavior of the icy Galilean satellites and systematically searches for any broadband temporal variability in the ultraviolet properties of these satellites.

Mastrapa R. M. E. Brown R. H. ModelingAmorphization of Crystalline Water Ice on the Surfaces of Ganymede, Callisto, and Europa [#1111] We model the process of converting crystalline water ice into the amorphous phase by ion radiation and apply our results to the icy Galilean satellites.

Hansen G. B. A Method of Measuring Surface Ice Abundance: Application to Ganymede [#1060] A method of measuring spatial surface ice abundance using the Fresnel reflection peak at 3.1 microns is applied to Ganymede.

Dombard A. J. McKinnon W. B. Formation of Grooved Terrain on Ganymede via Extensional Instability: Regional Constraints on Thermal Gradients and Strain Rate [#1865] We update our model of grooved terrain formation with the latest ice rheologies and apply it to bright and dark terrains on Ganymede, finding that groove formation is indeed possible, but only if thermal gradients are quite high (>10 K/km).

McBee J. H. Collins G. C. Stratigraphic Breakdown of Grooves in Western Sippar Sulcus and Leading Hemisphere of Ganymede [#1449] We present age relationships, morphology, and orientation of groove sets in two different regions of Ganymede, one on the leading hemisphere and one on Sippar Sulcus between the antijovian and trailing hemisphere.

Farrar K. S. Collins G. C. Global Mapping of Ganymede Impact Features [#1450] We present a global database of impact features on Ganymede, including newly discovered palimpsests imaged by Galileo. We will discuss crater density in different regions, including the leading-trailing hemisphere asymmetry.

Basilevsky A. T. Morphology of Callisto Knobs from Photogeologic Analysis ofGalileo SSI Images Taken at Orbit C21 [#1014] Measurements of shadows of knobs seen on Callisto images taken at orbit C21 showed that knobs are mostly cones with steepness of their slopes close to the repose angle. This suggests involvement of downslope mass wasting in the knob-forming process.

Hauck S. A. II Dombard A. J. SolomonS. C. Aurnou J. M. Internal Structure and Mechanisms of Core Convection on Ganymede [#1380] We model Ganymede's non-ice interior to better constrain the conditions that can lead to internal magnetic field generation. Compositional core convection can be driven by means other than solid inner core growth.

Thomas C. Ghail R. C. The Internal Structure of Callisto [#1196] We present a new model for the internal structure of Callisto that includes a salty water layer near the surface, based on recent Galileo Orbiter gravity data.

33rd LPSC Program------123 .. Io

Smythe W. D. Lopes R. M. C. Kamp L. W. Leader F. Carlson R. W. NIMS Team Night Time Observations of Io 's Thermal Output from the Galileo Near Infrared Mapping Spectrometer [#2053] The thermal output of Io is mapped using all nighttime observations obtained by Galileo NIMS.

Geissler P. E. McEwen A. S. Keszthelyi L. P. Phillips C. Spencer J. Surface Changes on Io [#1954] We have begun a program to systematically search for surface changes on Io, both from Voyager-to- Galileo and from one Galileo orbit to the next. Here we report preliminary results from this global survey along with a discussion of the most recent surface changes.

Totonchy M. B. A Two- Year Study of Io: Comparing Volcanic Activity and Surface Changes on the Galilean Satellite Io and a Comparison of Volcanic Activity and Suiface Changes to Monitor Tidal Heating on the Jovian Moon Io from 1996- 2001 [#1455] I compared the volcanic activity and surface changes on the Galilean satellite to analyze the· volcanic activity on Io observed by Galileo and Voyager. I found that the volcanic activity on Io has increased during the 21-year period.

Zhang Q. Radebaugh J. Turtle E. P. Keszthelyi L. P. Milazzo M.P. Jaeger W. L. McEwen A. S. Investigation of the Distribution and Characteristics of Ionian Paterae Using a Relational Database [#1745] We are documenting characteristics of Io' s paterae, mountains, and hotspots in a relational database in support of an extensive analysis of patterns in their distribution and how the features are interrelated.

Wilson R. R. Schenk P.M. From Tohil to Inachus: An Ionian Topography Progress Report [#1995] We report on the latest topography on Io including Tohil Mons and estimates of flow rheology on Io.

Stoddard P.R. Jurdy D. M. fa's Volcanoes: Possible Influence on Spin Axis [#1164] Massive outpourings of lava in short intervals could cause an instability in Io's rotation and a reorientation of its spin axis. The volcanos and mountains exhibit a complementary distribution, with the maximum principal inertia axis for volcanos close to the position of the rotation axis.

Zhang J. Goldstein D. B. Varghese P. L. Gimelshein N. E. Levin D. A. Gimelshein S. F. Modeling Low Density Sulfur Dioxide Volcanoes on Jupiter's Moon lo [#1137] The volcanic plume flows on Io are modeled using rarefied gas dynamics. The radiation features are examined by calculating infrared emission spectra along plume axis.

Origins: Stardust to Phyllosilicates

Kuhlman K. R. Fabrication of Genesis Sample Simulants Using Plasma Source Ion Implantation (PSI/) [#1899] Plasma source ion implantation can be used to fabricate simulant samples for the Genesis mission. These simulants will be needed by investigators to validate sample preparation and analysis techniques for the returned Genesis samples.

124 33rd LPSC Program Lunine J. I. Lorenz R. D. A Simple Prescription for Calculating Day-Night Temperature Contrasts on Synchronously Rotating Planets [#1429] Fully 1/3 of the extra-solar planets discovered to date are in close orbits around their parent stars, and hence subject to extreme day-night temperature conditions that affect their properties. We develop a simple prescription for determining the temperature contrasts.

Tunyi I. Guba P. Roth L. E. Timko M. Impulse Magnetic Fields Generated by Electrostatic Discharges in Protoplanetary Nebulae [#1074] We examine quantitative aspects associated with the hypothesis of nebular lightnings as a source of impulse magnetic fields. Our findings support our previous accretion model in which a presence of impulse magnetic fields was of a key necessity.

Future Missions

Anderson J. A. Cook D. A. Thompson K. T. Rapid Geometric Software Development for Scientific Analysis and Cartographic Processing of Planetary Images [#1853] The Integrated System for Imagers and Spectrometers (ISIS) can quickly be adapted to handle camera models for new instruments. Adding a new camera model allows for the use of many standard ISIS geometric and photometric processing applications.

Hare T. M. Tanaka K. L. PIGWAD- OpenGIS and Image Technologies for Planetary Data Analsys [#1365] Planetary Interactive GIS-on-the-Web Analyzable Database (PIGW AD) has been an experimental method for planetary analysis, for data distribution over the Internet, and for educating the planetary community in Geographic Information Systems (GIS).

Eichhorn G. Accomazzi A. Grant C. S. Kurtz M. J. Rey Bacaicoa V. Murray S. S. New Data and Search Features in the NASA ADS Abstract Service [#1298] The NASA-ADS Abstract Service provides search capability for literature in Astronomy/Planetary Sciences, Physics/Geophysics, and Instrumentation. Scanned articles are available for many journals and proceedings. The ADS service is free for anybody.

Wiens R. C. Barraclough B. L. Steinberg J. E. Dors E. E. Neugebauer M. Burnett D. S. Gosling J. Bremmer R. R. Solar-Wind Conditions During the Initial Phase of the Genesis Mission [#1367] We describe solar-wind conditions, including relative fractions of the solar-wind regimes (interstream, coronal hole, coronal mass ejections), during initial Genesis solar-wind sample collection, and give implications for eventual sample analysis.

Butterworth A. L. Chater R. J. Franchi I. A. Laser Ablation of Diamond and Genesis Concentrator Target Material [#1591] UV laser ablations ofCVD diamond using two wavelengths of radiation (266 nm and 213 nm) have been compared. The impetus for this work is the 2004 return of Genesis and extraction of solar-wind oxygen implanted in diamond.

Cardell G. Taylor M. E. Stewart B. W. Capo R. C. Crown D. A. A Combined Laser Ablation-Resonance Ionization Mass Spectrometer for Planetary Surface Geochronology [#2047] Progress in the development of an instrument for direct geochronologic measurements on rocks in situ will be described. The instrument integrates laser ablation sampling, resonance ionization, and mass spectrometry to directly measure concentrations of the Rb-Sr isotope system.

33rd LPSC Program 125 Romstedt J. Torkar K. Riedler W. Arends H. Kassing R. Rtiedenauer F. Abelman L. Barth W. Butler B. Gavira J. Jeszensky H. Siekman M. MIDAS- An Instrument for In-Situ High-Resolution Imaging of Cometary Dust Particles [#1515] The flight model of the MIDAS instrument has been delivered and integrated on the Rosetta spacecraft in Autumn 2001. The instrument will collect and image particles in the environment of comet 46P/Wirtanen.

BrinckerhoffW. B. Mahaffy P.R. Cornish T. J. Cheng A F. Niemann H. B. Harpold D. N. Gorevan S. P. Rafeek S. Yucht D. Dual Source Mass Spectrometer and Sample Handling System [#1544] We present details of a miniature integrated time-of-flight mass spectrometer and sample handling system under development to address some of the needs for in situ sample analysis on landed missions.

Shappirio M. Fitz-Gerald J. Wiens R. C. Nordhold J. E. Cremers D. Ferris M. Development of an Instrument for Isotopic and Elemental Composition Analyses at Stand-Off Distances on Airless Planetary Suifaces [#1968] We will present the result of a study looking at fractionation due to laser ablation at stand off distances in respect to isotopic abundance measurement.

Clark P. E. CurtisS. Rilee M. Truszkowski W. Marr G. ANTS: Exploring the Solar System with an Autonomous Nanotechnology Swarm [#1394] ANTS (Autonomous Nano-Technology Swarm), a NASA advanced mission concept, calls for a large (1000 member) swarm ofpico-class (1 kg) totally autonomous spacecraft to prospect the asteroid belt.

Davies A G. Greeley R. Baker V. Williams K. K. Dohm J. Castano R. Mjolsness E. Roden J. Stough T. Chien S. Sherwood R. Zetocha P. ASC-Techsat 21 Team Automating Operational and Science Analysis Processes with the Autonomous Sciencecraft Constellation [#1130] The Autonomous Sciencecraft Constellation-Techsat 21 mission is a NASA New Millennium Program mission selected for flight in 2004. ASC will autonomously perform science analyses ofX-band radar data, while in Earth orbit.

Garry J. R. C. Wright I. P. In-Situ Temperature Rises Caused by Coring Vapour-Grown C02 Ice [#1797] Temperature rises caused by drilling have been measured in dense cryogenic carbon dioxide ice grown from the vapour phase at low pressures. The magnitude of this affect is also considered for cold water ices.

Sears D. W. G. Franzen M. Bartlett P. W. Kong K. Y. Preble P. DiPalma J. Benoit P. H. · Kareev M. The Hera Mission: Laboratory and Microgravity Tests of the Honeybee Robotics Touch-and-Go Sampler [#1583] We are entering the decade of sample return. The proposed Hera mission will return three samples from each of three asteroids and crucial is the sample collection device. This paper describes recent micro gravity of laboratory tests of the collector.

Nakamura M. Imamura T. Japan's Venus Meteorological Satellite: Planet-C [#1265] A new mission to Venus in the early 21st century was officially approved by the Japanese government in 2001. The mission will bring about a new era of the exploration of Venus meteorology. The overview of the mission will be given.

Imamura T. Nakamura M. Science Goals of the Venus Mission Planet-C [#1266] A Venus meteorological satellite, Planet-C, will be launched in 2007 or 2008. The mission aims at understanding the Venus meteorology using multi-wavelength imaging techniques. The details of the science objectives and observation strategy are introduced.

126 33rd LPSC Program Balogh Zs. Bordas F. Berczi Sz. Di6sy T. Hegyi S. Imrek Gy. Kabai S. Keresztesi M. Manipulator Arms and Measurements with them on Hunveyor College Lander: Soil Hardness Measurements in the Test-Terrain Surrounding the Lander [#1085] We built manipulating arms onto Hunveyor lander in a course, where modular units, special effectors, manipulation space, and soil mechanics, were studied. We made soil hardness measuring experiments in the test-terrain with various soils.

Berczi Sz. Di6sy T. T6th Sz. Hegyi S. Imrek Gy. Kovacs Zs. Cech V. Mtiller-Bod6 E. Rosko F. Szentpetery L. Hudoba Gy. Space Simulators in Space Science Education in Hungary ( 1 ): A Hunveyor Type Planetary Voyage and Planetary Surface Operations Simulator [#1496] Developing a planetary voyage/surface operations simulator on basis of Hunveyor (example was Surveyor) experimental lander, we show framework: "terrestrial" direction/control and "planetary" operations Hunveyor with important activities/peripheries.

Hegyi S. Horvath Cs. Nemeth I. Keresztesi M. Hegyi A. Kovacs Zs. Di6sy T. Kabai S. Berczi Sz. Solar Panel and Electric Power System of Hunveyor-2 University Lander: Experiments for Various Planetary lnsolations [#1124] Construction of 1) electric power system's solar panel, direction and moving, 2) charger unit and power and control system, 3) experiments in various planetary insolation conditions, and 4) a little atlas of the building of Hunveyor is presented.

33rd LPSC Program------127 Friday, March 15, 2002 ORIGINS: STARDUST TO PHYLLOSILICATES 8:30 a.m. Salon A

Chairs: A. K. Speck B. S. Meyer

Kemper F. Jager C. Waters L. B. F. M. Henning Th. Moister F. J.* Barlow M. J. Lim T. de Kater A. Carbonates in Dust Shells Around Evolved Stars [#1193] We report the first extrasolar detection of carbonates, around evolved stars. The conditions exclude aqueous alteration as a formation mechanism. Thus, an alternative formation mechanism exists, which may also be important in the solar system.

Speck A. K.* Kemper F. Whittington A. G. Moister F. J. Herwig F. Fomzation of Presolar Crystalline Silicates: The Effect of26Al [#1197] We investigate whether radiogenic heating by decay of 26 AI can cause the crystallization of amorphous silicate grains in the outflows of evolved stars. The high crystallinity of disk source might be explained by this mechanism.

Cameron A. G. W.* Meteoritic Isotopic Abundance Effects from R-Process Jets [#1112] Supernovas of the kind that triggered the formation of the solar nebula, through their r-process jets, appear to have provided distinct meteoritic abundance signatures: r-process peaks at xenon and the rare earth hump, and a p-process peak at Mo and Ru.

Meyer B.S.* Clayton D. D. Chellapilla S. The L-S. Nucleon-Alpha Particle Disequilibrium and Short-Lived r-Process Radioactivities [#1994] r-Process yields can be extremely sensitive to expansion parameters when a persistent disequilibrium between free nucleons.and alpha particles is present. This may provide a natural scenario for understanding the variation of heavy and light r-process isotopes in different r-process events.

Haghighipour N. * Boss A. p, Dynamical Evolution of Solids in a Marginally Gravitationally Unstable Disk [#1376] We study the radial migrations of small bodies subject to Epstein and Stokes drags in the terrestrial planet region of a marginally gravitionally unstable solar nebula in order to investigate the implications of their migrations for collisional coagulation.

W eidenschilling S. J. * Self-Consistent Models of the Dusty Subdisk in the Solar Nebula: Implications for Meteorites [#1230] The space density and relative velocities in a particle layer in the nebular midplane are constrained by shear-induced turbulence. Chondrule formation appears to require transient deviations from steady-state conditions.

Lindsay B. D.* Hyde T. W. Protoplanetary Migration and Creation of Scattered Planetesimal Disks [#1097] The relationship between protoplanet migration and the formation of the Kuiper Belt (planetesimal disk scattering) is examined.

Hahn J. M.* Ward W. R. Secular Resonance Sweeping in a Self-gravitating Planetesimal Disk, with Application to the Kuiper Belt [#1930] Nagasawa and Ida (2000) have shown that scanning secular resonances can excite large eccentricities and inclinations. We reexamine this phenomena for a planetesimal disk having mass, and it is shown that such excitation is muted by wave propagation.

128 33rd LPSC Program Leya I.* Wieler R. Halliday A. N. Modeling the Production of Be-7, Be-10, and Al-26 by Spallation Reactions in the Early Solar System [#1268] Modeled production rates for 7Be, 1 ~e, and 26Al in CAis from the early solar system are presented. The new results simultaneously describe the measured data and are therefore strong indications of a spallogenic origin for these isotopes.

Clayton R.N.* Photochemical Self-Shielding in the Solar Nebula [#1326] Isotopic variations in meteoritic oxygen and nitrogen may be due to isotopic self-shielding during the photolysis of CO in the nebular gas. Solar oxygen should be 160-rich, like CAis.

Harker D. E.* Desch S. J. Annealing of Pre-Cometary Silicate Grains in Solar Nebula Shocks [#2002] Comets contain crystalline silicate grains which could only have formed at high temperatures, not generally experienced by comets. We test the hypothesis that amorphous silicates were annealed by shock waves in the solar nebula.

Ciesla F. J.* Lauretta D. S. Cohen B. A. Hood L. L. Adiabatic Shock Waves in Icy Regions of the Solar Nebula: Implications for Origins of Phyllosilicate Minerals in Primitive Meteorites [#1243] We re-examine the possibility that phyllosilicate minerals, such as those found in the chondrule rims in CM chondrites, formed in the solar nebula. Specifically, we consider the formation in the presence of water vapor produced by a shock wave that could have also formed chondrules.

Colwell J. E.* Mellon M. T. Experimental Studies of Collisions in Planetary Rings and Protoplanetary Disks [#1757] Collisions in planetary rings and between forming planetesimals can occur at low impact velocities. We report the results of ground- and space-based impact experiments into simulated regolith at speeds below 2.5 rn/s.

33rd LPSC Program------129 Friday, March 15, 2002 MARS: FLOWING ICE, WATER, AND/OR C02 8:30 a.m. Salon B

Chairs: J. Grant N.Hoffman

Hoffman N. * Tanaka K. L.

Co-Existing "Flood" and "Volcanic" Morphologies in Elysium as Evidence for Cold C02 or Warm H20 Outbursts [#1505] Athabasca Vallis is a 2003 MER target, interpreted as a site of recent liquid water outbursts and lava flows. Here, we examine unusual linear cone chains within the flow channels and find that C02 may have had a major role, either alone, or with H20.

Coleman N. M.* Aqueous Flows Formed the Outflow Channels on Mars [#1059] The role of water in carving the martian outflow channels has been questioned by a model based on C02. However, this model is inconsistent with martian observations and analog studies. The channels are monuments to the erosive power of aqueous floods.

Irwin R. P. III* Maxwell T. A. Howard A. D. Craddock R. A. Topographic Controls on Martian Valleys and Lakes [#1705] Through a funneling process, high ridges encouraged development of several large highland valleys. We present evidence for an extensive highland lake that may have overfilled periodically, creating Ma'adim Vallis through episodic flooding.

Stepinski T. F.* Marinova M. M. McGovern P. J. Clifford S.M. The Fractal Characteristics of Martian Drainage Basins: Implications for the Timing, Intensity, artd Duration of Rainfall [#1347] We use properties of drainage networks on Mars as a measure of martian landscape morphology and an indicator of landscape evolution processes. Our results indicate that martian terrains evolved by combination of rainfall-fed erosion and impacts.

Parker T. J.* Grant J. A. Anderson F. S. Franklin B. J. MOLA Topographic Evidence for a Massive Noachian Ocean on Mars [#2027] If the topographic terraces described are coastal, an ocean upwards of 5 to 7 km deep would be required by the maximum elevation of terraces identified south of Elysium Planitia. The highest terrace identified to date is at 2200 m elevation.

Grant J. A.* Parker T. J. Evolution of the Uzboi-Ladon-Margaritifer Valles Meso-Scale Outflow System, Mars [#1152] Mapping results indicate that the Uzboi-Ladon-Margaritifer meso-scale outflow system was dominated by multiple, high magnitude discharge events that delivered water to Margaritifer Basin where it was stored and later released to form Ares Vallis.

Palmero A.* Sasaki S. Miyamoto H. Geomorphic Evidence Supportive of Underground Conduits on Mars [#1418] Complex underground conduit networks in the vicinities of the Ganges Chasma have been identified. These networks seem to have played an important role in the surface landscaping as well as the origin and evolution of some Chaotic terrains and Chasmata.

130 ______33rd LPSC Program Russell P.* Head J. W. III The Martian Hydrosphere!Cryosphere System: Implications of the Absence of Hydrologic Activity at Lyot Crater [#1688] A martian cryosphere able to confine groundwater under hydraulic pressure implies that major disruption, as by impact, may allow effusion of water to the surface. Lack of hydrologic activity at Lyot Crater suggests possible refinements to the model.

Burr D. M.* McEwen A. S. Kesztheyli L. P. Lanagan P. D. Extensive Aqueous Flooding from the Cerberus Fossae, Mars, and Its Implications for the Martian Hydrosphere [#1047] Three aqueous flood channels are evidence for multiple floods around the Cerberus Plains, Mars. Two, possibly all three, of these flood channels originate at the Cerberus Fossae volcano-tectonic fissures.

Reiss D. J aumann R. * Characteristics of Groundwater Aquifers in the Nirgal Vallis Drainage Basin [#1606] MOLA- and MOC-data have been used to estimate the topographic position of sapping pits and gully heads on the rim of Nirgal Vallis. The position of two aquifers have been identified and used to derive the dip and development of the groundwater level.

Metzger S. M. * Paleodischarge Modeling of the Argyre Ridge Esker Model [#2045] Throughout the past decade the sinuous ridges on the floor of the Argyre Basin have drawn considerable interest as potential remnants of processes that recorded key events in the ancient Martian climate. This report calculates paleoflow discharge that may have formed the Argyre ridges.

Milliken R. E.* Mustard J. F. Goldsby D. L. Examination of Viscous Flow Features on the Surface of Mars [#1870] MOC images reveal the presence of a surface material that exhibits viscous flow features. Stress-strain rate relationships show that an ice-dust mixture is a plausible composition for this observed flow material.

Arfstrom J. D.* Proposed Martian Glaciers of Recent Age and a Model of Their Formation [#1092] Similarities between proposed glaciers and active terrestrial alpine glaciers suggest that recent or active glaciers may exist in Dao Vallis, Mars. A model is presented to explain how the proposed glaciers could form on Mars under recent conditions.

33rd LPSC Program------131 Friday, March 15, 2002 DUST DEVILS, DUNES, AND CRATERS 8:30 a.m. Salon C

Chairs: S. H. Williams H. E. Newsom

Sullivan R. J. * Threshold-of-Motion Wind Friction Speeds at the Mars Pathfinder Landing Site [#2022] Threshold-of-motion wind friction speeds are calculated for the Pathfinder site, using IMP windsock results and shear-stress partitioning. Stronger winds than previous estimates must have occurred in the past to explain observed aeolian features.

Balme M.* Greeley R. Mickelson B. Iversen J. Beardmore G. Branson D. Metzger S. Dust Devils on Mars: Results from Threshold Tests Using a Vortex Generator [#1048] Dust devils have been observed on the Martian surface and are thought to play an important role in the dust cycle. We present results from threshold experiments using a vortex generator to investigate dust-lifting mechanisms of dust devils.

Rossi A. P.* Possible Dust Devils Tracks Detected in Tenere' Desert (Niger): An Analogue to Mars [#1307] Dust devils tracks-like features have been found in Western Tenere' desert on ASTER imagery. These tracks are visible in a wide area, on different surfaces (sand sheets and dunes). The scale is comparable to martian ones.

Williams S. H.* Zimbelman J. R. Ward A. W. Large Ripples on Earth and Mars [#1508] Aeolian ripples on Earth with wavelengths >50 em have distinctive attributes, that should be helpful in interpreting ripple-like features on Mars.

Zimbelman J. R.* WilsonS. Ripples and Dunes in the Syrtis Major Region of Mars, as Revealed in MOC Images [#1514] Six categories of ripple-like aeolian bedforms have been identified in MOC images, and their physical attributes are compared to large ripples on Earth.

Fenton L. K. * Richardson M. I. Toigo A. D. Sand Transport in Proctor Crater on Mars Based on Dune Morphology and Mesoscale Modeling [#1953] The goal of this work is to determine the recent sedimentary and climate history of Proctor Crater. The dunes are formed in a bidirectional wind regime that matches the modeled circulation patterns of the current climate.

Bourke M. C.* Bullard J. E. Aeolian-Fluvial Interaction Along Arnus Vallis, Syrtis Major [#1755] The aeolian sediment transport in Syrtis Major is complex and dynamic. Composed of a series of linked sediment stores, deposit assemblages (incl. aeolian ridges, topographic lee dunes, climbing dunes, wind streaks) form an active sediment transport continuum.

Garvin J. B.* Sakimoto S. E. H. Frawley J. J. Schnetzler C. Global Geometric Properties of Martian Impact Craters [#1255] We present impact crater geometric properties for >5000 fresh martian features using high resolution Mars Orbiter Laser Altimeter digital elevation models and topographic profiles. We discuss global results and significant regional variations.

132 ------33rd LPSC Program Schultz P. H.* Uncovering Mars [#1790] Removal of thick sedimentary sequences on Mars can dramatically alter surface ages inferred from crater statistics. Hesperian surfaces can appear to be Amazonian and Amazonian can appear to be newly emplaced.

Wilbur K. E.* Schultz P. H. The Effect of the Coriolis Force on Distal Ejecta Deposits on Mars [#1728] Ballistic trajectories, adjusted to include the Corio lis force, reveal the effect of rotation on the deposition of distal ejecta on Mars, showing enhanced deposition at high latitudes.

Barlow N. G.* Pollak A. Comparisons of Ejecta Mobility Ratios in the Northern and Southern Hemisphere;s of Mars [#1322] We have extended our measurements of ejecta mobility for layered ejecta morphology craters in the southern hemisphere of Mars. We report on the preliminary results and how these results compare with those for craters in the northern hemisphere.

Segura T. L.* Toon O. B. Colaprete A. Zahnle K. Effects of Large Impacts on Mars: Implications for River Formation [#1900] The Martian crater record provides ample evidence of the impacts of large(> 100 krn) objects. These objects create hot global debris layers meters or more in depth, cause long term warming, and are capable of melting and precipitating a significant amount of water globally.

Newsom H. E.* Hagerty J. J. Shearer C. W. Mobile Element Reservoir Mass Balance on Mars: New SIMS and EMP Data from Lonar and Mistastin Craters [#1577] New SIMS data for mobile elements in Lonar Crater clay minerals are remarkably similar to data for alteration material in the Lafayette Mars meteorite. This work strongly supports the use of terrestrial analogues for Mars, including a new mass balance model for mobile elements through time.

33rd LPSC Program------133 Friday, March 15, 2002 CARBONATE AND MAGNETITE IN ALH 84001 8:30 a.m. Marina Plaza Ballroom

Chairs: A. M. Koziol C. M. Corrigan

Treiman A. H.* Amundsen H. E. F. Blake D. F. Bunch T. Hydrothermal Origin for Carbonate Globules in ALH84001 by Analogy with Similar Carbonates from Spitsbergen (Norway) [#1552] Basalts and xenoliths from Spitsbergen (Norway) contain carbonate globules nearly identical to those in ALH84001. The Spitsbergen globules formed from hydrothermal waters- by analogy, so did those in ALH84001.

Corrigan C. M. * Harvey R. P. Unique Carbonates in Martian Meteorite Allan Hills 84001 [#1051] Unique carbonates in ALH84001 have offered additional insight into the history of the rock.

Wadhwa M.* SuttonS. R. Flynn G. J. Newville M. Microdistributions of Rb and Sr in ALH84001 Carbonates: Chronological Implications for Secondary Alteration on Mars [#1362] Concentrations of Rb and Sr were analyzed on the micron-scale in various compositional zones of the ALH84001 carbonates. Implications of the measured Rb/Sr ratios for the chronology of these carbonates are discussed.

Niles P. B.* Leshin L.A. Guan Y. Hervig R. L. Carbon Isotopic Composition of ALH8400I Carbonates: An Ion Microprobe Study [#1655] We present measurements of the carbon isotopic composition of ALH84001 carbonates. We have found variations of-20%o that increase as crystallization proceeded.

Goreva J. S.* Guan Y. Leshin L. A Isotopic Composition of Carbon in Martian Magmatic Minerals: Insights into Martian Carbon Reservoirs [#2014] Ion microprobe carbon isotopic analyses show martian meteorite phosphates have 8 13 C values of- -15%o, heavier than previous estimates of martian magmatic carbon based on bulk analysis, but still lighter than the terrestrial mantle value.

Flynn G. J.* SuttonS. R. Keller L. P. X-Ray Microprobe Measurements of the Chemical Compositions. ofALH84001 Carbonate Globules [#1648] We measured minor element contents of carbonate from ALH84001 and report trends in tbe Ca, V, Mn and Sr in carbonate and the associated magnetite bands.

McKay D. S.* Clemett S. J. Gibson E. K. Jr. Thomas-Keprta K. Wentworth S. J. Are Carbonate Globules, Magnetites, and PAHs in ALH84001 Really Terrestrial Contaminants? [#1943] Possible biosignatures in martian meteorites are evaluated to see if they can be explained by terrestrial contamination. PARs, carbonate globules, and nano-size magnetites in ALH84001 are very unlikely to be terrestrial contamination.

IhingerP. D.* Chamberlin S. SmithS. Inorganic Terrestrial Analog for Carbonate-Magnetite-Pyrite Assemblage in ALH-84001 [#2057] An inorganic terrestrial analog for the controversial carbonate globules from ALH-84001 is described.

134 ------33rd LPSC Program Thomas-Keprta K. L.* Clemett S. J. Romanek C. S. Bazylinski D. A Kirschvink J. L. McKay D. S. Wentworth S. J. Vali H. Gibson E. K. Multiple Origins of Magnetite Crystals in ALH8400I Carbonates [#1911] No single process, either inorganic or biogenic, can explain all the magnetites in ALH84001 carbonates. We propose that their origins can best be explained as a product of multiple processes, one of which is Martian biogenic intracellularly produced magnetite.

Golden D. C. Ming D. W. * Lauer H. V. Jr. Schwandt C. S. Morris R. V. Lofgren G. E. McKay G. A Inorganic Formation of "Truncated Hexa-Octahedral" Magnetite: Implications for Inorganic Processes in Martian Meteorite ALH8400I [#1839] We report the first inorganic laboratory synthesis of a unique crystal morphology for magnetite that corresponds to magnetite produced by magnetotactic bacterial strain MV -1 and reported for some magnetite crystals in Martian meteorite ALH84001.

Koziol A.M.* Brearley A J. A Non-Biological Origin for the Nanophase Magnetite Grains in ALH8400I: Experimental Results [#1672] We subjected siderite-magnesite carbonates to a short-lived thermal pulse. Individual magnetite grains that formed are 10 to 20 nm in size and randomly oriented. Shape and size distribution of these grains appear similar to those seen in ALH8400 1.

Weyland M.* Midgley P. A Dunin-Borkowski R. E. Frankel R. B. Buseck P.R. . Advanced TEM Techniques for Assessing the Possible Biogenic Origin of Meteoritic Magnetite Crystals [#1592] TEM methods that allow the 3D morphology and chemistry of magnetite crystals to be characterized to 1 nm resolution are described. This information is required to assess evidence for the former presence of extraterrestrial life in meteorite ALH84001.

Kirschvink J. L. * Kim S. Weiss B. P. Shannon D. M. Kobayashi A K. Rock Magnetic and Ferromagnetic Resonance Tests of Biogenic Magnetite in ALH8400I [#1991] Three separate rockmagnetic and ferromagnetic resonance tests support the hypothesis that between 25 and 50% of the fine-grained magnetite in the Martian meteorite ALH84001 was formed via biological processes.

33rd LPSC Program------135 .. PRINT-ONLY PRESENTATIONS

Meteorites

Alexeev V. A. Gorin V. D. Ustinova G. K. Meteorite Evidence on Galactic Cosmic Ray Gradients at the 22nd Solar Cycle Minimum [#1016] Radionuclides Mn-54 and Na-22 in five chondrites fallen in 1996-2000 are used to estimate the galactic cosmic ray gradients in the heliosphere over the minimum of the 22nd solar cycle.

Bischoff A. Discovery of Purple-Blue Ringwoodite Within Shock Veins of an LL6 Ordinary Chondrite from Northwest Africa [#1264] The purple-blue, mainly in L6 chondrites occurring high-pressure polymorph of olivine is known since many years and named ringwoodite. The Saharan LL6 ordinary chondrite contains this phase. This is the first discovery of ringwoodite in an LL-chondrite.

Bland P. A. Cressey G. Alard O. Rogers N. W. Forder S.D. Gounelle M. Modal Mineralogy of Carbonaceous Chondrites, and Chemical Variation in Chondrite Matrix [#1754] We use XRD and Mtissbauer spectroscopy to determine the modal mineralogy of Allende, Murchison, Tagish Lake, and Orgueil, for minerals of abundance >0.5 wt%. In addition, we employ LA-ICPMS to constrain trace element variation in chondrite matrix.

Bondar Yu. V. Kashkarov L. L. Perelygin V. P. Tracks and Dislocations in Silicate Minerals of the Omolon Pallasite [#1067] The Omolon meteorite is an unusual pallasite having essential portion of the olivine crystals with specific dislocations, which is practically not observed in other pallasites.

Calafiore S. I. Implications of Olivine-Spinel Geothermometry for the Thermal Metamorphism of LL Chondrites [#1815] Calibrations of the olivine-spinel geothermometer were applied to analyses of LL chondrites of different petrologic type and the results were compared to the findings of studies of LL chondrites using pyroxene thermometry.

Chikami J. Mineralogical Study of EET96077 and EET96309 Enstatite Chondrites [#1083] I have compared the chemical composition of metal grains between EET96077 EH3 and EET96309 EH4-5 and found that Ni and Si contents of metal in EET96077 are higher than EET96309.

Gunter M. E. Dyar M.D. Delaney J. S. SuttonS. R. Lanzarotti A. Effects of Preferred Orientation on Microscale XANES Measurements of Fe3+/2:Fe in Biopyriboles [#1654] For a series of 12 biopyribole samples, we assess the effects of crystallographic orientation on the pre-peak energies 3 and the Fe +/~ Fe101a1 ratios derived from them.

Ikeda Y. Takeda H. Kimura M. Suzuki A. A New Shergottite from Oman, Dhofar 378 [#1434] The Dhofar 378 meteorite is a basaltic shergottite, which was recently recovered from the Oman desert. The stone is one of the most ferroan shergottite and represents a late-stage fractional crystallization product of a Martian magma.

136 ------33rd LPSC Program Kashkarov L. L. Ivliev A. I. Kalinina G. V. Lavrentyeva z. A. Lyul A. Yu. Shock Induced Local Features in the Norton County Obrite by the Data ofTrack, Thermoluminescence and Petrology-Chemical Analysis [#1181] Track and TL studies on the radiation-thermal history of the meteoritic and lunar material have focused on the significant effect of the local shock-thermal events. It was observed presence in different meteorites and lunar samples with the modified track and TL parameters.

Lazar C. Walker D. Experimental Partitioning ofTc, Mo, Ru, andRe in Fe-Ni-S at 60 kbar [#1402] Tc behaves like Ru, notRe, in Fe-Ni-S crystallization and is much more siderophile than pressure-dependent Mo at any pressure. Isotopic anomalies are more likely in Mo than Ru from asteroid core crystallization before Tc extinction.

