Monday, March 17, 1997 MARS FLOWS AND PROCESSES 8:30 a.m. Room A Chair(s): G. Komatsu S. E. H. Sakimoto Komatsu G.* Baker V. R. Cataclysmic Flooding in the Solar System: a New Perspective Ori G. G.* Mosangini C. Fluidization and Water Production in Chaos on Mars Crown D. A.* Mest S. C. Dao, Harmakhis, and Reull Valles: the Role of Outflow Channels in the Degradation of the Circum-Hellas Highlands of Mars Tsoar H. Wilson G. R.* Coquilla R. V. White B. R. Greeley R. Wind-Flow over Seif Dune Models: Implications for Mars Michaels G. A.* Greeley R. Debris Flows or Lava Flows on Mars? Shapes of Terrestrial Counterparts May Help Identify Flows Imaged in Upcoming Missions Sakimoto S. E. H.* Baloga S. Crisp J. Viscosity and Flow Rate Constraints for Tube-fed Planetary Lava Flows Rogers P. G.* Zuber M. T. Topographic Effects on Flowing Lava: Analysis of Small and Intermediate Scale Perturbations Glaze L. S.* Baloga S. M. Stockman S. A. Crisp J. A. Simulations of Puu Oo Lava Flows on Mars Gregg T. K. P.* Schultz P. H. Shallow Martian "Sills": Intrusions or Extrusions? Monday, March 17, 1997 ALH 84001: CARBONATES AND LIFE(?) 8:30 a.m. Room B Chair(s): D. W. Mittlefehldt T. D. Swindle McKay G. A.* Lofgren G. E. Carbonates in ALH84001: Evidence for Kinetically Controlled Growth Treiman A. H.* Chemical Disequilibrium in Carbonate Minerals of Martian Meteorite ALH 84001: Inconsistent with High Formation Temperature. Scott E. R. D.* Yamaguchi A. Krot A. N. Shock Melting of Carbonate, Plagioclase, and Silica in the Martian Meteorite ALH84001 Kirschvink J. L. Maine A.* Vali H. Paleomagnetic Evidence Supports a Low-temperature Origin of the Carbonate in Martian Meteorite ALH 84001 Greenwood J. P.* Riciputi L. R. McSween Jr. H. Y. Sulfur Isotopic Variations in Sulfides from Shergottites and ALH 84001 Determined by Ion Microprobe: No Evidence for Life on Mars Valley J. W.* Eiler J. M. Graham C. M. Gibson Jr. E. K. Romanek C. S. Ion Microprobe Analysis of Oxygen and Carbon Isotope Ratios in the ALH 84001 Meteorite Gilmour J. D. Lyon I. C. Saxton J. M. Turner G.* Whitby J. A. Oxygen and Noble Gas Isotope Constraints on the Origin of ALH84001 Carbonate Gibson Jr. E. K.* McKay D. S. Thomas-Keprta K. Romanek C. S. Clemett S. J. Zare R. N. Vali H. Possible Relic Biogenic Activity in Martian Meteorite ALH84001: A Current Assessment Westall F.* de Wit M. J. Dann J. What Do Fossil Bacteria Look Like? Examples of 3.5 Billion-year Old Mineral Bacteria and the Search for Evidence of Life in Extraterrestrial Rocks Thomas-Keprta K. L. Wentworth S. J.* McKay D. S. Stevens T. O. Golden D. C. Allen C. C. Gibson Jr. E. K. The Search for Terrestrial Nanobacteria as Possible Analogs for Purported Martian Nanofossils in the Martian Meteorite ALH84001 Steele A.* Goddard D. T. Stapleton D. Smith J. Tapper R. Grady M. McKay D. S. Gibson Jr. E. K. Thomas-Keprta K. L. Beech I. B. Atomic Force Microscopy Imaging of ALH84001 Fragments Wright I. P.* Grady M. M. Pillinger C. T. An Investigation into the Association of Organic Compounds with Carbonates in ALH 84001 Flynn G. J.* Keller L. P. Kirz J. Wirick S. Bajt S. Chapman H. N. Carbon Mapping and Carbon-XANES Measurements on Carbonate Globules from ALH 84001 Monday, March 17, 1997 ORIGINS OF PLANETARY SYSTEMS: OBSERVATIONS AND THEORY 8:30 a.m. Room C Chair(s): A. P. Boss P. Cassen Black D. C.* Search for Other Planetary Systems: Where Do We Stand? Peale S. J.* The Importance of Jupiters in a Microlensing Search for Planets Vanhala H.* Cameron A. G. W. Numerical Simulations of Triggered Star Formation Boss A. P.* Formation of Giant Gaseous Protoplanets by Gravitational Instability Stepinski T. F. Modeling the Evolutionary History of the Solar Nebula Matthews L. S.* Hyde T. W. Coagulation in Dusty Plasmas Cassen P.* Woolum D. S. Nebular Fractionations and Mn-Cr Systematics Wood J. A.* The Nebular Environment of Chondrite Formation Wetherill G. W.* Chambers J. E. Numerical Integration Study of Primordial Clearing of the Asteroid Belt Ghosh A.* McSween Jr. H. Y. The Accretionary Cooling Model - a Verification Cameron A. G. W.* Extended Parameter Study of the Giant Impact Monday, March 17, 1997 ACHONDRITES 2:30 p.m. Room A Chair(s): M. M. Grady A. Ruzicka Righter K.* Drake M. J. Formation of Eucrites and Diogenites on a Vesta-sized Asteroid: II. Equilibrium Crystallization of a Chondritic Magma Ocean Ruzicka A.* Snyder G. A. Taylor L. A. Formation of Eucrites and Diogenites in a Magma Ocean on the HED Parent Body Yamaguchi A.* Taylor G. J. Keil K. Not All Eucrites are Monomict Breccias Grady M. M.* Wright I. P. Pillinger C. T. Indigenous Primitive Carbon in Eucrites and Diogenites Chikami J.* Takeda H. Yugami K. Mikouchi T. Miyamoto M. Zn Abundance in Coexisting Troilite and Spinel in Achondrites: Remnant Indicative of the Primitive Source Materials Arai T.* Takeda H. Miyamoto M Metamorphic History of a Large Opaque Nodule in Crystalline Eucrite Asuka 881388 Boesenberg J. S.* Delaney J. S. Prinz M. Magnesian Megacrysts and Matrix in the Mesosiderite Lamont Wadhwa M.* Shukolyukov A. Lugmair G. W. The Relationship Between Basaltic Clasts in Mesosiderites and the HED Meteorites: Clues from Mn-Cr Systematics of Two Vaca Muerta Clasts. Fogel R. A.* A New Aubrite Basalt Vitrophyre from the LEW87007 Aubrite. Takeda H.* Yugami K. Bogard D. Miyamoto M. Plagioclase-Augite-Rich Gabbro in the Caddo County IAB Iron, and the Missing Basalts Associated with Iron Meteorites Benedix G. K.* McCoy T. J. Keil K. Winonaites Revisited: New Insights into Their Formation Goodrich C. A.* Preservation of a Nebular Mg-delta 17O Correlation During Partial Melting of Ureilites Monday, March 17, 1997 MARS TECTONICS AND GEOPHYSICS 2:30 p.m. Room B Chair(s): B. G. Bills R. A. Schultz Dohm J. M.* Tanaka K. L. Hare T. M. Channel Development of the Thaumasia Region of Mars Based on Detailed Mapping and GIS Analysis Golombek M. P.* Franklin B. J. Tanaka K. L. Dohm J. M. Extension Through Time Across Thaumasia, Mars Anderson R. C.* Golombek M. P. Franklin B. J. Tanaka K. L. Dohm J. M. Lias J. Higdon J. A New Detailed Structural History of the Tharsis Region of Mars Schultz R. A.* Dual-Process Genesis for Valles Marineris Basins and Troughs on Mars Anderson F. S.* Grimm R. E. Rift Processes at Valles Marineris, Mars: Rate Dependent Strength Evolution Versus Necking. Tanaka K. L.* Origin of Valles Marineris and Noctis Labyrinthus, Mars, by Structurally Controlled Collapse and Erosion of Crustal Materials McGovern P. J.* Solomon S. C. Some Implications of a Basal Detachment Structural Model for Olympus Mons Zeitler W.* Oberst J. Ohlhof T. The Global Shape of Mars: Preliminary Results from a Reanalysis of the Viking Mars Control Point Network Bills B. G.* Lemoine F. A. Rowlands D. D. Pavlis D. Observational Constraints on the Rotational Dynamics of Mars Bertka C. M. Fei Y. The Moment of Inertia Factor of Mars: Implications for Geochemical Models of the Martian Interior Monday, March 17, 1997 GALILEO PLENARY SESSION 1:30 p.m. Room C Johnson T. V.* Galileo: Year One at Jupiter Monday, March 17, 1997 GALILEO MISSION RESULTS: OVERVIEW AND IO 2:30 p.m. Room C Chair(s): G. Neukum D. A. Senske McEwen A. S.* Keszthelyi L. Simonelli D. Johnson T. Carr M. Greeley R. Galileo SSI Team 17 Years of Surface Changes on Io: Galileo SSI Results Greeley R.* Sullivan R. Bender K. C. Belton M. J. S. Carr M. Chapman C. Clark B. E. Fagents S. A. Geissler P. E. Head J. W. Homan K. S. Johnson T. Klaasen K. Klemaszewski J. McEwen A. S. Moore J. M. Neukum G. Pappalardo R. T. Phillips C. B. Pilcher C. Senske D. Thomas P. C. Galileo SSI Team Geology of Europa: Initial Galileo Imaging Results Head J. W.* Pappalardo R. T. Belton M. J. S. Carr M. Chapman C. Greeley R. Greenberg R. McEwen A. Neukum G. Pilcher C. Veverka J. Johnson T. Klaasen K. Senske D. Breneman H. Galileo SSI Team Ganymede: Major Geologic Questions and First Results from the Galileo G1 and G2 Encounters Bender K. C.* Homan K. S. Greeley R. Chapman C. R. Moore J. Pilcher C. Merline W. J. Head J. W. Belton M. Johnson T. V. SSI Team The Asgard and Valhalla Regions; Galileo's New Views of Callisto Thomas P. C.* Veverka J. Simonelli D. Burns J. Klaasen K. Davies M. E. Chapman C. Belton M. Galileo SSI Team Small Satellites of Jupiter: Galileo Results Chapman C. R.* Merline W. J. Bierhaus B. Keller J. Brooks S. McEwen A. Tufts B. R. Moore J. Carr M. Greeley R. Bender K. C. Sullivan R. Head J. Pappalardo R. Belton M. J. S. Neukum G. Wagner R. Pilcher C. Galileo Imaging Team Populations of Small Craters on Europa, Ganymede, and Callisto: Initial Galileo Imaging Results McCord T. B.* Hansen G. B. Clark R. M. Granahan J. Hibbitts C. A. Fanale F. Carlson R. W. Smythe W. Segura M. Galileo NIMS Team NIMS Reflectance Spectra for the Icy Galilean Satellites Russell C. T.* Kivelson M. G. Khurana K. K. Magnetic Fields of the Galilean Satellites Simonelli D. P.* Veverka J. McEwen A. S. Galileo Imaging Team Io: Evidence for Major Variations in Regolith Properties from Galileo Images Lopes-Gautier R.* Davies A. G. Carlson R. Smythe W. Soderblom L. Monitoring of Io's Volcanic Activity Using Galileo's near Infrared Mapping Spectrometer (NIMS) Davies A. G.