Monday, March 13, 1995 BASALTIC METEORITES: REAL AND VIRTUAL 8:30 a.m. Room A Chair(s): J. S. Delaney M. Sharma Delaney J. S.* 4 Vesta: A Thick-Skinned Parent for Basaltic Achondrites Palme H.* Chakraborty S. Trace Element Fractionation in Differentiated Planetesimals by Non-Equilibrium Partial Melting Jones J. H.* Mittlefehldt D. W. A Petrogenetic Classification for the Eucrite Clan--Partial Melts, Fractionated Liquids, Cumulates, and Oddities Pun A.* Papike J. J. Yamato Unequilibrated Eucrites Y-74450, Y-793548, Y-82210, Y-74159, and Y-75011: Pyroxene Trace Element Systematics Schwandt C. S.* Experimental Self-Diffusion Data for Orthopyroxene and its Significance for Meteorite Cooling Rates Yamaguchi A.* Taylor G. J. Takeda H. Keil K. Global Thermal Metamorphism on the Eucrite Parent Body Garrison D. H.* Bogard D. D. 39Ar-40Ar Age of Ibitira: Dating the Time of Chemical Equilibration of Eucritic Pyroxenes? Shukolyukov A.* Begemann F. Pu - Xe Dating of Eucrites Wadhwa M.* Lugmair G. W. Sm-Nd Systematics of the Eucrite Chervony Kut Sharma M.* Wasserburg G. J. Papanastassiou D. A. Quick J. E. Sharkov E. V. Laz'ko E. E. Extreme Sm-Nd Fractionation Due to Melting in the Oceanic Upper Mantle: Evidence From Polar Urals Ophiolites Lugmair G. W.* MacIsaac Ch. Radial Heterogeneity of 53Mn in the Early Solar System? Mikouchi T.* Miyamoto M. McKay G. A. Porphyritic Olivine in Angrite LEW87051: Cooling Rate and Evidence for Complex Crystallization History from Relict Cores and Zoning Profiles Love S. G.* Keil K. Mercurian Meteorites: Properties and Probabilities Monday, March 13, 1995 MARS EXPLORATION: PATHFINDER AND BEYOND 8:30 a.m. Room B Chair(s): J. D. Farmer Squyres S. W.* Carr M. H. Scientific Objectives for the Exploration of Mars Slade M. A.* Jurgens R. F. Mars Pathfinder Landing Site: Implications of Goldstone Radar CW and Ranging Observations Crowe D. G.* Smith P. H. Chabot N. Reynolds R. Tanner R. Doose L. Britt D. T. Singer R. Palmer J. Shinohara C. DeVries K. Friedman T. Calibration of the Imager for Mars Pathfinder (IMP) Smith P. H.* Britt D. T. Doose L. R. Singer R. B. Tomasko M. G. Gliem F. Greeley R. Sullivan R. Keller H. U. Knudsen J. M. Soderblom L. A. Update on the Imager for Mars Pathfinder (IMP) Farmer J. D.* Des Marais D. J. Greeley R. Exopaleontology at the Pathfinder Landing Site DesMarais D. J.* Carr M. H. Clark B. C. DeVincenzi D. L. Farmer J. D. Hayes J. M. Holland H. Kerridge J. F. Klein H. P. McDonald G. D. McKay C. P. Meyer M. A. Nealson K. H. Shock E. L. Ward D. M. Mars Exobiology: The Principles Behind the Plan for Exploration Monday, March 13, 1995 LUNAR EXPLORATION STRATEGIES AND RESOURCES 10:15 a.m. Room B Chair(s): D. Morrison Taylor G.* The Moon: Unsolved Problems and How to Solve Them Wilcox D. J.* Merry C. J. Site Selection for the Interlune-1 Mission Korotev R. L.* Haskin L. A. Jolliff B. L. A Simulated Geochemical Rover Mission to the Taurus Littrow Valley of the Moon Stacy N. J. S. Campbell D. B.* A Search for Ice at the Lunar Poles Allen C. C.* Morris R. V. McKay D. S. Oxygen Production from Lunar Soils Monday, March 13, 1995 ORIGINS OF PLANETARY SYSTEMS 8:30 a.m. Room C Chair(s): H. Newsom R. Malhotra Wetherill G. W.* The Formation and Habitability of Extra-Solar Planetary Systems Cameron A. G. W.* Time Scales in the Early Solar Nebula Boss A. P.* Thermal Profiles in Protoplanetary Disks Foster P. N.* Boss A. P. Triggering Collapse of the Presolar Cloud with Shock Waves Chambers J. E.* Wetherill G. W. Boss A. P. Dynamical Stability of Systems of Planetary Embryos Clayton D. D.* Jin L. Cosmic-Ray Extinct Radioactivity in Molecular Clouds Lauretta D. S.* Kremser D. T. Fegley B. Jr. Nickel Fractionation During Troilite Formation in the Solar Nebula Stepinski T. F.* Valagenas P. Global Evolution of Solids in Viscous Protoplanetary Disks Dominik C.* Tielens A. G. G. M. Mechanical Properties of Dust Aggregates Newsom H. E.* Metal-Silicate Fractionation in the Solar Nebula Ganguly J.* Bose K. Kinetics of Formation of Hydrous Phyllosilicates in the Solar Nebula Nagahara H.* Ozawa K. The Role of Hydrogen and Carbon in Evaporation of Forsterite in the Solar Nebula Mendybaev R. A.* Beckett J. R. Grossman L. Stolper E. Cooper R. F. Bradley J. P. Evaporation Rate of Silicon Carbide in Reducing Gases Monday, March 13, 1995 MERCURY 8:30 a.m. Room D Chair(s): M. Robinson Vilas F.* Future Exploration of Mercury Grard R.* Solar Photon Interaction with the Surface of the Planet Mercury Killen R. M.* Morgan T. H. Benkhoff J. OH in the Mercurian Exosphere as a Function of Polar Ice Cap Monday, March 13, 1995 REMOTE SENSING 9:15 a.m. Room D Chair(s): J. M. Sunshine D. L. Mitchell Campbell B. A.* Hawke B. R. Thompson T. W. Radar Studies of the Lunar Regolith Betts B. H.* Nash D. B. Infrared Reflectance Spectra of Selected Lunar Soils and Mineral Concentrates Calvin W. M.* King T. V. V. Spectral Characteristics of Fe-Phyllosilicates: Comparison to Murchison and Murray Wang A.* Haskin L. A. Jolliff B. L. Raman Spectroscopy as a Method for In-situ Lunar Mineralogical Remote Sensing Grobner C.* Oschutz F. Oberst J. Hiesinger H. Jaumann R. Neukum G. Photometric Analysis of Lunar Surfaces with Complex Topography Hapke B.* Nelson R. Smythe W. Horn L. Gharakanian V. Herrera P. Studies of the Opposition Effect and Negative Polarization with the JPL Photopolarimeters Urquhart M. L.* Jakosky B. M. Can We Use Remote Thermal Emission to Derive Lunar Surface Properties? Sunshine J. M.* Towards a More Sophisticated Approach to Compositional Interpretation of Silicate Absorptions in Asteroid Spectra Mitchell D. L.* Ostro S. J. Mineralogical Constraints from Asteroid Radar Observations McCord T. B.* Morris J. Persing D. Detection of Meteoroids Entering the Earth's Atmosphere Oehler A.* Hanowski N. DLR-Goniospectrophotometer Abundance Estimates from Bidirectional Reflectance Measurements in the UV, VIS and NIR Monday, March 13, 1995 SPECIAL PLENARY SESSION 1:30 p.m. Room C Chair(s): D. C. Black D. P. Blanchard Huntoon C.* Welcome Monday, March 13, 1995 1994 LPSC STUDENT PAPER AWARDS 1:30 p.m. Room C Chair(s): D. C. Black D. P. Blanchard James O.* Presentations to the GSA 1994 Stephen E. Dwornik Student Paper Award Winners Monday, March 13, 1995 HAROLD MASURSKY LECTURE SERIES PRESENTATION 1:30 p.m. Room C Chair(s): D. C. Black D. P. Blanchard Drake M. J.* The Moon: What We (Think We) Know About It, How We Know It, and What We Don't Know Monday, March 13, 1995 PRESOLAR GRAINS 2:30 p.m. Room A Chair(s): R. Lewis L. R. Nittler Daulton T. L.* Ozima M. Shukolyukov Y. Radiation-Induced Nano-Diamond Formation and Its Implications for Interstellar Diamonds Verchovsky A. B.* Pillinger C. T. On the Extraction of Nitrogen and Noble Gases from Presolar Diamonds by Pyrolysis Huss G. R.* Fahey A. J. Wasserburg G. J. Silicon and Carbon Isotopes in SiC from the Qingzhen (EH3) Chondrite Nittler L.* Amari S. Kehm K. Walker R. Zinner E. Lewis R. Continued Studies of Interstellar SiC Grains of Type X Hoppe P.* Strebel R. Pungitore B. Eberhardt P. Amari S. Lewis R. S. Interstellar SiC of Type X: How Many Distinct Stellar Sources? Amari S.* Zinner E. Lewis R. S. Woosley S. E. 44Ti in Interstellar Grains from the Murchison Meteorite Messenger S.* Amari S. Gao X. Walker R. M. Clemett S. J. Maechling C. R. Chen Y.-H. Zare R. N. Organic Molecules in Interstellar Graphite Grains. I. Clemett S. J.* Maechling C. R. Chen Y. -H. Zare R. N. Messenger S. Amari S. Gao X. Walker R. M. Lewis R. Organic Molecules in Interstellar Graphite Grains. II Bernatowicz T. J.* Gibbons P. C. Amari S. Lewis R. S. On the Nature of Carbon Cores in Interstellar Graphite Zinner E.* Amari S. Travaglio C. Gallino R. Busso M. Woosley S. The Isotopic Composition of Interstellar Graphite from the Murchison Meteorite: Evidence for Supernova Mixing Huss G. R. Fahey A. J.* Russell S. S. Wasserburg G. J. Oxygen Isotopes in Refractory Oxide Minerals from Primitive Chondrites Huss G. R.* Fahey A. J. Wasserburg G. J. Problems in the Nucleosynthesis of O, Mg, and Ti in an Al2O3 Grain from an AGB Star Monday, March 13, 1995 MARS SURFACE MINERALOGY AND REMOTE SENSING 2:30 p.m. Room B Chair(s): M. A. Presley B. J. Butler Reid R. J.* Singer R. B. Mineral Identification from Well-Calibrated Multispectral Imaging on the Surface of Mars Bell J. F. III* James P. B. Martin L. J. Clancy R. T. Lee S. W. Crisp D. Mars Surface Mineralogy from Hubble Space Telescope Multispectral Imaging: 1994 Pre-opposition Data Kirkland L.* Murchie S. Spectroscopic Evidence for Widespread Low-Albedo Ferric Minerals on the Tharsis Plateau Erard S.* Variability of Surface Materials in the Equatorial Regions of Mars Martin P.* Pinet P. Bacon R. Rousset A. Bellagh F. Surface Compositional Heterogeneities Related to the Martian Geomorphic Dichotomy Mustard J. F.* Are Dard Red Soils and Bright Dust on Mars Related Through Mineralogic Phase Changes? Morris R. V.* Why is Martian Soil Magnetic? Arnold G.* Bishop J. Schade U. Wasch R. Reflectance Spectroscopy of Palagonite, Aluminous Phyllosilicate, Glass and Ferric Oxide Mixtures: Implications for Surface Composition of Bright Martian Soil Bishop J. L.* Reflectance and Emittance Spectroscopy of Ferrihydrite-bearing and Ferric Sulfate-bearing Montmorillonites as Mars Soil Analogs Edgett K. S.* Christensen P. R Multispectral Thermal Infrared Observations of Sediments in Volcaniclastic Aeolian Dune Fields: Implications for the Mars Global Surveyor Thermal Emission Spectrometer Presley M. A.* Christensen P. R. Laboratory Measurements of Thermal Conductivity of Particulate Materials Under Martian Atmospheric Pressures Zent A. P.* Haberle R. M. Murphy J. R. Anomalous H2O Concentrations over Tharsis: Analysis of Equilibrium Models Butler B. J.* Martian 'Stealth(s)' Monday, March 13, 1995 SPECIAL SESSION: CLEMENTINE EXPLORES THE MOON 2:30 p.m. Room C Chair(s): G. J. Taylor L. R. Gaddis Nozette S.* The Clementine Mission Shoemaker E. M.* Robinson M. S. Clementine Observations of Melt Rocks and Volcanic Materials in the Schrodinger Basin McEwen A. S.* Robinson M. S. Duxbury T. C. Buratti B. J. Global Albedo Variations on the Moon: Clementine 750-NM Observations Lucey P. G.* Taylor G. J. Malaret E. Global Distribution of Iron on the Moon and Its Implications for the Magma Ocean, Crustal Structure and Lunar Origin Pieters C. M.* He G. Tompkins S. Staid M. I. Fischer E. M. The Low-Ti Basalts of Tsiolkovsky as Seen by Clementine McEwen A. S.* Shoemaker M. Zuber M. T. Smith D. E. Two Classes of Impact Basins on the Moon Spudis P. D.* Clementine Laser Altimetry and Multi-Ring Basins on the Moon Zuber M. T.* Smith D. E. Neumann G. A. Lemoine F. G. Gravity, Topography and the Geophysics of the Moon from the Clementine Mission Neumann G. A.* Zuber M. T. Lemoine F. G. Williams K. K. Crustal Structure of Large Impact Basins on the Moon Blamont J.* Lambert-Nebout C. Clementine: On-Board Image Compression Zook H. A. Potter A. E. Cooper B. L.* The Lunar Dust Exosphere and Clementine Lunar Horizon Glow Monday, March 13, 1995 OUTER PLANETS/SATELLITES 2:30 p.m. Room D Chair(s): H. F. Levison D. L. Blaney Malhotra R.* The Origin of Pluto's Peculiar Orbit Levison H. F.* Stern S. A. Kuiper Belt Object Encounters with the Pluto-Charon Binary: A Mechanism for Exciting Charon's Eccentricity Stern S. A.* Buie M. W. Trafton L. M. Flynn B. C. High-resolution HST Images of the Pluto-Charon System Roush T. L.* Cruikshank D. P. Pollack J. B. Young E. F. Bartholomew M. J. Near-Infrared Geometric Albedos of Charon and Pluto: Constraints on Charon's Surface Composition Pappalardo R.* Sullivan R. Rood D. Greeley R. Coon M. Crustal Separation on Europa: New Evidence and a Volcano-Tectonic Mechanism for Resurfacing Iaquinta-Ridolfi F.* Schenk P. Ejecta Deposits on the Icy Satellites: Deeper Insights into the Cratering Process Hogenboom D. L.* Kargel J. S. Holden T. C. Buyyounouski M. The Phase Diagram of Ammonia Monohydrate: A New High-Pressure Polymorph Ojakangas G. W.* Malhotra R. Thermal and Orbital History of a Blocky Enceladus Mouginis-Mark P. J.* Flynn L. P. Galileo Observations of Volcanic Hot Spots on Io: Predictions from Thermal Data of Hawaiian Eruptions Johnson T. V.