Lunar and Planetary Institute






25st Lunar and Planetary Science Conference

TABLE OF CONTENTS

no.

Magnetic Properties of Zagami and Nakhla
D. P. Agerkvist, L. Vistisen, M. B. Madsen, J. M. Knudsen
  1001

Martian Fluvio-Thermal Erosion: Experimental Project
J. Aguirre-Puente, F. Costard, N. Makhloufi
  1002

Radiative signals from impact of Shoemaker-Levy on Jupiter
T. J. Ahrens, G. S. Orton, T. Takata, J. D. Okeefe
  1003

Chondrules from Chondrules? an Ion Probe Trace Element Study
C. M. O'd. Alexander
  1004

Evidence for Short SiC Lifetimes in the ISM
C. M. O'd. Alexander
  1005

CL and Alkali Metasomatism in Unequilibrated Ordinary Chondrites
C. M. O'd. Alexander, J. C. Bridges, R. Hutchison
  1006

Distributions of the Preatmospheric Sizes of Antarctic and Non-Antarctic Chondrites
V. A. Alexeev
  1007

On Calculation of Cosmic-Ray Exposure Ages of Meteorites
V. A. Alexeev
  1008

Short Life of Small Meteorites in the Cosmic Space?
V. A. Alexeev
  1009

Meteorites as Differential Detectors of Events Over a Long Time Scale
V. A. Alexeev, G. K. Ustinova
  1010

New prospects for analyzing lunar pyroclastic glass
C. C. Allen, L. P. Keller, J. P. Bradley, D. E. Brownlee, D. S. McKay
  1011

Reduction of lunar mare soil and pyroclastic glass
C. C. Allen, R. V. Morris, D. S. McKay
  1012

Calorimetric thermometry of meteoritic troilite: Preliminary thermometer relationships
J. H. Allton, S. J. Wentworth, J. L. Gooding
  1013

C-, N-, O-, Si-, and Ti-Isotopic Ratios of Low Density Graphite Grains from Murchison Indicate a Supernova Origin
S. Amari, E. Zinner, R. S. Lewis
  1014

Lithospheric Controls on the Formation of Valles Marineris
F. S. Anderson, R. E. Grimm
  1015

Bunte Breccia-like Deposits Within the Manson Impact Structure (Iowa); Evidence for Impact into a Shallow Marine Environment?
R. R. Anderson, B. J. Witzke
  1016

Surface Characteristics of Steep-Sided Domes on Venus and Terrestrial Silicic Domes: A Comparison
S. W. Anderson, D. A. Crown, J. J. Plaut, E. R. Stofan
  1017

Cryptomaria in the Schiller-Schickard, Mare Humorum and Western Oceanus Procellarum Areas: Studies Using Dark-Halo Craters
I. Antonenko, J. W. Head
  1018

Computer Simulation of Low Pressure Melting in Meteoritic Igneous Systems
A. A. Ariskin, M. I. Petaev
  1019

Oblique Impact: Atmospheric Effects
N. A. Artem'eva, V. V. Shuvalov
  1020

Laboratory Simulations of Large-Scale Vortex Flows Generated at Impacts on Venus and on Earth
V. I. Artem'ev, V. A. Rybakov, S. A. Medveduk, B. A. Ivanov
  1021

The surface and interior of PHOBOS
E. Asphaug, W. Benz
  1022

Stratigraphy of Small Volcanoes and Plains Terrain in Vellamo Planitia, Venus
J. C. Aubele
  1023

Stepping into Space: Getting Involved in Pre-College Outreach
J. C. Aubele, P. H. Schultz
  1024

A Mercury Orbiter Mission: Report on the European Space Agency's Assessment Study
A. Balogh, R. Grard, G. Scoon, M. Hechler
  1025

Gravity Studies of Mead Crater, Venus
W. B. Banerdt, N. J. Rappaport, W. L. Sjogren, R. E. Grimm
  1026

Mars Soil: Nanophase Minerals and Formation Processes
A. Banin
  1027

The Hypsometric Distribution of Impact Craters on Venus
M. Banks, S. Emerson, R. G. Strom, G. G. Schaber
  1028

Observational and Computational Evidence for Gravitationally Stable Particle Accretions in the Perseid Meteor Stream
J. C. Barentine
  1029

Impact Craters as Indicators of Subsurface H2O on Mars
N. G. Barlow
  1030

A Quantitative Assessment of an Impact Generated Ring Vortex
O. S. Barnouin, P. H. Schultz
  1031

Concentric Wrinkle Ridge Pattern Around Sif and Gula
A. T. Basilevsky
  1032

Preliminary Stratigraphic Basis for Geologic Mapping of Venus
A. T. Basilevsky, J. W. Head
  1033

Geology and Morphometry of Large Impact Craters of Venus
A. T. Basilevsky, B. A. Ivanov, P. G. Ford, C. M. Weitz
  1034

Variations in Mars' North Residual Polar CAP Frost Coverage in Mariner 9 and Viking Images
D. S. Bass, K. E. Herkenhoff, D. A. Paige
  1035

Single agglutinates: A comparative study of compositions of agglutinitic glass, whole-grain, bulk soil, and FMR
A. Basu, R. Robinson, D. S. McKay, D. P. Blanchard, R. V. Morris, S. J. Wentworth
  1036

Deep Melting and Residual Garnet in the Sources of Lunar Basalts: Lu-Hf Isotopic Systematics
B. L. Beard, G. A. Snyder, L. A. Taylor
  1037

CoMA: A Cometary Matter Analyzer for In Situ Analysis with High Mass Resolution
P. Beck, J. Kissel
  1038

Solar Wind Gases in a Metal Separate from Lunar Soil 68501: A Followup Study
R. H. Becker, R. O. Pepin
  1039

The Partitioning of NA Between Melilite and Liquid: an Experimental Study with Applications to Type B CAIs
J. R. Beckett, E. M. Stolper
  1040

High spatial resolution telescopic multispectral imaging and spectroscopy of the Moon. 1: The Serenitatis/Tranquillitatis border region
J. F. Bell III, B. R. Hawke
  1041

High resolution visible to short-wave near-infrared CCD spectra of Mars during 1990
J. F. Bell III, K. Bornhoeft, P. G. Lucey
  1042

Absolute calibration and atmospheric versus mineralogic origin of absorption features in 2.0 to 2.5 micron Mars spectra obtained during 1993
J. F. Bell III, J. B. Pollack, T. R. Geballe, D. P. Cruikshank, R. Freedman
  1043

Wavelength calibration techniques and subtle surface and atmospheric absorption features in the Mariner 6, 7 IRS reflectance data
J. F. Bell III, T. L. Roush, T. Z. Martin, J. B. Pollack, R. Freedman
  1044

Ordinary Chondrites in Space and Time
J. F. Bell
  1045

Geologic Map of Callisto
K. C. Bender, R. Greeley, J. W. Rice Jr., D. E. Wilhelms
  1046

Pre-Impact Orbital Evolution of P/Shoemaker-Levy 9
L. A. M. Benner, W. B. McKinnon
  1047

Post-Shock Cooling and Annealing Within L-Group Ordinary Chondrites
M. E. Bennett, H. Y. McSween Jr.
  1048

Primitive Material in Lunar Highland Soils
P. H. Benoit, J. D. Batchelor, S. J. Symes, D. W. G. Sears
  1049

Natural Thermoluminescence Profiles in Meteorites: Cosmogenic and Terrestrial Profiles in Falls and Finds
P. H. Benoit, Y. Chen, D. W. G. Sears
  1050

Shoemaker-Levy 9 and the tidal disruption of comets
W. Benz, E. Asphaug
  1051

Refractory Carbides in Interstellar Graphite
T. J. Bernatowicz, S. Amari, R. S. Lewis
  1052

Origin of Amorphous Rims on Lunar Soil Grains
T. J. Bernatowicz, R. H. Nichols Jr., C. M. Hohenberg
  1053

Craters in Aluminum 1100 Targets Using Glass Projectiles at 1-7 km/s
R. P. Bernhard, T. H. See, F. Hörz, M. J. Cintala
  1054

A Martian Mantle with Peridotitic Versus Chondritic Mg/Si and Al/Ca Ratios: Implications for Mantle Mineralogy and Melting Reactions
C. M. Bertka
  1055

Thermal Inertias in the Upper MM of the Martian Surface Derived Using the PHOBOS Shadow
B. H. Betts, B. C. Murray, T. Svitek
  1056

Magellan LOS Gravity of Venus Plains Regions: Lithospheric Properties and Implications for Global Tectonics
D. L. Bindschadler
  1057

The Unique Carbonaceous Chondrite ACFER 094: The First CM3 Chondrite (?)
A. Bischoff, T. Geiger
  1058

Reflectance Spectra of Mars Soil Analogs Measured Under Reduced Atmospheric Pressures and Temperatures
J. L. Bishop, C. M. Pieters
  1059

Spectroscopic and Geochemical Analyses of Sediments from Lake Hoare, Antarctica and Applications to Dry Valleys on Mars
J. L. Bishop, P. A. J. Englert, D. W. Andersen, C. Kralik, C. Koeberl, C. M. Pieters, H. Froeschl, R. A. Wharton Jr.
  1060

A mineralogical instrument for planetary applications
D. F. Blake, D. T. Vaniman, D. L. Bish
  1061

Infrared Spectrophotometry of Io Between 3 and 13 μm in 1993
D. L. Blaney, M. S. Hanner, R. Russell, D. Lynch, J. Hackwell
  1062

Measuring track densities in lunar grains using image analysis
G. E. Blanford, D. S. McKay, R. P. Bernhard, C. K. Schulz
  1063

A Spectral Survey of the Crisium Region of the Moon
D. T. Blewett, B. R. Hawke, P. G. Lucey, P. D. Spudis
  1064

Venus: Influence of Surface Roughness on the Threshold for Windblown Sand Derived from Magellan Data
D. G. Blumberg, R. Greeley
  1065

Mars Cartographic Coverage: Status Prior to Mars-94 Mission
N. N. Bobina, G. A. Burba
  1066

Geometrical Transformation of Panoramas of Mars Surface Received from Phobos-2 Space Station
I. M. Bockstein, M. A. Kronrod, Yu. M. Gektin
  1067

Fe and MN Systematics in Experimental Analogues of Murchison and a 65% H Chondrite-35% CM Chondrite
J. S. Boesenberg, J. S. Delaney
  1068

Ar-39-Ar-40 ages of four ureilites
D. D. Bogard, D. H. Garrison
  1069

Bromine in Interplanetary Dust Particles
J. Bohsung, P. Arndt, E. K. Jessberger
  1070

The Solubility of Platinum in silicate Melts: Experiments Under Oxidizing Conditions
A. Borisov, H. Palme, B. Spettel
  1071

Phosphorus Chemistry in the Atmospheres of Jupiter and Saturn
S. Borunov, V. Dorofeeva, I. K. Khodakovsky, P. Drossart, E. Lellouch, Th. Encrenaz
  1072

Axial Focusing of Seismic Energy from a Large Impact on Earth: Preliminary Numerical Simulations
M. B. Boslough, E. P. Chael
  1073

Comet Shoemaker-Levy 9: an Upper Bound on Its Mean Density
A. P. Boss
  1074

Midplane Temperatures and Solar Nebula Evolution
A. P. Boss
  1075

Injection of Presolar Grains into the Solar Nebula by a Stellar Shock Wave
A. P. Boss, P. N. Foster
  1076

Provenance of the Spacewatch Small Earth-Approaching Asteroids
W. F. Bottke Jr., M. C. Nolan, R. Greenberg, A. M. Vickery, H. J. Melosh
  1077

Spacing Distributions and Intersection Angles for Kilometer Scale Lineations on the Plains of Venus
D. D. Bowman, C. G. Sammis, W. B. Banerdt
  1078

Vapor Transport, Weathering, and the Highlands of Venus
R. A. Brackett, B. Fegley Jr., R. E. Arvidson
  1079

Reflectance Spectroscopy of Individual Interplanetary Dust Particles
J. P. Bradley, D. E. Brownlee, L. P. Keller
  1080

Rb-Sr Dating of Alkaline and Mafic Intrusives from the Pretoria Saltpan Impact Crater and Environs
D. Brandt, W. U. Reimold, C. B. Smith
  1081

Your Own Educational Outreach Program: It's Not as Hard as You Think
R. H. Brazzle, B. M. Barker, L. C. McLeod, C. M. Hohenberg
  1082

Metamorphic Effects in the Matrices of CO3 Chondrites: Compositional and Mineralogical Variations
A. J. Brearley
  1083

Metamorphism in the CO3 Chondrites: Trace Element Behavior in Matrices and Rims
A. J. Brearley, S. Bajt, S. R. Sutton
  1084

Pancake Domes on Venus and the Seafloor
N. T. Bridges
  1085

Release of Light Nitrogen from Apollo 12023 <10 μm Fraction by a Combination of Pyrolysis-Combustion
D. R. Brilliant, I. A. Franchi, C. T. Pillinger
  1086