LinC-Y. ZhangF-S. WangH-N. WangR-C. ZhangW-L. Antarctic GRV9927: A New Member of SNC Meteorites [#1562] The GRV9927 meteorite was collected during the 16th Antarctic expedition in 1999. Based on observations, it appears that this meteorite can be recognized as an SNC.

Lorenz C. A. Kurat G. Brandstaetter F. NWA 776: A Howardite with an Anomalously High Abundance of Carbonaceous Chondrite Xenoliths [#1570] The NW A 776 howardite has high abundance of carbonaceous chondrite clasts. They are similar to carbonaceous chondrites and collected interplanetary dust. The NW A 776 collected chondrite dust during its formation in the source region.

Mamaev I. A. Milder O. B. Grokhovsky V.I. Oshtrakh M. I. Mossbauer Effect Study of the Weathering and Corrosion Products of Sikhote-Alin and Chinga Meteorites [#1608] The study of various products of weathering and corrosion of iron containing meteorites are very interesting in order . to understand the processes of meteorite metamorphism in terrestrial conditions.

Perelygin V. P. Bondar Yu. V. Brandt R. Fleischer R. L. Kashkarov L. L. Kravets L. I. Rebetez M. Spohr R. Vater P. O'Sullivan D. Search for Relatively Stable Super Heavy Elements in Nature by Fossil Track Studies of Crystals from Meteorites and Moon Surface [#1066] The main goal of the present work is the search and identification of relatively stable nuclei of super heavy elements in galactic matter by fossil track study of nonconducting crystals excluding from the near-surface position of some meteorites and lunar regolith material.

Povenmire K. I. Povenmire H. Three Well Documented Georgia Tektites from Montgomery, Wheeler and Twiggs Counties, Georgia [#1027] This article documents new Georgia tektite finds which are helping to expand the known boundaries of the Georgia tektite strewn field.

Sahijpal S. Stable and Radiogenic Isotopic Constraints on the Role of Core-Collapse Supernova as a Source of Short-lived Nuclides [#1095] Attempt has been made in the present work to impose stable as well as radiogenic isotopic constraints to decipher the role of type II supernova in producing short-lived nuclides found in the early solar system.

Tomita N. Nakamura A.M. Measurements of Bidirectional Reflectance of Ordinary Chondrites [#1100] We measured the bidirectional reflectance of two ordinary chondrite samples (Tuxtuac and NW A593) by changing both incident and emergent angles. We compare our data with the previous laboratory results and the data of the asteroids, and discuss on a comparison between them and S and Q-asteroids.

33rd LPSC Program------137 Moon

Chuburkov Yu. T. Element Composition of Moon and Some Solar System Bodies in the Light of Their Chemical Properties [#1030] Relative chemical-element compositions of Mars, Shergotty meteorite, and Moon are close and differ from those of the Earth, chondrites, and iron meteorites.

DeAngelis G. Wilson J. W. Clowdsley M.S. Nealy J. E. Humes D. H. Clem J. M. A Radiation Safety Analysis for Lunar Lava Tubes [#1417] The purpose of this work is an assessment of the lunar lava tubes physical characteristics and an evaluation of the their actual safety features from the point of view of the ionizing radiation environment as potential habitats for future lunar exploration crews.

Kaydash V. Shkuratov Yu. Kreslavsky M. Omelchenko V. Lunar Opposition Spike at Two Wavelengths from Clementine Data [#1235] A few images of the lunar surface containing opposition spike pattern were taken during Clementine mission. We present a new method to study the opposition spike. This method confirms existing of the spectral dependence of the opposition spike.

Kreslavsky M.A. Shkuratov Yu. G. Photometric Anomalies of the Lunar Swface: New Results from Clementine Data Analysis [#1161] We study spatial variations of the photometric properties. We found small areas of anomalous photometry caused by local anomalies of mm-scale regolith structure. Such anomalies are related to some fresh impact craters, a landing site, and a swirl.

Kuskov O. L. Kronrod V. A. Hood L. L. Geochemical Constraints on the Seismic Properties of the Lunar Mantle [#1501] The results of a systematic study of geochemically permissible velocities and densities in the lunar mantle internally consistent with the equilibrium phase assemblage and the mass and moment of inertia requirements are reported.

Makarenko G. F. Ultimate Reality: The Earth Without Mobilism, the Moon Without Impacts [#1467] Lunar and Earthen tectonic megaforms have identical positions on their planets.

McCallum I. S. Schwartz J. M. Camara F. Norman M. Sample 672 I 5: An Anomalous Ferroan Anorthosite [#1830] Sample 67215c is a ferroan anorthosite clast with an age of 4.4 Ga and a positive ENd· The sample has a well preserved microcumulate texture. Relatively rapid cooling rates coupled with preserved pigeonite are consistent with a shallow (< 1 km) origin.

Papike J. J. Karner J. M. Shearer C. K. Spilde M. N. Spinel from Apollo 12 Olivine Mare Basalts: Chemical Systematics of Selected Major, Minor, and Trace Elements [#1238] Spinels from Apollo 12 Olivine basalts have been studied by Electron and Ion microprobe techniques. The zoning trends of major, minor and trace elements provide new insights into the conditions under which planetary basalts form.

Petrov D. V. Shkuratov Yu. G. Stankevich D. G. Areas of Lunar Cold Traps Permanently Shaded Once and Twice [#1232] Searching for areas with a store of ice is a very important problem from the point of view of future lunar bases. We estimate areas shaded permanently using a hierarchical double-scale model of the lunar topography.

138 33RD LPSC Program Shkuratov Yu. G. Kreslavsky M.A. Litvinenko L. N. Negoda A. A. A Prospective Ukrainian Lunar Orbiter Mission: Objectives and Scientific Payload [#1234] We consider objectives of Ukrainian lunar polar orbiter and its possible scientific payload. We propose three instruments for the spacecraft: (1) a synthetic aperture imaging radar, (2) ground-penetrating radar, and (3) imaging polarimeter.

Velikodsky Yu. I. Akimov L.A. Korokhin V. V. The Latitude Dependence of Brightness of the Lunar SuJface [#1860] It was obtained values of parameter of empirical Akimov's formula for different types of the lunar surface. Spectral dependence of this p~rameter was studied.

Zeigler R. A. Haskin L.A. Jolliff B. L. Wang A. Korotev R. L. Formation of Siderite in Lunar Regolith Particles During Irradiation for Instrumental Neutron Activation Analysis [#1976] Last year we reported on siderite in an Apollo 16 regolith particle. We ascribed this to vapor deposition on the surface of the Moon by cometary or meteorite impact. Subsequent experiments have shown the siderite to be terrestrial contamination.

Mars

Bell J. F. III Farrand W. H. Johnson J. R. Morris R. V. Low Abundance Materials at the Mars Pathfinder Landing Site: An Investigation Using Spectral Mixture Analysis and Related Techniques [#1775] We report new evidence for small, localized deposits of spectrally anomalous materials at the Mars Pathfinder landing site.

Caplinger M. A. . Mars Orbiter Camera Global Mosaic [#1405] A global mosaic of MOC images at 256 pixels/degree resolution has been completed. The techniques used in its construction and its expected accuracy are described.

Cucinotta F. Badhwar G. Zeitlin C. Cleghorn T. Bahr J. Beyer T. Chambellan C. Delaune P. Dunn R. Flanders J. Riman F. Exploration of the Mars Radiation Environment Using MARIE [#1679] One of three science instruments onboard Mars Odyssey is the Mars Radiation Environment Experiment (MARIE) which is described here. MARIE is an energetic particle spectrometer which will characterize the space radiation environment of Mars and determine its risk to human exploration. de Pablo M. A. Druet M. Description, Origin and Evolution of a Basin in Sirenum Terrae, Mars, Including Atlantis Chaos: A Preliminary Study [#1032] Atlantis Chaos is located in a basin of Sirenum Terrae that could have been a lake in the past history of Mars. Moreover, this work discusses the origin and the evolution of this basin in terms of description and geologic mapping.

Druet M. de Pablo M. A. Morphological Cartography of the Ares Vallis Head Cut, Mars [#1118] A morphological cartography of the head cut of one of the biggest circum Chryse outflow channels on Mars, Ares Vallis, is presented in this abstract, and it is the first step for next detailed studies on this area.

Elwood Madden M. E. Bodnar R. J. Geochemical Modeling of Basalt-Brine Interactions as an Analog for Mars Near-Suiface Processes [#1211] Geochemical modeling of NaCl and MgS04 brine-basalt interactions used as analogs for possible liquid water-rock interactions near the surface of Mars. Resulting aqueous liquids may be stable under Mars surface conditions.

33rd LPSC Program------139 Fairen A. G. de Pablo M. A. An Evolutionary Timescale for the Water on Mars [#1013] A timescale for the water on Mars can be proposed. This would include a first Late Noachian step, portrayed by the Martian boundary. A secondary, Early Hesperian ocean would have extended into the lowlands. Finally, a number of lakes would have worked when Mars came through another thermal cycle.

Ganti T. Horvath A. Berczi Sz. Gesztesi A. Szathmary E. Defrosting and Melting, Not Defrosting Alone [#1221] Four basic observations on Martian dark dune spots: a) DDSs are restricted to dark dunes, b) circularity, c) DDS elongation on slopes, d) emanations/seepage on steeper slopes. To explain them a melting process from below is to be added to defrosting.

Goetz W. Kinch K. M. Harrit N. Jaehger M. Zych E. Madsen M. B. Knudsen J. M Ultraviolet Flux Dosimetry on the Swface of Mars [#1216] We outline the scientific potential of ultraviolet (UV) flux measurements on the surface of Mars and we describe a simple device for measuring the UV flux. Test experiments with a prototype device are presented and briefly discussed.

McEmoe S. A. Dyar M.D. Brown L. B. Magnetic Signatures on Planets Without Magnetic Fields [#1287] On extraterrestrial bodies with no present day magnetic fields, the majority of the magnetic signature must come from high coercivity phases such as hemo-ilmenite, ilmenohematite, or very fine-grained magnetite.

Neakrase L. D. V. Greeley R. Mars Polar Wind Streaks as Sublimation-aided Wind Indicators [#1378] MOC images were used to measure polar wind streaks on Southern Polar Layered Deposits. Comparisons were made to GCM predictions for different times in order to determine formation history for streaks and accuracy of GCM for polar wind patterns during transition from spring to summer.

Presley M. A. What Can Thermal Inertia Do for You? [#1144] Thermal Inertia vs. Particle Size presentation for an atmospheric pressure of 5 torr.

Sprenke K. F. Baker L. L. Magnetization of Arsia Mons, Mars [#1070] A slight magnetic anomaly over Arsia Mons suggests that its lavas have a magnetic intensity similar to that of terrestrial sea-floor basalts (about 1 Aim). This magnetization was possibly induced by a local field associated with remanent magnetization in the much older adjacent crust.

Vuong D. Badhwar G. Cleghorn T. Wilson T. L. Anomalous Cosmic-Ray Candidates in MARIE Measurements [#1652] Cosmic-ray measurements have been made by the Mars Radiation Environment Experiment (MARIE) onboard 2001 Mars Odyssey. A preliminary analysis of the near-Earth data for the elements Hand He at energies 20-284 MeV indicates the possible presence of anomalous cosmic rays (ACRs).

Venus Geology

Burba G. A. Blue J. Campbell D. B. Dollfus A. Gaddis L. Jurgens R. F. Marov M. Ya. Pettengill G. H. Stofan E. R. Venus Nomenclature 200I: Introduction of the New Names, Changes to the Earlier Approved Names, and Improvements at the Website [#1927] Fifty-four new names introduced for features on Venus. Parga Chasmata (term in plural) name is used for the broad zone of canyons. Prominent features within it obtained individual names. Web Gazetteer provides now name search along 9 parameters.

140 ------33rd LPSC Program Doggett T. C. Grosfils E. B. Stratigraphy and Stress History Recorded by a Complex Volcano-Tectonic Feature in the Nemesis Tessera Quadrangle, Venus [#1004] The stress history of a feature, identified as a previously uncataloged dike swarm, at 45N 191E is mapped as clockwise rotation of maximum horizontal compressive stress. It is intermediate between areas associated with compression, mantle upwelling and convection.

Craters

Badjukov D. D. Raitala J. Ohmann T. Lorenz C. The Kara Crater Size: Suevite Layer Outside the Crater Depression [#1480] Impactites at the Syadmayakha River located 55 km northeast from the Kara crater center are proposed to be the fallback suevite. This leads to an assumption that the area belongs to a crater floor and the Kara crater is at least 110 km in diameter.

Kozlov E. A Zhugin Y. N. Sazonova L. V. Fel'dman V.I. Migration of Chemical Components of Minerals Under Shock-Wave Loading of Janisjarvi Astrobleme Target Rocks (Kareliya, Russia) [#1050] The results of spherical shock-wave recovery experiments are presented. The regularities of atoms migrating and occupying different crystallographic positions in the grid of minerals in stress waves of different intensity have been revealed.

Lehtinen M. Pesonen L. J. Stehlik H. Kuulusa M. The Suvasvesi South Structure, Central Finland: New Evidences for Impact [#1188] Recently found shatter cones on the shore of lake Suvasvesi South, central Finland, together with petrographic and geophysical data support the idea that it, together with its northern companion (Suvasvesi North), forms a new doublet impact site.

Nayak V. K. A Meteorite Impact Crater and Astroblemes in India [#1129] The details of a meteorite impact crater at Lonar and astroblemes at Ramgarh and Shiva in the Indian subcontinent are furnished and their signficant features highlighted.

Shandera S. E. Lorenz R. D. Experiments on Low Speed Penetration into Granular Materials of Varying Size, Shape and Density [#1403] Impact accelerometry from impacts into granular materials yields information on target particle size etc.

Valter A A Dobraynskii Yu. P. The Cooling History of Layered Glassy Impactites (Tagamites): Influence Upon Preservation of Impact Diamonds [#1116] The cooling down dynamics was calculated for the rock mass of essentially glassy tagamites from the Boltysh Astrobleme on the Ukrainian Shield and for the body of diamond-bearing tagamites of the Popigai Astrobleme in the north of West Siberia.

Vishnevsky S. A Palchik N. A . Carbon Matter in Impactites of the Yanis-Jiirvi Astrobleme, Russia: High Pressure Shock Transformations [#1676] Carbon matter in impactites of Yanis-Jarvi astrobleme exhibits high pressure shock transformations (origin of cubic diamond paramorphs on parental graphite, and development of fine cubic diamond crystallites on amorphous parental carbon). ·

33rd LPSC Program------141 Astrobiology

Giber K. Cultivation of Iron Bacteria on the Mars [#1377] It is not impossible that anaerobic iron-bacteria life community can live on Mars- with a minimal technical support. Through my experiment we could study the life conditions of the Martian surface and create the first terrestrial life forms on Mars.

Mazzini A Li R. Parnell J. Spectroscopic Methods for Analyzing Organic Compounds in Fluid Inclusions During Planetary Exploration [#1645] Raman Spectroscopy and Time of Flight-Secondary Ion Mass Spectrometry both provide data on organic compounds in fluid inclusions, and could help in the search for biosignatures in surface precipitates on Mars.

Parnell J. Requirements to Obtain Biomolecular Signature of Life from Fluid Inclusions on Mars [#1615] The water in fluid inclusions in minerals precipitated on Mars contains a record of the ambient environment during mineral precipitation. The fluid chemistry could include a biomolecular signature of any life in the environment.

Pun A Papike J. J. Shearer C. K. Trace-Element Analyses of Carbonate Minerals in the Gunflint Banded Iron Formation [#1357] We report on the petrography, mineralogy and trace-element abundances of individual carbonate grains in the Early Proterozoic Gunflint BIF. Trace-element data may be used as environmental recorders of the fluid evolution from which the various carbonate phases precipitated.

Sharpton V. L. Impact and the Evolution of Martian Permafrost Environments [#1908] Impact cratering enhances the capacity of massive volcanic sequences·, such as those observed on Mars; to hold water and enhance the potential for the development and evolution of life in six important ways.

Spilde M. N. Boston P. J. Scheible R. T. Papike J. J. Mineral Precipitation by Mn-oxidizing Microbes: Comparing Natural and Cultured Mn-Minerals [#1090] We have cultured Mn-oxidizing microorganisms from New Mexico caves using Mn-emiched media. No crystalline material was observed at 1 month. By 3 months, poorly-crystalline buserite was present, and by 8 months, peaks for buserite, birnessite and vernadite were observed.

Svetsov V. V. Assessment of Organics Delivery by Comets to the Early Earth [#1451] An approximate calculation of the amount of organic material delivered to the Earth by comets during the first 700 Myr has been carried out. The numerical model includes deceleration, fragmentation and ablation during comet flight in a primordial atmosphere.

Comets, Asteroids, and Meteorites

Golubeva L. F. Shestopalov D. I. Concerning Pyroxene-Olivine Ratio on S-Asteroid Surfaces [#1003] It is shown that variations of BAND I and BAND liB AND II area ratio in the S-asteroid spectra are caused by the variations of relative mineral contents, Opx/Cpx and 01/Px to be exact.

Miyamoto M. Mikouchi T. Diffuse Reflectance Spectra for Heated Samples of the Millbillillie Eucrite: Comparison with 4 Vesta [#1468] We measured the diffuse reflectance spectra of powder samples and heated samples of the Millbillillie eucrite to study spectral changes by heating and compared the results with the spectra of Vesta.

142 ------33rd LPSC Program .. Povenmire H. R. The Great Valdosta, Georgia Fireball of Aprili2, I979 [#1022] This abstract details the fall of an extremely bright fireball over the Florida-Georgia border in 1979.

Shingareva T.V. Behavior. of Smooth Material on ?hobos and Deimos [#1834] A comparison of surfaces of two Martian satellites was made. It is concluded that smooth material layer on Phobos is similar to that one on Deimos.

Interplanetary Dust

Carrez Ph. Demyk K. Leroux H. Cordier P.

Low Temperature Crystallisation of MgSi03 Glass Under Ionizing Irradiation [#1459] We performed ionizing irradiation on MgSi03 glass at low temperature. Our observations indicate that the material crystallizes into forsterite. This process may contribute to the presence of crystalline silicates in circumstellar environments.

Cuillierier R. Duprat J. Maurette M. Hammer C. The Crucial Role of Neon to Identify Cometary Micrometeorites from Historical and Future Leonids Showers Trapped in Antarctica and Greenland Snows [#1519] We point out a possible "Ne fingerprint" to identify, in the 1966 "Leonids" snow layer in central Greenland and Antarctica, micrometeorites coming from recent release of comet Temple-Tuttle. Consequences for the EMMA scenario are discussed.

Planetary Formation and Early Evolution

Barbieri M. Marzari F. Scholl H. Vanzani V. Planetary Formation, Resonances, and Star Mass Accretion in the Alpha Centauri System [#1189] We have simulated the last stage of planetary formation in the Alpha Cen binary system. We derive sizes of terrestrial planets that can grow in the system and the amount of mass that falls onto the stars. We also find a case of a 2:1 resonance between the planets.

Makalkin A. B. Accretion of Solid Particles by Gravitating Planetesimals in the Solar Nebula and Jovian Subnebula: Implications for Depletion ofthe Terrestrial Planets and Galilean Satellites in Volatiles [#1888] Accretion of solid particles by planetesimals in the gas-rich nebula and subnebula is estimated as a function of particle size. It is shown that this process can yield depletion of the terrestrial planets (but hardly the Galilean satellites) in moderately and highly volatile elements.

Outer Solar System

Campbell D. B. Black G. J. Carter L. M. Hine A. A. Margot J. L. Nolan M. C. Ostro S. J. The Surface of Titan: Arecibo Radar Observations [#1941] The Arecibo 12.6 em radar system was used to observe Titan in 1999, 2000 and 2001. The mean value ofthe radar albedo is 0.16 and the polarization ratio is 0.35. For some longitudes the echo has a specular component although most of the echo power is contained in a diffuse component.

Kuznetzova J. G. Musaev F. A. Bondar A. V. Sergeev A. V. Vid'machenko A. P. The Results of Extensive Object and Titan Observations First Obtained with Aid of the Coude Echelle Spectrometer Fed by the 2-M Telescope at the Terscol Observatory (Nothern Caucasus) [#1201] In this report the original results of extensive object observations such as planet-giants (Jupiter and Saturn) and Saturn's satellite Titan and the results of spectrum processing are presented. Data were obtained with aid of the coude echelle spectrometer.

33rd LPSC Program------143 Ruiz J. Tejero R. Heat Flow from an Europa's Convective Ice Layer Tidally Heated [#1035] Convection in the ice shell is only compatible with high heat flows, implies by Europa thin brittle lithosphere, if dominant tidal heating is in the convective interior nearly isotherm, and if the ice viscosity is dominated by superplastic flow.

Sever K. M. Greeley R. Lenticulae of Europa: Geomorphic and Geographic Study [#1581] Using Galileo images with resolutions of 250m/pix or better, four categories of lenticulae have been identified. These categories were mapped to determine any pattern in placement leading to specific modes of formation.

Shapkin A. I. Sidorov Yu. I. Antsyshkin D. V. Physicochemical and Orbital Correlations in Satellite Systems [#1497] The Solar system origin theories should explain satellite systems origin, consistent with that of the planetary system. In some attitude, satellite systems examination provides even more reliable information.

Origins: Stardust to Phyllosilicates

Drobyshevski E. M. New Population of the Solar System- Dark Electric Matter Objects: Its Influence on the Planetary Structure and Evolution [#1119] Discovery of Dark Electric Matter Objects, precipitating from the Earth-crossing orbits, favors a build-up in the Earth of a daemon kernel of -20 Tt mass and ::;I min size. Its nuclear activity explains origin of the excessive -10 TW heat flux, fluxes of 3He, 4He, etc.

Krushevskaya V. N. Vid'machenko A. P. The Features of Spatial Distribution of Stars with Planets [#1206] Up today over 70 extrasolar giant planets were discovered around 65 main sequence stars. Spatial distribution of such stars are shown in this paper.

Lukacs B. Berczi Sz. Kereszturi A. Brown Dwaif's Atmospheres: Possible Analogy for Condensation in the Solar Nebula [#1472] We show a model approximation to the brown darf stellar atmospheric lower layers which probably are cool enough to sink into the Lewis-Barshay region of the Solar System condensation, where minerals can precipitate from the gas cloud.

Marakushev A. A. Chaplygin O. V. Origin of the Earth and Moon [#1185] The Moon is one of the oldest bodies in the solar system. The nearest analog of the Moon according to the size and density is Jupiter's satellite Io. In spite of the enormous age difference, Io and the Moon are similar not only in size and density, but also in relation to the parental planet.

Ustinova G. K. On Time Intervals of Formation of the Primordial Matter [#1015] The analysis of the short-lived extinct radionuclides in meteorites leads to the conclusion that the last exploded supernova before the formation of the solar system was, apparently, a carbon-detonation supernova, in which the r-process was absent.

Vid'machenko A. P. Krushevskaya V. N. Reflectivity Variation of Extrasolar Planets [#1214] We have estimated relative contribution of light flux from extrasolar giant planets for all known 65 stars. For 5 19 stars flux variations of EGPs have amplitudes equal to some times of 10- - 10-4 of I* and can be registered by photometers with photon counting.

144 33rd LPSC Program Ward Wm. R. Agnor C. B. Canup R. M. Obliquity Variations in Planetary Systems [#2017] The stability of spin axis motions and the consequent planetary obliquities for a given planetary system is examined via a simple algorithm for spin axis oscillations of a test particle as a functions of its spin rate and orbital distance.

Future Missions

Jones D. L. Weinreb S. Preston R. A. Spacecraft Tracking with Large Radio Arrays [#1241] We propose a large array of many identical, small radio telescopes as an affordable way to increase the sensitivity of the DSN by up to two orders of magnitude. This would allow much greater data returns from future missions, as well as new types of missions.

Mardon A. A. Greenspon J. A. Kolotenko I. R. Robotic Tunnelling of the Moons of Mars for Manned Missions to Mars [#1572] This paper discusses an option for the rapid development of a permanent Mars operational base in Mars orbit.

Education

Simon T. Sik A. Astrobiology- The New Synthesis [#1629] We are summarizing the fundamental results of last years in astronomy, planetary sciences, molecular biology (extremophiles) and evolution biology. Based on this complex knowledge we will try to start the first astrobiological course of the country.

33rd LPSC Program------145

PROGRAM INDEX

* Designates speaker

AbeM. Between Rock/Cold Place Posters, Tim, p.m., Gym Aoki K. Between Rock/Cold Place Posters, Tbu, p.m., Gym AbeY. Planetary Formation Posters, Tue, p.m., Gym Arai T. Lunar Impacts Posters, Tue, p.m., Gym AbeY. Mars Oceans Posters, Tbu, p.m., Gym Archinal B. A. Mars Data Posters, Tue, p.m., Gym Abell P. A.* Small Bodies, Tbu, p.m., Salon A Archinal B. A. Mars Landers Posters, Tue, p.m., Gym AbelmanL. Future Missions Posters, Tbu, p.m., Gym Arends H. Future Missions Posters, Thu, p.m., Gym Abe-Ouchi A. Mars Oceans Posters, Tbu, p.m., Gym Arfstrom J. D. Mars Oceans Posters, Thu, p.m., Gym AbreuN. M.* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Arfstrom J. D* Mars Flowing Ice, Fri, a.m., Salon B Abshire J. B. Mars Remote Sensing, Wed, p.m., Marina Plaza Arkani-Hamed J. * Mars History, Thu, a.m., Salon C Accomazzi A. Future Missions Posters, Tbu, p.m., Gym Arnold J. R. Odyssey Results, Tue, p.m., Salon B Acton C. H. Jr. Mars Future Missions Posters, Tbu, p.m., Gym Arnott H. J. Astrobiology, Wed, p.m., Salon B AcufiaM.H. Lunar Geophysics Posters, Tue, p.m., Gym Arroyo B. lylars Future Missions Posters, Tbu, p.m., Gym AcufiaM.H. Lunar Regolith, Tue, p.m., Salon A Artemieva N. A.* Cratering Processes, Tue, a.m., Salon C AcufiaM.H. Mars Magnetics/Mercury, Wed, p.m., Salon A Arvidson R. E. Mars Volcanism, Mon, a.m., Salon B Adams P. M. Mars Infrared Spectroscopy, Tue, a.m., Salon B Arvidson R. E* Mars Geology, Mon, p.m., Salon B AdlerM. Mars Landers Posters, Tue, p.m., Gym Arvidson R. E. Odyssey Results, Tue, p.m., Salon B Agee C. B. Planetary Formation, Tue, p.m., Salon C Arvidson R. E. Mars Data Posters, Tue, p.m., Gym Agee C. B. Planetary Formation Posters, Tue, p.m., Gym Arvidson R. E. Mars Landers Posters, Tue, p.m., Gym Agnor C. B. Print Only: Origins Arvidson R. E. Education Posters, Tue, p.m., Gym Aharonson O. Mars History, Tbu, a.m., Salon C Arvidson R. E. Mars Future Missions Posters, Tbu, p.m., Gym Ahrens T. J. Cratering Processes, Tue, a.m., Salon C ASC-Techsat 21 Team Future Missions Posters, Thu, p.m., Gym Ahrens T. J. lOPs/Micrometeorites Posters, Tue, p.m., Gym AshR.D.*. Refractory Inclusions, Thu, p.m., Marina Plaza Airieau S. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Asiyo C. Organic Material Posters, Tue, p.m., Gym AittolaM. Mars Geology Posters, Tue, p.m., Gym Asphaug E. Planetary Formation, Tue, p.m., Salon C AittolaM. Cratered Earth Posters, Tue, p.m., Gym Asphaug E.* Small Bodies, Tbu, p.m., Salon A AittolaM. Mars Craters Posters, Tbu, p.m., Gym AurnouJ. M. Mars History, Tbu, a.m., Salon C Akimov L. A. Print Only: Moon AurnouJ. M. Three Icy Moons Posters, Thu, p.m., Gym AlardO. Print Only: Meteorites _Aust S. Odyssey Results, Tue, p.m., Salon B Albari:de F. Planetary Formation, Tue, p.m., Salon C Austin D. E. lOPs/Micrometeorites Posters, Tue, p.m., Gym Albin E. F. Mars Geology Posters, Tue, p.m., Gym Bada J. L. Organic Material Posters, Tue, p.m., Gym Albin E. F. Mars Volcanism Posters, Tue, p.m., Gym Bada J. L. Astrobiology Posters, Thu, p.m., Gym AlenaR. Mars Data Posters, Tue, p.m., Gym BadhwarG. Odyssey Results, Tue, p.m., Salon B AleonJ.* lOPs/Micrometeorites, Mon, p.m., Marina Plaza BadhwarG. Print Only: Mars AleonJ* Refractory Inclusions, Tbu, p.m., Marina Plaza BadjukovD. Cratered Earth Posters, Tue, p.m., Gym Alexander C. M. O'D. lOPs/Micrometeorites, Mon, p.m., Marina Plaza Badjukov D. D. Print Only: Craters Alexander C. M. O'D* Chondrules/Solar System, Tue, a.m., Marina Plaza Bahr J. Print Only: Mars Alexander C. M. O'D. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Bailey C. L. lOPs/Micrometeorites Posters, Tue, p.m., Gym Alexander C. M. O'D. Carbonaceous Chondrites Posters, Tue, p.m., Gym Baines K. Ice Rocks Posters, Thu, p.m., Gym Alexander C. M. O'D. Presolar Grains II, Wed, p.m., Marina Plaza Baker L. L. Three Icy Moons Posters, Thu, p.m., Gym Alexander C. M. O'D. Isotopes Posters, Tbu, p.m., Gym Baker L. L. Print Only: Mars' Alexandrov A. Martia.n Surface Posters, Tue, p.m., Gym BakerY. Future Missions Posters, Thu, p.m., Gym Alexeev V. A. Print Only: Meteorites Baker V. R. Mars Tectonics, Wed, a.m., Salon C Allen C. C* Astrobiology, Wed, p.m., Salon B BakerY. R* Mars History, Tbu, a.m., Salon C Allen C. C. Mars Future Missions Posters, Tbu, p.m., Gym BalmeM.* Dust Devils, Fri, a.m., Salon C AllenJ. Education Posters, Tue, p.m., Gym Baloga S.M.* Mars Volcanism, Mon, a.m., Salon B Allie M.S. Iron Meteorites Posters, Tue, p.m., Gym Balogh Zs. Future Missions Posters, Thu, p.m., Gym AlltonJ. H. Mars Future Missions Posters, Tbu, p.m., Gym Bamblevski V. Mars Remote Sensing Posters, Tbu, p.m., Gym AmariS* Presolar Grains I, Wed, a.m., Marina Plaza Bandfield J. L. Mars Infrared Spectroscopy, Tue, a.m., Salon B AmariS. Presolar Grains II, Wed, p.m., Marina Plaza Bandfield J. L* Odyssey Results, Tue, p.m., Salon B Amelin Y* Early Solar System, Mon, a.m., Marina Plaza Bandfield J. L. Mars Remote Sensing Posters, Tbu, p.m., Gym AmelinY. Chondrites Posters, Tue, p.m., Gym Banerdt W. B. Mars History, Tbu, a.m., Salon C Ametrano S. J. Melted Meteorites, Tbu, a.m., Marina Plaza Banerjee D. Martian Surface Posters, Tue, p.m., Gym AmilsR. Astrobiology, Wed, p.m., Salon B Banerjee D. Mars Data Posters, Tue, p.m., Gym Amundsen H. E. F. ALH 84001, Fri, a.m., Marina Plaza Barber C. A. Mars Landers Posters, Tue, p.m., Gym AnandM. Lunar Impacts Posters, Tue, p.m., Gym Barbieri M. Cratered Earth Posters, Tue, p.m., Gym AnandM. Martian Meteorites, Tbu, p.m., Salon C Barbieri M. Print Only: Planetary Formation Anderson F. S Odyssey Results, Tue, p.m., Salon B Barbieri R. Astrobiology Posters, Thu, p.m., Gym Anderson F. S. Mars Landers Posters, Tue, p.m., Gym Bare C. Mars Volcanism Posters, Tue, p.m., Gym Anderson F. S. Mars Flowing Ice, Fri, a.m., Salon B Barlow M. J. Origins, Fri, a.m., Salon A Anderson J. A. Future Missions Posters, Tbu, p.m., Gym BarlowN. G* Dust Devils, Fri, a.m., Salon C Anderson J. L. B.* Cratering Processes, Tue, a.m., Salon C Barnard L. Io Burns, Tbu, p.m., Salon B Anderson R. C.* Mars Volcanism, Mon, a.m., Salon B Barnett D. Mars Tectonics, Wed, a.m., Salon C Anderson R. C. Mars Data Posters, Tue, p.m., Gym Barnouin-Jha O. Borrelly and Eros, Wed, p.m., Salon C Anderson R. C. Mars Tectonics, Wed, a.m., Salon C Barnouin-Jha O. Martian Gullies, Thu, a.m., Salon B Anderson R. C. Mars Tectonics Posters, Tbu, p.m., Gym Barnouin-Jha O. Mars Future Missions Posters, Tbu, p.m., Gym Anderson S. Mars Landers Posters, Tue, p.m., Gym Barnouin-Jha O. S.* Cratering Processes, Tue, a.m., Salon C Anderson S. W. Venus/Mercury Posters, Tue, p.m., Gym BaronJ. E. Mars Data Posters, Tue, p.m., Gym Andrade J. Io Burns, Tbu, p.m., Salon B Barr A. C.* Europa's Icy Shell, Thu, a.m., Salon A AnfimovD. Odyssey Results, Tue, p.m., Salon B Barraclough B. L. Future Missions Posters, Thu, p.m., Gym AnfimovD. Mars Remote Sensing Posters, Tbu, p.m., Gym Barrat J. A. Martian Meteorites Posters, Thu, p.m., Gym AngelS. M. Mars Future Missions Posters, Tbu, p.m., Gym Barros S. Io Burns, Tbu, p.m., Salon B Anguita J. Planetary Formation Posters, Tue, p.m., Gym Barth W. Future Missions Posters, Thu, p.m., Gym Ansan V. Mars Geology Posters, Tue, p.m., Gym Bartlett P. W. Future Missions Posters, Thu, p.m., Gym Anti:menko I.* Lunar Basalts, Wed, a.m., Salon A Basilevsky A. T. * Venus Geology/Geophysics, Tue, a.m., Salon A Antsyshkin D. V. Print Only: Outer Solar System Basilevsky A. T. Three Icy Moons Posters, Thu, p.m., Gym