* Lopes-Gautier R. Carlson R. Smythe W. Soderblom L. Galileo NIMS Team Io's Thermal Output as Measured by Galileo's Near Infrared Mapping Spectrometer During Galileo's First Orbit Schuster P.* Oberst J. Zeitler W. Neukum G. Davies M. Colvin T. Thomas P. McEwen A. Keszthelyi L. Carr M. Schubert G. Galileo Imaging Team Global Shape and Regional Topography of Io: First Galileo Results Monday, March 17, 1997 DUST TO SPHERULES - CAPTIVE AND AT LARGE 2:30 p.m. Room D Chair(s): D. E. Brownlee J. A. Nuth Hallenbeck S. L. Daukantas P. Nuth J. A.* Mid-Infrared Spectral Evolution of Amorphous Magnesium and Iron Silicate Smokes Due to Vacuum Annealing at T >= 1000K Liou J.-C.* Zook H. A. Grun E. Baguhl M. Linkert G. Kivelson M. Riemann R. Masses and Velocity of Jovian Dust Streams Detected by Galileo Nazzario R. C.* Hyde T. W. Dust Grain Orbital Behavior Around Mars Anderson W. W.* Properties of Shocked Aerogel Graham G. A.* Kearsley A. T. Grady M. M. Wright I. P. An Fe-Ni Melt Residue Deposited in Space: a New Class of Micrometeoroid? Keller L. P.* Messenger S. Miller M. Thomas K. L. Nitrogen Speciation in a 15N-Enriched Interplanetary Dust Particle Flynn G. J.* Sutton S. R. The Chemical Composition of Cluster IDPs Using the XRF-Microscope Brownlee D. E.* Joswiak D. Bradley J. P. Vesicular Carbon in Strongly Heated IDPs Rietmeijer F. J. M.* Principal Components: Petrology and Chemistry of Polyphase Units in Chondritic Porous Interplanetary Dust Particles Genge M. J.* Grady M. M. Hutchison R. Free-Silica in a Non-Chondritic Micrometeorite from Antarctic Ice Engrand C.* Kurat G. Awoke H. M. Koeberl C. Hammer C. Maurette M. Geochemistry of Large Cosmic Spherules and Micrometeorites from Northern Greenland. Xue S. Shih C.-Y. Wiesmann H. Brownlee D. E. Hall G. S. Herzog G. F.* Nyquist L. E. Isotopic and Elemental Composition of Chromium, Iron, and Nickel in Type I Deep-Sea Sphere Sharma M.* Papanastassiou D. A. Wasserburg G. J. Os Isotopic Composition and Concentration in the Oceans: Terrestrial and Extraterrestrial Sources Tuesday, March 18, 1997 ORDINARY AND ENSTATITE CHONDRITES 8:30 a.m. Room A Chair(s): R. D. Ash H. C. Connolly Jr. Choi B.-G.* McKeegan K. D. Krot A. N. Wasson J. T. Magnetite in Unequilibrated Ordinary Chondrites: Evidence for an 17O-rich Reservoir in the Solar Nebula Connolly Jr. H. C.* Peters M. T. Huss G. R. Burnett D. S. Wasserburg G. J. Lithophile Trace Element Distributions in Individual Phases from Equilibrated Ordinary Chondrites Jones R. H.* Equilibration of Pyroxenes in Type 4-6 LL Chondrites. Feldstein S. N.* Jones R. H. Papike J. J. Experimental Partial Melting of the L6 Ordinary Chondrite, Leedey. Sharp T. G.* Lingemann C. M. Dupas C. Stoffler D. Natural Occurrence of MgSiO3-Ilmenite and Amorphized (Mg,Fe)SiO3-Perovskite in a Shocked L5-6 Chondrite El Goresy A.* Wopenka B. Chen M. Weinbruch S. Sharp T. G. Evidence for Two Different Shock Induced High-pressure Events and Alkali-vapor Metasomatism in Peace River and Tenham (L6) Chondrites. Scherer P.* Schultz L. Noble Gases, Cosmic Ray Exposure Ages and Pairing of H3-chondrites from the Sahara. Benoit P. H.* Sears D. W. G. Meteorite Infall and Transport in Antarctica: an Analysis of Icefields as Accumulation Surfaces Pesonen L. J.* Kuoppamaki K. Timonen J. Hartikainen J. Terho M. Hartikainen K. On the Porosity of L and H Chondrites Ash R. D.* Gilmour J. D. Whitby J. Prinz M. Turner G. I-Xe Dating of Chondrules from the Qingzhen Unequilibrated Enstatite Chondrite McCoy T. J.* Dickinson T. L. Lofgren G. E. Partial Melting of Indarch (EH4) from 1000-1425 degrees C: New Insights into Igneous Processes in Enstatite Meteorites Rubin A. E.* Formation of Sinoite in EL Chondrites by Impact Melting Weisberg M. K.* Prinz M. Nehru C. E. QUE 94204: an EH-Chondritic Melt Rock. Tuesday, March 18, 1997 MARS REMOTE SENSING 8:30 a.m. Room B Chair(s): J. F. Bell III W. M. Calvin Garvin J. B.* Particle Size Distribution Analysis of Mars Lander Sites Craddock R. A.* Eaton L. S. Russo C. J. Torley R. F. A New Method for Determining the Emplacement Mechanism(s) of Rocks on Mars Feely K. C.* Christensen P. R. Modal Abundances of Rocks Using Infrared Emission Spectroscopy Cimino G. Calvin W. M.* The Mariner 7 Infrared Spectra: Calibration and a Preview for TES Scheinost A. C.* Schwertmann U. VIS-NIR Reflectance Spectra of Goethite (alpha-FeOOH) as a Function of Particle Size, Unit-Cell Size, and Cation Substitutions Bishop J. L.* Pieters C. M. Hiroi T. Spectroscopic Properties of Martian Meteorite ALH84001 and Identification of Minerals and Organic Species Bell III J. F.* Thomas P. C. Wolff M. J. Lee S. W. James P. B. Mineralogy of the Martian North Polar Sand Sea from 1995 Hubble Space Telescope Near-IR Observations Cooper C. D.* Mustard J. F. Loss of Spectral Contrast in Hyperfine Palagonite: Implications for Smectite on Mars Guinness E. A.* Arvidson R. E. Shepard M. K. Clark I. Optical Scattering Properties of Terrestrial Varnished Basalts Compared with Rocks and Soils at the Viking Lander Sites Morris R. V.* Low-temperature Reflectivity Spectra of Ferric Mineralogies: Implications for Identification of Mineral Phases on Mars Yen A. S.* Murray B. C. Grunthaner F. J. Rossman G. R. Ultraviolet Radiation-Induced Dehydration of Minerals: New Experiments Ivanov A. B.* Muhleman D. O. Vasavada A. R. Microwave Thermal Emission Mapping of the Stealth Region on Mars. Baron J. E.* Simpson R. A. Tyler G. L. Radiowave Scattering from Surface Rocks: Application to Mars Viking and Pathfinder Landing Sites Tuesday, March 18, 1997 GALILEO MISSION RESULTS: EUROPA AND GANYMEDE 8:30 a.m. Room C Chair(s): R. T. Pappalardo R. J. Sullivan Greenberg R.* Geissler P. Pappalardo R. Galileo Imaging Team Long-Term and 'Diurnal' Tidal Stresses on Europa Carr M.* Chuang F. Belton M. Bender K. Chapman C. Greeley R. McEwen A. Sullivan R. Galileo Imaging Team A Large Multi-ringed Structure on Europa: a Possible Remnant of an Impact Basin Buried Beneath the Ice Crust. Sullivan R.* Belton M. Bender K. Carr M. Chapman C. Greeley R. Head J. Homan K. Moore J. Pappalardo R. Tufts B. R. Galileo SSI Team Galileo Views of Crustal Disruption on Europa Klemaszewski J. E.* Greeley R. SSI Team Topography of Europan Brown and Gray Mottled Terrains from Galileo Images at Low Sun Illumination Clark B. E.* Helfenstein P. Veverka J. Geissler P. E. Bell M. E. Greeley R. Sullivan R. Denk T. Multispectral Behaviour and Mixing Model Simulations of Europan Terrains from Galileo Images Geissler P. E.* Bell M. Belton M. J. S. Burns J. Clark B. Denk T. Greeley R. Greenberg R. Helfenstein P. McEwen A. Pappalardo R. Sullivan R. Tufts R. Veverka J. Galileo Imaging Team Galileo Multispectral Imaging of Europa: Evidence for Non-synchronous Rotation Granahan J. C.* Fanale F. P. McCord T. B. Hansen G. Geissler P. Greeley R. Sullivan R. Carlson R. W. Kamp L. W. Leader F. Matson D. Ocampo A. Smythe W. Becker K. Becker T. Cook D. Clark B. E. Helfenstein P. Veverka J. Belton M. J. S. Galileo NIMS Team Galileo SSI Team A Multi-Instrument Spectral View of Europa from Galileo Matson D. L.* Ocampo A. C. Smythe W. D. Carlson R. W. NIMS Team Spectral Variations over Europa's Surface Determined from Galileo near Infrared Mapping Spectrometer (NIMS) Measurements Pappalardo R. T.* Head J. W. Collins G. C. Greeley R. Galileo SSI Team The Origin of Grooved Terrain on Ganymede: Insights from Galileo High-Resolution Imaging Collins G. C.* Head J. W. Pappalardo R. T. Galileo Imaging Team Formation of Ganymede Grooved Terrain by Sequential Extensional Episodes: Implications of Galileo Observations for Regional Tectonics Giese B. Oberst J.* Schreiner B. Roatsch T. Cook A. C. Neukum G. Head J. Pappalardo R. Galileo Imaging Team Local Topography and Areal Distribution of Bright and Dark Material on Ganymede Prockter L.* Head J. W. Senske D. Neukum G. Wagner R. Wolf U. Greeley R. Galileo Imaging Team Galileo Observations of Dark Terrain on Ganymede: Geological Mapping of the Galileo Regio Target Site. Helfenstein P.* Veverka J. Denk T. Neukum G. Head J. W. Pappalardo R. Galileo Imaging Team Dark-Floor Craters: Galileo Constraints on a Ganymede Regolith Component Denk T.* Neukum G. Helfenstein P. Belton M. J. S. Bender K. C. Geissler P. Greeley R. Head J. W. Jaumann R. Pappalardo R. T. Galileo SSI Team Disk-resolved Spectral Characteristics of Ganymede and Callisto Tuesday, March 18, 1997 LUNAR BASINS TO REGOLITH: PROCESSES AND EFFECTS 8:30 a.m. Room D Chair(s): P. H. Schultz J. M. Sisterson Williams K. K.* Greeley R. The Effect of Lunar Crustal Thickness on the Morphologic Transition from Central Peak to Peak-ring Craters Arkani-Hamed J.* Lunar Mascons Revisited Spudis P. D.* Bussey D. B. J. Hawke B. R. Lucey P. G. Blewett D. Crisium Basin Geology from Clementine Data Bussey D. B. J.* Spudis P. D. Hawke B. R. Lucey P. G. Peterson C. A. Taylor G. J. Humorum Basin Geology from Clementine Data Schultz P. H.* Forming the South-Pole Aitken Basin: the Extreme Games Smith D. E.* Zuber M. T. Topography of the Lunar South Polar Region: Implications for the Location and Distribution of Permanently Shaded Areas Morrison D. A.