The 15N-rich Low-temperature Nitrogen Component in Lunar Soils-An Ammonia Related Species?
D. R. Brilliant, A. D. Morse, J. Higgins, I. A. Franchi, C. T. Pillinger
  1087

'Space Weathering' and the Ordinary Chondrites
D. T. Britt, B. E. Clark
  1088

Cat Mountain: Spectra and Petrology of an L5 Impact-Melt Breccia
D. T. Britt, D. A. Kring
  1089

Tectonics of Artemis Corona, Venus: Implications for Formation and Evolution
C. D. Brown, R. E. Grimm
  1090

Alteration and formation of rims on the CM parent body
L. B. Browning, H. Y. McSween Jr., M. Zolensky
  1091

Eureka] Aerogel capture of meteoroids in space
D. E. Brownlee, F. Horz, L. Hrubsch, J. A. M. McDonnell, P. Tsou, J. Williams
  1092

Identification and Analysis of Cometary IDPs
D. E. Brownlee, D. J. Joswiak, S. G. Love, J. P. Bradley, A. O. Nier, D. J. Schlutter
  1093

Considerations for Planetary Gamma-Ray Spectroscopy of the Surface of Mercury
J. Brückner, U. Fabian, M. Wieder
  1094

Lava Flow Rheology: A Comparison of Data and Theory
B. C. Bruno, S. M. Baloga, G. J. Taylor, M. J. Tatsumara
  1095

Venus climate stability and volcanic resurfacing rates
M. A. Bullock, D. H. Grinspoon, J. B. Pollack
  1096

Modified Lava Domes on Venus
M. H. Bulmer, J. E. Guest
  1097

Thematic Map Types Possible for Mars: Mars-94 Mission Cartographic Perspectives
G. A. Burba
  1098

Zhamanshin Astrobleme: Review and First Results of 1992 Landscape and Geomorphic Survey
G. G. Burba Jr., V. A. Meshcherskaya
  1099

Questions Concerning the Oxidation of Ferrous Iron in Carbonaceous Chondrites
T. H. Burbine, R. G. Burns
  1100

Are Steep Slopes on Venus Preserved as a Result of Chemical Cementation of Pore-Spaces in Surface Rocks?
K. Burke, B. Fegley Jr., V. L. Sharpton
  1101

Schwertmannite on Mars: Deposition of This Ferric Oxyhydroxysulfate Mineral in Acidic Saline Meltwaters
R. G. Burns
  1102

Crustal Recycling Due to Mantle Flow-Driven Crustal Thickening: A Preliminary Assessment
J. D. Burt, E. M. Parmentier, J. W. Head
  1103

Modelling the Formation of Venusian Channels
D. B. J. Bussey, S. A. Sørensen, J. E. Guest
  1104

Light Element Isotopic Composition in the Wind of a Typical AGB Star
M. Busso, R. Gallino, C. M. Raiteri, G. J. Wasserburg
  1105

Martian Polar Regions: 35-cm Radar Images
B. J. Butler, D. O. Muhleman, M. A. Slade
  1106

Fluvial processes in Ma'adim Vallis and the potential of Gusev crater as a high priority site
N. Cabrol, R. Landheim, R. Greeley, J. Farmer
  1107

Comparative Results from Giant Impact Studies
A. G. W. Cameron
  1108

Dielectric Properties of Venus: Results from Emissivity Modeling and Terrestrial Field Measurements
B. A. Campbell
  1109

Multiple-Wavelength Lunar Radar Images: Analsyis of Regolith Properties
B. A. Campbell, B. R. Hawke
  1110

Siderophile Trace Elements in Silicate Melts: Significance and Status of Unusual Oxidation States
C. J. Capobianco, J. A. Dearo, M. J. Drake, V. J. Hillgren
  1111

Low-Temperature Cooling Histories of Vigarano CAIs: Constraints from Compositions of Metal Particles
I. Casanova, L. Grossman
  1112

Impact Craters on Mars: The Relative Roles of Atmospheric and Subsurface Volatiles
J. Cave, J. Guest, N. Barlow
  1113

Impact Crater Morphology on Martian Volcanoes
J. Cave, J. Guest, B. J. Moore, J. Carroll, N. Barlow
  1114

Evidence for Episodic Tectonic Construction of Ovda Regio, Venus
D. J. Chadwick, G. G. Schaber
  1115

Refined Volcanic and Tectonic History of the Valles Marineris, Mars
D. J. Chadwick, G. J. Leonard, K. L. Tanaka
  1116

Wax Modeling of Thermal Erosion in Low-Viscosity Lava Flows
D. Challis, S. Williams, R. Greeley
  1117

Lunar mineral feedstocks from rocks and soils: X-ray digital imaging in resource evaluation
J. G. Chambers, A. Patchen, L. A. Taylor, S. J. Higgins, D. S. McKay
  1118

First Galileo image of asteroid 243 Ida
C. R. Chapman, M. J. S. Belton, J. Veverka, G. Neukum, J. Head, R. Greeley, K. Klaasen, D. Morrison
  1119

3-D Perspective Imaging: A Tool for Geologic Mapping of Venus
M. G. Chapman, R. L. Kirk, J. M. Barrett
  1120

Subpixel Resolution from Multiple Images
P. Cheeseman, B. Kanefsky, J. Stutz, R. Kraft
  1121

Hypervelocity Impacts and the Magnetism of Small Bodies in the Solar System
G. Chen, T. J. Ahrens, R. Hide
  1122

The Abundance of Thallium and Premordial Lead in Selected Meteorites-The Search for 205Pb
J. H. Chen, G. J. Wasserburg
  1123

The Orbital Evolution of Ordinary Chondrites Over the Last 50 Million Years
Y. Chen, P. H. Benoit, D. W. G. Sears
  1124

Exploration of the Morphological Distribution of the Spectral Units in the Gruithuisen Domes Region
S. D. Chevrel, P. C. Pinet, J. W. Head
  1125

Determination of Nanogram Amounts of C60 by High Pressure Liquid Chromatography
L. P. F. Chibante, W. S. Wolbach, D. Heymann
  1126

MORO: A European Moon Orbiting Observatory
A. F. Chicarro, G. D. Racca
  1127

Formation of IAB-IICD Iron Meteorites
B.-G. Choi, J. T. Wasson
  1128

Thermal-Infrared Multi-Spectral Observations of Mars
P. R. Christensen
  1129

Grain rims on ilmenite in the lunar regolith: Comparison to vapor deposits on regolith silicates
R. Christoffersen, D. S. McKay, L. P. Keller
  1130

Block distributions on the lunar surface: A comparison between measurements obtained from surface and orbital photography
M. J. Cintala, K. M. McBride
  1131

Acid Waters as Agents of Change on a Cold Early Mars
B. C. Clark
  1132

Infrared Spectral Observations of Smaller (50 km) Main Belt S, K, and M Type Asteroids
B. E. Clark, J. F. Bell, D. J. O'Connor, F. P. Fanale
  1133

Remote geochemical experiment package for Discovery class missions
P. E. Clark, L. G. Evans, J. I. Trombka
  1134

Oxygen Isotopes in Kaidun
R. N. Clayton, T. K. Mayeda, A. V. Ivanov, G. J. MacPherson
  1135

The Role of Low Temperature Hydrothermal Convection in the Physical and Chemical Evolution of the Martian Crust and Groundwater
S. M. Clifford
  1136

An X-Ray Diffraction and Reflectance Spectroscopy Study of Iron Sulphides
E. A. Cloutis, M. J. Gaffey
  1137

Minimum Discharge Rates Required for Sustained Water Flow on the Martian Surface
G. D. Clow
  1138

Triton's Lineaments: Complex Morphology and Stress Patterns
G. Collins, P. Schenk
  1139

On the possible role of elemental carbon in the formation of reduced chondrules
H. C. Connolly Jr., R. H. Hewins, R. D. Ash, G. E. Lofgren, B. Zanda
  1140

Astronomy Laboratory Exercise Based on SkyGlobeTM
M. Connors
  1141

Return of an Earth-Grazing Asteroid
M. Connors
  1142

Has the Tidal Bulge on Ariel Shifted in Longitude?
G. Consolmagno, D. M. Davis, P. Nyffenegger
  1143

Unusual Concentrations of Rampart Craters at the Mouths of Outflow Channels, Mars
F. Costard
  1144

Affinity and Petrogenesis of a Unique Vitrophyric Olivine-Augite Mare Basalt from the Apollo 15 Coarse Fines
T. C. Cox, G. Ryder
  1145

Geologic History of Isidis Planitia and Syrtis Major Planum, Mars
R. A. Craddock
  1146

The Origin of PHOBOS and Deimos
R. A. Craddock
  1147

The Influence of Body Shape on the Deformation and Breakup of Comet Shoemaker-Levy 9 Fragments as They Enter the Jovian Atmosphere
D. A. Crawford, T. G. Trucano, M. B. Boslough, M. E. Kipp, J. M. McGlaun
  1148

Palimpsests on Ganymede: an Endogenic Origin?
S. K. Croft
  1149

Post-Impact Hydrothermal Systems: Manson Impact Structure, Manson, Iowa
L. J. Crossey, A. M. Kudo, P. McCarville
  1150

Geology of the Guinevere Planitia Quadrangle of Venus
D. A. Crown, E. R. Stofan, J. J. Plaut
  1151

The Distribution of Hot Spots and Its Relation to Global Geology: Venus, Earth, and Mars
L. S. Crumpler
  1152

Calderas on Mars: Classification, Characteristics, and Processes Related to Mechanisms of Formation
L. S. Crumpler, J. W. Head, J. C. Aubele
  1153

What initiated planetesimal formation?
J. N. Cuzzi, A. R. Dobrovolskis, R. C. Hogan
  1154

NMR Spectroscopy of Experimentally Shocked Coconino Sandstone and the Effect of Pore Water
R. T. Cygan, M. B. Boslough, R. J. Kirkpatrick
  1155

The Planetary Data System Educational CD-ROM Demonstration
M. A. Dale-Bannister
  1156

High-Resolution Transmission Electron Microscopy Study of Meteoritic and Terrestrial Nano-Diamond Microstructures
T. L. Daulton, D. D. Eisenhour, R. S. Lewis, T. J. Bernatowicz
  1157

Alteration of Allende Type B1 CAIs: When, Where, and How
A. M. Davis, S. B. Simon, L. Grossman
  1158

Morphometries and Possible Terrestrial Analogs of Small Martian Volcanoes
P. A. Davis, K. L. Tanaka
  1159

The occurrence of blue luminescing enstatite in E3 and E4 chondrites
J. M. Dehart, G. E. Lofgren
  1160

Ponding and Lacustrine Deposition in Lower Mangala Valles, Mars
R. A. de Hon
  1161

An Oxygen Fugacity Grid for Nebular and Planetary Geochemistry
J. S. Delaney, S. R. Sutton, S. Bajt
  1162

Abundance and Diffusivity of Sulfur in Lunar Picritic Magmas
J. W. Delano, B. Z. Hanson, W. B. Watson
  1163

The fretted terrain of the Nilosyrtis Mensae region of Mars: Clues to the timing of dichotomy formation and the emplacement of the northern plains
J. E. Detroye, S. H. Williams
  1164

High-Temperature Vaporization of Olivine and Serpentine
Yu. P. Dikov, O. I. Yakovlev, M. V. Gerasimov, F. Wlotzka
  1165

Geologic History of the Thaumasia Region of Mars
J. M. Dohm, K. L. Tanaka
  1166

Magnetic Field in the Protosun and Protostars Vicinities
A. Z. Dolginov
  1167

Soil Texture at the Lunar Surface: Regional Analysis with Polarimetric Images
A. Dollfus
  1168

The Role of Hapke's Bidirectional Surface Reflection Model in Determining Atmospheric Abundances at Mercury
D. L. Domingue, A. L. Sprague, D. M. Hunten
  1169

A Search for Further Concentrations of Organic Materials in EET A 79001
C. Douglas, I. P. Wright, C. T. Pillinger, M. M. Grady
  1170

Found: Star and Linear Dunes on Mars
K. S. Edgett, D. G. Blumberg
  1171

Suggestions for Interaction Between Scientists, K - 12 Students and Educators: Mars Education Program in Arizona
K. S. Edgett, P. R. Christensen, S. Schmidt
  1172

Heating by Light and the Size Distribution of Chondrules
D. D. Eisenhour, T. L. Daulton, P. R. Buseck
  1173

Carrier Phases of Isotopically Anomalous Nitrogen in Acapulco Metal: C- and N-Isotopic Compositions Vary with Graphite Morphology
A. El Goresy, E. Zinner, K. Marti
  1174

Carbonates in the CI-Chondrite Ivuna: Implications for Aqueous Alteration Processes on the CI-Parent Body
M. Endress, A. Bischoff
  1175

Apollo 16 Lunar Glasses: Normative Composition and Origin
W. V. Engelhardt
  1176

