Monday, March 16, 1992 MAGELLAN AT VENUS: THE GLOBAL PERSPECTIVE EMERGES 8:30 a.m. Room A Chair(s): R. E. Arvidson R. S. Saunders Solomon S. C.* Smrekar S. E. Bindschadler D. L. Grimm R. E. Kaula W. M. McGill G. E. Phillips R. J. Saunders R. S. Schubert G. Squyres S. W. Stofan E. R. Venus Tectonics: An Overview of Magellan Observations Suppe J.* Connors C. Linear Mountain Belts and Related Deformation on Venus Schubert G.* Mantle Dynamics and Tectonics on Venus Schaber G. G.* Moore H. J. Strom R. G. Boyce J. M. The Uniform Distribution but Nonuniform Modification of Impact Craters on Venus Phillips R. J.* Herrick R. R. Grimm R. E. Raubertas R. F. Sarkar I. C. Arvidson R. E. Izenberg N. The Resurfacing History of Venus: Constraints from Impact Crater Distribution Head J. W.* Crumpler L. S. Aubele J. C. Venus Global Volcanism: Characteristics and Distribution of Edifices and Deposits and Implications for Resurfacing Style and Rates Arvidson R. E.* Greeley R. Malin M. Saunders R. S. Izenberg N. Plaut J. J. Stofan E. Surface Modification of Venus as Inferred from Magellan Observations of Plains and Tesserae Wood J. A.* Venus: Surface Chemistry and Modification Processes Baker V. R.* Komatsu G. Gulick V. C. Kargel J. S. Venusian Valleys and Channels Saunders R. S.* Stofan E. R. Science Questions for the Magellan Continuing Mission Monday, March 16, 1992 METEORITE PARENT BODIES 8:30 a.m. Room B Chair(s): A. Graham E. Scott Haack H.* Taylor G. J. Scott E. R. D. Keil K. Thermal History of Chondrites: Hot Accretion vs. Metamorphic Reheating Steele I. M.* Olivine Zoning as Function of Crystallographic Orientation; Implications for Diffusion in Olivine Burkland M. K.* Swindle T. D. Studies of the Diffusion Properties of the I-Xe System in Bjurbole Benoit P. H. Sears D. W. G.* The Break-up of the H Chondrite Parent Body and the Delivery of Fragments to Earth Fujiwara T. Nakamura N.* Additional Evidence of a Young Impact-Melting Event on the L-Chondrite Parent Body Perron C.* Bourot-Denise M. Inclusions in the Metal of Tieschitz and Krymka Rubin A. E.* Petrography of Metallic Cu in Ordinary Chondrites Brearley A. J.* Phyllosilicates in the Matrix of the Unusual Carbonaceous Chondrite, LEW 85332 and Possible Affinities to CI Chondrites Graham A. L.* Lee M. The Matrix Mineralogy of the Vigarano (CV3) Chondrite Llorca J.* Brearley A. J. Alteration of Chondrules in ALH 84034, an Unusual CM2 Carbonaceous Chondrite Zolensky M. E.* Weisberg M. K. Buchanan P. C. Prinz M. Reid A. Barrett R. A. Mineralogy of Dark Clasts in CR Chondrites, Eucrites and Howardites Xiao X. Lipschutz M. E.* Carbonaceous Chondrites: Co-Variation of Volatile Element Contents and Siderophile Element Ratios in Petrographic Types 2-6 Yanai K.* Bulk Composition of Yamato-793575 Classified as Carlisle Lakes-type Chondrite Monday, March 16, 1992 MARE BASALTS, KREEP, AND COPERNICAN EJECTA 8:30 a.m. Room C Chair(s): C. K. Shearer G. A. Snyder Marvin U. B.* Holmberg B. B. Highland and Mare Components in the Calcalong Creek Lunar Meteorite Boesenberg J. S.* Delaney J. S. Lithic Clasts in Elephant Moraine 87521 Sample Two VLT Fractionation Series James O. B.* McGee J. J. Compositional Variations in Mare-Basalt Plagioclase Produced by Differing Crystallization Regimes Jerde E. A.* Snyder G. A. Taylor L. A. Apollo 11 High-K Basalts: An Apollo 17 Connection and Evidence for neoKREEP Snyder G. A.* Jerde E. A. Taylor L. A. Lee D.-C. Halliday A. N. Isotopic Constraints on the Lunar Upper Mantle: Evidence from High-Ti Basalts Misawa K.* Tatsumoto M. Yanai K. U-Th-Pb, Sm-Nd, and Rb-Sr Isotopic Systematics of Lunar Meteorite Asuka-31 Shearer C. K.* Papike J. J. Relationship Between Apollo 12 High-Ti, Red-Picritic Glass and High-Ti Basaltic Magmatism Neal C. R.* Hacker M. D. Taylor L. A. Schmitt R. A. Liu Y.-G. The Petrogenesis of Apollo 12 Mare Basalts, Part 1: The "Lumpers" Versus the "Splitters" Hanson B. Z. Delano J. W.* Experimental Data Bearing on the Oxidation State of Chromium and Vanadium in Mafic Volcanics Wentworth S. J.* McKay D. S. Bogard D. D. Apollo 12 Ropy Glasses Revisited Bogard D. D.* Garrison D. H. McKay D. S. Wentworth S. J. The Age of Copernicus: New Evidence for 800+-15 Million Years Vetter S. K.* Shervais J. W. Whole Rock Major Element Chemistry of KREEP Basalt Clasts in Lunar Breccia 15205: Implications for the Petrogenesis of Volcanic KREEP Basalts Haskin L. A.* Jolliff B. L. Colson R. O. On Partitioning of REE Between Whitlockite and Apatite in High-ITE Lunar Rocks: Petrologic Consequences Monday, March 16, 1992 VENUS GEOPHYSICS 1:30 p.m. Room A Chair(s): C. Johnson R. Herrick Sjogren W. L.* Venus Gravity: Status and New Data Acquisitions Grimm R. E.* Herrick R. H. Phillips R. J. Highlander III: On the Origin and Evolution of Large Uplands on Venus Lenardic A.* Kaula W. M. Bindschadler D. L. Maxwell and the Andes: Analogous Structures? Price E. J.* Connors C. Dahlen F. A. Suppe J. Williams C. A. Accretionary Wedge Mechanics on Venus: A Brittle/Ductile Critical Taper Model Zuber M. T.* Parmentier E. M. The Contribution of Dynamic Topography Due to Lithosphere Compression to the Structure of Mountain Belts and Ridge Belts on Venus Pronin A.* Kreslavsky M. A Possible Mechanism of Gravity Relaxation on Venus Namiki N.* Solomon S. C. The Gabbro-Eclogite Phase Transition and the Elevation of Mountain Belts on Venus Banerdt W. B.* Sammis C. G. Parallel Fracture Patterns on the Plains of Venus Herrick R. R.* Phillips R. J. Comparison of Magellan Data with the Interior Density Structure of Venus Johnson C. L.* Sandwell D. T. Flexure on Venus: Implications for Lithospheric Elastic Thickness and Strength Sandwell D. T.* Schubert G. Is the Venusian Lithosphere Subducting? Burt J. D.* Head J. W. Thermal Buoyancy on Venus: Underthrusting vs. Subduction Davies M. E.* Colvin T. R. Rogers P. G. Chodas P. W. Sjogren W. L. Venus' Rotation Period and Pole Direction Monday, March 16, 1992 ASSORTED ACHONDRITES 1:30 p.m. Room B Chair(s): G. A. McKay R. N. Clayton Harvey R. P.* McSween H. Y. Jr. Parental Magmas of the Nakhlites Re-Examined Wadhwa M.* Crozaz G. REE in Minerals in Nakhla and Lafayette: A Comparative Study of Trace Element Microdistributions McKay G.* Le L. Wagstaff J. REE Partition Coefficients for the Nakhla Parent Melt Lindstrom M. M.* Mittlefehldt D. W. Treiman A. H. Wentworth S. J. Gooding J. L. Morris R. V. Keller L. P. McKay G. A. LEW88516: A New Shergottite from Antarctica Boynton W. V.* Hill D. H. Kring D. A. The Trace-Element Composition of Lew 88516 and its Relationship to SNC Meteorites Treiman A. H.* Barrett R. A. Gooding J. L. The Lafayette Meteorite: Preterrestrial Aqueous Alterations Miyamoto M. Takeda H.* Two-Stage Cooling History of the Moore County Eucrite Shearer C. K.* Papike J. J. Origin of Olivine Diogenites and their Relationship to Basaltic Magmatism on the Eucrite Parent Body Nyquist L. E.* Bansal B. Wiesmann H. Shih C.-Y. 147Sm-143Nd Ages and 146Sm-142Nd Formation Intervals of Basalt Fragments from the HED Parent Body Ireland T. R.* Saiki K. Takeda H. Age and Trace-Element Chemistry of Yamato 791438 Zircon Jurewicz A. J. G.* McKay G. A. Chondrite Melting Experiments: Can Angrite LEW 87051 be Produced by Partial Melting of a CV or CM Chondrite? Clayton R. N.* Mayeda T. K. Nagahara H. Oxygen Isotope Relationships among Primitive Achondrites Kring D. A.* Boynton W. V. The Trace-Element Composition of Eagles Nest and its Relationship to Other Ultramafic Achondrites Monday, March 16, 1992 ORIGIN AND EVOLUTION OF PLANETARY SYSTEMS 1:30 p.m. Room C Chair(s): P. Cassen J. A. Nuth III Wolszczan A.* Discovery of Planets Around a Millisecond Pulsar Malhotra R.* Black D. Eck A. Jackson A. Constraints on the Putative Companions to PSR1257+12 Sandford S. A.* Allamandola L. J. Tielens A. G. G. M. Herbst T. The Detection of Methanol and Diamonds in Dense Molecular Clouds Kim J. S.* Marti K. Evidence for Neutron Irradiation in the Early Solar System Boss A. P.* Thermal Structure of the Solar Nebula Cassen P.* Thermal Models of the Primitive Solar Nebula Stepinski T. F.* Levy E. H. On the Generation of Magnetic Fields in the Solar Nebula at the Location of the Present-Day Asteroid Belt Stewart G. R.* Generalized Theory for Planetesimal Dynamics Williams D. R.* Wetherill G. W. Stewart G. R. Growth and Thermal Evolution of Planetesimals Wetherill G. W.* Simultaneous Growth and Orbital Evolution of Terrestrial and Asteroidal Embryos Cameron A. G. W.* The Giant Impact Revisited Drobyshevski E. M.* Mercury's Impact-Induced Self-Destruction and Early Impact History of Inner Planets Pepin R. O.* Evolution of Earth's Noble Gases from Primordial Distributions: Consequences of Assuming Hydrodynamic Loss Driven by Giant Impact Monday, March 16, 1992 PUBLIC SESSION HAROLD MASURSKY LECTURES 8:00 p.m. Bldg. 2 Auditorium Chair(s): TBA Shoemaker Eugene U.S. Geological Survey Stofan Ellen Jet Propulsion Laboratory Tuesday, March 17, 1992 VENUS: TECTONISM AND VOLCANIC ASSOCIATIONS 8:30 a.m. Room A Chair(s): S. E. Smrekar D. A. Senske Ivanov M. A.* Tormanen T. Head J. W. Global Distribution of Tesserae: Analysis of Magellan Data deCharon A. V.* Stofan E. R. Complex Ridged Terrain at Phoebe Regio, Venus from Magellan Data Bilotti F.* Suppe J. Planetary Distribution and Nature of Compressional Deformation Around Artemis Corona, Venus Tormanen T.* Raitala J. Tectonics of Southwestern Audra Planitia on Venus from Magellan Data: Evidence of Underthrusting Hansen V. L.* Regional Non-Coaxial Deformation on Venus: Evidence from Western Itzpapalotl Tessera Pohn H. A.* Schaber G. G. Indenter Type Deformation on Venus as Evidence for Large-Scale Tectonic Slip, and Multiple Strike-Slip Events as a Mechanism for Producing Tesselated Terrain Baer G.* Schubert G. Bindschadler D. L. Stofan E. R. Spatial and Temporal Relations Between Coronae and Extensional Belts, Northern Lada Terra Senske D. A.* Head J. W. Zones of Extension and Rifting on Venus: Characteristics and Distribution Roberts K. M.* Head J. W. Lancaster M. G. Guest J. E. Volcanism and Rifting Along the Northern Edge of Lada Terra, Venus Parker T. J.* Komatsu G. Baker V. R. Longitudinal Topographic Profiles of Very Long Channels in Venusian Plains Regions Pavri B.* Head J. W. Wilson L. Klose B. Steep-sided Domes on Venus: Distribution, Associations, and Implications for Petrologic Models Guest J. E.* Bulmer M. H. Beretan K. Michaels G. Saunders S. Gravitational Collapse of the Margins of Volcanic Domes on Venus Head J. W.* Crumpler L. S. Aubele J. C. A Major Global-Scale Concentration of Volcanic Activity in the Beta-Atla-Themis Region of Venus Tuesday, March 17, 1992 REDUCED METEORITES 8:30 a.m. Room B Chair(s): M. K. Weisberg A. H. Spitz Chang Y.* Benoit P. H. Sears D. W. G. Bulk Compositional Confirmation of the First EL3 Chondrite and some Implications Weisberg M. K.* Fogel R. A. Prinz M. FeO-rich Silicates and Reduction Processes in the Unequilibrated Enstatite Chondrites El Goresy A.* Wadhwa M. Nagel H.-J. Zinner E. K. Janicke J. Crozaz G. 53Cr-53Mn Systematics of Mn-Bearing Sulfides in Four Enstatite Chondrites Lodders K.* Fegley B. Jr. Lanthanide and Actinide Condensation into Oldhamite Under Reducing Conditions Dickinson T. L.* Lofgren G. E. Melting Relations for Indarch (EH4) Under Reducing Conditions Gaffey M. J. Reed K. L. Kelley M. S.* E-Type Apollo Asteroid (3103) 1982BB: A Hungaria-Derived Near-Earth Source Body for the Aubrites Treiman A. H.* Berkley J. L. A New Ureilite: Preliminary Data on Nuevo Mercurio (B) Spitz A. H.* ICP-MS Trace Element Analysis of Ureilites: Evidence for Mixing of Distinct Components Goodrich C. A.* Lugmair G. W. Addition of LREE-Enriched Material to a Ureilite at 4.23 Ga: Evidence for Episodic Metasomatism? Scott E. R. D.* Keil K. Taylor G. J. Origin of Ureilites by Partial Melting and Explosive Volcanism on Carbon-rich Asteroids Warren P. H.* Kallemeyn G. W. Ureilites: The Graphite f(O2) Buffer, Explosive Volcanism, and the Gross Dissipation of Basalt from the Parent Asteroid(s) Olsen E.