* Bussey D. B. J. The Apollo and Korolev Basins and the Stratigraphy of the Lunar Crust Warren P. H.* Arai T. Mare Components in Mare-highland Lunar Meteorite Regolith Breccias: Implications Vis-à-vis Source-crater Pairing Hiroi T.* Pieters C. M. Morris R. V. New Considerations for Estimating Lunar Soil Maturity from Vis-NIR Reflectance Spectroscopy Basu A.* Yokoyama C. E. Agglutinates and Nanophase Superparamagnetic Iron in Surface Soils on the Moon Sisterson J. M.* Nishiizumi K. Caffee M. W. Imamura M. Reedy R. C. Revised 36Cl Production Rates in Lunar Rock 64455 Using New Cross Section Measurements Nishiizumi K.* Caffee M. W. Arnold J. R. 10Be from the Active Sun Margot J. L.* Campbell D. B. Campbell B. A. Butler B. J. Lunar Dielectric Constants from Aperture Synthesis Polarimetry at 6 cm Tuesday, March 18, 1997 PRESOLAR GRAINS 1:30 p.m. Room A Chair(s): S. A. Sanford T. Stephan Foster P. N. Boss A. P.* Injection of Radioactive Nuclides from the Stellar Source That Triggered the Collapse of the Presolar Cloud Core Hoppe P.* Annen P. Strebel R. Eberhardt P. Amari S. Lewis R. S. Circumstellar SiC Grains of Type Z: Evidence for Extensive He Shell Dredge-up in Low-metallicity Low-mass AGB Stars Nicolussi G. K.* Davis A. M. Pellin M. J. Lewis R. S. Clayton R. N. Amari S. s-Process Zirconium in Individual Presolar Silicon Carbide Grains Amari S.* Nittler L. R. Zinner E. Lewis R. S. Continued Search for Rare Types of Presolar SiC: Grains X and Y Stephan T.* Rost D. Jessberger E. K. Budell R. Greshake A. Zinner E. K. Amari S. Hoppe P. Lewis R. S. TOF-SIMS Analysis of SiC Grains with High Lateral Resolution Kehm K.* Gao X. Hohenberg C. M. Meshik A. P. Swan P. D. Walker R. M. Ne and Xe in SiC from the Acfer 094 Meteorite Gao X.* Nittler L. R. 30Si-Enriched Presolar SiC in Acfer 094 Nicolussi G. K. Davis A. M.* Pellin M. J. Lewis R. S. Clayton R. N. Amari S. The Isotopic Composition of Molybdenum in Single Presolar Silicon Carbide Grains Richter S.* Ott U. Begemann F. Tellurium-H in Interstellar Diamonds Mostefaoui S.* Zinner E. Hoppe P. El Goresy A. In Situ Survey of Graphite in Unequilibrated Chondrites: Morphologies, C, N, and H Isotopes Mendybaev R. A.* Beckett J. R. Grossman L. Stolper E. Volatilization of Graphite in Reducing Gases: Preliminary Results Sandford S. A.* Bernstein M. P. Swindle T. D. The Trapping of Noble Gases by the Irradiation and Warming of Interstellar Ices Tuesday, March 18, 1997 LIFELESS (?) MARTIAN METEORITE 1:30 p.m. Room B Chair(s): T. J. McCoy M. Wadhwa Kaneda K.* McKay G. Le L. Synthetic and Natural Nakhla Pyroxenes: Minor Elements Composition Mikouchi T.* Miyamoto M. McKay G. Similarities in Zoning of Pyroxenes from QUE94201 and EETA79001 Martian Meteorites Mittlefehldt D. W.* Lindstrom D. J. Lindstrom M. M. Martinez R. R. Lithology A in EETA79001 - Product of Impact Melting on Mars Minitti M. E.* Rutherford M. J. Giletti B. J. Schultz P. H. The Effects of Impact on D/H of Hornblendes: Applications to SNC Petrogenesis Righter K.* Hervig R. L. Kring D. A. Ion Microprobe Analyses of SNC Meteorite Melt Inclusions Borg L. E.* Nyquist L. E. Taylor L. A. Wiesmann H. Shih C. -Y. Rb-Sr and Sm-Nd Isotopic Analyses of QUE 94201: Constraints on Martian Differentiation Processes Jagoutz E.* Isotopic Constrains on Differentiation and Evolution of SNC Meteorites Lee D-C.* Halliday A. N. Hf-W Evidence for Early Differentiation of Mars and the Eucrite Parent Body Mathew K. J.* Kim J. S. Marti K. Xenon Components in Martian Meteorites: Evidence for Atmospheric Evolution? Swindle T. D.* Grier J. A. Li B. Olson E. Lindstrom D. J. Treiman A. H. K-Ar Ages of Lafayette Weathering Products: Evidence for Near-surface Liquid Water on Mars in the Last Few Hundred Million Years Jull A. J. T.* Eastoe C. J. Cloudt S. Terrestrial Age of the Lafayette Meteorite and Stable-isotopic Composition of Weathering Products Franchi I. A.* Sexton A. S. Wright I. P. Pillinger C. T. A Refinement of the Oxygen Isotopic Composition of Mars Wang M.-S. Mokos J. Lipschutz M. E.* Volatile and Other Trace Elements in Martian Meteorites Tuesday, March 18, 1997 OUTER PLANETARY SATELLITES 1:30 p.m. Room C Chair(s): J. I. Lunine P. Schenk Asphaug E.* Moore J. M. Morrison D. Bender K. Sullivan R. S. Greeley R. Geissler P. Chapman C. R. Galileo SSI Team Impact Evolution of Icy Regoliths Moore J. M.* Asphaug E. Morrison D. Bender K. C. Sullivan R. J. Greeley R. Geissler P. E. Chapman C. R. Pilcher C. B. Galileo SSI Team Landform Degradation and Mass Wasting on the Icy Galilean Satellites Schenk P.* Bulmer M. Slope Failures at Euboea Montes, Io Kargel J. S.* Soderblom L. A. The Stability of Liquid and Solid Basalt, Sulfur, and Sulfur Dioxide in Io's Subsurface Keszthelyi L. P.* McEwen A. S. Volcanic Differentiation of Io Domingue D. L.* Lane A. L. SO2 Detected on Callisto Noll K. S.* Johnson R. E. McGrath M. A. Caldwell J. J. Detection of SO2 on Callisto with the Hubble Space Telescope McKinnon W. B.* Mystery of Callisto Hogenboom D. L.* Kargel J. S. Reiter M. L. Khor Y. N. Volume Changes Attending Hydration of Quenched Magnesium Sulfate Brine: the Tectonics of Ganymede's Sulci Wilson L.* Head J. W. Factors Influencing the Eruption of Water-Based Magmas Through Europa's Ice Crust. Lunine J. I.* Lorenz R. D. Light and Heat in Cracks on Europa: Implications for Prebiotic Synthesis Ivanov B. A.* Neukum G. Basilevsky A. T. Kruchkov V. P. Titan and Venus: Comparing Atmospheric Entry of Large Meteoroids Lorenz R. D.* McKay C. P. Lunine J. I. Titan's Climate Through Time: Effects of Geothermal and Tidal Heating Tuesday, March 18, 1997 FUTURE MISSIONS? INNOVATION AND AMBITION 1:30 p.m. Room D Chair(s): A. F. Cheng L. L. Hood Cheng A. F.* Farmer J. D. Planetary Surface Sample Collection: Rock Chipper Ulamec S.* Feuerbacher B. Wittmann K. Rosenbauer H. Bibring J. P. Moura D. Mugnuolo R. Haerendel G. Rosetta Lander - in Situ Investigation of a Comets Nucleus Hohenberg C.* Thonnard N. Kehm K. Meshik A. Berryhill A. Glenn A. Active Capture of Low-energy Volatiles: Bringing Back Gases from a Cometary Encounter Chyba C. F.* Ostro S. J. Edwards B. C. Feasibility of Radar Detection of a Europan Ocean from an Orbiting Spacecraft Chapman M. G.* Mars Surveyor in Mangala Valles: 1. Site Justification and Mission Scenario Sunshine J. M.* Continuing Towards More Sophisticated Compositional Interpretations of Silicate-Rich Lithologies on the Surfaces of Asteroids Pieters C.* Murchie S. Cheng A. Zolensky M. Schultz P. Clark B. Thomas P. Calvin W. McSween Jr. H. Y. Yeomans D. McKay D. Clemett S. Gold R. Aladdin: Phobos-Deimos Sample Return Economou T.* Turkevich A. Rieder R. Wanke H. Report on the Status of the APXS on Mars Pathfinder Mission Arvidson R. E.* Bowman J. Blaney D. Farmer J. Hayati S. Klingelhoefer G. Niebur C. S. Plescia J. Saunders R. S. Rocky 7 Prototype Mars Rover: Field Experiments in the Mojave Desert, California Zanetti L. J.* Anderson B. J. Paranicas C. P. Acuna M. H. Intrinsic Magnetic Field Determination for 433 Eros from NEAR Data, Application to a Mercury Orbiter? Duke M. B.* Whittaker W. L. Regolith/ice Stratigraphy in a Lunar Polar Coldtrap: Basis for a Lunar Ice Discovery Mission Otake H.* Haruyama J. Matsunaga T. Optical Observation of the Lunar Surface from the Orbiter of SELENE Hood L. L.* Hartdegen K. Lunar Core Detection Using Data from a Single Orbiting Magnetometer: A Feasibility Study Tuesday, March 18, 1997 EDUCATION AND OUTREACH:ACTIVITIES AND RESOURCES POSTERS 6:30 p.m. LPI Dasch E. J. Ward E. B. The NASA Experimental Program to Stimulate Competitive Research (EPSCoR) Gitlin A. R. Bender K. C. Greeley R. Edible Curriculum: Modeling Lava Viscosity Using Pudding Moore H. J.* Tillman J. E. LeCompte G. F. Viking Landers and the Surface of Mars: K-12 Exercises Schenk P. Gwynn D. Tutor J. Stereo Atlas of the Solar System on CD: a New Tool for Educators Suppe F. Norton S. D. Friedman D. Kudaravalli S. Stone C. P. Integrating Venus Planetary Science into Liberal Arts Curricula Borrello M. C. Strait M. M. Davis J. E. Gibson J. H. Reed B. C. Outreach Activities in Space Science at Alma College Betts B. H. SJI Sky and Space Update as an Education Resource, and Videoconferencing in Planetary Science Education Lebofsky L. A. Lebofsky N. R. A Sky Full of Stars: Astronomy in Myth and Legend Edgett K. S. Christensen P. R. Dieck P. A. Kingsbury A. R. Kuhlman S. D. Roberts J. L. Wakefield D. A. Rice, Jr. J. W. Dodds J. K-12 and Public Outreach for NASA Flight Projects: Five Years (1992-1997) of the Arizona Mars K-12 Education Program Wood C. A. Borysevicz H. W. Dronen J. M. Eggebraaten T. J. Gabrynowicz J. I. Graham J. F. Williams S. H. Jensen W. C. WWW.SPACE.EDU -- Space Education over the Internet Taylor G. J. Martel L. M. V. Planetary Science Research Discoveries: an On-line Magazine of Ideas and Insights at Http://www.soest.hawaii.edu/PSRdiscoveries. Lindstrom M. M . Sumners C. Allen C. C. Allen J. S. Wyatt R. Destination Mars: A Planetarium Program and Exhibit Prepared in Collaboration by Houston Museum of Natural Science and Johnson Space Center Smailbegovic A. Coombs C. BinZafar N. Contact Light - an Interactive CD-ROM for Middle School Students Urquhart M. L. Reaching for the Red Planet Berczi Sz. Foldi T. Kubovics I. Lukacs B. Varga I. Comparison of Planetary Evolution Processes Studying Cosmic Thin Section Sets of NASA and NIPR Grady M. M. Bridges J. C. Messengers from Space: Notes from the Natural History Museum for Teachers Lindstrom M. M. Rocks from Space: Lunar Samples and Meteorites for the Classroom Tuesday, March 18, 1997 GALILEO MISSION RESULTS 6:30 p.m. LPI Russell C. T.