33rd LPSC Program Index ______l47 Bass D. Mars Polar Terrain Posters, Thu, p.m., Gym Black G. J.* Mars Magnetics/Mercury, Wed, p.m., Salon A Bastos A. Io Burns, Thu, p.m., Salon B Blair A. Venus/Mercury Posters, Tue, p.m., Gym Basu A.* Lunar Regolith, Tue, p.m., Salon A BlairM. Martian Surface Posters, Tue, p.m., Gym Basu A. Lunar Basalts Posters, Thu, p.m., Gym BlairM. Mars Data Posters, Tue, p.m., Gym Batt C. A. Mars Future Missions Posters, Thu, p.m., Gym Blake D. F. ALH 84001, Fri, a.m., Marina Plaza Baumgardner J. R. Early Moon, Mon, a.m., Salon A BlakeR. E. Astrobiology Posters, Thu, p.m., Gym BaurH. Chondrites Posters, Tue, p.m., Gym Bland P. A. Chondrites Posters, Tue, p.m., Gym Baur H. Lunar Regolith Posters, Tue, p.m., Gym Bland P. A. Print Only: Meteorites Baur H. Isotopes Posters, Thu, p.m., Gym Blaney D. L* Martian Poles, Wed, a.m., Salon B Bazylinski D. A. ALH 84001, Fri, a.m., Marina Plaza Blaney D. L. Io Burns, Thu, p.m., Salon B Beard B. L.* Martian Meteorites, Thu, p.m., Salon C Blank J. G.* Astrobiology, Wed, p.m., Salon B Beardmore G. Dust Devils, Fri, a.m., Salon C Bleamaster L. F. III* Venus Geology/Geophysics, Tue, a.m., Salon A Beauchamp B. Astrobiology, Wed, p.m., Salon B Bleamaster L. F. III Venus/Mercury Posters, Tue, p.m., Gym Beauchamp J. L. IDPs/Micrometeorites Posters, Tue, p.m., Gym Blewett D. T. Lunar Remote Sensing Posters, Tue, p.m., Gym Becker H.* Early Solar System, Mon, a.m., Marina Plaza Blewett D. T. Lunar Basalts, Wed, a.m., Salon A BeckerT. L. Borrelly and Eros, Wed, p.m., Salon C Blewett D. T. Lunar Basalts Posters, Thu, p.m., Gym Beckett J. CA!s, AOAs, Dis Posters, Thu, p.m., Gym Blichert-Toft J. Planetary Formation, Tue, p.m., Salon C Beckett J. R* Ordinary Chondrites, Mon, p.m., Salon C Blue J. Print Only: Venus Beiersdorfer R. E. Education Posters, Tue, p.m., Gym BlumJ. D. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Beisser K. Mars Future Missions Posters, 'Thu, p.m., Gym Blundell S. Mars Infrared Spectroscopy, Tue, a.m., Salon B BelianR. D. Lunar Regolith Posters, Tue, p.m., Gym Bobrovnitskii Yu. Odyssey Results, Tue, p.m., Salon B Bell J. F. III Mars Infrared Spectroscopy, Tue, a.m., Salon B BoctorN. Z. Carbonaceous Chondrites Posters, Tue, p.m., Gym Bell J. F. III Mars Remote Sensing, Wed, p.m., Marina Plaza BodnarR. J. Martian Meteorites, Thu, p.m., Salon C Bell J. F. III Print Only: Mars Bodnar R. J. Print Only: Mars BellM. Education Posters, Tue, p.m., Gym Boesenberg J. S. Carbonaceous Chondrites, Tue, p.m., Marina Plaza BellM.S* Cratered Earth, Mon, a.m., Salon C Bogard D. D. Early Moon, Mon, a.m., Salon A Bellucci G. Ice Rocks Posters, Thu, p.m., Gym Bogard D. D. Chronology Posters, Tue, p.m., Gym Belshaw N. C. Refractory Inclusions, 'Thu, p.m., Marina Plaza Bogatikov O. A. Planetary Formation Posters, Tue, p.m., Gym Bender K. Odyssey Results, Tue, p.m., Salon B Bogdanovski 0* Early Solar System, Mon, a.m., Marina Plaza Benedix G. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Boggs D. H. Lunar Geophysics Posters, Tue, p.m., Gym Benedix G. K. * Melted Meteorites, Thu, a.m., Marina Plaza BohnM. Martian Meteorites Posters, Thu, p.m., Gym Benner L. A. M. Small Bodies, Thu, p.m., Salon A Boice D. C.* Borrelly and Eros, Wed, p.m., Salon C Benner L. A. M. Surprising Things Posters, Thu, p.m., Gym BoldtJ. Mars Future Missions Posters, Thu, p.m., Gym Bennett G. Borrelly and Eros, Wed, p.m., Salon C Bomba J. Mars Future Missions Posters, Thu, p.m., Gym Bennett V. C. Lunar Impacts Posters, Tue, p.m., Gym Bombardieri D. J. Lunar Basalts Posters, Thu, p.m., Gym BenoitP. H. Borrelly and Eros, Wed, p.m., Salon C BandT. Venus/Mercury Posters, Tue, p.m., Gym BenoitP. H. Surprising Things Posters, Thu, p.m., Gym Bondar A. V. Print Only: Outer Solar System Benoit P. H. Future Missions Posters, Thu, p.m., Gym Bondar Yu. V. Print Only: Meteorites Berczi Sz. Education Posters, Tue, p.m., Gym Bondarenko N. V. Venus/Mercury Posters, Tue, p.m., Gym Berczi Sz. Mars Polar Terrain Posters, Thu, p.m., Gym BonettD. M. Education Posters, Tue, p.m., Gym Berczi Sz. Future Missions Posters, Thu, p.m., Gym Bordas F. Future Missions Posters, ')lm, p.m., Gym Berczi Sz. Print Only: Mars Borg L. E.* Early Moon, Mon, a.m., Salon A Berczi Sz. Print Only: Origins Borg L. E. Martian Meteorites Posters, Thu, p.m., Gym Bergeron M. A. Surprising Things Posters, Thu, p.m., Gym Boss A. P. Origins, Fri, a.m., Salon A Berkley J. L. Melted Meteorites, Thu, a.m., Marina Plaza Boston P. J. Print Only: Astrobiology Bernatowicz T. J Chronology Posters, Toe, p.m., Gym Botta O. Organic Material Posters, Tue, p.m., Gym Bernatowicz T. J. Presolar Grains II, Wed, p.m., Marina Plaza Botta O. Astrobiology Posters, Thu, p.m., Gym Berry F. J. Chondrites Posters, Toe, p.m., Gym Bougher S. Odyssey Results, Tue, p.m., Salon B Bertka C. M. Martian Surface Posters, Tue, p.m., Gym BourkeM. C* Dust Devils, Fri, a.m., Salon C BesmehnA.* Presolar Grains I, Wed, a.m., Marina Plaza Bourot-Denise M. Chondrules/Solar System, Tue, a.m., Marina Plaza Beyer R. A. Mars Landers Posters, Toe, p.m., Gym Bourot-Denise M. Carbonaceous Chondrites Posters, Tue, p.m., Gym Beyer T. Print Only: Mars Bciurot-Denise M. Chondrites Posters, Tue, p.m., Gym Bhangoo J. S. Borrelly and Eros, Wed, p.m., Salon C Bowman C. D. Education Posters, Tue, p.m., Gym Bibring J-P. Mars Future Missions Posters, Thu, p.m., Gym BowmanJ. D. Mars Landers Posters, Tue, p.m., Gym Bibring J-P. Ice Rocks Posters, Thu, p.m., Gym Boynton W. V. Odyssey Results, Tue, p.m., Salon B Biccari D. Mars Landers Posters, Toe, p.m., Gym Boynton W. V. Martian Surface Posters, Tue, p.m., Gym BicoJ. Cratered Earth, Mon, a.m., Salon C Boynton W. V. Borrelly and Eros, Wed, p.m., Salon C Biener K. K. Mars Geology Posters, Tue, p.m., Gym Boynton W. V. Achondrites Posters, Thu, p.m., Gym Biener K. K. Mars Aeolian Posters, Thu, p.m., Gym Boynton W. V. Mars Remote Sensing Posters, Thu, p.m., Gym Bierhaus E. B. Three Icy Moons Posters, Thu, p.m., Gym Bradley J. P* IDPs/Micrometeorites, Mon, p.m., Marina Plaza Billings S. E. Three Icy Moons Posters, Thu, p.m., Gym Bradley J. P. Planetary Formation, Tue, p.m., Salon C BillsB.G* Mars Magnetics/Mercury, Wed, p.m., Salon A Brandon A. D. Martian Meteorites, Thu, p.m., Salon C Binder A. Lunar Geophysics Posters, Tue, p.m., Gym Brandstiitter F. Carbonaceous Chondrites Posters, Tue, p.m., Gym Binder A. B. Lunar Regolith, Tue, p.m., Salon A Brandstatter F. Melted Meteorites, Thu, a.m., Marina Plaza Binder A. B. Lunar Regolith Posters, Tue, p.m., Gym. BrandsUitter F. Print Only: Meteorites Binder A. B. Lunar Basalts, Wed, a.m., Salon A BrandtR. Print Only: Meteorites Binet L. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Brannon J. C. Early Solar System, Mon, a.m., Marina Plaza Binzel R. P. Small Bodies, Thu, p.m., Salon A Brannon J. C. Chronology Posters, Tne, p.m., Gym Bischoff A. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Branscomb J. Borrelly and Eros, Wed, p.m., Salon C Bischoff A. Chondrites Posters, Tue, p.m., Gym Branson D. Dust Devils, Fri, a.m., Salon C Bischoff A. Print Only: Meteorites Brasier M. D.* Astrobiology, Wed, p.m., Salon B Bish D. L.* Mars Remote Sensing, Wed, p.m., Marina Plaza Brearley A. J * Carbonaceous Chondrites, Tue, p.m., Marina Plaza Bishop J. Mars Data Posters, Tue, p.m., Gym Brearley A. J. Carbonaceous Chondrites Posters, Tue, p.m., Gym Bishop J. Mars Future Missions Posters, Thu, p.m., Gym Brearley A. J. ALH 84001, Fri, a.m., Marina Plaza Bishop J. L. Mars Infrared Spectroscopy, Tue. a.m., Salon B Bremmer R. R. Future Missions Posters, Thu, p.m., Gym Bishop J. L. Martian Surface Posters, Tue, p.m., Gym Breneman H. H. Io Burns, Thu, p.m., Salon B Bishop J. L* Mars Remote Sensing, Wed, p.m., Marina Plaza Brenker F. E. Chondrules/Solar System, Tue, a.m., Marina Plaza Blacic J.D. Martian Surface Posters, Tue, p.m., Gym Brennetot R. Martian Surface Posters, Tue, p.m., Gym Blacic J.D. Mars Future Missions Posters, Thu, p.m., Gym Brennetot R. Mars Future Missions Posters, Thu, p.m., Gym Black G. J. Print Only: Outer Solar System BrianA. W. Venus/Mercury Posters, Tue, p.m., Gym

148 33rd LPSC Program Index Bridges J. C. Ordinary· Chondrites, Mon, p.m., Salon C Camara F. Achondrites Posters, Thu, p.m., Gym Bridges J. C. Martian Meteorites Posters, Thu, p.m., Gym Camara F. Print Only: Moon Bridges N. Mars Landers Posters, Tue, p.m., Gym Cameron A. G. W.* Origins, Fri, a.m., Salon A Bridges N. T. Venus/Mercury Posters, Tue, p.m., Gym Cameron D.P. Jr. Astrobiology Posters, Thu, p.m., Gym Bridges N. T. Mars Aeolian Posters, Thu, p.m., Gym Campbell A. J. Chondrules/Solar System, Tue, a.m., Marina Plaza Briggs G. A. Mars Landers Posters, Tue, p.m., Gym Campbell A. J* Carbonaceous Chondrites, Tue, p.m., Marina Plaza BrigmonR. Astrobiology, Wed, p.m., Salon B Campbell B. A. Mars Future Missions Posters, Thu, p.m., Gym Brinckerhoff W. B. Future Missions Posters, Thu, p.m., Gym Campbell D. B. Mars Magnetics/Mercury, Wed, p.m., Salon A BrittO. T* Borrelly and Eros, Wed, p.m., Salon C Campbell D. B. Small Bodies, Thu, p.m., Salon A Britt D. T. Small Bodies, Thu, p.m., Salon A Campbell D.B. Surprising Things Posters, Thu, p.m., Gym Brooks F. D. Iron Meteorites Posters, Tue, p.m., Gym Campbell D. B. Print Only: Venus BrownL. B. Print Only: Mars Campbell D. B. Print Only: Outer Solar System BrownR. H. Borrelly and Eros, Wed, p.m., Salon C Canup R. M* Planetary Formation, Tue, p.m., Salon C BrownR. H. Ice Rocks Posters, Thu, p.m., Gym CanupR. M. Print Only: Origins BrownR. H. Three Icy Moons Posters, Thu, p.m., Gym Capaccioni F. Ice Rocks Posters, Thu, p.m., Gym Brownlee D. E.* lOPs/Micrometeorites, Mon, p.m., Marina Plaza Caplinger M. A. Print Only: Mars Brownlee D. E. lOPs/Micrometeorites Posters, Tue, p.m., Gym Capo R. C. Future Missions Posters, Thu, p.m., Gym Bruce T. S. Cratered Earth Posters, Tue, p.m., Gym Caprarelli G. Planetary Formation Posters, Tue, p.m., Gym Bruckner J. Odyssey Results, Tue, p.m., Salon B Cardell G. Future Missions Posters, Thu, p.m., Gym Bruckner J. Borrelly and Eros, Wed, p.m., Salon C Carey J. W. Mars Remote Sensing, Wed, p.m., Marina Plaza Bruckner J. Mars Remote Sensing Posters, Thu, p.m., Gym Carey R. Carbonaceous Chondrites Posters, Tue, p.m., Gym Brunet F. Mars Geophysics Posters, Thu, p.m., Gym CarlsonR. W. Io Burns, Thu, p.m., Salon B Brunetti B. Lunar Regolith Posters, Tue, p.m., Gym Carlson R. W. lo Posters, Thu, p.m., Gym Buchanan P. C. Chondrites Posters, Tue, p.m., Gym Carlson W. D. Melted Meteorites, Thu, a.m., Marina Plaza Buczkowski D. L* Mars Geology, Mon, p.m., Salon B CarrM. Mars Landers Posters, Tue, p.m., Gym Buehler M. G. Mars Future Missions Posters, Thu, p.m., Gym CarrM. H. Mars History, Thu, a.m., Salon C Buffler A. Iron Meteorites Posters, Tue, p.m., Gym Carrez Ph. Print Only: lOPs Buhler C. R. Martian Surface Posters, Tue, p.m., Gym Carter L M. Print Only: Outer Solar System Buhler C. R. Mars Future Missions Posters, Thu, p.m., Gym Cassen P. Planetary Formation, Tue, p.m., Salon C Bullard J. E. Dust Devils, Fri, a.m., Salon C Castano R. Mars Data Posters, Tue, p.m., Gym Bulmer M. H* Martian Gullies, Thu, a.m., Salon B Castano R. Future Missions Posters, Thu, p.m., Gym Bulmer M. R. Planetary Formation Posters, Tue, p.m., Gym Castilla G. Planetary Formation Posters, Tue, p.m., Gym Bunch T. ALH 84001, Fri, a.m., Marina Plaza Castillol Clash of Titans Posters, Thu, p.m., Gym Buratti B. J. Borrelly and Eros, Wed, p.m., Salon C Castillo P. Cratered Earth, Mon, a.m., Salon C Buratti B. J. Ice Rocks Posters, Thu, p.m., Gym Catchings R. D. Cratered Earth Posters, Tue, p.m., Gym Burba G. A. Print Only: Venus Cavalazzi B. Astrobiology Posters, Thu, p.m., Gym Burbine T. H. Borrelly and Eros, Wed, p.m., Salon C Cech V. Future Missions Posters, Thu, p.m., Gym Burbine T. H. Small Bodies, Thu, p.m., Salon A Cerroni P. Ice Rocks Posters, Thu, p.m., Gym Burbine T. H. Achondrites Posters, Thu, p.m., Gym CetinerZ. Chondrules/Solar System, Tue, a.m., Marina Plaza. Burbine T. H. Between Rock/Cold Place Posters, Thu, p.m., Gym Chabot N. L. * Planetary Formation, Tue, p.m., Salon C Burgess R. Lunar Basalts Posters, Thu, p.m., Gym ChabotN. L. Iron Meteorites Posters, Tue, p.m., Gym Burgisser A. Mars Volcanism Posters, Tue, p.m., Gym Chafetz H. S. Astrobiology Posters, Thu, p.m., Gym Burnett D. S. Future Missions Posters, Thu, p.m., Gym Chambellan C. Print Only: Mars · BurrO. M.* Mars Flowing Ice, Fri, a.m., Salon B Chamberlain M. Ice Rocks Posters, Thu, p.m., Gym Burt D. M.* Martian Gullies, Thu, a.m., Salon B Chamberlin S. ALH 84001, Fri, a.m., Marina Plaza Burt D. M. Mars Remote Sensing Posters, Thu, p.m., Gym Chambers J _E.* Lunar Cratering, Mon, p.m., Salon A BusS. J. Small Bodies, Thu, p.m., Salon A Chambers J. E* Planetary Formation, Tue, p.m., Salon C Buseck P. R. Carbonaceous Chondrites Posters, Tue, p.m., Gym Chambers J. E. Martian Poles, Wed, a.m., Salon B Buseck P. R. ALH 84001, Fri, a.m., Marina Plaza Chaplygin O. V. Print Only: Origins BusemannH. Melted Meteorites, Thu, a.m., Marina Plaza Chapman C. R* Lunar Cratering, Mon, p.m., Salon A BusemannH. Martian Meteorites, Thu, p.m., Salon C Chapman C. R. Three Icy Moons Posters, Thu, p.m., Gym Busemann H. Martian Meteorites Posters, Thu, p.m., Gym ChapmanM. G.* Mars Geology, Mon, p.m., Salon B BusemannH. Isotopes Posters, Thu, p.m., Gym Chapman M. G. Mars Tectonics, Wed, a.m., Salon C BushJ. W. M. Cratered Earth, Mon, a.m., Salon C Chapman M. G. Martian Gullies, Thu, a.m., Salon B Bussey D. B. J. * Lunar Regolith, Tue, p.m., Salon A Chappelow J. E. Mars Aeolian Posters, Thu, p.m., Gym Bussey D. B. J. Lunar Remote Sensing Posters, Tue, p.m., Gym ChaterR. J. Future Missions Posters, Thu, p.m., Gym Bussey D. B. J. Lunar Basalts Posters, Thu, p.m., Gym Chaussidon M. * Early Solar System, Mon, a.m., Marina Plaza Bussey D. B. J. Between Rock/Cold Place Posters, Thu, p.m., Gym Chaussidon M. lOPs/Micrometeorites, Mon, p.m., Marina Plaza BussoM. Presolar Grains I, Wed, a.m., Marina Plaza Chaussidon M. Lunar Regolith, Tue, p.m., Salon A Butler B. Future Missions Posters, Thu, p.m., Gym Chellapilla S. Origins, Fri, a.m., Salon A Butman S. Mars Future Missions Posters, Thu, p.m., Gym ChenJ. H* Lunar Cratering, Mon, p.m., Salon A Butterworth A. L. Future Missions Posters, Thu, p.m., Gym ChenJ. H. Ordinary Chondrites, Mon, p.m., Salon C Byrne C. J. Lunar Remote Sensing Posters, Tue, p.m., Gym ChenM. Cratered Earth, Mon, a.m., Salon C ByrneM. Astrobiology, Wed, p.m., Salon B ChenM. Ordinary Chondrites, Mon, p.m., Salon C Byrnes J. M* Venus Geology/Geophysics, Tue, a.m., Salon A ChenetH* Early Moon, Mon, a.m., Salon A Cabral N. A. Mars Landers Posters, Tue, p.m., Gym Cheng A. F* Borrelly and Eros, Wed, p.m., Salon C CabrolN. A* Martian Gullies, Thu, a.m., Salon B Cheng A. F. Future Missions Posters, Thu, p.m., Gym Cabral N. A. Mars Oceans Posters, Thu, p.m., Gym Chevrel S. Mars Future Missions Posters, Thu, p.m., Gym CaffeeM. W. Chondrites Posters, Tue, p.m., Gym Chevrier V. Chondrites Posters, Tue, p.m., Gym CaffeeM. W. Achondrites Posters, Thu, p.m., Gym Chevrier V. Mars Geophysics Posters, Thu, p.m., Gym Cahill J. P. Lunar Regolith Posters, Tue, p.m., Gym Chicarro A. F. Mars Future Missions Posters, Thu, p.m., Gym Cahill J. P. Lunar Impacts Posters, Tue, p.m., Gym Chicarro A. F. Astrobiology Posters, Thu, p.m., Gym Cahill J. T. Lunar Impacts Posters, Tue, p.m., Gym Chien S. Future Missions Posters, Thu, p.m., Gym Cahill J. T* Martian Meteorites, Thu, p.m., Salon C Chikami J. Print Only: Meteorites Cai Z. Presolar Grains II, Wed, p.m., Marina Plaza Chipera S. J. Mars Remote Sensing, Wed, p.m., Marina Plaza Calafiore S. I. Print Only: Meteorites Chizmadia L. J. Carbonaceous Chondrites Posters, Tue, p.m., Gym Calle C. I. Martian Surface Posters, Tue, p.m., Gym ChobletG. Three Icy Moons Posters, Thu, p.m., Gym Calle C. I. Mars Future Missions Posters, Thu, p.m., Gym Choo T. Mars Future Missions Posters, Thu, p.m., Gym CalvinW.M. Martian Surface Posters, Tue, p.m., Gym Christensen P. R. Mars Geology, Mon, p.m., Salon B CalvinW.M* Mars Remote Sensing, Wed, p.m., Marina Plaza Christensen P. R. Mars Infrared Spectroscopy, Tue, a.m., Salon B

33rd LPSC Program Index 149 Christensen P. R. Odyssey Results, Tue, p.m., Salon B Craddock R. A. Mars Flowing Ice, Fri, a.m., Salon B Christensen P. R. Martian Surface Posters, Tue, p.m., Gym Crary F. Borrelly and Eros, Wed, p.m., Salon C Christensen P. R. Education Posters, Tue, p.m., Gym Crawford D. A. Cratering Processes, Tue, a.m., Salon C Chuburkov Yu. T. Print Only: Moon Cremers D. Future Missions Posters, Thu, p.m., Gym Chutjian A. Astrobiology Posters, Thu, p.m., Gym Cremers D. A. Martian Surface Posters, Tue, p.m., Gym Ciesla F. J. * Origins, Fri, a.m., Salon A Cremers D. A. Mars Future Missions Posters, Thu, p.m., Gym Cintala M. J. Cratering Processes, Tue, a.m., Salon C Cressey G. Chondrites Posters, Tue, p.m., Gym Cintala M. J. Borrelly and Eros, Wed, p.m., Salon C Cressey G. Print Only: Meteorites Clancy R. T. Mars Future Missions Posters, Thu, p.m., Gym Crisp J. Mars Landers Posters, Tue, p.m., Gym Clark B. Mars Future Missions Posters, Thu, p.m., Gym Crisp J. A. Mars Volcanism, Mon, a.m., Salon B Clark C. S. Between Rock/Cold Place Posters, Thu, p.m., Gym Criswell D. Borrelly and Eros, Wed, p.m., Salon C Clarki. D. Martian Surface Posters, Tue, p.m., Gym Croat K.* Presolar Grains II, Wed, p.m., Marina Plaza Clark P. E. Lunar Regolith Posters, Tue, p.m., Gym Croat T. K. Presolar Grains II, Wed, p.m., Marina Plaza Clark P. E. Borrelly and Eros, Wed, p.m., Salon C Croskell M. S. Cratering Processes Posters, Tue, p.m., Gym Clark P. E. Future Missions Posters, Thu, p.m., Gym Crown D. A. Mars Volcanism, Mon, a.m., Salon B Clark R. Ice Rocks Posters, Thu, p.m., Gym Crown D. A.* Mars Geology, Mon, p.m., Salon B Clayton D. D* Presolar Grains I, Wed, a.m., Marina Plaza Crown D. A. Venus Geology/Geophysics, Tue, a.m., Salon A Clayton D. D. Origins, Fri, a.m., Salon A Crown D. A. Mars Geology Posters, Tue, p.m., Gym Clayton R. N. Carbonaceous Chondrites Posters, Tue, p.m., Gym Crown D. A. Education Posters, Tue, p.m., Gym ClaytonR. N. Martian Surface Posters, Tue, p.m., Gym Crown D. A. Mars Oceans Posters, Thu, p.m., Gym Clayton R.N. Presolar Grains I, Wed, a.m., Marina Plaza Crown D. A. Future Missions Posters, Thu, p.m., Gym Clayton R.N. Presolar Grains II, Wed, p.m., Marina Plaza Crozaz G. Ordinary Chondrites, Mon, p.m.. Salon C Clayton R. N* Origins, Fri, a.m., Salon A Cruikshank D. Ice Rocks Posters, Thu, p.m., Gym Cleghorn T. F. Odyssey Results, Tue, p.m., Salon B Crumpler L. S. Mars Volcanism Posters, Tue, p.m., Gym Cleghorn T. F. Print Only: Mars Crumpler L. S. Mars Landers Posters, Tue, p.m., Gym Clem J. M. Print Only: Moon Cucinotta F. A. Odyssey Results, Tue, p.m., Salon B Clemett S. J* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Cucinotta F. A. Print Only: Mars Clemett S. J. Astrobiology, Wed, p.m., Salon B Cudnik B. M. Cratering Processes Posters, Tue, p.m., Gym Clemett S. J. ALH 84001, Fri, a.m., Marina Plaza Cuillierier R. Print Only: IDPs Clifford S. M. Mars Flowing Ice, Fri, a.m., Salon B CurtisS. Future Missions Posters, Thu, p.m., Gym Cloutier P. A. Mars Magnetics/Mercury, Wed, p.m., Salon A Czlapinski J. Surprising Things Posters, Thu, p.m., Gym Clowdsley M. S. Print Only: Moon Dahl-Jensen D. Europa's Icy Shell, Thu, a.m., Salon A Coates A. J. Mars Landers Posters, Tue, p.m., Gym DaiZ. R. IDPs/Micrometeorites, Mon, p.m., Marina Plaza Cochrane C. G * Venus Geology/Geophysics, Tue, a.m., Salon A Dalton J. B. Clash of Titans Posters, Thu, p.m., Gym Cody G. D* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Dalton J. B. Ill* Europa's Icy Shell, Thu, a.m., Salon A Coffield J. E. Cratering Processes Posters, Tue, p.m., Gym Danyushevsky L. V. Lunar Basalts Posters, Thu, p.m., Gym Cohen B. A.* Lunar Cratering, Mon, p.m., Salon A Darlington E. H. Mars Future Missions Posters, Thu, p.m., Gym Cohen B. A. Chondrules/Solar System, Tue, a.m., Marina Plaza Daulton T. L. * Presolar Grains II, Wed, p.m., Marina Plaza Cohen B. A. Lunar Impacts Posters, Tue, p.m., Gym Dauphas N.* Early Solar System, Mon, a.m., Marina Plaza Cohen B. A. Surprising Things Posters, Thu, p.m., Gym Davies A. G* Io Burns, Thu, p.m., Salon B Cohen B. A. Origins, Fri, a.m., Salon A Davies A. G. Mars Craters Posters, Thu, p.m., Gym Colaprete A. Dust Devils, Fri, a.m., Salon C Davies A. G. Future Missions Posters, Thu, p.m., Gym Coleman N. M. * Mars Flowing Ice, Fri, a.m., Salon B Davies J. K. Surprising Things Posters, Thu, p.m., Gym Collins G. C.* lo Burns, Thu; p.m., Salon B DaviesM. E. Mars Data Posters, Tue, p.m., Gym Collins G. C. Three Icy Moons Posters, Thu, p.m., Gym Davis A.M.* Venus Geology/Geophysics, Tue, a.m., Salon A Collins G. S. Cratering Processes Posters, Tue, p.m., Gym Davis A.M.* Presolar Grains I, Wed, a.m., Marina Plaza Colvin T. R. Mars Data Posters, Tue, p.m., Gym Davis A.M. Presolar Grains II, Wed, p.m., Marina Plaza Colwell J. E. Surprising Things Posters, Thu, p.m., Gym Davis A.M. Refractory Inclusions, Thu, p.m., Marina Plaza Colwell J. E.* Origins, Fri, a.m., Salon A DeS. Martian Surface Posters, Tue, p.m. Gym CombeJ-P. Mars Aeolian Posters: Thu, p.m., Gym DeAngelis G. Print Only: Moon Connerney J. E. P. Mars Magnetics/Mercury, Wed, p.m., Salon A De HonR. A. Mars Oceans Posters, Thu, p.m., Gym Connolly H. C. Jr. Ordinary Chondrites, Mon, p.m., Salon C de Koter A. Origins, Fri, a.m., Salon A Connolly H. C. Jr. Chondrules/Solar System, Tue, a.m.; Marina Plaza De Maria G. Lunar Regolith Posters, Tue, p.m., Gym Consolmagno G. J. Chondrites Posters, Tue, p.m., Gym de Pablo M. A. Planetary Formation Posters, Tue, p.m., Gym Consolmagno G. J. * Small Bodies, Thu, p.m., Salon A de Pablo M. A. · Print Only: Mars Cook A. C. Lunar Remote Sensing Posters, Tue, p.m., Gym DeSantis A. Cratered Earth Posters, Tue, p.m., Gym Cook A. C. Venus/Mercury Posters, Tue, p.m., Gym Deak F. Education Posters, Tue, p.m., Gym Cook A. C. Cratering Processes Posters, Tue, p.m., Gym Deal K. Mars Geology, Mon, p.m., Salon B Cook A. C. Mars Tectonics, Wed, a.m., Salon C Deardorff D. G. Mars Landers Posters, Tue, p.m., Gym Cook D. Mars Data Posters, Tue, p.m., Gym Deffontaines B. Cratered Earth Posters, Tue, p.m., Gym Cook D. A. Future Missions Posters, Thu, p.m., Gym Degenhardt J. Mars Oceans Posters, Thu, p.m., Gym CoomberS. Astrobiology Posters, Thu, p.m., Gym Delamere W. A. Mars Data Posters, Tue, p.m., Gym Cooper C. D* Mars Infrared Spectroscopy, Tue, a.m., Salon B Delamere W. A. Mars Future Missions Posters, Thu, p.m., Gym Cooper C. D. Mars Remote Sensing Posters, Thu, p.m., Gym Delaney J. IDPs/Micrometeorites, Mon, p.m., Marina Plaza Cooper G. Organic Material Posters, Tue, p.m., Gym Delaney J. S. Cratered Earth, Mon, a.m., Salon C Copeland P. Cratering Processes Posters, Tue, p.m., Gym Delaney J. S. Chondrules/Solar System, Tue, a.m., Marina Plaza Coppin P. Education Posters, Tue, p.m., Gym Delaney J. S* Martian Meteorites, Thu, p.m., Salon C Coradini A. Ice Rocks Posters, Thu, p.m., Gym Delaney J. S. CAis, AOAs, Dis Posters, Thu, p.m., Gym Cordier P. Print Only: IDPs Delaney J. S. Print Only: Meteorites Cormier M-H. Mars Tectonics, Wed, a.m., Salon C DelanoJ. W. Lunar Regolith, Tue, p.m., Salon A Cornish T. J. Future Missions Posters, Thu, p.m., Gym Delano J. W. Lunar Impacts Posters, Tue, p.m., Gym Correia M. lo Burns, Thu, p.m., Salon B Delapp D. M. Borrelly and Eros, Wed, p.m., Salon C Corrigan C. M. * ALH 84001, Fri, a.m., Marina Plaza Delaune P. Print Only: Mars Costard F. Mars Geology Posters, Tue, p.m., Gym Deloule E. Chondrites Posters, Tue, p.m., Gym Costard F. Mars Landers Posters, Tue, p.m., Gym DelouleE* Martian Meteorites, Thu, p.m., Salon C Costard F. Martian Gullies, Thu, a.m., Salon B Demantoux F. Mars Landers Posters, Tue, p.m., Gym Cottrell E. A.* Planetary Formation, Tue, p.m., Salon C Demidova S. I. Lunar Impacts Posters, Tue, p.m., Gym CovielloM. Astrobiology, Wed, p.m., Salon B Demura H. Lunar Remote Sensing Posters, Tue, p.m., Gym Craddock R. A. Mars Geology, Mon, p.m., Salon B Demyk K. Print Only: IDPs Craddock R. A. Mars Oceans Posters, Thu, p.m., Gym Denise M. Chondrites Posters, Tue, p.m., Gym