Gamma Ray Spectra from the Mars Observer Gamma Ray Spectrometer: Cruise Data Analysis
P. A. J. Englert, N. Chakravarty, O. Ivanova, E. A. Beck, J. Brückner, S. H. Bailey, F. C. McCloskey, W. V. Boynton
  1177

C/O Atomic Ratios in Antarctic Micrometeorites: A Progress Report
C. Engrand, M. Perreau, M. Maurette
  1178

Effects of Aerosols Scattering on Spectral Characterization of the Martian Surface
S. Erard
  1179

Projectile Shape and Velocity: Impact on Ejecta Distribution and Composition
N. J. Evans, T. J. Ahrens
  1180

Theoretical Analysis of the Explosive Emplacement of Basaltic Magma in Lava Fountain Eruptions: Implications for Pyroclast Dispersal on Earth, Venus and Mars
S. A. Fagents, L. Wilson
  1181

MG and TI Isotopic Compositions of CAI's from the Unusual Chondrite ACFER 214
A. Fahey, F. Wlotzka
  1182

Will the Real Asteroid Size Distribution Please Step Forward
P. Farinella, D. R. Davis
  1183

Exopaleontology and the search for a fossil record on Mars
J. D. Farmer, D. J. Desmarais
  1184

Diaplectic Transformation in Clinopyroxene (Puchezh-Katunky Astrobleme, Russia)
V. Feldman, S. Kotelnickov, L. Sazonova, E. Guseva
  1185

Modeling the Space Weathering-Induced Optical Alteration of Lunar Soils: First Results
E. M. Fischer, C. M. Pieters, S. F. Pratt
  1186

Grain-Size Fractions of SiC in Murchison ARR: A Method for the Analysis of Carbon and its Isotopes by Stepped Combustion
A. V. Fisenko, A. B. Verchovsky, L. F. Semjenova, J. W. Arden, C. T. Pillinger
  1187

Isotopic and Elemental Fractionations Produced During Evaporation of the Allende Carbonaceous Chondrite
C. Floss, A. El Goresy, G. Kransel, W. Rammensee, H. Palme, E. Zinner
  1188

Narrow-Field Imaging of the Lunar Sodium Exosphere
B. Flynn, S. A. Stern
  1189

Does the Kuiper Belt Contribute Significantly to the Zodiacal Cloud and the Stratospheric Interplanetary Dust?
G. J. Flynn
  1190

Hydrated Interplanetary Dust Particles: Element Abundances, Mineralogies, and Possible Relationships to Anhydrous IDPs
G. J. Flynn, S. R. Sutton, S. Bajt, W. Klöck, K. L. Thomas, L. P. Keller
  1191

Nitrogen Solubility in Aubrite and E Chondrite Melts
R. A. Fogel
  1192

SIMS Analysis of Orthopyroxene in Diogenites: an Attempt to Define a Fractionation Sequence
G. W. Fowler, J. J. Papike, C. K. Shearer
  1193

Impact basins in Southern Daedalia, Mars: Evidence for clustered impactors?
H. Frey, J. H. Roark
  1194

Effects due to overlapping large impact basins on Mars
H. Frey, A. M. Reidy, J. H. Roark, S. Stockman
  1195

Constraints on the Physical Details of Nakhlite Formation
R. C. Friedman, T. J. McCoy, G. J. Taylor
  1196

Estimating Surface Roughness: Evaluation of an Empirical Backscatter Model
L. Gaddis
  1197

Spectral Unit Map of the Moon with Improved Galileo SSI Mosaics
L. Gaddis, A. McEwen, T. Becker
  1198

Influence of Variable Oxygen and Sulfur Fugacity on Partitioning of Ni, CU and CR Among Olivine, Silicate Melt and Sulfide Melt
G. A. Gaetani, T. L. Grove
  1199

Nature and Origins of the Olivine-Dominated A- and S(I)-type Asteroids
M. J. Gaffey
  1200

Interstellar Graphite in Tieschitz
X. Gao, C. Alexander, P. Swan, R. Walker
  1201

Solar proton produced neon in shergottite meteorites
D. H. Garrison, M. N. Rao, D. D. Bogard
  1202

Quantifying shapes of volcanoes on Venus
J. B. Garvin
  1203

Mesoscale roughness of Venus
J. B. Garvin, J. J. Frawley
  1204

Volcano morphometry and volume scaling on Venus
J. B. Garvin, R. S. Williams Jr.
  1205

Ida: Distribution and Origin of Surface Blocks
P. Geissler, J.-M. Petit, R. Greenberg
  1206

High-Temperature Vaporization of Gypsum and Anhydrites: Experimental Results
M. V. Gerasimov, Yu. P. Dikov, O. I. Yakovlev, F. Wlotzka
  1207

Trapping of Carbon Dioxide from a Hot Atmosphere by Condensing Silicates
M. V. Gerasimov, Yu. P. Dikov, O. I. Yakovlev, F. Wlotzka
  1208

Preliminary Analysis of Associations of Small Volcanic Edifices with Major Geologic Features by Latitude on the Surface of Venus
K. Gerlach, M. Safford, G. Komatsu, J. Johnson, J. Lockwood, M. Ellison
  1209

Morphological Mapping of Two Distinct Corona Chains
R. C. Ghail
  1210

Plate Tectonics, Venusian Style
R. C. Ghail, L. Wilson
  1211

A Reappraisal of Metamorphism in the Vredefort Dome, South Africa, and Its Implications for the Origin and Evolution of the Dome
R. L. Gibson, W. U. Reimold, Th. Wallmach, W. P. Collison
  1212

Intratessera Volcanism of Alpha and Tellus Tesserae on Venus
M. S. Gilmore, J. W. Head III
  1213

Composition and Petrography of a Muong Nong-type Georgia Tektite
B. P. Glass, C. Koeberl, H. Povenmire
  1214

A Theoretical Study of SO2 Transport by Explosive Volcanism on Venus
L. S. Glaze
  1215

Hot Belts of Venus and the Early Earth
M. Z. Glukhovsky, V. M. Moralev
  1216

The Linear Polarization of Light Scattered from Icy Satellite Surfaces: The Diagnostic Potential of Galileo PPR Measurements
J. D. Goguen
  1217

Application of an alkylammonium method for characterization of phyllosilicates in CI chondrites
D. C. Golden, D. W. Ming, M. E. Zolensky, S. V. Yang
  1218

High Resolution Transmission Electron Microscopy (HRTEM) of Nanophase Ferric Oxides
D. C. Golden, R. V. Morris, D. W. Ming, H. V. Lauer Jr.
  1219

Structure and Rheology of Partially Molten Ammonia-Water Ices
D. L. Goldsby, D. L. Kohlstedt
  1220

Constraints on the Largest Marsquake
M. P. Golombek
  1221

Extension Across Tempe Terra and Sirenum Provinces on Mars from Measurements of Fault Scarp Widths
M. P. Golombek, K. L. Tanaka, D. J. Chadwick, B. J. Franklin, P. A. Davis
  1222

"Flindersite" Bearing Impact Ejecta Layer from South Australia
V. A. Gostin, M. Zbik
  1223

"Flindersites", Distant Ejecta Impactites from South Australia
V. A. Gostin, M. Zbik
  1224

Diamonds from ACFER 182: Morphology, C and N Stable Isotopic Composition and Cathodoluminescence Properties
M. M. Grady, M. R. Lee, C. M. O'd. Alexander, J. W. Arden, C. T. Pillinger
  1225

A Search for Nitrates in Nakhla
M. M. Grady, I. P. Wright, C. T. Pillinger
  1226

A Galileo Multi-Instrument Spectral Analysis of 951 Gaspra
J. C. Granahan, F. P. Fanale, M. S. Robinson, R. W. Carlson, L. W. Kamp, K. P. Klaasen, P. R. Weissman, M. Belton, D. Cook, K. Edwards, A. S. McEwen, L. A. Soderblom, B. T. Carcich, P. Helfenstein, D. Simonelli, P. C. Thomas, J. Veverka
  1227

Ganymede and Callisto Spectral Data Cubes
J. C. Granahan, K. Polk, F. P. Fanale
  1228

Early Fluvial Degradation in Terra Tyrrhena, Mars: Constraints from Styles of Crater Degradation on the Earth
J. A. Grant, P. H. Schultz
  1229

Erosion of Ejecta at Meteor Crater, Arizona: Further Constraints from Ground Penetrating Radar
J. A. Grant, P. H. Schultz
  1230

Solar UV Photon Interaction with the Surface of Mars
R. Grard
  1231

The Carson Quadrangle, Venus
R. Greeley, K. Bender, D. Senske, J. Guest
  1232

Do Lava Flows Erode? Preliminary Assessment
R. Greeley, R. S. Harris, S. D. Kadel, D. A. Williams, J. E. Guest
  1233

Dust on Mars: New Values for Wind Threshold
R. Greeley, M. Lacchia, B. White, R. Leach, D. Trilling, J. Pollack
  1234

Morphology and Geology of Asteroid Ida: Preliminary Galileo Imaging Observations
R. Greeley, R. Sullivan, R. Pappalardo, J. Head, J. Veverka, P. Thomas, P. Lee, M. Belton, C. Chapman
  1235

Constraints on Flash Heating from Melting Kinetics
J. P. Greenwood, P. C. Hess
  1236

Ratio of First and Second Generation Fold Wavelengths on Lavas May Indicate Flow Composition
T. K. P. Gregg, J. H. Fink
  1237

40Ar/39Ar Dating of Samples from the Cat Mountain Meteorite
J. A. Grier, T. D. Swindle, D. A. Kring
  1238

The Sudbury Structure: Additional Constraints on Its Origin and Evolution
R. A. F. Grieve, A. Deutsch
  1239

Wanapitei Impact Structure: Reconstruction of the Event
R. A. F. Grieve, T. Ber
  1240

Mars-It's What's Inside That Counts
L. L. Griffith, R. E. Arvidson
  1241

Proposal for a Topographic Survey of Gusev Crater
E. A. Grin, N. A. Cabrol, G. Dawidowicz
  1242

Dike Emplacement at Zones of Neutral Buoyancy on Venus
E. B. Grosfils, J. W. Head
  1243

Modes of Origin for Giant Radiating Lineament Systems on Venus
E. B. Grosfils, J. W. Head
  1244

Radial Lineament Systems on Venus: Constraining Models of Global Stress
E. B. Grosfils, J. W. Head
  1245

A Possible Atmospheric Water Source for the Fluvial Valleys on Alba Patera
V. C. Gulick, C. P. McKay
  1246

Ferrosilicate, Fayalite and Magnesioferrite Formation by Isothermal Annealing of an Iron-contaminated Mg-SiO Smoke
F. Guofei, F. J. M. Rietmeijer
  1247

Meteoritic Constraints on the 500 MA Disruption of the L Chondrite Parent Body
H. Haack, K. Keil, E. R. D. Scott, M. D. Norman, P. Farinella
  1248

X-Ray Diffraction Line Broadening in Experimentally Shocked Orthopyroxenes
K. Hackbarth, A. Deutsch, D. Stöffler
  1249

Restoration of a Planetary Gamma-Ray Data Map
E. L. Haines, R. G. Radocinski, C. L. Lawson, A. E. Metzger
  1250

The Geology and Evolution of Hecate Chasma, Venus
V. E. Hamilton, E. R. Stofan
  1251

Are There Correlations Between Emissivity, Topography, and Age at Coronae on Venus?
V. E. Hamilton, P. R. Christensen, E. R. Stofan
  1252

Electron Microprobe Analyses of Low Vanadium Basalt Glasses
B. Hanson, J. W. Delano
  1253

The Refractive Index of the Regolith of Mercury
B. Hapke
  1254

Investigations of the 182Hf-182W Systematics
C. L. Harper Jr., S. B. Jacobsen
  1255

Martian Atmospheric Interaction with Bolides: A Test for an Ancient Dense Martian Atmosphere
W. K. Hartmann, S. Engel
  1256

Melt Inclusions in PAT91501: Evidence for Crystallization from an L-Chondrite Impact Melt
R. P. Harvey, E. Roedder
  1257

Spectral and Radar Studies of the Schiller-Schickard Region of the Moon
B. R. Hawke, D. T. Blewett, B. A. Campbell
  1258

Atmospheric effects on the mapping of Martian thermal inertia and thermally derived albedo
J. N. Hayashi, B. M. Jakosky, R. M. Haberle
  1259

Effects of Fine Particles (<25 μm) on Reflectance Spectra from 0. 3 to 25 μm
J. E. Hays, J. F. Mustard
  1260

Large Igneous Provinces: A Planetary Perspective
J. W. Head III
  1261

Lunar Mare Deposits: Mechanisms of Emplacement, Stratigraphy, and Implications for the Nature and Evolution of Source Regions and Secondary Crusts
J. W. Head
  1262