* Matson D. L. Blaney D. L. Veeder G. J. Davies A. G. Stealth Plumes on Io Blaney D. L.* Hanner M. S. Russell R. Lynch D. Hackwell J. The Infrared Distribution on SO2 Frost on Io: The Effect of Thermal Emission on the Estimation of Frost Abundances Davies A. G.* Silicate Lava Models and the Io Thermal Outburst of 9 January, 1990 Morris R. L.* Domingue D. L. Volcanic Color Units on the Surface of Io Tuesday, March 14, 1995 CHONDRULE FORMATION 8:30 a.m. Room A Chair(s): I. D. Hutcheon J. P. Greenwood Hood L. L.* Formation of Nebular Shock Waves and Resulting Thermal Histories of Chondrule Precursor Grains Wood J. A.* Were Chondrules Formed Early or Late in the Protosolar Nebula? Hutcheon I. D.* Jones R. H. The 26Al-26Mg Record of Chondrules: Clues to Nebular Chronology Sears D. W. G.* Huang S. Benoit P. H. The Formation of Chondrules Eisenhour D. D.* Buseck P. R. Radiative Heating and the Size Distribution of Pre-Chondrule Aggregates of Dust Huang S.* Sears D. W. G. Gas Flow and Fluidization in a Thick Dynamic Regolith: A New Mechanism for the Formation of Chondritic Meteorites Alexander C. M. O'D.* Formation of Chondrules by Recycling and Volatile Loss Yu Y.* Hewins R. Is Non-Linear, Rapid Cooling Plausible for Chondrule Formation? Evidence from Olivine Zoning Profiles Greenwood J. P.* Hess P. C. Dissolution and Melting Kinetics: Applications to Chondrules Jones R. H.* Danielson L. R. A Chondrule Origin for Dusty, Relict Olivine Grains Brearley A. J.* Layne G. D. Light Lithophile Element (Li, Be, B) Abundances in Microchondrules in CH Chondrites: Insights into Volatile Behavior During Chondrule Formation Inoue M. Nakamura N.* REE Abundances in Chondrules from Murchison and Yamato-793321 (CM) Meteorites: Constraints on the Formation of CM Chondrules Lofgren G. E.* DeHart J. M. Some Observations on the Petrology of Enstatite Chondrites PCA91020 and EET87746 with Implications for Chondrite Forming Processes Tuesday, March 14, 1995 MARS GEOPHYSICS 8:30 a.m. Room B Chair(s): K. E. Herkenhoff R. A. Craddock Frey H. V.* Bills B. G. Nerem R. S. Roark J. H. The Isostatic State of Martian Topography--Revisited Turtle E. P.* Melosh H. J. Martian Elastic Lithospheric Thickness from Flexural and Gravitational Modeling Kiefer W. S.* Zuber M. T. Williams K. K. Modeling Gravity Anomalies at Martian Shield Volcanos: A Reduced Estimate of Elastic Lithosphere Thickness at Olympus Mons Zuber M. T.* Smith D. E. Robbins J. W. Mars Without Tharsis Anderson F. S.* Grimm R. E. Crustal Thickness Variations at Valles Marineris, Mars Schultz R. A.* Senske D. A. Relationship Between Uplift, Faulting, and Strain Across Valles Marineris, Mars Golombek M. P.* Franklin B. J. Tanaka K. L. Dohm J. M. Banerdt W. B. Extension Across Thaumasia and Around Tharsis on Mars Pruis M. J.* Tanaka K. L. The Martian Northern Plains Did Not Result from Plate Tectonics Carruthers M. W.* Igneous Activity and the Origin of the Fretted Channels, Southern Ismenius Lacus, Mars Lopes-Gautier R.* Bruno B. Taylor G. J. Kilburn C. Lava Flows on Alba Patera: Analysis of Flow Properties Using Three Complementary Models Barlow N. G.* Degradation Studies of Impact Craters in the Mangala Valles Region of Mars Murray J. B.* Iliffe J. C. Martian Impacts and the Grooves of Phobos: Implications for the Evolution of Phobos' Rotation Axis Tuesday, March 14, 1995 LUNAR HIGHLAND ROCKS AND GEOLOGY 8:30 a.m. Room C Chair(s): J. J. McGee G. Snyder Hawke B. R.* Peterson C. A. Lucey P. G. Taylor G. J. Blewett D. T. Spudis P. D. Remote Sensing Studies of Lunar Anorthosite Deposits Premo W. R.* Tatsumoto M. Pb Isotopes of Non-Mare Lunar Rocks (>3.9 Ga): Constraints on Early Lunar Evolution Snyder G. A.* Taylor L. A. The Growth and Modification of Lunar Crust: KREEP Basalt Crystallization and Precipitation of Mg- and Alkali Suite Cumulates Shervais J. W.* Stuart J. B. Ion Microprobe Study of Lunar Highland Cumulate Rocks: New Results Schultz P. H.* Making the Man in the Moon: Origin of the Imbrium Basin Haskin L. A.* Moss B. E. McKinnon W. B. How Much Imbrium Material Should be Present at the Apollo 17 Site? Jolliff B. L.* Korotev R. L. Rockow K. M. Haskin L. A. Apollo 17 Impact-Melt Breccias: In Search of Imbrium Components Ryder G.* Stockstill K. Chemical Variation Among Serenitatis Impact Melt Breccia Samples in the Taurus-Littrow Valley, Apollo 17 Landing Site James O. B.* Siderophile Elements in Lunar Impact Melts: Nature of the Impactors Hawke B. R.* Peterson C. A. Coombs C. R. Lucey P. G. Smith G. A. Taylor G. J. McEwen A. S. Robinson M. S. Spudis P. D. Remote Sensing Studies of the Aristarchus Region of the Moon Pinet P. C.* Costard F. Chevrel S. Martin P. Bellagh F. Aristarchus Plateau Spectral Mapping from Clementine and Telescopic High Resolution Spectro-Imaging Data Chevrel S. D.* Pinet P. C. Head J. W. Bellagh F. UV-VIS-NIR Spectral Classification in the Gruithuisen Domes Region Bell J. F. III* Lucey P. G. Blewett D. T. Hawke B. R. Robinson M. S. Roush T. L. Bregman J. D. Rank D. M. Harker D. Temi P. Imaging Spectroscopy of the Moon in the Mid-Infrared: 8.3 to 13.3 Micrometers Image Cubes of Tycho Tuesday, March 14, 1995 CALCIUM-ALUMINUM-RICH INCLUSIONS AND THEIR FORMATION PROCESSES 1:30 p.m. Room A Chair(s): S. S. Russell G. J. MacPherson Tsuchiyama A.* Takahashi T. Uyeda C. Formulation of Isotopic Mass Fractionation by Evaporation of Solids and Its Application to Chondritic Materials Nichols R. H. Jr.* Wasserburg G. J. Grimley R. T. Evaporation of Forsterite: Identification of Gas-phase Species Via Knudsen Cell Mass Spectrometry Davis A. M.* Hashimoto A. Clayton R. N. Mayeda T. K. Isotopic and Chemical Fractionation During Evaporation of CaTiO3 Floss C.* Kransel G. Zinner E. Palme H. Rammensee W. El Goresy A. Trace Element Fractionations in Hibonite-bearing Evaporation Residues: Comparison with Hal-Type Hibonite Inclusions Paque J. M.* Effect of Residence Time at Maximum Temperature on the Texture and Phase Compositions of a Type B Ca-Al-Rich Inclusion Analog Steele I. M.* Peters M. T. Shaffer E. E. Burnett D. S. Minor Element Zoning Revealed by Cathodoluminescence and Substitution of Mg and Na into Synthetic and Natural Anorthite Meeker G. P.* Formation of CAIs by Partial Melting and Accretion During Heating in a Gas of Solar Composition Fahey A.* Huss G. Wasserburg G. Meeker G. P. REE Abundances in Allende 5241 and EGG-6: Correlations with Wide Area Elemental Mapping Simon S. B.* Davis A. M. Grossman L. Crystallization of Compact Type A Refractory Inclusions: Implications from Crystal Zoning and Trace Element Distribution Kennedy A. K.* Bevan A. W. Trace Element Constraints on the Formation of the Rim on a Compact Type A Inclusion Russell S. S.* Fahey A. J. Huss G. R. Wasserburg G. J. Isotopically Unusual Inclusions from CO3 Meteorites: Links to CAIs from Other Meteorite Classes Ruzicka A.* Boynton W. V. Fine-grained CAI's in Efremovka and Leoville: In-situ Layer Growth and Confirmation of a Link to Rims on coarse-grained CAIs Hoppe P.* Kurat G. Walter J. Maurette M. Trace Elements and Oxygen Isotopes in a CAI-bearing Micrometeorite from Antarctica Tuesday, March 14, 1995 MARS GEOLOGY 1:30 p.m. Room B Chair(s): J. R. Zimbelman N. Cabrol Mellon M. T.* Jakosky B. M. The Distribution and Behavior of Martian Ground Ice During Past and Present Epochs Clifford S. M.* Mars: The Response of an Ice-rich Crust to Burial by a Volatile-poor Mantle Metzger S. M.* Martian Sinuous Ridges: Exploring Their Paleoclimate Significance Ruff S. W.* New Clues on the Origin of the Martian Sinuous Ridges Costard F.* Baker V. Thermokarst Landforms and Processes in Ares Vallis, Mars Komatsu G.* Ori G. G. House P. K. Baker V. R. Flow Reconstruction for Ares Vallis, Mars Ori G. G.* Komatsu G. Baker V. R. Geological History of the Area Surrounding the Mouth of the Ares Vallis (Mars) De Hon R. A.* Hydrogeologic Provinces of Mars Moore H. J.* Geology of the Tempe-Mareotis Region, Mars Zimbelman J. R.* An Examination of Hypotheses of Formation for the Enigmatic Massive Deposits in Amazonis Planitia, Mars Fuks K. H.* Treiman A. H. Murchie S. Layering in the Upper Walls of Valles Marineris, Mars: A Diagenetic Origin Dohm J. M.* Tanaka K. L. Geologic Summary of the Thaumasia Region of Mars Based on Detailed Stratigraphy and Crater Statistics Cabrol N. A.* McKay C. P. Grin E. A. Was Life Discontinuous on Mars? Geology and Exobiology Arguments Tuesday, March 14, 1995 LUNAR MANTLE PROCESSES AND MARE BASALTS 1:30 p.m. Room C Chair(s): J. Shervais I. Antonenko Parmentier E. M.* Hess P. C. Spatial and Temporal Scales of Lunar Differentiation: Implications for Subsequent Thermal and Chemical Evolution of the Moon Wagner T. P.* Grove T. L. Origin of High-Ti Lunar Magma by Erosion of Ilmenite Agee C. B.* Circone S. Crystal-Liquid Density Inversions in High-TIO2 Lunar Basalt Longhi J.* Bertka C. M. A Critical End Point to Pigeonite-Augite Liquidus Equilibria Colson R. O.* Colson M. C. Chromium, A Dimer in Silicate Melts?: Implications for Redox Equilibria and Partitioning Rutherford M. J.* Fogel R. A. A15 Green Glass Volatiles and Oxidation State Shearer C. K.* Layne G. D. Papike J. J. Origin of the Apollo 15 Green Glass. Evidence from Ni, Co, Mn, V, and Cr Lindstrom D. J.* Martinez R. R. Trace Elements in Small VLT Basalt Clasts from 72235 Blewett D. T.* Hawke B. R. Lucey P. G. Spudis P. D. Exploring the Crisium Region with Multispectral Imagery Gaddis L.* McEwen A. Robinson M. The Distribution of Localized Lunar Pyroclastic Deposits as Related to Crustal Thickness Antonenko I.* Head J. W. Estimates of Cryptomare Thickness and Volume in Schiller-Schickard, Mare Humorum and Oceanus Procellarum Areas Mustard J. F.* Head J. W. Evidence for Cryptomare in the Northern Light Plains of the Moon Sabol D. E. Jr.* Smith M. O. Adams J. B. Pinet P. C. Tephra Deposits at the Apollo 17 Landing Site Using Telescopic CCD Images Tuesday, March 14, 1995 TEKTITES AND IMPACT STUDIES 1:30 p.m. Room D Chair(s): E. F. Albin T. J. Ahrens Lange J.-M.* Fehr K. T. Grund T. Langenauer M. Meisel T. Palme H. Spettel B. Stoffler D. Moldavites from Lusatia (Germany) II: A Chemical Comparison with Czech Moldavites Albin E. F.* Roden M. F. New Major-Element Abundances and Interelement Correlations for Georgia Tektites Newman S.* Beckett J. Bashir N. Stolper E. Water in an Indochinite: Implications for the Thermal History of Tektites Wasson J. T.* The Disintegration of Comet Shoemaker-Levy 9 and the Tunguska Object and the Origin of the Australasian Tektites Rocchia R.* Robin E. Froget L. Gayraud J. Meon H. Diemer E. The Meteoritic Content of Lybian Desert Glasses Horz F.* Cintala M. J. Bernhard R. P. See T. H. Cratering and Penetration Experiments in Aluminum 1100 Targets Using Soda-Lime Glass Projectiles from 1-7 km/s Davis D. R.* Ryan E. V. Farinella P. On How to Scale Disruptive Collisions O'Keefe J. D.* Ahrens T. J. The Role of Central Peak Oscillation in the Formation of Complex Planetary Craters Pierazzo E.* Vickery A. M. Melosh H. J. A Re-Evaluation of Impact Melt/Vapor Production Schmidt R. M.* Hassig P. J. Asteroid Entry into Venusian Atmosphere: Pressure and Density Fields Schultz P. H.* Effect of Impact-induced Shear Heating on Vaporization and Melting Barnouin O. S.* Schultz P. H . Laboratory Clues to the Emplacement of Distal Ejecta Deposits by Atmospheric Processes Tuesday, March 14, 1995 PLANETARY SCIENCE EDUCATIONAL ACTIVITIES AND TECHNOLOGY 6:30 p.m. LPI Dasch E. J. Keffer L. Pruzan K. The NASA Space Grant Program: An Aid in Proposal Planning Edgett K. S. Christensen P. R. Wakefield D. A. Rigberg B. M. The Arizona Mars K-12 Education Program: Outreach for Mars Global Surveyor, Mars Pathfinder, and Other Missions Betts B. H. Bormanis A. Kenealy R. Nash D. B. Planetary Science Education: The SJI Program Alexander W. M. Schaub G. E. Smith S. R. Adventures in Space and Atmosphere Science Lindstrom M. Allen J. Fitzmaurice R. 