150 33rd LPSC Program Index Denk T. Io Burns, Thu, p.m., Salon B Edmonds J. Between Rock/Cold Place Posters, Thu, p.m., Gym Denning D. Martian Surface Posters, Tue, p.m., Gym EdmunsonJ. Martian Meteorites Posters, Thu, p.m., Gym Derenne S.* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Edwards K. Lunar Regolith, Tue, p.m., Salon A Des Marais D. Mars Future Missions Posters, Thu, p.m., Gym Edwards L. E. Cratered Earth Posters, Tue, p.m., Gym Desch S. J.* Chondrules/Solar System, Tue, a.m., Marina Plaza Eichhorn G. Future Missions Posters, Thu, p.m., Gym Desch S. J. Origins, Fri, a.m., Salon A Ekholm A. G. Europa's Icy Shell, Thu, a.m., Salon A Desnoyers D. W. Venus/Mercury Posters, Tue, p.m., Gym El Goresy A.* Cratered Earth, Mon, a.m., Salon C DespanD. Mars Aeolian Posters, Thu, p.m., Gym El Goresy A. Ordinary Chondrites, Mon, p.m., Salon C Di Cencio A. Mars Geology Posters, Tue, p.m., Gym El Goresy A. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Di Lorenzo S. Mars Landers Posters, Tue, p.m., Gym Eliason E. Lunar Basalts, Wed, a.m., Salon A Dickey J. O. Lunar Geophysics Posters, Tue, p.m., Gym Eliason E. M. Mars Data Posters, Tue, p.m., Gym Dickinson T. L. Achondrites Posters, Thu, p.m., Gym Eliason E. M. Mars Future Missions Posters, Thu, p.m., Gym Diedrich T. R. Martian Surface Posters, Tue, p.m., Gym Elkins Tanton L. T* Cratered Earth, Mon, a.m., Salon C DikovYn. P. Lunar Impacts Posters, Tue, p.m., Gym Elkins Tanton L. T. * Lunar Cratering, Mon, p.m., Salon A DikovYu. P. Lunar Bas~lts, Wed, a.m., Salon A Elphic R. C. Lunar Regolith, Tue, p.m., Salon A DikovYu. P. Lunar Basalts Posters, Thu, p.m., Gym Elphic R. C. Odyssey Results, Tue, p.m., Salon B Dimen A. Education Posters, Tue, p.m., Gym Elphic R. C.* Lunar Basalts, Wed, a.m., Salon A Di6sy T. Future Missions Posters, Thu, p.m., Gym Elphic R. C. Borrelly and Eros, Wed, p.m., Salon C DiPalma J. Future Missions Posters, Thu, p.m., Gym Elwood Madden M. E. Print Only: Mars Dixon E. T. Chronology Posters, Tue, p.m., Gym ElyJ. C. Early Moon, Mon, a.m., Salon A Dobraynskii Yu. P. Print Only: Craters ElyJ. C. Planetary Formation, Tue, p.m., Salon C Doggett T. C. Print Only: Venus Eng P. CAis, AOAs, Dis Posters, Thu, p.m., Gym DohrnJ. Future Missions Posters, Thu, p.m., Gym Englert P. A. J. Odyssey Results, Tue, p.m., Salon B DohrnJ. M. Mars Volcanism, Mon, a.m., Salon B Engrand C. IDPs!Micrometeorites, Mon, p.m., Marina Plaza DohrnJ. M. Mars Data Posters, Tue, p.m., Gym EppC. Mars Future Missions Posters, Thu, p.m., Gym DohmJ.M* Mars Tectonics, Wed, a.m., Salon C Erard S. Mars Aeolian Posters, Thn, p.m., Gym DohrnJ. M. Mars History, Thu, a.m., Salon C Erard S. Surprising Things Posters, Thu, p.m., Gym DohrnJ. M. Mars Tectonics Posters, Thu, p.m., Gym Erasov A. Odyssey Results, Tue, p.m., Salon B Dole H. J. Astrobiology Posters, Thu, p.m., Gym Ernst C. M. Cratering Processes Posters, Tue, p.m., Gym Dollfus A. Print Only: Venus ErnstR. E. Venus/Mercury Posters, Tue, p.m., Gym Domanik K. J. Achondrites Posters, Thu, p.m., Gym Ershow E. D. Mars Geology Posters, Tue, p.m., Gym Dombard A. J* Venus Geology/Geophysics, Tue, a.m., Salon A ESA Science Team Astrobiology Posters, Thu, p.m., Gym Dombard A. J. Mars History, Thu, a.m., Salon C Esposito P. Odyssey Results, Tue, p.m., Salon B Dombard A. J. Three Icy Moons Posters, Thu, p.m., Gym Eugster O. Melted Meteorites, Thu, a.m., Marina Plaza Domeneghetti C. Achondrites Posters, Thu, p.m., Gym Eugster O.* Martian Meteorites, Thu, p.m., Salon C Domingue D. Between Rock/Cold Place Posters, Thu, p.m., Gym Eugster O. Martian Meteorites Posters, Thu, p.m., Gym Domingue D. Three Icy Moons Posters, Thu, p.m., Gym Evans L. G. Odyssey Results, Tue, p.m., Salon B Dones L* Lunar Cratering, Mon, p.m., Salon A Evans L. G.* Borrelly and Eros, Wed, p.m., Salon C Donohue P. J. Education Posters, Tue, p.m., Gym Fabre C. Martian Surface Posters, Tue, p.m., Gym Donovan c:;. Surprising Things Posters, Thu, p.m., Gym Fagan T. J. Pushing Technical Frontiers Posters, Tue, p.m., Dors E. E. Future Missions Posters, Thu, p.m., Gym Gym DouglasS. Astrobiology Posters, Thu, p.m., Gym Fagan T. J.* Refractory Inclusions, Thu, p.m., Marina Plaza Doute' S. Io Burns, Thu, p.m., Salon B Fagents S. A. Mars Volcanism Posters, Tue, p.m., Gym Drake D. M. Odyssey Results, Tue, p.m., Salon B Fairen A. G. Planetary Formation Posters, Tue, p.m., Gym Drake D. Lunar Regolith Posters, Tue, p.m., Gym Fairen A. G. Print Only: Mars DrakeM. J.* Planetary Formation, Tue, p.m., Salon C Faleide J. I. Cratered Earth Posters, Tue, p.m., Gym DrakeM. J. Achondrites Posters, Thu, p.m., Gym Fallacaro A. Mars Remote Sensing, Wed, p.m., Marina Plaza Draper D. Planetary Formation, Tue, p.m., Salon C Farley M.A. Mars Geology, Mon, p.m., Salon B Draper D. S. Planetary Formation Posters, Tue, p.m., Gym Farnsworth J. T. IDPs!Microrneteorites Posters, Tue, p.m., Gym Dreibus G* Mars History, Thu, a.m., Salon C Farquhar J. * Carbonaceous Chondrites, Tue, p.m., Marina Plaza Dreibus G. Martian Meteorites Posters, Thu, p.m., Gym Farrand W. H* Mars Infrared Spectroscopy, Tue, a.m., Salon B Drobyshevski E. M. Print Only: Origins Farrand W. H. Martian Surface Posters, Tue, p.m., Gym DrossartP. Ice Rocks Posters, Thu, p.m., Gym Farrand W. H. Mars Remote Sensing, Wed, p.m., Marina Plaza DruetM. Print Only: Mars Farrand W. H. Print Only: Mars DS I Science Team Borrelly and Eros, Wed, p.m., Salon C Farrar K. S. Three Icy Moons Posters, Thu, p.m., Gym Dubessy J. Martian Surface Posters, Tue, p.m., Gym FeiY. Planetary Formation, Tue, p.m., Salon C Dunham D. W. Cratering Processes Posters, Tue, p.m., Gym FeiY. Martian Surface Posters, Tue, p.m., Gym Dunin-Borkowski R. E. ALH 8400 I, Fri, a.m., Marina Plaza Feldman J. Astrobiology Posters, Thu, p.m., Gym DunnR. Print Only: Mars Feldman W. C. Lunar Regolith, Tue, p.m., Salon A Duprat J. IDPs!Micrometeorites, Mon, p.m., Marina Plaza Feldman W. C* Odyssey Results, Tue, p.m., Salon B DupratJ. Print Only: IDPs Feldman W. C. Lunar Remote Sensing Posters, Tue, p.m., Gym DurdaD. D* Small Bodies, Thu, p.m., Salon A Feldman W. C. Lunar Regolith Posters, Tue, p.m., Gym d'Uston C. Odyssey Results, Tue, p.m., Salon B Feldman W. C. Lunar Basalts, Wed, a.m., Salon A d'Uston C. Lunar Regolith Posters, Tue, p.m., Gym Fel'dman V.I. Print Only: Craters Dutch S. I. Mars Landers Posters, Tue, p.m., Gym FentonL. K* Dust Devils, Fri, a.m., Salon C Duxbury E. D. Mars Data Posters, Tue, p.m., Gym Fergason R. L. * Mars Geology, Mon, p.m., Salon B Duxbury T. C. Mars Data Posters, Tue, p.m., Gym Ferlito C. Planetary Formation Posters, Tue, p.m., Gym Dwyer A. Odyssey Results, Tue, p.m., Salon B Fernandes V. A. Lunar Basalts Posters, Thu, p.m., Gym DyarM.D.* Cratered Earth, Mon, a.m., Salon C Fernandez Remolar D* Astrobiology, Wed, p.m., Salon B DyarM. D. Martian Surface Posters, Tue, p.m., Gym Ferris J. C. Mars Tectonics, Wed, a.m., Salon C DyarM. D. Martian Meteorites, Thu, p.m., Salon C Ferris M. Future Missions Posters, Thu, p.m., Gym DyarM. D. Lunar Basalts Posters, Thu, p.m., Gym Ferris M. J. Martian Surface Posters, Tue, p.m., Gym DyarM. D. Mars Oceans Posters, Thu, p.m., Gym Ferro D. Lunar Regolith Posters, Tue, p.m., Gym DyarM. D. Print Only: Meteorites Fessler B. Lunar Regolith, Tue, p.m., Salon A DyarM. D. Print Only: Mars Fetters J. Education Posters, Tue, p.m., Gym DypvikH. Cratering Processes Posters, Tue, p.m., Gym FichetP. Martian Surface Posters, Tue, p.m., Gym Ebe!D. S. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Figueredo P. H. Three Icy Moons Posters, Thu, p.m., Gym Ebihara M. Iron Meteorites Posters, Tue, p.m., Gym FikeD. Mars Landers Posters, Tue, p.m., Gym Economou T. E. Martian Surface Posters, Tue, p.m., Gym Fike D. Mars Oceans Posters, Thu, p.m., Gym Edgett K. S. Martian Gullies, Thu, a.m., Salon B FinkW. Mars Data Posters, Tue, p.m., Gym

33rd LPSC Program Index ______151 Finkel R. C. Martian Meteorites Posters, Thu, p.m., Gym Gardner J. E. Mars Volcanism Posters, Tue, p.m., Gym Fioretti A. M. Melted Meteorites, Thu, a.m., Marina Plaza Garel E. Mars Tectonics, Wed, a.m., Salon C Fischer F. IDPs!Micrometeorites Posters, Tue, p.m., Gym Garrison D. H. Chronology Posters, Tue, p.m., Gym Fisenko A. V. Isotopes Posters, Thu, p.m., Gym Garry J. R. C. Future Missions Posters, Thu, p.m., Gym Fishbaugh K E.* Martian Poles, Wed, a.m., Salon B Garvie L A. J. Carbonaceous Chondrites Posters, Tue, p.m., Gym Fishbaugh K E. Mars Polar Terrain Posters, Thu, p.m., Gym Garvin J. B. Mars Geology, Mon, p.m., Salon B Fitz-Gerald J. Future Missions Posters, Thu, p.m., Gym Garvin J. B. Mars Craters Posters, Thu, p.m, Gym Flanders J. Print OnJy: Mars Garvin J. B* Dust Devils, Fri, a.m., Salon C Fleischer R. L Print OnJy: Meteorites Gary S. P. Borrelly and Eros, Wed, p.m., Salon C Flor E. L Lunar Basalts Posters, Thu, p.m., Gym Gasnault O. Odyssey Results, Tue, p.m, Salon B Floss C* Ordinary Chondrites, Mon, p.m., Salon C Gasnault O. Lunar Remote Sensing Posters, Tue, p.m., Gym Floss C. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Gasnault O. Lunar Regolith Posters, Tue, p.m., Gym Floss C. IDPs!Micrometeorites Posters, Tue, p.m., Gym Gasnault O.* Lunar Basalts, Wed, a.m., Salon A Floyd S. R. Borrelly and Eros, Wed, p.m., Salon C Gasnault O. M. Lunar Regolith, Tue, p.m., Salon A Flynn G. J* IDPs!Micrometeorites, Mon, p.m., Marina Plaza Gavira J. Future Missions Posters, Thu, p.m., Gym Flynn G. J. Small Bodies, Thu, p.m., Salon A Gazis P. Mars Data Posters, Tue, p.m., Gym Flynn G. J. Martian Meteorites Posters, Thu, p.m., Gym Geise B. Between Rock/Cold Place Posters, Thu, p.m, Gym Flynn G. J* ALH 84001, Fri, a.m., Marina Plaza Geissler P. Europa's Icy Shell, Thu, a.m, Salon A FOCAS Team Between Rock/Cold Place Posters, Thu, p.m., Gym Geissler P. Io Burns, Thu, p.m., Salon B FolcoL Chondrites Posters, Tue, p.m., Gym Geissler P. E. Mars Geology Posters, Tue, p.m., Gym Foley C. N. Martian Surface Posters, Tue, p.m., Gym Geissler P. E. Mars Aeolian Posters, Thu, p.m, Gym Forder S.D. Print Only: Meteorites Geissler P. E. Three Icy Moons Posters, Thu, p.m., Gym Forget F Mars Geology Posters, Tue, p.m., Gym Geissler P. E. Io Posters, Thu, p.m., Gym Forget F. Martian Gullies, Thu, a.m., Salon B Genda H. Planetary Formation Posters, Tue, p.m., Gym Formisano V. Ice Rocks Posters, Thu, p.m., Gym Gendrin A. Mars Aeolian Posters, Thu, p.m., Gym Forney L Mars Future Missions Posters, Thu, p.m., Gym Genetay L Lunar Regolith Posters, Tue, p.m., Gym Fort D. Mars Future Missions Posters, Thu, p.m., Gym Genetay L Lunar Basalts, Wed, a.m., Salon A Fox G. E. Chondrules/Solar System, Tue, a.m., Marina Plaza Genge M. J.* IDPs!Micrometeorites, Mon, p.m., Marina Plaza Fox G. E. Astrobiology Posters, Thu, p.m., Gym George T. Astrobiology Posters, Thu, p.m., Gym FoxJ. Mars Data Posters, Tue, p.m., Gym Gerasimov M. V. Lunar Impacts Posters, Tue, p.m., Gym Franchi L A. Cratered Earth, Mon, a.m., Salon C Gerasimov M. V.* Lunar Basalts, Wed, a.m., Salon A Franchi L A. Carbonaceous Chondrites Posters, Tue, p.m., Gym Gerszewski M. Education Posters, Tue, p.m., Gym Franchi I. A. Isotopes Posters, Thu, p.m., Gym Gesztesi A. Mars Polar Terrain Posters, Thu, p.m., Gym Franchi I. A. Future Missions Posters, Thu, p.m., Gym Gesztesi A. Print OnJy: Mars Frankel R. B. ALH 84001, Fri, a.m., Marina Plaza Ghail R. C. Venus Geology/Geophysics, Tue, a.m., Salon A Franklin B. J. Mars Flowing Ice, Fri, a.m., Salon B GhailR. C. Venus/Mercury Posters, Tue, p.m., Gym Franzen M. Surprising Things Posters, Thu, p.m., Gym Ghail R. C. Three Icy Moons Posters, Thu, p.m, Gym Franzen M. Future Missions Posters, Thu, p.m., Gym Ghatan G. J. * Mars Volcanism, Mon, a.m., Salon B Frawley J. J. Dust Devils, Fri, a.m., Salon C Ghosh A. Mars Geophysics Posters, Thu, p.m., Gym Frazee P. Education Posters, Tue, p.m., Gym GhoshM. Mars Future Missions Posters, Thu, p.m., Gym Freeman J. Martian Surface Posters, Tue, p.m., Gym Giardino J. R. Mars Oceans Posters, Thu, p.m., Gym Frei R. Planetary Formation, Tue, p.m., Salon C GiberK Print OnJy: Astrobiology French B. M. Cratered Earth, Mon, a.m., Salon C Gibson E. K Jr ALH 84001, Fri, a.m., MarinaPiaza French L M. Between Rock/Cold Place Posters, Thu, p.m., Gym Gibson E. K Jr. Martian Surface Posters, Tue, p.m., Gym Frey H. V* Mars Geology, Mon, p.m., Salon B GibsonR. L Cratered Earth Posters, Tue, p.m., Gym Frey H. V. Mars Geology Posters, Tue, p.m., Gym Giese B. Borrelly and Eros, Wed, p.m., Salon C Frey H. V. Mars History, Thu, a.m., Salon C Giguere T. A. Lunar Basalts Posters, Thu, p.m., Gym Frey S. Lunar Geophysics Posters, Tue, p.m., Gym Gillespie A R. Martian Surface Posters, Tue, p.m., Gym Friefuich J. M. * Ordinary Chondrites, Mon, p.m., Salon C Gillet Ph. Cratered Earth, Mon, a.m., Salon C Fritz J. Martian Meteorites Posters, Thu, p.m., Gym Gillet Ph. Carbonaceous Chondrites, Tue, p.m., Matina Plaza Fruneau B. Cratered Earth Posters, Tue, p.m., Gym Gillet Ph. Martian Meteorites Posters, Thu, p.m, Gym Fujihara T. Mars Craters Posters, Thu, p.m., Gym Gillis J. J. Lunar Regolith, Tue, p.m., Salon A Fujiwara A. IDPs!Micrometeorites Posters, Tue, p.m., Gym Gillis J. J. Lunar Remote Sensing Posters, Tue, p.m., Gym Fujiwara A. Between Rock/Cold Place Posters, Thu, p.m., Gym Gillis J. J. Lunar Regolith Posters, Tue, p.m., Gym Fuller E. R.* Mars Geology, Mon, p.m., Salon B Gillis J. J* Lunar Basalts, Wed, a.m., Salon A FullerM. Astrobiology Posters, Thu, p.m., Gym Gillis J. J. Lunar Basalts Posters, Thu, p.m., Gym Funs ten H. O. Borrelly and Eros, Wed, p.m., Salon C GilmoreM. S. Mars Landers Posters, Tue, p.m., Gym Fuse T. Between Rock/Cold Place Posters, Thu, p.m., Gym Gilmore M. S* Martian Gullies, Thu, a.m., Salon B Gaddis L Print Only: Venus GilmoreM. S. Astrobiology Posters, Thu, p.m., Gym Gaddis L R. Mars Infrared Spectroscopy, Tue, a.m., Salon B Gilmour!* Cratered Earth, Mon, a.m., Salon C Gaddis L R. Lunar Basalts, Wed, a.m., Salon A Gilmour I. Organic Material Posters, Tue, p.m., Gym Gaddis L R. Mars Remote Sensing Posters, Thu, p.m., Gym Gilmour I. Astrobiology Posters, Thu, p.m., Gym Gaetani G. Ordinary Chondrites, Mon, p.m., Salon C GilmourJ. D. Melted Meteorites, Thu, a.m, Marina Plaza Gaffey M. J* Small Bodies, Thu, p.m., Salon A Gilmour J. D. Martian Meteorites, Thu, p.m., Salon C Gaffey M. J. Surprising Things Posters, Thu, p.m., Gym Gilmour J. D. Isotopes Posters, Thu, p.m., Gym Gaffey M. J. Ice Rocks Posters, Thu, p.m., Gym GilpinL* Planetary Formation, Tue, p.m., Salon C Gagnepain-Beyneix J. Early Moon, Mon, a.m., Salon A Gimelshein N. E. Io Posters, Thu, p.m., Gym Gaidos E. Europa's Icy Shell, Thu, a.m., Salon A Giinelshein S. F Io Posters, Thu, p.m., Gym Galileo NIMS Team Io Burns, Thu, p.m., Salon B Giorgini J. D. Small Bodies, Thu, p.m., Salon A Galileo PPR Team Io Burns, Thu, p.m., Salon B Giorgini J. D. Surprising Things Posters, Thu, p.m., Gym Galileo SSI Team Io Burns, Thu, p.m., Salon B Gitlin A. R. Mars Data Posters, Tue, p.m., Gym Gallino R. Presolar Grains I, Wed, a.m., Marina Plaza Gittings H. E. Mars Geology Posters, Tue, p.m., Gym Galuszka D. Venus/Mercury Posters, Tue, p.m., Gym Glamoclija M. Astrobiology Posters, Thu, p.m., Gym GamberT. Mars Future Missions Posters, Thu, p.m., Gym Glass B. J. Cratered Earth Posters, Tue, p.m, Gym Ganguly J. Melted Meteorites, Thu, a.m., Marina Plaza Glass B. P. Cratering Processes Posters, Tue, p.m., Gym Ganguly J. Refractory Inclusions, Thu, p.m., Matina Plaza Glavin D. P. Astrobiology Posters, Thu, p.m., Gym Ganti T. Mars Polar Terrain Posters, Thu, p.m, Gym Glaze L. Martian Gullies, Thu, a.m., Salon B Ganti T. Print OnJy: Mars Glaze L S. Mars Volcanism, Mon, a.m., Salon B Garcia T. Education Posters, Tue, p.m, Gym Glaze L. S* Mars Volcanism, Mon, a.m., Salon B Garcia A. Planetary Formation Posters, Tue, p.m., Gym Glotch T. D. Martian Surface Posters, Tue, p.m., Gym

152 33rd LPSC Program Index GodseyR. D. Surprising Things Posters, Thu, p.m., Gym Grokhovsky V. I. Print Only: Meteorites Goetz W. Print Only: Mars Groop E. E. Mars Future Missions Posters, Thu, p.m., Gym GohnG. S. Cratering Processes, Tue, a.m., Salon C Grosfils E. B. Venus/Mercury Posters, Tue, p.m., Gym Gohn G. S. Cratered Earth Posters, Tue, p.m., Gym Grosfils E. B* Mars Tectonics, Wed, a.m., Salon C Golden D. C. Martian Surface Posters, Tue, p.m., Gym Grosfils E. B. Print Only: Venus Golden D. C. ALH 84001, Fri, a.m., Marina Plaza Grossman L. Early Solar System, Mon, a.m., Marina Plaza GoldmanK. Achondrites Posters, Thu, p.m., Gym Grossman L. Refractory Inclusions, Thu, p.m., Marina Plaza Goldsby D. L. Mars Flowing Ice, Fri, a.m., Salon B Grossman L. CA!s, AOAs, Dis Posters, Thu, p.m., Gym Goldstein D. B. Io Posters, Thu, p.m., Gym Grove T. L. Lunar Cratering, Mon, p.m., Salon A Goldstein R. Borrelly and Eros, Wed, p.m., Salon C Grove T. L. Melted Meteorites, Thu, a.m., Marina Plaza Goldstein R. H. Astrobiology Posters, Thu, p.m., Gym GruenE. IDPsfMicrometeorites Posters, Tue, p.m., Gym Goldsten J. O. Borrelly and Eros, Wed, p.m., Salon C GrundyW. M. Mars Geology Posters, Tue, p.m., Gym GolombekM. Mars Landers Posters, Tue, p.m., Gym Grunthaner F. J. Mars Future Missions Posters, Thu, p.m., Gym Golombek M. P. * Mars Tectonics, Wed, a.m., Salon C Guan Y.* Early Solar Systeru, Mon, a.m., Marina Plaza Golombek M. P. Mars History, Thu, a.m., Salon C Guan Y. Carbonaceous Chondrites Posters, Tue, p.m., Gym Golombek M. P. Mars Tectonics Posters, Thu, p.m., Gym Guan Y. Refractory Inclusions, Thu, p.m., Marina Plaza Golubeva L. F. Print Only: Comets Guan Y. ALH 84001, Fri, a.m., Marina Plaza Goodrich C. A* Melted Meteorites, Thu, a.m., Marina Plaza Guba P. Origins Posters, Thu, p.m., Gym Goodrich C. A. Martian Meteorites Posters, Thu, p.m., Gym Guest J. E. Venus/Mercury Posters, Tue, p.m., Gym Goodrich C. A. Achondrites Posters, Thu, p.m., Gym Guidry S. A. Astrobiology Posters, Thu, p.m., Gym Gopel c. Martian Meteorites Posters, Thu, p.m., Gym Guinness E. A. Mars Data Posters, Tue, p.m., Gym Gorelick N. Odyssey Results, Tue, p.m., Salon B Guinness E. A. Mars Landers Posters, Tue, p.m., Gym Gorenstein P. Borrelly and Eros, Wed, p.m., Salon C Gulick V. C. Mars Data Posters, Tue, p.m., Gym Goreva J. Mars Future Missions Posters, Thu, p.m., Gym Gulick V. C. Mars Landers Posters, Tue, p.m., Gym Goreva J. S* ALH 84001, Fri, a.m., Marina Plaza GulickV. C. Mars Oceans Posters, Thu, p.m., Gym Gorevan S. P. Future Missions Posters, Thu, p.m., Gym GulickV. C. Mars Future Missions Posters, Thu, p.m., Gym GorinV. D. Print Only: Meteorites GunterM. E. Print Only: Meteorites Gorn L. Odyssey Results, Tue, p.m., Salon B Gural P. S. Cratering Processes Posters, Tue, p.m., Gym Gorshkov A. I. Lunar Basalts Posters, Thu, p.m., Gym Gurov E. P. Cratered Earth, Mon, a.m., Salon C GortonM. Cratered Earth Posters, Tue, p.m., Gym Hacar A. Planetary Formation Posters, Tue, p.m., Gym Gosling J. Future Missions Posters, Thu, p.m., Gym Hackwell J. H. Mars Remote Sensing Posters, Thu, p.m., Gym GotoM. Between Rock/Cold Place Posters, Thu, p.m., Gym Hager B. H. Lunar Cratering, Mon, p.m., Salon A Goudy C. L. Mars Tectonics Posters, Thu, p.m., Gym Hagerty J. J. Lunar Basalts Posters, Thu, p.m., Gym GounelleM. Refractory Inclusions, Thu, p.m., Marina Plaza Hagerty J. J. Dust Devils, Fri, a.m., Salon C GounelleM. Print Only: Meteorites Haghighipour N. * Origins, Fri, a.m., Salon A Gourier D. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Hagiya K. H. IDPs!Micrometeorites, Mon, p.m., Marina Plaza Grady C. A. Astrobiology Posters, Thu, p.m., Gym Hahmann A. N. Cratering Processes, Tue, a.m., Salon C GradyM. M. IDPsfMicrometeorites, Mon, p.m., Marina Plaza HahnJ. M. Ice Rocks Posters, Thu, p.m., Gym GradyM. M. Martian Meteorites Posters, Thu, p.m., Gym HahnJ. M.* Origins, Fri, a.m., Salon A Graham G. A. IDPsfMicrometeorites Posters, Tue, p.m., Gym Haldemann A. Mars Landers Posters, Tue, p.m., Gym Grant C. S. Future Missions Posters, Thu, p.m., Gym Haldemann A. F. C. Mars Volcanism, Mon, a.m., Salon B Grant J. Mars Landers Posters, Tue, p.m., Gym Haldemann A. F. C. Mars Data Posters, Tue, p.m., Gym Grant J. A. Mars Data Posters, Tue, p.m., Gym Haldemann A. F. C. Mars Tectonics Posters, Thu, p.m., Gym GrantJ. A. Mars Future Missions Posters, Thu, p.m., Gym Hale A. S. Small Bodies, Thu, p.m., Salon A GrantJ. A.* Mars Flowing Ice, Fri, a.m., Salon B Hale A. S. Surprising Things Posters, Thu, p.m., Gym Grasby S. E. Astrobiology, Wed, p.m., Salon B Halekas J. Mars Magnetics/Mercury, Wed, p.m., Salon A Grassel O. Clash of Titans Posters, Thu, p.m., Gym Halekas J. S. Lunar Regolith, Tue, p.m., Salon A Grassineau N. V. Astrobiology, Wed, p.m., Salon B Halekas J. S. Lunar Geophysics Posters, Tue, p.m., Gym Graves C. Mars Future Missions Posters, Thu, p.m., Gym Halliday A. N. Early Solar .Systeru, Mon, a.m., Marina Plaza Greeley R. Mars Volcanism Posters, Tue, p.m., Gym Halliday A. N. Origins, Fri, a.m., Salon A Greeley R. Io Burns, Thu, p.m., Salon B HamabeY. IDPsfMicrometeorites Posters, Tue, p.m., Gym Greeley R. Mars Oceans Posters, Thu, p.m., Gym Hamara D. Odyssey Results, Tue, p.m., Salon B Greeley R. Mars Aeolian Posters, Thu, p.m., Gym HamaraD. Mars Remote Sensing Posters, Thu, p.m., Gym Greeley R. Three Icy Moons Posters, Thu, p.m., Gym Hamilton V. E* Mars Infrared Spectroscopy, Tue, a.m., Salon B Greeley R. Future Missions Posters, Thu, p.m., Gym Hamilton V. E. Martian Surface Posters, Tue, p.m., Gym Greeley R. Dust Devils, Fri, a.m., Salon C Hamilton V. E. Mars Remote Sensing, Wed, p.m., Marina Plaza Greeley R. Print Only: Mars Hammer C. Print Only: IDPs Greeley R. Print Only: Outer Solar System Hanchar J. M. Astrobiology Posters, Thu, p.m., Gym Green 0. R. Astrobiology, Wed, p.m., Salon B HandorinS. Odyssey Results, Tue, p.m., Salon B Greenberg R. Europa's Icy Shell, Thu, a.m., Salon A Hanley J. J. Borrelly and Eros, Wed, p.m., Salon C Greenberg R. Surprising Things Posters, Thu, p.m., Gym Hansen C. J. Mars Data Posters, Tue, p.m., Gym Greenberg R. Three Icy Moons Posters, Thu, p.m., Gym Hansen C. J. Mars Future Missions Posters, Thu, p.m., Gym Greenspon J. A. Print Only: Future Missions Hansen G. B. Three Icy Moons Posters, Thu, p.m., Gym Greenwood J. P. Astrobiology Posters, Thu, p.m., Gym Hansen V. L* Venus Geology/Geophysics, Tue, a.m., Salon A Greenwood R. C. Carbonaceous Chondrites Posters, Tue, p.m., Gym Hans~n V. L. Venus/Mercury Posters, Tue, p.m., Gym Gregg T. K. P* Mars Volcanism, Mon, a.m., Salon B Hapke B. Small Bodies, Thu, p.m., Salon A Gregg T. K. P. Mars Geology Posters, Tue, p.m., Gym Hapke B. W. Surprising Things Posters, Thu, p.m., Gym Gregg T. K. P. Mars Volcanism Posters, Tue, p.m., Gym Harbert W. Mars Oceans Posters, Thu, p.m., Gym Gregg T. K. P. Planetary Formation Posters, Tue, p.m., Gym HarchA. Education Posters, Tue, p.m., Gym Gregg T. K. P. Mars Tectonics Posters, Thu, p.m., Gym Hardersen P. S* Small Bodies, Thu, p.m., Salon A Greshake A. Carbonaceous Chondrites Posters, Tue, p.m., Gym Hare T. Mars Volcanism, Mon, a.m., Salon B Greshake A. Martian Meteorites Posters, Thu, p.m., Gym Hare T. Mars Geology, Mon, p.m., Salon B Grier J. A. Mars Volcanism Posters, Tue, p.m., Gym Hare T. Venus/Mercury Posters, Tue, p.m., Gym Grieve R. A. F. Cratering Processes Posters, Tue, p.m., Gym Hare T. Borrelly and Eros, Wed, p.m., Salon C Griffiths A. D. Mars Landers Posters, Tue, p.m., Gym Hare T. M. Mars Geology Posters, Tue, p.m., Gym GrimmR. E. Mars Oceans Posters, Thu, p.m., Gym Hare T. M. Mars Landers Posters, Tue, p.m., Gym GrinE. A. Mars Landers Posters, Tue, p.m., Gym HareT. M. Mars Tectonics, Wed, a.m., Salon C Grin E. A. Martian Gullies, Thu, a.m., Salon B HareT. M. Martian Gullies, Thu, a.m., Salon B GrinE. A. Mars Oceans Posters, Thu, p.m., Gym Hare T. M. Future Missions Posters, Thu, p.m., Gym Grinspoon D. H. Lunar Cratering, Mon, p.m., Salon A Hargitai H. Education Posters, Tue, p.m., Gym

33rd LPSC Program lndex ______l53 Harker D. E.* Origins, Fri, a.m., Salon A Herring J. Martian Surface Posters, Tue, p.m., Gym Harloff J. Martian Surface Posters, Tue, p.m., Gym Herrmann S. Martian Meteorites Posters, Thu, p.m., Gym HarmonJ. K* Mars Magnetics/Mercury, Wed, p.m., Salon A Hertzsch J-M. Cratering Processes Posters, Tue, p.m., Gym Harpold D. N. Future Missions Posters, Thu, p.m., Gym Hervig R. L. ALH 84001, Fri, a.m., Marina Plaza Harris A. 1. L. Mars Volcanism Posters, Tue, p.m., Gym Herwig F. Origins, Fri, a.m., Salon A Harris B. A. Venus/Mercury Posters, Tue, p.m., Gym Herzog G. F. IDPs/Micrometeorites, Mon, p.m., Marina Plaza Harrison K. H. Mars Oceans Posters, Thu, p.m., Gym Hewins R. H.* Chondrules/Solar System, Tue, a.m., Marina Plaza Harrit N. Print Only: Mars Heymann D. Astrobiology Posters, Thu, p.m., Gym HartS. D. Small Bodies, Thu, p.m., Salon A Hezel D. C.* Chondrules/Solar System, Tue, a.m., Marina Plaza Hartmann W. K. * Lunar Cratering, Mon, p.m., Salon A Hibbitts C. A. Martian Surface Posters, Tue, p.m., Gym Hartmann W. K. Mars Infrared Spectroscopy, Tue, a.m., Salon B HicksM. D. Borrelly and Eros, Wed, p.m., Salon C Hartmann W. K. Martian Poles, Wed, a.m., Salon B HicksM. D. Ice Rocks Posters, Thu, p.m., Gym Hartmann W. K. * Martian Gullies, Thu, a.m., Salon B Hicks T. Refractory Inclusions, Thu, p.m., Marina Plaza Haruyama J. Lunar Remote Sensing Posters, Tue, p.m., Gym Hicks T. L. Pnshing Technical Frontiers Posters, Tue, p.m., Haruyama J. Lunar Basalts Posters, Thu, p.m., Gym Gym Harvey R. P. ALH 84001, Fri, a.m., Marina Plaza HidakaH. Lunar Impacts Posters, Tue, p.m., Gym Hasegawa S. Cratering Processes Posters, Tue, p.m., Gym Hidaka H. Astrobiology Posters, Thu, p.m., Gym Hasegawa S. Between Rock/Cold Place Posters, Thu, p.m., Gym Hiesinger H.* Mars Geology, Mon, p.m., Salon B Hashizume K* Lunar Regolith, Tue, p.m., Salon A Hiesinger H.* Lunar Basalts, Wed, a.m., Salon A Hasiotis S. T. Astrobiology Posters, Thu, p.m., Gym HigbieM. A. Mars Geology Posters, Tue, p.m., Gym Hasizume K. Lunar Impacts Posters, Tue, p.m., Gym Higgins B. J. Cratering Processes Posters, Tue, p.m., Gym Haskin L. Mars Future Missions Posters, Thu, p.m., Gym HikidaH. Surprising Things Posters, Thu, p.m., Gym Haskin L.A. Lunar Regolith, Tue, p.m., Salon A Hildebrand A. R. Cratered Earth Posters, Tue, p.m., Gym Haskin L.A. Lunar Remote Sensing Posters, Tue, p.m., Gym Hill D. H. Achondrites Posters, Thu, p.m., Gym Haskin L.A. Lunar Regolith Posters, Tue, p.m., Gym HillH.G.M. Astrobiology, Wed, p.m., Salon B Haskin L.A. Mars Landers Posters, Tue, p.m., Gym Hill H. G.M. Astrobiology Posters, Thu, p.m., Gym Haskin L.A. Print Only: Moon HineA. A. Print Only: Outer Solar System Hassler S. W. Cratered Earth, Mon, a.m., Salon C Hirai K. CAis, AOAs, Dis Posters, Thu, p.m., Gym Hathi B. Mars Data Posters, Tue, p.m., Gym Hirata N. Lunar Remote Sensing Posters, Tue, p.m., Gym Hauber E. Mars Geology, Mon, p.m., Salon B Hirai T. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Hauber E. Mars Geology Posters, Tue, p.m., Gym Hiroi T. Small Bodies, Thu, p.m., Salon A Hauber E. Mars Volcanism Posters, Tue, p.m., Gym Hirai T. Surprising Things Posters, Thu, p.m.: Gym Hauber E. Mars Oceans Posters, Thu, p.m., Gym Hirota A. Cratered Earth Posters, Tue, p.m., Gym Hauck S. A. II Mars History, Thu, a.m., Salon C Hirschmann A. Martian Surface Posters, Tue, p.m., Gym Hauck S. A. II Three Icy Moons Posters, Thu, p.m., Gym Hittle J.D. Mars Future Missions Posters, Thu, p.m., Gym Hawke B. R. Lunar Remote Sensing Posters, Tue, p.m., Gym HiyagonH. CAis, AOAs, Dis Posters, Thu, p.m., Gym Hawke B. R.* Lunar Basalts, Wed, a.m., Salon A HladiukD. Cratered Earth Posters, Tue, p.m., Gym Hawke B.R. Lunar Basalts Posters, Thu, p.m., Gym HoG. C. Borrelly and Eros, Wed, p.m., Salon C Hayes J. Mars Future Missions Posters, Thu, p.m., Gym HoashiM. Astrobiology Posters, Thu, p.m., Gym Head J. W. Mars Volcanism Posters, Tue, p.m., Gym Hoffman E. J. Achondrites Posters, Thu, p.m., Gym HeadJ. W. Venus/Mercury Posters, Tue, p.m., Gym HoffmanN. Mars Polar Terrain Posters, Thu, p.m., Gym HeadJ. W. Io Burns, Thu, p.m., Salon B HoffmanN.* Mars Flowing Ice, Fri, a.m., Salon B Head J. W. III Mars Volcanism, Mon, a.m., Salon B Hofmeister A. M. Presolar Grains I, Wed, a.m., Marina Plaza Head J. W. III Mars Geology, Mon, p.m., Salon B Hofschus ter G. IDPs/Micrometeorites Posters, Tue, p.m., Gym Head J. W. III Venus Geology/Geophysics, Tue, a.m., Salon A HoganR.H. Mars Remote Sensing Posters, Thu, p.m., Gym Head J. W. III Lunar Remote Sensing Posters, Tue, p.m., Gym Hohenberg C. M. Early Solar System, Mon, a.m., Marina Plaza Head J. W. III Lunar Basalts, Wed, acm., Salon A Hohenberg C. M. Chondrules/Solar System, Tue, a.m., Marina Plaza Head J. W. III* Martian Poles, Wed, a.m., Salon B Hohenberg C. M. Chronology Posters, Tue, p.m., Gym HeadJ. W. Ill Mars Tectonics, Wed, a.m., Salon C Hohenberg C. M. Presolar Grains II, Wed, p.m., Marina Plaza Head J. W. III Europa's Icy Shell, Thu, a.m., Salon A Hohner G. J. Mars Geology Posters, Tue, p.m., Gym HeadJ. W. Ill Mars History, Thu, a.m., Salon C Holinl. V. Lunar Geophysics Posters, Tue, p.m., Gym Head J. W. III Mars Tectonics Posters, Thu, p.m., Gym Holin I. V* Mars Magnetics/Mercury, Wed, p.m., Salon A Head J. W. III Mars Polar Terrain Posters, Thu, p.m., Gym Holland G. Melted Meteorites, Thu, a.m., Marina Plaza Head J. W. III Mars Oceans Posters, Thu, p.m., Gym Holland G. Isotopes Posters, Thu, p.m., Gym Head J. W. III Mars Flowing Ice, Fri, a.m., Salon B Holsapple K. A.* Cratering Processes, Tue, a.m., Salon C HeapS. R. Astrobiology Posters, Thu, p.m., Gym Holsapple K. A.* Small Bodies, Thu, p.m., Salon A Heber V. S. Lunar Regolith Posters, Tue, p.m., Gym Hongsresawat S. Iron Meteorites Posters, Tue, p.m., Gym Hecht L. Martian Meteorites Posters, Thu, p.m., Gym Hood L. L. Lunar Regolith, Tue, p.m., Salon A HechtM. H. Mars Future Missions Posters, Thu, p.m., Gym Hood L. L. Lunar Geophysics Posters, Tue, p.m., Gym Heggy E. Mars Landers Posters, Tue, p.m., Gym Hood L. L.* Mars Magnetics/Mercury, Wed, p.m., Salon A Hegyi A. Future Missions Posters, Thu, p.m., Gym Hood L. L. Mars Geophysics Posters, Thu, p.m., Gym Hegyi S. Future Missions Posters, Thu, p.m., Gym Hood L. L. Origins, Fri, a.m., Salon A Heineck J. T. Cratering Processes, Tue, a.m., Salon C Hood L. L. Print Only: Moon Henderson G. Surprising Things Posters, Thu, p.m., Gym HookS. J. Martian Surface Posters, Tue, p.m., Gym Hendrix A. Three Icy Moons Posters, Thu, p.m., Gym Hoppa G. V. Europa's Icy Shell, Thu, a.m., Salon A Hendrix A. R. Lunar Remote Sensing Posters, Tue, p.m., Gym Hoppa G. V. Three Icy Moons Posters, Thu, p.m., Gym Henkel T. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Hoppe P. Early Solar System, Mon, a.m., Marina Plaza Henning Th. Origins, Fri, a.m., Salon A Hoppe P. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Herbert M. S. Iron Meteorites Posters, Tue, p.m., Gym HoppeP* Presolar Grains I, Wed, a.m., Marina Plaza Herd C. D. K* Martian Meteorites, Thu, p.m., Salon C HoppeP. CAis, AOAs, Dis Posters, Thu, p.m., Gym Herd R. K. Chondrites Posters, Tue, p.m., Gym Horanyi M. Surprising Things Posters, Thu, p.m., Gym Herkenhoff K. E. Mars Geology Posters, Tue, p.m., Gym Hori S. Lunar Basalts Posters, Thu, p.m., Gym Herkenhoff K. E. Mars Data Posters, Tue, p.m., Gym Hornemann U. Cratered Earth, Mon, a.m., Salon C Herkenhoff K. E. Mars Landers Posters, Tue, p.m., Gym Horton J. W. Jr. Cratered Earth Posters, Tue, p.m., Gym Herkenhoff K. E. Martian Poles, Wed, a.m., Salon B Horton K. A. Mars Landers Posters, Tue, p.m., Gym Herkenhoff K. E. Mars Polar Terrain Posters, Thu, p.m., Gym Horton K. A. Mars Future Missions Posters, Thu, p.m., Gym Herkenhoff K. E. Mars Future Missions Posters, Thu, p.m., Gym Horttor R. L. Mars Future Missions Posters, Thu, p.m., Gym Herr K. C. Mars Infrared Spectroscopy, Tue, a.m., Salon B Horvath A. Mars Polar Terrain Posters, Thu, p.m., Gym Herr K. C. Mars Remote Sensing Posters, Thu, p.m., Gym Horvath A. Print Only: Mars Herrick R. R. Mars Geology Posters, Tue, p.m., Gym Horvath Cs. Future Missions Posters, Thu, p.m., Gym