NOAH: A Program to Visualize Lava Flooding of the Venus Crust
J. W. Head, P. Haggerty
  1263

Mars: Formation and Evolution of Magma Reservoirs
J. W. Head, L. Wilson
  1264

Geology of the Lavinia Planitia Area, Venus
J. Head, K. Magee, S. Keddie, M. Gilmore, A. Yingst
  1265

Kawelu Planitia, Venus: Geology and Mechanisms for the Formation of a Major Volcanic Region
M. B. Helgerud, D. Senske
  1266

New Laboratory Measurements of Mid-IR Emission Spectra of Simulated Remote Planetary Surfaces
B. G. Henderson, P. G. Lucey, B. M. Jakosky
  1267

Geologic Map of the MTM-85280 Quadrangle, Mars
K. E. Herkenhoff
  1268

Gravity Analysis of Impact Basins at Spacecraft Altitudes: Lessons from Chicxulub
R. R. Herrick, V. L. Sharpton
  1269

26Al, 10Be, and MG Isotopes in the Grant Iron Meteorite
G. F. Herzog, A. E. Souzis, S. Xue, J. Klein, R. Middleton
  1270

Overturn of Magma Ocean Ilmenite Cumulate Layer (II): Implications for Lunar Thermal and Magmatic Evolution
P. C. Hess, E. M. Parmentier
  1271

Possible Origin of Si-bearing Metal in Chondrites
R. H. Hewins, B. Zanda, H. C. Connolly Jr., M. Bourot-Denise
  1272

Search for Extractable Fullerenes in Clays from K/T Boundaries of New Zealand
D. Heymann, L. P. F. Chibante, W. S. Wolbach, R. E. Smalley
  1273

Petrographic characterization of lunar soils: Application of X ray digital-imaging to quantitative and automated analysis
S. J. Higgins, A. Patchen, J. G. Chambers, L. A. Taylor, D. S. McKay
  1274

Tektites Found in the Ruins of the Maya City of Tikal, Guatemala
A. R. Hildebrand, H. Moholy-Nagy, C. Koeberl, L. May, F. Senftle, A. N. Thorpe, P. E. Smith, D. York
  1275

High Pressure and Temperature Metal-Silicate Partitioning Behavior of Moderately Siderophile Elements: Implications for the Early History of the Earth
V. J. Hillgren, M. J. Drake, D. C. Rubie
  1276

Possible spinel absorption bands in S-asteroid visible reflectance spectra
T. Hiroi, F. Vilas, J. M. Sunshine
  1277

The Ammonia-Water Phase Diagram and Phase Volumes to 4 Kbars
D. L. Hogenboom, J. S. Kargel, T. C. Holden, J. Ganasan
  1278

An Experimental Study of KREEP Basalt Evolution
B. Holmberg, M. J. Rutherford
  1279

Recipes for Impact Cratering
K. A. Holsapple
  1280

Galileo Magnetic Field Signature: No Evidence That Gaspra is Differentiated
L. L. Hood, C. P. Sonett
  1281

Evidence for an Interstellar Nitride Grain with Highly Anomalous Isotopic Compositions of C, N and SI
P. Hoppe, R. Strebel, P. Eberhardt, S. Amari, R. S. Lewis
  1282

Shocked materials from the Dutch Peak diamictite, Utah
F. Hoerz, T. E. Bunch, V. R. Oberbeck
  1283

Experimental impacts into Teflon targets and LDEF thermal blankets
F. Hoerz, M. J. Cintala, M. E. Zolensky, R. P. Bernhard, T. H. See
  1284

Simulation of Gravity-dominated Collisions
K. Housen
  1285

On the Formation of Enstatite in Unequilibrated Enstatite Chondrites
W. Hsu, G. Crozaz
  1286

Group A5 Chondrules in Ordinary Chondrites: Their Formation and Metamorphism
S. Huang, P. H. Benoit, D. W. G. Sears
  1287

NIMS Science Objectives and Observational Plans for Ganymede During the Galileo Tour
J. Hui, H. H. Kieffer, The NIMS Team
  1288

Characterization of Lava-Flow Surface Textures in Different Eruptive Environments on Venus
L. K. Hultgrien, L. R. Gaddis
  1289

The Non-Terrestrial Origin of the Moon
M. Humayun, R. N. Clayton
  1290

Potassium Isotopic Composition of Some Australasian Tektites
M. Humayun, R. N. Clayton, C. Koeberl
  1291

Presolar Al2O3 with a Large Excess of 17O and Depleted 18O
G. R. Huss, A. J. Fahey, R. Gallino, G. J. Wasserburg
  1292

Silicon Carbide in Unequilibrated Ordinary Chondrites
G. R. Huss, A. J. Fahey, G. J. Wasserburg
  1293

A Search for 26Al in Chondrites: Chondrule Formation Time Scales
I. D. Hutcheon, G. R. Huss, G. J. Wasserburg
  1294

Grain Charging and Plasma Potentials in a Dusty Plasma with a Dust Grain Size Distribution
T. W. Hyde, L. A. Bringol
  1295

Extended Grain Lattice Formation Within a Dusty Plasma
T. W. Hyde, W. M. Richter
  1296

Dynamics of Two Interacting Objects Orbiting the Sun
S. I. Ipatov
  1297

New Phosphides in the Kaidun Meteorite
A. V. Ivanov, M. E. Zolensky, G. J. MacPherson, S. V. Yang, N. N. Kononkova
  1298

Dynamic Fragmentation of a Comet in the Jovian Atmosphere
B. A. Ivanov, H. J. Melosh
  1299

Dynamics of Fluidized Ejecta Blankets on Mars
B. A. Ivanov, B. C. Murray, A. S. Yen
  1300

Induced Thermoluminescence Study of Experimentally Shock-loaded Quartz
A. I. Ivliev, L. L. Kashkarov, D. D. Badjukov
  1301

Shock-Thermal History of Erevan Howardite Matter on Data of Thermoluminescence Analysis of Silicate Minerals
A. I. Ivliev, L. L. Kashkarov, Yu. Yu. Korotkova
  1302

Relationships Among Radar Backscatter, Microwave Emissivity, Altitude, and Geology in Ovda Regio, Venus
N. R. Izenberg, R. E. Arvidson
  1303

Size and Distribution of Shocked Mineral Grains in the Pierre Shale (Late Cretaceous) of South Dakota Related to the Manson, Iowa, Impact Event
G. A. Izett, W. A. Cobban
  1304

Dust evolution from comets and asteroids: Their velocities at Earth orbit intersection
A. A. Jackson, H. A. Zook
  1305

New Sulfur Isotopic Measurements of Meteorites and Possible Nebular Relations
T. Jackson, S. G. Bobias, M. H. Thiemens
  1306

Dating the Giant Moon-forming Impact with 146Sm-147Nd Systematics
S. B. Jacobsen, C. L. Harper Jr.
  1307

Mars atmospheric escape and isotopic fractionation: Synthesis of data and models
B. M. Jakosky, J. G. Luhmann, J. H. Jones
  1308

Siderophile and Volatile Elements in Apollo 17 Impact Melt Rocks
O. B. James
  1309

Life Cycle of Venusian Coronae
D. M. Janes, S. W. Squyres
  1310

The Structural Changes of Water Ice I During Warmup
P. Jenniskens, D. F. Blake
  1311

Buoyant Mantle Flow and Rift Associated Volcanism: Application to Venus
K. Jha, E. M. Parmentier
  1312

Resolution Analysis of Magellan Cycle 5 Gravity Data
C. L. Johnson, D. T. Sandwell
  1313

Backscatter Cross Sections of Venusian FEB Crater Deposits
J. R. Johnson, V. R. Baker
  1314

Longitudinal Surface Property Variations Along Venusian FEB Flows: Isabella
J. R. Johnson, V. R. Baker
  1315

Preliminary Geologic Mapping of Venus Quadrangle V59 (Barrymore)
J. R. Johnson, G. Komatsu, V. R. Baker
  1316

Searching for Rare Highland Igneous Rocks at Apollo 14: Fragments of Magnesian-Suite Assemblages
B. L. Jolliff
  1317

Evidence for the Nature of the Igneous Percursor of Ferroan Plutonic Rocks from North Ray Crater, Apollo 16
B. L. Jolliff, L. A. Haskin
  1318

Sampling the Apollo 17 Highlands Using Soils and Lithic Fragments
B. L. Jolliff, K. M. Rockow, R. L. Korotev, L. A. Haskin
  1319

The Compositional Similarity Between Sioux County and Experimentally Produced Partial Melts of the Murchison Chondrite Favors a Partial Melting Origin for Primitive Eucrites
J. H. Jones, B. Z. Hanson, G. A. McKay, A. J. G. Jurewicz, J. W. Delano, D. W. Mittlefehldt
  1320

Reduced, Plagioclase-rich Chondrules in the Lancé and Kainsaz CO3 Chondrites
R. H. Jones, A. J. Brearley
  1321

An Additional Alba Patera Structure in Tempe Terra, Mars?
H.-P. Jons
  1322

Textural constraints on the formation of alteration phases in CM chondrites
L. H. Joseph, L. B. Browning, M. E. Zolensky
  1323

14C Terrestrial Ages of Achondrites from Victoria Land, Antarctica
A. J. T. Jull, E. Cielaszyk, S. T. Brown, D. J. Donahue
  1324

Evidence for an Implanted Solar Component of 14C in Lunar Samples
A. J. T. Jull, D. Lal, D. J. Donahue
  1325

Partial melting of the St. Severin (LL) and Lost City (H) ordinary chondrites: One step backwards and two steps forward
A. J. G. Jurewicz, J. H. Jones, D. W. Mittlefehldt
  1326

Preliminary results of sulfide melt/silicate wetting experiments in a partially melted ordinary chondrite
S. R. Jurewicz, J. H. Jones
  1327

Radar Imaging of "Overspread" Bodies Using Coherent Frequency Hopping
R. Jurgens, L. Robinett, M. Slade, D. Strobert, B. Flores
  1328

The Effect of Oxygen Fugacity on the Partitioning of Nickel and Cobalt Between Melt and Metal
A. A. Kadik
  1329

The CO2 Formation in Terrestrial Magmas During the Fluid-Absent Melting of Carbon-bearing Rocks
A. A. Kadik, S. N. Shilobreeva
  1330

Compositional Similarities Between Undergrouped Loongana 001 and CV4 Coolidge
G. W. Kallemeyn
  1331

Geochemistry of LEW88774 and Two Other Unusual Ureilites
G. W. Kallemeyn, P. H. Warren
  1332

Isotopic, Chemical and Textural Properties of Acid Residues from Various Meteorites
N. Kano, K. Yamakoshi, H. Matsuzaki
  1333

An Alluvial Depositional Analog for Some Volcanic Plains on Venus
J. S. Kargel
  1334

Cosmic-Ray Exposure History of the Erevan Howardite Matter by Track Data
L. L. Kashkarov, N. N. Korotkova
  1335

Some General Characteristics of the Early Radiation-Thermal History of Carbonaceous and Ordinary Chondrite Matter on Data of Track Studies
L. L. Kashkarov, N. N. Korotkova, G. V. Kalinina
  1336

Structural Characteristics and Classification of Double-Type Coronae and Corona-like Features on Venus
K. Kauhanen, T. Törmänen
  1337

Dione Regio Venus: A Comparison to Other Regional Highlands
S. T. Keddie, J. W. Head
  1338

The Geology and Stratigraphy of Dione Regio, Venus
S. T. Keddie, J. W. Head
  1339

Sapas Mons: Evolution of a Type-Shield Volcano on Venus
S. T. Keddie, J. W. Head
  1340

Structural Evolution of Danu Montes, Venus: Deformation Around a Curved Boundary
M. Keep, V. L. Hansen
  1341

Xenon Isotopic Measurements in Shallowater: In Situ Pulsed Laser Volatilization and the Search for the Carrier of Radiogenic 129Xe
K. Kehm, C. M. Hohenberg, R. H. Nichols Jr.
  1342

The nature of agglutinitic glass in the fine-size fraction of lunar soil 10084
L. P. Keller, D. S. McKay
  1343

Electron energy-loss spectroscopy of carbon in interplanetary dust particles
L. P. Keller, J. P. Bradley, K. L. Thomas, D. S. McKay
  1344

Compositional Evidence in Favor of a Genetic Link Between the NYSA and Hertha Asteroid Families
M. S. Kelley, M. J. Gaffey, J. G. Williams
  1345

Modelling Lava Flow Cooling Using a Finite-Difference Numerical Approximation
R. M. Kent, H. Pinkerton
  1346

Modelling the Flow and Heat Transfer of Magma in Dikes Using Computational Fluid Dynamics
R. M. Kent, H. Pinkerton
  1347

Production of Superparamagnetic Fe0 on the Lunar Surface
J. F. Kerridge
  1348

Formation of Venusian Crustal Plateaus Over Mantle Downwellings
J. G. Kidder, R. J. Phillips
  1349