'Exploring the Solar System': A Model for Teacher Workshops and Scientist-Educator Partnerships Murali A. V. Space Science and Technology Educational Program for K-12 Students in Southeast Texas: A Multidisciplinary, Multi-Institutional Consortium Study at Lamar University-Beaumont Lebofsky L. A. Lebofsky N. R. Project Artist: Integrating Astronomy and Planetary Sciences into the Elementary and Middle School Curriculum Edwards M. TekLab: Excitement in the Elementary School Douglas D. Space Science Education Program for K-5 Students Rothery D. A. Getting Planetary Science into the Open University Degree Saunders R. S. Limaye S. S. Krauss R. Scientific Analysis and Display of Planetary Data with McIdas-Explorer Kanefsky B. World-Wide-Web Tools for Locating Planetary Images Altner B. Kochhar A. Brandt D. The Internet as a Medium for Public Debate on the Issue of Returning to the Moon Mouginis-Mark P. J. Space Science Education Using the World Wide Web Kanaya A. Development and Use of Multimedia Material in Planetary Science Condit C. D. Tanaka K. L. Mars Geologic Landform Atlas and Reference Source (MGLARS): A Stand-alone Hypermedia Program Designed for Geologic Research, Education and Map/Image/Data Dissemination Strait M. M. The Use of Image Processing in the Classroom Murali A. V. Planetary Rover Unit: A Hands-on Educational Facility to Motivate K-12 Students Towards Excellence in Science and Mathematics Bindschadler D. L. Moore W. B. The Venus Hypermap: Hypermedia Education and Publication Via the World Wide Web Tuesday, March 14, 1995 CLEMENTINE EXPLORES THE MOON 6:30 p.m. LPI Eliason E. M. Malaret E. R. Woodward G. Clementine Mission: The Archive of Image Data Products and Data Processing Capabilities Acton C. H. The Clementine SPICE Archive McEwen A. Becker T. Bennett A. Bowell J. Edwards K. Eliason E. Gaddis L. Isbell C. Howington-Kraus A. Kirk R. Lee E. Morgan H. Robinson M. New Digital Images of the Moon Spudis P. D. Stockstill K. R. Ockels W. J. Kruijff M. Physical Environment of the Lunar South Pole from Clementine Data: Implications for Future Exploration of the Moon Kruijff M. Ockels W. J. Lunar Visibilities and Lighting Conditions Lucey P. G. Taylor G. J. Derivation of Fe Abundance with 1-2 wt% Precision from Clementine Multispectral Imaging Tompkins S. Pieters C. M. Central Peaks of Lunar Impact Craters: New Views from Clementine McEwen A. S. Robinson M. S. Eliason E. M. Lucey P. G. Hawke B. R. Duxbury T. C. Clementine and Groundbased Observations of the Aristarchus Region of the Moon Gillis J. J. Spudis P. D. Clementine Color Mosaics of Procellarum Volcanic Complexes: Evidence for Dome Morphology Linked to Volatile Content and Eruption Rate Shkuratov Yu. G. Stankevich D. G. Can Lunar Opposition Spike Measured by Clementine Exist? Pinet P. C. Shevchenko V. V. Chevrel S. Bellagh F. Rosemberg C. Reiner Gamma Formation: Optical, Spectroscopic and Polarimetric Properties from Clementine and Earthbased Data Oberst J. Cook A. Roatsch T. Scholten F. Storl J. Wewel F. Albertz J. Hoffmann H. Jaumann R. Clementine Stereo Data Analysis: Digital Terrain Models and Rectified Color Images Lemoine F. G. Smith D. E. Zuber M. T. The Gravitational Field of the Moon: Goddard Lunar Gravity Model-1 Williams K. K. Neumann G. A. Zuber M. T. Lunar Mascon Basins: Analysis of Effective Elastic Lithosphere Thickness Using Gravity Anomaly Models Staid M. I. Pieters C. M. Head J. W. A Multispectral View of Stratigraphy in Mare Tranquillitatis Tuesday, March 14, 1995 OUTER PLANETS/SATELLITES 6:30 p.m. LPI McCord T. B. Coombs C. R. Granahan J. Sunshine J. Interpretation of Spectral Compositional Units on the Icy Galilean Satellites Goguen J. D. Investigation of Callisto's Unusual Photometric Properties using a 'Phase Cube' of Voyager Images Helfenstein P. Veverka J. Hillier J. Callisto's Regolith: A Better Estimate of the Ice/Silicate Ratio Head J. Murchie S. Collins G. A Pre-Galileo Review of Major Geologic Questions About Ganymede Schenk P. Iaquinta-Ridolfi F. Geology of Large Impacts Basin on Ganymede and Callisto Duxbury N. S. Brown R. H. The Plausibility of Boiling Geysers on Triton Kargel J. S. Hogenboom D. L. The Ammonia-Water System: An Attempt to Reconcile the LaFayette and UCLA Investigations Goldsby D. L. Kohlstedt D. L. The Transition from Dislocation to Diffusion Creep in Ice Lorenz R. Cassini Mission: Radar Sensing of Craters on Titan Tuesday, March 14, 1995 ORIGINS OF PLANETARY SYSTEMS 6:30 p.m. LPI Jin L. Clayton D. D. Anomalous-Cosmic Ray Origin of 26Al in Molecular Clouds Spergel M. S. Source of Nuclei Production in the Protosolar Nebula Bringol L. A. Hyde T. W. Grain Charging in a Dusty Plasma Hyde T. W. Nazzario R. Dust Grain Resonances in Protoplanetary Systems KenKnight C. E. Realism in Nebular Simulations Weidenschilling S. J. Davis D. R. Multi-Zone Modeling of Planetary Accretion: Updated Results Gor'kavyi N. Numerical Study of Formation of Satellite Systems: Prograde and Retrograde Satellites of Jupiter, Saturn and Neptune Tuesday, March 14, 1995 MARS EXPLORATION 6:30 p.m. LPI Shelfer T. D. Morris R. V. Nguyen T. Q. Agresti D. G. Wills E. L. Backscatter Mossbauer Spectrometer (BaMS) for Solid-Surface Extraterrestrial Mineralogical Analysis Wdowiak T. J. Agresti D. G. Mirov S. B. A Laser Raman Spectrometer System Suitable for Incorporation into Lander Spacecraft Banerdt W. B. Lognonne P. Pike T. Kaiser W. Karczewski J. F. Cacho S. Cavoit C. Striebig N. An Ultra-Broad-Band Seismic System for Exploring the Interior of Mars Kerridge J. F. Carr M. H. Clark B. C. DesMarais D. J. DeVincenzi D. L. Farmer J. D. Hayes J. M. Holland H. Jakosky B. M. Joyce G. F. Klein H. P. Knoll A. H. McDonald G. D. McKay C. P. Meyer M. A. Nealson K. H. Shock E. L. Ward D. M. The Exobiological Exploration of Mars Cabrol N. A. Brack A. Episodic Oasis for Water-Dependant Life on Mars Allton J. H. A Case for Sterile Sample Return from Mars: Alternative to Quarantine Araghi K. Oxygen Production from Carbon Dioxide by Zirconia Electrolysis Allen C. C. Treiman A. H. Who Needs a Few More Mars Samples When We Already Have the SNCs? Tuesday, March 14, 1995 MERCURY 6:30 p.m. LPI Robinson M. S. Edwards K. A New Digital Image Mosaic of Mercury Tuesday, March 14, 1995 REMOTE SENSING 6:30 p.m. LPI Grant J. A. Schultz P. H. Collins W. K. Effectiveness of Ground Penetrating Radar in Argentine Loess: Implications for Future Mars Surface Radar Sounders Oehler A. Dummel A. Hanowski N. Rebhan H. Neukum G. Spectral Photometric Parameters (UV, VIS, NIR) for 13 Materials Similar to Lunar and Asteroidal Regoliths Wenrich M. L. Christensen P. R. Deriving the Optical Constants of Quartz Using Thermal Emission Spectroscopy Hays J. E. Mustard J. F. Effects of Particles <= Lambda of Light on Reflectance Spectra Clark P. E. Trombka J. Floyd S. Solar Monitor Design for the NEAR X-Ray Spectrometer Harris A. W. Bowell E. L. G. Muinonen K. Evaluation of CCD Systems for NEO Surveys McKay D. S. Wentworth S. J. McBride K. M. Patinas on Lunar Rocks: The Unusual Surface of Apollo 17 Basalt 75075 Keller L. P. Christoffersen R. McKay D. S. The Oxidation State of Altered Rims on Ilmenite from Lunar Soils Fischer E. M. Pieters C. M. A Model for Lunar Soil Optical Alteration Due to Space Weathering Lucey P. G. Modeling the Spectral Effects of Microscopic Iron Metal on Glass and Minerals Clark R. N. Swayze G. A. Automated Spectral Analysis: Mapping Minerals, Amorphous Materials, Environmental Materials, Vegetation, Water, Ice and Snow, and Other Materials: The USGS Tricorder Algorithm Lucey P. G. A Mixing Model Approach to Obtaining Quantitative Mineralogy from Spectra of Lunar Soils Holasek R. Self S. Satellite Observations and Measurements of the 1991 Mount Pinatubo Eruption Tuesday, March 14, 1995 DIFFERENTIATED METEORITES 6:30 p.m. LPI Masarik J. Reedy R. C. Production of Cosmogenic Nuclides in SNC Meteorites in the Martian Surface Mittlefehldt D. W. Lindstrom M. M. Hunting the HED Holy Grail: A (Slightly) Magnesian Basalt Clast from EET 92014 Howardite and a Review of Alleged Primary, Magnesian HED Basalts Grove T. L. Compositional Variability in Diogenite Pyroxene: Constraints from Experiments on Magnesian Eucrite Parent Magmas Jurewicz A. J. G. Jones J. H. Mittlefehldt D. W. Longhi J. Making Melts Having 40%, 50%, or 60% SiO2 from Chondritic Materials: A Synopsis of Low-Pressure, Low-Volatile, Equilibrium Melting Relations Hanowski N. Brearley A. J. Pyroxene Microstructures in the Equilibrated Eucrite Juvinas Domeneghetti M. C. Molin G. M. Palme H. Stimpfl M. Zipfel J. Low Temperature Thermal History of Non-Chondritic Meteorites as Deduced from Fe2+-Mg Ordering in Orthopyroxene Mikouchi T. Chikami J. Takeda H. Miyamoto M. Mineralogical Study of LEW88774: Not So Unusual Ureilite Guan Y. Crozaz G. The Quest for the Elusive LREE Carrier in Ureilites: An Ion Microprobe Study Shimaoka T. K. Shinotsuka K. Ebihara M. Prinz M. Whole Rock Compositions of Aubritic Meteorites: Implications for Their Origin Yang C.-W. Williams D. B. Goldstein J. I. AEM Study of the Metal Phases in Meteorites Tuesday, March 14, 1995 MARS GEOLOGY/GEOPHYSICS 6:30 p.m. LPI Fori A. N. Schultz R. A. Analysis of Fault Lengths Across West Candor Plateau, Valles Marineris, Mars Anderson R. C. Peer B. J. An Analytical Approach to Identifying Radial Lineaments Associated with the Tharsis Region of Mars Kiefer W. S. Johnson M. S. Physical Properties Controlling the Style of Extensional Deformation in the Tharsis Region of Mars Crumpler L. S. Head J. W. Aubele J. C. Magma Chambers Associated with Calderas on Mars: Significance of Long-term Magma Replenishment Rates Maciejak F. Lenat J. -F. Provost A. Volcano-Tectonic Evolution of Tharsis Tholus, Mars Crown D. A. Stewart K. H. Debris Aprons in the Eastern Hellas Region of Mars Crown D. A. Peitersen M. N. Downflow Morphologic Variations in Hawaiian and Martian Lava Flows Fagents S. A. Wilson L. Basaltic Volcanic Activity on Mars: Numerical Modelling of Lava Fountain Eruptions Tatsumura M. J. Mouginis-Mark P. J. Eruption Characteristics of Long Lava Flows on the Northern Flank of Elysium Mons, Mars Jons H.-P. Large-Scale Emplacement of Young Lavas in the Area of the TaNoVa-Updoming, Mars Murray J. B. Rothery D. A. Digital Elevation Models of the North Polar Regions of Mars Lucchitta B. K. Kasei Valles, Mars (II): The Ice Story Parker T. J. Schenk P. M. Viking Stereo of the Martian Crustal Dichotomy in Southern Elysium: Evidence for Extensive Fluvial and Coastal Erosion? Cabrol N. A. Grin E. A. Dawidowicz G. Shalbatana Vallis (Mars): Headwater Migrations as an Alternative to Recharge Process Herkenhoff K. E. Geologic Map of the MTM-85000 Quadrangle, Mars Socki R. A. Romanek C. S. Gibson E. K. Jr. Cryogenic Weathering as a Mechanism for Extreme 13C Enrichment in Martian Carbonate: Soil from Wright Valley, Antarctic as a Terrestrial Analog Horai K. Fujii C. Nakagawa H. Matsui T. Thermal Conductivity of Powdered Silicates Under Simulated Martian Surface Conditions Craddock R. A. Maxwell T. A. Howard A. D. Morphometric Analyses of Martian Highland Impact Craters Demura H. Kurita K. Regional Variation of Onset Diameter in the North of Elysium, Mars Mauldin L. C. Grimm R. E. Crustal and Lithospheric Structure of Martian Impact Basins Frey H. V. Roark J. H. A Multi-ring Impact Basin in Thaumasia Komatsu G. Baker V. R. Johnson J. R. Ares Vallis: Flood Geomorphology of Mars Pathfinder Landing Site Edgett K. S. Physical Properties of the Ares Valles (Primary) and Trouvelot Crater (Back-up) Landing Sites for Mars Pathfinder: Thermal Inertia and Rock Abundance from Viking IRTM Observations Edgett K. S. Rice J. W. Very Young Volcanic, Lacustrine, and Fluvial Features of the Cerberus and Elysium Basin Region, Mars: Where to Send the 1999 Mars Surveyor Lander Golombek M. P. Parker T. J. Moore H. J. Mars Pathfinder Landing Site Characteristics Bertka C. M. Fei Y. An Experimental Study of the Internal Structure of Mars Jurgens R. F. Slade M. A. Franck C. R. Howard S. D. Standish E. M. Winkler R. Choate D. Cormier R. Dendrenos P. Rose R. Goldstone 3.5-cm Radar Observations of the 1995 Mars Opposition Smith D. E. Zuber M. T. Progress in Improving Our Knowledge of the Shape of Mars from Occultations Tuesday, March 14, 1995 MARS SPECTROSCOPY 6:30 p.m. LPI