154 33rd LPSC Program Index Horz F* Cratered Earth, Man, a.m., Salon C Jaeger W. L* Io Burns, Thu, p.m., Salon B Horz F. Borrelly and Eros, Wed, p.m., Salon C Jaeger W. L. lo Posters, Thu, p.m., Gym Housely R. M. Lunar Basalts Posters, Thu, p.m., Gym JaehgerM. Print Only: Mars Hausen K. R. * Cratering Processes, Tue, a.m., Salon C Jager C. Origins, Fri, a.m, Salon A Howard A. D. Mars Oceans Posters, Thu, p.m., Gym Jagoutz E. Mars History, Thu, a.m., Salon C Howard A D. Mars Flowing Ice, Fri, a.m., Salon B Jagoutz E.* Melted Meteorites, Thu, a.m., Marina Plaza Howard L. M. Achondrites Posters, Thu, p.m., Gym Jagoutz E. Martian Meteorites, Thu, p.m., Salon C Howell E. S. Small Bodies, Thu, p.m., Salon A J akosky B. M. Odyssey Results, Tue, p.m., Salon B Howell E. S. Surprising Things Posters, Thu, p.m., Gym Jakosky B. M. Mars Landers Posters, Tue, p.m., Gym Howington-Kraus E. Lunar Remote Sensing Posters, Tue, p.m., Gym Jakosky B. M. Astrobiology, Wed, p.m., Salon B Howington-Kraus E. Mars Landers Posters, Tue, p.m., Gym Jakosky B. M. Mars History, Thu, a.m., Salon C Howington-Kraus E. Venus/Mercury Posters, Tue, p.m., Gym Jakosky B. M. Astrobiology Posters, Thu, p.m., Gym Howington-Kraus E. Borrelly and Eros, Wed, p.m., Salon C JambonA. Martian Meteorites Posters, Thu, p.m., Gym Howington-Kraus E. Between Rock/Cold Place Posters, Thu, p.m., Gym James C. L. Lunar Regolith, Tue, p.m., Salon A HoyerM. Mars Oceans Posters, Thu, p.m., Gym James 0. B.* Lunar Cratering, Man, p.m., Salon A· HsuW. Presolar Grains I, Wed, a.m., Marina Plaza Jansma P. Borrelly and Eros, Wed, p.m., Salon C HuaX* Early Solar System, Man, a.m., Marina Plaza Jarosewich E. Between Rock/Cold Place Posters, Thu, p.m., Gym HuaX. Carbonaceous Chondrites Posters, Tue, p.m., Gym Jarvis K. S. Between Rock/Cold Place Posters, Thu, p.m., Gym Huang Y. Astrobiology Posters, Thu, p.m., Gym Jarvis K. S. Ice Rocks Posters, Thu, p.m., Gym Hubble H. W. Mars Future Missions Posters, Thu, p.m., Gym JaumannR. Mars Geology, Mon, p.m., Salon B Hudoba Gy. Future Missions Posters, Thu, p.m., Gym JaumannR. Mars Geology Posters, Tue, p.m., Gym HumayunM* Chondrules/Solar System, Tue, a.m., Marina Plaza JaumannR. Mars Data Posters, Tue, p.m., Gym HumayunM. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Jaumann R. Lunar Basalts, Wed, a.m., Salon A Humes D. H. Print Only: Moon Jaumann R. Martian Gullies, Thu, a.m., Salon B HuntP. A Chondrites Posters, Tue, p.m., Gym JaumannR. Mars Oceans Posters, Thu, p.m., Gym Hupp J. Mars Future Missions Posters, Thu, p.m., Gym JaumannR. Ice Rocks Posters, Thu, p.m., Gym HurfordT. A. Jr. Three Icy Moons Posters, Thu, p.m., Gym Jaumann R.* Mars Flowing Ice, Fri, a.m., Salon B Hurley K. Borrelly and Eros, Wed, p.m., Salon C JavoyM. Carbonaceous Chondrites Posters, Tue, p.m., Gym Hurowitz J. A. Martian Surface Posters, Tue, p.m., Gym Jennings C. L. * Presolar Grains I, Wed, a.m., Marina Plaza Russ G. R. Early Solar System, Man, a.m., Marina Plaza Jephcoat A. P. Astrobiology, Wed, p.m., Salon B Russ G. R* Chondrules/Solar System, Tue, a.m., Marin.a Plaza JepsenP. L. Mars Future Missions Posters, Thu, p.m., Gym Russ G. R. Isotopes Posters, Thu, p.m., Gym Jerman G. A. Achondrites Posters, Thu, p.m., Gym Hustoft J. W. Planetary Formation Posters, Tue, p.m., Gym Jemsletten J. A. Mars Geology Posters, Tue, p.m., Gym Hutchison W. E.* Mars Magnetics/Mercury, Wed, p.m., Salon A Jessberger E. K. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Hutchison W. E. Mars History, Thu, a.m., Salon C Jeszensky H. Future Missions Posters, Thu, p.m., Gym HuthJ. Lunar Basalts, Wed, a.m., Salon A Johnson C. L* Venus Geology/Geophysics, Tue, a.m., Salon A Hvidberg C. S* Martian Poles, Wed, a.m., Salon B Johnson C. L. Venus/Mercury Posters, Tue, p.m., Gym Hyde T. W. Surprising Things Posters, Thu, p.m., Gym Johnson C. L. Mars History, Thu, a.m., Salon C Hyde T. W. Origins, Fri, a.m., Salon A Johnson C. M. Martian Meteorites, Thu, p.m., Salon C Hynek B. M* Mars Volcanism, Man, a.m., Salon B Johnson G. H. Cratered Earth Posters, Tue, p.m., Gym Hynek B. M. Mars Geology, Man, p.m., Salon B Johnson J. R. Cratered Earth, Man, a.m., Salon C Igarashi G. Cratering Processes Posters, Tue, p.m., Gym Johnson J. R.* Mars Infrared Spectroscopy, Tue, a.m., Salon B Igenbergs E. IDPs!Micrometeorites Posters, Tue, p.m., Gym Johnson J. R. Mars Geology Posters, Tue, p.m., Gym Ihinger P. D * ALH 84001, Fri, a.m., Marina Plaza Johnson J. R. Mars Landers Posters, Tue, p.m., Gym Ikeda Y. Print Only: Meteorites Johnson J. R. Print Only: Mars Il'inB. Odyssey Results, Tue, p.m., Salon B Johnson K. M. Education Posters, Tue, p.m., Gym ImaeN. Martian Meteorites Posters, Thu, p.m., Gym Johnson T. V. Io Burns, Thu, p.m., Salon B Imamura T. Future Missions Posters, Thu, p.m., Gym Johnson W. T. K. Mars Future Missions Posters, Thu, p.m., Gym Imrek Gy. Future Missions Posters, Thu, p.m., Gym JoliffB. Early Solar System, Man, a.m., Marina Plaza IRCS Team Between Rock/Cold Place Posters, Thu, p.m., Gym Jolliff B. L. * Lunar Regolith, Tue, p.m., Salon A Ireland T. R.* Early Solar System, Man, a.m., Marina Plaza Jolliff B. L. Lunar Remote Sensing Posters, Tue, p.m., Gym Irving A. J. Education Posters, Tue, p.m., Gym Jolliff B. L. Lunar Regolith Posters, Tue, p.m., Gym Irwin R. P. III Mars Geology, Mon, p.m., Salon B Jolliff B. L. Mars Landers Posters, Tue, p.m., Gym Irwin R. P. Til Mars Oceans Posters, Thu, p.m., Gym Jolliff B. L. Lunar Basalts, Wed, a.m., Salon A Irwin R. P. III* Mars Flowing Ice, Fri, a.m., Salon B Jolliff B. L. Lunar Basalts Posters, Thu, p.m., Gym Isaev V. S. Mars Geology Posters, Tue, p.m., Gym Jolliff B. L. Print Only: Moon Isbell C. Borrelly and Eros, Wed, p.m., Salon C Jones D. L. Print Only: Future Missions Ishi T. Lunar Impacts Posters, Tue, p.m., Gym Jones D. T. L. Iron Meteorites Posters, Tue, p.m., Gym Ishiguro M. Between Rock/Cold Place Posters, Thu, p.m., Gym Jones J. H. Ordinary Chondrites, Mon, p.m., Salon C Ishii T. Martian Meteorites Posters, Thu, p.m., Gym Jones J. H* Planetary Formation, Tue, p.m., Salon C Ito M.* Refractory Inclusions, Thu, p.m., Marina Plaza Jones l H. Iron Meteorites Posters, Tue, p.m., Gym ltohS* Refractory Inclusions, Thu, p.m., Marina Plaza Jones J. H. Martian Meteorites, Thu, p.m., Salon C Ivanov A B. Mars Data Posters, Tue, p.m., Gym Jones J. H. Martian Meteorites Posters, Thu, p.m., Gym Ivanov A V. Lunar Basalts Posters, Thu, p.m., Gym Jones~. H. Carbonaceous Chondrites Posters, Tue, p.m., Gym Ivanov B. A. Lunar Cratering, Man, p.m., Salon A Jones R. H. Education Posters, Tue, p.m., Gym Ivanov B. A* Cratering Processes, Tue, a.m., Salon C Jones R. H.* Refractory Inclusions, Thu, p.m., Marina Plaza Ivanov B. A. Cratering Processes Posters, Tue, p.m., Gym Jones S. Mars Future Missions Posters, Thu, p.m., Gym Ivanov B. A. Europa's Icy Shell, Thu, a.m., Salon A JoswiakD. IDPs!Micrometeorites, Man, p.m., Marina Plaza Ivanov B. A. Surprising Things Posters, Thu, p.m., Gym Joswiak D. J. IDPs!Micrometeorites Posters, Tue, p.m., Gym Ivanov M.A. Mars Volcanism Posters, Tue, p.m., Gym Jotter R. Melted Meteorites, Thu, a.m., Marina Plaza Ivanova M. A. Carbonaceous Chondrites Posters, Tue, p.m., Gym Joyal T. Martian Gullies, Thu, a.m., Salon B lvanova M. A. Achondrites Posters, Thu, p.m., Gym Jozsa S. Education Posters, Tue, p.m., Gym Iversen J. Dust Devils, Fri, a.m., Salon C JurdyD. M. Venus/Mercury Posters, Tue, p.m., Gym Ivliev A. I. Print Only: Meteorites JurdyD. M. Io Posters, Thu, p.m., Gym Izett G. A. Cratered Earth Posters, Tue, p.m., Gym Jurewicz A. J. G. Mars Future Missions Posters, Thu, p.m., Gym Jackson T. Organic Material Posters, Tue, p.m., Gym Jurewicz S. R. Astrobiology Posters, Thu, p.m., Gym Jackson T. L. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Jurgens R. F. Mars Landers Posters, Tue, p.m., Gym Jacobsen C. IDPs!Micrometeorites, Man, p.m., Marina Plaza Jurgens R. F. Venus/Mercury Posters, Tue, p.m., Gym Jacobsen S. B. Planetary Formation, Tue, p.m., Salon C Jurgens R. F. Small Bodies, Thu, p.m., Salon A Jacobsen S. B.* Mars History, Thu, a.m., Salon C Jurgens R. F. Print Only: Venus

33rd LPSC Program lndex 155 Justus C. G. Odyssey Results, Tue, p.m., Salon B Kimura M. Print Only: Meteorites Kabai S. Education Posters, Tue, p.m., Gym Kinch K. M. Print Only: Mars Kabai S. Future Missions Posters, Thu, p.m., Gym King D. T. Jr. Surprising Things Posters, Thu, p.m., Gym Kadono T. Cratering Processes Posters, Tue, p.m., Gym King J.D. Mars Geology Posters, Tue, p.m., Gym Kaiden H. Lunar Impacts Posters, Tue, p.m., Gym King J.D. Mars Volcanism Posters, Tue, p.m., Gym Kaiden H. Achondrites Posters, Thu, p.m., Gym Kirk R. Lunar Remote Sensing Posters, Tue, p.m., Gym Kaiho K.* Cratered Earth, Mon, a.m., Salon C Kirk R. Venus/Mercury Posters, Tue, p.m., Gym Kalinina G. V. Print Only: Meteorites Kirk R. Between Rock/Cold Place Posters, Thu, p.m., Gym Kallianpur K. J. Mars Volcanism Posters, Tue, p.m., Gym · Kirk R. L. Mars Data Posters, Tue, p.m., Gym Kamenetsky V. S. Lunar Basalts Posters, Thu, p.m., Gym Kirk R. L. Mars Landers Posters, Tue, p.m., Gym Kamo S. L. Cratering Processes Posters, Tue, p.m., Gym Kirk R. L. Martian Poles, Wed, a.m., Salon B Kamp L. W. Io Burns, Thu, p.m., Salon B Kirk R. L. Borrelly and Eros, Wed, p.m., Salon C Kamp L. W. Io Posters, Thu, p.m., Gym Kirk R. L. Mars Polar Terrain Posters, Thu, p.m., Gym Kareev M. Future Missions Posters, Thu, p.m., Gym Kirk R. L. Mars Future Missions Posters, Thu, p.m., Gym Kareev M. S* Borrelly and Eros, Wed, p.m., Salon C Kirkland L. Astrobiology Posters, Thu, p.m., Gym Kargel J. S* Martian Poles, Wed, a.m., Salon B Kirkland L. E.* Mars Infrared Spectroscopy, Tue, a.m., Salon B Kargel J. S. Mars Polar Terrain Posters, Thu, p.m., Gym Kirkland L. E. Mars Remote Sensing Posters, Thu, p.m., Gym Kargel J. S. Three Icy Moons Posters, Thu, p.m., Gym K.irschvink J. L.* ALH 84001, Fri, a.m., Marina Plaza Karner J. M. Planetary Formation Posters, Tue, p.m., Gym Kitts K.* Early Solar System, Mon, a.m., Marina Plaza Karner J. M. Education Posters, Tue, p.m., Gym Klaasen K. P. Io Burns, Thu, p.m., Salon B Karner J. M. Print Only: Moon Klaue B. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Kashikawa N. Between Rock/Cold Place Posters, Thu, p.m., Gym Klemaszewsk:i J. E. Cratered Earth Posters, Tue, p.m., Gym Kashiv Y.* Presolar Grains II, Wed, p.m., Marina Plaza Kleppe A. K. Astrobiology, Wed, p.m., Salon B Kashkarov L. L. Print Only: Meteorites Klonowski S. Martian Gullies, Thu, a.m., Salon B Kass D. Mars Landers Posters, Tue, p.m., Gym Kloss C. Odyssey Results, Tue, p.m., Salon B Kassing R. Future Missions Posters, Thu, p.m., Gym Kluge. Martian Surface Posters, Tue, p.m., Gym KatoM. Lunar Remote Sensing Posters, Tue, p.m., Gym Klug S. L. Odyssey Results, Tue, p.m., Salon B Kattenhorn S. A. Three Icy Moons Posters, Thu, p.m., Gym Klug S. L. Education Posters, Tue, p.m., Gym Kawamura T. IDPs/Micrometeorites Posters, Tue, p.m., Gym KminekG. Astrobiology Posters, Thu, p.m., Gym Kaydash V. Print Only: Moon Knauth L. P. Martian Gullies, Thu, a.j!l., Salon B Kearsley A. T. Organic Material Posters, Tue, p.m., Gym KnizeM. G. Astrobiology, Wed, p.m., Salon B Kearsley A. T. IDPs/Micrometeorites Posters, Tue, p.m., Gym Knocke P. Mars Landers Posters, Tue, p.m., Gyin Keating G. Odyssey Results, Tue, p.m., Salon B Knoll A. H. Astrobiology, Wed, p.m., Salon B Kedves M. Cratered Earth, Mon, a.m., Salon C KnudsenJ. M Print Only: Mars Kedves M. Cratered Earth Posters, Tue, p.m., Gym KnudsenO. Martian Gullies, l)m, a.m., Salon B Keil K. Carbonaceous Chondrites Posters, Tue, p.m., Gym Kobayashi A. K. ALH 84001, Fri, a.m., Marina Plaza KeilK. Pushing Technical Frontiers Posters, Tue, p.m., Kobayashi N. Between Rock/Cold Place Posters, Thu, p.m., Gym Gym · KoehN. A. Venus/Mercury Posters, Tue, p.m., Gym KeilK. Melted Meteorites, Thu, a.m., Marina Plaza Koch-Milller M. Martian Surface Posters, Tue, p.m., Gym KeilK. Refractory Inclusions, Thu, p.m., Marina Plaza Kodama S. Lunar Basalts Posters, Thu, p.m., Gym Kei!K. CAis, AOAs, Dis Posters, Thu, p.m., Gym Koeberl C.* Cratered Earth, Mon, a.m., Salon C KeilK. Achondrites Posters, Thu, p.m., Gym Koeberl C. Chondrites Posters, Tue, p.m., Gym KeimE. R. Mars Remote Sensing Posters, Thu, p.m., Gym Kohlstedt D. L. Planetary Formation Posters, Tue, p.m., Gym Keller F. Martian Meteorites Posters, Thu, p.m., Gym Koide Y. Refractory Inclusions, Thu, p.m., Marina Plaza Keller L. P.* IDPs/Micrometeorites, Mon, p.m., Marina Plaza Koizumi E.* Martian Meteorites, Thu, p.m., Salon C Keller L. P. Lunar Regolith, Tue, p.m., Salon A Kojima H. Early Moon, Mon, a.m., Salon A Keller L. P. Lunar Regolith Posters, Tue, p.m., Gym Kojima H. Lunar Impacts Posters, Tue, p.m., Gym Keller L. P. ALH 84001, Fri, a.m., Marina Plaza Kojima H. Refractory Inclusions, Thu, p.m., Marina Plaza KelleyM. S. Small Bodies, Thu, p.m., Salon A Kojima H. Martian Meteorites Posters, Thu, p.m., Gym Kelly D. C. Cratered Earth, Mon, a.m., Salon C Kolar S. E. Achondrites Posters, Thu, p.m., Gym Kemper F. Origins, Fri, a.m., Salon A KolbE. J* Martian Poles, Wed, a.m., Salon B Kenkmann T* Cratered Earth, Mon, a.m., Salon C Kolotenko I. R. Print Only: Future Missions Kenkmann T. * Cratering Processes, Tue, a.m., Salon C Komarow I. A. Mars Geology Posters, Tue, p.m., Gym KenkmannT. Cratering Processes Posters, Tue, p.m., Gym Komatsu G. Mars Geology Posters, Tue, p.m., Gym Keresztesi M. Future Missions Posters, Thu, p.m., Gym Komatsu G. Mars Volcanism Posters, Tue, p.m., Gym Kereszturi A. Venus/Mercury Posters, Tue, p.m., Gym Komatsu G. Cratered Earth Posters, Tue, p.m., Gym Kereszturi A. Education Posters, Tue, p.m., Gym KomatsuM. CAis, AOAs, Dis Posters, Thu, p.m., Gym Kereszturi A. Surprising Things Posters, Thu, p.m., Gym Kondabarov A. Odyssey Results, Tue, p.m., Salon B Kereszturi A. Three Icy Moons Posters, Thu, p.m., Gym Kong K. Y. Future Missions Posters, Thu, p.m., Gym Kereszttiri A. Print Only: Origins Korokhin V. V. Print Only: Moon Kessel R.* Ordinary Chondrites, Mon, p.m., Salon C Korotev R. Early Solar System, Mon, a.m., Marina Plaza Keszthelyi L. Mars Volcanism Posters, Tue, p.m., Gym Korotev R. L. * Lunar Regolith, Tue, p.m., Salon A Keszthelyi L. Mars Data Posters, Tue, p.m., Gym Korotev R. L. Lunar Remote Sensing Posters, Tue, p.m., Gym Keszthelyi L. * Io Burns, Thu, p.m., Salon B Korotev R. L. Lunar Regolith Posters, Tue, p.m., Gym Keszthelyi L. Mars Future Missions Posters, Thu, p.m., Gym Korotev R. L. Lunar Basalts, Wed, a.m., Salon A Keszthelyi L. P. Io Posters, Thu, p.m., Gym Korotev R. L. Print Only: Moon Kesztheyli L. P. Mars Flowing Ice, Fri, a.m., Salon B Kosarev I. B. Mars Craters Posters, Thu, p.m., Gym Ketcham R. A. Melted Meteorites, Thu, a.m., Marina Plaza Kostama V -P. Mars Geology Posters, Tue, p.m., Gym KettnerM. Mars Aeolian Posters, Thu, p.m., Gym Kostama V-P. Venus/Mercury Posters, Tue, p.m., Gym Khan A.* Early Moon, Mon, a.m., Salon A Kostama V-P. Cratered Earth Posters, Tue, p.m., Gym Khan A. Lunar Geophysics Posters, Tue, p.m., Gym Kostama V-P. Mars Craters Posters, Thu, p.m., Gym Kiefer W. S. Education Posters, Tue, p.m., Gym Kovacs Zs. Future Missions Posters, Thu, p.m., Gym Kiefer W. S* Mars Magnetics/Mercury, Wed, p.m., Salon A Koziol A. M. * ALH 84001, Fri, a.m., Marina Plaza Kieffer H. H .. Odyssey Results, Tue, p.m., Salon B Kozlov A. H. Mars Geology Posters, Tue, p.m., Gym Kieffer H. H. Martian Poles, Wed, a.m., Salon B Kozlov E. A. Print Only: Craters Killgore M. Ordinary Chondrites, Mon, p.m., Salon C Kozyrev A. Odyssey Results, Tue, p.m., Salon B Kim S. ALH 84001, Fri, a.m., Marina Plaza Kozyrev A. Mars Remote Sensing Posters, Thu, p.m., Gym Kimura H. Mars Oceans Posters, Thu, p.m., Gym Kracher A.* Melted Meteorites, Thu, a.m., Marina Plaza Kimura J. Three Icy Moons Posters, Thu, p.m., Gym KraftM. D. Martian Surface Posters, Tue, p.m., Gym Kimura M.* Ordinary Chondrites, Mon, p.m., Salon C Krassilnikov A. S. Venus/Mercury Posters, Tue, p.m., Gym

156 33rd LPSC Program Index Kravets L. I. Print Only: Meteorites Lawrence D. J. Lunar Remote Sensing Posters, Tue, p.m., Gym Kreslavsky M. Print Only: Moon Lawrence D. J* Lunar Basalts, Wed, a.m., Salon A Kreslavsky M. A. Venus Geology/Geophysics, Tue, a.m., Salon A Lawrence D. J. Borrelly and Eros, Wed, p.m., Salon C Kreslavsky M. A. Venus/Mercury Posters, Tue, p.m., Gym Lawrence D. J. Mars Future Missions Posters, Thu, p.m., Gym Kreslavsky M. A* Martian Poles, Wed, a.m., Salon B Lawrence D. L. Lunar Basalts Posters, Thu, p.m., Gym Kreslavsky M. A. Mars Polar Terrain Posters, Thu, p.m., Gym Lawson S. L. Odyssey Results, Tue, p.m., Salon B Kress M. E. IDPs/Micrometeorites, Mon, p.m., Marina Plaza Lawson S. L. Lunar Remote Sensing Posters, Tue, p.m., Gym Krestina N. * Presolar Grains I, Wed, a.m., Marina Plaza Lawson S. L. Lunar Regolith Posters, Tue, p.m., Gym Kretke K. A. Mars Remote Sensing Posters, Thu, p.m., Gym Lazar C. Print Only: Meteorites Kring D. A.* Cratering Processes, Tue, a.m., Salon C LeL. Chondrules/Solar System, Tue, a.m., Marina Plaza Krinsley D. Mars Future Missions Posters, Thu, p.m., Gym Le L. Martian Meteorites, Thu, p.m., Salon C Krochuk R. V. Cratered Earth Posters, Tue, p.m., Gym LeL. Martian Meteorites Posters, Thu, p.m., Gym Kroeger G. Mars Tectonics, Wed, a.m., Salon C Leader F. lo Burns, Thu, p.m., Salon B Krogh T. E. Cratering Processes Posters, Tue, p.m., Gym Leader F. lo Posters, Thu, p.m., Gym Kronberg P. Mars Volcanism Posters, Tue, p.m., Gym LeakeM. A* Europa's Icy Shell, Thu, a.m., Salon A Kronrod V. A. Print Only: Moon Lederer S. M. Between RockJCold Place Posters, Thu, p.m., Gym Krot A. N. Early Solar System, Mon, a.m., Marina Plaza Lee D-C. ·Early Solar System, Mon, a.m., Marina Plaza KrotA. N. Carbonaceous Chondrites Posters, Tue, p.m., Gym Lee E. M. Mars Data Posters, Tue, p.m., Gym KrotA. N. Pushing Technical Frontiers Posters, Tue, p.m., Lee H.* Venus Geology/Geophysics, Tue, a.m., Salon A Gym LeeK. Odyssey Results, Tue, p.m., Salon B KrotA.N. Melted Meteorites, Thu, a.m., Marina Plaza LeeM. Cratering Processes Posters, Tue, p.m., Gym Krot A. N.* Refractory Inclusions, Thu, p.m, Marina Plaza LeeM. Borrelly and Eros, Wed, p.m., Salon C Krot A. N. CAis, AOAs, Dis Posters, Thu, p.m, Gym LeeP. Cratered Earth, Mon, a.m., Salon C Krnshevskaya V. N. Print Only: Origins LeeP. Cratered Earth Posters, Tue, p.m., Gym Krylov A. Odyssey Results, Tue, p.m., Salon B Lee P.* Martian Gullies, Thu, a.m., Salon B Krylov A. Mars Remote Sensing Posters, Thu, p.m., Gym LeeW. Mars Landers Posters, Tue, p.m., Gym Kubovics I. Education Posters, Tue, p.m., Gym Lees J. Mars Future Missions Posters, Thu, p.m., Gym Kuebler K. Mars Landers Posters, Tue, p.m., Gym LehtinenM. Print Only: Craters Kuebler K. Mars Future Missions Posters, Thu, p.m., Gym LemmonM. T. Mars Geology Posters, Tue, p.m., Gym Kuebler K. E. Martian Surface Posters, Tue, p.m, Gym LemmonM. T. Mars Landers Posters, Tue, p.m., Gym Kuhlman K. R. Mars Future Missions Posters, Thu, p.m., Gym LeMouelic S. Lunar Regolith, Tue, p.m., Salon A Kuhlman K. R. Origins Posters, Thu, p.m., Gym Lentz R. C. F. Planetary Formation Posters, Tue, p.m., Gym Kunihiro T. Carbonaceous Chondrites Posters, Tue, p.m., Gym Lentz R. C. F. Martian Meteorites, Thu, p.m., Salon C Kurahashi E. Surprising Things Posters, Thu, p.m., Gym Leone G. Mars Landers Posters, Tue, p.m., Gym Kuramoto K. Mars Polar Terrain Posters, Thu, p.m., Gym Leavy C. Mars Geology Posters, Tue, p.m., Gym KuratG. Carbonaceous Chondrites Posters, Tue, p.m., Gym Leavy C. Mars Aeolian Posters, Thu, p.m., Gym KuratG* Melted Meteorites, Thu, a.m., Marina Plaza Lepper K. Mars Data Posters, Tue, p.m., Gym Kurat G. CAis, AOAs, Dis Posters, Thu, p.m., Gym Lerman L. M. Astrobiology Posters, Thu, p.m., Gym KuratG. Print Only: Meteorites Leroux H. Print Only: IDPs Kurita K. Mars Craters Posters, Thu, p.m., Gym Leshin L.A. Early Solar System, Mon, a.m., Marina Plaza Kurita K. Three Icy Moons Posters, Thu, p.m., Gym LeshinL. A. Carbonaceous Ch9ndrites, Tue, p.m., Marina Plaza Kurtz M. J. Future Missions Posters, Thu, p:m., Gym Leshin L.A. Carbonaceous Chondrites Posters, Tue, p.m., Gym Kuskov 0. L. Print Only: Moon Leshin L.A. Refractory Inclusions, Thu, p.m., Marina Plaza KuulusaM. Print Only: Craters LeshinL. A. Mars Future Missions Posters, Thu, p.m., Gym KuzminR. 0. Mars Geology Posters, Tue, p.m., Gym LeshinL. A. ALH 84001, Fri, a.m., Marina Plaza KuzminR. 0. Mars Oceans Posters, Thu, p.m., Gym LesourdM. Martian Meteorites Posters, Thu, p.m., Gym Kuzmitcheva M. Y. Surprising Things Posters, Thu, p.m., Gym Letsinger S. L. Lunar Regolith, Tue, p.m., Salon A Kuznetzova J. G. Print Only: Outer Solar System Letunovskii V. Odyssey Results, Tue, p.m., Salon B Kyger J. R. Cratering Processes Posters, Tue, p.m., Gym Leverington D. W. Mars Oceans Posters, Thu, p.m., Gym Kyte F. T. * Cratered Earth, Mon, a.m., Salon C Levin D. A. Io Posters, Thu, p.m., Gym Lacour J. L. Martian Surface Posters, Tue, p.m., Gym Levine J. S. Cratered Earth Posters, Tue, p.m., Gym La gabrielle Y. Mars Tectonics, Wed, a.m., Salon C LewisR. S. Presolar Grains I, Wed, a.m., Marina Plaza Lai B. Presolar Grains II, Wed, p.m., Marina Plaza Lewis R. S. Presolar Grains II, Wed, p.m., Marina Plaza Laity J. E. Mars Aeolian Posters, Thu, p.m., Gym Leya I. Chondrites Posters, Tue, p.m., Gym Lanagan P. D. Mars Volcanism Posters, Tue, p.m., Gym Leyai* Origins, Fri, a.m., Salon A Lanagan P. D. Mars Flowing Ice, Fri, a.m., Salon B LiR. Print Only: Astrobiology LaneM. D* Mars Infrared Spectroscopy, Tue, a.m., Salon B Libourel G. IDPs/Micrometeorites, Mon, p.m., Marina Plaza LaneM. D. Martian Surface Posters, Tue, p.m, Gym Lichtene gger J. Cratered Earth Posters, Tue, p.m., Gym Lane M.D. Mars Remote Sensing Posters, Thu, p.m., Gym LilloJ. Venus/Mercury Posters, Tue, p.m., Gym LaneS. J. Mars Volcanism Posters, Tue, p.m., Gym LimL. Borrelly and Eros, Wed, p.m., Salon C LangN. P. Venus/Mercury Posters, Tue, p.m., Gym LimT. Origins, Fri, a.m., Salon A Lange M. A Cratering Processes Posters, Tue, p.m., Gym LinC-Y. Print Only: Meteorites Lanzarotti A. Print Only: Meteorites Lin R. P. Lunar Regolith, Tue, p.m., Salon A Lapen T. Martian Meteorites, Thu, p.m., Salon C LinR. P. Lunar Geophysics Posters, Tue, p.m., Gym Largeau C. Carbonaceous Chondrites, Tue, p.m., Marina Plaza LinR.P. Mars Magnetics/Mercury, Wed, p.m., Salon A Larios-Sanz M. Astrobiology Posters, Thu, p.m., Gym Lindsay B. D. Origins, Fri, a.m., Salon A LarsenK. W. Mars Landers Posters, Tue, p.m., Gym Lindsay J. F. Astrobiology, Wed, p.m., Salon B Larson S.M. Between RockJCold Place Posters, Thu, p.m., Gym Lindsley D. H. Martian Surface Posters, Tue, p.m., Gym Lauer H. V. Jr. Martian Surface Posters, Tue, p.m., Gym Lindstrom D. J. Mars Future Missions Posters, Thu, p.m., Gym Lauer H. V. Jr. ALH 84001, Fri, a.m., Marina Plaza Lindstrom M. M. Cratering Processes Posters, Tue, p.m., Gym Lauretta D. S. * Carbonaceous Chondrites, Tue, p.m., Marina Plaza Lindstrom M. M. Education Posters, Tue, p.m., Gym Lauretta D. S. Cratering Processes Posters, Tue, p.m., Gym Lipschutz M. E. Ordinary Chondrites, Mon, p.m., Salon C Lauretta D. S. Melted Meteorites, Thu, a.m., Marina Plaza Lipschutz M. E. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Lauretta D. S. Origins, Fri, a.m., Salon A Lisle J. T. Astrobiology, Wed, p.m., Salon B Lauriol B. Martian Surface Posters, Tue, p.m., Gym LISM Working Group Lunar Remote Sensing Posters, Tue, p.m., Gym LaVoie S. K. Mars Data Posters, Tue, p.m., Gym Lissauer J. J. Lunar Cratering, Mon, p.m., Salon A Lavrentyeva z. A. Print Only: Meteorites Litasov Y. Mars Volcanism Posters, Tue, p.m., Gym Lawrence D. Lunar Basalts, Wed, a.m., Salon A LitvakM. Odyssey Results, Tue, p.m., Salon B Lawrence D. J. Lunar Regolith, Tue, p.m., Salon A Litvak M. Mars Remote Sensing Posters, Thu, p.m., Gym Lawrence D. J. Odyssey Results, Tue, p.m., Salon B Litvinenko L. N. Print Only: Moon