Mantle Plumes on Venus: New High Rayleigh Number Models and Applications to Magellan Observations
W. S. Kiefer
  1350

Isolation of Cosmic-Ray-produced Nitrogen in Meteoritic Silicates and Some Implications
J. S. Kim, Y. Kim, K. Marti
  1351

Genetic Relationship of Acapulcoites and Lodranites? A Study of Nitrogen and Xenon Isotopic Signatures
Y. Kim, K. Marti
  1352

Splotches on Venus: Distribution, Properties, and Classification
R. L. Kirk, D. J. Chadwick
  1353

57Fe Mössbauer Studies of the Kinetics of Pyrite Decomposition on the Surface of Venus
G. Klingelhöfer, B. Fegley Jr., K. Lodders
  1354

Optimization of the Miniaturized Backscattering Mössbauer-Spectrometer MIMOS
G. Klingelhöfer, P. Held, J. Foh, F. Schlichting, R. Teucher, E. Kankeleit, E. N. Evlanov, O. F. Prilutski, G. V. Veselova, E. A. Duzheva
  1355

Geochemical and Mineralogical Constraints on the Parent Objects of Micrometeorites
W. Klöck, T. Presper
  1356

Heating Experiments Simulating Atmospheric Entry of Micrometeorites
W. Klöck, G. J. Flynn, S. R. Sutton, S. Bajt, K. Neuking
  1357

Wave Tectonics on the Moon and Symmetries-Antisymmetries of Mare Orientale Region
G. G. Kochemasov
  1358

Ni-rich CR Spinels in Spherule Beds from the Barberton Mountain Land (South Africa) are of Terrestrial Origin: Evidence Against Impact Origin of Spherule Layers
C. Koeberl, W. U. Reimold
  1359

Mineralogical, Petrological, and Geochemical Studies of Drill Cores from the Manson Impact Structure: A Progress Report
C. Koeberl, R. R. Anderson, R. H. Boer, J. D. Blum, C. P. Chamberlain, A. Kracher, W. U. Reimold, B. Träxler, A. Vormaier
  1360

AMES Structure, Oklahoma: an Economically Important Impact Crater
C. Koeberl, W. U. Reimold, R. A. Powell
  1361

Magnesium Isotopic Fractionation in the Olivines from Allende Chondrules and Isolated Grains
A. Koga, H. Nagahara, H. Yurimoto, O. Koike
  1362

Al-Mg Isotopic and REE Clues to the Formation of a Type B1 CAI from Allende Meteorite
O. Koike, H. Yurimoto, H. Nagasawa
  1363

Longitudinal Profiles of Plains Channels on Venus
G. Komatsu, V. R. Baker
  1364

Geochemical Comparison of Four Cores from the Manson Impact Structure
R. L. Korotev, K. M. Rockow, B. L. Jolliff, L. A. Haskin
  1365

The Ionized Luminous Column Created During the Flight of a Comet Through Jovian Atmosphere
I. B. Kosarev, I. V. Nemtchinov
  1366

Lunar and Planetary Mission Scenario for H-II Launch Vehicle
H. Koshiishi, R. Kouda, K. Matushima, A. Takano
  1367

Towards Formation of Shells and Rays in Cometary Ionosphere
N. Ya. Kotsarenko, O. P. Verkhoglyadova
  1368

Aspect of Lunar Resources Exploration
R. Kouda, H. Koshiishi
  1369

Mercury: Mid-infrared (7.3 - 13.5 microns) spectroscopic observations showing features characteristic of plagioclase
R. W. H. Kozlowski, A. L. Sprague, F. C. Witteborn, D. P. Cruikshank, D. Wooden, K. D. Snyder
  1370

Fate of Halogens at the Surface of Tektites
U. Krähenbühl, M. Langenauer
  1371

Small Grains with High Lead Concentration in Chainpur
J. L. A. M. Kramer, A. C. Kik, R. D. Vis
  1372

Uniqueness of a solution of a steady state photochemical problem: Applications to Mars
V. A. Krasnopolsky
  1373

H2O-H2SO4 system in Venus' clouds and OCS, CO, and H2SO4 profiles in Venus' troposphere
V. A. Krasnopolsky, J. B. Pollack
  1374

First measurement of helium on Mars: Implications for the problem of radiogenic gases on the terrestrial planets
S. Bowyer, S. Chakrabarti, G. R. Gladstone, J. S. McDonald
  1375

Model for Ascending of Mantle Diapirs Forming Coronae on Venus
M. A. Kreslavsky
  1376

Silica- and Merrihueite/Roedderite-bearing Chondrules and Clasts in Ordinary Chondrites: New Occurrences and Possible Origin
A. N. Krot, J. T. Wasson
  1377

AB Initio Calculations of Thermodynamics and Kinetics of Gas-Phase Reactions Relevant to the Early Solar Nebula
J. D. Kubicki, J. R. Beckett, G. A. Blake, E. M. Stolper
  1378

Isostasy Models and Correlations of Geoid and Topography Data for Characteristic Highlands on Venus
A. B. Kucinskas, D. L. Turcotte
  1379

Mars, A Carbon Rich Planet? Behavior of H and C During Early Core Formation
K. Kuramoto, T. Matsui
  1380

Fractionated Trace Element Abundances in Micrometeorites from Antarctica
G. Kurat, C. Koeberl, M. Maurette
  1381

Preliminary Report on Spinel-rich CAIs in an Antarctic Micrometeorite
G. Kurat, P. Hoppe, M. Maurette
  1382

Non-Steady Modeling of Comet's Wake in the Rarefied Layers of the Jovian Atmosphere
M. Ju. Kuzmitcheva, O. P. Popova
  1383

Volcanism and Tectonism in Rusalka Planitia and Atla Regio, Venus
M. G. Lancaster, J. E. Guest
  1384

Stratigraphic Assessment of Gusev Crater as an Exobiology Landing Site
R. Landheim, N. A. Cabrol, R. Greeley, J. D. Farmer
  1385

Mossbauer and Spectral (Visible and Near-IR) Data for Fe^{3+}-Substituted Rutile
H. V. Lauer Jr., R. V. Morris, R. K. Vempati
  1386

An Experimental Study of Iron Sulfide Kinetics in H2-H2S Gas Mixtures and Application to Iron Sulfide Condensation in the Solar Nebula
D. Lauretta, B. Fegley Jr.
  1387

The Massive O, B Star of Second Generation May be Source of Interstellar Diamond, SiC and Graphite in Chondrites
A. K. Lavrukhina, A. V. Fisenko
  1388

On Forming Mg-26 and Cr-53 Anomalies in Some Meteoritic Minerals
A. K. Lavrukhina, G. K. Ustinova
  1389

Characterizing Errors Using the Spectral Mixture Framework
M. E. Lawler, J. B. Adams
  1390

Impact-Related Low-Emissivity Anomolies on Venus
S. L. Lawson, J. J. Plaut
  1391

Project Artist: Integrating Astronomy and Planetary Sciences Into the Elementary and Middle School Curriculum
L. A. Lebofsky, N. R. Lebofsky
  1392

The Nature of Low Albedo Asteroids from 3-μm Spectrophotometry
L. A. Lebofsky, D. T. Britt, E. S. Howell, A. S. Rivkin
  1393

Mapping Regolith and Blocks on Asteroid 243 Ida: The Effects of Photometric Viewing Geometry
P. Lee, J. Veverka, M. J. S. Belton, P. C. Thomas, B. T. Carcich, R. Greeley, R. Sullivan, R. Pappalardo, The Galileo SSI Team
  1394

Progress in the development of the GMM-2 gravity field model for Mars
F. G. Lemoine, D. E. Smith, F. J. Lerch, M. T. Zuber, G. B. Patel
  1395

Preliminary solutions for the lunar gravity field from analysis of lunar orbiter tracking data
F. G. Lemoine, D. E. Smith, M. T. Zuber, D. D. Rowlands, S. K. Fricke
  1396

Precision Noble Gas Measurements on Presolar Diamonds from the Murchison Meteorite
R. S. Lewis
  1397

Exploring Meteorite Mysteries: A Teachers' Guide with Activities
M. Lindstrom, J. Allen, A. Treiman, J. Burch, K. Crowell, K. Stocco, B. Swaby, R. Luksch, K. Tobola
  1398

Pigeonholing planetary meteorites: The lessons of misclassification of EET87521 and ALH84001
M. M. Lindstrom, A. H. Treiman, D. W. Mittlefehldt
  1399

Thumbprint Terrain in Isidis Planitia: Formed in a Glacial Paleolake Environment
J. F. Lockwood, J. S. Kargel
  1400

On the origin of enstatite chondrite chondrules based on their petrography and comparison with experimentally produced chondrules
G. E. Lofgren, J. M. Dehart, P. J. Burkett
  1401

Liquidus Equilibria of Lunar Analogs in the Garnet Stability Field
J. Longhi
  1402

A Model for Forecasting Lava Flow Lengths
R. Lopes-Gautier, C. R. J. Kilburn
  1403

Galileo's Near Infrared Mapping Spectrometer (NIMS) Science Objectives and Observational Plans for Io
R. Lopes-Gautier, R. Carlson, W. Smythe, L. Soderblom, The Galileo NIMS Team
  1404

Morphology of meteoroid and space debris craters on LDEF metal targets
S. G. Love, D. E. Brownlee, N. L. King, F. Hoerz
  1405

Scarp Heights of Martian Channels from Shadow Measurements
B. K. Lucchitta, J. Dembosky
  1406

Small Time Differences in Differentiated Meteorites Recorded by the ^{53)Mn-53Cr Chronometer
G. W. Lugmair, C. Maclsaac, A. Shukolyukov
  1407

Terrain Simulator
W. Luo, R. Arvidson, R. Becker
  1408

Dry Deformation of Diabase: Implications for Tectonics on Venus
S. J. Mackwell, M. E. Zimmerman, D. L. Kohlstedt, D. S. Scherber
  1409

Magnetic Properties Experiments Designed for Use with a Mössbauer Spectrometer and an APX Spectrometer on Mars
M. B. Madsen, J. M. Knudsen, S. Faurschou Hviid, H. P. Gunnlaugsson, D. P. Agerkvist, L. Vistisen, J. Madsen, G. Klingelhöfer, E. Kankeleit, V. N. Khromov, E. Evlanov, O. Prilutski, B. Zubkov
  1410

A Model for the Origin of Flood Volcanism and "Passive" Rifting in the Lada Terra-Lavinia Planitia Region on Venus
K. P. Magee, J. W. Head
  1411

Venus: Morphology and Morphometry of Volcanism in Rifting Environments
K. P. Magee, J. W. Head
  1412

Alternative Thermal Histories for Type B Ca-Al-rich Inclusions
S. V. Maharaj, R. H. Hewins
  1413

Radial Compaction of the Dust Subdisk in a Protoplanetary Disk as a Possible Way to Gravitational Instability
A. B. Makalkin
  1414

Numerical Simulation of Tidal Capture of a Lunar-Mass Planetoid by an Earth-like Planet: Two-Dimensional Limits of a Prograde Stable Capture Zone
R. J. Malcuit, R. R. Winters
  1415

Extreme Potassium Enrichment in Plagioclase from Lithic Clasts in the Lewis Cliff 86001 Monomict Eucrite
J. L. Mann, J. S. Delaney
  1416

Geologic Mapping of the Sif Mons Southern Flank, Venus (Preliminary Results)
A. G. Marchenko
  1417

Apollo- The Next Generation: Activities to Accompany the Lunar Sample Disk
L. Martel, G. J. Taylor
  1418

Evidence for a Mineralogical Change in Relation with the Martian Global Geomorphic Dichotomy in the Tharsis-Mare Sirenum Region
P. Martin, P. C. Pinet, R. Bacon, A. Rousset
  1419

Experimental and Theoretical Investigation of Shock Induced Outgassing of Dolomite
I. Martinez, U. Schörer, F. Guyot, A. Deutsch, U. Hornemann
  1420

Trojan Collisional Families as a Source for Short-Period Comets
F. Marzari, V. Vanzani, P. Farinella
  1421

Effects of Meteoroid Shape on Cosmogenic-Nuclide Production Rates
J. Masarik, R. C. Reedy
  1422

Numerical Simulations of Gamma-Ray Emission from the Martian Surface
J. Masarik, R. C. Reedy
  1423

The Highbury Structure, A New Impact Crater in N. W. Zimbabwe
S. Master, W. U. Reimold, D. Brandt, C. Koeberl, D. Robertson, L. A. G. Antoine
  1424

I-Xe Dating of EL Taco Inclusions
K. J. Mathew, F. Begemann
  1425

Production Rate of Nitrogen in Moon and Meteorites
K. J. Mathew, S. V. S. Murty
  1426

Cosmogenic 26Al in Deep-Sea Stony Spherules
H. Matsuzaki, K. Yamakoshi
  1427

GVDR Data Product: A Summary of All Magellan Observations of Venus Surface Characteristics
M. J. Maurer, R. A. Simpson
  1428