* Bagenal F. Cheng A. F. Ip W-H. Roux A. Smyth W. H. Io's Interaction with the Jovian Magnetosphere James M. R. Possible Effects of Electrically Charged Particles in Io's Volcanic Plumes. McEwen A. S.* Spencer J. R. Simonelli D. Johnson T. Belton M. Keszthelyi L. Galileo SSI Team Io Plume Observations with Galileo and HST Leone G. Wilson L. Magma Densities, Magma Reservoirs, and Volcanic Eruption Styles on Io. Matson D. L.* Blaney D. L. Johnson T. V. Veeder G. J. Galileo's View of Io Matson D. Ocampo A. Smythe W. Carlson R. NIMS Team Hendrix A. R. Barth C. A. Hord C. W. Lane A. L. UVS Team Galileo's Europa Polar Region Observations by the Near Infrared Mapping Spectrometer (NIMS) and the Ultraviolet Spectrometer (UVS) Merline W. J. Chapman C. R. Bierhaus B. Keller J. Brooks S. McEwen A. Sullivan R. Greeley R. Bender K. Carr M. Pilcher C. Galileo Imaging Team Europa's Craters and Pits: Preliminary Insights from the First Orbits of Galileo Greeley R.* Sullivan R. Bender K. C. Homan K. S. Fagents S. A. Pappalardo R. T. Head J. W. Galileo SSI Team Europa Triple Bands: Galileo Images Fagents S. A. Greeley R. Galileo SSI team Explosive Venting on Europa? a Preliminary Assessment. Tufts B. R.* Greenberg R. Sullivan R. Pappalardo R. Galileo Imaging Team Reconstruction of Europan Terrain in the Galileo C3 "Wedges" Image and Its Geological Implications Phillips C. B. McEwen A. S. Geissler P. E. Greeley R. Sullivan R. Pappalardo R. Galileo SSI Team New Mosaics of Europa and Mapping of Endogenic Units Geissler P. E. McEwen A. S. Simonelli D. P. Lopes-Gautier R. Davies A. G. Granahan J. Denk T. Galileo Imaging Team Global Color Variations on Io Hoppa G. V.* Greenberg R. Geissler P. Plassmann J. Tufts B. R. Galileo Imaging Team Rotation of Europa: Constraints from Terminator Positions Moore J. M.* Bender K. C. Sullivan R. J. Greeley R. McEwen A. S. Tufts B. R. Head III J. W. Pappalardo R. T. Belton M. J. S. Galileo SSI Team Europan Macula: Possible Origins Thomas C. Is Tyre Macula an Ice Cauldron? Pappalardo R. T.* Head J. W. Greeley R. Sullivan R. J. Carr M. H. Tufts B. R. Galileo SSI Team Ganymede vs. Europa: Comparisons of Sulci at the Regional Scale Pappalardo R. T. Head J. W. Collins G. C. Greeley R. Galileo SSI Team Ganymede Grooved Terrain at the Local Scale: Results from Galileo Senske D. A.* Head J. W. Pappalardo R. Collins G. Greeley R. Magee K. Neukum G. Chapman C. Galileo Imaging Team Stratigraphy of Uruk Sulcus as Revealed by High-Resolution Galileo Images Collins G. C.* Head J. W. Pappalardo R. T. Galileo Imaging Team A Necking Origin for Ganymede Long Wavelength Grooved Terrain Topography: Insights from Galileo Observations at Uruk Sulcus Yingst R. A. Head J. W. Moore J. M. Chapman C. R. Pappalardo R. Galileo Imaging Team Ganymede Bright Terrain at Very High Resolution: Geologic Structure and Regolith Processes. Prockter L. Head J. W. Pappalardo R. Greeley R. Senske D. Moore J. Denk T. Galileo Imaging Team The Distribution and Origin of Dark Material in Galileo Regio, Ganymede: New Evidence from Geological Relationships Seen in the Galileo Data. Jones K. B. Head J. W. Chapman C. R. Greeley R. Moore J. M. Neukum G. Pappalardo R. T. Galileo SSI Team Morphology of Palimpsests on Ganymede from Galileo Observations Weitz C. M. Head III J. W. Pappalardo R. Neukum G. Giese B. Oberst J. Cook A. Schreiner B. Greeley R. Helfenstein P. Chapman C. Galileo SSI Team Galileo Observations of Ganymede Impact Crater Morphology Yamagishi Y. Kurita K. Possibility of a Molten Layer in Ganymede Hendrix A. R. Barth C. A. Lane A. L. Hord C. W. Stewart A. I. F. Simmons K. E. McClintock W. E. Ajello J. M. Naviaux K. L. Aiello J. J. Tobiska W. K. Stephens S. K. Variations in Brightness over Callisto's Surface as Measured by the Galileo Ultraviolet Spectrometer McCord T. B.* Bender K. C. Hansen G. B. Hibbitts C. A. Granahan J. Segura M. Carlson R. W. Smythe W. Greeley R. Geissler P. Belton M. J. S. Galileo NIMS Team Galileo SSI Team A First Analysis of Callisto Using Galileo NIMS and SSI Measurements Segura M. Bender K. Granahan J. McCord T. Greeley R. Carlson R. Belton M. Galileo NIMS Team Galileo SSI Team Galileo NIMS and SSI Collaborative Observations at Callisto Smythe W. D. Mehlman R. Leader F. Kamp L. W. Carlson R. W. Shirley J. Galileo NIMS Team Effects of the Jovian Radiation Environment on the Galileo NIMS Instrument Thomas P. C. Simonelli D. Burns J. Davies M. E. McEwen A. S. Belton M. J. S. Galileo SSI Team Shapes and Topography of Galilean Satellites from Galileo SSI Limb Coordinates Davies M. E. Colvin T. R. Thomas P. Veverka J. Belton M. J. S. Oberst J. Zeitler W. Neukum G. Control Networks of the Galilean Satellites: Solutions for Size and Shape Tuesday, March 18, 1997 MARS POSTERS 6:30 p.m. LPI Grant J. A. Geologic Mapping and Drainage Basin Analysis in Margaritifer Sinus, Mars Treiman A. H. Water in the Martian Crust: Slope-Parallel Layers in the Wall of Melas Chasma are Hesperian-age Soil Horizons Mest S. C. Crown D. A. Geologic Mapping of the Reull Vallis Region, Mars Kuzmin R. O. Greeley R. Landheim R. Cabrol N. Geologic Mapping of Gusev Crater-Ma'adim Vallis Region, Mars Grin E. A. Cabrol N. A. Antarctic Analog for a Perennial Ice-Covered Paleolake in Gusev Crater (Mars) Costard F. Aguirre-Puente J. Makhloufi N. Greeley R. Martian Fluvial-thermal Erosion : Experimental Control of the Model Mangold N. Allemand P. Thomas P. Duval P. Shallow Icy Decollements on Mars: Rheological Evidences-Preliminary Results Tanaka K. L.* Geologic Mapping of Sedimentary Materials in the Northern Plains of Mars Stewart K. H. Crown D. A. Geomorphology of Debris Aprons in the Eastern Hellas Region of Mars Wilson G. R. Greeley R. White B. R. Experiments of Dust Threshold and Flux Under Martian Conditions Edgett K. S. Aeolian Dune Fields Among Volcanic Landforms in a Hyper-arid, Desert Environment: Evidence of Past Explosive Volcanism in the Tharsis Region, Mars. Boyce J. M.* Roddy D. J. Martian Crater Ejecta: Emplacement and Implications for Water in the Subsurface Lias J. H. Dohm J. M. Tanaka K. L. Geologic History of Lowell Impact Albin E. F. Geology of the Cassini Impact Basin, Mars Crumpler L. S. Syrtis Major-Isidis Planitia Transition, Mars: Preliminary Evaluation of a Potential Mars Surveyor Program Landing Site Crumpler L. S. Geotraverse Across the Xanthe Terra - Chryse Planitia Transition Zone, Mars Parker T. J. Smith P. Horizon Viewing of Local Topographic Features from the Mars Pathfinder Landing Site Anderson R. C. Parker T. J. Pancake-like Shields in the Pathfinder Landing Site, Mars Zimbelman J. R. Crown D. A. Grant J. A. Hooper D. M. The Medusae Fossae Formation, Amazonis Planitia, Mars: Evaluation of Proposed Hypotheses of Origin Scott E. D. Wilson L. An Ancient Volcano in Tharsis Province. Wilson L. Head J. W. Factors Controlling the Depths and Sizes of Magma Reservoirs in Martian Volcanoes. Hood L. L. Hartdegen K. A Crustal Magnetization Model for the Magnetic Field of Mars: A Preliminary Study of the Tharsis Region Ridley W. I.* Plumlee G. S. On Martian Alteration as a Function of Climate and Volcanism Berczi Sz. Lukacs B. Water-ammonia Ice Meteorites and/or Ammonia(um)-silicates from the Early Solar System: Possible Sources of Amino-radicals of Life-molecules on Earth and Mars? Stoker C. R. Bullock M. A. Organic Degradation Simulated Martian Conditions Mancinelli R. L. White M. R. Banin A. The Search for N on Mars: Mineralogical Analysis of Ammonium in Clays by DTA/GC Kirkland L. E. Treiman A. H. Murchie S. Photometry of Bright Regions on Mars: ISM Results Israel E. J. Arvidson R. E. Wang A. Pasteris J. D. Jolliff B. L. Laser Raman Spectroscopic Measurements of a Desert-Varnished Basalt and Implications for In-situ Analysis of Martian Rocks Hamilton V. E.* Christensen P. R. Interpreting the Origins and Evolutions of Martian Basalts from Pyroxene Composition: II. Vibrational Spectroscopy of Clinopyroxenes and Terrestrial Basaltic Rocks Griffith L. L.* Shock E. L. Orthopyroxenite Hydrothermal Alteration Pathways: Low vs. High Temperature Newsom H. E.* Trace Element Composition of the Martian Soil: Possible Components Allen C. C.* Morris R. V. Lindstrom D. J. Lindstrom M. M. Lockwood J. P. JSC Mars-1: Martian Regolith Simulant Johnson J. R.