33rd LPSC Program lndex l57 LiuM. Ordinary Chondrites, Mon, p.m., Salon C MargotJ-L. Print Only: Outer Solar System Liu S. Cratered Earth, Mon, a.m., Salon C Marinangeli L. Mars Landers Posters, Tue, p.m., Gym Liu S. Cratering Processes Posters, Tue, p.m., Gym Marinova M. M. Mars Flowing. lee, Fri, a.m., Salon B Liu Y. Z* Melted Meteorites, Thu, a.m., Marina Plaza Maras G. Education Posters, Tue, p.m., Gym Livingston D. Education Posters, Tue, p.m., Gym MarovM. Ya. Print Only: Venus Lofgren G. E* Chondrules/Solar System, Tue, a.m., Marina Plaza MarrG. Future Missions Posters, Thu, p.m., Gym Lofgren G. E. Chondrites Posters, Tue, p.m., Gym Marshall 1. R. Mars Future Missions Posters, Thu, p.m., Gym Lofgren G. E. Pushing Technical Frontiers Posters, Tue, p.m., Marston R. A. Mars Oceans Posters, Thu, p.m., Gym Gym Marti K. Iron Meteorites Posters, Tue, p.m., Gym Lofgren G. E. ALH 84001, Fri, a.m., Marina Plaza Marti K.* Small Bodies, Thu, p.m., Salon A Lognonne P. Early Moon, Mon, a.m., Salon A Marti K. Martian Meteorites Posters, Thu, p.m., Gym Longazo T. G.* Astrobiology, Wed, p.m., Salon B Martin P. Mars Geophysics Posters, Thu, p.m., Gym Longhi 1* Early Moon, Mon, a.m., Salon A Martin P. D. Mars Future Missions Posters, Thu, p.m., Gym Lopes R. M. C* Io Burns, Thu, p.m., Salon B MartinT. Z. Odyssey Results, Tue, p.m., Salon B Lopes R. M. C. Io Posters, Thu, p.m., Gym Martin T. z. lo Burns, Thu, p.m., Salon B Lopez I. Venus/Mercury Posters, Tue, p.m., Gym Martinelli D. Education Posters, Tue, p.m., Gym Lorand 1. P. Mars Geophysics Posters, Thu, p.m., Gym Martini A. M. Astrobiology Posters, Thu, p.m., Gym Lorenz C. Print Only: Craters Marty B. Early Solar System, Man, a.m., Marina Plaza Lorenz C. A. Print Only: Meteorites Marty B* IDPs/Micrometeorites, Mon, p.m., Marina Plaza Lorenz R. D. Europa's Icy Shell, Thu, a.m., Salon A Marty B. Lunar Regolith, Tue, p.m., Salon A LorenzR. D. Mars Aeolian Posters, Thu, p.m., Gym Marty B. Martian Meteorites Posters, Thu, p.m., Gym Lorenz R. D. Clash of Titans Posters, Thu, p.m., Gym Maruyama S. Mars Tectonics, Wed, a.m., Salon C Lorenz R. D. Origins Posters, Thu, p.m., Gym Maruyama S. Mars History, Thu, a.m., Salon C Lorenz R. D. Print Only: Craters Marzari F. Print Only: Planetary Formation Lorenzetti S. Martian Meteorites, Thu, p.m., Salon C Masaitis V. L. Cratered Earth, Mon, a.m., Salon C Lorre 1. 1. Mars Data Posters, Tue, p.m., Gym Masarik 1. Chondrites Posters, Tue, p.m., Gym Losseva T. V. Mars Craters Posters, Thu, p.m., Gym Masarik 1. Martian Meteorites Posters, Thu, p.m., Gym Lucchitta B. K. Mars Volcanism Posters, Tue, p.m., Gym Masarik 1. Mars Remote Sensing Posters, Thu, p.m., Gym Lucchitta B. K* Mars Tectonics, Wed, a.m., Salon C Masson P. Mars Geology Posters, Tue, p.m., Gym Lucchitta B. K. Martian Gullies, Thu, a.m., Salon B Master S. Cratered Earth Posters, Tue, p.m., Gym Lucey P. G* Lunar Regolith, Tue, p.m., Salon A Mastrapa R. M. E. Three Icy Moons Posters, Thu, p.m., Gym Lucey P. G. Lunar Remote Sensing Posters, Tue, p.m., Gym Mathew K. 1. Small Bodies, Thu, p.m., Salon A Lucey P. G. Mars Landers Posters, Tue, p.m., Gym Mathew K. 1. Martian Meteorites Posters, Thu, p.m., Gym Lucey P. G. Lunar Basalts, Wed, a.m., Salon A Matias A. Venus/Mercury Posters, Tue, p.m., Gym Lucey P. G. Lunar Basalts Posters, Thu, p.m., Gym Matrajt G. IDPs/Micrometeorites, Mon, p.m., Marina Plaza Lucey P. G. Mars Future Missions Posters, Thu, p.m., Gym Matson D. Ice Rocks Posters, Thu, p.m., Gym Lugaro M. Presolar Grains I, Wed, a.m., Marina Plaza Matson D. L* Io Burns, Thu, p.m., Salon B LugmairG. W. Early Solar System, Man, a.m., Marina Plaza Matsui K. Lunar Remote Sensing Posters, Tue, p.m., Gym LugmairG. W. Cratered Earth, Man, a.m., Salon C Matsui T. Venus/Mercury Posters, Tue, p.m., Gym Lugmair G. W. Melted Meteorites, Thu, a.m., Marina Plaza Matthews 1. Martian Gullies, Thu, a.m., Salon B Lukacs B. Print Only: Origins Mattioli G. Borrelly and Eros, Wed, p.m., Salon C Lunine 1. I* Martian Poles, Wed, a.m., Salon B MatzK-D. Mars Oceans Posters, Thu, p.m., Gym Lunine 1. I. Origins Posters, Thu, p.m., Gym MatzK-D. Mars Data Posters, Tue, p.m., Gym LuoW. Venus/Mercury Posters, Tue, p.m., Gym MauretteM. Print Only: IDPs Lutsey J. Between Rock/Cold Place Posters, Thu, p.m., Gym Maurice S. Lunar Regolith, Tue, p.m., Salon A LyulA. Yu. Print Only: Meteorites Maurice S. Lunar Regolith Posters, Tue, p.m., Gym Ma P. IDPs/Micrometeorites, Man, p.m., Marina Plaza Maurice S. Martian Surface Posters, Tue, p.m., Gym MacCarthy K. A. Lunar Impacts Posters, Tue, p.m., Gym Maurice S. Lunar Basalts, Wed, a.m., Salon A Machida R. Planetary Formation Posters, Tue, p.m., Gym Maurice S. Mars Future Missions Posters, Thu, p.m., Gym MacPherson G. 1. Early Solar System, Mon. a.m., Marina Plaza Maxwell T. A.* Mars Geology, Mon, p.m., Salon B MacPherson G. 1* Refractory Inclusions, Thu, p.m., Marina Plaza Maxwell T. A. Mars Future Missions Posters, Thu, p.m., Gym MadeyT. E. Lunar Regolith Posters, Tue, p.m., Gym Maxwell T. A. Mars Oceans Posters, Thu, p.m., Gym MadsenM. B. Print Only: Mars Maxwell T. A. Mars Flowing Ice, Fri, a. IIi, Salon B Magri C. Small Bodies, Thu, p.m., Salon A Mayeda T. K. Carbonaceous Chondrites Posters, Tue, p.m., Gym Mahaffy P. R. Future Missions Posters, Thu, p.m., Gym MazurM.J. Cratered Earth Posters, Tue, p.m., Gym Mahajan R. R. Chondrites Posters, Tue, p.m., Gym Mazzini A. Print Only: Astrobiology MahlenN. Martian Meteorites, Thu, p.m., Salon C McAfeeJ. M. Mars Remote Sensing Posters, Thu, p.m., Gym Maier C. M. Mars Geology Posters, Tue, p.m., Gym McAuleyM. Mars Data Posters, Tue, p.m., Gym Makalkin A. B. Print Only: Planetary Formation McBeeJ. H. Three Icy Moons Posters, Thu, p.m., Gym Makarenko G. F. Print Only: Moon McBride K. M. Chondrites Posters, Tue, p.m., Gym Makino K Martian Meteorites Posters, Thu, p.m., Gym McCallum!. S. Achondrites Posters, Thu, p.m., Gym Makupula S. Iron Meteorites Posters, Tue, p.m., Gym McCallum I. S. Print Only: Moon MalaretE. Mars Future Missions Posters, Thu, p.m., Gym McCanta M. C* Martian Meteorites, Thu, p.m., Salon C MalinM. Odyssey Results, Tue, p.m., Salon B McCartney E. Borrelly and Eros, Wed, p.m., Salon C MalinM.C. Martian Gullies, Thu, a.m., Salon B McClanahan T. P. Borrelly and Eros, Wed, p.m., Salon C Mamaev I. A. Print Only: Meteorites McCloskey W. R. Education Posters, Tue, p.m., Gym Mancinelli R. L. Martian Surface Posters, Tue, p.m., Gym McColleyS. Mars Volcanism, Mon, a.m., Salon B MangoldN. Mars Geology Posters, Tue, p.m., Gym McCordT. Ice Rocks Posters, Thu, p.m., Gym MangoldN. Mars Landers Posters, Tue, p.m., Gym McCoyT. J. Borrelly and Eros, Wed, p.m., Salon C MangoldN* Martian Gullies, Thu, a.m., Salon B McCoy T. J.* Melted Meteorites, Thu, a.m., Marina Plaza Mann I. IDPs/Micrometeorites Posters, Tue, p.m., Gym McCoyT. J. Small Bodies, Thu, p.m., Salon A Manning H. L. K. IDPs/Micrometeorites Posters, Tue, p.m., Gym McCoyT. J. Achondrites Posters, Thu, p.m., Gym Mantovani J. G. Mars Future Missions Posters, Thu, p.m., Gym McCoy T. J. Between Rock/Cold Place Posters, Thu, p.m., Gym Mantz A. B. Between Rock/Cold Place Posters, Thu, p.m., Gym McDonald I. Cratering Processes Posters, Tue, p.m., Gym Marakushev A. A. Print Only: Origins McElfresh S. B. Z. Mars Geology, Mon, p.m., Salon B Marchetti M. Cratered Earth Posters, Tue, p.m., Gym McElfresh S. B. z. Education Posters, Tue, p.m., Gym MardonA. A. Print Only: Future Missions McEnroe S. A. Print Only: Mars Margot 1-L. Venus/Mercury Posters, Tue, p.m., Gym McEwen A. S. Mars Geology Posters, Tue, p.m., Gym Margot 1-L. * Small Bodies, Thu, p.m., Salon A McEwen A. S. Mars Volcanism Posters, Tue, p.m., Gym Margot 1-L. Surprising Things Posters, Thu, p.m., Gym McEwen A. S. Mars Data Posters, Tue, p.m., Gym

158 33rd LPSC Program Index McEwen A. S. Mars Landers Posters, Tue, p.m., Gym Meyer B. S. Presolar Grains I, Wed, a.m., Marina Plaza McEwen A. S. Io Burns, Thu, p.m., Salon B Meyer B. S. * Origins, Fri, a.m., Salon A McEwen A. S. Mars Aeolian Posters, Thu, p.m., Gym MeyerM. A. Odyssey Results, Tue, p.m., Salon B McEwen A. S. Mars Future Missions Posters, Thu, p.m., Gym MeyerM. C. Surprising Things Posters, Thu, p.m., Gym McEwen A. S. Io Posters, Thu, p.m., Gym Mickelson B. Dust Devils, Fri, a.m., Salon C McEwen A. S. Mars Flowing Ice, Fri, a.m., Salon B Mickelson E. T. Mars Future Missions Posters, Thu, p.m., Gym McFarland E. R. Cratered Earth Posters, Tue, p.m., Gym Midgley P. A. ALB 84001, Fri, a.m., Marina Plaza McGill G. E.* Mars Volcanism, Mon, a.m., Salon B Mikheeva I. Borrelly and Eros, Wed, p.m., Salon C McGill G. E. Mars Geology, Mon, p.m., Salon B Mikouchi T* Martian Meteorites, Thu, p.m., Salon C McGill G. E. Mars Tectonics, Wed, a.m., Salon C Mikouchi T. Martian Meteorites Posters, Thu, p.m., Gym McGovern P. J. * Mars Magnetics!Mercnry, Wed, p.m., Salon A Mikouchi T. CAis, AOAs, Dis Posters, Thu, p.m., Gym McGovern P. J. Mars History, Thu, a.m., Salon C Mikouchi T. Print Only: Comets McGovern P. J. Mars Flowing Ice, Fri, a.m., Salon B MilamK. A.* Mars Infrared Spectroscopy, Tue, a.m., Salon B McHone J. F. Cratered Earth Posters, Tue, p.m., Gym Milazzo M. P. Mars Volcanism Posters, Tue, p.m., Gym McKay C. P. Martian Gullies, Thu, a.m., Salon B Milazzo M. P. * Io Burns, Thu, p.m., Salon B McKay C. P. Mars Future Missions Posters, Thu, p.m., Gym Milazzo M. P. Io Posters, Thu, p.m., Gym McKay D. S. Lunar Regolith, Tue, p.m., Salon A MilderO. B. Print Only: Meteorites McKay D. S. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Milford C. R. Education Posters, Tue, p.m., Gym McKay D. S. Lunar Regolith Posters, Tue, p.m., Gym Milkovich S. M* Martian Poles, Wed, a.m., Salon B McKay D. S. Astrobiology, Wed, p.m., Salon B Miller J.P. Education Posters, Tue, p.m., Gym McKay D. S. Martian Meteorites Posters, Thu, p.m., Gym Milliken R. E* Mars Flowing Ice, Fri, a.m., Salon B McKay D. S. Astrobiology Posters, Thu, p.m., Gym Milne A. Between Rock/Cold Place Posters, Thu, p.m., Gym McKay D. S.* ALB 84001, Fri, a.m., Marina Plaza Ming D. W. Martian Surface Posters, Tue, p.m., Gym McKay G.* Martian Meteorites, Thu, p.m., Salon C MingD.W* ALB 84001, Fri, a.m., Marina Plaza McKay G. Martian Meteorites Posters, Thu, p.m., Gym MinittiM. Mars Future Missions Posters, Thu, p.m., Gym McKay G. ALB 84001, Fri, a.m., Marina Plaza Minitti M. E .. * Mars Infrared Spectroscopy, Tue, a.m., Salon B McKeegan K. D. Early Solar System, Mon, a.m., Marina Plaza MinowaH. Iron Meteorites Posters, Tue, p.m., Gym McKeegan K. D. Refractory Inclusions, Thu, p.m., Marina Plaza Misawa K. Achondrites Posters, Thu, p.m., Gym McKeever S. W. S. Martian Snrface Posters, Tue, p.m., Gym Misra K. Lunar Impacts Posters, Tue, p.m., Gym McKeever S. W. S. Mars Data Posters, Tue, p.m., Gym Mitchell D. Mars Volcanism, Mon, a.m., Salon B McKinney G. W. Lunar Regolith, Tue, p.m., Salon A Mitchell D. Mars Volcanism Posters, Tue, p.m., Gym McKinnon W. B. Three Icy Moons Posters, Thu, p.m., Gym Mitchell D. E. Mars Craters Posters, Thu, p.m., Gym McLennan S.M. Martian Snrface Posters, Tue, p.m., Gym Mitchell D. L. Lunar Regolith, Tue, p.m., Salon A McLennan S. M* Mars History, Thu, a.m., Salon C Mitchell D. L. Lunar Geophysics Posters, Tue, p.m., Gym McSween H. Y. Jr. Ordinary Chondrites, Mon, p.m., Salon C Mitchell D. L* Mars Magnetics!Mercnry, Wed, p.m., Salon A McSween H. Y. Jr. Mars Infrared Spectroscopy, Tue, a.m., Salon B Mitchell K. L* Mars Volcanism, Mon, a.m., Salon B McSween H. Y. Jr. Odyssey Results, Tue, p.m., Salon B Mitchell K. L. Mars Volcanism Posters, Tue, p.m., Gym McSween H. Y. Jr. Chondrites Posters, Tue, p.m., Gym . Mitri G. Three Icy Moons Posters, Thu, p.m., Gym McSween H. Y. Jr* Mars History, Thu, a.m., Salon C Mitrofanov I. Odyssey Results, Tue, p.m., Salon B McSween H. Y. Jr. Martian Meteorites, Thu, p.m., Salon C Mitrofanov I. Mars Remote Sensing Posters, Thu, p.m., Gym McSween H. Y. Jr. Mars Geophysics Posters, Thu, p.m., Gym Mittlefehldt D. W. Cratered Earth, Mon, a.m., Salon C McSween H. Y. Jr. Mars Remote Sensing Posters, Thu, p.m., Gym Mittlefehldt D. W. Cratering Processes Posters, Tue, p.m., Gym MegeD* Mars Tectonics, Wed, a.m., Salon C Mittlefehldt D. W. Martian Meteorites, Thu, p.m., Salon C Mehall G. Odyssey Results, Tue, p.m., Salon B Mittlefehldt D. W. * Melted Meteorites, Thu, a.m., Marina Plaza MehlmanR. Io Burns, Thu, p.m., Salon B MittlefehldtD. W. Achondrites Posters, Thu, p.m., Gym MehokeD. Mars Future Missions Posters, Thu, p.m., Gym Minra Y. Cratered Earth, Mon, a.m., Salon C MeibomA.* Planetary Formation, Tue, p.m., Salon C Minra Y. Cratered Earth Posters, Tue, p.m., Gym MellonM. T. Mars Geology, Mon, p.m., Salon B Miyamoto H. IDPs!Micrometeorites Posters, Tue, p.m., Gym MellonM. T. Mars Data Posters, Tue, p.m., Gym Miyamoto H. Lunar Basalts Posters, Thu, p.m., Gym · MellonM. T. Mars Landers Posters, Tue, p.m., Gym Miyamoto H. Mars Flowing Ice, Fri, a.m., Salon B MellonM. T. Mars Remote Sensing Posters, Thu, p.m., Gym MiyamotoM. Small Bodies, Thu, p.m., Salon A MellonM. T. Mars Future Missions Posters, Thu, p.m., Gym MiyamotoM. Martian Meteorites, Thu, p.m., Salon C MellonM. T. Origins, Fri, a.m., Salon A MiyamotoM. Martian Meteorites Posters, Thu, p.m., Gym Melosh H. J. Planetary Formation, Tue, p.m., Salon C MiyamotoM. CAis, AOAs, Dis Posters, Thu, p.m., Gym Melosh H. J. Cratering Processes Posters, Tue, p.m., Gym MiyamotoM. Surprising Things Posters, Thu, p.m., Gym MeloshH. J* Europa's Icy Shell, Thu, a.m., Salon A MiyamotoM. Print Only: Comets Mendez A.* Astrobiology, Wed, p.m., Salon B Miyazaki K. Education Posters, Tue, p.m., Gym Mendybaev R. A.* Refractory Inclusions, Thu, p.m., Marina Plaza Mizser A. Three Icy Moons Posters, Thu, p.m., Gym Mennella V. Ice Rocks Posters, Thu, p.m., Gym Mizutani H. Early Moon, Mon, a.m., Salon A Menzies 0. N. Chondrites Posters, Tue, p.m., Gym Mizutani H. Surprising Things Posters, Thu, p.m., Gym Mercer C. N. Venus/Mercury Posters, Tue, p.m., Gym Mjolsness E. Mars Data Posters, Tue, p.m., Gym Mercier E.* Enropa's Icy Shell, Thu, a.m., Salon A Mjolsness E. Future Missions Posters, Thu, p.m., Gym Merline W. J. Three Icy Moons Posters, Thu, p.m., Gym MocquetA. Clash of Titans Posters, Thu, p.m., Gym Merrill G. K. Cratering Processes Posters, Tue, p.m., Gym MocquetA. Three Icy Moons Posters, Thu, p.m., Gym Mertzman S. A. Mars Infrared Spectroscopy, Tue, a.m., Salon B MoerschJ. Mars Infrared Spectroscopy, Tue, a.m., Salon B Meshik A. P. Chronology Posters, Tue, p.m., Gym Moersch J. E. Mars Landers Posters, Tue, p.m., Gym MeshikA. P* Presolar Grains II, Wed, p.m., Marina Plaza Mohapatra R. K. Martian Meteorites Posters, Thu, p.m., Gym Meshik A. P. Early Solar System, Mon, a.m., Marina Plaza Mokroussov M. Odyssey Results, Tue, p.m., Salon B Meshik A. P. Chondrules/Solar System, Tue, a.m., Marina Plaza MollerL. E. Mars Future Missions Posters, Thu, p.m., Gym Messenger S * IDPs!Micrometeorites, Mon, p.m., Marina Plaza Moister F. J* Planetary Formation, Tue, p.m., Salon C Messenger S. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Moister F. J. * Origins, Fri, a.m., Salon A MessengerS. Presolar Grains I, Wed, a.m., Marina Plaza MonkawaA. Martian Meteorites, Thu, p.m., Salon C MessengerS. Presolar Grains II, Wed, p.m., Marina Plaza Monkawa A. Martian Meteorites Posters, Thu, p.m., Gym MestS. C. Mars Geology, Mon, p.m., Salon B Montesi L. G. J* Venus Geology/Geophysics, Tue, a.m., Salon A Mest S.C. Mars Geology Posters, Tue, p.m., Gym Moore K. Lunar Regolith, Tue, p.m., Salon A MestS. C. Mars Oceans Posters, Thu, p.m., Gym Moore K. Odyssey Results, Tue, p.m., Salon B Metzger A. E. R. Odyssey Results, Tue, p.m., Salon B Moore K. Lunar Regolith Posters, Tue, p.m., Gym Metzger S. Dust Devils, Fri, a.m., Salon C Moore K. Between Rock/Cold Place Posters, Thu, p.m., Gym Metzger S. M. * Mars Flowing Ice, Fri, a.m., Salon B Moore K. Mars Future Missions Posters, Thu, p.m., Gym Mevel L. Europa's Icy Shell, Thu, a.m., Salon A Morbidelli A. Martian Poles, Wed, a.m., Salon B

33rd LPSC Program Index ______l59 Morgan J. V. Venus Geology/Geophysics, Tue, a.m., Salon A Neugebauer M. Future Missions Posters, Thu, p.m., Gym MorganP. Mars Oceans Posters, Thu, p.m., Gym NeukumG.* Lunar Cratering, Mon, p.m., Salon A Morlok A.* Carbonaceous Chondrites, Tue, p.m., Marina Plaza NeukumG. Lunar Remote Sensing Posters, Tue, p.m., Gym Morris P. A. Education Posters, Tue, p.m., Gym NeukumG. Mars Volcanism Posters, Tue, p.m., Gym Morris P. A.* Astrobiology, Wed, p.m., Salon B NeukumG. Venus/Mercury Posters, Tue, p.m., Gym Morris R. Mars Future Missions Posters, Thu, p.m., Gym NeukumG. Lunar Basalts, Wed, a.m., Salon A Morris R. L. Mars Data Posters, Tue, p.m., Gym Neumann G. A.* Mars Remote Sensing, Wed, p.m., Marina Plaza Morris R. V. Mars Infrared Spectroscopy, Tue, a.m., Salon B Neumann G. A. Martian Gullies, Thu, a.m., Salon B Morris R. V. Lunar Regolith, Tue, p.m., Salon A Neumann G. A. Mars History, Thu, a.m., Salon C Morris R. V. Lunar Regolith Posters, Tue, p.m., Gym Neumann G. A. Mars Remote Sensing Posters, Thu, p.m., Gym Morris R. V. Martian Surface Posters, Tue, p.m., Gym Neumann G. A. Mars Aeolian Posters, Thu, p.m., Gym Morris R. V. Astrobiology, Wed, p.m., Salon B Newsom H. E. Mars Landers Posters, Tue, p.m., Gym Morris R. V. Borrelly and Eros, Wed, p.m., Salon C Newsom H. E. Education Posters, Tue, p.m., Gym Morris R. V* Mars Remote Sensing, Wed, p.m., Marina Plaza Newsom H. E. Mars Craters Posters, Thu, p.m., Gym Morris R. V. ALH 84001, Fri, a.m., Marina Plaza Newsom H. E. Mars Future Missions Posters, Thu, p.m., Gym Morris R. V. Print Only: Mars Newsom H. E.* Dust Devils, Fri, a.m., Salon C Mosegaard K. Early Moon, Mon, a.m., Salon A Newville M. Martian Meteorites Posters, Thu, p.m., Gym Mosegaard K. Lunar Geophysics Posters, Tue, p.m., Gym Newville M. CAis, AOAs, Dis Posters, Thu, p.m., Gym Moser D. E. Chondrules/Solar System, Tue, a.m., Marina Plaza Newville M. ALH 84001, Fri, a.m., Marina Plaza Mostefaoui S. Cratered Earth, Mon, a.m., Salon C Ng T. C. Mars Landers Posters, Tue, p.m., Gym Mostefaoui S* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Nguyen A. Presolar Grains I, Wed, a.m., Marina Plaza Mouginis-Mark P. J. * Mars Volcanism, Mon, a.m., Salon B Nichols R. H. Jr. Early Solar System, Mon, a.m., Marina Plaza Mouginis-Mark P. J. Mars Volcanism Posters, Tue, p.m., Gym Nichols R. H. Jr. Chronology Posters, Tue, p.m., Gym Mousis 0. Clash of Titans Posters, Thu, p.m., Gym Nichols R. H. Jr. Presolar Grains I, Wed, a.m., Marina Plaza Mueller K. J. * Mars Tectonics, Wed, a.m., Salon C Nicholson P. Ice Rocks Posters, Thu, p.m., Gym Mueller K. J. Mars Tectonics Posters, Thu, p.m., Gym Niedermaier G. Mars Data Posters, Tue, p.m., Gym Muenzeurnayer R. IDPs!Micrometeorites Posters, Tue, p.m., Gym Niemann H. B. Future Missions Posters, Thu, p.m., Gym Miiller-Bod6 E. Future Missions Posters, Thu, p.m., Gym NilesP. B* ALH 84001, Fri, a.m., Marina Plaza Murchie S. Mars Future Missions Posters, Thu, p.m., Gym NimmoF* Mars Tectonics, Wed, a.m., Salon C Murchie S. L. Io Burns, Thu, p.m., Salon B Nimmo F. Europa's Icy Shell, Thu, a.m., Salon A Murphy J. Odyssey Results, Tue, p.m., Salon B Nimmo F. Mars Geophysics Posters, Thu, p.m., Gym MurphyM. E. Borrelly and Eros, Wed, p.m., Salon C NIMSTeam Io Posters, Thu, p.m., Gym MurphyW. Martian Gullies, Thu, a.m., Salon B Nishiizumi K Chondrites Posters, Tue, p.m., Gym Murray S. S. Future Missions Posters, Thu, p.m., Gym Nishiizumi K. Martian Meteorites Posters, Thu, p.m., Gym Murty S. V. S. Chondrites Posters, Tue, p.m., Gym Nishiizurni K. Achondrites Posters, Thu, p.m., Gym Musaev F. A. Print Only: Outer Solar System Nittler L. R. * Presolar Grains I, Wed, a.m., Marina Plaza Musselwhite D. S. Martian Meteorites Posters, Thu, p.m., Gym NittlerL. R. Borrelly and Eros, Wed, p.m., Salon C Musslewhite D. S. Achondrites Posters, Thu, p.m., Gym Nittler L. R. Presolar Grains II, Wed, p.m., Marina Plaza Mustard J. F* Mars Infrared Spectroscopy, Tue, a.m., Salon B NobleS. K. Lunar Regolith Posters, Tue, p.m., Gym Mustard J. F. Mars Future Missions Posters, Thu, p.m., Gym Noe Dobrea E. Z. * Mars Infrared Spectroscopy, Tue, a.m., Salon B Mustard J. F. Mars Remote Sensing Posters, Thu, p.m., Gym Nogami K. IDPs!Micrometeorites Posters, Tue, p.m., Gym Mustard J. F. Mars Flowing Ice, Fri, a.m., Salon B NolanM. C. Small Bodies, Thu, p.m,'Salon A Nagahara H* Planetary Formation, Tue, p.m., Salon C NolanM. C. Surprising Things Posters, Thu, p.m., Gym Nagao K. Martian Meteorites Posters, Thu, p.m., Gym NolanM. C. Print Only: Outer Solar System Nagashima K. Carbonaceous Chondrites Posters, Tue, p.m., Gym NollettK. M.* Presolar Grains I, Wed, a.m., Marina Plaza Nakafuji G. Astrobiology, Wed, p.m., Salon B Nordholt J. E. Borrelly and Eros, Wed, p.m., Salon C Nakamura A.M. Print Only: Meteorites Nordholt J. E. Future Missions Posters, Thu, p.m., Gym Nakamura K. Borrelly and Eros, Wed, p.m., Salon C Noreen E. Mars Geology Posters, Tue, p.m., Gym NakamuraM. Future Missions Posters, Thu, p.m., Gym NormanM. D. Early Moon, Mon, a.m., Salon A Nakamura T. Mars Polar Terrain Posters, Thu, p.m., Gym NormanM. D. Lunar Impacts Posters, Tue, p.m., Gym Naumann W. IDPs!Micrometeorites Posters, Tue, p.m., Gym NormanM. D. Lunar Basalts Posters, Thu, p.m., Gym Nayak V. K. Print Only: Craters NtJrmanM.D. Mars Geophysics Posters, Thu, p.m., Gym Nazarov M. A. Carbonaceous Chondrites Posters, Tue, p.m., Gym NormanM. D. Print Only: Moon Nazarov M. A. Lunar Impacts Posters, Tue, p.m., Gym Nowicki A. W. Martian Surface Posters, Tue, p.m., Gym Nazarov M. A. Early Moon, Mon, a.m., Salon A Nowicki A. W. Mars Future Missions Posters, Thu, p.m., Gym Nazarov M. A. Martian Meteorites, Thu, p.m., Salon C Nozaki J. Astrobiology Posters, Thu, p.m., Gym Nazzario R. C. Surprising Things Posters, Thu, p.m., Gym Nunes D. C* VeHs Geology/Geophysics, Tue, a.m., Salon A Nchodu M. R. Iron Meteorites Posters, Tue, p.m., Gym NuthJ. A. III* Asrwbiology, Wed, p.m., Salon B Neakrase L. D. V. Print Only: Mars Nuth J. A. III Astrobiology Posters, Thu, p.m., Gym Neal C. R* Early Moon, Mon, a.m., Salon A Nyquist L. E* Early Moon, Mon, a.m., Salon A Neal C. R. Planetary Formation, Tue, p.m., Salon C Nyquist L. E. Lunar Basalts, Wed, a.m., Salon A Neal C. R. Lunar Basalts Posters, Thu, p.m., Gym Nyquist L. E. Melted Meteorites, Thu, a.m., Marina Plaza Nealson K Odyssey Results, Tue, p.m., Salon B Oakman K. Mars Future Missions Posters, Thu, p.m., Gym Nealy J. E. Print Only: Moon Oberst J.* Early Moon, Mon, a.m., Salon A Nedachi M. Astrobiology Posters, Thu, p.m., Gym Oberst J. Borrelly and Eros, Wed, p.m., Salon C Nedachi Y. Astrobiology Posters, Thu, p.m., Gym Oberst J. Between Rock/Cold Place Posters, Thu, p.m., Gym Nee! C. R. Mars Oceans Posters, Thu, p.m., Gym ObotV. Education Posters, Tue, p.m., Gym Negoda A. A. Print Only: Moon O'Brien D. P. Surprising Things Posters, Thu, p.m., Gym Nehru C. E. Iron Meteorites Posters, Tue, p.m., Gym OckerK. D* Martian Meteorites, Thu, p.m., Salon C Nelman-Gonzalez M. A. Astrobiology, Wed, p.m., Salon B OdakaM. Mars Polar Terrain Posters, Thu, p.m., Gym Nelson D. M. Mars Oceans Posters, Thu, p.m., Gym OeK. Martian Meteorites Posters, Thu, p.m., Gym Nelson R. Ice Rocks Posters, Thu, p.m., Gym Ogliani F. Mars Landers Posters, Tue, p.m., Gym Nelson R. M. * Borrelly and Eros, Wed, p.m., Salon C O'GradyM. Presolar Grains II, Wed, p.m., Marina Plaza NelsonR. M. Small Bodies, Thu, p.m., Salon A Ohashi H. IDPs!Micrometeorites Posters, Tue, p.m., Gym NelsonR. M. Surprising Things Posters, Thu, p.m., Gym Ohba Y. Between Rock/Cold Place Posters, Thu, p.m., Gym NelsonS. V. Education Posters, Tue, p.m., Gym Ohman T. Mars Geology Posters, Tue, p.m., Gym Nemeth 1. Future Missions Posters, Thu, p.m., Gym Ohman T. Cratered Earth Posters, Tue, p.m., Gym Nemtchinov I. V. Mars Craters Posters, Thu, p.m., Gym Ohman T. Mars Craters Posters, Thu, p.m., Gym Ness N. F. Mars Magnetics/Mercury, Wed, p.m., Salon A Ohman T. Print Only: Craters Nettles J. W. Chondrites Posters, Tue, p.m., Gym OhmotoH. Astrobiology Posters, Thu, p.m., Gym