Erosion and Deposition in the Martian Highlands: Aeolis and Arabia
T. A. Maxwell, R. A. Craddock
  1429

Depth of Formation of Lunar and Terrestrial Anorthosites and Gabbros from Compositional Profiles of Exsolved Pyroxenes
I. S. McCallum, H. E. O'Brien
  1430

Post-Impact Hydrothermal Alteration of the Manson Impact Structure
P. McCarville, L. J. Crossey
  1431

The Galileo Mission Near Infrared Mapping Spectrometer (NIMS) Investigation of the Galilean Satellites
T. B. McCord, R. Carlson, The NIMS Team
  1432

Low-FeO Ordinary Chondrites: A Nebular Origin and New Chondrite Parent Body
T. J. McCoy, K. Keil, E. R. D. Scott, G. K. Benedix, A. J. Ehlmann, T. K. Mayeda, R. N. Clayton
  1433

Eureca's Hypervelocity Impact Score: Microcrater Flux Decreases But the Large Crater Flux Increases in Specific Directions
J. A. M. McDonnell
  1434

Evidence for Pre-Nectarian Impact Basin in Northwestern Oceanus Procellarum
A. McEwen, P. Davis, A. Howington-Kraus
  1435

Global Color Views of Mars
A. S. McEwen, L. A. Soderblom, T. L. Becker, E. M. Lee, J. D. Swann, R. Aeschliman, R. M. Batson
  1436

V, CR and MN Partition Coefficients Between Mantle Minerals and Silicate Melt
E. A. McFarlane, M. J. Drake, D. C. Rubie
  1437

Lunar Ferroan Anorthosite Subgroups
J. J. McGee
  1438

Evolution of a Hot Spot, Central Eistla Regio, Venus
G. E. McGill
  1439

Production of ferroan andesites by the experimental partial melting of an LL chondrite
J. C. McGuire, A. J. G. Jurewicz, J. H. Jones
  1440

Apatite Fission-Track Age of Marquez Dome Impact Structure, Texas
J. F. McHone, R. B. Sorkhabi
  1441

Synthetic and natural Nakhla pyroxenes: Parent melt composition and REE partition coefficients
G. McKay, L. Le, J. Wagstaff
  1442

Venusian Channel Gradients as a Guide to Vertical Tectonics
L. C. McLeod, R. J. Phillips
  1443

The Distribution and Source of NA in Two Type B1 CAIs
G. P. Meeker
  1444

Determination of Bulk-Carbon Contents in Seven IIIAB Iron Meteorites
A. Meibom, K. L. Rasmussen, O. S. Hansen, P. Hornshøj, N. Rud
  1445

Discovery Day, Introducing Space Science to the High School
R. C. Melchior, J. O. Annexstad
  1446

Crater Chains on the Moon: Records of Comets Split by the Earth's Tides?
H. J. Melosh, E. A. Whitaker
  1447

Genetic Links Between Equatorial and South Polar Regions on Mars?
E. Merényi, W. M. Calvin, K. S. Edgett, R. B. Singer
  1448

A Successful Planetary Science "SPACE" Education Program for Students in Grades 3-8
J. A. Merrell, D. Kenealy, D. Nash
  1449

An Absolute Normalization for Modeled Neutron Flux Distribution
A. E. Metzger, D. M. Drake, E. L. Haines, J. Mazarik, R. C. Reedy
  1450

The Pasamonte Polymict Eucrite-A Reclassification
K. Metzler, K.-D. Bobe, H. Palme, B. Spettel, D. Stöffler
  1451

Isotope Source Table for a 25 Msun Type II Supernova
B. S. Meyer
  1452

Textural and Mineralogical Heterogeneity of Silicate Inclusions in Tsarev Chondrite
L. F. Migdisova, A. A. Yaroshevsky, M. A. Nazarov, N. N. Kononkova
  1453

Cr, Mn, and CA distributions for olivine in angritic systems: Constraints on the origins of Cr-rich and Ca-poor core olivine in angrite LEW87051
T. Mikouchi, G. McKay, L. Le
  1454

Mineral Paragenesis of the Ureilites: Evidence for High Pressure in a Large Parent Body
O. B. Mitreikina, O. V. Chryukina, N. G. Zinovieva, L. B. Granovsky
  1455

ALH84001 Cumulate Orthopyroxenite: A Previously Unappreciated Martian Meteorite
D. W. Mittlefehldt
  1456

Two Types of Shocked Quartz and Graphite at Barringer Impact Crater
Y. Miura
  1457

Lunar Landing Site and Exploration by Japanese Lunar Project
Y. Miura, Lunar Working Group Of JAPAN
  1458

Japanese Found Meteorites Similar to Antarctic Meteorite Collection
Y. Miura, K. Yanai, O. G. Iancu
  1459

New SNC Meteorite ALH84001: Evidence for SNC Meteorite from Noble Gases
Y. N. Miura, N. Sugiura, K. Nagao
  1460

Chemical Zoning of Olivine in Several Pallasites Suggestive of Faster Cooling
M. Miyamoto, H. Takeda
  1461

Partition coefficients for Al, Ca, Ti, Cr, and NI in olivine obtained by melting experiment on an LL6 chondrite
M. Miyamoto, T. Mikouchi, G. A. McKay
  1462

Thermal Infrared Observations of Mars from Palomar Mountain
J. Moersch, T. Hayward, J. Houck, P. Lee, J. Miles, P. Nicholson, M. Smith, S. Squyres, J. Van Cleve
  1463

Geology of the Mahuea Tholus Quadrangle, Venus
H. J. Moore, S. T. Arriola, E. J. Israel
  1464

Rhenium-Osmium Isotope Systematics in IIAB and IIIAB Iron Meteorites
J. W. Morgan, M. F. Horan, R. J. Walker, M. I. Smoliar, J. N. Grossman
  1465

Thermal Conductivity of Planetary Lithospheres: New Estimates from Measurements on Mantle Xenolith Samples
P. Morgan, S. Y. O'Reilly
  1466

Use of Mars Climate History to Demonstrate Causes and Consequences of Global Change on Earth: A Teaching Module for Middle School Students
P. Morgan, R. A. Lynch, G. P. Johnson
  1467

REE Characteristics of an Igneous Inclusion in the Yamato-75097 L6 Chondrite
N. Morikawa, K. Misawa, N. Nakamura, K. Yanai
  1468

Ferromagnetic Resonance Spectra of H2-Reduced Minerals and Glasses
R. V. Morris, C. C. Allen
  1469

Hematite formed from pyroxene on Mars by meteoritic impact
R. V. Morris, J. F. Bell III, H. V. Lauer Jr.
  1470

Moessbauer mineralogy of calcined Murchison meteorite
R. V. Morris, M. E. Zolensky, T. Hiroi, M. E. Lipschutz
  1471

Toward Systematic Estimation of the Origins of Regolith Materials that Might be Sampled During a Lunar Highland Geologic Traverse
B. E. Moss, L. A. Haskin
  1472

Carbon in the Metal of Bishunpur and Other Ordinary Chondrites
S. Mostefaoui, C. Perron
  1473

Impact Craters on Martian Volcanoes
P. J. Mouginis-Mark
  1474

Morphology of Venus Calderas: Sif and Maat Montes
P. J. Mouginis-Mark
  1475

Radar Imaging of the Ice Deposits on Mercury's Poles
D. O. Muhleman, B. J. Butler, M. A. Slade
  1476

Photoclinometric Studies of Crater and Groove Morphology on PHOBOS
D. C. Munro, L. Wilson
  1477

Spectral Units of Martian Soil: Possible Discrimination of Mobile Sediments and Substrate
S. Murchie, J. Mustard
  1478

The HST Spectrum of Phobos: Comparison with Mariner 9, Viking, and PHOBOS 2 Results and with Meteorite Analogs
S. Murchie, B. Zellner
  1479

He, NE and AR from the Solar Wind and Solar Energetic Particles in Metal Separates from Fayetteville and Acfer111
Ch. Murer, H. Baur, P. Signer, R. Wieler
  1480

Limits on the Mafic Mineralogy of Mars Through MGM Analysis of ISM Spectra
J. F. Mustard, J. M. Sunshine
  1481

Mare-Highland Mixing Relationships Along the Southwestern Shores of Oceanus Procellarum
J. F. Mustard, J. W. Head, I. Antenenko
  1482

Why Chondrules Do Not Show and Some CAIs Show Significant Isotopic Fractionation
H. Nagahara
  1483

Diffusion Measurement on Double-Layered Single Crystals of Olivine, Orthopyroxene, and Zircon Synthesized by Epitaxial Overgrowth
H. Nagasawa, M. Morioka
  1484

High-Temperature Shock Effects on Carbonaceous Chondrites
T. Nakamura, K. Tomeoka, T. Sekine, H. Takeda
  1485

Argon Degassing and Crustal Production Rates on Venus
N. Namiki, S. C. Solomon
  1486

The Impact Crater Density on Volcanoes and Coronae on Venus: Implications for Volcanism and Global Resurfacing
N. Namiki, S. C. Solomon
  1487

Mid-Infrared Spectra of Condensed SO2 Phases: Lab Data and Applications to Galileo Mapping of Io
D. Nash, B. Betts
  1488

Shape, size, and distribution of magnetic particles in Bjurbole chondrules
D. F. Nava
  1489

P-rich Sulfide, Barringerite, and Other Phases in Carbonaceous Clasts of the Erevan Howardite
M. A. Nazarov, F. Brandstätter, G. Kurat
  1490

Chemistry of Carbonaceous Xenoliths from the Erevan Howardite
M. A. Nazarov, F. Brandstätter, G. Kurat, B. Spettel, H. Palme
  1491

Utilization of ICP-MS Analytical Techniques for Determination of Siderophile-Element Abundances: Potential Uses for the Planetary Geochemist
C. R. Neal, L. A. Taylor
  1492

The Hermes Mercury Orbiter Mission
R. M. Nelson, L. J. Horn, J. R. Weiss, W. D. Smythe
  1493

Atmospheric Oscillations Initiated by the Penetration of a Comet or an Asteroid into Gaseous Envelope of a Planet
I. V. Nemtchinov, T. V. Loseva
  1494

Waves Created by Comet Impact Into Ocean
I. V. Nemtchinov, A. V. Teterev, S. P. Popov
  1495

The Inner Solar System Impact Record: Lunar, Terrestrial-Planet, and Asteroid Size-Frequency Data Comparison
G. Neukum, B. Ivanov
  1496

Patterns of brittle deformation under extension on Venus
G. A. Neumann, M. T. Zuber
  1497

The Depletion of W in the Earth's Primitive Mantle, A Stumbling Block for High Temperature Equilibrium Core Formation?
H. E. Newsom, P. D. Noll Jr., S. A. Maehr, K. W. W. Sims
  1498

Trapped Noble Gases in Native Gold; Radiogenic He and Fission Xe in U-rich Minerals Accompanying Placer Gold
S. Niedermann, O. Eugster, Ch. Thalmann, R. Frei, J. D. Kramers, L. Bruno, B. Hofmann
  1499

A Search for Solar Energetic Particle Helium in Interplanetary Dust Particles
A. O. Nier, D. J. Schlutter
  1500

Geology of Akkruva Colles Area on Venus: Venera 15/16 SAR Images Analysis
A. M. Nikishin, N. N. Bobina, G. A. Burba
  1501

Recent Histories of Lunar Cores 15009 and 79002/1 Using Cosmogenic Radionuclides 10Be, 26Al, and 36Cl
K. Nishiizumi, R. C. Finkel, M. W. Caffee, P. Sharma, J. Masarik, R. C. Reedy, J. R. Arnold
  1502

Interstellar Corundum and Spinel from the Tieschitz Ordinary Chondrite
L. Nittler, C. Alexander, X. Gao, R. Walker, E. Zinner
  1503

Sudbury Igneous Complex: Evidence Favoring Endogenous Magma Rather Than Impact Melt
M. D. Norman
  1504

Alkali element constraints on Earth-Moon relations
M. D. Norman, M. J. Drake, J. H. Jones
  1505

Formation of iron metal and grain coagulation in the solar nebula
J. A. Nuth III, O. Berg
  1506

Measurement of the decay rate of the SiH feature as a function of temperature
J. A. Nuth III, G. F. Kraus
  1507

Pre-bombardment crystallization ages of basaltic clasts from Antarctic howardites EET87503 and EET87513
L. E. Nyquist, C.-Y. Shih, H. Wiesmann, B. M. Bansal
  1508

New data supporting a Sm-146,147-Nd-142,143 formation interval for the lunar mantle
L. E. Nyquist, H. Wiesmann, B. M. Bansal, C.-Y. Shih
  1509

Galileo's Near Infrared Mapping Spectrometer (NIMS) Science Observation Plan for Europa
A. Ocampo, D. Matson, The NIMS Team
  1510

Calorimetric Thermobarometry of Experimentally Shocked Quartz
K. D. Ocker, J. L. Gooding, F. Hörz
  1511