Hamilton V. E. Christensen P. R. Interpreting the Origins and Evolutions of Martian Basalts from Pyroxene Composition: I. Orthopyroxenes Rowland C. M. Roush T. L. Sloan G. C. Bell J. F. III Thermal Infrared (7-14 Micrometers) Spectral Imaging of Mars Erard S. ISM at Mars and Phobos: The Imaging Spectroscopy Data Base Agresti D. G. Wdowiak T. J. Wade M. L. Armendarez L. P. Farmer J. D. A Mossbauer Investigation of Hot Springs Iron Deposits Tuesday, March 14, 1995 LUNAR HIGHLANDS, MARE, AND SURFACES 6:30 p.m. LPI Longhi J. Jurewicz S. R. Plagioclase-Melt Wetting Angles and Textures: Implications for Anorthosites Kadik A. A. Lebedev Ye. B. Separating the Melt from the Crystalline Matrix: Simulation in a Centrifuge Premo W. R. Evidence for Metamorphic Pb in Ancient Lunar Highland Rocks (>3.9 Ga)?: An Alternative Explantation for 'Ugly' U-Pb Systematics Grier J. A. Kring D. A. Swindle T. D. Impact Melts and Anorthositic Clasts in Lunar Meteorites Clasts in Lunar Meteorites QUE93069 and MAC88105 Hill D. H. Marvin U. B. Boynton W. V. Clasts from the Calcalong Creek Lunar Meteorite Albrecht A. Herzog G. F. Klein J. Middleton R. Schultz L. Weber H. W. Kallemeyn G. W. Warren P. H. Trace Elements, 26Al and 10Be, and Noble Gases in Lunar Rock 14286 Flynn B. C. Stern S. A. On the Stoichiometry of Metal Abundances in the Lunar Atmosphere Sisterson J. M. Schneider R. J. Jr. Jull A. J. T. Donahue J. Cloudt S. Beverding A. Englert P. A. J. Castaneda C. Vincent J. Reedy R. C. Production Cross Sections for 14C From Elements Found in Lunar Rocks: Implications for Cosmic Ray Studies Masarik J. Reedy R. C. Low-Energy Neutrons and Reaction Products in the Lunar Surface Snyder G. A. Hall C. M. Taylor L. A. Halliday A. N. 40Ar/39Ar Ages of Apollo 11 Group D Basalts: Evidence of High-Ti Volcanism in the Nectaris Basin and a Probable 2.0 Ga Age for Crater Theophilus? Scherer E. E. Beard B. L. Barovich K. M. Johnson C. M. Taylor L. A. An Improved Method for Determining the Hf Isotopic Composition of Lunar Basalts McGee J. J. James O. B. Mineral-Chemical Variations During Basalt Crystallization Cazzaniga A. M. Hess P. C. Possible Source Compositions for Lunar Picritic Glasses: Ilmenite vs. Karooite Coombs C. R. Hawke B. R. Lunar Pyroclastics: Hide'n Seek Weitz C. M. Head J. W. III Lunar Pyroclastic Deposits: Nature and Distribution of Pyroclastic Glasses at Taurus-Littrow Yingst R. A. Head J. W. III Spatial and Areal Distribution of Lunar Mare Deposits in Mare Orientale and South Pole/Aitken Basin: Implications for Crustal Thickness Relationships O'Keefe J. A. The Earth as a Ringed Planet Tuesday, March 14, 1995 LUNAR EXPLORATION, REMOTE SENSING, SAMPLING, AND ANALYTICAL METHODS 6:30 p.m. LPI Meyer C. An Outline of the Jules Verne Discovery Mission to Explore the Lunar Mantle Via South Pole-Aitken Basin Lamb M. Ma K. B. Cooley R. Mackey D. Meng R. Chu C. W. Chu W. -K. Chen P. C. Wilson T. L. Protoype Superconducting Lunar Telescope Mount Kaneko Y. Takizawa Y. Kawazoe T. Lunar Orbiting Observatory Mission Johnson P. E. Pinet P. C. Chervrel S. D. Sabol D. Adams J. B. Multispectral Mixture Modeling of the Apollo 15 Landing Site Hiesinger H. Jaumann R. Neukum G. Comparison of Unsampled Lunar Basalts Starukhina L. V. Shkuratov Yu. G. Simulation of the Albedo-Color Diagrams for the Moon and Asteroids Calvin W. M. Kieffer H. H. Soderblom L. A. Sunshine J. M. Lunar Silicate Absorptions Mapped by Galileo NIMS Gaddis L. McEwen A. Becker T. Recalibration of Galileo SSI Lunar Data From EM1: The Effects of Scattered Light Removal Benoit P. H. Sears D. W. G. The Use of Lunar Soil for Non-Critical Radiation Dosimetry for Robotic Rovers Sutter B. Hossner L. R. Ming D. W. Henninger D. L. Phosphorus Adsorption and Desorption Properties of Minnesota Basalt Lunar Simulant Hayes S. A. Bustin R. M. Allen C. C. Reduction of Iron Oxides in Simulated Lunar Soil Using Carbon as the Reducing Agent Anderson W. W. Ahrens T. J. Scott R. F. Model for Penetration of Surficial Materials by a Coring Projectile Norman M. D. Laser Ablation ICPMS: A Powerful New Tool for Microbeam Trace Element Analysis Sutton S. R. Rivers M. L. GSECARS: A National Resource for Earth and Planetary Science Research at the Advanced Photon Source, Argonne National Laboratory Hillgren V. J. Determining the Oxygen Fugacity of Experimental Charges: Don't Believe Everything You Calculate Wednesday, March 15, 1995 CHONDRITES 8:30 a.m. Room A Chair(s): M. K. Weisberg M. I. Petaev Bennett M. E. III* McSween H. Y. Jr. An Internal Heating Model for the L Chondrite Asteroidal Parent Body Shinotsuka K. Ebihara M.* A Metamorphic Sequence of Ordinary Chondrites Based on the Distribution of REE, Th and U Petaev M. I.* Breakdown of Primary Na,Al-rich Pyroxene in an Al-rich Object from the Gorlovka H3-4 Chondrite: Evidence for Secondary Heating and Partial Melting Krot A. N.* Zolensky M. E. Wasson J. T. Scott E. R. D. Mendybaev R. A. Ohsumi K. Parent-Body Alteration of Type 3 Ordinary Chondrites Nehru C. E.* Weisberg M. K. Prinz M. Parnallee (LL 3.6) Heating Experiments: Implications for the Origin of Type 6 and 7 Chondrites Flynn G. J.* Thomas K. L. Bajt S. Sutton S. R. Klock W. Clark L. The Chemical Composition of Semarkona Matrix: Implications for Formation and Aqueous Alteration and a Comparison to Hydrated IDPs Endress M.* Bischoff A. The Compositional Variability of Dolomites in CI Chondrites: Implications for Physico-Chemical Conditions of Circulating Fluids on the CI Parent Body Cassen P.* On the Abundances of Moderately Volatile Elements in Meteorites Dodd R. T.* Wolf S. F. Wang M. S. Lipschutz M. E. Streams of H4-6 Chondrite Falls: A Progress Report Schultz L.* Weber H. W. Noble Gases in Chondrites from a Proposed Meteoroid Stream Hsu W.* Crozaz G. Negative Sm, Eu, and Yb Anomalies in Enstatite from UECs: The Results of Evaporation or Igneous Fractionation? Weisberg M. K.* Boesenberg J. S. Kozhushko G. Prinz M. Clayton R. N. Mayeda T. K. EH3 and EL3 Chondrites: A Petrologic-Oxygen Isotopic Study Rubin A. E.* Scott E. R. D. Keil K. Shock Metamorphism of Enstatite Chondrites Wednesday, March 15, 1995 METEORITES AND MARS I: SURFACE, VOLATILES, AND ATMOSPHERE 8:30 a.m. Room B Chair(s): A. H. Treiman V. C. Gulick McCoy T. J.* Wadhwa M. Keil K. Zagami: Another New Lithology and a Complex Near-Surface Magmatic History Friedman R. C.* Taylor G. J. Treiman A. Processes in Thick Lava Flows: Nakhlites (Mars) and Theo's Flow (Ontario, Earth) Griffith L. L.* Shock E. L. Arvidson R. E. Calculating the Effects of Hydrothermal Alteration on Mars Swindle T. D.* Burkland M. K. Grier J. A. Lindstrom D. L. Treiman A. H. Noble Gas Analysis and INAA of Aqueous Alteration Products from the Lafayette Meteorite: Liquid Water on Mars <350 Ma Ago Schaefer M. W.* Paleosols on Mars: Another Look at the Viking Lander Measurements Leshin L. A.* Epstein S. Stolper E. M. The Abundance and D/H of Water Dissolved in EETA 79001 Shocked Glass and Crystalline Host Stephens S. K.* Stevenson D. J. Rossman G. R. Carbonates on Mars: Experimental Results Porcelli D.* Wasserburg G. J. Origin of Rare Gases in the Terrestrial Atmosphere and Planetary Comparisons Jakosky B. M.* Reedy R. C. Masarik J. 14C Measurements of the Martian Atmosphere: An Indication of Surface-Atmosphere Exchange of CO2 Craddock R. A.* Greeley R. Estimates of the Amount and Timing of Gases Released into the Martian Atmosphere from Volcanic Eruptions Gulick V. C.* Tyler D. Haberle R. M. McKay C. P. Effects and Lifetime of Ocean Induced CO2 Pulses on Mars: Implications for Fluvial Valley Formation Fanale F. P.* Postawko S. E. Mass Loading and the Early Mars Greenhouse: When a Pollutant Becomes the Environment Wednesday, March 15, 1995 METEORITES FROM THE MOON 8:30 a.m. Room C Chair(s): R. P. Harvey Gladman B.* Burns J. A. Lee P. Delivery of Lunar Meteorites to Earth Kring D. A.* Hill D. H. Boynton W. V. The Geochemistry of a New Lunar Meteorite, QUE93069, a Breccia with Highland Affinities Lindstrom M. M.* Mittlefehldt D. W. Morris R. V. Martinez R. R. Wentworth S. J. QUE93069, A More Mature Regolith Breccia for the Apollo 25th Anniversary Warren P. H.* Kallemeyn G. W. QUE93069: A Lunar Meteorite Rich in HASP Glasses Nishiizumi K.* Caffee M. W. Finkel R. C. Reedy R. C. Exposure History of Lunar Meteorite QUE93069 Wednesday, March 15, 1995 LUNAR SURFACE PROCESSES 9:45 a.m. Room C Chair(s): A. Basu L. A. Taylor Taylor L. A.* Rossman G. R. Qi Q. Where Has All the Lunar Water Gone? Kim J. S. Kim Y. Marti K. Kerridge J. F.* The Isotopic Signature of Recently Implanted Solar Nitrogen in 68815 Becker R. H.* An Evaluation of Possible Explanations for 'Excess' Nitrogen in the Lunar Regolith Wieler R.* Baur H. Solar Xe, Kr, and Ar in Lunar Samples; Do They Get Fractionated in the Sun or on the Moon? Reedy R. C.* Masarik J. Cosmogenic-Nuclide Depth Profiles in Lunar Rocks Nishiizumi K.* Kohl C. P. Arnold J. R. Finkel R. C. Caffee M. W. Masarik J. Reedy R. C. Final Results of Cosmogenic Nuclides in Lunar Rock 64455 Symes S. J. K.* Benoit P. H. Sears D. W. G. McKay D. S. The Luminescing Lunar Regolith Basu A.* McKay D. S. Morris R. V. Wentworth S. Variations of the Ferromagnetic Resonance Index (IS/FeO) of Individual Aggultinates Wednesday, March 15, 1995 CRATERS ON THE EARTH WITH DIAMONDS 8:30 a.m. Room D Chair(s): D. J. Roddy W. U. Reimold Roddy D. J.* Shoemaker E. M. Anderson R. R. Manson Impact Structure Research Program: Summary Through January 1995 Anderson R. R.* Witzke B. J. Hammond R. H. Watkins D. K. Preliminary Investigation of Shocked Grains (Manson Ejecta?), Paleontology, and Depositional Features in the Crow Creek Member, Pierre Shale (Upper Cretaceous) of Southeastern South Dakota and Northeastern Nebraska, and Its Effect on ... Koeberl C.* Reimold W. U. Brandt D. The Newporte Impact Structure, North Dakota: Shock Metamorphism in Breccias Schmidt G.* Palme H. Kratz K.-L. The Fractionation of Os, Re, Ir, Ru, Rh, Pd and Au in Impact Melts from European Impact Craters (Saaksjarvi, Mien and Dellen) and the Determination of the Meteoritic Components French B. M.* Koeberl C. Gilmour I. Shirey S. B. Dons J. A. Naterstad J. Petrology and Geochemistry of Target Rocks and Breccias from the Gardnos Impact Structure, Norway Reimold W. U.* Gibson R. L. Colliston W. P. Layer P. W. The Vredefort Dome in the Witwatersrand Basin: New Argon Chronological Data and the Geochronological Record of the Central Kaapvaal Craton Between >3 and <1 Ga Ago Master S.* Armstrong R. A. Brandt D. Ferraz M. F. F. Gumede T. Koeberl C. Reimold W. U. Robertson D. J. Woldai T. Zeil P. New Geological, Geophysical and Remote Sensing Data From the Highbury Impact Structure, Zimbabwe Koeberl C.* Masaitis V. L. Langenhorst F. Stoffler D. Schrauder M. Lengauer C. Gilmour I. Hough R. M. Diamonds From the Popigai Impact Structure, Russia Hough R. M.* Wright I. P. Pillinger C. T. Gilmour I. Microdiamonds from the Iridium-rich Layer of the Arroyo El Mimbral K-T Boundary Outcrop, N. E. Mexico Shelkov D.* Verchovsky A. B. Pillinger C. T. Hutchison R. Milledge H. J. Carbonado: More Clues to a Common Impact Origin for Samples from Brazil and the Central African Republic Gilmour I.* Hough R. M. Wright I. P. Pillinger C. T. A Carbon Isotope Study of Refractory Carbon Phases in Impact Melt Rocks from the Nordlinger Ries Crater Herrick R. R.* Lyons S. N. Inversion of Impact Crater Morphometric Data Wednesday, March 15, 1995 METEORITES AND MARS II: FOCUS ON ALH 84001 1:30 p.m. Room A Chair(s): D. Mittlefehldt M. Wadhwa Jakosky B. M.* Jones J. H. Mars Volatile Evolution from SNC and Planetary Data Analysis Knott S. F. Ash R. D. Turner G.* 40Ar-39Ar Dating of ALH84001: Evidence for the Early Bombardment of Mars Nyquist L. E.* Bansal B. M. Wiesmann H. Shih C.-Y. 'Martians' Young and Old: Zagami and ALH84001 Wentworth S. J.* Gooding J. L. Carbonates in the Martian Meteorite, ALH84001: Water-borne but not like the SNCs Harvey R. P.* McSween H. Y. Jr. Carbonates in the Martian Orthopyroxenite ALH 84001: Evidence of Formation During Impact-driven Metasomatism Romanek C. S.* Thomas K. Gibson E. K. McKay D. S. Socki R. A. Petrogenesis of Carbon and Sulfur-bearing Minerals in the Martian Meteorite ALH84001 Thomas K. L.