* Lucey P. G. Horton K. A. Winter E. M. Comparison of Fine-Particle Coating and Porosity Effects on Infrared Spectroscopy of Soils in the Field and Laboratory Forney P. B. Kirkland L. E. Calibration of the Mariner 6/7 Infrared Spectrometers Bell III J. F. Clancy R. T. James P. B. Lee S. W. Martin L. J. Wolff M. J. Hubble Space Telescope Observations of Mars During 1996-1997 Erard S. Mars' 1995 Opposition from Pic Du Midi Armand N. A. Zharkov V. N. Kozenko A. V. Tishchenko Yu. G. Shmalenyuk A. S. Radiowave Active-passive Approach for Investigation of the Heat Flux from the Martian Subsurface Layers Lee E. M. Edwards K. E. Grecu A. Redding B. Wasserman A. Bennett A. Mars 1:500k High-Resolution Map Bases Arsenault J. M. Analysis of Acheron Fossae Terrain Using Geographical Information Systems Dohm J. M.* Tanaka K. L. Hare T. M. Tharsis-Centered and Other Fault Activity in the Thaumasia Region, Mars, Based on Detailed Mapping and GIS Analysis Hauber E. Giese B. Cook A. C. Digital Elevation Models of the Western Valles Marineris, Mars Slavney S. Arvidson R. E. Eliason E. M. Duxbury E. Lavoie S. K. The International Mars Data Base Eliason E. M. Garcia P. Larsen D. R. The Planetary Data System Mars Explorer Gaddis L. Anderson J. Becker K. Becker T. Cook D. Edwards K. Eliason E. Hare T. Kieffer H. Lee E. M. Mathews J. Soderblom L. Sucharski T. Torson J. McEwen A. Robinson M. An Overview of the Integrated Software for Imaging Spectrometers (ISIS) Eliason E. M. Production of Digital Image Models Using the ISIS System Torson J. M. Becker K. J. ISIS- a Software Architecture for Processing Planetary Images Tuesday, March 18, 1997 ACHONDRITES 6:30 p.m. LPI Kita N. T. Togashi S. Terashima S. Morishita Y. Yurimoto H. In Situ Ni Isotopic Analyses for Ureilitic Olivine Using Ion Probe Guan Y.* Crozaz G. Rare Earth Elements in Some Lithic and Mineral Clasts of Polymict Ureilites and Petrogenetic Implications Buchanan P. C.* Coetzee S. H. Reimold W. U. Reid A. M. Petrography and Mineral Chemistry of the Pipliya Eucrite Yamada I. Mikouchi T. Miyamoto M. Murakami T. Lamellar Inclusion in Olivine from Nakhla (SNC) Meteorite Wadhwa M. Crozaz G. Taylor L. A. McSween Jr. H. Y. Martian Basalt (Shergottite) QUE94201 and Lunar Basalt 15555: A Tale of Two Pyroxenes Hale V. P. S. McSween Jr. H. Y. Cumulus Pyroxene in Shergotty: The Discrepancy Between Experimental and Observational Studies Golden D. C. Thomas-Keprta K. L. McKay D. S. Wentworth S. J. Vali H. Ming D. W. Size Distribution of Magnetite in Carbonate Globules of ALH 84001 Martian Meteorite Steele A.* Goddard D. T. Grimes G. W. Stapleton D. Smith J. Tapper R. Grady M. McKay D. S. Gibson Jr. E. K. Thomas-Keprta K. L. Beech I. B. Scanning Proton Microprobe Analysis of Fragments of ALH84001 Flynn G. J.* Sutton S. R. Keller L. P. Element Abundance Patterns in Carbonate Globules and Rims from ALH 84001 Tuesday, March 18, 1997 ' DUST TO SPHERULES - CAPTIVE AND AT LARGE 6:30 p.m. LPI Durda D. D. Flynn G. J. An Experimental Study of the Impact Disruption of a Porous, Inhomogeneous Target Flynn G. J.* Atmospheric Entry Survival and the Possibility of Stratospheric Collection of Modern Interstellar Dust Graham G. A. Kearsley A. T. Grady M. M. Wright I. P. The Use of Digitised Back-Scattered Electron Imaging and Elemental Mapping for the Identification of Impact Residues in the Solar Array Panels of the Hubble Space Telescope. Nishioka K. Bunch T. Fonda M. Ryder J. Lovejoy S. Flynn G. Sutton S. R. Westphal A. Borg J. Trials and Tribulations of IDP Capture on MIR and Analyses Stratton D. M. Szydlik P. P. Modeling the Capture of Cosmic Dust Particles in Aerogel Zook H. A. Cooper B. L.* Potter A. E. The Zodiacal Light as Observed with the Clementine Startracker Cameras: Calibration and Image Analysis Procedures Tuesday, March 18, 1997 PLANETARY SURFACE PROCESSES 6:30 p.m. LPI Watters T. R. Robinson M. S. Cook A. C. Comparison of Discovery Rupes, Mercury with Terrestrial Thrust Faults: New Estimates of the Decrease in Radius of the Planet Due to Global Contraction Moore J. M. Schultz R. A. Grosfils E. B. Fori A. N. Roadarmel W. H. Bush N. I. Harris C. Ivers C. B. The 1996 Canyonlands Initiative: Field Study of Small Planetary Grabens Gregg T. K. P.* Fink J. H. Variations in Lava Flow Width Related to Effusion Rates Through Laboratory Simulations Peitersen M. N. Crown D. A. Intraflow Width Variations in Martian and Terrestrial Lava Flows Byrnes J. M. Crown D. A. Plaut J. J. Anderson S. W. Compressional Flow Ridges: Implications for Analysis of Planetary Lava Flows Muinonen P. J. Volcanic Resurfacing on Venus - Implications on Hypsometric and Age Distribution of the Surface Grosfils E. B. Head J. W. Magma Reservoir Failure: Implications for Volcano Growth on Venus and Mars Li L. Mustard J. F. He G. Compositional Gradients Across Mare-Highland Contacts: The Importance of Lateral Mixing Wentworth S. J. Keller L. P. McKay D. S. Space Weathering of Anorthosite from Apollo 16 Rock 62255: SEM Studies and Microspectrophotometry Komatsu G. Clute S. K. Baker V. R. Preliminary Remote-sensing Assessment of Pleistocene Cataclysmic Floods in Central Asia Leth P. T. Treiman A. H. Geology of the Reull Vallis Region of Mars: Evidence for Mid-Noachian Sheet Floods Cabrol N. A. Grin E. A. Pollard W. H. Perennial Frost Mounds in Gusev Crater (Mars) Desch S. J. Wilson G. R. Electrostatic Charging of Saltating Particles McHone J. F. Greeley R. Blumberg D. G. Comparison of Aerodynamic Roughness (Z-0) Values from Wind Measurements and SRL Radar; Western U.S. and Namibian Deserts. Evans R. J. Martin A. R. Carter T. Lei F. Ramsden D. Planetary Gamma-ray Spectrometry Using a CsI(Tl)-photodiode Array. He G. Mustard J. The Effects of Nonlinear Spectral Mixture Analysis on End-member Optimization in Analysis of Hyperspectral Image Data King T. V. V. Clark R. N. The Presence of a Single Absorption Feature: What It Does and Doesn't Imply Okada T. Kuwada Y. Effect of Surface Roughness on X-ray Fluorescence Emission from Planetary Surfaces Tuesday, March 18, 1997 OUTER PLANETARY SATELLITES 6:30 p.m. LPI Goreva J. S. Burnett D. S. Experimental Studies of S-rock Interactions. Implications for Io. Stansberry J. A. Spencer J. R. Howell R. R. Dumas C. Vakil D. Violent Silicate Volcanism on Io in 1996. Schenk P.* McKinnon W. Moore J. Stereo Topography of Valhalla and Gilgamesh Calvin W. M.* Spencer J. R. Relationship of Oxygen and Ozone on Ganymede: Observational and Theoretical Constraints Prieto O. Kargel J. S. The Interior Structure and Paleogeography of Ariel. Roush T. L.* Optical Constants of Amorphous Water Ice in the Near-Infrared Hansen G. B.* McCord T. B. Galileo NIMS Team Optical Properties of Water Ice Below 200 K McDonald G. D. Ockert-Bell M. E. Oxidative Destruction of Polymeric Material on the Surface of Europa Ori G. G. Baliva A. Marinangeli L. Bressan M. Dynamic of the Liquid Masses on Titan Hibbitts C. A. McCord T. B. Brown R. H. Jauman R. Trauthan F. Coradina A. Buratti B. J. Formisano V. Bellucci G. C. Radiometric Performance of the VIMS (Visible and Infrared Mapping Spectrometer) IR Channel on the Cassini Mission Dones L. Durisen R. H. Honeycutt R. K. Jurcevic J. S. Tripoli-Strom R. Showalter M. R. A Search for Saturnian Moonlets Using the WIYN Telescope Jarvis K. S. Vilas F. Larson S. M. Gaffey M. J. J VI Himalia: Narrowband Spectrophotometric Support of a C-Class Asteroid Origin Tuesday, March 18, 1997 FUTURE MISSIONS 6:30 p.m. LPI Wang A. Cortez E. Haskin L. A. A Raman Spectroscopic Sensor for On-Surface Planetary Remote Sensing Smrekar S. E. Stofan E. R. Gavit S. A. Powell G. E. New Millennium Deep Space Two: the Mars Microprobe Project Nelson R. M. Stofan E. R. Raymond C. A. Rayman M. D. The New Millennium Deep Space One Mission Stofan E. R. Raymond C. A. Gunson M. R. Nelson R. M. Smrekar S. E. The New Millennium Program: Technology for Exploration in the 21St Century Shepard M. K. Optical Methods for Planetary Landing Site Certification Weissman P. R. Champollion: A Comet Lander and Sample Return Demonstration Mission Wednesday, March 19, 1997 CHONDRULES 8:30 a.m. Room A Chair(s): J. N. Grossman J. M. Paque Weidenschilling S. J.* Production of Chondrules by Lightning in the Solar Nebula? Not So Easy! Hood L. L.* The Nebular Shock Wave Model for Chondrule Formation: Simulations and Comparisons with Meteoritic Constraints Ozawa K. Nagahara H.* Stability of Chondrule Melt in the Solar Nebula Ebel D. S.* Grossman L. Direct Condensation of Ferromagnesian Liquids from Cosmic Gases Paque J. M.* Cuzzi J. N. Physical Characteristics of Chondrules and Rims, and Aerodynamic Sorting in the Solar Nebula Lofgren G. E.* Chondrule Precursor Aggregates in UOC's: Implications for the Chondrule Forming Process Yu Y.* Hewins R. H. Evaporation of Potassium and Sodium Under Vacuum Conditions - Did Chondrules Really Form at Low Pressure? Tsuchiyama A.* Kondo M. Hirai H. Koishikawa A. High Resolution X-ray CT Images of Chondrites and Chondrules, and Their Three-dimensional Structures Alexander C. M. O'D.* Wang J. Determination of Chondrule Cooling Rates from Trace Elements Revisited Polnau E. Eugster O.* Krahenbuhl U. Marti K. Differential Irradiation Records in the H6 Chondrite ALH 76008: Evidence for a Nebular Origin of a Chondrule-like Inclusion? Schneider D. M.* Taunton A. Benoit P. H. Sears D. W. G. A Comparison of the Compositions of Chondrules in EH and EL Chondrites and Discussion of Some Implications Grossman J. N.