* Davis A. M. Moore C. B. Clayton R. N. Mayeda T. K. Steele I. M. Puenta Del Zacate: First Occurrence of a Silicate Inclusion in a Type III Iron (But What Is It?) Petaev M. I.* Ariskin A. A. Thermodynamic Modelling of the Origin of the Divnoe Achondrite Tuesday, March 17, 1992 EVOLUTION OF THE LUNAR CRUST AND MANTLE 8:30 a.m. Room C Chair(s): R. L. Korotev G. Ryder Basu A.* Wentworth S. J. McKay D. S. Preliminary Results of a Petrographic Investigation of Apollo 16 Core 60014 Korotev R. L.* Compositional Differences Between Feldspathic Fragmental Breccias and Ancient Regolith Breccias from Apollo 16 Shih C.-Y.* Wiesmann H. Nyquist L. E. K-Ca Age of Lunar Granites Premo W. R.* Tatsumoto M. U-Pb Isotopes in Dunite 72415 Takeda H.* Miyamoto M. Mori H. Mineralogy and Cooling Histories of Lunar Granulites and Related Lunar Meteorites Phinney W. C.* D's for Cr, Mn, and Ti as Tests of Igneous vs. Subsolidus Equilibration of Mafic Minerals in Lunar Rocks Jolliff B. L.* Mafic, Ferroan Lithologies from North Ray Crater, Apollo 16: Implications for Crustal Abundance Ryder G.* Lunar Highlands Totality from Bits and Pieces: A Whole-Rock-Chemistry-Free Characterization of an Evolved Hypabyssal Igneous Gabbro Schlieren from the Apollo 17 Landing Site Longhi J.* Fram M. S. Vander Auwera J. Montieth J. Pressure Effects in Anorthositic and Related Magmas Nyquist L. E.* Shih C.-Y. Nd Isotopic Evidence for Lunar Crust/Mantle Mixing - Possibly During a Basin-Forming Impact Hess P. C.* Dissolution of Plagioclase and the Origin of Mg-Suite Parent Magmas Solomatov V. S.* Stevenson D. J. Comparison of Lunar and Terrestrial Magma Oceans Tuesday, March 17, 1992 OUTER SOLAR SYSTEM/REMOTE SENSING: LABORATORY 8:30 a.m. Room D Chair(s): D. Domingue L. Lebofsky Colwell J. E.* Esposito L. W. Formation of Narrow Planetary Rings by Satellite Disruption Kuramoto K.* Matsui T. Loss of Ice from Accreting Giant-Icy-Satellites by the Escape of Hot Proto-Atmospheres Malcuit R. J.* Mehringer D. M. Winters R. R. Numerical Simulation of Retrograde Tidal Capture of a Triton-like Planetoid by a Neptune-like Planet: Two-Dimensional Limits of a Stable Capture Zone Nash D. B.* VanHecke G. R. Chemical Working Fluid Mechanism for Recycling and Exothermic Heating of Io's Surface Rudnyk M.* Pieri D. Lineament Types as Evolutionary Stages for Development of Ridges/Scarps on Europa Pappalardo R.* Greeley R. Single-Plate Rifting Model for Ridge and Trough Terrain on Icy Satellites Henderson B. G.* Jakosky B. M. Randall C. E. Multiple Scattering and Polarization of Thermal Emission from Particulate Planetary Surfaces Hapke B.* Nelson R. Smythe W. Gharakanian V. Horn L. Lane A. Opposition Effect and Negative Polarization: Laboratory Studies Oehler A.* Neukum G. First Results from the DLR Goniospectrophotometer Wald A. E.* Salisbury J. W. Angular Dependence of Spectral Emissivity of Quartz and Basalt Dilley J.* The Coefficient of Restitution for Collisions of Icy Spheres Kane K. Y. Cremers D. A.* Remote Elemental Analysis of Planetary Surfaces Using Laser-Induced Breakdown Spectroscopy Tuesday, March 17, 1992 Session Dedicated to William Quaide on the Event of His Retirement VENUS VOLCANISM 1:15 p.m. Room A Chair(s): J. J. Plaut K. M. Roberts Burnett D. Introduction Holloway J. R.* Volcanic Degassing Under Thick Atmospheres: Consequences for Magmatic Volatiles on Venus Sakimoto S. E. H.* Zuber M. T. Marsh B. D. Cooling of Ascending Magma on Venus and Earth Wilson L.* Head J. W. Magma Reservoirs and Neutral Buoyancy Zones on Venus: Implications for the Formation and Evolution of Volcanic Landforms Parmentier E. M.* Hess P. C. Chemical Differentiation of a Convecting Planetary Interior: Consequences for One-Plate Planets such as Venus Kargel J. S.* Komatsu G. The Composition of Venus and the Petrogenesis of Venusian Silicate Lavas Klose K. B.* Zolotov M. Yu. Chemical Weathering of Evolved Igneous Rocks on Venus Basilevsky A. T.* Weitz C. M. Venera 9, 10 and 13 Landing Sites as seen by Magellan Gregg T. K. P.* Greeley R. Formational Constraints on Venusian "Canali" Robinson C. A.* Wood J. A. Recent Volcanic Activity on Venus: Evidence from Emissivity Measurements Keddie S. T.* Head J. W. Sapas Mons Venus: Sequence of Events in a Large Shield Volcano Lancaster M. G.* Guest J. E. Roberts K. M. Head J. W. "Great" Lava Fields on Venus Campbell B. A.* Comparison of Magellan Measurements of Surface Roughness on Venus to Topographic Profiles of Terrestrial Basaltic Lava Flows Plaut J. J.* Multiple Views of Venus: Geological Significance of Scattering Law Anomalies Tuesday, March 17, 1992 CHONDRULES 1:30 p.m. Room B Chair(s): J. M. Dehart D. W. G. Sears Simon S. B.* Grossman L. Petrography, Composition and Origin of Chromian Spinel Crystals Separated from the Murchison Meteorite Wasson J. T.* Krot A. Oxidizing Conditions in the Solar Nebula and the Origin of Chromite Chondrules Lu J.* Sears D. W. G. Benoit P. H. Prinz M. Weisberg M. K. The Four Primitive Chondrule Groups and the Formation of Chondrules Jones R. H.* Petrology of FeO-poor, Porphyritic Pyroxene Chondrules in the Semarkona Ordinary Chondrite DeHart J. M.* Lofgren G. E. Annealing Studies of Type A Chondrule Analogs Lofgren G. E.* DeHart J. M. Dynamic Crystallization Studies of Enstatite Chondrite Chondrules: Cathodoluminescence Properties of Enstatite Connolly H. C. Jr.* Hewins R. H. Chondrule Modifications as a Possible Indicator of Rim-Forming Mechanisms Kennedy A. K.* Lofgren G. E. Wasserburg G. J. A Study of Trace Element Partitioning Between Olivine, Orthopyroxene and Melt in Chondrules: Equilibrium Values and Kinetic Effects Lofgren G. E.* DeHart J. M. Dickinson T. L. Relict Enstatite and Olivine in Porphyritic Chondrules from Enstatite Chondrites Formed by Partial Melting of Precursor Material Palme H.* Spettel B. Kurat G. Zinner E. Origin of Allende Chondrules Hervig R. L.* Steele I. M. Oxygen Isotopic Analysis of Allende Olivine by Ion Microprobe and Implications for Chondrule Origin Kurat G.* Brandstatter F. Zinner E. Palme H. Spettel B. A SIMS Study of Some Allende Chondrules: Support for the New Chondrule Model Sahagian D. L. Hewins R. H.* The Size of Chondrule-Forming Events Tuesday, March 17, 1992 IMPACT CRATERING: THEORY AND EXPERIMENTATION 1:30 p.m. Room C Chair(s): D. A. Crawford C. L. Smither Crawford D. A.* Schultz P. H. The Production and Evolution of Magnetic Fields During Hypervelocity Impacts Schmidt R. M.* Experiments to Investigate Atmospheric Effects on Crater Size Barnouin O.* Schultz P. H. A Continuum Model for Atmospheric Response to an Advancing Ejecta Curtain Housen K. R.* Crater Ejecta Velocities for Impacts on Rocky Bodies Asphaug E.* Melosh H. J. Ryan E. Theoretical Predictions for Fragment Size Distributions Ryan E. V.* Asphaug E. Melosh H. J. Hydrocode Simulation of Explosive Disruption: External Pressure and Gravity Smither C. L.* Ahrens T. J. Energy Partitioning and Ejecta Escape for Normal and Oblique Impacts on Self Gravitating Planetary Systems Yang W.* Ahrens T. J. Silicate Jet Ejecta Mass and Geometry upon Oblique Impact Brackett R. A.* McKinnon W. B. Pressure Attenuation in Impacts Determined Using a Finite Shell Model: Implications for Melt and Vapor Scaling O'Keefe J. D.* Ahrens T. J. Melting and Shock Weakening Effects on Impact Crater Morphology Mittlefehldt D. W.* See T. H. Horz F. Projectile Dissemination in Impact Melts from Meteor Crater, Arizona Graup G.* Palme H. Spettel B. Trace Element Stratification in the Stevns Klint Cretaceous/Tertiary Boundary Layers Ahrens T. J. Rowan L. Yang W. Becker R. H.* Pepin R. O. Impact Release of Noble Gases from the Murchison Meteorite Tuesday, March 17, 1992 POSTER SESSION I: VENUS GEOMORPHOLOGY 7:00 - 9:00 p.m. LPI Chair(s): None Clark J. Alexander D. Andres P. Stanley C. Image Processing Data Products for the Magellan Mission Finn V. J. Baker V. R. Venus and Earth: Morphostructural Comparison and Endogenetic Implications Gulick V. C. Baker V. R. Komatsu G. Channel and Valley Morphology on Venus: An Updated Classification Kucinskas A. B. Turcotte D. L. Huang J. Ford P. G. A Spectral Study of Venus Topography in Two Selected Equatorial Regions Landheim R. Geringer M. A. Greeley R. Barker J. Radar-Visible Wind Streaks on Venus Compared with Terrestrial Analogs Stofan E. R. Plaut J. J. Greeley R. Arvidson R. A. Elachi C. Geringer M. A. Saunders R. S. Schubert G. Wall S.D. Weitz C. M. Geologic Settings of Aeolian Features on Venus Weitz C. M. Elachi C. Blom R. Greeley R. Two Possible Dune Fields on Venus Tormanen T. Geomorphic/Geologic Map of Audra Planitia Region on Venus Based on Magellan Radar Image Mosaic C1-MIDR.60N070;1 Tuesday, March 17, 1992 POSTER SESSION I: VENUS TECTONICS 7:00 - 9:00 p.m. LPI Chair(s): None Wieczorek M. A. Tatsumura M. J. Leyva I. A. Desmarais K. Johnson J. Koopowitz L. Landheim R. Bindschadler D. L. Morphologic Mapping of the Region from Northern Ovda Regio to Southern Tellus Regio, Venus Bindschadler D. L. Tatsumura M. J. Tellus Regio, Venus: Preliminary Magellan Observations of a Region of Complex Ridged Terrain Grosfils E. B. Head J. W. Venusian Stress Directions from Radial Fractures Ghail R. Wilson L. Subduction at Artemis Chasma Michaels G. A. Saunders R. S. Stofan E. R. Morphology of Regional Fracture Systems on Venus Parfitt E. A. Head J. W. A Survey of Radial Fracture Systems on Venus Smrekar S. E. Solomon S. C. Tectonic Implications of Gravitational Spreading Models for Ishtar Terra, Venus Tuesday, March 17, 1992 POSTER SESSION I: VENUS IMPACT CRATERS 7:00 - 9:00 p.m. LPI Chair(s): None Chadwick D. J. Schaber G. G. Moore H. J. Strom R. G. Bright Crater Outflows on Venus Duval D. M. Wood C. A. Impact Crater Flows on Venus: Morphological Evidence for Complex Ejection Dynamics Edmunds M. S. Sharpton V. L. Characterization of Ejecta Facies Around Large Venusian Craters: Implications for the Origin of Flow-like Ejecta Garvin J. B. Schaber G. G. Morphometry of Large Impact Craters on Venus: Comparisons with Terrestrial and Lunar Examples Grieve R. A. F. Cintala M. J. Venusian Impact Craters: Effects of Differential Scaling Ivanov B. A. Provalov A. A. Rybakov V. A. The Possible Radiative Heat Damage of the Venusian Surface Leff C. Morrison A. D. The Small Craters of Venus - An Inspection Using Magellan Data Moore H. J. Weitz C. M. Schaber G. G. Cochran and Other Venusian Impact Craters Schenk P. Sharpton V. L. The Simple-to-Complex Crater Transition on Venus Schultz P. H. Wake-Blast Effects in Laboratory Experiments and on Venus Weitz C. M. Moore H. J. Schaber G. G. Low-Emissivity Impact Craters on Venus Nikolaeva O. V. Klose K. B. The Giant Impact: A New Paradigm for the Origin of the Global Crustal Dichotomies of the Terrestrial Planets Tuesday, March 17, 1992 POSTER SESSION I: PLANETARY VOLCANISM 7:00 - 9:00 p.m. LPI Chair(s): None Crumpler L. S. Head J. W. Aubele J. C. Guest J. Saunders R. S. Venus Volcanism: Global Distribution and Classification from Magellan Data Aubele J. C. Head J. W. Crumpler L. S. Guest J. E. Saunders R. S. Fields of Small Volcanoes on Venus (Shield Fields): Characteristics and Implications Wiles C. R. Forshaw M. R. B. Automated Detection and Measurements of Small Volcanoes on Venus Head J. W. Crumpler L. S. Aubele J. C. Large Shield Volcanoes on Venus: Distribution and Classification Bulmer M. H. Guest J. E. Stofan E. R. Calderas on Venus Moore H. J. Schenk P. M. Plaut J. J. Weitz C. M. An Explosive Eruption on Venus Wenrich M. L. Greeley R. Investigation of Venusian Pyroclastic Volcanism Schenk P. Moore H. J. An Unusual Thick Lava Flow in Ovda Regio, Venus Komatsu G. Baker V. R. Formation of Venusian Channels and Valleys, and Styles of Volcanism Straub D. W. Burns R. G. A Kinetic Study of the Conversion of Hematite to Magnetite with Applications to the Metastability of Hematite on Venus Zimbelman J. R. Edgett K. S. Volcanic and Modified Landforms on the Tharsis Montes, Mars Bertka C. M. Martian vs. Terrestrial Volcanism: Are Partial Melt Properties Influential? Lopes-Gautier R. M. C. Kilburn C. R. J. The Growth of Aa and Blocky Lavas and Implications for Magmatic Feeding Systems Austin R. T. England A. W. Multi-Scale Roughness Spectra of Volcanic Debris Flows Tuesday, March 17, 1992 POSTER SESSION I: IMPACT CRATERING: THEORETICAL ASPECTS 7:00 - 9:00 p.m. LPI Chair(s): None Zenchenko E. V. Tsvetkov V. M. The Effect of Target Properties on Cratering Mechanism Crawford D. A. Schultz P. H. Experimental Investigations of Impact-Generated Magnetic Fields Ivliev A. I. Kashkarov L. L. Baryshnikova G. V. Badjukov D. D. Thermoluminescence of Oligoclase as Indicator of Shock Metamorphic Processes Gratz A. J. Nellis W. J. Hinsey N. Laboratory Simulations of Explosive Volcanism and Implications for the K/T Boundary Gratz A. J. Nellis W. J. Hinsey N. Shock Deformation and Transformation in the SiO2 System Oberbeck V. R. Aggarwal H. Impact Crater Deposit Production on Earth McHone J. F. Dietz R. S. Earth Multiple Impact Craters and Astroblemes Oberbeck V. R. Marshall J. R. Impacts, Flood Basalts, and Continental Breakup Tuesday, March 17, 1992 POSTER SESSION I: TEKTITES 7:00 - 9:00 p.m. LPI Chair(s): None Delano J. W. Australite Flanges as Flight Data Recorders Izett G. A. Obradovich J. D. Laser-Fusion 40Ar/39Ar Age of Australasian Tektites Tuesday, March 17, 1992 POSTER SESSION I: OUTER SOLAR SYSTEM 7:00 - 9:00 p.m. LPI Chair(s): None Boyce J. M. Rogers P. G. The Canteloupe Terrain of Triton Croft S. K. Aspects of Tectonics on Icy Satellites McEwen A. S. Isbell N. R. Pearl J. C. Io Thermophysics: New Models with Voyager I Thermal IR Spectra Schenk P. Volcanism on Triton Tuesday, March 17, 1992 POSTER SESSION I: LABORATORY REMOTE SENSING 7:00 - 9:00 p.m. LPI Chair(s): None Hudgins D. M. Sandford S. A. Allamandola L. J. Tielens A. G. G. M. The Measurement of Optical Constants from Interstellar and Solar System Ice Analogs Using Transmission Infrared Spectroscopy Salisbury J. W. Wald A. E. The Role of Volume Scattering in Reducing Spectral Contrast of Reststrahlen Bands in Spectra of Powdered Minerals Shepard M. K. Arvidson R. E. Guinness E. A. Deering D. W. Volume and Surface Scattering Properties of Lunar Lake Playa, Nevada Tuesday, March 17, 1992 POSTER SESSION I: SOLAR SYSTEM FORMATION 7:00 - 9:00 p.m. LPI Chair(s): None Hood L. L. Horanyi M. Gas Dynamic Heating of Chondrule Precursor Grains: Mechanisms for Generation of Nebular Shock Waves Nuth J. A. Berg O. Faris J. Wasilewski P. Laboratory Studies of Very Small Iron Grains: Magnetically Enhanced Coagulation Peak D. Kusiak S. J. Donn B. Laboratory Studies of Analogs of Early Solar Nebula Condensed Objects Tonks W. B. Melosh H. J. Magma Ocean Formation due to Giant Impacts: The Effect of the Planet's Thermal State Before the Collision Verronen M. Vanhala H. Collisional Model for Turbulent and Molecular Processes in Preplanetary Disk Weidenschilling S. J. Davis D. R. Multizone Simulations of Planetary Accretion: Effects of Distant Perturbations Warren P. H. Inheritance of Magma Ocean Differentiation Through Lunar Origin by Giant Impact Tuesday, March 17, 1992 POSTER SESSION I: ACHONDRITES AND IRONS 7:00 - 9:00 p.m. LPI Chair(s): None Treiman A. H. The Parent Magma of the Nakhla (SNC) Meteorite: Constraints from Magmatic Inclusions in Olivine Longhi J. Volatiles in SNC Petrogenesis: A Sr Signal? Pun A. Keil K. Taylor G. J. Wieler R. King E. A. Clasts in Kapoeta: Implications for the Regolith Evolution of the HED Parent Body Buchanan P. C. Reid A. M. Matrix Pyroxenes in Howardites and Polymict Eucrites Saiki K. Yamaguchi A. Takeda H. New Chemical Mapping Technique for Analysis of Pyroxenes in Polymict Breccias and Application to Some Eucrites Golden D. C. Ming D. W. Zolensky M. E. Chemistry and Mineralogy of Oxidation Products from a Nickel-rich Ataxite Hall T. M. Burns R. G. Fusion Crusts of Achondrites: Changes of Mineralogy of Iron in Outermost Surfaces of Meteorites Ntaflos Th. Koeberl C. Petrological Studies and Bulk Chemical Analyses of Eight Antarctic Aubrites Takeda H. Baba T. Mori H. Saito J. Mineralogy of a New Orthopyroxene-Bearing Ureilite LEW88201 and the Relationship Between Magnesian Ureilites and Lodranites Petaev M. I. Barsukova L. D. Shumskaya T. V. Romashova T. V. Galuzinskaya A. K. Smoliar M. I. The Divnoe Achondrite - VI. New Data on Bulk Chemistry Tuesday, March 17, 1992 POSTER SESSION I: CHONDRULES AND INCLUSIONS 7:00 - 9:00 p.m. LPI Chair(s): None Russell S. S. Pillinger C. T. Modelling Nitrogen Degassing in Chondrite Diamonds Fisenko A. V. Russell S. S. Ash R. D. Semjenova L. F. Verchovsky A. B. Pillinger C. T. Isotopic Composition of Carbon and Nitrogen in the Diamonds from the Unequilibrated Ordinary Chondrite Krymka LL3.0 Krot A. Ivanova M. A. Cr-rich Chondrules and Inclusions in Ordinary Chondrites Keller L. P. Petrography and Mineral Chemistry of Calcium- and Aluminum-rich Inclusions in the Maralinga CK4 Chondrite Jones R. H. Classification of Porphyritic, Pyroxene-rich Chondrules in the Semarkona Ordinary Chondrite Ruzicka A. Boynton W. V. Microfaulting of CAI Rim Layers and Relationships to the Fabric of the Leoville (CV3) Chondrite Tuesday, March 17, 1992 POSTER SESSION I: CHONDRITES AND METEORITE RECOVERY 7:00 - 9:00 p.m. LPI Chair(s): None Bischoff A. Sears D. W. G. Benoit P. H. Geiger T. Stoffler D. New Type 3 Ordinary Chondrites from the Sahara Desert Kallemeyn G. W. Three Ungrouped Carbonaceous Chondrites from MacAlpine Hills, Antarctica Prinz M. Weisberg M. K. Acfer 182/207: A New ALH85085-Type Chondrite and its Implications Lipschutz M. E. Wolf S. F. Gartenhaus S. Lindstrom M. M. Mittlefehldt D. W. Zolensky M. E. Wacker J. F. Benoit P. H. Sears D. W. G. Dodd R. T. Noblesville Meteorite Breccia: Recovery and Initial Characterization McCoy T. J. Keil K. Bogard D. Casanova I. Lindstrom M. M. Ilafegh 009: A New Sample of the Diverse Suite of Enstatite Impact Melt Rocks Reid A. M. Jakes P. Zolensky M. Miller R. Three New Chondrites from Western Namibia Mardon A. A. Williams J. S. Potential Meteorite Recovery Locales Within Russian Antarctic Logistical Capability Tuesday, March 17, 1992 POSTER SESSION I: THE MOON COMES TO YOU! 7:00 - 9:00 p.m. LPI Chair(s): None Kadel S. D. Greeley R. Mare Basalts in the Orientale Basin: Galileo Multispectral Observations Mustard J. F. Head J. W. Murchie S. M. Pieters C. M. Belton M. S. McEwen A. S. Schickard Cryptomare: Interaction Between Orientale Ejecta and Pre-Basin Mare from Spectral Mixture Analysis of Galileo SSI Data McEwen A. S. Gaddis L. R. Neukum G. Hoffmann H. Pieters C. M. Head J. W. III Lunar Craters and Soils: Ages, Colors, and Regolith Thicknesses Tompkins S. Pieters C. M. Mustard J. F. Pinet P. Distribution of Materials Excavated by the Lunar Crater Bullialdus: A Spectral Mixing Analysis Sprague A. L. Witteborn F. C. Kozlowski R. W. H. Cruikshank D. P. Bartholomew M. J. Graps A. L. The Moon: Mid-Infrared (7.5-11.4 micrometers) Spectroscopy of Five Selected Regions Wilson T. L. The Moon as a Scientific Laboratory Coombs C. R. Hawke B. R. Robinson M. S. Pyroclastic Deposits on the Northwestern Limb of the Moon Clark P. Joerg S. Using Geochemical Profiles of Recent Impact Features in Northeastern Tranquillitatis to Characterize Mare/Highland Interfaces Pinet P. C. Chevrel S. Shevchenko V. V. High Resolution UV-Visible-Near Infrared Spectro-Imaging Data of Reiner Gamma Formation Sears W. D. Tidal Dissipation and the Giant Impact Origin for the Moon Jaumann R. Grobner C. Dummel A. Rebhan H. Neukum G. Dependence of Color Ratios on the Observation Geometry Haines E. L. Metzger A. E. Drake D. M. Water Detection at the Moon and Mars with a Combined Neutron-Gamma Ray Instrument Stacy N. J. S. Campbell D. B. Ford P. G. High Resolution Lunar Radar Studies - Preliminary Results Mardon A. A. Space Gophers: Robotic Mining Systems in Inner Solar System Exploration Melendrez D. E. Larson S. M. Singer R. B. Johnson J. R. High Spatial Resolution Mapping of Lunar Mare Titanium Abundances Taylor L. A. McKay D. S. An Ilmenite Feedstock on the Moon: Beneficiation of Rocks Versus Soil Stern S. A. Imaging Detection of Atmospheric Sodium over the Lunar Terminator Swindle T. D. Burkland M. K. Johnson J. R. Larson S. M. Morris R. V. Rizk B. Singer R. B. Systematic Variations in Solar Wind Fluence with Lunar Location: Implications for Abundances of Solar-Wind-Implanted Volatiles Premo W. R. Tatsumoto M. Acid Leaching of Apatite: Implications for U-Th-Pb Systematics of Lunar Highland Plutonic Rocks Neal C. R. Taylor L. A. Schmitt R. A. Liu Y.-G. The Recognition of Monomict and Polymict Clasts from Apollo 17 Breccias Delano J. W. Major-Element Compositions of Glasses in Apollo 16 Cores 60014 (Station 10) and 64001 (Station 4) Schwarz C. Preliminary Description of 60013, Bottom Half of Double Drive Tube 60014/60013 Housley R. M. XPS Studies of the Surface Chemistry of Lunar Highlands Regolith Finnila A. B. Hess P. C. Rutherford M. J. Dissolution of Anorthite in Lunar Maria Basalts: Preliminary Experiments and Petrologic Significance Pearce T. H. Timms C. Interference Imaging of Plagioclase in Lunar Materials Jull A. J. T. Donahue D. J. 14C Terrestrial Ages of Two Lunar Meteorites, ALHA 81005 and EET 87521 Tuesday, March 17, 1992 POSTER SESSION I: INSTRUMENTS AND FUTURE PLANETARY EXPLORATION 7:00 - 9:00 p.m. LPI Chair(s): None Kieffer H. H. Wildey R. L. Spectrophotometry of the Moon for Calibration of Space-Borne Imaging Instruments Blake D. F. Bryson C. Freund F. Design of an X-Ray Diffraction/X-Ray Fluorescence Instrument for Planetary Applications Mancinelli R. L. Banin A. White M. R. DTA/GC: Limits of Detectability and Identification of Minerals Elphic R. C. Funsten H. O. III Barraclough B. L. McComas D. J. Vaniman D. T. Can Secondary Ion Mass Spectrometry Resolve Variations in Lunar Surface Composition? Bruckner J. Fabian U. Patnaik A. Wanke H. Cloth P. Dagge G. Druke V. Filges D. Englert P. A. J. Drake D. M. Reedy R. C. Parlier B. Simulation Experiments for Planetary Gamma-Ray Spectroscopy by Means of Thick Target High-Energy Proton Irradiations Shelfer T. D. Pimperl M. M. Wills E. L. Agresti D. G. Morris R. V. Development of a Backscatter Mossbauer Spectrometer (BaMS) for Planetary Applications Klingelhofer G. Foh J. Held P. Jager H. Kankeleit E. Teucher R. Evlanov E. N. Khromov V. N. Mukhin L. M. Prilutski O. F. Zubkov B. Knudsen J. M. Madsen M. Smirnov G. V. Juchniewicz J. d'Uston C. Mossbauer Spectrometer for Mineralogical Analysis of the Mars Surface for the Mars-96 Mission Metzger A. E. Haines E. L. Seasonal Cap Measurements at Mars via Gamma Ray Spectroscopy Drake D. M. Drosg M. Byrd R. C. Reedy R. C. Clark D. A. Englert P. A. J. Bobias S. G. Dempsey J. F. Harris L. Experimental Simulations of Martian Neutron Spectra Costard F. M. Achache J. Bibring J. P. Blanc M. Coutin-Faye S. Langevin Y. Lognonne P. Masson P. Moura D. Rocard F. Mars Rover Mission: The French Views Vorder Bruegge R. W. Science Rationale for a Discovery Program Venus Atmospheric Probe Mission Allton J. H. Lyons D. M. Computer Games Geologists Play: A Tool for Determining Appropriate Rover Autonomy Crowell L. B. Spacetime Geodesy by Neural Networks Gooding J. L. Allton J. H. Byers T. B. Dunn R. P. Gibbons F. L. Pate D. B. Thermal Analyzer for Planetary Soils (TAPS) Experiment, 2: Water Sensors Wednesday, March 18, 1992 DYNAMICS OF IMPACT AND RESURFACING ON VENUS 8:30 a.m. Room A Chair(s): B. A. Ivanov N. R. Izenberg Schultz P. H.* Impactor Signatures on Venus Johnson J. R.* Komatsu G. Baker V. R. Elliptical Impact Craters on Venus Soderblom L. A.* Chadwick D. J. Schaber G. G. Surface Effects of Impacts into Venus' Atmosphere Takata T.* Ahrens T. J. Phillips R. J. Atmospheric Effect on Cratering on Venus Provalov A. A. Ivanov B. A.* Near Surface Soil-Gas Flow Due to Impact on Venus Zahnle K. J.* Airburst Origin of Dark Shadows on Venus Campbell D. B.* Stacy N. J. S. Newman W. Arvidson R. E. Magellan Observations of Extended Impact Crater Related Deposits on the Surface of Venus Bills B. G.