* Romanek C. S. Clemett S. J. Gibson E. K. McKay D. S. Maechling C. R. Zare R. N. Preliminary Analysis of Polycyclic Aromatic Hydrocarbons in the Martian (SNC) Meteorite ALH 84001 Wadhwa M.* Crozaz G. Constraints on the Rare Earth Element Characteristics of Metasomatizing Fluids in the Martian Meteorite ALH84001 Mittlefehldt D. W.* Lindstrom M. M. Gibson E. K. ALH 84001: Trace Element Geochemical Similarites of its Trapped Melt Component to Nakhla, Lafayette and Chassigny Bogard D. D.* Exposure-Age-Initiating Events for Martian Meteorites: Three or Four? Yanai K.* Re-searching for Martian Rocks from Diogenite-Diogenitic Achondrites Mayeda T. K. Yanai K. Clayton R. N.* Another Martian Meteorite Wednesday, March 15, 1995 THE CHICXULUB SYNDROME 1:30 p.m. Room B Chair(s): A. C. Ocampo B. F. Bohor Grant J. A.* Schultz P. H. Campos-Enriquez J. O. Definition of Shallow Subsurface Structure Around the Chicxulub Impact Crater Using Ground Penetrating Radar Hildebrand A. R.* Pilkington M. Connors M. Ortiz-Aleman C. Chavez R. E. Chicxulub Crater Size and Structure as Revealed by Horizontal Bouguer Gravity Gradients and Cenote Distribution Sigurdsson H.* D'Hondt S. Carey S. Espindola J. M. Macias J. L. Geochemistry of the Cretaceous/Tertiary Impact Ejecta Deposit in Mexico and Belize Gerasimov M. V.* Dikov Yu. P. Yakovlev O. I. Wlotzka F. High Temperature Vaporization of Quartz-Calcite-Anhydrite/Gypsum Targets in Relation to Chicxulub Impact Alvarez W.* Claeys P. Kieffer S. W. Emplacement of KT-Boundary Shocked Quartz from Chicxulub Crater Bohor B. F.* Fisler D. K. Gratz A. J. Distinguishing Between Shock and Tectonic Lamellae With the SEM Boslough M. B.* Cygan R. T. Izett G. A. NMR Spectroscopy of Quartz from the K/T Boundary: Shock-induced Peak Broadening, Dense Glass, and Coesite Robin E.* Gayraud J. Froget L. Rocchia R. Spinel from the Cretaceous-Tertiary Boundary: Characteristics, Origin and Implications Heymann D.* Nazarov M. A. Korochantsev A. Smit J. The Chicxulub Event: Did it Produce a Global Layer of Fullerene-bearing Sediments? Becker L.* Bada J. L. Bunch T. E. Fullerenes in the K/T Boundary: Are They a Result of Global Wildfires Premo W. R.* Izett G. A. Meeker G. P. Major-Element and Isotopic Compositions of Relic Tektites and Glass-like Shards from the K-T Boundary Spherule Bed at El Mimbral, Mexico Wednesday, March 15, 1995 SPECIAL SESSION: DISCOVERY 1:30 p.m. Room C Speakers to be announced Wednesday, March 15, 1995 NASA PROGRAMS UPDATE 5:30 p.m. Room A Speakers to be announced Thursday, March 16, 1995 DIFFERENTIATED METEORITE MELANGE 8:30 a.m. Room A Chair(s): R. O. Pepin H. Haack El Goresy A.* Zinner E. Pellas P. Caillet C. Acapulco's Graphite Menagerie: Diverse Carbon and Nitrogen Isotopic Signatures Kim Y.* Zipfel J. Marti K. Evolutionary Trends in Acapulcoites and Lodranites: Evidence from N and Xe Signatures Benedix G. K.* McCoy T. J. Keil K. Textural and Mineralogical Variations in Winonaites: Clues to the History of the IAB Iron-Winonaite Parent Body Scott E. R. D.* Love S. G. Haack H. Fragmentation and Reaccretion of Differentiated Asteroids: Evidence from Thermal Histories of Meteorites and Theoretical Constraints Haack H.* Ulff-Moller F. Rasmussen K. L. The Thermal Evolution of IVA Iron Meteorites: Evidence from Metallographic Cooling Rates Shen J. J.* Papanastassiou D. A. Wasserburg G. J. Precise Re-Os Determinations on IIA and IVA Iron Meteorites Smoliar M. I.* Walker R. J. Morgan J. W. Shirey S. B. Comparative Re-Os Isotope Systematics in IIA and IIIA Iron Meteorites Chen J. H.* Wasserburg G. J. A Comparison Between 107Pd and 53Mn Chronometers in Some Meteorites Olsen E. J.* Davis A. M. Clayton R. N. Mayeda T. K. Clarke R. S. Jr. Wasson J. T. Mbosi: An Anomalous Iron with Anomalous Silicate Inclusions Klein J.* Middleton R. Xue S. Herzog G. F. Masarik J. Reedy R. C. 59Ni in Canyon Diablo Spheroids Mathew K. J.* Begemann F. Solar Ne in the Brenham Pallasite Pepin R. O.* Rider P. E. Examination of Kr and Xe Isotopes in Pesyanoe by Acid-Etching Fahey A.* Huss G. Wasserburg G. Lodders K. REE Abundances and Cr Isotopic Composition of Oldhamite and Associate Minerals from the Pena Blanca Spring Aubrite Thursday, March 16, 1995 VENUS RESURFACING AND LITHOSPHERIC PROPERTIES 8:30 a.m. Room B Chair(s): A. T. Basilevsky C. L. Johnson Head J. W. III* Venus: Synthesis of Observations, Outstanding Questions, and Implications for Future Exploration Turcotte D. L.* Magellan, Venus, and the Earth Price M.* Resurfacing History of the Venusian Plains Based on Distribution of Impact Craters Basilevsky A. T.* Head J. W. Stratigraphic Studies in the Area of Baltis Vallis, Venus Kreslavsky M. A.* Size Distribution of Young and Old Coronae on Venus Wichman R. W.* Crater Morphometry on Venus: Relative Floor Size and Internal Crater Modification Namiki N.* Solomon S. C. Degassing of Argon, Helium, and Water and the Nature of Crustal Formation on Venus Johnson C. L.* Sandwell D. T. Regional Resolution Analyses of Magellan Gravity Data McGovern P. J.* Simons M. Solomon S. C. Estimates of Elastic Lithosphere Thickness and Heat Flux Beneath Large Volcanoes on Venus Simons M.* Solomon S. C. Hager B. H. Admittance Constraints on the Thickness of the Venusian Lithosphere? Freed A. M.* Melosh H. J. Long Term Survival of the Topography of Ishtar Terra, Venus Brown C. D.* Grimm R. E. Impact Crater Rebound and Lithospheric Structure on Venus Thursday, March 16, 1995 THE NEAR MISSION AND THE NATURE OF S-CLASS ASTEROIDS 8:30 a.m. Room C Chair(s): S. Murchie M. J. Gaffey Veverka J.* Malin M. Murchie S. Bell J. III Chapman C. McFadden L. Robinson M. Thomas P. Asteroid 433 Eros: High Resolution Imaging and Spectral Mapping from NEAR Trombka J. I.* Boynton W. V. Bruckner J. Squyres S. W. Bailey S. H. Clark P. E. Evans L. G. Floyd S. R. Starr R. Gold R. Goldsten J. McNutt R. The X-Ray/Gamma-Ray Spectrometer for the NEAR Mission Yeomans D. K.* Konopliv A. S. Barriot J. P. The NEAR Radio Science Investigation Acuna M.* Zanetti L. Russell C. Near Earth Asteroid Rendezvous Magnetometer (MAG) Investigation Zuber M. T.* Smith D. E. Cheng A. F. Cole T. D. The NEAR Laser Ranging Experiment Chapman C. R.* Near Earth Asteroid Rendezvous: Eros as the Key to the S-Type Conundrum Gaffey M. J.* Meteoritic Aspects of the S-Asteroid Issue: A Perspective for the NEAR-Mission Fanale F. P.* Granahan J. C. The 'Ordinary Chondrite--S Asteroid Controversy'; Still Going, Still Going Murchie S. L.* Pieters C. M. The Relation of 433 Eros to Other S Asteroids: Evidence from Reflectance Spectroscopy at 0.33-2.5 Micrometers Smith D. E.* Zuber M. T. Rowlands D. D. Deriving the Dynamics of Eros from Gravity Variations Bell J. F.* Q-Class Asteroids and Ordinary Chondrites Geissler P.* Petit J.-M. Greenberg R. Ejecta Reaccretion on Rapidly Rotating Asteroids: Implications for 433 Eros and 243 Ida Thursday, March 16, 1995 INTERPLANETARY DUST 1:30 p.m. Room A Chair(s): D. F. Blake J. F. Kerridge Liou J. C.* Zook H. A. Dermott S. F. Orbital Evolution of Micron-sized Dust Grains Coming from the Kuiper Belt Brownlee D. E.* Joswiak D. J. Schlutter D. J. Pepin R. O. Bradley J. P. Love S. G. Identification of Individual Cometary IDP's by Thermally Stepped He Release Bradley J. P.* Brownlee D. E. Keller L. P. Reflectance Spectra (from 380-800 Nanometers) of Interplanetary Dust Particles Rietmeijer F. J. M.* Magnesiusm Loss from Unmelted Stratospheric Interplanetary Dust Particles During Atmospheric Entry Engrand C. Maurette M.* Zolensky M. Kurat G. Walter J. Electron Microprobe Analyses of Antarctic Micrometeorites and Interplanetary Dust Particles Collected in the Stratosphere Bajt S.* Flynn G. J. Sutton S. R. Klock W. Comparison of Fe Oxidation States in Interplanetary Dust Particles and Matrix Fragments of Primitive Chondrites Stephan T.* Arndt P. Jessberger E. K. Maetz M. Reimold D. Walter J. Multielement Analysis of Antarctic Micrometeorites Using SEM, EDXA, EMPA, TOF-SIMS, and PIXE Thomas K. L.* Keller L. P. Clemett S. J. McKay D. S. Messenger S. Zare R. N. Hydrated Cluster Particles: Chemical and Mineralogical Analyses of Fragments from Two Interplanetary Dust Particles Flynn G. J.* Bajt S. Sutton S. R. Klock W. Chemical Composition of Large Stratospheric Dust Particles: Comparison with Stratospheric IDPs, Cluster Fragments, and Polar Micrometeorites Zolensky M. E.* Thomas K. Iron- and Iron-Nickel Sulfides in Chondritic Interplanetary Dust Particles Bradley J. P.* GEMS and Interstellar Silicate Grains Blake D. F.* Jenniskens P. The Metastable Persistence of Vapor-deposited Amorphous Ice at Anomalously High Temperatures Grady M. M.* Sexton A. Wright I. P. Drolshagen G. Morphology and Chemical Analyses of Residues from Impacts into MLI-Blankets on EURECA Thursday, March 16, 1995 VENUS GEOLOGY AND SURFACE PROPERTIES 1:30 p.m. Room B Chair(s): R. A. Brackett M. Bulmer Stofan E. R.* Coronae on Venus: Topographic Variations and Correlations Between Morphology and Regional Setting Tormanen T.* Kauhanen K. Topography and Morphology of Double-type Coronae on Venus from Magellan Data Janes D. L.* Squyres S. W. Lithospheric Control of Plateaus Above Venusian Diapirs Bulmer M. H.* Stofan E. R. Guest J. E. Phenomenology of Calderas on Venus Guest J. E.* Lancaster M. G. Copp D. L. Speculations on Lava Flow Textures on Venus Head J. W. III* Processes of Crustal and Depleted Mantle Layer Loss on Venus: Evidence from Basins in Tesserae, Uplands, and Plains Ori G. G.* Baker V. R. Geological Mechanisms of Resurfacing on Venus (Atalanta and Niobe Planitae, Atropos Tessera, Vesta and Ut Rupes) Bowman D. D.* Sammis C. G. Implications of Small-scale Fracturing on Guinevere Planitia, Venus Jankowski D. G.* Squyres S. W. Reliability of Magellan Altimetry: Evidence from a Stereo Digital Elevation Model Baron J. E.* Tyler G. L. Simpson R. A. Numerical Simulation of Scattering from Small-scale Surface Structure Brackett R. A.* Dielectric Properties of Venusian Impact Craters and Associated Deposits Sugita S.* Schultz P. H. Dynamical Evolution of Vapor Clouds by Oblique Impacts on Venus Cook C. M.* Melosh H. J. Bottke W. F. Jr. Doublet Craters on Venus Thursday, March 16, 1995 PLANETARY INTERIOR PROCESSES 1:30 p.m. Room C Chair(s): J. H. Jones J. J. Papike Holzheid A.* Palme H. The Partitioning of Ni and Co Between Metal and FeO-containing Silicate Melts Righter K.* Drake M. J. Yaxley G. Metal-Silicate Partition Coefficients for Siderophile Elements (Ni, Co, P, W and Mo) at 8, 15 and 70 kb, 1300-1750 Degrees C. Walter M. J.* Thibault Y. Effect of Pressure and Temperature on the Partitioning of Ni, Co, W and Mo Between Liquid-Silicate and Liquid-Metal Gaetani G. A.* Grove T. L. Partitioning of V, Cr, Mn, Co, Ni, and Cu Among Olivine, Silicate Melt and Sulfide Melt: Implications for Core Formation in the Terrestrial Planets Jurewicz S. R.* Jones J. H. Preliminary Results of Olivine/Metal Wetting Experiments and the Direct Measurement of Metal Phase Interconnectivity Eckhardt M. M.* Melt Segregation in Planetary Interiors: Evidence from the Brenham Pallasite McDonough W. F.* An Explanation for the Abundance Enigma of the Highly Siderophile Elements in the Earth's Mantle Kadik A. A.* Upper Mantle Oxidation and Evolution of Primary Metallic Phases Drake M. J.* Righter K. Hillgren V. J. Jones J. H. Treiman A. H. Core Formation in Mars Revisited Fowler G. W.* Shearer C. K. Papike J. J. SIMS Studies of Planetary Cumulates: Modeling Diogenite Petrogenesis Papike J. J.* Fowler G. W. McCallum I. S. Shearer C. K. SIMS Studies of Planetary Cumulates: Orthopyroxene from the Stillwater Complex, Montana. The Bronzitite/Norite Transition Ireland T. R.* McDonough W. F. Rb/Cs Archean Komatiite Glass Inclusions: A Common Rb/Cs in Earth and Moon, and Implications for Crustal Growth Woronow A.* Reid A. M. Jones J. H. Recovering Parental Magma Compositions: A Single-Blind Test of the Method and an Analysis of a Kilauean Parental Magma Thursday, March 16, 1995 ASTEROIDS, TOO 1:30 p.m. Room D Chair(s): E. S. Howell A. Storrs Sullivan R.