* Alexander C. M. O'D. Wang J. Zoning of Trace Elements and Deuterium in the Mesostasis of Low-FeO Chondrules in Semarkona. Deloule E. Doukhan J. P. Robert F.* An Interstellar Isotopic Signature Recorded in Altered Pyroxene Chondrules Wednesday, March 19, 1997 MARS WATER, CLIMATE, AND LIFE 8:30 a.m. Room B Chair(s): C. C. Allen K. E. Herkenhoff Herkenhoff K. E.* Plaut J. J. Nowicki S. A. Surface Age and Resurfacing Rate of the North Polar Layered Terrain on Mars Frey H. V.* Roark J. H. Lowlying Ancient Terrain (LAT) on Mars: the Western Arabian Shelf (WAS) De Hon R. A.* The Relationship of Subdued Grooved Terrain, Mesas, and Knobs in Northern Elysium Planitia Mars Cabrol N. A.* Early Amazonian Lake in Gale Crater (Mars) Clifford S. M.* The Origin of the Martian Intercrater Plains: The Role of Liquefaction from Impact and Tectonic-Induced Seismicity Brain D. A.* Jakosky B. M. Loss of Martian Atmosphere by Impacts Since the Formation of the Martian Geologic Record Zent A. P.* The Role of Impact Gardening in Disturbing the Oxidation Stratigraphy of the Martian Regolith Mellon M. T.* Thermal Contraction Cracks in Martian Permafrost: Implications for Small-Scale Polygonal Features Gulick V. C.* Haberle R. M. McKay C. P. Episodic Greenhouse Climates on Mars Barlow N. G.* The Search for Possible Source Craters for Martian Meteorite ALH84001 Allen C. C.* Thomas-Keprta K. L. McKay D. S. Chafetz H. S. Nanobacteria in Carbonates Cady S. L.* Walter M. R. Des Marais D. J. Blank C. E. Exopaleontological Search Strategy for Mars Exploration: a Case for Siliceous Epithermal Deposits Nealson K. H.* Carr M. H. Clark B. C. Doolittle R. F. Jakosky B. M. Korwek E. L. Pace N. R. Poindexter J. S. Race M. S. Reysenbach A. L. Schopf J. W. Stevens T. O. Planetary Protection Measures for Mars Sample Return Wednesday, March 19, 1997 LUNAR HIGHLANDS CRUST 8:30 a.m. Room C Chair(s): C. A. Peterson G. Ryder Longhi J.* Descartesites: Missing(?) Pristine Rocks. Shervais J. W.* McGee J. J. KREEP in the Western Lunar Highlands: an Ion Microprobe Study of Alkali and Mg Suite Cumulates from the Apollo 12 and 14 Sites. Wang A.* Jolliff B. L. Viskupic K. M. Haskin L. A. Raman Spectroscopic Characterization of Different Types of Pyroxene Korotev R. L.* What Got Melted to Form Lunar Mafic Impact-melt Breccias? Ryder G.* Stockstill K. R. Constituents of the Lunar Crust at the Serenitatis Target: Least-squares Mixing Calculations for Apollo 17 Poikilitic Impact Melt Rocks Tompkins S.* Pieters C. M. Composition of the Lunar Crust Beneath the Megaregolith Hess P. C.* Parmentier E. M. The Evolution of the Early Lunar Crust Wieczorek M. A.* Phillips R. J. The Structure and Thickness of the Lunar Crust Haskin L. A.* The Distribution of Th on the Moon's Surface Wood C. A.* Non-Basaltic Early Lunar Magmatism Peterson C. A.* Hawke B. R. Lucey P. G. Taylor G. J. Blewett D. T. Spudis P. D. Lunar Anorthosite: Identification and Distribution of Remnants of the Primordial Crust. Pieters C. M.* Tompkins S. He G. Head J. W. Hess P. C. Mineralogy of the Mafic Anomaly at South Pole-Aitken and Implications for Mantle Excavation Clark P. E.* McFadden L. A. Mapping Iron Distribution in the Lunar Crust, Part 1: Establishing the Relationship Between Chemical and Mineralogical Iron Abundances and Albedo Wednesday, March 19, 1997 IRON METEORITES 8:30 a.m. Room D Chair(s): I. Casanova U. B. Marvin Ulff-Moller F.* Liquid Immiscibility in the IIAB Iron Meteorite Parent Body Petaev M. I.* Cr-bearing Minerals in the Gibeon IVA Iron: Indicators of Sulfur and Oxygen Fugacities in the Parent Body Marvin U. B.* Petaev M. I. Croft W. J. Killgore M. Silica Minerals in the Gibeon IVA Iron Meteorite Shukolyukov A.* Lugmair G. W. The 53Mn-53Cr Isotope System in the Omolon Pallasite and the Half-life of 187Re. Shen J. J.* Papanastassiou D. A. Wasserburg G. J. Re-Os Systematics in Pallasites and Mesosiderites Chen J. H.* Papanastassiou D. A. Wasserburg G. J. Re-Os Systematics in Chondrites and Iron Meteorites Smoliar M. I.* Walker R. J. Morgan J. W. Re-Os Isotopic Constraints on the Crystallization History of IIAB Iron Meteorites Horan M. F. Smoliar M. I. Walker R. J.* Morgan J. W. Coupled 182W and 187Re-187Os Isotopic Constraints on the Origin of Group IIAB, IVA, and IVB Iron Meteorites Palma R. L.* Mathew K. J. Marti K. Nitrogen Isotopic Signatures from the Metal Phase of IIE and IVA Iron Meteorites Holmden C.* Papanastassiou D. A. Wasserburg G. J. Negative Thermal Ionization Mass Spectrometry of Oxygen in Phosphates Wednesday, March 19, 1997 MASURSKY LECTURES: METEORITES ON ICE AND THE MARS CONNECTION 1:30 p.m. Building 2 Chair(s): D. Black D. Blanchard Cassidy W. A.* Masursky Lecture: Retrospective on the U.S. Antarctic Meteorite Program, Or: Fun and Games with Antarctic Meteorites, Or: Frozen Toes and Frozen Meteorites Pepin R. O.* The SNC-Viking Connection: Evidence and Arguments for Meteorites from Mars Wednesday, March 19, 1997 SYMPOSIUM: NEW RESULTS ON THE POSSIBILITY OF LIFE IN A MARTIAN METEORITE 2:30 p.m. Building 2 Chair(s): D. C. Black D. Blanchard McKay D. S.* Gibson Jr. E. K. Thomas-Keprta K. L. Romanek C. S. Allen C. C. Possible Biofilms in ALH84001 Bradley J. P. Harvey R. P.* McSween, Jr. H. Y. Magnetite Whiskers and Platelets in the ALH 84001 Martian Meteorite: Evidence of Vapor Phase Growth Thomas-Keprta K. L.* Romanek C. Wentworth S. J. McKay D. S. Fisler D. Golden D. C. Gibson Jr. E. K. TEM Analysis of Fine-grained Minerals in the Carbonate Globules of Martian Meteorite ALH84001 Shearer C. K.* Spilde M. N. Wiedenbeck M. Papike J. J. The Petrogenetic Relationship Between Carbonates and Pyrite in Martian Meteorite ALH84001 Leshin L. A.* McKeegan K. D. Harvey R. P. Oxygen Isotopic Constraints on the Genesis of Carbonates from Martian Meteorite ALH84001 Vali H.* Zhang C. Sears S. K Lin S. Phelps T. J. Cole D. Onstott T. C. Kirschvink J. L. Williams-Jones A. E. McKay D. S. Formation of Magnetite and Fe-rich Carbonates by Thermophilic Bacteria from Deep Terrestrial Subsurface: A Possible Mechanism for Biomineralization in ALH 84001 Thursday, March 20, 1997 CARBONACEOUS CHONDRITES 8:30 a.m. Room A Chair(s): L. B. Browning R. N. Clayton Podosek F. A.* Nichols Jr. R. H. Brannon J. C. Ott U. Is Only Cr Thoroughly Anomalous in Carbonaceous Chondrites? Ott U.* Specht S. Podosek F. A. An Exploratory Ion Probe Search for 54Cr-rich Grains in Orgueil Lauretta D. S.* Lodders K. Fegley, Jr. B. Kremser D. T. The Origin of Ni-bearing Sulfides in CI Carbonaceous Chondrites Guan Y.* Messenger S. Walker R. M. The Spatial Distribution of D-Enrichments in Renazzo Matrix Sephton M. A. Pillinger C. T. Gilmour I.* Evidence from the Isotopic Compositions of Individual Molecules for the Indegeneity of PAH in Meteorites Browning L.* Keil K. Were CM Chondrites Aqueously Altered in the Quiescent Interior of Their Parent Body? Hanowski N. P.* Brearley A. J. Chondrule Serpentines as Indicators of Aqueous Alteration in CM Carbonaceous Chondrites Clayton R. N.* Mayeda T. K. Kojima H. Weisberg M. K. Prinz M. Hydration and Dehydration in Carbonaceous Chondrites Krot A. N.* Brearley A. J. Biryukov V. V. Ulyanov A. A. Keil K. Swindle T. D. Mittlefehldt D. W. Dark Inclusions in the Reduced CV3 Chondrite Efremovka: Evidence for Various Degrees of Aqueous Alteration and Thermal Metamorphism Zolensky M.* Nakamura K. Weisberg M. Prinz M. A Primitive Dark Inclusion with Radiation-Damaged Olivine in the Ningqiang Carbonaceous Chondrite Brearley A. J.* Disordered Biopyriboles and Talc in Chondrules in the Allende Meteorite: Possible Origins and Formation Conditions Busemann H. Baur H. Wieler R.* Noble Gas Component "Q" in HF/HCL-resistant Residues of Unequilibrated Chondrites Nakamura T.* Zolensky M. E. Horz F. Takaoka N. Nagao K. Shock Effects on Phase Q and HL Diamonds Inferred from Experimental Shock Loading on Allende Meteorite. Thursday, March 20, 1997 VENUS REGIONAL AND GLOBAL ANALYSES 8:30 a.m. Room B Chair(s): R. J. Phillips J. J. Plaut Janes D. M.* Turtle E. P. Squyres S. W. Implications of Gravity Signatures of Radially Fractured Domes Kiefer W. S.* Mantle Plumes with Temperature-Dependent Viscosity: Implications for Interpretation of Gravity Anomalies on Venus Rosenblatt P.* Head J. W. Pinet P. C. Ivanov M. A. Collins G. Topographic and Stratigraphic Analysis of Two Venusian Volcanic Rises: Western Eistla and Bell Regiones Herrick R. R.* Marsh C. A. The Extinction Process for Venusian Domical Shield Volcanoes Ghent R. R.* Hansen V. L. Structural Analysis of Central and Eastern Ovda Regio, Venus Hansen V. L.* Willis J. J. Ribbon Terrain Formation and Implications for Lithosphere Evolution, Venus Ivanov M. A.* Head J. W. Stratigraphical Constrains on the Duration of Tessera Formation: Preliminary Results of the Regional Mapping of Venus Marinangeli L.* Tectonic Evolution of Western Ishtar Terra, Venus Bilotti F.* Suppe J. Wrinkle Ridges, Rifts and the Tectonic History of Venus Gauthier M.* Arkani-Hamed J. Interpretation of the Gravity Anomaly of Atalanta Planitia, Venus Plaut J. J.* Classification of Venus Surficial Units Using Magellan Data Hauck, II S. A.* Phillips R. J. Price M. Implications for Venusian Plains Resurfacing from Geomorphic Mapping and Impact Crater Densities Phillips R. J.