* Venus: Satellite Orbital Decay and Consequent Crater Production Bullock M. A.* Grinspoon D. H. Head J. W. Modeling the Volcanic Resurfacing of Venus Strom R. G.* Schaber G. G. Arkani-Hamed J. Toksoz M. N. Global Resurfacing of Venus Izenberg N. R.* Arvidson R. E. Phillips R. J. Resurfacing Processes on Venus: Approaching a Global View Simpson R. A.* Tyler G. L. Maurer M. J. Holmann E. Scattering Properties of Venus' Surface Greeley R.* Geringer M. A. Arvidson R. E. Elachi C. Plaut J. J. Saunders R. S. Stofan E. R. Wall S. D. Weitz C. M. Schubert G. Thouvenot E. J. P. Wind-Related Features on Venus Observed via Magellan Wednesday, March 18, 1992 NEBULAR PROCESSES AND CAIs 8:30 a.m. Room B Chair(s): J. T. Armstrong G. W. Lugmair Harper C. L. Jr.* Wiesmann H. High Precision Investigations of the 53Mn-53Cr Systematics. I. Bulk Carbonaceous Chondrites, Planetary Reservoirs and the Moon Lugmair G. W.* MacIsaac C. Shukolyukov A. The 53Mn-53Cr Isotope System and Early Planetary Evolution Shukolyukov A.* Lugmair G. W. First Evidence for Live 60Fe in the Early Solar System Jessberger E. K.* Jordan J. L. Shukolyukov Yu. A. Meshik A. P. Minh D. V. Widespread Alien Xe and its Formation Ash R. D.* Pillinger C. T. Carbon and Nitrogen Isotopes in CR Chondrites; Evidence for a Single Parent Body? Thiemens M. H.* Mass Independent Isotope Effects: Recent Advances and Application to the Pre-Solar Nebula and Stratosphere Chen J. H.* Wasserburg G. J. Papanastassiou D. A. Th and U in Some Chondrites Jurewicz S. R.* Jones J. H. Experimental Partitioning of Zirconium, Titanium, and Niobium Between Silicate Liquid and Platinum Metal Chamberlin L.* Beckett J. R. Stolper E. M. Experimental Determination of Oxide Activities in Synthetic CAI and POI Melts Zanda B.* Inclusions in the Metal of ALH85085: New Clues to a Condensation Origin? Armstrong J. T.* Evidence for Ni-Pt-Ge-Te-rich 'Opaque Assemblages' in CV3 CAI Being True Fremdlinge and Not Low Temperature Alteration Davis A. M.* Simon S. B. Grossman L. Melilite Composition Trends during Crystallization of Allende Type B1 Refractory Inclusion Melts Sylvester P. J.* Simon S. B. Grossman L. Chemical Compositions of Fremdlinge from a Type A Allende Inclusion Wednesday, March 18, 1992 A FIELD TRIP TO THE MOON 8:30 a.m. Room C Chair(s): B. R. Hawke A. S. McEwen Head J. W.* Problems in Lunar Science: Galileo Results and the Promise of Future Exploration Pieters C. M.* Belton M. Fischer E. Greeley R. Jaumann R. Head J. W. Hoffmann H. McEwen A. Murchie S. Neukum G. Sunshine J. Compositional Implications of SSI Multispectral Images of the Unexplored Lunar Farside Hawke B. R.* Lucey P. G. Taylor G. J. Peterson C. A. Spudis P. D. The Distribution and Modes of Occurrence of Lunar Anorthosite Spudis P. D.* Hawke B. R. Lucey P. G. Taylor G. J. Peterson C. Geology and Deposits of the Humorum Basin Murchie S. L.* Head J. W. McEwen A. S. Mustard J. F. Pieters C. M. Belton M. S. Spectral Properties of Orientale Basin Materials from Galileo Images Sunshine J. M.* Pieters C. M. Head J. W. McEwen A. S. Greeley R. Oceanus Procellarum as Viewed by Galileo: Evidence for Compositional Diversity in the Mare Deposits and at the Marius Hills Plateau Williams D. A.* Greeley R. Lunar Farside Mare Deposits: Latest Galileo Imaging Results Hiesinger H.* Hoffmann H. Jaumann R. Rebhan R. Neukum G. Earth-Based Multispectral Observations of Mare Humorum and Western Oceanus Procellarum: Geological and Geochemical Implications Hawke B. R. Peterson C. A.* Lucey P. G. Taylor G. J. Blewett D. T. Spudis P. D. Spectral Reflectance Studies of the Grimaldi Region of the Moon Blewett D. T.* Hawke B. R. Lucey P. G. Bell J. F. III Bell J. F. Taylor G. J. Peterson C. A. Spudis P. D. A Near-IR Spectral Investigation of the Schiller-Schickard Region of the Moon Fischer E. M.* Pieters C. M. McEwen A. S. Head J. W. Belton M. J. S. Lunar Highland Soil Heterogeneity: Al/Si Estimated for the Limb and Farside from Galileo SSI and Apollo X-Ray Spectrometer Data Pinet P. C.* Chevrel S. Martin P. Detailed Spectro-Mixing Analysis of Copernicus Crater from High Resolution Visible-Near Infrared Imaging Data Robinson M. S.* Lucey P. G. Hawke B. R. Smith G. A. Mariner 10 Color Images of the Eastern Limb and Farside of the Moon Wednesday, March 18, 1992 MARTIAN SPECTRAL AND LABORATORY DATA 8:30 a.m. Room D Chair(s): P. E. Geissler I. P. Wright Mustard J. F.* Erard S. Bibring J.-P. Langevin Y. Head J. W. Pieters C. M. Pyroxene Chemistry of the Syrtis Major Volcanic Plateau Geissler P. E.* Singer R. B. Spectrophotometric Mapping of Coprates Quadrangle, Mars Robinson M. S.* Zimbelman J. R. Viking IRTM Analysis of Apollinaris Patera, Mars Roush T. L.* Witteborn F. C. Bregman J. Rank D. Graps A. Pollack J. B. Thermal Infrared Spectra (5.5-9.2um) of Mars Obtained from the Kuiper Airborne Observatory Edgett K. S.* Christensen P. R. The Windblown Sands of Mars: Estimation of the Amount of Sand in Dark Intracrater Deposits Bishop J. L.* Pieters C. M. Strength of IR Hydration Bands: Application to the Martian Surface Blaney D. L.* Does Adsorbed Carbon Dioxide Contribute to the Infrared Spectrum of Mars? Zent A. P.* Roush T. L. The Spectra of Chemisorbed CO2 on Mars Analog Materials Madsen M. B.* Olsen M. Knudsen J. M. Petersen D. Vistisen L. The Ferrigmagnetic Phase in Nakhla and Zagami - Implications for the Martian Fines Wright I. P.* Pillinger C. T. Grady M. M. An Investigation of the Carbon in Different Lithologies of Zagami Jull A. J. T.* Donahue D. J. Swindle T. D. Burkland M. K. Herzog G. F. Albrecht A. Klein J. Middleton R. Isotopic Studies Relevant to the Origin of the "White Druse" Carbonates on EETA 79001 Spargur C. S. Gooding J. L.* Calorimetric "Weatherometer" for Stony Meteorites Plumb R. C.* Scala A. A. Tantayanon R. False-Positive Responses in "Getter" Simulations of Viking LR Results: Invalidation of that Evidence for Acidic Clay Minerals on Mars Wednesday, March 18, 1992 TECTONISM AND VOLCANISM: MOON AND MARS 1:30 p.m. Room A Chair(s): N. T. Bridges R. W. Wichman Kiefer W. S.* Convective Uplift and the Formation of the Tharsis and Elysium Regions of Mars Golombek M. P.* Banerdt W. B. Franklin B. J. Limits on the Expansion and Contraction of the Moon Watters T. R.* A Globally Distributed Compressional Ridge System on Mars? Schultz R. A.* Zuber M. T. Why are Strike-Slip Faults that are "Predicted" by Lithospheric Deformation Models Rarely Observed on Planetary Surfaces? McGovern P. J.* Solomon S. C. State of Stress and Tectonics of Large Volcanoes on Mars and Earth Wichman R. W.* Schultz P. H. Distribution of Lithospheric Failure and Volcanism in the Lunar Crisium Basin: Additional Signatures of an Oblique Multi-Ring Impact Structure Cooper B. L.* Apollo 17 Lunar Sounder: Evidence for Graben Structure in the Procellarum Basin? Bridges N. T.* Fink J. H. Aspect Ratios of Lava Domes on the Earth, Moon and Venus Bruno B. C.* Taylor G. J. Rowland S. K. Lucey P. G. Self S. Fractal Analysis: A New Remote Sensing Tool for Lava Flows Baloga S. M.* Taylor G. J. Bruno B. C. The Character of Lava Flow Margins Crisp J.* Baloga S. The Influence of Crystallization and Entrainment on the Emplacement of Lava Flows Mouginis-Mark P. J.* Emplacement of Long Lava Flows at Elysium Mons, Mars Zimbelman J. R.* Late-Stage Effusion and Mass-Wasting on Ascraeus Mons Volcano, Mars Wednesday, March 18, 1992 EDUCATIONAL OUTREACH AND CAREER OPPORTUNITIES 1:30 p.m. Room B Chair(s): N. G. Barlow L. A. Lebosky Invited 15 Minute Presentations: Schultz P. H.* The Subliminal Side of Science Lebofsky L. A.* Lebofsky N. R. Teaching Planetary Science in Elementary Schools Strom R. G.* Greenberg R. J. Magisos M. Kovoord R. E. Croft S. Image Processing for Teaching and the Center for Image Processing in Education Lockwood J.* Strom R. G. Greenberg R. J. Magisos M. Kolvoord R. E. Croft S. Image Processing for Teaching: a High School Teacher's Perspective Mouginis-Mark P. J.* Taylor G. J. Hawke B. R. Exciting the Community about Planetary Sciences - Experiences of the Hawaii Space Grant College Program Dasch E. J.* Rocks and Stars: the 77% Solution Barlow N. G.* Dispelling the Reservations many Young Women have about Science Barnes C.* Academic Opportunities for Planetary Scientists Wednesday, March 18, 1992 ANTARCTIC MICROMETEORITES AND LDEF 1:30 p.m. Room C Chair(s): D. E. Brownlee H. A. Zook Maurette M. Immel G. Perreau M. Pourchet M. Vincent C. Kurat G.* The 1991 Euromet Collection of Micrometeorites at Cap-Prudhomme, Antarctica: Discussion of Possible Collection Biases Maurette M. Brownlee D. E.* Joswiak D. J. Sutton S. R. Antarctic Micrometeorites Smaller than 50 Micrometers Koeberl C.* Kurat G. Presper T. Brandstatter F. Maurette M. Bulk Major and Trace Element Analyses of Unmelted Micrometeorites from Cap Prudhomme, Antarctica Sutton S. R.* Prinz M. Maurette M. Nehru C. E. Weisberg M. K. Bajt S. Antarctic Micrometeorites: Trace Element Contents and Textures of 50 to 100 Micrometer Particles Alexander C. M. O'D.* Maurette M. Swan P. Walker R. M. Studies of Antarctic Micrometeorites Nishiizumi K. Arnold J. R.* Klein J. Middleton R. Brownlee D. E. Hagen E. H. Faure G. 10Be and 26Al in Individual Cosmic Spherules from Antarctica Klock W.* Beckerling W. Spettel B. Flynn G. Sutton S. Bulk Composition and Mineralogy of Antarctic Micrometeorites See T. H.* Mack K. S. Warren J. L. Zolensky M. E. Continued Investigation of the Impact Flux on the Long Duration Exposure Facility by the Meteoroid and Debris Special Investigation Group McDonnell J. A. M.* LDEF's Space Exposure Yields Hypervelocity Impact Penetration Relationships Coombs C. R. Atkinson D. R.* Wagner J. D. Crowell L. B. Allbrooks M. Watts A. J. Environment Modelling in Near-Earth Space: Preliminary LDEF Results Bernhard R.* Horz F. Compositional Variety of Particles Encountered by LDEF's Trailing Edge Amari S. Foote J. Simon C. Swan P. Walker R. M. Zinner E.* Jessberger E. K. Lange G. Stadermann F. SIMS Chemical Analysis of Extended Impacts on the Leading and Trailing Edges of LDEF Experiment A0187-2 Stephan T.* Stadermann F. J. Cramer H.-G. Zehnpfenning J. TOF-SIMS Analysis of LDEF Impact Residues Wednesday, March 18, 1992 SOLAR WIND AND COSMIC RAY IRRADIATION 1:30 p.m. Room D Chair(s): K. Marti L. Schultz Wieler R.* Bauer H. Signer P. Krypton and Xenon from Solar Energetic Particles in a Lunar Ilmenite Pedroni A.* Begemann F. Weber H. W. Solar Noble Gases in Mineral Separates of ACFER 111 Rider P. E.* Becker R. H. Pepin R. O. Measurement of Solar Wind Noble Gas Composition in Lunar Soils by In Vacuo Acid Etching Kim Y. Kim J. S. Marti K. Kerridge J. F.* On the Isotopic Signature of Recent Solar-Wind Nitrogen Reedy R. C.* Solar-Proton Production of Neon and Argon Sisterson J. M.* Koehler A. M. Jull A. J. T. Donahue D. J. McHargue L. Reedy R. C. Englert P. A. J. Cross Section Measurements for the Production of Carbon-14 and Beryllium-10: Improved Estimates for Cosmogenic Nuclide Production Rates Fink D. Klein J.* Dezfouly-Arjomandy B. Middleton R. Herzog G. F. Albrecht A. 41Ca in the Norton County Aubrite Michlovich E.* Lipschutz M. Shortreed M. Vogt S. Elmore D. Cosmogenic Nuclide Depth Profiles in the Iron Meteorite, Canyon Diablo Vogt S.* Herzog G. F. Fink D. Klein J. Middleton R. Cosmogenic Nuclides in the H3 Chondrite Dhajala Traub-Metlay S. G.* Benoit P. H. The Natural Thermoluminescence of Meteorites with High 26-Al Contents: Unusual Orbital Histories in Ordinary Chondrites? Eugster O.* Michel Th. Niedermann S. Wang D. Yi W. History of 27 Chinese and 10 Other Chondrites Derived from Solar, Cosmic-Ray Produced, Radiogenic and Fissiogenic Noble Gases Nishiizumi K. Arnold J. R. Caffee M. W.* Finkel R. C. Southon J. Exposure History of Separated Phases from the Kapoeta Meteorite Schultz L.* Weber H. W. Noble Gases in Metal and Silicates of the IIE Iron Meteorite Watson Thursday, March 19, 1992 MARS SURFACE AND ATMOSPHERE THROUGH TIME: SURFACE PROPERTIES AND PROCESSES 8:30 a.m. Room A Chair(s): R. G. Burns R. B. Singer Singer R. B.