Penetration of Large Bolides into Dense Planetary Atmospheres-Role of Hydrodynamic Instabilities
J. D. O'Keefe, T. Takata, T. J. Ahrens
  1512

Lithophile Element Diffusion Profiles in Phosphate Phases in IIIAB Iron Meteorites: A Clue to Trace Elements in Metal During Core Formation
E. J. Olsen, I. M. Steele
  1513

I Don't Believe All the Irregularly Shaped Small Bodies in the Solar System are the Result of Collisions
W. A. Oran
  1514

Depositional Patterns at the Mouths of the Martian Outflow Channels (Dao, Harmahkis, Maja, and Ares Valles, Mars)
G. G. Ori
  1515

Constraints on the Origin of the Offset Dikes (Sudbury Impact Structure, Canada) from U-Pb Data
M. Ostermann, U. Schärer, A. Deutsch
  1516

Chromium Isotopic Anomalies in Stepwise Dissolution of Orgueil
U. Ott, F. A. Podosek, J. C. Brannon, T. J. Bernatowicz, C. R. Neal
  1517

Refractory Siderophiles in Antarctic Unequilibrated Ordinary Chondrites
H. Ozaki, M. Ebihara
  1518

New Thermal Models for High-Latitude Impact Craters on Mercury: Implications for Water Ice
D. A. Paige, S. E. Wood, A. R. Vasavada
  1519

Noble Gas Composition of Tektites from Bedias, Texas
R. L. Palma, K. D. Ocker, M. N. Rao
  1520

Re-Os Calibration for Isochron Determinations
D. A. Papanastassiou, H. H. Ngo, G. J. Wasserburg
  1521

ALH 84001 A "SNC Orthopyroxenite": Insights from SIMS Analysis of Orthopyroxene and Comparisons to Diogenites
J. J. Papike, G. W. Fowler, G. D. Layne, M. N. Spilde, C. K. Shearer
  1522

Orthopyroxene as a Recorder of Lunar Mg-Suite Norite Petrogenesis: Preliminary Ion Microprobe Studies of Apollo 17 Fragments
J. J. Papike, G. W. Fowler, C. K. Shearer
  1523

Extensional Tectonics of Arden Corona, Miranda: Evidence for an Upwelling Origin of Coronae
R. Pappalardo, R. Greeley, S. J. Reynolds
  1524

Modelling the Transition Between Hawaiian-Style Lava Fountaining and Strombolian Explosive Volcanic Activity
E. A. Parfitt, L. Wilson
  1525

The Role of Magma Recycling in Controlling the Behavior of Hawaiian-Style Lava Fountains
E. A. Parfitt, L. Wilson, J. W. Head III
  1526

Apron Heights Around "Stepped Massifs" in the Borealis Basin of Mars
T. J. Parker, D. S. Gorsline
  1527

Formation of Complex Ridged Terrain Through Progressive Compressional Deformation in the Northern Ovda Region of Venus
T. J. Parker, R. S. Saunders
  1528

High Spatial Resolution Sulphur Isotopic Analysis of Troilite in Ordinary Chondrites by Ion Microprobe
B. A. Paterson, H. Y. McSween Jr., L. R. Riciputi
  1529

The Composition of SEPs Implanted in Regolith Minerals Depends on Implantation Ranges
A. Pedroni
  1530

Anomalous Metal and Sulfide Abundances in the Regolith-Breccia Acfer111
A. Pedroni, B. Spettel, F. Wlotzka
  1531

A New Imaging Resonance Ionization Mass Spectrometer for Isotopic and Trace Analysis
M. J. Pellin, R. N. Thompson, Z. Ma, A. M. Davis, R. S. Lewis, R. N. Clayton
  1532

Heavy Xenon Isotopes on the Moon and in the Solar Wind
R. O. Pepin
  1533

The Thick Festoon Flow and Adjacent Dark Flow, Ovda Regio, Venus
J. L. Permenter, R. L. Nusbaum
  1534

Lamellar Olivine in the Divnoe Achondrite: EPMA and TEM Studies
M. I. Petaev, A. J. Brearley
  1535

Numerical Model of a Genetic Link Between Acapulco and Y791493 Primitive Achondrites. I: Phase Equilibria and Major Element Constraints
M. I. Petaev, A. A. Ariskin, J. A. Wood
  1536

Numerical Model of a Genetic Link Between the Acapulco and Y791493 Primitive Achondrites. II: Implications to the Origin of Acapulcoites and Lodranites
M. I. Petaev, A. A. Ariskin, J. A. Wood
  1537

MG and TI Partition Coefficients for Anorthite-CAI Liquid: Dependence on Oxygen Fugacity and Melt Composition
M. T. Peters, E. Shaffer, D. S. Burnett
  1538

The Distribution of Lithologic Units in the Western Highlands of the Moon
C. A. Peterson, B. R. Hawke, P. G. Lucey, G. J. Taylor, P. D. Spudis
  1539

Venus Resurfacing History: Constraints from Halo Ejecta Deposits
R. J. Phillips, N. R. Izenberg, J. S. Alexopoulos
  1540

FeO and MgO in plagioclase of lunar anorthosites: Igneous or metamorphic?
W. C. Phinney
  1541

Young Vesta (Regolith)?
C. M. Pieters, R. P. Binzel
  1542

Geophysical Studies of the Montagnais Impact Crater
M. Pilkington, L. F. Jansa, R. A. F. Grieve
  1543

Arachnoid-like Feature on Oldoinyo Lengai, an Active Carbonatite Volcano in Northern Tanzania
H. Pinkerton, J. B. Dawson, D. M. Pyle
  1544

Lava Flow Morphology and Chemistry
H. Pinkerton, J. B. Dawson, D. M. Pyle
  1545

Topographic and Surface Roughness Properties of Steep-Sided Domes on Venus and Earth from Radar Remote Sensing and Field Measurements
J. J. Plaut, E. R. Stofan, D. A. Crown, S. W. Anderson
  1546

Atmospheric vs. Solar Noble Gas Abundances: Isotopic Fractionation in Low Energy Argon Ion Implantation
K. V. Ponganis, Th. Graf, K. Marti
  1547

Prolonged Biospheric Effects of Sulfur Vaporization by the K/T Chicxulub Impact
K. O. Pope, A. C. Ocampo, K. H. Baines, B. A. Ivanov
  1548

Systematics of Xe Isotopes in a Two-layer Earth with Mass Transport
D. Porcelli, G. J. Wasserburg
  1549

Attempt to Observe the Sodium Exosphere of Mercury During the 1993 Solar Transit
A. E. Potter, D. Talent, H. Kurokawa, S. Kawakami, T. H. Morgan
  1550

Discovery and Description of a Muong Nong-type Georgia Tektite
H. Povenmire, B. P. Glass, R. Strange
  1551

PB Isotopic Systematics of Troctolitic Anorthosite 62237
W. R. Premo, M. Tatsumoto
  1552

Young Tectonism and Volcanism on Venus: Age Estimates from Crater Densities
M. Price, J. Suppe, F. Bilotti, G. Watson
  1553

LEW 88774: A New Type of Cr-rich Ureilite
M. Prinz, M. K. Weisberg, C. E. Nehru
  1554

Surface Expression of Gravitational Relaxation of Topography: South Scarp of Lakshmi Planum, Venus
A. A. Pronin, M. A. Kreslavsky
  1555

Solid-Solid Trace-Element Partitioning Between Exsolved Pyroxenes in Cumulate Eucrites
A. Pun, J. J. Papike
  1556

Studies of Mafic Intrusives in the Vredefort Impact Structure, South Africa: Implications for Craton Wide Igneous Activity at 1. 1 GA Ago
G. Q. J. Pybus, W. U. Reimold, C. B. Smith
  1557

Cytherean Dextral Transform Fault Zone from Concave Arc to Concave Arc?
J. Raitala
  1558

Relative Change in Cross-Sectional Area and Albedo with Rotational Phase for 532 Herculina and 45 Eugenia
K. L. Reed, M. J. Gaffey, L. A. Lebofsky
  1559

Cosmogenic-Nuclide Depth Profiles in the Lunar Surface
R. C. Reedy, J. Masarik
  1560

First Observations of Shatter Cones in the Direct Vicinity of the Bushveld Complex
W. U. Reimold, R. C. A. Minnitt
  1561

The Dynamical Evolution of Magnetized Solar Nebula
M. Reyes-Ruiz, T. F. Stepinski
  1562

Terrestrial Polar Beach Processes: Martian Paleolake Analogs
J. W. Rice Jr.
  1563

Analogs and Interpretations for the Martian Thumbprint Terrain and Sinuous Ridges
J. W. Rice Jr., J. D. Mollard
  1564

Searching for a Principal Component Mixing Model for Chondritic Interplanetary Dust Particles: The Use of Size Analyses
F. J. M. Rietmeijer
  1565

Sulfide and Layer Silicate Grain Size Distributions Constrain the Unique Petrogenesis of a Type CM Interplanetary Dust Particle
F. J. M. Rietmeijer
  1566

Lineament Analysis of Fortuna Tessera; A Preliminary Evaluation of a Complex Ridged Terrain, Venus
K. M. Riley, R. C. Anderson
  1567

Hydrated E-class and M-class Asteroids
A. S. Rivkin, D. T. Britt, E. S. Howell, L. A. Lebofsky
  1568

The Weathering Process on Venus Takes 2-3 Hundred Million Years: Evidence from Radiothermal Emissivity Signatures at Coronae
C. A. Robinson
  1569

SO2 and CH4 Levels in the Venusian Atmosphere, Measured by Pioneer Venus: Caused by Plinian-Style Volcanic Activity at Maat Mons?
C. A. Robinson, G. D. Thornhill
  1570

Volumes and Depth of Burial of the Lesser Tharsis Volcanoes
M. S. Robinson, H. Garbeil
  1571

Mass Spectra of Sputtered Sugars: Testing the Assignment of Polyoxymethylene as a Constituent of Comet Halley
M. S. Robinson, T. J. Wdowiak
  1572

Mariner 10 Multispectral Images of the Moon and Mercury
M. S. Robinson, B. R. Hawke, P. G. Lucey, K. Edwards
  1573

The Lesser Tharsis Volcanoes: Clues to Martian Edifice Building Eruptions
M. S. Robinson, P. J. Mouginis-Mark, S. K. Rowland
  1574

Geology and Distribution of Rock Types at the Apollo 17 Landing Site from a 2-4 MM Perspective
K. M. Rockow, B. L. Jolliff, R. L. Korotev, L. A. Haskin
  1575

Compositional Differences Between Impact-Melt Breccias of the North and South Massifs at Apollo 17
K. M. Rockow, R. L. Korotev, B. L. Jolliff, L. A. Haskin
  1576

Luna 24 regolith breccias: A possible source of the fine size material of the Luna 24 regolith
O. D. Rode, M. M. Lindstrom
  1577

Antarctic weathering of the CK chondrites EET90004, 90007, and 90022: Nickel and sulfur mobility
C. S. Romanek, R. A. Socki, E. K. Gibson Jr., J. H. Allton
  1578

The Chondritic Regolith Breccia (H3-6) ACFER 153: Petrography and In-Situ Nuclear Track Investigations
J. Romstedt, K. Metzler
  1579

Thermal Isostasy Process and Lithospheric Structure on Venus
P. Rosenblatt, P. C. Pinet
  1580

Thermal emission measurements (5-25 microns) of Hawaiian palagonitic soils with implications for Mars
T. L. Roush, J. F. Bell III
  1581

Thermal emission measurements (5-25 microns) of palagonite/Fe-substituted montmorillonite intimate mixtures: Applications to Mars
T. L. Roush, J. B. Orenberg
  1582

Transmission measurements (4000-400 cm(exp -1), 2.5-25 microns) of crystalline ferric oxides and ferric oxyhydroxides: Implications for Mars
T. L. Roush, J. F. Bell III, R. V. Morris
  1583

More shock recovery experiments on mesosiderite analogs
L. R. Rowan, D. W. Mittlefehldt
  1584

Contact Metamorphism in Ordinary Chondrite Impact Breccias: Implications for the Impact Heating of Chondrite Parent Bodies
A. E. Rubin
  1585

Comparison of Mars Sinous Ridges with Terrestrial Linear Dunes: Observations from the Field
S. W. Ruff
  1586

Chondrule Formation in Radiative Shock
T. V. Ruzmaikina, W. H. Ip
  1587

Energy Partitioning in Catastrophic Collisions
E. V. Ryan, D. R. Davis
  1588

Past Geological Exploration of the Earth and Future Geological Exploration of the Planets
G. Ryder
  1589

The Petrogenetic Interpretation of Tiny Fragments of Evolved Lunar Rocks: an Analog Analysis of the Abriachan Granite, Scotland
G. Ryder, J. Gillis
  1590