160 33rd LPSC Program Index OhnoS. Cratering Processes Posters, Tue, p.m., Gym PellinM. J. Presolar Grains I, Wed, a.m., Marina Plaza Ohsumi K. 0.* IDPs/Micrometeorites, Man, p.m., Marina Plaza PellinM. 1. Presolar Grains II, Wed, p.m., Marina Plaza OhtakeM. Lunar Remote Sensing Posters, Tue, p.m., Gym Perelygin V. P. Print Only: Meteorites Ohtani E. Ordinary Chondrites, Man, p.m., Salon C Pesonen L. Chondrites Posters, Tue, p.m., Gym Ohyama Y. Between Rock/Cold Place Posters, Thu, p.m., Gym Pesonen L. Cratered Earth Posters, Tue, p.m., Gym Okazaki R. Martian Meteorites Posters, Thu, p.m., Gym Pesonen L. Print Only: Craters O'Keefe J. D* Cratering Processes, Tue, a.m., Salon C Pestaj T. Early Solar System, Man, a.m., Marina Plaza Okubo C. H.* Mars Tectonics, Wed, a.m., Salon C Peterson C. Education Posters, Tue, p.m., Gym Omelchenko V. Print Only: Moon Peterson C. A. · Lunar Remote Sensing Posters, Tue, p.m., Gym Onishi K. Lunar Basalts Posters, Tbu, p.m., Gym Peterson P. E. Venus/Mercury Posters, Tue, p.m., Gym OriG. G. Mars Landers Posters, Tue, p.m., Gym Petit 1-M. Small Bodies, Tbu, p.m., Salon A OriG. G. Planetary Formation Posters, Tue, p.m., Gym Petro N. E. Lunar Remote Sensing Posters, Tue, p.m., Gym OriG.G. Astrobiology Posters, Thu, p.m., Gym Petrov D. V. Print Only: Moon Orlando T. M. Martian Surface Posters, Tue, p.m., Gym Petruny L. W. Surprising Things Posters, Thu, p.m., Gym Ormol Cratered Earth Posters, Tue, p.m., Gym Pettengill G. H. Print Only: Venus Orofino V. Mars Landers Posters, Tue, p.m., Gym Peulvast 1-P. Mars Geology Posters, Tue, p.m., Gym OseteM. Chondrites Posters, Tue, p.m., Gym Peulvast J-P. Martian Gullies, Thu, a.m., Salon B OshtrakhM. I. Print Only: Meteorites Phelps A. W. Pushing Technical Frontiers Posters, Tue, p.m., Osinski G. R. * Cratered Earth, Man, a.m., Salon C Gym Osinski G. R. Cratered Earth Posters, Tue, p.m., Gym Phillips C. Io Posters, Thu, p.m., Gym Osinski G. R. Cratering Processes Posters, Tue, p.m., Gym Phillips E. L. Martian Gullies, Tbu, a.m., Salon B Ostro S. J.* Small Bodies, Thu, p.m., Salon A Phillips R. J. Mars Volcanism, Mon, a.m., Salon B Ostro S. J. Surprising Things Posters, Thu, p.m., Gym Phillips R. J. Venus Geology/Geophysics, Tue, a.m., Salon A Ostro S. J. Print Only: Outer Solar System Phillips R. J. Mars History, Tbu, a.m., Salon C O'Sullivan D. Print Only: Meteorites Phillips R. J. Astrobiology Posters, Thu, p.m., Gym OtsukiM. Lunar Impacts Posters, Tue, p.m., Gym Phoreman J. Mars Aeolian Posters, Thu, p.m., Gym OttU. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Piatek J. L. * Small Bodies, Tbu, p.m., Salon A OttU. Martian Meteorites Posters, Thu, p.m., Gym Piatek J. L. Surprising Things Posters, Thu, p.m., Gym OttU. Isotopes Posters, Tbu, p.m., Gym Pierazzo E.* Cratering Processes, Tue, a.m., Salon C OwenT. Borrelly and Eros, Wed, p.m., Salon C Pierazzo E. Planetary Formation, Tue, p.m., Salon C OzawaK. Planetary Formation, Tue, p.m., Salon C Pierce H. A. Cratered Earth Posters, Tue, p.m., Gym Pace K. Mars Volcanism Posters, Tue, p.m., Gym Pierce T. L. Mars Geology, Man, p.m., Salon B Pack A.* Refractory Inclusions, Tbu, p.m., Marina Plaza Pieters C. M. * Lunar Regolith, Tue, p.m., Salon A Paige D. A. Mars Volcanism Posters, Tue, p.m., Gym Pieters C. M. Lunar Remote Sensing Posters, Tue, p.m., Gym Paige D. A. Martian Poles, Wed, a.m., Salon B Pieters C. M. Lunar Regolith Posters, Tue, p.m., Gym Paige D. A.* Martian Gullies, Thu, a.m., Salon B Pieters C. M: Martian Surface Posters, Tue, p.m., Gym Paillou P. Mars Landers Posters, Tue, p.m., Gym Pieters C. M. Lunar Basalts, Wed, a.m., Salon A Palchik N. A. Print Only: Craters Pieters C. M. Small Bodies, Tbu, p.m., Salon A Palme H.* Chondrules/Solar System, Tue, a.m., Marina Plaza Pieters C. M. Surprising Things Posters, Thu, p.m., Gym Palme H. Refractory Inclusions, Tbu, p.m., Marina Plaza Pikil'ner L. Odyssey Results, Tue, p.m., Salon B Palmer D. M. Cratering Processes Posters, Tue, p.m., Gym Pilkington M. Cratered Earth Posters, Tue, p.m., Gym Palmero A. Lunar Basalts Posters, Thu, p.m., Gym Fillinger C. T. Carbonaceous Chondrites Posters, Tue, p.m., Gym Palmero A.* Mars Rowing Ice, Fri, a.m., Salon B Fillinger C. T. Isotopes Posters, Thu, p:m., Gym Papanastassiou D. A. Early Solar System, Man, a.m., Marina Plaza Pitiss S. E. Mars Aeolian Posters, Thu, p.m., Gym Papanastassiou D. A. Lunar Cratering, Mon, p.m., Salon A Pizzarello S* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Papanastassiou D. A* Ordinary Chondrites, Mon, p.m., Salon C Pizzarello S. Organic Material Posters, Tue, p.m., Gym Papike J. J. Early Moon, Mon, a.m., Salon A Plaut J. J. Odyssey Results, Tue, p.m., Salon B -Papike J. J. Planetary Formation Posters, Tue, p.m., Gym Plaut 1. J. Mars Furure Missions Posters, Thu, p.m., Gym Papike J. J. Martian Meteorites Posters, Thu, p.m., Gym Plescia J. B.* Mars Volcanism, Man, a.m., Salon B Papike J. J. Lunar Basalts Posters, Thu, p.m., Gym Plescia 1. B. Cratered Earth Posters, Tue, p.m., Gym Papike J. J. Print Only: Moon Poag C. W* Cratering Processes, Tue, a.m., Salon C Papike J. J. Print Only: Astrobiology Podosek F. A. Early Solar System, Man, a.m., Marina Plaza . Pappalardo R. * Europa's Icy ShelL Thu, a.m., Salon A Podosek F. A. Chronology Posters, Tue, p.m., Gym Pappalardo R. T. Io Burns, Thu, p.m., Salon B Podosek F. A. Presolar Grains I, Wed, a.m., Marina Plaza Pappalardo R. T. Three Icy Moons Posters, Thu, p.m., Gym Polf J. Mars Data Posters, Tue, p.m., Gym Pargamin J. Clash of Titans Posters, Thu, p.m., Gym PolitA. T. Venus/Mercury Posters, Tue, p.m., Gym Pargamin J. Three Icy Moons Posters, Tbu, p.m., Gym Pollak A. Dust Devils, Fri, a.m., Salon C Parkl Martian Meteorites Posters, Thu, p.m., Gym Ponganis K. V. Iron Meteorites Posters, Tue, p.m., Gym Parker T. J. Mars Landers Posters, Tue, p.m., Gym Popov Yu. Odyssey Results, Tue, p.m., Salon B Parker T. J. Martian Gullies, Thu, a.m., Salon B Poulet F. Surprising Things Posters, Thu, p.m., Gym ParkerT. J* Mars Rowing Ice, Fri, a.m., Salon B Pounders E. Mars Tectonics Posters, Thu, p.m., Gym Parmentier E. M* Mars History, Thu, a.m., Salon C Povenmire H. Print Only: Meteorites Parnell J. Print Only: Astrobiology Povenmire H. R. Print Only: Comets Patchen A. Lunar Regolith, Tue, p.m., Salon A Povenmire K. I. Print Only: Meteorites Patchen A. Lunar Regolith Posters, Tue, p.m., Gym Powars D. S. Cratering Processes, Tue, a.m., Salon C Patchen A. Lunar Impacts Posters, Tue, p.m., Gym Powars D. S. Cratered Earth Posters, Tue, p.m., Gym Patchen A. Martian Meteorites, Thu, p.m., Salon C PrattS. Mars Volcanism, Man, a.m., Salon B Patel M. R. Mars Landers Posters, Tue, p.m., Gym PrattS. Mars Polar Terrain Posters, Thu, p.m., Gym Pathare A. V* Martian Poles, Wed, a.m., Salon B Pravdivtseva 0. V. * Early Solar System, Mon, a.m., Marina Plaza Patterson G. W* Europa's Icy Shell, Thu, a.m., Salon A Pravdivtseva 0. V. Chronology Posters, Tue, p.m., Gym Patzer A. Achondrites Posters, Thu, p.m., Gym Pravdivtseva 0. V. Presolar Grains II, Wed, p.m., Marina Plaza Peacock K. Mars Future Missions Posters, Thu, p.m., Gym Preble P. Furure Missions Posters, Tbu, p.m., Gym Pearl 1. C. Io Burns, Thu, p.m., Salon B Presley M. A. 'Print Only: Mars Pearson V. K. Organic Material Posters, Tue, p.m., Gym Preston R. A. Print Only: Future Missions Pearson V. K. Astrobiology Posters, Thu, p.m., Gym Prettyman T. H.* Lunar Regolith, Tue, p.m., Salon A Peek K. Ice Rocks Posters, Thu, p.m., Gym Prettyman T. H. Odyssey Results, Tue, p.m., Salon B Peitersen M. N. Mars Volcanism Posters, Tue, p.m., Gym Prettyman T. H. Lunar Remote Sensing Posters, Tue, p.m., Gym Pelkey S.M. Mars Landers Posters, Tue, p.m., Gym Prettyman T. H. Lunar Basalts, Wed, a.m., Salon A Pelkey S.M. Mars Remote Sensing Posters, Thu, p.m., Gym Prettyman T. H. Mars Future Missions Posters, Thu, p.m., Gym Pelletier S. P. Venus/Mercury Posters, Tue, p.m., Gym Prettyman T. P. Odyssey Results, Tue, p.m., Salon B

33rd LPSC Program Index ______161 Prewitt C. T. Carbonaceous Chondrites Posters, Tue, p.m., Gym Rivoallan A. Martian Surface Posters, Tue, p.m., Gym Prieto 0. Three Icy Moons Posters, Thu, p.m., Gym Roark J. H. Mars Geology Posters, Tue, p.m., Gym Pritchard M. E. Venus/Mercury Posters, Tue, p.m., Gym Roatsch T. Mars Data Posters, Tue, p.m., Gym ProbstL. W* Astrobiology, Wed, p.m., Salon B Robert F. Early Solar System, Man, a.m., Marina Plaza Prockter L. M. * Io Burns, Thu, p.m., Salon B Robert F. IDPs/Micrometeorites, Mon, p.m., Marina Plaza Prockter L. M. Between Rock/Cold Place Posters, Thu, p.m., Gym Robert F. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Prockter L. M. Three Icy Moons Posters, Thu, p.m., Gym Robert F. Chondrites Posters, Tue, p.m., Gym PonA. Print Only: Astrobiology Robertson J. D. Cratering Processes Posters, Tue, p.m., Gym Purucker M. * Mars Magnetics/Mercury, Wed, p.m., Salon A Robertson S. Surprising TI!ings Posters, Thu, p.m., Gym Poskas z. Education Posters, Tue, p.m., Gym Robinson G. A. Carbonaceous Chondrites, Tue, p.m., Marina Plaza QuinnR. Martian Surface Posters, Tue, p.m., Gym Robinson M. S. Lunar Regolith, Tue, p.m., Salon A QuinnR. C. Mars Future Missions Posters, Thu, p.m., Gym Robinson M. S. Lunar Remote Sensing Posters, Tue, p.m., Gym Quirico E. Chondrites Posters, Tue, p.m., Gym Robinson M. S. Venus/Mercury Posters, Tue, p.m., Gym Radebaugh J. * Io Burns, Thu, p.m., Salon B Robinson M. S. Education Posters, Tue, p.m, Gym Radebaugh J. Io Posters, Thu, p.m., Gym Robinson M. S. Between Rock/Cold Place Posters, Thu, p.m., Gym Rafeek S. Future Missions Posters, Thu, p.m., Gym Robinson M. S. Mars Future Missions Posters, Thu, p.m., Gym Rages K. Mars Landers Posters, Tue, p.m., Gym Rochette P. Chondrites Posters, Tue, p.m, Gym Raitala J. Mars Geology Posters, Tue, p.m., Gym Rochette P. Mars Geophysics Posters, Thu, p.m, Gym Raitala J. Venus/Mercury Posters, Tue, p.m., Gym Roddy D. J. Cratered Earth Posters, Tue, p.m., Gym Raitala J. Cratered Earth Posters, Tue, p.m., Gym RodenJ. Future Missions Posters, Thu, p.m., Gym Raitala J. Mars Craters Posters, Thu, p.ni., Gym Rodriguez S. Planetary Formation Posters, Tue, p.m., Gym Raitala J. Print Only: Craters Rogers D.* Mars Infrared Spectroscopy, Tue, a.m., Salon B RajmonD. Cratering Processes Posters, Tue, p.m., Gym Rogers J. R. Astrobiology Posters, Thu, p.m, Gym Rama Murthy V. Planetary Formation, Tue, p.m.. Salon C RogersN. W. Print Only: Meteorites Ramezani J. Early Solar System, Mon, a.m., Marina Plaza Rokugawa S. Lunar Basalts Posters, Thu, p.m, Gym RaoM. N. Martian Meteorites Posters, Thu, p.m., Gym Romanek C. S. Martian Surface Posters, Tue, p.m., Gym Rappaport N. Clash of Titans Posters, Thu, p.m., Gym Romanek C. S. ALH 84001, Fri, a.m., Marina Plaza Ratcliff J. T. Lunar Geophysics Posters, Tue, p.m., Gym Romeo K. Mars Future Missions Posters, Thu, p.m., Gym Rathbun J. A.* Io Burns, Thu, p.m., Salon B Romstedt J. Future Missions Posters, Thu, p.m, Gym RaymanM. D. Borrelly and Eros, Wed, p.m., Salon C Roncoli R. Mars Landers Posters, Tue, p.m., Gym Raymond C. A. Mars Tectonics, Wed, a.m., Salon C Rosiek M. R. Lunar Remote Sensing Posters, Tue, p.m., Gym Raymond C. A. Mars Geophysics Posters, Thu, p.m., Gym Rosk6F. Future Missions Posters, Thu, p.m, Gym Raynal P-1. Chondrites Posters, Tue, p.m., Gym Rossi A. P. Cratered Earth Posters, Tue, p.m, Gym Rea J. Mars Future Missions Posters, Thu, p.m., Gym Rossi A. P.* Dust Devils, Fri, a.m, Salon C Rebetez M. Print Only: Meteorites RostD. Carbonaceous Chondrites, Tue, p.m, Marina Plaza Redding B. Venus/Mercury Posters, Tue, p.m., Gym Rotenberg E.* Early Solar System, Mon, a.m., Marina Plaza Reedy C. Odyssey Results, Tue, p.m., Salon B Rotenberg E. Chondrites Posters, Tue, p.m., Gym Reedy J. R. Mars Remote Sensing Posters, Thu, p.m., Gym Roth L. E. Origins Posters, Thu, p.m., Gym Reedy R. C. Iron Meteorites Posters, Tue, p.m., Gym Roush T. Mars Future Missions Posters, Thu, p.m., Gym Reedy R. C. Lunar Regolith Posters, Tue, p.m., Gym Roush T. L. Mars Remote Sensing Posters, Thu, p.m., Gym Reedy R. C. Lunar Basalts, Wed, a.m., Salon A Roush T. R. Clash of Titans Posters, Thu; p.m., Gym Reedy R. C. Borrelly and Eros, Wed, p.m., Salon C Rouzaud J.-N. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Reese C. C. Venus/Mercury Posters, Tue, p.m., Gym Rowland S. K. Mars Volcanism Posters, Tue, p.m, Gym Reese Y. Early Moon, Mon, a.m., Salon A RubinA. E.* Ordinary Chondrites, Mon, p.m., Salon C Reese Y. Melted Meteorites, Thu, a.m., Marina Plaza RubinA. E. Chondrules/Solar System, Tue, a.m, Marina Plaza Rehkamper M. Early Solar System, Mon, a.m., Marina Plaza RubinA. E. Refractory Inclusions, Thu, p.m, Marina Plaza Reid A.M. Cratering Processes Posters, Tue, p.m., Gym Rudant J-P. Cratered Earth Posters, Tue, p.m, Gym Reimold W. U. Chondrites Posters, Tue, p.m., Gym Rudoy A. N. Planetary Formation Posters, Tue, p.m., Gym Reimold W. U. Cratered Earth Posters, Tue, p.m., Gym Riiedenauer F. Future Missions Posters, Thu, p.m., Gym Reindler L. Mars History, Thu, a.in., Salon C RuffS. W. Mars Landers Posters, Tue, p.m, Gym Reinen L.A. Venus/Mercury Posters, Tue, p.m., Gym Ruffle G. Mars Landers Posters, Tue, p.m., Gym Reisberg L. Early Solar System, Mon, a.m., Marina Plaza RuizJ. Planetary Formation Posters, Tue, p.m, Gym Reisenfeld D. B* Borrelly and Eros, Wed, p.m., Salon-e Ruiz J. Print Only: Outer Solar System Reiss D.* Martian Gullies, Thu, a.m., Salon B RushmerT* Ordinary Chondrites, Mon, p.m, Salon C Reiss D. Mars Oceans Posters, Thu, p.m., Gym RushmerT. · Chondrites Posters, Tue, p.m., Gym Reiss D. Mars Flowing Ice, Fri, a.m., Salon B Russell A. J. Martian Gullies, Thu, a.m., Salon B Reme H. Mars Magnetics/Mercury, Wed, p.m., Salon A Russell P. Mars Oceans Posters, Thu, p.m., Gym Rey Bacaicoa V. Future Missions Posters, Thu, p.m., Gym Russell P.* Mars Flowing Ice, Fri, a.m., Salon B Ricco A. J. Mars Future Missions Posters, Thu, p.m., Gym RussellS. S. Refractory Inclusions, Thu, p.m., Marina Plaza Rice J. W. Jr* Martian Gullies, Thu, a.m., Salon B Rutherford M. J. Martian Meteorites, Thu, p.m., Salon C Richards M. A. Early Moon, Mon, a.m., Salon A Ruzicka A* Ordinary Chondrites, Mon, p.m., Salon C Richards M. A. Venus Geology/Geophysics, Tue, a.m., Salon A RyanJ. G. Cratered Earth Posters, Tue, p.m., Gym Richards M. A. Mars History, Thu, a.m., Salon C Ryder G. Lunar Impacts Posters, Tue, p.m, Gym Richardson M. Mars Future Missions Posters, Thu, p.m., Gym Sabaka T. J. Mars Magnetics/Mercury, Wed, p.m., Salon A Richardson M. I. Dust Devils, Fri, a.m., Salon C Safonova E. N. Lunar Impacts Posters, Tue, p.m., Gym Richmond N. C.* Lunar Regolith, Tue, p.m., Salon A Sagnotti L. Chondrites Posters, Tue, p.m., Gym Richmond N. C. Mars Magnetics/Mercury, Wed, p.m., Salon A Sahijpal S. Print Only: Meteorites Richmond N.C. Mars Geophysics Posters, Thu, p.m., Gym Saiki K. Lunar Remote Sensing Posters, Tue, p.m., Gym Richter F. M. * Refractory Inclusions, Thu, p.m., Marina Plaza Saiki T. Lunar Impacts Posters, Tue, p.m., Gym Riedel S. J* Mars Volcanism, Mon, a.m., Salon B Sakimoto S. E. H.* Mars Volcanism, Mon, a.m, Salon B RiedlerW. Future Missions Posters, Thu, p.m., Gym Sakimoto S. E. H. Mars Geology Posters, Tue, p.m., Gym Rietmeijer F. J. M. * lOPs/Micrometeorites, Mon, p.m., Marina Plaza Sakimoto S. E. H. Mars Volcanism Posters, Tue, p.m., Gym Righter K. Planetary Formation, Tue, p.m., Salon C Sakimoto S. E. H. Mars Craters Posters, Thu, p.m., Gym Righter K.* Lunar Basalts, Wed, a.m., Salon A Sakimoto S. E. H. Dust Devils, Fri, a.m., Salon C RileeM. Future Missions Posters, Thu, p.m., Gym Salisbury J. W. Mars Infrared Spectroscopy, Tue, a.m., Salon B Riman F. Print Only: Mars Sams C. Astrobiology, Wed, p.m., Salon B Ringrose T. J. Mars Aeolian Posters, Thu, p.m., Gym Sandel B. R. Borrelly and Eros, Wed, p.m., Salon C Rivers M. CAis, AOAs, Dis Posters, Thu, p.m., Gym Sanin A. Odyssey Results, Tue, p.m, Salon B Rivkin A. S. Small Bodies, Thu, p.m., Salon A Sanin A. Mars Remote Sensing Posters, Thu, p.m, Gym Rivkin A. S. Surprising TI!ings Posters, Thu, p.m., Gym San'koN. Odyssey Results, Tue, p.m., Salon B

162 33rd LPSC Program Index SanoY. Lunar Impacts Posters, Tue, p.m., Gym Sharp T. Mars Future Missions Posters, Thu, p.m., Gym Sarid A. R.* Europa's Icy Shell, Thu, a.m., Salon A Sharpton V. L. Cratered Earth Posters, Tue, p.m., Gym Sarid A. R. Three Icy Moons Posters, Thu, p.m., Gym Sharpton V. L. Mars Aeolian Posters, Thu, p.m., Gym Sarneczky K. Surprising Things Posters, Thu, p.m., Gym Sharpton V. L. Print Only: Astrobiology Sasaki S. IDPs!Micrometeorites Posters, Tue, p.m., Gym Shcherbakov R. Mars History, Thu, a.m., Salon C Sasaki S. Surprising Things Posters, Thu, p.m., Gym Shearer C. K. * Early Moon, Man, a.m., Salon A Sasaki S. Mars Flowing Ice, Fri, a.m., Salon B Shearer C. K. Planetary Formation Posters, Tue, p.m., Gym Saunders R. S. Odyssey Results, Tue, p.m., Salon B Shearer C. K. Martian Meteorites, Thu, p.m., Salon C Saunders R. S. Mars Remote Sensing Posters, Thu, p.m., Gym Shearer C. K. Martian Meteorites Posters, Thu, p.m., Gym Sautter V. Martian Meteorites Posters, Thu, p.m., Gym Shearer C. K. Lunar Basalts Posters, Thu, p.m., Gym Sautter V. Mars Geophysics Posters, Thu, p.m., Gym Shearer C. K. Dust Devils, Fri, a.m., Salon C SavinaM. R* Presolar Grains I, Wed, a.m., Marina Plaza Shearer C. K. Print Only: Moon Sazonova L. V. Print Only: Craters Shearer C. K. Print Only: Astrobiology Schaefer E. Mars Future Missions Posters, Thu, p.m., Gym Shepard M. K. Mars Data Posters, Tue, p.m., Gym Schafer A. Cratered Earth Posters, Tue, p.m., Gym Shepard M. K. Mars Landers Posters, Tue, p.m., Gym Scheible R. T. Print Only: Astrobiology Sherman D. M. Education Posters, Tue, p.m., Gym SchenkP.M* Europa's Icy Shell, Thu, a.m., Salon A Sherman J. Mars Future Missions Posters, Thu, p.m., Gym SchenkP. M. Io Burns, Thu, p.m., Salon B Shervais J. W * Early Moon, Man, a.m., Salon A SchenkP. M. Three Icy Moons Posters, Thu, p.m., Gym SherwoodR. Future Missions Posters, Tbu, p.m., Gym Schenk P.M. Io Posters, Thu, p.m., Gym Shestopalov D. I. Print Only: Comets Scherler D. Cratering Processes, Tue, a.m., Salon C Shih C-Y* Early Moon, Man, a.m., Salon A Schieber J* Astrobiology, Wed, p.m., Salon B ShihC-Y. Melted Meteorites, Tbu, a.m., Marina Plaza Schieber J. Mars Future Missions Posters, Thu, p.m., Gym Shingareva T. V. Print Only: Comets Schmidt K. G.* Europa's Icy Shell, Thu, a.m., Salon A Shinohara C. Odyssey Results, Tue, p.m., Salon B Schnetzler C. Dust Devils, Fri, a.m., Salon C Shirley J. Io Burns, Tbu, p.m., Salon B Schofield P. F. Martian Meteorites Posters, Thu, p.m., Gym Shkuratov Yu. G. Lunar Regolith Posters, Tue, p.m., Gym Schofield T. Mars Landers Posters, Tue, p.m., Gym Shkuratov Yu. G. Print Only: Moon Scholl A. Martian Meteorites Posters, Thu, p.m., Gym Shock E. L. Europa's Icy Shell, Tbu, a.m., Salon A Scholl H. Print Only: Planetary Formation Shoemaker C. S. Cratered Earth Posters, Tue, p.m., Gym Scholten F. Mars Data Posters, Tue, p.m., Gym Showman A. P. Europa's Icy Shell, Thu, a.m., Salon A SchOnbiichler M. * Early Solar System, Mon, a.m., Marina Plaza Shnkolyukov A.* Cratered Earth, Mon, a.m., Salon C Schoonen M. A. A. Martian Surface Posters, Tue, p.m., Gym Shuvalov V. V. Cratering Processes Posters, Tue, p.m., Gym Schott B.* Mars History, Thu, a.m., Salon C Shvetsov V. Odyssey Results, Tue, p.m., Salon B Schubert M. Astrobiology Posters, Thu, p.m., Gym Shvetsov V. Mars Remote Sensing Posters, Tbu, p.m., Gym Schultz P. H* Cratering Processes, Tue, a.m., Salon C Sicardy B. Ice Rocks Posters, Tbu, p.m., Gym Schultz P. H. Lunar Regolith, Tue, p.m., Salon A Sickafoose A. A. Surprising Things Posters, Tbu, p.m., Gym Schultz P. H. Cratering Processes Posters, Tue, p.m., Gym Sidorov Yu. I. Print Only: Outer Solar System Schultz P. H. Mars Remote Sensing, Wed, p.m., Marina Plaza SiekmanM. Future Missions Posters, Tbu, p.m., Gym Schultz P. H* Dust Devils, Fri, a.m., Salon C Sierhuis M. Mars Data Posters, Tue, p.m., Gym Schultz R. A* Mars Tectonics, Wed, a.m., Salon C Sigurdsson F. Martian Gullies, Tbu, a.m., Salon B Schultz R. A. Mars Tectonics Posters, Thu, p.m., Gym Sik A. Education Posters, .Tue, p.m., Gym Schwandt C. Planetary Formation, Tue, p.m., Salon C Sik A. Print Only: Education Schwandt C. Martian Meteorites, Thu, p.m., Salon C Silverglate P. Mars Future Missions Posters, Tbu, p.m., Gym Schwandt C. S. ALH 84001, Fri, a.m., Marina Plaza Silverman S. Odyssey Results, Tue, p.m., Salon B Schwartz J. M. Achondrites Posters, Thu, p.m., Gym SimmonsJ. Education Posters, Tue, p.m., Gym Schwartz J. M. Print Only: Moon SimonS. CAis, AOAs, Dis Posters, Tbu, p.m., Gym Schwenzer S. P. Martian Meteorites Posters, Thu, p.m., Gym SimonS. B. Early Solar System. Mon, a.m., Marina Plaza Scott E. R. D. Ordinary Chondrites, Man, p.m., Salon C SimonS. B.* Refractory Inclusions, Thu, p.m., Marina Plaza Scott E. R. D.* Chondrules/Solar Systeru, Tue, a.m., Marina Plaza Simon T. Print Only: Education Scott E. R. D. Melted Meteorites, Thu, a.m., Marina Plaza Simonelli D. Io Burns, Thu, p.m., Salon B Scott R. S. Lunar Geophysics Posters, Tue, p.m., Gym Simons M. Venus/Mercury Posters, Tue, p.m., Gym Sears D. W. G. Martian Surface .Posters, Tue, p.m., Gym Simonson B. M. * Cratered Earth, Mon, a.m., Salon C Sears D. W. G. Borrelly and Eros, Wed, p.m., Salon C Simonson B. M. Cratering Processes Posters, Tue, p.m., Gym Sears D. W. G. Surprising Things Posters, Thu, p.m., Gym Simpson R. A. Mars Data Posters, Tue, p.m., Gym Sears D. W. G. Future Missions Posters, Thu, p.m., Gym Simpson R. A. Mars Landers Posters, Tue, p.m., Gym See T. H. Cratered Earth, Mon, a.m., Salon C Singletary S. J.* Melted Meteorites, Tbu, a.m., Marina Plaza Seelos F. P. IV Mars Geology, Mon, p.m., Salon B Sipiera P. P. Achondrites Posters, Tbu, p.m., Gym Seelos F. P. IV Mars Landers Posters, Tue, p.m., Gym Sisterson J. M. Iron Meteorites Posters, Tue, p.m., Gym Segura M. Io Burns, Thu, p.m., Salon B Sitko M. L. Planetary Formation, Tue, p.m., Salon C Segura T. L* Dust Devils, Fri, a.m., Salon C Sivtzov A. I. Lunar Basalts Posters, Thu, p.m., Gym SELENE Working Group Lunar Remote Sensing Posters, Tue, p.m., Gym Skilling I. P.* Martian Gullies, Tbu, a.m., Salon B Semjonova L. F. Isotopes Posters, Thu, p.m., Gym Skinner J. A. Martian Gullies, Tbu, a.m., Salon B SengerR. IDPs!Micrometeorites Posters, Tue, p.m., Gym Skinner J. A. Jr.* Mars Geology, Mon, p.m., Salon B Sephton M. A. Organic Material Posters, Tue, p.m., Gym SladeM. A. Mars Landers Posters, Tue, p.m., Gym Sephton M. A. Isotopes Posters, Thu, p.m., Gym SladeM. A. Venus/Mercury Posters, Tue, p.m., Gym Sephton M. A. Astrobiology Posters, Thu, p.m., Gym SladeM. A. Small Bodies, Tbu, p.m., Salon A Sergeev A. V. Print Only: Outer Solar System Slater V. P. * Ordinary Chondrites, Mon, p.m., Salon C SeuR. Mars Landers Posters, Tue, p.m., Gym Slavney S. Mars Data Posters, Tue, p.m., Gym Sever K. M. Print Only: Outer Solar System Smit J. Cratered Earth, Mon, a.m., Salon C Shandera S. E. Print Only: Craters Smith A. D. Martian Meteorites Posters, Thu, p.m., Gym Shannon D. M. ALH 84001, Fri, a.m., Marina Plaza Smith D. E. Mars Magnetics/Mercury, Wed, p.m., Salon A Shapkin A. I. Print Only: Outer Solar System Smith D. E. Borrelly and Eros, Wed, p.m., Salon C Shappirio M. Borrelly and Eros, Wed, p.m., Salon C Smith D. E. Mars Remote Sensing, Wed, p.m., Marina Plaza ShappirioM. Future Missions Posters, Thu, p.m., Gym Smith D. E.* Mars History, Tbu, a.m., Salon C Sharkov E. V. Planetary Formation Posters, Tue, p.m., Gym Smith D. E. Mars Remote Sensing Posters, Tbu, p.m., Gym Sharma S. K. Mars Future Missions Posters, Thu, p.m., Gym Smith G. A. Lunar Basalts, Wed, a.m., Salon A Sharp T. Early Solar Systeru, Man, a.m., Marina Plaza Smith G. A. Lunar Basalts Posters, Thu, p.m., Gym Sharp T. Ordinary Chondrites, Man, p.m., Salon C Smith J. B. Chondrules/Solar Systeru, Tue, a.m., Marina Plaza Sharp T. Carbonaceous Chondrites Posters, Tue, p.m., Gym Smith J. B. Isotopes Posters, Tbu, p.m., Gym Sharp T. Martian Surface Posters, Tue, p.m., Gym Smith M. Odyssey Results, Tue, p.m., Salon B