* McSween H. Y. Jr. Composition of the Martian Crust: Evidence from Spectroscopy and SNC Meteorites Murchie S.* Erard S. Bishop J. Mustard J. Bibring J.-P. Langevin Y. Head J. Pieters C. The Forms and Evolution of Water in Martian Soil: Evidence from ISM Imaging Spectroscopy Banin A.* Analog Studies of Nanophase Iron Oxides in Mars Soil Bell J. F. III* Morris R. V. Adams J. B. Relative Abundances of Poorly- and Well-Crystalline Ferric Oxides in the Martian Soil and Dust from Telescopic Data and Terrestrial Spectral Analog Studies Burns R. G.* Chemical Weathering on Mars: Rates of Dissolution and Oxidation of Ferromagnesian Silicate Minerals Carr M. H.* Post-Noachian Erosion Rates: Implications for Mars Climate Change Frey H.* Thermal History and Climatic Implications of Early Hesperian Ages for Presumed Noachian Age Volcanic Flows on Mars Rotto S. L.* Tanaka K. L. Chryse Planitia Region, Mars: A Summary of Geologic/ Geomorphologic Mapping Results De Hon R. A.* Pani E. A. Duration and Rates of Discharge Through a Martian Outflow System: Maja Valles Mellon M. T.* Jakosky B. M. Stability and Diffusion Time Scales of Water Ice in the Martian Regolith Cave J. A.* Martian Volcanoes and Ground-Ice: Evidence for the Localised Enrichment of Sub-Surface Ice by Juvenile Volatiles Gulick V. C.* Baker V. R. Martian Hydrothermal Systems: Some Physical Considerations Thursday, March 19, 1992 COSMIC DUST AND COMETS 8:30 a.m. Room B Chair(s): D. J. Lindstrom L. P. Keller Flynn G. J.* Sutton S. R. Element Abundances in Stratospheric Cosmic Dust: Indications for a New Chemical Type of Chondritic Material Lindstrom D. J.* Scandium/Iron and Cobalt/Iron Ratios as Indicators of the Sources of Stratospheric Dust Particles Fomenkova M.* Chang S. Mukhin L. Classification of Carbonaceous Component in Comet Halley "CHON" Particles Thomas K. L.* Keller L. P. Blanford G. Klock W. McKay D. S. Carbon in Anhydrous Interplanetary Dust Particles: Correlations with Silicate Mineralogy and Sources of Anhydrous IDPS Bradley J. P.* Humecki H. J. Germani M. S. Interplanetary Dust Analogues for Infrared Silicate Emission from Comets Keller L. P.* Thomas K. L. McKay D. S. Thermal Processing of Cosmic Dust: Atmospheric Heating and Parent Body Metamorphism Flynn G. J.* Sutton S. R. Thomas K. L. Keller L. P. Klock W. Zinc Depletions and Atmospheric Entry Heating in Stratospheric Cosmic Dust Particles Nier A. O.* Schlutter D. J. Helium Release from Interplanetary Dust Particles in Laboratory Studies Simulating the Heat Pulse Experienced by Particles During Atmospheric Entry Herzog G. F.* Hall G. S. Brownlee D. E. Mass Fractionation of Nickel Isotopes in Metallic Cosmic Spherules Collected from Deep-Sea Sediments Blake D. F. Fleming R. H.* Sequential Analyses of IDPs by LVSEM, TOF-SIMS, SIMS, and AEM Rietmeijer F. J. M.* Interplanetary Dust Particle L2005T12 Directly Linked to Type CM Chondrite Petrogenesis Thiel K.* Grun E. Gebhard J. Kolzer G. Artificial "Regolith" of an Ice-Dust Body Under Space Conditions: Dust Mantle Dynamics and Phenomenology During KOSI 9 Kochan H.* Grun E. Gebhard J. Benkhoff J. Kuhrt E. Lammerzahl P. Lorenz E. Mohlmann D. Roessler K. Seidensticker K. J. Thomas H. Bistable Activity of a Cometary Analogous Ice-/Mineral Mixture During Insolation Thursday, March 19, 1992 PLANETARY GEOCHEMISTRY 8:30 a.m. Room C Chair(s): C. J. Capobianco H. E. Newsom Grove T. L.* Ehlers K. E. Jercinovic M. J. Zervas D. A. Effect of Oxygen Fugacity on Partitioning of Ni and Co Between Olivine and Silicate Melt: Implications for Eucrite Parent Body Evolution Amelin A. A. Capobianco C. J.* The Partitioning of Co and Ni in a Simple Metal/Silicate System as a Function of Oxygen Fugacity and Temperature McFarlane E. A.* Drake M. J. Rubie D. C. Gasparik T. Mantle Mineral/Silicate Melt Partition Coefficients Matsuda J. Sudo M. Ozima M.* Noble Gas Partition Between Metal and Silicate Under High Pressure Jakes P.* Sen S. Matsuishi K. Reid A. M. King E. A. Casanova I. Silicate Melts at Super Liquidus Temperatures: Reduction and Volatilization Hillgren V. J.* Capobianco C. J. Drake M. J. Metal-Silicate Partitioning Behavior of Moderately Siderophile Elements in Ni-Rich Systems Newsom H. E.* Noll P. D. Jr. Slane F. A. Beserra T. B. Siderophile Element Abundances and Behavior Borisov A.* Palme H. Holzheid A. Spettel B. Dingwell D. B. O'Neill H. St. C. The Origin of Highly Siderophile Elements in the Upper Mantle of the Earth: An Experimental Approach Dickinson T. L. Lofgren G. E. Casanova I.* High Temperature Reduction of Silicon in Enstatite Meteorites: Evidence from the Experimental Studies of Indarch Shaffer E. E.* Burnett D. S. Minor Element Variations in Plagioclase Smyth J. R.* McCormick T. C. Hydrous Silicates in the Upper Mantles of Terrestrial Planets Ross D. K.* Elthon D. Variable Size of the Crystallizing Boundary Layer During Formation of the Stillwater Layered Complex, Montana Tatsumoto M.* Nakamura Y. Premo W. R. Boyd F. R. Elemental Distribution of U, Th, and Pb in Peridotite Xenoliths: Implications for the Pb Isotopic Evolution of the Moon Thursday, March 19, 1992 MARS SURFACE AND ATMOSPHERE THROUGH TIME: ATMOSPHERE AND SURFACE-ATMOSPHERE INTERACTIONS 1:30 p.m. Room A Chair(s): G. J. Flynn A. P. Zent Jakosky B. M.* Out on a Limb: Mars Atmospheric Opacity During the Last Hundred Years Martin T. Z.* Richardson M. I. Global Behavior of Martian Atmospheric Dust During the Viking Era Flynn G. J.* The Contribution of Meteoritic Material to the Dust and Aerosols in the Atmosphere of Mars Moroz V. I.* Hazes and Clouds on Mars: Some of the Phobos Mission Results Lee P.* Dollfus A. Polarimetric Survey of Crystal Clouds on Mars Zent A. P.* Haberle R. M. Houben H. Jakosky B. M. Coupled Subsurface Atmosphere Boundary Layer Model of H2O on Mars: Sensitivity Studies Wanke H.* Dreibus G. Jagoutz E. Mukhin L. M. Volatiles on Mars: The Role of SO2 Dollfus A.* Zimbelman J. Martian Surface Texture and Wind Effect Implications Maxwell T. A.* Craddock R. A. Geologic Effects of Atmosphere Loss on Mars: Evidence from Highland Erosion Barlow N. G.* Quantifying Crater Degradation in Maja Valles and Memnonia, Mars Craddock R. A.* Maxwell T. A. Morphologic Variations of Degraded Impact Craters in the Martian Highlands Howard A. D.* Simulated Erosion of Martian Heavily Cratered Terrain Thursday, March 19, 1992 STARDUST 1:30 p.m. Room B Chair(s): G. R. Huss U. Ott Huss G. R.* Hutcheon I. D. Wasserburg G. J. Stone J. Presolar (?) Corundum in the Orgueil Meteorite Newton J.* Arden J. W. Pillinger C. T. Carbon and Nitrogen Isotope Studies of a Suite of Type CO3 Carbonaceous Chondrites Russell S. S. Arden J. W.* Pillinger C. T. Adrar 003: An Unequilibrated Ordinary Chondrite Rich in Pristine Interstellar Grains Hoppe P.* Amari S. Zinner E. Lewis R. S. Just How Many Types of Interstellar Carbon? Amari S.* Hoppe P. Zinner E. Lewis R. S. Interstellar SiC with Unusual Isotopic Compositions Verchovsky A. B.* Ott U. Russell S. S. Pillinger C. T. Fisenko A. V. Shukolyukov Yu. A. Carbon, Nitrogen and Noble Gases in Diamond-rich Residues of the Efremovka CV3 Chondrite Lewis R. S.* Amari S. Interstellar Murchison Graphite: How Many Noble Gas Components? Nichols R. H. Jr.* Hohenberg C. M. Hoppe P. Amari S. Lewis R. S. 22Ne-E(H) and 4He in Single SiC and 22Ne-E(L) in Single C-alpha of Known C- Isotopic Compositions Richter S. Ott U.* Begemann F. S-process Isotope Anomalies: Neodymium, Samarium, and a Bit More of Strontium Prombo C. A.* Podosek F. A. Amari S. Lewis R. S. S-Process Sr and Ba in SiC from Murchison Series KJ Alexander C. M. O'D. Swan P. D. Walker R. M.* Continued In Situ Studies of Interstellar Grains in Primitive Meteorites Bernatowicz T. J.* Amari S. Lewis R. S. TEM Studies of a Circumstellar Rock Clayton D. D.* Brown L. E. New Ideas for SiC: Mg Burning in AGB Shell Flashes Thursday, March 19, 1992 TERRESTRIAL IMPACTS AND THE K/T BOUNDARY 1:30 p.m. Room C Chair(s): A. R. Hildebrand E. M. Shoemaker Shoemaker E. M.* Izett G. A. Stratigraphic Evidence from Western North America for Multiple Impacts at the K/T Boundary Hartung J.* Kracher A. Anderson R. Plocher O. Manson Impact Structure Rocks: Evidence for an Exotic Component Anderson R. R.* Hartung J. B. Reagan M. K. Bell M. S. Plocher O. First Results from the Manson Impact Structure Core-Drilling Project: Preliminary Observations and Interpretations from the M-1 Core Schultz P. H.* Grant J. Collins W. Lopez J. P. Toselli A. J. Castellanos T. G. Rio Cuarto Crater Field Bunch T. E.* Schultz P. H. A Study of the Rio Cuarto Loess Impactites and Chondritic Impactor Pevzner L. A. Kirjakov A. F. Vorontsov A. K. Masaitis V. L. Mashchak M. S. Ivanov B. A.* Vorotilovskaya Drillhole: First Deep Drilling in the Central Uplift of Large Terrestrial Impact Crater Quezada-Muenton J. M. Marin L. E. Sharpton V. L.* Ryder G. Schuraytz B. C. The Chicxulub Impact Structure: Shock Deformation and Target Composition Brett R.* Anhydrite: A Lethal Target Rock at the Chicxulub Impact Site Vickery A. M.* Kring D. A. Melosh H. J. Ejecta Associated with Large Terrestrial Impacts: Implications for the Chicxulub Impact and K/T Boundary Stratigraphy Hildebrand A. R.* Stansberry J. A. K/T Boundary Ejecta Distribution Predicts Size and Location of Chicxulub Crater Bohor B. F.* Betterton W. J. Ejection and Dispersal Mechanisms of the K/T Impact Glass B. P.* Wu J. Impact Ejecta Associated with the Australasian and North America Microtektite Layers Delano J. W.* Liu Y.-G. Schmitt R. A. Bouska V. Geochemistry and Origin of Moldavite Tektites Thursday, March 19, 1992 POSTER SESSION II: EXOBIOLOGY 7:00 - 9:00 p.m. LPI Chair(s): None Ivanov M. V. Lein A. Yu. Mukhin L. M. Geochemical Evidences of Methane-Producing Bacteria's Activity in Rocks of Mars Thursday, March 19, 1992 POSTER SESSION II: MARS SPECTRA: OBSERVATIONAL DATA/LABORATORY ANALYSIS 7:00 - 9:00 p.m. LPI Chair(s): None Reyes D. P. Significance of Komatiite: Thermal Emission Spectroscopy of Komatiite for Remote Sensing of Planetary Surfaces Ramsey M. S. Christensen P. R. The Linear "Un-Mixing" of Laboratory Thermal Infrared Spectra: Implications for the Thermal Emission Spectrometer (TES) Experiment, Mars Observer Bishop J. L. Pieters C. M. Burns R. G. Ferrihydrite Found in Fe-rich Montmorillonite and its Relationship to the Reflectance Spectra of Mars Vaniman D. T. Heiken G. Wohletz K. Blacic J. Palagonites and Martial Soil Simulants Head J. N. Singer R. B. Geissler P. E. Multispectral Study of Cerberus Dark Materials DeBraal J. D. Reed M. H. Plumlee G. S. Preliminary Results of Computer Modeled Near oC Water-Rock Interactions at the Martian Surface Merenyi E. Miller J. S. Singer R. B. Compositional Variations on the Surface of Mars: Mixing Model Analysis from a Telescopic Spectral Image Vempati R. K. Morris R. V. Lauer H. V. Jr. Spectral Properties of Cr Substituted Goethites and Hematites Roush T. L. Martin T. Z. Pollack J. B. Analysis of Mariner 7 Thermal Infrared Spectra of Mars and Comparison to Recent Airborne Observations Edgett K. S. Geissler P. E. Herkenhoff K. E. Mars: The Composition of Dunes and Other Dark Surficial Material Tejfel V. G. Sinyaeva N. V. Aksenov A. N. Kharitonova G. A. The Experience of the Mars Normal Albedo and Limb Darkening Coefficients Mapping from the Observations During 1990 Opposition Miller J. S. Singer R. B. Wells W. K. Weller L. Radiance Factor Calibration of 1988 Visible and Near-IR Spectral Images of Mars McEwen A. S. Temporal Variability of the Surface and Atmosphere of Mars: Viking Orbiter Color Observations Erard S. Drossart P. Bibring J.