* Hansen V. L. Venus Now and Then Kreslavsky M. A.* Muinonen P. Crater Size-Frequency Distribution on Venus: Variations with Elevation Thursday, March 20, 1997 LUNAR ORIGINS AND IGNEOUS EVOLUTION 8:30 a.m. Room C Chair(s): B. L. Jolliff D. J. Lindstrom Taylor S. R.* The Bulk Composition of the Moon Jakes P.* Jambon A. Similarity (Identity) of the Composition of the Earth's Lower Mantle and the Bulk Composition of the Moon? Alley K. M. Parmentier E. M.* Hess P. C. Numerical Experiments on Thermal Convection in a Chemically Stratified Viscous Fluid Heated from Below: Implications for a Model of Lunar Evolution Jolliff B. L.* Floss C. Liquid Immiscibility in a Lunar Plutonic Setting and the Evolution of KREEPY Residual Melts Herrell K. Nakamura K. Ryder G. Schuraytz B. Olivine Crystals and the Petrogenesis of the Apollo 15 Olivine-Normative Mare Basalts: 1. Petrography Snyder G. A.* Borg L. E. Lee D.-C. Taylor L. A. Nyquist L. E. Halliday A. N. Nd-Sr-Hf Isotopic and Geochronologic Studies of Apollo 15 Basalts Welten K. C.* Lindstrom D. J. Martinez R. R. Trace Elements in Basaltic Fragments from Luna 16 Soils. Shearer C. K.* Wiedenbeck M. Spilde M. N. Papike J. J. Minor and Trace Element Partitioning Between Immiscible High-Fe Basalts and High-Si Rhyolites: An Example from Melt Inclusions in Mare Basalts. Papike J. J.* Spilde M. N. Adcock C. T. Fowler G. W. Shearer C. K. Trace Element Fractionation by Impact-induced Volatilization: SIMS Study of Lunar HASP Glasses. Hess P. C.* Finnila A. Depths of Segregation of Hi-TiO2 Picrite Mare Glasses Symes S. J. K.* Formation of the Crystalline Lunar Spherules Hanson B. Lindstrom D. J.* Compositional Variability Among 74220 Orange Glass Beads and Their Crystallized Equivalents Rutherford M. J.* Weitz C. M. Oxidation State of the A17 Orange Glass Source as Inferred from Inclusions in Olivine Phenocrysts Thursday, March 20, 1997 THE IMPACT STORY - MECHANICS, EXPERIMENTS, MODELS 8:30 a.m. Room D Chair(s): W. B. McKinnon V. L. Sharpton Love S. G.* Ahrens T. J. Catastrophic Impacts and Asteroid Rotation Rates Crawford D. A.* Comet Shoemaker-Levy 9 Fragment Size and Mass Estimates from Light Flux Observations O'Keefe J. D.* Ahrens T. J. Complex Craters: Relationship of Inner Rings to the Impactor and Transient Crater Evolution Turtle E. P.* Pierazzo E. Constraints on the Size of the Vredefort Impact Crater from Numerical Modeling. Melosh H. J.* Pierazzo E. Impact Vapor Plume Expansion with Realistic Geometry and Equation of State Sugita S.* Schultz P. H. Adams M. A. In Situ Temperature Measurements of Impact-induced Vapor Clouds with a Spectroscopic Method Pope K. O.* Ocampo A. C. Baines K. H. Constraints on Volatile Production by the Chicxulub Impact Schultz P. H.* Sugita S. Fate of the Chicxulub Impactor Lyons J. R.* Ahrens T. J. Vasavada A. R. Global Effects of Impact Ejecta from the K-T Bolide Berthoud L.* Cintala M. J. Horz F. Velocity Determination for Ejecta from Craters in Coarse-Grained Sand Miller G. H.* Conditions for Single and Multimaterial Jets Housen K. R.* Voss M. E. Experimental Test for Size Effects in Impact Fragmentation Barnouin-Jha O. S.* Schultz P. H. Lever J. Wind Tunnel and Numerical Experiments Exploring the Interactions Between an Ejecta Curtain and an Atmosphere Thursday, March 20, 1997 EARLY SOLAR SYSTEM CHRONOLOGY 1:30 p.m. Room A Chair(s): J. N. Goswami T. LaTourrette LaTourrette T.* Wasserburg G. J. Mg Diffusion in Anorthite: Survival of the 26Al Chronometer Russell S. S.* Huss G. R. MacPherson G. J. Wasserburg G. J. Early and Late Chondrule Formation: New Constraints for Solar Nebula Chronology from 26Al/27Al in Unequilibrated Ordinary Chondrites Goswami J. N.* Marhas K. K. Sahijpal S. Production of Short-Lived Nuclides by Solar Energetic Particles in the Early Solar System Tera F.* Carlson R. W. Reexaming the U-Pb Chronometry of the Early Solar System Krestina N.* Jagoutz E. Kurat G. Sm-Nd System in Single Chondrules from Bjurbole L4 Chondrite Nyquist L.* Lindstrom D. Shih C.-Y. Wiesmann H. Mittlefehldt D. Wentworth S. Martinez R. Mn-Cr Isotopic Systematics of Chondrules from the Bishunpur and Chainpur Meteorites Lugmair G. W.* Shukolyukov A. 53Mn-53Cr Isotope Systematics of the HED Parent Body. Hsu W.* Huss G. R. Wasserburg G. J. Mn-Cr Systematics of Differentiated Meteorites Garrison D. H.* Bogard D. D. 39Ar-40Ar Ages and Trapped and Cosmogenic Noble Gases in Winonaite Meteorites Bogard D. D.* Garrison D. H. 39Ar-40Ar Ages of Igneous Non-Brecciated Eucrites Ganguly J.* Stimpfl M. Molin G. Orthopyroxene Chronometry of Meteorites: II. Towards a General Relation Between Cooling Rate and Closure Temperature of Cation Ordering and Application to the Steinbach Meteorite. Meyer B. S.* Luo N. Monte-Carlo Modeling of Extinct Short-Lived r-Process Radioactivities Thursday, March 20, 1997 VENUS: THE LITHOSPHERE AND THE ATMOSPHERE 1:30 p.m. Room B Chair(s): W. H. Roadarmel Johnson C. L.* Solomon S. C. Sandwell D. T. Simons M. Global and Regional Resolution Studies of Magellan Gravity Data: Implications for Inferring Lithospheric Thickness. Rathbun J. A.* Janes D. M. Squyres S. W. Gradients in Extension and Strain at Beta Regio, Venus Koenig E.* Aydin A. Numerical Modeling of Possible Strike-Slip Faulting in Lavinia Planitia, Venus Roadarmel W. H.* Schultz R. A. Large Slopes in Venusian Layered Basalt: Too Stable for Failure? Bullock M. A.* Grinspoon D. H. Cloud-Climate Interactions on Venus Kaula W. M.* Newman W. I. An Impact Hypothesis for Venus Argon Anomalies Thursday, March 20, 1997 MERCURY 3:00 p.m. Room B Chair(s): T. H. Morgan Morgan T. H.* Killen R. M. Modeling Episodic Release of 40Ar Release from the Moon with Implications for the Ar Atmosphere of Mercury Slade M. A.* Jurgens R. F. Rojas F. New Radar Topography of Mercury and the Need for a Mercury DTM Jurgens R. F.* Slade M. A. Rojas F. New 3.5-cm Wavelength Radar Images of the Equatorial Regions of Mercury Robinson M. S.* Hawke B. R. Lucey P. G. Taylor G. J. Spudis P. D. The Color of Mercury Peale S. J.* Characterizing the Core of Mercury Phillips R. J.* Solomon S. C. Compressional Strain History of Mercury Zuber M. T.* Smith D. E. Remote Sensing of Planetary Librations from Gravity and Topography Data: Mercury Simulation Thursday, March 20, 1997 LUNAR MARE BASALT DIVERSITY AND DISTRIBUTION 1:30 p.m. Room C Chair(s): C. R. Coombs L. A. Taylor Head J. W.* Wilson L. Wilhelms D. Lunar Mare Basalt Volcanism: Early Stages of Secondary Crustal Formation and Implications for Petrogenetic Evolution and Magma Emplacement Processes Giguere T. A.* Blewett D. T. Lucey P. G. Taylor G. J. Hawke B. Ray Refinement of the Classification of Lunar Mare Basalts Using the Abundances of FeO, TiO2, and Olivine. Gaddis L.* Robinson M. Hawke B. R. Analyses of Three Classes of Small Lunar Pyroclastic Deposits with Clementine Data Blewett D. T.* Lucey P. G. Hawke B. R. Jolliff B. L. FeO Mapping of the Moon: Refinement Using Images of the Sample-Return Stations Weitz C. M.* Head III J. W. Pieters C. M. Geology of the Lunar Regional Dark Mantle Deposits as Seen by Clementine UVVIS Data Lucey P. G.* Hinrichs J. L. Taylor G. J. Robinson M. S. Mapping Olivine Basalts Using Near-IR Multispectral Imaging Martin P. D.* Pinet P. C. Chevrel S. D. The Mare Humorum Region of the Moon: New Optical, Compositional, and Geological Inferences from Clementine. Gillis J. J.* Spudis P. D. Bussey D. B. J. The Geology of Smythii and Marginis Basins Using Integrated Remote Sensing Techniques: A Look at What's Around the Corner Yingst R. A.* Head J. W. Multispectral Analysis of Mare Deposits in South Pole/Aitken Basin Antonenko I.* Head J. W. Pieters C. M. Cryptomare Delineations Using Craters as Probes to Lunar Stratigraphy: Use of Multispectral Clementine Data as a Tool Pinet P. C.* Shevchenko V. V. Chevrel S. D. Reiner Gamma Formation from Clementine UV-Visible Spectro-Imaging Data: The Lunar Chronology and Iron Content Campbell B. A.* Hawke B. R. Thompson T. W. Comparison of Radar and Clementine Multispectral Reflectance Data for the Lunar Maria Thursday, March 20, 1997 TERRESTRIAL IMPACT STRUCTURES, EJECTA, AND TEKTITES 1:30 p.m. Room D Chair(s): J. M. Boyce M. J. Cintala Shoemaker E. M.* Wynn J. C. Geology of the Wabar Meteorite Craters, Saudi Arabia Koeberl C.* Reimold W. U. Armstrong R. A. Brandstaetter F. Kruger F. J. Morokweng, South Africa: the Jurassic-Cretaceous Boundary Impact Structure? Shoemaker E. M.* Shoemaker C. S. Notes on the Geology of Liverpool Crater, Northern Territory, Australia Poag C. W.* Hutchinson D. R. Colman S. M. The Chesapeake Bay Impact Crater: an Update Buchanan P. C.* Reimold W. U. Koeberl C. Further Stratigraphic and Structural Constraints on the Origin of the Bushveld Complex, South Africa Ivanov B. A.* Deutsch A. Ostermann M. Ariskin A. Solidification of the Sudbury Impact Melt Body and Nature of the Offset Dikes - Thermal Modeling Hough R. M.* Masaitis V. L. Gilmour I. Pillinger C. T. Diamond and Silicon Carbide at the Ries and Popigai Impact Craters Monteiro J. F.