* Greeley R. Pappalardo R. Belton M. Carr M. Chapman C. Greenberg R. Geissler P. Granahan J. Head J. Kirk R. McEwen A. Lee P. Thomas P. Veverka J. Morrison D. Moore J. Geology of 243 Ida Granahan J. C.* Fanale F. P. Carlson R. Kamp L. W. Klaasen K. P. Helfenstein P. Thomas P. McEwen A. S. Chapman C. Sunshine J. Belton M. J. S. Galileo NIMS Team SSI Instrument Team Galileo Multi-Instrument Spectral Observations of 243 Ida and Dactyl Oberst J.* Giese B. Wagner R. Jaumann R. Neukum G. Ohlhof T. Dorn M. Zeitler W. Ebner H. Gill E. Montenbruck O. Photogrammetric Evaluation of Galileo SSI Ida Images: Preliminary Results Greenberg R.* Geissler P. Bottke W. Nolan M. Petit J.-M. Durda D. Collisional History of Ida Britt D. T.* Kring D. A. Bell J. F. The Density/Porosity of Asteroids Clark B. E.* Compositional Spectral Mixing Models of S-Type Asteroids: 243 Ida and 951 Gaspra Zellner B. Storrs A.* Wells E. N. Images of Vesta with the Planetary Camera of the Hubble Space Telescope Hiroi T.* Vilas F. Characterization of Absorption Bands (0.6-0.9 micrometers) in Reflectance Spectra of Primitive Asteroids Howell E. S.* Rivkin A. S. Binzel R. P. Bus S. J. Spectral Observations of the Mars Trojan 5261 Eureka Kelley M. S.* Gaffey M. J. A Compositional and Morphological Study of Apollo Asteroid 4953 (1990MU) Bottke W. F. Jr.* Melosh H. J. Binary Asteroids: Progenitors of Doublet Craters Wood C. A.* Fevig R. Willman A. Wormer W. Are Hermes and 1988 XB Parent Bodies of HED Meteorites? Comparisons of Dates of Meteorite Falls and NEA Orbit Close Approaches Kiselev N. N.* Shakhovskoy N. M. Efimov Yu. S. On the Polarization Opposition Effect of E-type Asteroid 64 Angelina Thursday, March 16, 1995 PLANETARY SCIENCE EDUCATIONAL ACTIVITIES AND TECHNOLOGY 6:30 p.m. LPI Continued from Tuesday night Thursday, March 16, 1995 SHOEMAKER-LEVY 9 IMPACTS 6:30 p.m. LPI Schenk P. Asphaug E. McKinnon W. B. Benner L. A. M. Melosh H. J. Historical Examples of Tidally Split Comets: Crater Chains on Callisto and Ganymede Utyuzhnikov S. V. Konyukhov A. V. Numerical Simulation of Some Consequences Induced by the Comet SL-9 in the Jovian Atmosphere Moses J. I. Allen M. Gladstone G. R. Nitrogen and Oxygen Photochemistry at the Shoemaker-Levy 9 Impact Sites Thursday, March 16, 1995 PLANETARY INTERIOR PROCESSES 6:30 p.m. LPI LaTourrette T. Fahey A. J. Wasserburg G. J. The Effects of Ionic Radius and Charge on Diffusion of Mg, Ca, Ba, Ti, Zr, Nd, and Yb in Basaltic Melt Bills B. G. Lemoine F. G. Isotropy of Gravity and Topography on the Earth, Moon, Mars and Venus Tachi T. Horiuchi H. Nagasawa H. Cu Silicates: Synthesis, Crystal Structure Determination and Implication to the Partitioning Behavior of Transition Metal Ions in the Igneous Processes Capobianco C. J. De'Aro J. A. Drake M. J. Hillgren V. J. Metal-Silicate Partitioning of Sn: An Unusual Case Treiman A. H. Taylor G. J. Friedman R. Nakhla and Its Look-Alikes: Al-Depleted Magmas and Mantle Differentiation on Mars and the Earth Thursday, March 16, 1995 MORE ASTEROIDS 6:30 p.m. LPI Harris A. W. Young J. W. Poutanen M. Bowell E. Tholen D. J. Nicholson P. D. Photoelectric Lightcurves of 433 Eros Mottola S. De Angelis G. Di Martino M. Erikson A. Harris A. W. Hahn G. Neukum G. Pravec P. Wolf M. The EUNEASO Photometric Follow-up Program Wisniewski W. Z. Michalowski T. M. Harris A. W. McMillan R. S. Photoelectric Observations of 125 Asteroids Rivkin R. S. Lebofsky L. A. Three-Micron Spectra of Hydrated Asteroids Busarev V. V. Krugly Yu. N. A Spot of Hydrated Silicates on the M Asteroid 201 Penelope? Stooke P. J. Small Body Mapping Results - 1994 Cintala M. J. Horz F. Morris R. V. See T. H. Vilas F. The Response of Chondritic Targets to Impacts Thursday, March 16, 1995 PRIMITIVE PROCESSES 6:30 p.m. LPI Ivanov A. V. MacPherson G. J. Kononkova N. N. Zolensky M. E. Migdisova L. F. Unusual Inclusions in Metal of the Enstatite Chondrite Clast in Kaidun: Composition and Origin Zolensky M. E. Buchanan P. C. Evidence for Shock Melting and Parent Body Heating in CR and CV Chondrites Maurette M. Engrand C. Kurat G. 'Chemical' Search for Cometary Grains in Antarctic Micrometeorites Fomenkova M. N. Chang S. Chemical Evolution of Interstellar Dust into Planetary Materials Krot A. N. Scott E. R. D. Alteration of CV3 Carbonaceous Chondrites: Parent vs. Nebular Processes Zipfel J. Weinbruch S. Palme H. Ca in Olivine of H-Chondrites Skinner W. R. Could CAIs Have Survived as Small Objects in the Solar Nebula for a Million Years or More? Birjukov V. V. Ulyanov A. A. The Evidence of Multistage Origin of the Fine-Grained Refractory Inclusions in the Carbonaceous Chondrites Thursday, March 16, 1995 THE SHOCKING STORY 6:30 p.m. LPI Grieve R. A. F. Therriault A. M. Planar Deformation Features in Quartz: Target Effects Raitala J. Halkoaho T. Possible Post-Impact Metamorphosis in Impactite Garnet Koeberl C. Reimold W. U. Shock Metamorphism at the Red Wing Creek Structure, North Dakota: Confirmation of Impact Origin Fiske P. S. Hinsey N. Brookshaw L. Large-Scale Hypervelocity Impact Experiments Using the SHARP Gas Gun at Lawrence Livermore National Laboratory Hirata N. Kurita K. Sekine T. Shock Deformation and Melting in the Silicate-Metal Powder Mixture Rowan L. R. Horz F. Deciphering Projectile Compositions of Impact Craters via Shock Recovery Experiments on Simple Metal-Silcate Systems Gerasimov M. V. Yakovlev O. I. Dikov Yu. P. Belov G. V. Gerasimov V. M. Smirnov G. S. Hyper-Velocity Impact (7.4 km/s) into Basalt Target: Chemical Composition of Vapor Yakovlev O. I. Dikov Yu. P. Gerasimov M. V. Wlotzka F. High-Temperature Vaporization of Al-Silicates: Experimental Results Miura Y. Iancu G. O. Okamoto M. Compositional Changes of Planetary Bodies by Impact Processes Housen K. Fragment Velocities from Collisional Breakup Events Gayraud J. Robin E. Rocchia R. Froget L. Formation Conditions of Oxidized Ni-rich Spinel Graf Th. Caffee M. W. Rinkel R. C. Marti K. Nishiizumi K. Ponganis K. V. H-Chondrite Parent Break-up Seven Million Years Ago: One or More Events? Thursday, March 16, 1995 MICROMETEORITES AND COSMIC SPHERULES 6:30 p.m. LPI Taylor S. Lever J. Harvey R. A Micrometeorite Collector for the South Pole Water Well Xue S. Herzog G. F. Hall G. S. Bi D. Brownlee D. E. Stable Nickel Isotope Abundances in Type I Deep-Sea Spheres and in Nickel-rich Alberta (Canada) Spherules Vanderwood T. B. Bradley J. P. Maurette M. Petit J. R. Barkov N. I. Kurat G. Automated SEM-Search for Micrometer-Sized Antarctica Micrometeorites from East Antarctica (Dome B) Ice Core Samples Walter J. Brandstatter F. Kurat G. Koeberl C. Maurette M. Cosmic Spherules, Micrometeorites, and Chondrules Thursday, March 16, 1995 C & N 6:30 p.m. LPI Becker L. Bada J. L. Bunch T. E. PAHs, Fullerenes and Fulleranes in the Allende Meteorite Newton J. Grady M. M. Pillinger C. T. A New Member of the 'CH' Chondrite Group of Meteorites: Nitrogen and Carbon Stable Isotope Geochemistry of RKP 92435 Sephton M. A. Pillinger C. T. Gilmour I. Carbon Isotopic Measurements of Fragments of Meteoritic Macromolecule Produced by Hydrous Pyrolysis Sugiura N. Miura Y. Kiyota K. Zashu S. Hashizume K. Cosmogenic Nitrogen in Stony Meteorites Heymann D. Search for Extractable Fullerenes in Lunar Samples Thursday, March 16, 1995 TERRESTRIAL WEATHERING 6:30 p.m. LPI Wight M. J. Wright I. P. Pillinger C. T. Extensive Weathering in Type 3 Ordinary Chondrites from Frontier Mountain Bland P. A. Berry F. J. Pillinger C. T. Variation of Weathering with Depth: A Comparison Between the Great Bend Meteorite and LEW 85319 Bland P. A. Berry F. J. Pillinger C. T. Meteorites as Indicators of Paleoclimatic Conditions Jull A. J. T. Cloudt S. Cielaszyk E. Donahue D. J. 14C Terrestrial Ages and Weathering of Meteorites from the Allan Hills Region and Meteorite Hills, Antarctica Burbine T. H. Burns R. G. Fisher D. S. Binzel R. P. Analysis of Weathering in Antarctic H5 and CR Chondrites Using Mossbauer Spectroscopy Wolf S. F. Lipschutz M. E. Contents of Thermally Labile Trace Elements in and Weathering of Antarctic H4-6 Chondrites Thursday, March 16, 1995 ENSTATITE CHONDRITES 6:30 p.m. LPI Fogel R. A. Diopside in Equilibrated Enstatite Chondrites: EET90102--The First Diopside-bearing EL6 Chondrite Schneider D. M. Zhang Y. Sears D. W. G. Benoit P. H. Differences in the Metamorphic History of High Petrologic Type EH and EL Chondrites and the Luminescence Properties of Enstatite Zhang Y. Benoit P. H. Sears D. W. G. Natural Thermoluminescence Evidence for Major Differences in the Thermal History of EH and EL Chondrites Kinsey L. K. McCoy T. J. Keil K. Bogard D. D. Garrison D. H. Kehm K. Brazzle R. H. Hohenberg C. M. Mittlefehldt D. W. Casanova I. Petrology, Chemistry and Chronology of an Impact-Melt Clast in the Hvittis EL6 Chondrite Thursday, March 16, 1995 IMPACTS ON THE EARTH AND BEYOND 6:30 p.m. LPI Blumberg D. G. McHone J. F. Kuzmin R. Greeley R. Radar Imaging of Impact Craters by SIR-C/X-SAR Kinsland G. Hurtado M. Ceron A. Smythe W. Ocampo A. Pope K. New Gravity Data Over the Southwestern Portion of the Chicxulub Impact Feature, Yucatan Peninsula, Mexico Scott R. G. Pilkington M. Tanczyk E. I. Magnetic Studies of the Clearwater Lake Impact Structures Gurov E. P. Yamnichenko A. Yu. Morphology of Rim of Complex Terrestrial Craters Koeberl C. Reimold W. U. Anderson R. R. Kracher A. Origin of Impact Melt Breccias and Suevites in Drill Cores from the Manson Impact Structure Determined from Mixing Calculations Jolliff B. L. Korotev R. L. Rockow K. M. Haskin L. A. Manson Impact Structure: The Impact-Melt Component Miura Y. Okamoto M. Fukuchi T. Sato H. Kono Y. Furumoto M. Takamatsu Crater Structure: Preliminary Report of Impact Crater in Active Orogenic Region Master S. Robertson D. J. Stowe C. W. Walsh K. L. Reimold W. U. Brandt D. The Sinamwenda Structure- A Small New Meteorite Impact Crater in Triassic (Upper Karoo) Sandstones of Western Zimbabwe Degenhardt Jr. J. J. Reid A. M. Buchanan P. C. Miller R. McG. 'Melt' Breccias from the Roter Kamm Impact Crater, Namibia Wichman R. W. Crater Morphometry on Venus: Morphometric Trends in the Youngest Bright-Floored Craters Shevchenko V. V. Lunar Record of a Cometary Shower Povenmire H. The Georgia Tektite Strewn Field Albin E. F. Georgia Tektites: Stratigraphic Occurrence Revisited Palma R. L. Rao M. N. Rowe M. W. Source Materials for North American Tektites Glass B. P. Chapman D. R. Ablated Tektite from the Central Indian Ocean Gurov E. P. Gurova H. P. Yamnichenko A. Yu. The Structure of Complex Impact Craters and Estimation of Their Preservation Stage Thursday, March 16, 1995 FROM STARS TO MINERALS 6:30 p.m. LPI Meyer B. S. Parameterized Hydrostatic and Explosive Burning of Hydrogen, Helium, and Carbon Wasilewski P. J. Dickinson T. L. Nava D. F. O'Bryan M. V. Magnetic Properties of Bjurbole Chondrules Danielson L. R. Jones R. H. Experimental Reduction of Olivine: Constraints on Formation of Dusty Relict Olivine in Chondrules Chen M. Wopenka B. Xie X. El Goresy A. A New High-Pressure Polymorph of Chlorapatite in the Shocked Sixiangkou (L6) Chondrite Thursday, March 16, 1995 VENUS TECTONIC EVOLUTION 6:30 p.m. LPI Gilmore M. S. Head J. W. III Formation of Tessera Terrain on Venus: A Structural Analysis of Tellus Regio Tormanen T. Topographic and Stratigraphic Characteristics of Ridge Belts Associated with Tessera Boundaries on Venus: Examples from Northern Ovda Regio Margin and Kutue Tessera Riley K. M. Anderson R. C. Peer B. J. Lineament Analysis of Fortuna Tessera, Venus: Results from an Ongoing Study Basilevsky A. T. Compositional Heterogeneity and Late-Stage Deformation in Maxwell Montes, Venus Rosenberg L. Areal Geology of the Pandrosos Dorsa Quadrangle (V5), Venus Senske D. A. Rifting on Venus, Characteristics and Geologic Associations Chapman M. G. Relations Between Plate Movement and Phoebe Regio Tessera? Jackson E. Brown C. D. Grimm R. E. Rifting and Corona Formation in Eastern Aphrodite Terra, Venus Ghail R.C. Dali Vinculum: Rifting, Coronae and Subduction Grosfils E. B. Head J. W. III Giant Radiating Dike Swarms: Evidence for the Nature of a Global Resurfacing Event on Venus Herzog S. G. Hess P. C. Parmentier