-P. Langevin Y. Pinet P. Chevrel S. Aerosol Contribution to the Reflectance Spectra of Mars Roush T. L. Singer R. B. Analysis of Mars 1986 Seasonal South Polar Cap Spectrum Thursday, March 19, 1992 POSTER SESSION II: GEOLOGY/GEOPHYSICS: MARS/MERCURY 7:00 - 9:00 p.m. LPI Chair(s): None Kozak R. C. Batson R. M. Isbell N. K. Digital Geologic Maps of the Planets Harmon J. K. Slade M. A. Radar Mapping of Mercury Butler B. Muhlemann D. Slade M. A Comparison of the Radar Returns from the Icy Poles and Other Regions of Mars and Mercury Thompson T. W. O'Brien T. C. Jurgens R. F. Slade M. A. Moore H. J. Mars Quasi-Specular Echoes: Preliminary Results at 3.5-cm Wavelength Price K. H. Geologic Mapping of Part of Harmakhis Vallis Region, Mars: Evidence of Multiple Drainage Events Craddock R. A. Crumpler L. S. Aubele J. C. Central Chryse Planitia, Mars: Geologic Unit Interpretation from 1:500,000-Scale Mapping Chapman M. G. Geologic Mapping of the Granicus Valles, Mars McBride K. Geologic Mapping of the Elysium Region of Mars Parker T. J. Gorsline D. S. Preliminary Geologic Mapping of the MTM -55036 and -55043 Quadrangles, Southern Argyre Planitia, Mars Reidy A.-M. Sandford C. A. Frey H. Schultz R. A. A Search for Large Impact Basins in the Southern Hemisphere of Mars II: South Polar B? Strickland E. L. III Physical Properties of Deucalionis, Eos, and Xanthe-type Units in the Central Equatorial Region of Mars Murchie S. L. Erard S. Mustard J. F. Bibring J.-F. Langevin Y. Head J. W. Pieters C. M. The Geology of the Interior Deposits of Valles Marineris from Viking Images and ISM Imaging Spectroscopy Lucchitta B. K. Isbell N. K. Valles Marineris Volumes Thornhill G. D. Murray J. B. Rothery D. A. Day T. Cook A. C. Iliffe J. C. Muller J.-P. Comparison of Automatically Generated DEM of Tithonium Chasma with USGS Interpolated Contour DEM Sotin C. Smrekar S. Rosenqvist Y. Bibring J.-P. Topography of Tharsis Mons (Mars) Deduced from the ISM Experiment: Comparison with Radar Profiles Marchenkov K. I. Koshlyakov E. M. Zharkov V. N. Nikishin A. M. Investigation of Stresses in the Lithosphere of Mars: New Tectonic Interpretation Jons H.-P. Large-Scale Tectonic Features, Volcanoes, and Suspected Intrusions of the Ancient Uplands of Mars Frey H. New Mars Global Gravity Field: Correlation with Topography, Physiography and Large Impact Basins Murray J. B. Rothery D. A. Thornhill G. Muller J.-P. Cook T. Day T. Iliffe J. C. The Origin of Grooves and Crater Chains on Phobos Blumberg D. G. Greeley R. Influence of Surface Roughness on Windblown Sand: Earth, Mars, and Venus Thursday, March 19, 1992 POSTER SESSION II: TERRESTRIAL CRATERING: FIELD STUDIES 7:00 - 9:00 p.m. LPI Chair(s): None Feldman V. I. Sazonova L. V. Korotaeva N. N. Guseva L. B. Budkov G. K. Diaplectic Transformation of Minerals in Vorotilov Core, Puchezh-Katunk Astrobleme, Russia (Preliminary Data) Ivanov B. A. Petaev M. I. Mass and Impact Velocity of the Meteorite Formed the Sterlitamak Crater in 1990 Reimold W. U. Koeberl C. Pretoria Saltpan Impact Crater: Impact Glasses and Sulphide Spherules Koeberl C. Schultz P. H. Chemical Composition of Meteoritic and Impactite Samples from the Rio Cuarto Craters, Argentina Perry E. C. Winter D. J. Sagar B. Wu B. The Chicxulub Structure: Surface Manifestation and Possible Sulfur Isotope Signature Grant J. A. Schultz P. H. Gradation of the Rio Cuarto Crater Field, Argentina Marin L. E. Quezada-Muneton J. M. Sharpton V. L. Ryder G. Schuraytz B. C. Dalrymple G. B. Age Constraints on the Chicxulub Impact Structure: K/T or Not? Bohor B. F. Brett R. Grieve R. A. F. Stoffler D. No Evidence of Shock Metamorphism in Cuba at K/T Boundary Pope K. O. Ocampo A. C. Biospheric Effects of the Proposed Chicxulub K/T Bolide Halvorson K. McHone J. F. Vredefort Coesite Confirmed with Raman Spectroscopy Pilkington M. Grieve R. A. F. The Geophysical Signature of Terrestrial Impact Craters Thursday, March 19, 1992 POSTER SESSION II: MARS: AVALANCHES 7:00 - 9:00 p.m. LPI Chair(s): None Sullivan R. Three-Dimensional Stability Back-Analysis of Small Martian Avalanche Chutes Lucchitta B. K. Ferguson H. M. A Martian Landslide Caught in the Act? Thursday, March 19, 1992 POSTER SESSION II: MARS: ATMOSPHERE 7:00 - 9:00 p.m. LPI Chair(s): None Nemchinov I. V. Shuvalov V. V. The Explosion in the Atmosphere of Mars Caused by a High-Speed Impact of Cosmic Bodies Musselwhite D. S. Drake M. J. Swindle T. D. Production of the Martian Atmosphere by 2-Stage Outgassing of an Early Magma Ocean Zakharov A. V. Erosion of the Martian Atmosphere on Plasma Measurements Thursday, March 19, 1992 POSTER SESSION II: PLANETARY CRATERING 7:00 - 9:00 p.m. LPI Chair(s): None Sugita S. Matsui T. Topographic Evolution of the Moon by Impacts During Heavy Bombardment Hartmann W. K. The "Voyager Paradigm" of Planetary Cratering: Further Unabashed Revisionism Hartmann W. K. Gaskell R. W. Crater Saturation Equilibrium in Ancient Uplands: Preliminary Results of New Modelling Thursday, March 19, 1992 POSTER SESSION II: IMPACTS AND BOUNDARY PROBLEMS 7:00 - 9:00 p.m. LPI Chair(s): None Liu Y.-G. Schmitt R. A. Permian/Triassic Boundary, Carnic Alps Austria, Revisited; Correlations with Ce Anomalies, Delta 13C, and Siberian Trap Flood Basalts, 1 Liu Y.-G. Schmitt R. A. Permian/Triassic Boundary, Carnic Alps Austria, Revisited; Correlations with Ce Anomalies, Delta 13C, and Siberian Trap Flood Basalts, 2 Gilmour I. Russell S. S. Pillinger C. T. Lee M. Arden J. W. Origin of Microdiamonds in KT Boundary Clays Byerly G. R Lowe D. R. Exotic Nickel-Chromites in Impact Spherules from the Archean Barberton Greenstone Belt Lowe D. R. Byerly G. R. Depositional Mechanics of Impact-Produced Debris in the Archean Barberton Greenstone Belt, South Africa Thursday, March 19, 1992 POSTER SESSION II: MARS: GLACIATION 7:00 - 9:00 p.m. LPI Chair(s): None Lockwood J. F. Kargel J. S. Strom R. B. Thumbprint Terrain on the Northern Plains: A Glacial Hypothesis Kargel J. Strom R. Lockwood J. Shaw J. Subglacial and Glaciomarine Processes in the Martian Northern Plains Metzger S. M. The Eskers of New York State: Formation Process Implications and Esker-like Features on the Planet Mars Jons H.-P. Fossil Glaciations in the Environs of the South Pole, Mars? Thursday, March 19, 1992 POSTER SESSION II: MARS: CHANNELS/OCEANS 7:00 - 9:00 p.m. LPI Chair(s): None Rotto S. L. Tanaka K. L. Channels and Basin Materials of Chryse and Acidalia Planitiae, Mars Grin E. A. Cabrol N. A. Modeling Martian Channels by Bifurcation Theory and Differential Topology: Arguments for Drainage of Subsurface Aquifer Cabrol N. A. Grin E. A. Recurrent Rules in Martian Channel Organization: Implication for Their Formation Sahuaro High School Astronomical Research Classes of 1991 Lockwood J. F. Oceans on Mars: A Crater/Frequency Analysis by Elevation of the Northern Plains Parker T. J. Gorsline D. S. "Sourceless" Outflow Channels and Stem Valleys on Mars Scott D. H. Dohm J. M. Mars Highland Channels: An Age Reassessment Goldspiel J. M. Squyres S. W. Slade M. A. Jurgens R. F. Zisk S. H. New Radar-Derived Topography of Ancient Aqueous Sedimentation Basins on Mars Thursday, March 19, 1992 POSTER SESSION II: CHONDRITE STUDIES 7:00 - 9:00 p.m. LPI Chair(s): None Fisher D. S. Burns R. G. The Noblesville Meteorite: Mechanism of Oxidation of Iron in Ordinary Chondrites Induced by Aerated Icewater DeHart J. M. Keller L. Prothroe W. Lofgren G. E. TEM and Cathodoluminescence Spectroscopic Studies of Type A Chondrule Mesostases Fisher D. S. Burns R. G. Mossbauer Spectra of H-5 Chondrites from Antarctica Brearley A. J. Mineralogy of Fine-Grained Matrix in the Ivuna CI Carbonaceous Chondrite Bourcier W. L. Zolensky M. E. Computer Modeling of Aqueous Alteration on Carbonaceous Chondrite Parent Bodies Wolf S. F. Lipschutz M. E. Compositional Differences Among Antarctic Populations: Discriminant Analysis of H Chondrites from Victoria Land and Queen Maud Land Garrison D. H. Bogard D. D. 39Ar-40Ar Dating of Shock-Melted Phases of the Chico Chondrite and Implications for K-Ar Dating of Impact Melts Benoit P. H. Sears D. W. G. Metallographic Cooling Rate Differences Between Antarctic and Non-Antarctic H5 Chondrites and Some Implications McSween H. Y. Jr. Labotka T. C. Changes in Redox State During Ordinary Chondrite Metamorphism Ming D. W. Yang S. V. Golden D. C. Thomas K. L. Keller L. P. Krivian K. Barrett R. A. Zolensky M. E. Method for the Stabilization and Characterization of Phyllosilicates in Carbonaceous Chondrites Sutton S. R. Spanne P. Rivers M. L. Jones K. W. Computed Microtomography (CMT) of Extraterrestrial Objects Using a Linear Photodiode Array Detector Traub-Metlay S. Benoit P. Cassidy W. Establishment of a Thermoluminescence Facility at the University of Pittsburgh Delaney J. S. Sutton S. R. Bajt S. Smith J. V. In Situ MicroXANES Determination of Ferrous/Ferric Ratio in Terrestrial and Extraterrestrial Plagioclase: First Reconnaissance Thursday, March 19, 1992 POSTER SESSION II: SOLAR WIND/COSMIC RAY IRRADIATION 7:00 - 9:00 p.m. LPI Chair(s): None Futagami T. Ozima M. Nagai S. Aoki T. Thermal Behavior of Noble Gases Implanted into Minerals Mathew K. J. Michel R. Rao M. N. Xenon Production Cross Sections by High Energy Protons on Barium Targets Masarik J. Chochula P. Povinec P. Production of Cosmogenic Nuclides in Extraterrestrial Objects Albrecht A. Vogt S. Herzog G. F. Middleton R. Dezfouly-Arjomandy B. Fink D. Klein J. 26Al, 10Be, and 41Ca in Mesosiderites Jull A. J. T. Donahue D. J. Reedy R. C. 14C Depth Profile in Lunar Rock 68815 Nichols R. H. Jr. Hohenberg C. M. Goswami J. N. Spallation-produced 21Ne in Individual Orgueil Olivines Benoit P. H. Sears D. W. G. McKeever S. W. S. Natural Thermoluminescence and Terrestrial Ages of Meteorites: Age Clustering in the Saharan Collection Thursday, March 19, 1992 POSTER SESSION II: COSMIC DUST 7:00 - 9:00 p.m. LPI Chair(s): None Fomenkova M. Kerridge J. Marti K. McFadden L. Iron-rich Particles in Comet Halley Dust Kurat G. Presper T. Brandstatter F. Maurette M. Koeberl C. CI-like Micrometeorites from Cap Prudhomme, Antarctica Marov M. Ya. Kolesnichenko A. V. Skorov Yu. V. Simulation of the Nonstationary Processes in the Vicinity of Cometary Nuclei Radicati di Brozolo F. Fleming R. H. Mass Spectrometric Observation of Organic Species in a Single IDP Thin Section Szydlik P. P. Flynn G. J. A Model for the Internal Temperature Distribution of Micrometeorites During Atmospheric Entry Heating Thomas K. L. Keller L. P. Flynn G. J. Sutton S. R. Takatori K. McKay D. S. Bulk Compositions, Mineralogy, and Trace Element Abundances of Six Interplanetary Dust Particles Thursday, March 19, 1992 POSTER SESSION II: DUST ENVIRONMENT IN EARTH ORBIT 7:00 - 9:00 p.m. LPI Chair(s): None Coombs C. R. Atkinson D. R. Wagner J. D. Allbrooks M. Damage Areas on LDEF Aluminum Panels: Preliminary Results Watts A. J. Atkinson D. R. Crowell L. B. Coombs C. R. Impact Effects and Optical Scatter Tanner W. G. McDonald R. A. Alexander W. M. Maag C. R. Experimental and Theoretical Analyses of Hypervelocity Penetration Parameters for Thin Films Flown in Space McDonald R. A. Tanner W. G. Jr. Alexander W. M. A Molecular Dynamic Study of the Thermodynamic Behavior of a Thin Film Undergoing Hypervelocity Penetration Tsou P. Albee A. L. Effects of Aerogel Density on Intact Capture Tuzzolino A. J. Response and Transmission Characteristics of Thin PVDF Copolymer Dust Detectors Jackson A. A. Zook H. A. The Spatial Density Structure of Planet-Shepherded Interplanetary Dust Crowell L. B. Gravito-Magnetic Orbits for Micron Sized Particles Thursday, March 19, 1992 POSTER SESSION II: ASTEROIDS AND COMETS 7:00 - 9:00 p.m. LPI Chair(s): None Reed K.L. Gaffey M.J. A Search for Meteor Spectra from Meteor Showers Associated with S-Type Near-Earth Asteroids Graf Th. Marti K. On the Delivery of Meteorites and Near-Earth Asteroids Holsapple K. A. Calculations of Catastrophic Disruptions of Asteroids Davis D. R. Farinella P. Carpino M. Asteroid Collision Frequencies: Variations in Space and Time Davis D. R. Friedlander A. L. Jones T. McAdams J. V. Missions to Near-Earth Asteroids: SEI Milestones on the Way to Mars Gurley J. G. Cheng R. K. VEER: Countermeasures Against the Threat of Asteroid Impact Duxbury N. S. Brown R. H. 2-Dimensional Modeling of the Cometary Phase Transition Within a Range of Temperatures Goguen J. D. Light Scattering by Lunar-Like Particle Size Distributions Thursday, March 19, 1992 POSTER SESSION II: PLANETARY GEOCHEMISTRY 7:00 - 9:00 p.m. LPI Chair(s): None Zebib A. Linear and Weakly Non-Linear Variable Viscosity Convection in Spherical Shells Harper C. L. Jr. Jacobsen S. B. 146,147Sm-142,143Nd Systematics of Early Terrestrial Differentiation Jakes P. Reid A. M. Casanova I. Excess Heat and the Early Planet Evolution Mao H. Hemley R. J. Ultrahigh Pressure Studies of Hydrogen Jochum K. P. Palme H. Incompatible Elements in Earth, Moon, EPB and SPB: A Comparison Jones J. H. Walker D. Pickett D. A. Murrell M. T. An Experimental Study of Partitioning between Carbonate and Silicate Liquids Taylor L. A. Jerde E. A. Crozaz G. Sobolev N. V. Sobolev V. N. Diamondiferous Eclogites from Yakutia, Siberia: Evidence for the Evolution of Cratons Kargel J. S. The Compositions of Planetary Cores and Mantles Socki R. A. Romanek C. S. Gibson E. K. Stewart D. R. Carbon Isotopic Composition of Precambrian Sediments Extracted by Stepped Combustion Norman M. D. A Geochemical Model for the Enriched Crust and Depleted Mantle of Mars Friday, March 20, 1992 OFFERINGS FROM THE MOON 8:30 a.m. Room A Chair(s): C. R. Coombs B. Fegley Jr. Hood L. L.