* Ribeiro A. Munha J. Fonseca P. E. Brandao Silva J. Moita C. Galopim de Carvalho A. Ejecta from Meteorite Impact near the Cenomanian-Turonian Boundary Found at North of Nazare, Portugal Simonson B. M.* Beukes N. J. Hassler S. Discovery of a Neoarchean Impact Spherule Horizon in the Transvaal Supergroup of South Africa and Possible Correlations to the Hamersley Basin of Western Australia Ocampo A. C.* Pope K. O. Fischer A. G. Carbonate Ejecta from the Chicxulub Crater: Evidence for Ablation and Particle Interactions Under High Temperatures and Pressures Wu J. Glass B. P.* Unmelted Impact Ejecta Associated with the Australian Microtektite Layer Heymann D. Yancey T. E.* Wolbach W. S. Johnson E. A. Roach D. Moecker S. Carbon in Sediments at the KT Boundary Site of the Brazos River, Texas Kring D. A.* Composition of Earth's Continental Crust as Inferred from the Compositions of Impact Melt Sheets Thursday, March 20, 1997 MOST METEORITES 6:30 p.m. LPI Bridges J. C. Franchi I. A. Hutchison R. Sexton A. S. Pillinger C. T. Mineralogical and Oxygen Isotopic Constraints on the Formation of Chainpur (LL3) and Parnallee (LL3) Chondrules Kuebler K. E. McSween, Jr. H. Y. Carlson W. D. Size Distributions and the Mass Equivalence of Chondrules and Metal Grains in Bjurbole Russell P. Lofgren G. E. Chondrule Precursor Aggregates in UOC's: Petrography and History Ruzicka A. Snyder G. A. Taylor L. A. Large Chondrules and Lithic Clasts in Julesberg (L3) and Other Ordinary Chondrites: Bulk-Chemical Characterization Dikov Yu. P. Gerasimov M. V.* Wlotzka F. Yakovlev O. I. High-Temperature Vaporization of Meteorites. Paque J. M.* Le L. Lofgren G. E. An Experimental Study on the Effects of Repeated Heating Events on a CAI Bulk Composition Ito M. Yurimoto H. Morioka M. Nagasawa H. REE Diffusivities in Melilite: A Preliminary Study by SIMS Depth Profile Method Hiroi T.* Zolensky M. E. Pieters C. M. Characterization of Unusual CI/CM/CR Meteorites from Reflectance Spectroscopy. Krol E. A. Lang B. Magnetic Hysteresis Parameters for Two Antarctic (Yamato-82050, Yamato-791717) and Two Africane (Acfer-059, Acfer-202) Carbonaceous Chondrites Hanowski N. P. Brearley A. J. Parent Body Alteration of Large Metal Inclusions in the CM Carbonaceous Chondrite, Murray Hua X. Buseck P. R. Magnetite in Carbonaceous Chondrites Biryukov V. V. Korotaeva N. N. Gouseva E. V. Krot A. N. Ulyanov A. A. Dark Inclusions in the CV3 Carbonaceous Chondrite Efremovka: Textural and Mineralogical Observations. Brearley A. J. Contrasting Microstructures of Fayalitic Olivine in Matrix and Chondrules in the Allende CV3 Chondrite Guan Y. Zolensky M. E. The D/H Ratios of Round Phyllosilicate and Glass Spherules in the Al Rais (CR) Chondrite Akridge J. M. C.* Benoit P. H. Sears D. W. G. Fusion Crust and the Measurement of Surface Ages of Antarctic Ordinary Chondrites Wasilewski P. J.* Dickinson T. L. Connerney J. E. Funaki M. Magnetic Signatures of Large Meteorites Yurimoto H.* Kuramoto K. Si Fractionation of Chondrite Parent Bodies by Bipolar Outflow. Lukacs B.* Berczi Sz. Statistical Analysis of the NIPR (Japan) Antarctic Chondrites: Paths of Thermal Evolution of Parent Bodies? Berczi Sz. Lukacs B.* Wiik's Double Line Reanalyzed Benoit P. H.* Akridge J. M. C. Sears D. W. G. Pillinger C. T. Bland P. A. The Weathering of Antarctic Meteorites: Climatic Controls on Weathering Rates and Implications for Meteorite Accumulation. Sharp T. G.* Chen M. El Goresy A. Mineralogy and Microstructures of Shock-Induced Melt Veins in the Tenham (L6) Chondrite Grier J. A. Swindle T. D. Kring D. A. 40Ar/39Ar Analyses of Orvinio (H6): Further Lessons on Incomplete Degassing of Impact Melt Breccias Zinovieva N. G. Mitreikina O. B. Granovsky L. B. Unusual Phosphate in Hercynite-kamacite Objects in the Yamato-82133 Ordinary Chondrite (H3). Reid A. M. Olivine and Pyroxene Compositions in LL6 Chondrites from Antarctica Nehru C. E. Weisberg M. K. Prinz M. Chromites in Unequilibrated Ordinary Chondrites Weisberg M. K.* Fogel R. A. Prinz M. Kamacite-Enstatite Intergrowths in Enstatite Chondrites Lin Y.* Kimura M. Thermal Histories and Parent Body(ies) of EH Chondrites: Evidences from New Highly Equilibrated EHs (Y793225, 82189, 8404, 8414 and 86004) Rooke G. P. Franchi I. A. Verchovsky A. B. Grady M. M. Pillinger C. T. Isotopically Heavy Nitrogen in the Bencubbin Breccia: A Lonely Anomaly Meshik A.* Hohenberg C. Kehm K. Swan P. Dymkov Yu. Chemically Fractionated Fission (CFF) Xe in Okelobondo (Zone 13 of Oklo): Implications for the Origin of Terrestrial Xenon Ocker K. Thonnard N. The Path to Krypton and Xenon Isotope Measurements from Few-Micron-Sized Samples Britt D. T. Consolmagno S.J. G. J. The Porosity of Meteorites and Asteroids: Results from the Vatican Collection of Meteorites. Ulff-Moller F.* Tran J. Choi B.-G. Haag R. Rubin A. E. Wasson J. T. Esquel: Implications for Pallasite Formation Processes Based on the Petrography of a Large Slab Petaev M. I.* Marvin U. B. Mineralogy and Origin of Brassy, Sulfide-rich Masses in the Gibeon IVA Iron Budka P. Z. Viertl J. R. M. Thamboo S. V. LaRose R. E. Mundrabilla's Anomalous Macrostructural Features Revealed as Microgravity Cast Structures Based on Classical Solidification Principles. Killgore B. M. Imilac Strewnfield, Chile, Revisited Petaev M. I. Marvin U. B. Killgore M. Mineralogy of Sulfide-bearing Vugs in the Gibeon IVA Iron Zipfel J.* Hutcheon I. D. Marti K. Carbon Isotopic Composition of Graphite Grains in the El Taco IAB Iron Meteorite Thursday, March 20, 1997 IMPACT - MECHANICS, PROCESSES, AND MATERIALS 6:30 p.m. LPI Raitala J. T. Impact vs. Post-impact Metamorphosis in Impactite Garnet Feldman V. I. Sazonova L. V. Kozlov E. A. Zhugin YU. N. Migration of Some Chemical Elements in Spherical Stress Waves. Heymann D. Dressler B. Raman Study of Carbonaceous Matter and Anthraxolite in Rocks from the Sudbury, Ontario, Impact Structure Abate B. Koeberl C. Underwood J. R. Reimold W. U. Buchanan P. Fisk E. P. Giegengack R. F. BP and Oasis Impact Structures, Libya: Preliminary Petrographic and Geochemical Studies, and Relation to Libyan Desert Glass Newman S.* Beckett J. Stolper E. 3-D Variations of Water Content in an Indochinite Phelps A. W. Raman Spectroscopic Analysis of Microdiamonds from the Popigai Crater Schuraytz B. C. Dressler B. O. Ballen-Structured Quartz in Glasses of the Wanapitei Impact Structure, Ontario, Canada van der Bogert C. H.* Schultz P. H. Pseudotachylites in Meteorites: Friction Melting as an Alternative to Shock Darkening Preisinger A.* Aslanian S. Brandstatter F. Grass F. Formation of Spinels in the Mesosphere After K/T Impact Faust J. L.* Tyburczy J. A. Ahrens T. J. Xu X. Epstein S. Impact Chemistry of Serpentine-Iron Planetesimals Albin E. F.* Redistribution of Georgia Tektites as Channel Lag Deposits Bottke, Jr. W. F. Richardson D. C. Love S. G. Making Crater Chains on the Earth and Moon with Planetary Tidal Forces Durda D. D. Kring D. A. Pierazzo E. Melosh H. J. Model Calculations of the Proximal and Globally Distributed Distal Ejecta from the Chicxulub Impact Crater Shevchenko V. V. The Impact Record of Disrupted Comet on the Moon Dressler B. O. Sharpton V. L. Shock Attenuation Across the Central Portion of a Complex Impact Structure: Slate Islands, Lake Superior, Canada Herrick R. R. Sharpton V. L. Shallow Seismic Test at Marquez Impact Structure Korol A. B. Kamensky K. K. Catastrophic Events on the Terrestrial Planetary Bodies in Phanerozoic Period Sharpton V. L. Copeland P. Dressler B. O. Spell T. L. New Age Constraints on the Slate Islands Impact Structure, Lake Superior, Canada Cintala M. J. Berthoud L. Horz F. Peterson R. K. Jolly G. D. A Method of Measuring Ejection Velocities During Experimental Impact Events. Wetherill G. W.* Chambers J. E. Numerical Integration Study of Earth Impact by Meteoroids from the 3:1 Resonance McHone J. F.* Greeley R. More Impact and Impact-Like Structures on SIR-C Radar; Europe, Africa, and Arabian Peninsula Thursday, March 20, 1997 LUNAR MARIA 6:30 p.m. LPI Agee C. B.* Smith J. R. Courtial P. Density Crossovers in Lunar Picrites Snyder G. A. Neal C. R. Taylor L. A. The Mantle Sources of Mare Basalts: Light Lithophile Element Modeling of the Magma Ocean and Low-Ti Basalts Nakamura K. Herrell K. Ryder G. Schuraytz B. Olivine Crystals and the Petrogenesis of the Apollo 15 Olivine-Normative Mare Basalts: 2. Mineral Chemistry Lucey P. G. Hinrichs J. L.* Robinson M. S. Johnson J. Peterson C. A. Domergue-Schmidt N. Taylor G. J. Near-Infrared (1.0-2.0 Microns) Global Imaging of the Moon Lucey P. G. Blewett D. T. Some Issues Related to Lunar FeO and TiO2 Multispectral Mapping Merenyi E. McEwen A. S. Robinson M. S. Craddock R. A. Spectral Mapping of Mare Moscoviense, Lunar Farside, from Clementine UVVIS Data Craddock R. A. Robinson M. S. Hawke B. R. McEwen A. S. Clementine-based Geology of the Moscoviense Basin, Lunar Farside Jolliff B. L. Clementine UV-VIS Multispectral Data and the Apollo 17 Landing Site: What Can We Tell and How Well? Antonenko I.* Cintala M. J. Head J. W. Horz F. Results of Experimental Dark Halo Crater Studies: Implications for Lunar Cryptomare Thickness Measurements Jerde E. A. Glasgow D. C. Snyder G. A. Taylor L. A. "Sleeping Rea