E. M. Constraints on the Basalt to Eclogite Transition and Crustal Recycling on Venus Head J. N. Swindle T. D. Argon Diffusion: Implications for Meteorites from Venus and Mercury and for Venus Outgassing History Rosenblatt P. Pinet P. C. Hypsometry as an Investigative Tool of the Lithospheric Structure and Tectonic Style of Venus Monnereau M. Rosenblatt P. Pinet P. C. 3D Spherical Convective Models of Venus Malcuit R. J. Winters R. R. Numerical Simulation of Retrograde Gravitational Capture of a Satellite by Venus: Implications for the Thermal History of the Planet Thursday, March 16, 1995 VENUS VOLCANISM 6:30 p.m. LPI Garvin J. B. Frawley J. J. Mathematical Modelling of Solar System Volcanoes Edmunds M. S. A Geologic Analysis of Sekmet Mons, Venus, Using Magellan Radar Data McGovern P. J. Solomon S. C. Factors Affecting the Growth, Development, and Structure of Large Volcanoes on Venus Langdon J. C. Komatsu G. Baker V. R. Longitudinal Profiles of Sinuous Rilles on Venus Bridges N. T. Ambient Effects on Basalts and Rhyolites on Venus and Earth Smith D. K. Cann J. R. Comparison of Sizes, Shapes, and Morphologies of Submarine Volcanoes and Volcanoes on Venus Stofan E. R. Crown D. A. Anderson S. W. Plaut J. J. Surface Morphology of Steep-Sided Domes on Venus: Implications for Emplacement History Bretschger O. Lisi M. McGinley C. F. Tucker B. V. Lockwood J. F. Elevation Distribution, Diameter, Morphology of Small Volcanic Edifices on Venus Between Guinevere Planitia and Sedna Planitia Sahuaro HS Astro. Res. Class Lockwood J. F. Johnson J. Komatsu G. Morphology, Diameter, and Elevation Distribution of Small Volcanic Edifices on Venus between Phoebe and Ulfrun Regio Gerlach K. A. Fosse A. A. Ellison M. Johnson J. Komatsu G. Correlations of Small Volcanic Edifices in Association with Geologic Features by Class, Density, Elevation, and Geologic Feature Diameter on the Surface of Venus Aubele J. C. Stratigraphy of Small Volcanoes and Plains Terrain in Vellamo Planitia-Shimti Tessera Region, Venus Thursday, March 16, 1995 SURFACE PROCESSES AND IMPACT CRATERING ON VENUS 6:30 p.m. LPI Simpson R. A. Maurer M. J. Tyler G. L. Application of the Magellan GVDR to Venus Surface Studies Palazzari G. M. Brackett R. A. Arvidson R. E. Nature of the Low Emissivity Highlands on Venus Inferred From the Analysis of Magellan Data: Sapas, Maat and Ozza Montes Kreslavsky M. A. Venera-15, -16 Radar Brightness of Venus Surface: Comparison with Magellan Data Zahnle K. Simulated Craters on Venus You J. Kauhanen K. Raitala J. Fractality of Venusian Ejecta Outflows Johnson J. R. Gaddis L. VFLOW: A Computer Model for the Movement of Gravity Flows Over Venus Topography Kirk R. L. Schaber G. G. New Statistical Results on the Spatial Distribution and Physical Properties of Impact Craters on Venus Thursday, March 16, 1995 SURFACE PROCESSES 6:30 p.m. LPI Michaels G. Greeley R. Lo E. Scale-dependent Characterization of Volcanic Flow Margins Prockter L. M. Head J. W. Wilson L. Smith D. K. Emplacement of Volcanic Deposits on Mid-Ocean Ridges: Venus Comparisons Matsui T. Tajika E. Comparative Study of Crustal Production Rates of Mars, Venus and the Earth Wu C. Y. R. Chen F. Judge D. L. Tan K. Total Electron Yields and Total Fluorescence Yields of Albite and Lunar Soil Simulants JCS-1 and MLS-1 Thursday, March 16, 1995 DISCOVERY 6:30 p.m. LPI Rieder R. Wanke H. Gromov V. Kemurdjian A. Kucherenkov V. Sologub P. Andreichikov B. Kalyushniy A. Korchuganow B. Linkin V. Kankeleit E. Klingelhofer G. Foh J. Held P. Teucher R. Prilutzkii O. Evlanov E. Khromov V. Zubkov B. Economu T. Neukum G. Hoffmann H. Michaelis H. Ress E. Langfeld M. Jakes P. Hoerner H. v. Henkel H. Nanokhod: A Miniature Instrument Deployment Device with Instrumentation for Chemical, Mineralogical and Geological Analysis of Planetary Surfaces, for Use in Connection with Fixed Planetary Surface Stations Schmitt H. H. Griffin M. D. Kulcinski G. L. Shoemaker E. M. Interlune-One: A Scientific Mission Across the Surface of the Moon Russell C. T. Abshire J. A'Hearn M. Alexander C. Konopliv A. Metzger A. Arnold J. Berthelier J. Elphic R. Hickman M. Palac D. Jaumann R. Neukum G. McCord T. Phillips R. Pieters C. Purdy W. Rosenthal R. The Diana Discovery Mission: A Solar Electric Propulsion Mission to the Moon and a Comet Thursday, March 16, 1995 INTERPLANETARY DUST 6:30 p.m. LPI Flynn G. J. Thermal Gradients in Interplanetary Dust Particles: The Effect of an Endothermic Phase Transition Kurat G. Koeberl C. Brandstatter F. Walter J. Maurette M. On the Terrestrial Dust Component in the Ice at Cap Prudhomme, Antarctica Christoffersen R. McKay D. S. Computer Simulation of Ion Radiation Damage in Silicates: Applications to Particle Rims and Formation of 'GEMS' in IDPs Zook H. A. Grun E. Baguhl M. Hamilton D. Linkert G. Siddique N. Forsythe R. Phillips J. L. 'Bursts' of Dust from the Jovian System Rietmeijer F. J. M. An Analytical Electron Microscope (AEM) Study of Hydrous Alteration of Amorphous Magnesiosilica Smokes Dahl J. M. Zolensky M. E. Sapp C. A. Burkett P. J. Porosity Determinations in Interplanetary Dust Particles and Primitive Meteorites Mendez D. J. Ryder J. T. Nishioka K. Carl G. Bunch T. Hypervelocity Particle Capture in Ultra-Pure Aerogel Thonnard N. Resonance Ionization: Potential Application of Few-Atom Detection Techniques to Inter-Planetary Dust Particle and 'Stardust' Studies Friday, March 17, 1995 CARBONACEOUS CHONDRITES 8:30 a.m. Room A Chair(s): A. Brearley T. D. Swindle Brearley A. J.* Bajt S. Sutton S. R. Distribution of Moderately Volatile Trace Elements in Fine-grained Chondrule Rims of Metamorphosed CO3 Chondrites Browning L. B.* McSween H. Y. Zolensky M. Parent Body Alteration Features in CM Rims Woolum D. S.* Kehm K. Hohenberg C. M. Poelstra K. Guntalilib E. CM Rims: In Situ Rare Gas Analysis of Murchison Peters M. T.* Baker M. B. Burnett D. S. The Partitioning of Iodine Between Sulfide Liquid and Silicate Liquid: Implications for the Cosmochemistry of Iodine Brazzle R. H.* Kehm K. Hohenberg C. M. Gopel C. Swindle T. D. Davis A. M. MacPherson G. I-Xe Chronometry: Crock or Clock? A Program to Test and Interpret the I-Xe System Nakamura T.* Nagao K. Takaoka N. Primordial Noble Gas-Rich Component in the CM Chondrites: Implications for the Site of Phase Q Benoit P. H.* Symes S. J. K. Guimon R. K. Sears D. W. G. The CV Chondrites: Metamorphism, Thermal History, and Their Relationship to CK Chondrites Hua X.* Zinner E. K. Buseck P. R. Fine-Grained Dark Rims and Matrix in the Mokoia CV3 Chondrite Assonov S. S.* Ivanova M. A. Shukolyukov Yu. A. Noble Gases in the Chondrites El Djouf 001 (CR) and Acfer 214 (CR-like): Evidence for Possible Redistribution of Gases Cooper G. W.* Chang S. Isotopic Measurements of Organic Sulfonates from the Murchison Meteorite Thiemens M. H.* Jackson T. Further Measurements of Sulfur Isotopes in Ureilites: Evidence for a 33S Isotopic Anomaly Beckerling W.* Bischoff A. Mineralogy of Micrometeorites from Greenland and Antarctica: Indications for their Asteroidal Origin Friday, March 17, 1995 VOLCANISM AND LAVA FLOWS 8:30 a.m. Room B Chair(s): C. R. Coombs L. Keszthelyi Kieffer S. W.* Valentine G. A. Numerical Models of Caldera-scale Volcanic Eruptions on the Earth, Venus, Mars, Triton and Io Sakimoto S. E. H.* Baloga S. M. Thermal Controls on Tube-fed Planetary Lava Flow Lengths Hanley D.* Zimbelman J. R. Topographic Control of Lava Flow Emplacement: Earth, Mars, and Venus Baloga S. M.* Crown D. A. A Stochastic Approach to the Emplacement of Pahoehoe Lava Flows Crown D. A.* Baloga S. M. Characteristics of Pahoehoe Flows and Implications for the Emplacement of Compound Lava Flow Fields Coombs C. R.* Taylor G. J. Rowland S. K. The Formation and Evolution of Lava Tubes Parfitt E. A. Wilson L.* Head J. W. Maximum Lengths of Channelised Lava Flows on Earth, Venus and Mars Keszthelyi L.* Thermal Constraints on the Lengths of Tube-Fed Lava Flows on the Earth, Moon, Mars, and Venus Gregg T. K. P.* Fink J. H. Quantification of Extraterrestrial Lava Flow Through Analog Experiments Bruno B. C.* Taylor G. J. Morphologic Identification of Venusian Lavas: Implications for Emplacement of Long Lava Flows Friday, March 17, 1995 SHOEMAKER-LEVY 9 IMPACTS 8:30 a.m. Room C Chair(s): T. Takata P. Schenk Weissman P. R.* Carlson R. W. Hui J. Segura M. Smythe W. D. Baines K. H. Johnson T. V. Drossart P. Encrenaz T. Leader F. Mehlman R. Galileo NIMS Direct Observation of the Shoemaker-Levy 9 Fireballs and Fall Back Consolmagno G. J.* Menard G. Stoll C. P. Possible Light Echoes During the SL/9 A, H, and Q Impacts Crawford D. A.* Boslough M. B. Robinson A. C. Trucano T. G. Dependence of Shoemaker-Levy 9 Impact Fireball Evolution on Fragment Size and Mass Takata T.* Ahrens T. J. Physical Properties of Comet Shoemaker-Levy 9: Origin and Progenitor Size Asphaug E.* Benz W. The Tidal Evolution of Strengthless Planetesimals McKinnon W. B.* Benner L. A. M. Schenk P. M. Constraining the Density of Comets from Crater Chains on Callisto and Ganymede Moses J. I.* Allen M. Gladstone G. R. Sulfur Photochemistry at the Shoemaker-Levy 9 Impact Sites Takata T.* Ahrens T. J. Fragment and Progenitor Energy of Comet Shoemaker-Levy 9 and Frequency of Such Impact Events Chapman C. R.* Morrison D. Implications of the Jupiter Comet Crash for the Earth Impact Hazard TITLE-ONLY PAPERS Alexeev V. A. Catastrophe in the Space: 500 or 300 Myr Ago? Alexeev V. A. Gorin V. D. Radioactivity of Dengli Meteorite Alexeev V. A. Kuyunko N. S. Some Regularities of Cosmic-Ray Exposure Age Distribution of H-Chondrites of Different Shock Classes Alexeev V. A. Ustinova G. K. Effects of Cosmic Ray Variations in Radioactivity of Meteorites with Different Exposure Ages Arai T. Takeda H. Exotic Components in Lunar Breccia Yamato 793274 Aubele J. C. Crumpler L. S. Fayyad U. M. Smyth P. Burl M. C. Perona P. Locating Small Volcanoes on Venus Using a Scientist-Trainable Analysis System Badjukov D. D. Dikov Yu. P. Petrova T. L. Pershin S. V. Shock Behavior of Calcite, Anhydrite, and Gypsum Badjukov D. D. Petrova T. L. Pershin S. V. Impact-induced Redox Reactions of Silicates with Metal Iron Bernhard R. P. Hannigan B. J. Horz F. Depth/Diameter Ratios of LDEF Microcraters: Implications for Physical Properties of Natural and Orbital Debris Particles Bland P. A. Berry F. J. Pillinger C. T. Weathering Effects in the Axtell, CV3 Carbonaceous Chondrite Bogard D. D. 39Ar-40Ar Ages of Two Shocked L Chondrites Borisov A. Palme H Metal/Silicate/Sulfide Partitioning of Highly Siderophile Elements (HSE) as Derived from Recent Solubility Data Brakenridge G. R. A Candidate Spreading Center in Western Atla Regio, Venus Burba G. A. Oymyakon Ring Structure in the North-Eastern Siberia: One more Terrestrial Counterpart of Coronae on Venus Burgess K. M. Horz F. Zolensky M. E. See T. H. Hypervelocity Particle Fluxes in Low-Earth Orbit Derived from Craters and Penetration Holes in LDEF Thermal Blankets Burt J. D. Head J. W. Parmentier E. M. The Role of Crustal Instability in Crustal Recycling on Venus Chambers J. G. Snyder G. A. Taylor L. A. Neal C. R. Enigmatic Major- and Trace-Element Chemistry of Some KREEPy to Super-KREEPy Mg-rich Highland Rocks Chambers J. G. Taylor L. A. Patchen A. McKay D. S. True Modal Analyses of Lunar Mare Soils: X-Ray Digital-Imaging Clark P. E. Smyth W. Potassium and Sodium Abundances on the Lunar Surface: Implications for Atmospheric Composition Cloutis E. A. Coal Reflectance Spectra: Particle Size Effects and Implications for Asteroid Spectroscopy Cloutis E. A. Spectral Reflectance Properties of Lichens: Implications for Biological Spectroscopic Exploration of Mars Cloutis E. A. Gaffey M. J. Moslow T. F. A Search for Metalloporphyrin Absorption Features in the Reflectance Spectra of Oil Sands: Implications for Asteroid Spectroscopy Copp D. L. Guest J. E. Geology of the V31 SIF and Gula Quadrangle of Venus Crowe D. G. Britt D. T. Venus Lander Power Generation by Infrared Photovoltaic Conversion Crumpler L. S. Geologic Mapping Traverse of Xanthe Terra to Chryse Planitia: Viking Lander 1 and Mars Pathfinder Region Davis P. A. Tanaka