* Deflection of Solar Wind Ions by Lunar Magnetic Fields: Implications for Resource Utilization Keller L. P. McKay D. S.* Impact Glasses and Vapor Condensates in Apollo 11 Soil 10084 Fogel R. A.* Rutherford M. J. C-O-S-Cl Volatiles in Primitive Lunar Glasses: FTIR and EM Analyses of Apollo 15 Green Glasses Fegley B. Jr.* Lunar Volcanic Gases: The Predicted Presence of Chlorofluorocarbon Gases Therriault A. M.* Horz F. Cintala M. J. Cardenas F. Haynes G. L. Fractionation Trends During Impact Comminution of Modally Controlled Regoliths Allen C. C. Hines J. A. Altemir D. A.* McKay D. S. Sintering of Lunar Simulant Basalt Antonenko I.* Metallic Iron in Lunar Sample 79002,2030 Taylor L. A.* McKay D. S. Graf J. Patchen A. Wentworth S. Oder R. Jerde E. Magnetic Beneficiation of High-Ti Mare Basalts: Petrographic Analyses Allen C. C.* McKay D. S. Morris R. V. Hydrogen Reduction of Lunar Simulant Glass Agosto W. N.* Electrolytic Production of Lunar Iron and Oxygen at Room Temperature Friday, March 20, 1992 "ACAPULCOITES" AND STONY-IRON METEORITES; METEORITE ORGANICS 8:30 a.m. Room B Chair(s): K. Keil J. W. Morgan Zipfel J.* Kennedy A. K. Hutcheon I. D. Spettel B. Palme H. Thermal History of the Acapulco Meteorite Pellas P.* Fieni C. 244Pu Content of Phosphates and Cooling History of Acapulco Meteorite Kim Y. Kim J. S. Marti K.* Search for N and Xe Carriers in the Acapulco Meteorite McCoy T. J.* Keil K. Mayeda T. K. Clayton R. N. Monument Draw and the Formation of the Acapulcoites Hutcheon I. D.* Olsen E. Zipfel J. Wasserburg G. J. Cr Isotopes in Differentiated Meteorites: Evidence for 53Mn Creaser R. A.* Papanastassiou D. A. Wasserburg G. J. Re-Os Isotope Study of Iron Meteorites Using Negative Thermal Ion Mass Spectrometry Esat T. M.* Bennett V. Disturbed Re-Os Isotope Systematics in IIIAB Iron Meteorites Walker R. J.* Morgan J. W. Horan M. F. Grossman J. N. Clarke R. S. Jr. Rhenium-Osmium Isotope Sytematics in Chondrites and Iron Meteorites Kennedy A. K.* Stewart B. W. Hutcheon I. D. Papanastassiou D. A. Wasserburg G. J. Partitioning of REE Between Phosphates and Silicates in Mesosiderites: Evidence for Differing Degrees of Equilibration Stewart B. W.* Papanastassiou D. A. Wasserburg G. J. Sm-Nd Chronology and Petrochemistry of Mesosiderites Tyburczy J. A. Tingle T. N. Ahrens T. J.* Becker C. H. Organic Mass Spectra of Shocked Murchison Meteorite Clemett S. J.* Maechling C. R. Zare R. N. Alexander C. M. O'D. Analysis of Polycyclic Aromatic Hydrocarbons in Seventeen Ordinary and Carbonaceous Chondrites Heymann D.* Search for Fullerenes in Meteorites I: Roasting of Fullerenes in Air Friday, March 20, 1992 GALILEO: GASPRA ENCOUNTER/ASTEROIDS 8:30 a.m. Room C Chair(s): C. R. Chapman F. Vilas Belton M. J. S.* Veverka J. Thomas P. C. Chapman C. R. Klaasen K. P. Neukum G. McEwen A. S. Head J. W. Davies M. Greeley R. Greenberg R. Pilcher C. B. Morrison D. Ingersoll A. P. Fanale F. Johnson T. V. The Galileo SSI Experiment at Gaspra: Overview and Expectations Helfenstein P.* Veverka J. Thomas P. C. Simonelli D. P. Carcich B. McEwen A. S. Head J. W. Murchie S. Chapman C. Belton M. Klaasen K. Fanale F. Galileo Imaging Team 951 Gaspra: Preliminary Albedos from Galileo Images Chapman C. R.* Davis D. R. Neukum G. Veverka J. Belton M. J. S. Johnson T. V. Morrison D. McEwen A. Galileo Imaging Team 951 Gaspra: Preliminary Galileo SSI Results on Craters, Collisions, and Regolith Thomas P. C.* Davies M. E. Simonelli D. Veverka J. Belton M. Galileo Imaging Team Gaspra's Shape and Surface Features: Comparison with Small Satellites Asphaug E.* Nolan M. C. Analytical and Numerical Predictions for Regolith Production on Asteroids Fanale F. P.* Clark B. E. BAR Plot Analysis of S Type Asteroid and Ordinary Chondrite Reflectance Spectra Gaffey M. J.* Narrowing the Search for Ordinary Chondrites Among the Large S-Type Asteroids: Identification and Tests of Three Prime Candidates Hiroi T.* Bell J. F. Takeda H. Pieters C. M. Spectral Comparison Between the S-Asteroids and Primitive Achondrites Britt D. T.* Lebofsky L. A. Spectral Variation Within Asteroid Classes Britt D. T. Bell J. F.* Haack H. Scott E. R. D. The Reflectance Spectrum of Troilite Granahan J. C.* Bell J. F. Recreating the Asteroid Belt of the Recent Past TO BE PRESENTED BY TITLE ONLY Snyder G. A. Lee D.-C. Taylor L. A. Jerde E. A. Halliday A. N. Nd and Sr Isotopic Constraints on High-Ti Basalt Volcanism at Mare Tranquillitatis Gaddis L. McEwen A. Pieters C. M. Sunshine J. Greeley R. Observations of Lunar Pyroclastic Deposits with Galileo SSI Multispectral Data Bell J. F. III Hawke B. R. Composition and Stratigraphy of the Plinius-Dawes Region of the Moon La Fave N. Wilson T. L. The Role of the Moon in Gravitational Wave Astronomy Lucey P. G. Bruno B. C. A Program of Systematic Study of the Effect of Noncompositional Factors on Telescopic Thermal Infrared Spectra of the Moon Rao A. S. P. Srinivas K. Geodynamic Signatures and Genesis of Anorthosite Massifs Wilson T. L. Is There a Standard Model of the Moon? Lucey P. G. Blewett D. Budney C. A Near-Infrared Imaging Survey of the Moon Wilson T. L. An Earth-Moon Baseline Neutrino Experiment Wilson T. L. Neutrino Astronomy of the Moon Wilson T. L. The Antineutrino Luminosity of the Moon Mardon A. A. The Utilization of Helmet Mounted Display (HMD) in Space Extra-Vehicular Suits and Lunar Extra-Vehicular Surface Suits Bell J. F. III Crisp D. Spatial Variability of CO and CO2 on Mars from Near-Infrared Imaging Spectroscopy Bell J. F. III Lucey P. G. McCord T. B. Ferric Mineralogy of the Martian South Polar Region Erard S. Drossart P. Bibring J.-P. Rosenqvist J. Chassefiere E. Near-Infrared Spectral Slope as a Clue to Aerosol Vertical Distribution on Mars de Grenier M. Pinet P. C. Chevrel S. Reflectance Geometric Corrections for a Global Spectral Mapping of Mars from Telescopic Near-Infrared Observations Rodionova Zh. F. Statistics of Martian Craters Evidences for a Dense Atmosphere in the Past Gibson E. K. Jr. Bustin R. Volatiles in Six Interplanetary Dust Particles Rietmeijer F. J. M. Endothermic Reactions Constrain Dynamic Pyrometamorphic Temperatures in Two Iron-Rich Interplanetary Dust Particles Maurette M. Kurat G. Presper T. Brandstatter F. Perreau M. Possible Causes of Depletion and Enrichment of Minor Elements in Antarctic Micrometeorites Bernhard R. Davidson W. Horz F. Preliminary Analysis of LDEF Instrument AO187-1, Location A11 Moroz L. V. Pieters C. M. Akhmanova M. V. Why the Surfaces of Outer Belt Asteroids are Dark and Red? Pluzhnik Ye. A. Velichko F. P. Reconstruction of Vesta Image Alexandrov Ju. V. Velichko F. P. Korokhin V. V. Krugly Yu. N. Shevchenko V. G. Occultation of the Star SAO 187255 by Titan: Titan's Atmosphere Murchie S. Helfenstein P. Head J. Domingue D. Hanson G. The Nature and Distribution of Albedo Variations on Dark and Light Materials on Ganymede Pappalardo R. Greeley R. Ridge and Trough Terrain and the Origin of Miranda's Coronae Young E. F. Binzel R. P. Stern S. A. A Frost Model for Pluto's Surface: Implications for Pluto's Atmosphere Starodubtseva O. M. Akimov L. A. Korochin V. V. Tejfel V. G. Longitudinal Variations of the Linear Polarization in Jupiter's Polar Regions Shkuratov Yu. G. Kachanov A. S. Voylov Yu. G. Melkumova L. Ya. Latynina I. I. Interference-Shadow Mechanism of the Negative Polarization for Metallic Powdered Surface (Preliminary Results) Starukhina L. V. Shkuratov Yu. G. Estimation of Solar-Flare-Induced Variation of Albedo for Atmosphereless Cosmic Bodies Moss B. E. Haskin L. A. Korotev R. L. Jolliff B. L. On Developing TAPIs (Time and Provenance Indicators); A Scenario for Robotic Lunar Sampling Followed by Analysis in Terrestrial Laboratories Minnitt R. C. A. Reimold W. U. Colliston W. P. The Vredefort Dome, South Africa: New Structural Geological Data from the Granite-Greenstone Terrane in the Southeastern Quadrant Colson R. O. Jolliff B. L. Haskin L. A. Inferring REE Substitution Reactions in Lunar Whitlockite Ringwood A. E. Hibberson W. Ware N. Kesson S. E. Petrogenesis of Kimberlites and Related Magmas Parmentier E. M. Sotin C. J. Three Dimensional Thermal Convection at High Rayleigh Number; Implications for the Structure and Evolution of Planetary Interiors Dupeyrat L. Sotin C. Parmentier E. M. Numerical Experiments on the Chemical Differentiation of a Convecting Plantary Interior: Possible Application to Venus Glukhovsky M. Z. Moralev V. M. Global Geological Processes and the Role of Tidal Energy in the Earth's and Other Planets Evolution Higuchi Y. Okada T. Sugiura N. Accretion of Fine Particles: An Optical Analysis of the Size Distribution and its Application to Determination of the Sticking Probability Ipatov S. I. Migration of Bodies During the Accumulation of Terrestrial Planets Kolvoord R. A. Greenberg R. Incipient Runaway Growth of Planets: Critical Physical Processes Stepinski T. F. Criteria for Magnetic Fields Regeneration in Accretion Disk Models of the Solar Nebula Vityazev A. V. Pechernikova G. V. Makogon Yu. F. Volatiles, Their Ices and Clathrates in Early Solar Nebula Ward W.R. Coorbital Corotation Torque KenKnight C. E. Magnetic Flocculation: The Metal-Silicate Separation Bischoff A. Palme H. Geiger T. Spettel B. Mineralogy and Chemistry of the EL-Chondritic Melt Rock Ilafegh-009 Eugster O. Lunar Regolith Residence Time of Apollo-16 Dimict Breccias Haskin L. A. Jolliff B. L. Colson R. O. Effects of REE3+ Saturation on the Substitution in Whitlockite of 2 REE3+ + Vacancy in Ca(IIA) for 3 Ca2+ Jerde E. A. Snyder G. A. Taylor L. A. Liu Y.-G. Schmitt R. A. Chemical Composition of Apollo 11 Mare Basalt Rocks: Evidence for Sample Heterogeneity in 10057 Jerde E. A. Snyder G. A. Taylor L. A. Apollo 11 Low-K Basalts: A Single Source and REEP Contamination Jolliff B. L. Wadhwa M. The Distribution of Rare Earth Elements Between Lunar Apatite and Whitlockite Korotev R. L. Composition of Impact Melts from Station 13 at Apollo 16 Lejkin G. A. Zabalueva E. V. Fainberg V. S. On the Surface Layers of the Lunar Regolith Grains Lindstrom M. M. Mittlefehldt D. W. Martinez R. R. Geochemical Studies of Apennine Front Coarse-Fines Particulates Morris R. V. Lauer H. V. Jr. Maturity of the 60013/14 Core Neal C. R. Hacker M. D. Taylor L. A. Schmitt R. A. Liu Y.