33rd LPSC Program Index ______l63 SmithM. Mars Future Missions Posters. Thu, p.m., Gym SternS. A. Borrelly and Eros, Wed, p.m., Salon C SmithM. D. Mars Remote Sensing Posters, Thu, p.m., Gym Steutel D.* Lunar Regolith, Tue, p.m., Salon A Smith P. H. Mars Landers Posters, Tue, p.m., Gym Stewart B. W. Future Missions Posters, Thu, p.m., Gym SmithS. ALH 84001, Fri, a.m., Marina Plaza Stewart R. H. Cratered Earth Posters, Tue, p.m., Gym Smrekar S. E* Mars Tectonics, Wed, a.m., Salon C Stiltner S. A. Lunar Basalts Posters, Thu, p.m., Gym Smrekar S. E. Mars Geophysics Posters, Thu, p.m., Gym StimpflM* Melted Meteorites, Thu, a.m., Marina Plaza SmytheW. D. Small Bodies, Thu, p.m., Salon A Stocco K. Education Posters, Tue, p.m., Gym SmytheW. D. Io Burns, Thu, p.m., Salon B Stockstill K. R. * Martian Meteorites, Thu, p.m., Salon C Smythe W. D. Surprising Things Posters, Thu, p.m., Gym Stoddard P. R. Venus/Mercury Posters, Tue, p.m., Gym SmytheW. D. Io Posters, Thu, p.m., Gym Stoddard P. R. Io Posters, Thu, p.m., Gym Snider N. 0. Mars Geology, Mon, p.m., Salon B Stofan E. R. Mars Volcanism, Mon, a.m., Salon B Snider N. 0. Mars Landers Posters, Tue, p.m., Gym Stofan E. R. Venus/Mercury Posters, Tue, p.m., Gym Snook K. J* Mars Infrared Spectroscopy, Tue, a.m., Salon B Stofan E. R. Mars Geophysics Posters, Thu, p.m., Gym Snow C. A. Early Moon, Mon, a.m., Salon A Stofan E. R. Print Only: Venus Snyder D. Mars Volcanism Rosters, Tue, p.m., Gym Sttiffler D. Cratered Earth, Mon, a.m., Salon C Socki R. A. Martian Surface Posters, Tue, p.m., Gym Sttiffler D.* Cratering Processes, Tue, a.m., Salon C Soderblom L. A.* Martian Poles, Wed, a.m., Salon B StofflerD. Martian Meteorites Posters. Thu, p.m., Gym Soderblom L. A.* Borrelly and Eros, Wed, p.m., Salon C Stoker C. R. Mars Landers Posters, Tue, p.m., Gym Soderblom L. A. Between Rock/Cold Place Posters, Thu, p.m., Gym Stolper E. M. Ordinary Chondrites, Mon, p.m., Salon C Soderblom L. A. Mars Polar Terrain Posters, Thu, p.m., Gym Stooke P. J. Ice Rocks Posters, 'Thu, p.m., Gym Solomatov V. S. Venus/Mercury Posters, Tue, p.m., Gym Stough T. Future Missions Posters, Thu, p.m., Gym Solomatov V. S. Planetary Formation Posters, Tue, p.m., Gym StraitM.M. Chondrites Posters, Tue, p.m., Gym SolomonS. C. Venus Geology/Geophysics, Tue, a.m., Salon A Straughn A. Surprising Things Posters, Thu, p.m., Gym Solomon S. C. Venus/Mercury Posters, Tue, p.m., Gym StroudR. M.* Presolar Grains II, Wed, p.m., Marina Plaza SolomonS. C* Mars History, Thu, a.m., Salon C Sugihara T. Lunar Remote Sensing Posters, Tue, p.m., Gym Solomon S. C. Three Icy Moons Posters, Thu, p.m., Gym Sugita S. Cratering Processes Posters, Tue, p.m., Gym Sartin C. Ice Rocks Posters, Thu, p.m., Gym Sugiura N. Chronology Posters, Tue, p.m., Gym SotinC* Mars History, Thu, a.m., Salon C SullivanR. J. Between Rock/Cold Place Posters, Thu, p.m., Gym Solin C. Clash of Titans Posters, Thu, p.m., Gym Sullivan R. J. * Dust Devils, Fri, a.m., Salon C Solin C. Three Icy Moons Posters, Thu, p.m., Gym Sumner D. Cratered Earth, Mon, a.m., Salon C Southam G. Astrobiology, Wed, p.m., Salon B Sumners C. Education Posters, Tue, p.m., Gym SpaunN. A.* Europa's Icy Shell, Thu, a.m., Salon A Sun X. Mars Remote Sensing, Wed, p.m., Marina Plaza Speck A. K.* Presolar Grains I, Wed, a.m., Marina Plaza Sunshine J. M.* Small Bodies, Thu, p.m., Salon A Speck A. K.* Origins, Fri, a.m., Salon A Sunshine J. M. Between Rock/Cold Place Posters, Thu, p.m., Gym Spencer J. R* Io Burns, Thu, p.m., Salon B Surkov A. V. Astrobiology Posters, Thu, p.m., Gym Spencer J. Io Posters, Thu, p.m., Gym Sutter B. Martian Surface Posters, Tue, p.m., Gym Speyerer E. J. Education Posters, Tue, p.m., Gym Sutter B. Mars Future Missions Posters, Thu, p.m., Gym SpildeM. N. Print Only: Moon SuttonS. R. Presolar Grains II, Wed, p.m., Marina Plaza SpildeM. N. Print Only: Astrobiology SuttonS. R. Martian Meteorites Posters, Thu, p.m., Gym Spitale J. N. Cratering Processes Posters, Tue, p.m., Gym SuttonS. R. CAis, AOAs, Dis Posters, Thu, p.m., Gym SpohrR. Print Only: Meteorites SuttonS. R. ALH 84001, Fri, a.m., Marina Plaza Spray J. G. Cratered Earth, Mon, a.m., Salon C SuttonS. R. Print Only: Meteorites Spray J. G. Lunar Impacts Posters, Tue, p.m, Gym Suzuki A. Print Only: Meteorites Spray J. G. Cratering Processes Posters, Tue, p.m., Gym SvedhemH. IDPs/Micrometeorites Posters, Tue, p.m., Gym Sprenke K. F. Print Only: Mars Svetsov V. V. Print Only: Astrobiology Spudis P. D* Lunar Regolith, Tue, p.m., Salon A Swindle T. D. Lunar Impacts Posters, Tue, p.m., Gym Spudis P. D. Lunar Remote Sensing Posters, Tue, p.m., Gym Szabo Saki L. Education Posters, Tue, p.m., Gym Spudis P. D. Lunar Impacts Posters, Tue, p.m., Gym Szakmany Gy. Education Posters, Tue, p.m., Gym Spudis P. D. Lunar Basalts, Wed, a.m., Salon A Szathmary E. Mars Polar Terrain Posters, Thu, p.m., Gym Spudis P. D. Lunar Basalts Posters, Thu, p.m., Gym Szathmiiry E. Print Only: Mars Squyres S. W. Odyssey Results, Tue, p.m., Salon B Szentpetery L. Future Missions Posters, Thu, p.m., Gym Squyres S. W. Mars Landers Posters, Tue, p.m., Gym Tachibana S. * Chondrules/Solar System, Tue, a.m., Marina Plaza Squyres S. W. Mars Data Posters, Tue, p.m., Gym Tajika E. Mars Polar Terrain Posters, ·Thu, p.m., Gym Squyres S. W. Education Posters, Tue, p.m., Gym Takata T. Lunar Basalts Posters, Thu, p.m., Gym Squyres S. W. Borrelly and Eros, Wed, p.m., Salon C TakedaH* Early Moon, Mon, a.m., Salon A Squyres S. W. Mars Future Missions Posters, Thu, p.m., Gym Takeda H. Lunar Remote Sensing Posters, Tue, p.m., Gym Srinivasan G.* Melted Meteorites, Thu, a.m., Marina Plaza Takeda H. Melted Meteorites, Thu, a.m., Marina Plaza Sriwatanapongse W. Martian Surface Posters, Tue, p.m., Gym Takeda H. Print Only: Meteorites Stadermann F. J. IDPs/Micrometeorites Posters, Tue, p.m., Gym Tamppari L. K. Io Burns, Thu, p.m., Salon B S tadermann F. J. Presolar Grains I, Wed, a.m., Marina Plaza Tanaka K. L. Mars Geology, Mon, p.m., Salon B Stadermann F. J* Presolar Grains II, Wed, p.m., Marina Plaza Tanaka K. L. Mars Landers Posters, Tue, p.m., Gym StaidM. I. Mars Infrared Spectroscopy, Tue, a.m., Salon B Tanaka K. L. Martian Poles, Wed, a.m., Salon B StaidM. 1.* Lunar Basalts, Wed, a.m., Salon A Tanaka K. L. * Martian Gullies, Thu, a.m., Salon B StaidM.I. Mars Remote Sensing Posters, Thu, p.m., Gym Tanaka K. L. Mars Polar Terrain Posters, Thu, p.m., Gym Stankevich D. G. Lunar Regolith Posters, Tue, p.m., Gym Tanaka K. L. Future Missions Posters, Thu, p.m., Gym Stankevich D. G. Print Only: Moon Tanaka K. L. Mars Flowing Ice, Fri, a.m., Salon B Starke V. Astrobiology Posters, Thu, p.m., Gym Taranik J. V. Martian Surface Posters, Tue, p.m., Gym Starr R. Odyssey Results, Tue, p.m., Salon B Tate A. Mars Tectonics, Wed, a.m., Salon C Starr R. D.* Borrelly and Eros, Wed, p.m., Salon C Tate A. Mars Tectonics Posters, Thu, p.m., Gym Starukhina L. V* Venus Geology/Geophysics, Tue, a.m., Salon A TaylorD-H. Lunar Regolith, Tue, p.m., Salon A Starukhina L. V. Lunar Regolith Posters, Tue, p.m., Gym Taylor G. J. Pushing Technical Frontiers Posters, Tue, p.m., Steele A. Astrobiology, Wed, p.m., Salon B Gym Stegman D. R. * Early Moon, Mon, a.m., Salon A Taylor G. J. Lunar Remote Sensing Posters, Tue, p.m., Gym Stehlik H. Print Only: Craters Taylor G. J. Planetary Formation Posters, Tue, p.m., Gym Steinberg J. E. Future Missions Posters, Thu, p.m., Gym Taylor G. J. Lunar Basalts, Wed, a.m., Salon A Steinberg J. T. Borrelly and Eros, Wed, p.m., Salon C Taylor G. J. Melted Meteorites, Thu, a.m., Marina Plaza Stempel M. M. Three Icy Moons Posters, Thu, p.m., Gym Taylor G. J. Lunar Basalts Posters, Thu, p.m., Gym Stephan T* IDPs/Micrometeorites, Mon, p.m., Marina Plaza Taylor K. Mars Volcanism, Mon, a.m., Salon B Stephan T. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Taylor K. Mars Volcanism Posters, Tue, p.m., Gym Stepinski T. F.* Mars Flowing Ice, Fri, a.m., Salon B Taylor L. A.* Lunar Regolith, Tue, p.m., Salon A

164 33rd LPSC Program Index Taylor L.A. Carbonaceous Chondrites Posters, Tue, p.m., Gym Treiman A. H. Achondrites Posters, Thu, p.m., Gym Taylor L.A. Lunar Regolith Posters, Tue, p.m., Gym Treiman A. H.* ALH 84001, Fri, a.m., Marina Plaza Taylor L.A. Lunar Impacts Posters, Tue, p.m., Gym Tret' yakov V. Odyssey Results, Tue, p.m., Salon B Taylor L.A. Lunar Basalts, Wed, a.m., Salon A Trionfetti G. Lunar Regolith Posters, Tue, p.m., Gym Taylor L.A. Martian Meteorites, Thu, p.m., Salon C Tripa C. E* Presolar Grains I, Wed, a.m., Marina Plaza TaylorM.E. Future Missions Posters, Thu, p.m., Gym Tripathi A. B. Martian Surface Posters, Tue, p.m., Gym TaylorS.* IDPs/Micrometeorites, Mon, p.m., Marina Plaza Trombka J. I. Odyssey Results, Tue, p.m., Salon B Tejero R. Print Only: Outer Solar System Trombka J. I.* Borrelly and Eros, Wed, p.m., Salon C Telouk P. Planetary Formation, Tue, p.m., Salon C Trowbridge K. Mars Future Missions Posters, Thu, p.m., Gym Tennison E. Mars Future Missions Posters, Thu, p.m., Gym Troy R. F. Mars Polar Terrain Posters, Thu, p.m., Gym Tepliczky I. Surprising Things Posters, Thu, p.m., Gym Trueba A. Martian Surface Posters, Tue, p.m., Gym Tera F. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Truszkowski W. Future Missions Posters, Thu, p.m., Gym Terada H. Between Rock/Cold Place Posters, Thu, p.m., Gym Tsapin A. I. Mars Future Missions Posters, Thu, p.m., Gym Terada K. Lunar Regolith, Tue, p.m., Salon A Tsikalas F. Cratered Earth Posters, Tue, p.m., Gym Terada K. Lunar Impacts Posters, Tue, p.m., Gym Tsikalas F. Cratering Processes Posters, Tue, p.m, Gym The L-S. Presolar Grains I, Wed, a.m., Marina Plaza Tsuboi N. Lunar Remote Sensing Posters, Tue, p.m., Gym TheL-S. Origins, Fri, a.m., Salon A Tsygan A. Mars Remote Sensing Posters, Thu, p.m., Gym ThenoT. W.* Lunar Basalts, Wed, a.m., Salon A Tuckwell G. W. Venus/Mercury Posters, Tue, p.m., Gym Therkelsen J.P. Cratered Earth, Man, a.m., Salon C Tufts B. R. Europa's Icy Shell, Thu, a.m., Salon A Therkelsen J. P. Mars Oceans Posters, Thu, p.m., Gym Tufts B. R. Three Icy Moons Posters, Thu, p.m., Gym Thiernens M. H. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Tunyil. Origins Posters, Thu, p.m., Gym Thiernens M. H. Organic Material Posters, Tue, p.m., Gym Turcotte D. L. * Mars History, Thu, a.m., Salon C Thiemens M. H. Mars Future Missions Posters, Thu, p.m., Gym Turk K. Organic Material Posters, Tue, p.m., Gym Thomas C. Three Icy Moons Posters, Thu, p.m., Gym Turner G. Lunar Basalts Posters, Thu, p.m., Gym Thomas N. Mars Data Posters, Tue, p.m., Gym Turtle E. P. Martian Poles, Wed, a.m., Salon B ThomasN. Borrelly and Eros, Wed, p.m., Salon C Turtle E. P. * Europa's Icy Shell, Thu, a.m., Salon A ThomasN. Mars Future Missions Posters, Thu, p.m., Gym Turtle E. P* Io Burns, Thu, p.m., Salon B Thomas P. C. Between Rock/Cold Place Posters, Thu, p.m., Gym Turtle E. P. Io Posters, Thu, p.m., Gym Thomas-Keprta K. L. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Tyler G. L. Mars Data Posters, Tue, p.m., Gym Thomas-Keprta K. L. Astrobiology, Wed, p.m., Salon B Ueda Y* Small Bodies, Thu, p.m., Salon A Thomas-Keprta K. L. Martian Meteorites Posters, Thu, p.m., Gym Ueda Y. Surprising Things Posters, Thu, p.m., Gym Thomas-Keprta K. L. Astrobiology Posters, Thu, p.m., Gym UllmannJ. Iron Meteorites Posters, Tue, p.m., Gym Thomas-Keprta K. L* ALH 84001, Fri, a.m., Marina Plaza Ulyanov A. A. Early Solar System, Man, a.m., Marina Plaza ThompsonJ. Borrelly and Eros, Wed, p.m., Salon C Ulyanov A. A. Refractory Inclusions, Thu, p.m., Marina Plaza Thompson K. T. Future Missions Posters, Thu, p.m., Gym Unger Z. Education Posters, Tue, p.m., Gym ThompsonP. Mars Future Missions Posters, Thu, p.m., Gym Urdiales M. Cratering Processes Posters, Tue, p.m., Gym Thompson P. B. Education Posters, Tue, p.m., Gym Urquhart M. L. Education Posters, Tue, p.m., Gym Thompson T. W. Mars Future Missions Posters, Thu, p.m., Gym Urquhart M. L. Mars Oceans Posters, Thu, p.m., Gym Thomson B. J* Mars Remote Sensing, Wed, p.m., Marina Plaza Ushikubo T. CAis, AOAs, Dis Posters, Thu, p.m., Gym Thornton J. M. Mars Future Missions Posters, Thu, p.m., Gym Ustinova G. K. Print Only.: Meteorites Thorsos I. E. Mars Landers Posters, Tue, p.m., Gym Ustinova G. K. Print Only: Origins Thorsos I. E. Mars Craters Posters, Thu, p.m., Gym Usuda T. Between Rock/Cold Place Posters, Thu, p.m., Gym Thorsteinsson T. Martian Gullies, Thu, a.m., Salon B Vaisnys A. Mars Future Missions Posters, Thu, p.m., Gym TirukoM. Origins Posters, Thu, p.m., Gym Valderrama P. Education Posters, Tue, p.m., Gym Timosheuko G. Mars Remote Sensing Posters, Thu, p.m., Gym Valentine R. B. Mars Future Missions Posters, Thu, p.m., Gym Tiscareno M. S. Three Icy Moons Posters, Thu, p.m., Gym ValiH. ALH 84001, Fri, a.m., Marina Plaza Titus T. N. Mars Infrared Spectroscopy, Tue, a.m., Salon B Valter A. A. Print Only: Craters Titus T. N.* Martian Poles, Wed, a.m., Salon B van den Berg A. P. Mars History, Thu, a.m., Salon C Titus T. N. Mars Remote Sensing Posters, Thu, p.m., Gym van der Bogert C. H.* Lunar Regolith, Tue, p.m., Salon A Tobie G. Three Icy Moons Posters, Thu, p.m., Gym van Gasselt S* Mars Geology, Man, p.m., Salon B Tobola K. Education Posters, Tue, p.m., Gym van Gasselt S. Mars Geology Posters, Tue, p.m., Gym ToigoA. D. Dust Devils, Fri, a.m., Salon C van Gasselt S. Mars Data Posters, Tue, p.m., Gym Tokar R. L. * Odyssey Results, Tue, p.m., Salon B van Gasselt S. Mars Oceans Posters, Thu, p.m., Gym Tokunaga A. Between Rock/Cold Place Posters, Thu, p.m., Gym Van Kranendouk M. Astrobiology, Wed, p.m., Salon B Toloba E. Planetary Formation Posters, Tue, p.m., Gym van Westrenen W* Planetary Formation, Tue, p.m., Salon C TolsonR. Odyssey Results, Tue, p.m., Salon B VanimanD.* Lunar Basalts, Wed, a.m., Salon A Tomilina T. Odyssey Results, Tue, p.m., Salon B Vaniman D. T. Mars Remote Sensing, Wed, p.m., Marina Plaza TomitaN. Print Only: Meteorites Vanzani V. Print Only: Planetary Formation Tompkins S. * Lunar Basalts, Wed, a.m., Salon A Varekamp J. C. Astrobiology Posters, Thu, p.m., Gym Tonchev A. Odyssey Results, Tue, p.m., Salon B VarelaM.E. Melted Meteorites, Thu, a.m., Marina Plaza Tonui E. K.* Carbonaceous Chondrites, Tue, p.m., Marina Plaza Varela M. E. CAis, AOAs, Dis Posters, Thu, p.m., Gym TonuiE. K. Carbonaceous Chondrites Posters, Tue, p.m., Gym Varga T. Education Posters, Tue, p.m., Gym Toan O. B. Dust Devils, Fri, a.m., Salon C Varghese P. L. Io Posters, Thu, p.m., Gym Toporski J. * Astrobiology, Wed, p.m., Salon B Varqes E. S.* Astrobiology, Wed, p.m., Salon B Toppani A.* IDPs/Microrneteorites, Man, p.m., Marina Plaza Vater P. Print Only: Meteorites Torkar K. Future Missions Posters, Thu, p.m., Gym Vaughan R. G. Martian Surface Posters, Tue, p.m., Gym Tornabene L. T. Cratered Earth Posters, Tue, p.m., Gym Veeder G. J. Io Burns, Thu, p.m., Salon B Tasca N.J. Martian Surface Posters, Tue, p.m., Gym VelbelM. A. Carbonaceous Chondrites Posters, Tue, p.m., Gym TossmanB. Mars Future Missions Posters, Thu, p.m., Gym Velikodsky Yu. I. Print Only: Moon T6th Sz. Future Missions Posters, Thu, p.m., Gym Venable R. J. Cratering Processes Posters, Tue, p.m., Gym Totonchy M. B. Io Posters, Thu, p.m., Gym V enance K. E. Chondrites Posters, Tue, p.m., Gym Townend B. Education Posters, Tue, p.m., Gym Verchovsky A. B. Isotopes Posters, Thu, p.m., Gym TownerM. Mars Data Posters, Tue, p.m., Gym Verevkin T. Odyssey Results, Tue, p.m., Salon B TownerM. C. Mars Aeolian Posters, Thu, p.m., Gym Veverka J. Education Posters, Tue, p.m., Gym TownerM. C. Mars Future Missions Posters, Thu, p.m., Gym Veverka J. Between Rock/Cold Place Posters, Thu, p.m., Gym Trainor T. Martian Meteorites Posters, Thu, p.m., Gym Vicker D. Mars Future Missions Posters, Thu, p.m., Gym Travis L. D. Io Burns, Thu, p.m., Salon B Vid'macheuko A. P. Print Only: Outer Solar System Treiman A. H. Mars Geology Posters, Tue, p.m., Gym Vid'macheuko A. P. Print Only: Origins Treiman A. H. Education Posters, Tue, p.m., Gym Vilas F. Between Rock/Cold Place Posters, Thu, p.m., Gym Treiman A. H. Martian Meteorites, Thu, p.m., Salon C Vilas F. Ice Rocks Posters, Thu, p.m., Gym

33rd LPSC Program lndex ______165 Vincendon C. Mars Geology Posters, Tue, p.m., Gym White B. R. Mars Aeolian Posters. Thu, p.m., Gym Vinogradova T. Mars Data Posters, Tue, p.m., Gym WhitleyV. H. Mars Data Posters, Tue, p.m., Gym Vishnevsky S. A. Print Only: Craters Whittemore-Smith G. Education Posters, Tue, p.m., Gym Vogel N. Chondrites Posters, Tue, p.m., Gym Whittet D. C. B. Lunar Regolith, Tue, p.m, Salon A Voorhies C. V * Mars Magnetics/Mercury, Wed, p.m., Salon A Whittet D. C. B. Lunar Impacts Posters, Tue, p.m., Gym Vors E. Martian Surface Posters, Tue, p.m., Gym Whittington A. G. Origins, Fri, a.m., Salon A Vuong D. Print Only: Mars Wieczorek M. A.* Early Moon, Man, a.m., Salon A WadeS. Cratered Earth Posters, Tue, p.m., Gym Wieczorek M. A. Lunar Remote Sensing Posters, Tue, p.m., Gym WadhwaM* ALH 84001, Fri, a.m., Marina Plaza Wieczorek M. A. Mars Geophysics Posters, Thu, p.m, Gym WagnerR. J. Lunar Remote Sensing Posters, Tue, p.m., Gym WielerR. Chondrites Posters, Tue, p.m., Gym WagnerR. 1. Venus/Mercury Posters, Tue, p.m., Gym Wieler R. Lunar Regolith Posters, Tue, p.m., Gym WlihlischM. Mars Data Posters, Tue, p.m., Gym Wieler R. Isotopes Posters, Thu, p.m., Gym Waldron A.M. Mars Future Missions Posters, Thu, p.m., Gym WielerR. Origins, Fri, a.m., Salon A Walker D* Planetary Formation, Tue, p.m., Salon C Wiens R. C. Martian Surface Posters, Tue, p.m., Gym Walker D. Print Only: Meteorites Wiens R. C. Borrelly and Eros, Wed, p.m., Salon C Walker R. 1. Early Solar System, Man, a.m., Marina Plaza Wiens R. C. Mars Future Missions Posters, Thu, p.m., Gym Walker R. 1* Martian Meteorites, Thu, p.m., Salon C WiensR. C. Future Missions Posters, Thu, p.m., Gym WalkerR. M. IDPs/Micrometeorites, Mon, p.m, Marina Plaza Wiesmann H. Early Moon, Mon, a.m., Salon A Wang A. Martian Surface Posters, Tue, p.m., Gym WiesmannH. Melted Meteorites, Thu, a.m., Marina Plaza Wang A. Mars Landers Posters, Tue, p.m., Gym Wilbur K. E.* Dust Devils, Fri, a.m., Salon C Wang A. Mars Future Missions Posters, Thu, p.m., Gym Wilcox B. Between Rock/Cold Place Posters, Thu, p.m., Gym Wang A. Print Only: Moon Wilcox J. Z. Astrobiology Posters, Thu, p.m., Gym WangH-N. Print Only: Meteorites Wilkins S. 1* Mars Tectonics, Wed, a.m., Salon C Wang 1. Borrelly and Eros, Wed, p.m., Salon C Wilkison S. L. Venus/Mercury Posters, Tue, p.m., Gym Wang M-S. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Willcockson W. Mars Future Missions Posters, Thu, p.m., Gym Wang R-C. Print Only: Meteorites Williams D. A* Io Burns, Thu, p.m., Salon B Wanke H. Odyssey Results, Tue, p.m., Salon B Williams}. G. Lunar Geophysics Posters, Tue, p.m., Gym Wanke H. Martian Meteorites Posters, Thu, p.m., Gym William.' 1-P. Mars Volcanism Posters, Tue, p.m., Gym WardA. W. Dust Devils, Fri, a.m., Salon C Williams K. K. Cratered Earth Posters, Tue, p.m., Gym Ward 1. Mars Remote Sensing Posters, Thu, p.m., Gym Williams K. K. Future Missions Posters, ,Thu, p.m, Gym Ward W.R. Origins, Fri, a.m, Salon A Williams R. M. E.* Martian Gullies, Thu, a.m, Salon B WardW.R. Print Only: Origins Williams S. H.* Dust Devils, Fri, a.m., Salon C Warmflash D. Astrobiology Posters, Thu, p.m., Gym Wilson G. R. Mars Aeolian Posters, Thu, p.m, Gym WarnerN. H. Mars Volcanism Posters, Tue, p.m., Gym Wilson1. W. Print Only: Moon WarnerN. H. Planetary Formation Posters, Tue, p.m., Gym Wilson L.* Mars Volcanism, Man, a.m, Salon B WarrenP. H* Melted Meteorites, Thu, a.m, Marina Plaza Wilson L. Lunar Geophysics Posters, Tue, p.m., Gym Wasserburg G. 1. Early Solar System, Man, a.m., Marina Plaza Wilson L. Mars Volcanism Posters, Tue, p.m, Gym Wasserburg G. 1. Lunar Cratering, Man, p.m, Salon A · Wilson L. Melted Meteorites, Thu, a.m., Marina Plaza Wasserburg G. 1. Ordinary Chondrites, Man, p.m., Salon C WilsonR..R. Io Posters, Thu, p.m., Gym Wasserburg G. J. Presolar Grains I, Wed, a.m., Marina Plaza WilsonS. Dust Devils, Fri, a.m., Salon C Wasserman A. A. Cratering Processes Posters, Tue, p.m, Gym Wilson T. L. Print Only: Mars Wasson1. T.* Chondrules/Solar System, Tue, a.m., Marina Plaza WinterM. E. Lunar Regolith, Tue, p.m., Salon A Wasson J. T. Refractory Inclusions, Thu, p.m., Marina Plaza WirickS. IDPs/Micrometeorites, Man, p.m., Marina Plaza Waters L. B. F. M. Origins, Fri, a.m., Salon A WirthR. Martian Surface Posters, Tue, p.m., Gym WattK. Education Posters, Tue, p.m., Gym Withers P. Mars Data Posters, Tue, p.m, Gym WattL. Venus Geology/Geophysics, Tue, a.m., Salon A Withers P. Mars Aeolian Posters, Thu, p.m., Gym Watters T. R. Lunar Remote Sensing Posters, Tue, p.m., Gym Wlotzka F. Lunar Impacts Posters, Tue, p.m., Gym Watters T. R. Venus/Mercury Posters, Tue, p.m., Gym Wlotzka F. Lunar Basalts, Wed, a.m., Salon A Watters T. R* Mars Tectonics, Wed, a.m., Salon C Wlotzka F. Lunar Basalts Posters, Thu, p.m., Gym Watters T. R. Mars Tectonics Posters, Thu, p.m., Gym WolfU. Lunar Remote Sensing Posters, Tue, p.m., Gym WebbB.M* Mars Tectonics, Wed, a.m., Salon C WolfU. Mars Volcanism Posters, Tue, p.m., Gym WebbB.M. Mars Tectonics Posters, Thu, p.m., Gym WolfU. Venus/Mercury Posters, Tue, p.m., Gym W eidenschilling S. J. Mars Geophysics Posters, Thu, p.m., Gym WolfU. Lunar Basalts, Wed, a.m., Salon A Weidenschilling S. 1* Origins, Fri, a.m., Salon A WolffM. 1. Mars Remote Sensing, Wed, p.m., Marina Plaza Weinreb S. Print Only: Future Missions Woncik P. 1. Mars Data Posters, Tue, p.m, Gym Weisberg M. K. * Carbonaceous Chondrites, Tue, p.m., Marina Plaza WoodA.R. Lunar Basalts Posters, Thu, p.m, Gym Weisberg M. K. CA!s, AOAs, Dis Posters, Thu, p.m., Gym WoodS. A. Chondrules/Solar System, Tue, a.m., Marina Plaza Weiss B. P. ALH 84001, Fri, a.m., Marina Plaza Wooten 1. Education Posters, Tue, p.m, Gym Weitz C. Mars Data Posters, Tue, p.m., Gym Wright I. P. IDPs/Micrometeorites Posters, Tue, p.m., Gym Weitz C. Mars Landers Posters, Tue, p.m., Gym Wright!. P. Isotopes Posters, Thu, p.m., Gym Weitz C. Mars Future Missions Posters, Thu, p.m., Gym Wright!. P. Future Missions Posters, Thu, p.m, Gym Welten K. C. Chondrites Posters, Tue, p.m., Gym Wiinnemann K. Cratering Processes Posters, Tue, p.m., Gym Welten K. C. Achondrites Posters, Thu, p.m., Gym WyattM.B* Mars Infrared Spectroscopy, Tue, a.m., Salon B Wenker A. Martian Gullies, Thu, a.m., Salon B WyattM. B. Mars Remote Sensing Posters, Thu, p.m., Gym Wentworth S. 1. Lunar Regolith, Tue, p.m., Salon A XieZ.* Ordinary Chondrites, Mon, p.m., Salon C Wentworth S. 1. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Xiong Y.-L* Chondrules/Solar System, Tue, a.m, Marina Plaza Wentworth S. 1. Astrobiology, Wed, p.m., Salon B Xirouchakis D. Planetary Formation Posters, Tue, p.m., Gym Wentworth S. 1. Martian Meteorites Posters, Thu, p.m., Gym Yakovlev 0. I. Lunar Impacts Posters, Tue, p.m., Gym Wentworth S. 1. Astrobiology Posters, Thu, p.m., Gym Yakovlev 0. I. Lunar Basalts, Wed, a.m., Salon A Wentworth S. J. ALH 84001, Fri, a.m., Marina Plaza Yakshinskiy B. V. Lunar Regolith Posters, Tue, p.m., Gym Wernecke A. Mars Geology Posters, Tue, p.m., Gym Yamaguchi A. Achondrites Posters, Thu, p.m., Gym Wessen R. Mars Future Missions Posters, Thu, p.m., Gym Yamaguchi Y. Lunar Basalts Posters, Thu, p.m., Gym West K. Education Posters, Tue, p.m., Gym Yarnashi ta K. Planetary Formation, Tue, p.m., Salon C Westall F. Mars Infrared Spectroscopy, Tue, a.m., Salon B Yanai K. Martian Meteorites Posters, Thu, p.m., Gym Westall F.* Astrobiology, Wed, p.m., Salon B Yano H. IDPs/Micrometeorites Posters, Tue, p.m. Gym Westall F. Astrobiology Posters, Thu, p.m., Gym YelleR. V. Borrelly and Eros, Wed, p.m., Salon C Wetteland C. Carbonaceous Chondrites Posters, Tue, p.m., Gym Yen A. Mars Future Missions Posters, Thu, p.m., Gym WewelF. Mars Data Posters, Tue, p.m., Gym Yen A. S.* Mars Remote Sensing, Wed, p.m., Marina Plaza WeylandM.* ALH 84001, Fri, a.m, Marina Plaza YinQ.Z* Planetary Formation, Tue, p.m. Salon C Whitby 1. A* Melted Meteorites, Thu, a.m., Marina Plaza YinQ-Z. IDPs/Micrometeorites Posters, Tue, p.m., Gym

166 33rd LPSC Program Index YinQ-Z. Mars History, Thu, a.m., Salon C ZentA. P. Mars Future Missions Posters, Thu, p.m., Gym Yingst R. A. Mars Landers Posters, Tue, p.m, Gym Zetocha P. Future Missions Posters, Thu, p.m., Gym Yingst R. A. Lunar Basalts, Wed, a.m., Salon A Zhang F-S. Print Only: Meteorites Yokohata T. Mars Polar Terrain Posters, Thu, p.m., Gym Zhang J. lo Posters, Thu, p.m., Gym Yoshikawa K Mars Geology Posters, Tue, p.m, Gym Zhang Q. Io Posters, Thu, p.m., Gym Y oshitake M* Refractory Inclusions, Thu, p.m., Marina Plaza Zhang W-L. Print Only: Meteorites Young D. Borrelly and Eros, Wed, p.m., Salon C Zhong S. J* Mars Magnetics/Mercury, Wed, p.m., Salon A Young D. A* Venus Geology/Geophysics, Tue, a.m., Salon A Zhugin Y. N. Print Only: Craters Young D. A Venus/Mercury Posters, Tue, p.m., Gym ZiegM. J. Pushing Technical Frontiers Posters, Tue, p.m., YoungE. D. Refractory Inclusions, Thu, p.m, Marina Plaza Gym YuchtD. Future Missions Posters, Thu, p.m, Gym Zimbelman J. R. Mars Volcanism Posters, Tue, p.m., Gym YuenD. A. Mars History, Thu, a.m, Salon C Zimbelman J. R* Dust Devils, Fri, a.m., Salon C Yung K L. Mars Landers Posters, Tue, p.m., Gym Zimmermann L. IDPs/Micrometeorites, Mon, p.m., Marina Plaza YurimotoH. Carbonaceous Chondrites Posters, Tue, p.m., Gym ZinnerE* Early Solar System, Man, a.m., Marina Plaza Yurimoto H. Refractory Inclusions, Thu, p.m, Marina Plaza Zinner E. Carbonaceous Chondrites, Tue, p.m., Marina Plaza Zahnle K. Dust Devils, Fri, a.m, Salon C Zinner E.* Presolar Grains I, Wed, a.m, Marina Plaza Zanda B* Chondrules/Solar System, Tue, a.m., Marina Plaza Zinner E. Pre solar Grains II, Wed, p.m., Marina Plaza Zanda B. Carbonaceous Chondrites Posters, Tue, p.m., Gym Zipfel J. Martian Meteorites Posters, Thu, p.m, Gym Zanda B. ·Chondrites Posters, Tue, p.m., Gym Zolensky M. E. Cratered Earth, Mon, a.m., Salon C Zaranek S. E* Mars History, Thu, a.m., Salon C Zolensky M. E. IDPs!Micrometeorites, Mon, p.m., Marina Plaza Zarnecki J. Mars Data Posters, Tue, p.m., Gym Zolensky M. E. Carbonaceous Chondrites, Tue, p.m, Marina Plaza Zarnecki J. C. Mars Landers Posters, Tue, p.m., Gym Zolensky M. E. Carbonaceous Chondrites Posters, Tue, p.m., Gym Zarnecki J. C. Mars Aeolian Posters, Thu, p.m, Gym Zolensky M. E* Borrelly and Eros, Wed, p.m., Salon C ZartmanR. Melted Meteorites, Thu, a.m, Marina Plaza Zolensky M. E. Mars Future Missions Posters, Thu, p.m., Gym Zega T. J. Carbonaceous Chondrites Posters, Tue, p.m., Gym Zolotov M. Yu. Venus/Mercury Posters, Tue, p.m., Gym Zeigler R. A Lunar Regolith, Tue, p.m., Salon A Zolotov M. Yu* Europa's Icy Shell, Thu, a.m., Salon A Zeigler R. A Lunar Remote Sensing Posters, Tue, p.m, Gym ZuberM. T. Early Moon, Mon, a.m., Salon A Zeigler R. A Lunar Regolith Posters, Tue, p.m., Gym ZuberM. T. Venus Geology/Geophysics, Tue, a.m., Salon A Zeigler R. A Print Only: Moon ZuberM. T.* Mars Magnetics/Mercury, Wed, p.m., Salon A Zeitlin C. J. Odyssey Results, Tue, p.m., Salon B ZuberM. T. Borrelly and Eros, Wed, p.m., Salon C Zeitlin C. J. Print Only: Mars ZuberM. T. Mars Remote Sensing, Wed, p.m., Marina Plaza Zellner N. E. B. Lunar Regolith, Tue, p.m., Salon A ZuberM. T. Mars History, Thu, a.m., Salon C Zellner N. E. B. Lunar Impacts Posters, Tue, p.m., Gym ZuberM. T. Mars Geophysics Posters, Thu, p.m, Gym ZemaM. Achondrites Posters, Thu, p.m., Gym ZuberM. T. Mars Remote Sensing Posters, Thu, p.m., Gym ZentA. Martian Surface Posters, Tue, p.m., Gym ZurekR. W. Odyssey Results, Tue, p.m., Salon B Zent A. P* Martian Poles, Wed, a.m., Salon B ZychE. Print Only: Mars

33rd LPSC Program lndex 167