K. L. Curvilinear Ridges in Isidis Planitia, Mars--The Result of Mud Volcanism DeHart J. M. Lofgren G. E. Formation and Metamorphism in Enstatite Chondrites Edgett K. S. K-12 Teacher Workshops in Planetary Science: Some Lessons Learned Engrand C. Maurette M. Antarctic Micrometeorites (AMMs): Search for Correlation Between C/O Ratios and Elemental Abundances on a Scale of 100 Nanometers Eugster O. James O. B. Thalmann Ch. On the Origin of the Apollo-16 Dimict Breccias Fisenko A. V. Tatsy V. F. Semjonova L. F. Bol'sheva L. N. Experimental Studies of Oxidation Kinetics of the Meteoritic Diamonds by Air Oxygen Glukhovsky M. Z. Moralev V. M. Plume Tectonics of Venus and the Early Earth Golombek M. P. Davis P. A. Branerdt W. B. Franklin B. J. Extension Across Tension Cracks and Tensile Strength of Shallow Crustal Materials on Mars Grant J. A. Planetary Science Education for Pre- and In-Service Teachers in RI: Defining Little Rhody's Place in the Solar System Grant J. A. Schultz P. H. Further Constraints on the Erosional Evolution of the Ejecta at Meteor Crater, Arizona, as Revealed by Ground Penetrating Radar Greshake A. Klock W. Arndt P. Maetz M. Bischoff A. Volatile Element Abundances in Micrometeorites: Evidence for the Loss of Copper, Germanium, and Zinc During Atmospheric Entry Heating Greshake A. Klock W. Flynn G. J. Bajt S. Bischoff A. Flash-Heating of Pyrrhotite from Orgueil (CI): Evidence for the Loss of Sulphur and Selenium during Atmospheric Entry Heating of Polar Micrometeorites Grosfils E. B. Head J. W. III Giant Radiating Dike Swarms on Venus: Stratigraphic Constraints upon Their Time of Emplacement Hackbarth K. Stoffler D. Infrared and Electron Spin Resonance Spectroscopic Studies on Experimentally Shocked Calcite Hahn J. M. Ward W. R. Resonance Passage Via Collisions Hawke B. R. Peterson C. A. Lucey P. G. Coombs C. R. Spudis P. D. Remote Sensing Studies of the Grimaldi Region of the Moon Head J. W. III Formation and Evolution of Tessera Terrain on Venus: Outstanding Problems Head J. W. III Geologic Evidence for Onset, Distribution, Diversity and Duration of Lunar Mare Basalt Volcanism: Implications for Petrogenetic Models and Thermal Evolution Head J. W. III Tectonic Facies in Venus Tessera Terrain: Classification and Interpretation of Sequence of Deformation Hervig R. L. Steele I. M. Oxygen Isotopic Microanalysis of Isolated Forsterites From Ornans (C30) and Murchison (C2) Heymann D. Search for Extractable Fullerenes in the Allende Meteorite Higgins S. J. Taylor L. A. Patchen A. Chambers J. G. McKay D. S. X-Ray Digital-Imaging Analysis: Requisite Data for Spectral Reflectance Studies Ipatov S. I. Migration of Small Bodies to the Earth Ivanov M. A. Head J. W. Sequence of Events in Tessera Formation, Northern Ovda Regio, Venus Ivliev A. I. Badjukov D. D. Kashkarov L. L. Thermoluminescence Measurements in Shocked Oligoclase Johns G. W. Dressler B. O. The Sudbury Igneous Complex--An Impact Melt Sheet? Johnston T. Lofgren G. E. Relative Abundances of Chondrule Textural Types in E3 Chondrites Jolliff B. L. Wopenka B. Zinner E. Kremser D. T. A Zoned Lunar Zircon in a Quartz-Monzodiorite Breccia from Apollo 14: U, Th, Other Trace Elements, and Raman Spectral Parameters Jons H.-P. A Fossil Linear Zone of Weakness Beneath the Kasei Valles, Mars? Kaplan D. I. Mars ISRU Sample Return (MISR)--A Mission Overview Kashkarov L. L. The Early Radiation-Thermal History Model for the Ordinary Chondrite Formation by Track Data Kochemasov G. G. Ring Structures and Degassing Features on Asteroid Ida Koeberl C. Reimold W. U. Dallmeyer R. D. Powell R. A. Petrology, Mineralogy, Geochemistry, and Age of Impact Melt Rocks From the Ames Structure, Oklahoma Korotev R. L. Geochemical Stratigraphy of the Apollo 15, Apennine Front Core (15007/8) Korotev R. L. Morris R. V. Geochemistry and Maturity of Soil from Apollo 16 Double Drive Tube 68001/2 Korotev R. L. Rockow K. M. Compositional Trends in Apollo 12 Soils Korotev R. L. Jolliff B. L. Rockow K. M. Haskin L. A. Preliminary Compositional and Petrographic Examination of Lunar Meteorite QUE 93069 Korotev R. L. Rockow K. M. Jolliff B. L. Relation of 2-4 mm Regolith Breccias to the Local Soil at Apollo 17 Korotkova N. N. Kashkarov L. L. VH-Nuclei Cosmic-Ray Track Study in Plagioclase Crystals from Erevan Howardite Individual Clasts and Inclusions Kunz J. Bollinger K. Jessberger E. K. Storzer D. Ages of Australasian Tektites Kuskov O. L. Sidorov Yu. I. Shapkin A. I. Composition of the Lower Mantle and Origin of the Moon from Interstellar Dust Kuzmin R. O. Gektin Y. M. Selivanov A. S. Christensen P. R. Noss D. Mars: Comparative Analysis of Termoscan and Viking-IRTM Data LaFave N. L. Wilson T. L. Lunar LIGO and the Study of Astrophysical Phenomena Lange J.-M. Bollinger K. Horn P. Jessberger E. K. Schaaf P. Storzer D. Moldavites from Lusatia (Germany) III: Sr-Isotope-, 40Ar/39Ar-, and Fission Track-Studies Lange J.-M. Knuth G. Wagner H. Moldavites from Lusatia (Germany) I: Occurrences and Geology of Their Host Sediments Lavrukhina A. K. On Nature of Chromium Isotope Anomalies in Meteorites Lindstrom D. J. Martinez R. R. A Search for Luna 20 Basalts Lingemann C. M. Stoffler D. Green and Brown Ringwoodite in L-Chondrites of the Sahara Lucchitta B. K. Kasei Valles, Mars (1); The Water Story Maharaj S. V. Hewins R. H. Flash Heating a Type B CAI Composition Malysheva T. V. Redox Fractionation Among Chondrites: Mossbauer Study Marchenko A. G. Age Relationship Between Plains South of Lakshmi Planum Marzari F. Vanzani V. Weidenschilling S. Davis D. Disruption and Reaccumulation of Miranda Masaitis V. L. Mashchak M. S. Terrestrial Analogs of Lunar Granulites Maurette M. Engrand C. Brack A. Kurat G. Leach S. Perreau M. Carbonaceous Phases in Antarctic Micrometeorites and Their Mineralogical Environment. Their Contribution to the Possible Role of Micrometeorites as 'Chondritic Chemical Reactors' in Atmospheres, Waters and/or Ices McCallum I. S. O'Brien H. E. Lunar Crustal Stratigraphy Inferred from Cooling Rate Studies of Exsolved Pyroxenes Mendez D. Ryder J. T. Nishioka K. Carl G. Bunch T. Simulated IDP Track Entrainment of Surface Contaminated Capture Media Metzler K. Aqueous Alteration of Primary Rock on the CM Parent Body Mitchell J. N. Snyder G. A. Taylor L. A. Petrology of Two New Ferroan Anorthosites and Six Apollo 11 Basaltic Rock Fragments Mitchell J. N. Snyder G. A. Taylor L. A. Beard B. L. Petrology and Chemical Composition of a Suite of Apollo 16 Impact-Melt Breccias Miyamoto M. Raman Spectra of Diamonds in the Canyon Diablo Iron Meteorite Murty S. V. S. Mohapatra R. K. Clement C. J. Nitrogen and Noble Gas Components in the Martian Orthopyroxenite ALH84001 Nazarov M. A. Brandstatter F. Kurat G. A New Type of Carbonaceous Chondrite Matter From the Erevan Howardite Nazarov M. A. Brandstatter F. Kurat G. Angrite-Like Clasts From the Erevan Howardite Newman W. I. Ahrens T. J. Blast Waves and the Blow-off Effect in Terrestrial Atmospheres Nikolaeva O. V. Tholeitic Basalts of Venus as Compared to Normal Mid-Ocean Ridge Basalts of Earth in Terms of K-U-Th Systematics Nishiizumi K. Finkel R. C. Caffee M. W. Reedy R. C. Solar Cosmic Ray Records in Meteorites Nyquist L. E. Takeda H. Bogard D. D. Bansal B. M. Wiesmann H. Shih C.-Y. Formation and Impact-Metamorphic Ages of Monomict Type 6 Eucrite Y792510 Parfitt E. A. Wilson L. Modelling the Maximum Lengths of Channel-fed Lava Flow Fields Pepin R. O. Are Isotopically Solar Components Present in Heavy Noble Gases from Terrestrial Mantle Samples? Perhaps . . . Peterson C. A. Impact Cooling of a Magma Ocean Pinkerton H. Herd R. A. Kent R. M. Wilson L. Field Measurements of the Rheological Properties of Basaltic Lavas Povenmire H. The Sylacauga, Alabama Meteorite: The Impact Locations, Atmosphere Trajectory, Strewn Field and Radiant Reimold W. U. von Brunn V. Koeberl C. No Evidence of Shock Metamorphic Effects in Clasts in Late Paleozoic Dwyka and Late Archean Mozaan Diamictites from Southern Africa Rietmeijer F. J. M. Thiel K. On the Possibility of Phyllosilicate Alteration in the KOSI-2 Comet Simulation Experiment Sahijpal S. Nazarov M. A. Goswami J. N. Sulfur Isotopic Studies of a P-rich Sulfide in a Carbonaceous Xenolith from the Erevan Howardite Sasaki S. Surface Properties of Phobos/Deimos and Formation of Self-Sustained Martian Dust Torus Sato K. Miyamoto M. Infrared Diffuse Reflectance Spectra of Binary Mixtures of Olivine, Enstatite and Plagioclase Sazonova L. Feldman V. Korotaeva N. Transformation Conditions of Plagioclase and Dark-Colour Minerals from Puchezh-Katunki Astrobleme Rocks Schaber G. G. Kirk R. L. Strom R. G. Update on the USGS Impact Crater Database for Venus Schmitt R. T. Deutsch A. X-ray Investigation of Olivine and Orthopyroxene in Experimentally Shocked Samples of the H6-Chondrite Kernouve Schultz R. A. Watters T. R. Elastic Buckling of Fractured Basalt: Case Study of the Columbia Plateau, Earth, Using an Improved Strength Criterion See T. H. Patrick H. D. Warren J. L. Zolensky M. E. Johnson Space Center Meteoroid and Debris Data, Database and Access over the Internet Sharma M. Papanastassiou D. A. Wasserburg G. J. Sm-Nd Systematics of a Large Eucrite Clast in the Vaca Muerta Mesosiderite and Initial Solar System 146Sm Abundances Shearer C. K. Papike J. J. Layne G. D. The Role of Ilmenite in the Source Region for Mare Basalts: Evidence from Nb and Zr in Picritic Glasses Shih C.-Y. Nyquist L. E. Wiesmann H. Iron Isotopes in Chainpur Chondrules Snyder G. A. Chambers J. D. Taylor L. A. Another Sortie for Pristine Rocks at Mare Tranquillitatis: Chemistry of 1-4 mm Basaltic Fragments in Soil 10085,1161 Snyder G. A. Neal C. R. Taylor L. A. Halliday A. N. Mantle Sources of Lunar Volcanism in the Ocean of Storms: Evidence from Trace-Element and Nd Isotopic Chemistry of Fine-Grained Basalts at Apollo 12 Steele I. M. Lewis R. S. Amari S. Cathodoluminescence and Minor Elements in Murchison SiC Grains Sugiura N. Zashu S. Nitrogen, Neon and Argon in the PCA91467, An ALH85085-Like Chondrite Suthar K. M. Clement C. J. Murty S. V. S. Bhandari N. Cosmogenic Effects in Mbale Chondrite Therriault A. M. Grantz A. Planar Deformation Features in Quartz Grains from Mixed Breccia of the Avak Structure, Alaska Tyburczy J. A. Ahrens T. J. Xu X. Epstein S. Shock-induced Devolatilization and Isotopic Fractionation of H from Murchison Meteorite, Possible Implication for Atmospheric Accretion Ustinova G. K. 53Mn Evidence on a Scenario of Forming the Solar System Ustinova G. K. On the Problem of Be and B Generation in the Solar System Ustinova G. K. Alexeev V. A. Pre-Atmospheric Sizes and Orbits of Some Recently Fallen Chondrites Wang H. Li Y. Zhang F. Lin C. SEM Studies on the Chemical and Petrologic Features of Taizhou (L-5) Chondrite in China Watters T. R. Schultz R. A. Rock Mass Strength Criterion Applied to Ridged Plains on Mars: Implications for Elastic Buckling Weber D. Schirmeyer S. Bischoff A. Refractory Inclusions from the CH-Chondrite PCA 91467: Similarities with and Relationship to Inclusions from ALH 85085 and Acfer 182 Wentworth S. J. Basu A. McKay D. S. Sieving the Finest Fractions of Lunar Soils Weidenschilling S. J. Can Gravitational Instability Form Planetesimals? Wilson T. L. Antimatter on the Moon Wilson T. L. Svoboda R. C. Monte Carlo Production of Neutrinos on the Moon Wright I. P. Grady M. M. Pillinger C. T. An Interpretation of 14C Measurements of Weathering Products in SNC Meteorites Yoneda S. Simon S. B. Grossman L. Chemical Compositions of Refractory Inclusions in Axtell, A CV3 Chondrite of the Oxidized Subgroup Yugami K. Takeda H. Miyamoto M. The Shapes of Opaque Grains of Primitive Achondrites and the Differentiation of Primitive Achondrites Zakharov A. V. Erosion of Martian Atmosphere According to Plasma Experiments Data Zolotov M. Yu. A Model of the Venus Atmosphere Evolution Along With Titanhematite-Magnetite-Pyrite Buffer Zolotov M. Yu. Phase Relations in the Fe-S-O System: Titanhematite-Magnetite-Pyrite Equilibrium as a Buffer of Venus Atmospheric Composition Zolotov M. Y. Temporal Changes of Carbonates Stability on the Venus Surface