-G. The Petrogenesis of Apollo 12 Mare Basalts, Part 2: Identification of Distinct Olivine and Pigeonite Suites, and Open-System Evolution Pieters C. M. Fischer E. Mustard J. Pratt S. Basu A. Spectral Properties of Agglutinate Separates from Soil 10084 Shearer C. K. Papike J. J. Intra-Crystalline Behavior of Trace Elements in Pyroxene from Mare Basalts with Different fO2-Crystallization Histories Shervais J. W. Vetter S. K. Major Element Chemistry of Apollo 14 Mare Basalt Clasts and Highland Plutonic Clasts from Lunar Breccia 14321: Comparison with Neutron Activation Results Snyder G. A. Taylor L. A. Large-Scale Convective Overturn of the Lunar Upper Mantle: Fact or Fancy? Snyder G. A. Taylor L. A. Neal C. R. Combined Equilibrium and Fractional Crystallization of a Magma Ocean and Formation of the Upper Mantle of the Moon Snyder G. A. Taylor L. A. Crozaz G. Zircon/Melt Partition Coefficients for the Rare-Earth Elements in Evolved Rocks: The Usefulness of Accessory Minerals in Petrogenetic Studies on the Earth and Moon Warren P. H. A Compilation of Key Petrologic Information on Pristine Nonmare Moon Rocks Basilevsky A. T. Burba G. A. Bobina N. N. The Project of 1:1,000,000-Scale Geologic Mapping of Venera and Vega Landing Sites, Venus Burba G. A. Shashkina V. P. Topographic Comparison of Coronae on Venus and Transylvanian Ring Structure on the Earth Fienen M. N. Schaber G. G. Tanaka K. L. Experimental Mapping of the V36 Quadrangle of Venus, Based on Magellan Data Kochemasov G. G. Tesserae in the Light of a New Tectonics of Lithospheric Waves Kochemasov G. G. Comparison of Blob Tectonics (Venus) and Pair Tectonics (Earth) Kryuchkov V. P. Tectonic Bedding as Deduced from Analysis of Linear Deformation Zones at Lavinia Planitia, Venus (Preliminary Results) Parfitt E. A. Head J. W. Radial Fracture Systems on Venus: Conditions of Formation Raitala J. Kauhanen K. Neyterkob Coronae on Venus Schultz R. A. Progress on the Search for Strike-Slip Faulting on Venus Crumpler L. S. Aubele J. C. Two Global Concentrations of Volcanism on Venus: Geologic Associations and Implications for Global Pattern of Upwelling and Downwelling Gulick V. C. Komatsu G. Baker V. R. Integrated Valley Systems on Venus: A Comparative Morphologic Study Ivanov M. A. Explosive Volcanism on Venus? Ivanov M. A. Venera 13 and 14 Landing Sites: Geology from Magellan Data Komatsu G. Baker V. R. Discharge Estimates for the Venus "Outflow" Channel Komatsu G. Baker V. R. Parker T. J. Global Distribution of Venusian Channels and Implications for Venus Volcanism Komatsu G. Gulick V. C. Kargel J. S. Baker V. R. Venus Lava Sapping Valleys Senske D. A. Regional Topographic Rises on Venus: Geology of Western Eistla Regio, Beta Regio, and Atla Regio Volkov V. P. Frenkel M. Ya. Venus Degassing Model in K-Ar System Zolotov M. Yu. A Model of the Physico-Chemical Evolution of the Venus Atmosphere as a Result of Volcanic CO2 Degassing Zolotov M. Yu. Pyrite-Magnetite or Magnetite-Hematite Mineral Assemblages as a Possible Buffer of the Composition of the Venus Atmosphere Belinkiy E. G. Venus: Improved North Pole Position from Venera-15, 16 Radar Survey Schultz P. H. Gault D. E. On Surviving Atmospheric Entry Stooke P. J. High Latitude Radar-Dark Parabolic Markings on Venus Wood C. A. Blount G. After Magellan: Concepts for the Next Generation of Venus Spacecraft Pinkerton H. Stevenson R. J. Rheological Properties of Basaltic Lavas Schultz R. A. Limitations on the Applicability of Byerlee's Law and the Griffith Criterion to Shallow Crustal Conditions Pinkerton H. Stevenson R. J. Rheological Properties of Silicic Lavas Cabrol N. A. Grin E. A. Sites of Residual Aquifers on Mars Through Channel Analysis Burba G. A. Transylvanian Ring Structure, Romania: Definition, Description, Possible Planetary Analogues Storzer D. Microtektite Hunting and Mineral Wool Shot Feldman V. I. Sazonova L. V. Korotaeva N. N. Crystallization Temperature of Melt Impact Rocks of Zhamanshin Astrobleme (USSR) Pedroni A. Evidence for Sorting Effects in the Regolith of the Kapoeta Parent Body Nazarov M. A. Karpenko S. F. Ljalikov A. V. Smolyar M. I. Kolesnikov E. M. Barsukova L. D. The Kara Impact Structure: Nd-Sr Isotopic Composition of an Impact Melt Nazarov M. A. Badjukov D. D. Alekseev A. S. The Kara Structure as a Possible K/T Impact Site Nazarov M. A. Badjukov D. D. Barsukova L. D. Kononkova N. N. Romasheva T. V. Chemical Relationship Between Kara Crater Rocks and K/T Glasses Badjukov D. D. Nazarov M. A. Guseva E. V. Shocked Rock Fragments from K/T Boundary Clay and Their Relevance to the Kara Impact Event Kashkarov L. L. Nazarov M. A. Suponeva I. V. Fission Track Dating of the Kara Impact Structure Pinkerton H. Wilson L. The Dynamics of Channel-Fed Lava Flows Norton G. E. Pinkerton H. The Physical Properties of Carbonatite Lavas: Implications for Planetary Volcanism Reimold W. U. Reid A. M. Jakes P. Zolensky M. Miller R. McG. A Magnetic Survey Across the Roter Kamm Impact Crater, Namibia Reimold W. U. Grieve R. A. F. Levin G. Kalkkop Crater in the Eastern Cape - A Good Candidate for an Impact Structure Black S. Macdonald R. Kelly M. Fallick A. E. Uranium Series and Oxygen Isotope Studies of the Peralkaline Rhyolites of Naivasha, Kenya Rift Valley Leach R. N. Schrodi S. J. Greeley R. Influence of Electrostatic Charges on the Movement of Dust by Wind Hildebrand A. R. Pilkington M. Grieve R. A. F. Robertson P. B. Penfield G. T. Recent Studies of the Chicxulub Crater, Mexico Plescia J. B. Compressive Strain Across Wrinkle Ridges in Arcadia Planitia Kusky T. M. Hoffman P. F. Oblique Rifting of the Coronation Margin at 1964 Ma: Evidence from the West Bay-Indin Lake Fault System Shaw J. Kargel J. S. Strom R. G. Terrestrial Subglacial Landforms as Analogs for Martian Landscapes Yakovlev O. I. Dikov Yu. P. Gerasimov M. V. Shock Vaporization of Granites: Experimental Results Premo W. R. Nd-Sr Isotopic Signature of the Pierre Shale: Target Material at the Manson Impact Site and Source of the Haitian Tektites (K-T Boundary)? Gerasimov M. V. Dikov Yu. P. Wlotzka F. Mukhin L. M. Laser Simulation of Equilibrium High-Temperature Vaporization Schmitt R. A. Twining D. S. A Causal Relationship Between Ir Peaking and Severe Delta 13C Decline at the K/T Boundary Liu Y.-G. Schmitt R. A. Absence of Zn, As, and Sb Enrichments Relative to North American Shale Composite in 11 Worldwide K/T Boundary Clays and in Shatsky Rise K/T Boundary Clays Torpedoes Hydrothermal-Smoker Poisoning Hypothesis for the Oceanic Mass Extinction M Robin E. Bonte Ph. Froget L. Jehanno C. Rocchia R. On the Origin of Cretaceous-Tertiary Boundary Spinels Langenhorst F. Deutsch A. Shock Effects in Quartz: Strong Dependence on the Pre-Shock Temperature Schultz R. A. What's the Difference Between a Rock and a Rock Mass (and Why Is It Important)? Schneid B. Greeley R. Volcanic Vents on Mars: Systematic Search and Classification Plescia J. B. Crisp J. Recent Elysium Volcanism - Effects on the Martian Atmosphere Chadwick D. J. Lucchitta B. K. Morgan P. Fault Dips in the Valles Marineris: A Photogrammetric Study Schultz R. A. Tanaka K. L. Growth of the Coprates Rise, Mars, as a Result of Lithospheric Folding Underwood J. R. Jr. Geologic Mapping, Claritas Fossae Region, Mars: Progress Report Zuber M. T. Should Lithospheric Flexure Due to the Load of the Martian Polar Layered Deposits Be Detectable with the Mars Observer Laser Altimeter? Croft S. K. Observational Limits on Catastrophic Disruption Suchardjevskiy S. M. Shafranovskii G. I. Balmasov E. L. The EPR Study of Impact Diamonds from Astroblemes Naumov M. V. Zeolitization of Impactites and Breccia in Puchezh-Katunki Astrobleme Migdisova L. F. Yaroshevsky A. A. Kononkova N. N. The Inclusion in the L-Chondrite Tsarev: New Type of Basaltic Matter in the Solar System Miyamoto M. McKay D. S. Lofgren G. E. Duke M. B. CaO Contents in Olivine: An Experimental Study Miyamoto M. Zolensky M. E. Infrared Diffuse Reflectance Spectra of Some Carbonaceous Chondrites Murty S. V. S. Solar Gases in Parsa Enstatite Chondrite Nagahara H. Mysen B. O. Shimizu N. Incongruent Evaporation of Diopside to Akermanite Nagahara H. Kushiro I. Mysen B. Olivine at Low Pressures and Its Implications for the Origin of Chondrules Pun A. Shearer C. K. Papike J. J. A Comparison Between a "Unique" Eucrite Clast from the Kapoeta Howardite and the Pasamonte Eucrite Robin E. Bonte Ph. Froget L. Jehanno C. Rocchia R. Ni-rich Spinels in Micrometeorites and Meteorite Fusion Crusts Semenenko V. P. Girich A. L. Sharkin O. P. Highly Porous Fragments in Saratov (L4) Ordinary Chondrite Semenenko V. P. Golovko N. V. Organic Compounds in Black Veins of Barbotan (H5) and Charsonville (H6) Chondrites Semenenko V. P. Kolesov G. M. Ljul A. Yu. Composition and Structure of Black Veins in Barbotan (H5) and Charsonville (H6) Chondrites Semenova A. S. Nazarov M. A. Guseva E. V. Lunar Meteorite MAC 88105: Petrology of Igneous Rock Clasts Shearer C. K. Brearley A. J. Trace Element Zoning and Subsolidus Microstructure of Pigeonite in the Zagami Shergottite Shukolyukov Yu. A. Petaev M. I. Noble Gases in the Omolon Pallasite Skripnik A. Ya. Ignatenko K. I. Kononkova N. N. Ivanov A. V. Glasses, Glassy Inclusions and Chondrules in the Kaidun Meteorite Steele I. M. Olsen E. Crystal Structure of Natural Stanfieldite from the Imilac Pallasite Spitz A. H. Statistical Comparisons of Antarctic and Non-Antarctic Ureilites Ustinova G. K. Lavrukhina A. K. On the Production of 26Al in the Supernova Shell Weber D. Bischoff A. Mineralogy and Chemistry of Refractory Inclusions in CR-like Chondrites from the Sahara Desert Zinovieva N. G. Mitreikina O. B. Granovsky L. B. New Data on the Chondrite "Tuan Tuc (L5-6)" Harper C. L. Jr. Nyquist L. E. Bansal B. Wiesmann H. Shih C.-Y. High Precision Investigations of the 53Mn-53Cr Systematics. II: Acapulco Alexeev V. A. Is there the Clustering of Cosmic-Ray Exposure Ages of H Chondrites at 30 Myr? Alexeev V. A. Are there any Clusterings of the Cosmic-Ray Exposure Ages of L Chondrites? Alexeev V. A. Exposure Ages of L and LL Chondrites Ariskin A. A. Borisov A. A. Barmina G. S. Simulating Iron-Melt Equilibrium for Silicate Systems Bland P. Pillinger C. T. Hutchison R. A New Ureilite from the Sahara - Acfer 277 Bogard D. D. Garrison D. H. 39Ar-40Ar Ages of Howardite Clasts: Additional Evidence for Early HED Parent Body Bombardment Britt D. T. Pedroni A. The Bidirectional Reflectance Spectrum of the ACFER111 Regolith Breccia Britt D. T. Pieters C. M. Bidirectional Reflectance Spectra of Five Antarctic Light-Dark Ordinary Chondrites Connolly H. C. Jr. Hewins R. H. The Production of Accretionary Rims Around Chondrules by Drop Quenching into Dust: A Test for Parent Body Origin Connolly H. C. Jr. Hewins R. H. The Experimental Production of Accretionary Rims Around Isolated Olivine Grains Fisenko A. V. Kashkarov L. L. Semjonova L. F. On the Origin of the Diamonds from the Efremovka Chondrite by the Thermoluminescence Data Geiger T. Bischoff A. Spettel B. Bevan A. W. R. Cook 003: A New CK Chondrite from the Nullarbor Region, South Australia Genaeva L. I. Kashkarov L. L. Radiation Characteristics of the Olivine Grains from Soko-Banja LL4 Chondrite Goswami J. N. Srinivasan G. Ulyanov A. A. Isotopic Disequilibrium in Coexisting Mineral Phases in an Efremovka CGI: An Ion Probe Study Ivanov A. V. Kononkova N. N. Guseva E. V. The Kaidun Meteorite: Aqueous Alteration of Metal Iron and Schreibersite Ivanova M. A. Krot A. N. Mitreikina O. B. Zinovieva N. G. Chromite-rich Inclusions in the Homestead (L5) Chondrite Ivanova M. A. Mitreikina O. B. Krot A. N. Zinovieva N. G. Na-Al-Cr-Bearing Chondrules from the Berdyansk (L6) Chondrite Jehanno C. Froget L. Robin E. Rocchia R. Glasses at the K/T Boundary of Beloc (Haiti) are not Tektites Karpenko S. F. Fisenko A. V. Ljalykov A. V. Semenova L. F. Shukolyukov Yu. A. New Data on 146Nd Excess in HNO3- and HCLO4- Soluble Fractions of Efremovka CV3 Chondrite Kashkarov L. L. Fisenko A. V. Modelling of the Chondrule Formation Process by Laser Radiation Kashkarov L. L. Kalinina G. V. Radiation Parameters of the Elenovka L5 Chondrite by the Track Data for the Olivine Crystals of Different Size Kashkarov L. L. Korotkova N. N. Skripnik A. Ya. Complex Radiation-Thermal History of the Kaidun Chondrite Kerridge J. F. Isotopic Systematics of Lunar Surface Nitrogen: A Reappraisal Krot A. N Ivanova M. A. Petaev M. I. 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