Detectability of Lunar Tephra Deposits: Examples from the Apollo 17 Landing Site
D. E. Sabol Jr., J. B. Adams, M. O. Smith, P. C. Pinet
  1591

Igneous Inclusions from Ordinary Chondrites: High Temperature Residues and Shock Melts
R. O. Sack, M. S. Ghiorso, M. E. Lipschutz
  1592

Search for 26Mg Isotopic Anomaly in Unequilibrated Chondrites and Unique Meteorites
S. Sahijpal, J. N. Goswami, L. L. Kashkarov, N. N. Korotkova, M. A. Nazarov
  1593

Small Volcanic Edifices on Venus: Morphology, Diameter, and Elevation Distributions
J. F. Lockwood, M. Ellison, J. Johnson, G. Komatsu
  1594

Terrestrial Basaltic Counterparts for the Venus Steep-Sided or "Pancake" Domes
S. E. H. Sakimoto
  1595

Thermal Gradients and Kirchhoff's Law
J. W. Salisbury, A. E. Wald, D. M. D'Aria
  1596

Formation of Continuous Ridges on Icy Satellites by Cooling Gravity-Current Volcanism
S. Sasaki, R. Kono, Y. Iwase
  1597

Scientific Analysis and Display of Magellan Venus Data with McIDAS-eXplorer
R. S. Saunders', S. S. Limaye, L. A. Sromovsky, R. Krauss, E. Wright, D. Santek, P. Fry
  1598

Genesis and Parameters of Ultramylonite and Pseudotachylite (Puchezh-Katunky Astrobleme, Russia)
L. Sazanova, N. Korotaeva
  1599

Venus: Fractured Craters Revisited, and the Evidence for Minimal Geologic Activity Over the Past 300 m. y.
G. G. Schaber, R. G. Strom, D. J. Chadwick
  1600

Venusian Parabolic Halos: Numerical Model Results
C. J. Schaller, H. J. Melosh
  1601

Lobate Thrust Scarps and the Thickness of Mercury's Lithosphere
P. Schenk, H. J. Melosh
  1602

The Stereo View of the Solar Sytem
P. Schenk, D. Wilson, R. Morris, T. J. Parker
  1603

Hole Size from Impacts at Scaled Velocities of 7 to 21 km/s
R. M. Schmidt, K. R. Housen
  1604

Calculation of Hugoniot Curves and Post-Shock Temperatures for H- and L-Chondrites
R. T. Schmitt, A. Deutsch, D. Stöffler
  1605

Chicxulub as an Oblique Impact
P. H. Schultz
  1606

Atmospheric Containment of Crater Growth
P. H. Schultz, O. S. Barnouin
  1607

Penetrating and Escaping the Atmospheres of Venus and Earth
P. H. Schultz, S. Sugita
  1608

Comparative Rock Mass Strengths of Basalt and Tuff and Some Planetological Implications
R. A. Schultz
  1609

Outstanding Tectonic Problems in the Valles Marineris Region of Mars
R. A. Schultz
  1610

Distribution of siderophile and other trace elements in melt rock at the Chicxulub impact structure
B. C. Schuraytz, D. J. Lindstrom, R. R. Martinez, V. L. Sharpton, L. E. Marin
  1611

Preliminary description of double drive tube 68002/68001
C. Schwarz, R. V. Morris, R. L. Korotev
  1612

1:1 Million-scale Geologic Maps of Mars' Tharsis Montes
D. H. Scott, J. R. Zimbelman, J. M. Dohm
  1613

Evaporation and Recondensation of Volatiles During Chondrule Formation
E. R. D. Scott
  1614

Evaporation and Recondensation During Chondrule Formation
D. W. G. Sears, M. E. Lipschutz
  1615

Numerical Ocean Tides on Titan: Spherical Case
W. D. Sears
  1616

Current activities and results of the Long Duration Exposure Facility Meteoroid and Debris Special Investigation Group
T. H. See, K. S. Leago, J. L. Warren, R. P. Bernhard, M. E. Zolensky
  1617

NIMS-Callisto Science Objectives and Observational Plans
M. Segura, J. Sunshine, T. McCord, The NIMS Team
  1618

SEM Study of Metal Grain Surface in Ordinary Chondrites. I. Primary Sculptures
V. P. Semenenko, B. V. Tertichnaya
  1619

SEM Study of Metal Grain Surface in Ordinary Chondrites: II. Secondary Sculptures
V. P. Semenenko, B. V. Tertichnaya
  1620

Examination of the Relation Between Rifting and Volcanism in the Juno Dorsum Region of Venus
D. A. Senske
  1621

Radar Characteristics of Geologic Units in the Carson Quadrangle, Venus
D. Senske, R. Greeley, K. Bender
  1622

The Global Geology of Venus: Classification of Landforms and Geologic History
D. A. Senske, R. S. Saunders, E. R. Stofan, The Magellan Science Team
  1623

Pyrolysis Typing of Meteoritic Organic Matter
M. A. Sephton, C. T. Pillinger, I. Gilmour
  1624

Student Explorer Demonstration Initiative: Affordable Access to Space
J. Sevier, P. Coleman
  1625

Nebula Matter Differentiation as a Result of Condensation
A. I. Shapkin, Yu. I. Sidorov
  1626

The Problem of High Precision Measurements of 142Nd/144Nd: The Terrestrial Record of 146Sm
M. Sharma, D. A. Papanastassiou, G. J. Wasserburg, R. F. Dymek
  1627

Constraints on Excavation and Mixing During the Chicxulub Impact Event
V. L. Sharpton, L. E. Marín, B. C. Schuraytz, P. D. Spudis, G. Ryder
  1628

Light Lithophile Elements (Li, Be, B) in Lunar Picritic Glasses. Implications for Lunar Mantle Dynamics and the Origin of the Moon
C. K. Shearer, G. D. Layne, J. J. Papike
  1629

The Earth-Moon Connection. Clues Preserved in Lunar Picritic Magmas
C. K. Shearer, J. J. Papike, H. E. Newsom
  1630

Innovative Instrumentation for Mineralogical and Elemental Analyses of Solid Extraterrestrial Surfaces: The Backscatter Mössbauer Spectrometer/X-Ray Fluorescence Analyzer (BaMS/XRF)
T. D. Shelfer, R. V. Morris, T. Nguyen, D. G. Agresti, E. L. Wills
  1631

A Ferroelectric Model for the Low Emissivity Highlands on Venus
M. K. Shepard, R. E. Arvidson, R. A. Brackett, B. Fegley Jr.
  1632

Ion Microprobe Studies of Lunar Highland Cumulate Rocks: Preliminary Results
J. W. Shervais
  1633

Remote Sensing Assessment of the Lunar Soil Maturation
V. V. Shevchenko
  1634

Tektite-Obsidian-like Glasses from Space
M. Shima, M. Honda, A. Okada, T. Okada, Y. Kobayashi, M. Ebihara, Y. N. Miura, K. Nagao
  1635

Is There Umov Effect for the Moon in Polarization Minimum?
Yu. G. Shkuratov, N. V. Opanasenko
  1636

Pu-Xe Ages of Eucrites
A. Shukolyukov, F. Begemann
  1637

Unusual Refractory Inclusions from a CV3 Chondrite Found Near Axtell, Texas
S. B. Simon, L. Grossman, J. F. Wacker
  1638

Geoid/Topography Admittance on Venus from Models of Convection with No Crustal Deformation
M. Simons, B. H. Hager, S. C. Solomon
  1639

The Magellan Quasi-Specular Bistatic Radar Experiment
R. A. Simpson, G. H. Pettengill, P. G. Ford
  1640

Venus Gravity Field Determination: Progress and Concern
W. L. Sjogren, A. S. Konopliv
  1641

Pre-Allende Planetesimals with Refractory Compositions: The CAI Connection
W. R. Skinner
  1642

Rounding of Chondrules by Abrasion: A Cautionary Note Regarding Textural Evidence
W. R. Skinner, H. C. Connolly Jr.
  1643

Access to Large Planetary Science Data Bases
S. Slavney, T. Stein, R. E. Arvidson
  1644

The topography of Mars: A re-evaluation of current data
D. E. Smith, M. T. Zuber
  1645

The mass of Mars, Phobos, and Deimos, from the analysis of the Mariner 9 and Viking Orbiter tracking data
D. E. Smith, F. G. Lemoine, S. K. Fricke
  1646

The Imager for MESUR Pathfinder (IMP)
P. H. Smith, D. T. Britt, L. R. Doose, R. B. Singer, M. G. Tomasko, F. Gliem, H. U. Keller, J. M. Knudsen, L. A. Soderblom
  1647

Interpretation of Magellan Gravity Data for Large Volcanic Swells on Venus: Implications for Interior Structure
S. E. Smrekar
  1648

The Status of Mercury Exploration
W. Smythe, R. Lopes-Gautier, A. Ocampo, R. Nelson
  1649

A Sortie for Pristine Rocks at Mare Tranquillitatis: A Ferroan Anorthosite, A New Group D Basalt, and the Isotopic Composition of Group D High-Ti Basalts
G. A. Snyder, E. A. Jerde, L. A. Taylor, D.-C. Lee, A. N. Halliday
  1650

A Basaltic Safari Across the Cayley Plains and Over the Descartes Mountains: Still Searching for a Pristine Highlands Basalt at Apollo 16
G. A. Snyder, J. Karner, E. A. Jerde, L. A. Taylor
  1651

Silicate Liquid Immiscibility in Anorthosite Suites: Viewing the Moon from Wyoming and Labrador
G. A. Snyder, J. Mitchell, L. A. Taylor, E. C. Simmons
  1652

Petrology and Chemistry of the Magnesian Suite: Further Evidence of Liquid Immiscibility and Metasomatism in the Western Highlands of the Moon
G. A. Snyder, C. R. Neal, L. A. Taylor, A. N. Halliday
  1653

Chronology and Petrogenesis of the Western Highlands Alkali Suite: Cumulates from Quartz Monzodiorite (QMD) Liquids
G. A. Snyder, L. A. Taylor, A. N. Halliday
  1654

Rb-Sr Isotopic Systematics of Lunar Ferroan Anorthosite 62237
G. A. Snyder, L. A. Taylor, A. N. Halliday
  1655

Evolved QMD-Melt Parentage for Lunar Highlands Alkali Suite Cumulates: Evidence from Ion-Probe Rare-Earth Element Analyses of Individual Minerals
G. A. Snyder, L. A. Taylor, E. A. Jerde, L. R. Riciputi
  1656

Journey to the Center of the Regolith: Petrology and Mineral Chemistry of a New Ferroan Anorthosite from Drive Tube 68002/68001
G. A. Snyder, L. A. Taylor, A. D. Patchen
  1657

Crystal Sizes in Magma Oceans: Application to the Suspension Problem
V. S. Solomatov, D. J. Stevenson
  1658

Gravity Anomalies over Volcanoes on Venus: Implications for Lithospheric Thickness and Volcano History
S. C. Solomon, P. J. McGovern, M. Simons, J. W. Head
  1659

The Bimodal Size Distribution of Near-Earth Asteroids
D. H. Speidel
  1660

Laser Fusion 40Ar-39Ar Dating of Pseudotachylites from the Vredefort Impact Structure: New Evidence for a Major Formation Event at 2.0 GA
J. G. Spray, S. P. Kelley
  1661

Return to Mercury: The Discovery-Mercury Polar Flyby Mission
P. D. Spudis, J. B. Plescia, A. D. Stewart
  1662

41K Excess in Efremovka CAIs
G. Srinivasan, J. N. Goswami, A. A. Ulyanov
  1663

Trajectory Calculation of Individual Particles from LDEF Impacts
F. J. Stadermann
  1664

Spectral Variation Within Mare Tranquillitatis: Implications for Stratigraphy and Mixing Mechanisms
M. I. Staid, C. M. Pieters, J. W. Head
  1665

Longitudinal Variations of the Linear Polarization in Jupiter's Polar Regions at the System III and IV Periods
O. M. Starodubtseva, L. A. Akimov, V. V. Korokhin, V. G. Tejfel
  1666

Reflectance Spectra of Particle Size Separates of Lunar Soils: Is the Difference Controlled by Reduced Iron?
L. V. Starukhina, Yu. G. Shkuratov, O. D. Rode, C. M. Pieters
  1667

Chemical Zoning and Exsolution in Olivine of the Pavlodar Pallasite: Comparison with Springwater Olivine
I. M. Steele
  1668

Crystal Structure of Chladniite Na2CaMg7(PO4)6, from Carlton (IIICD) Iron Meteorite
I. M. Steele
  1669

Oscillatory Zoning in Forsterite from Carbonaceous and Unequilibrated Ordinary Chondrites: Implications for Origin of Some Forsterite
I. M. Steele
  1670

New TOF-SIMS Results on Hydrated Interplanetary Dust Particles
T. Stephan, E. K. Jessberger, H. Rulle, K. L. Thomas, W. Klöck
  1671

Carbonate Formation on Mars: Implications of Recent Experiments
S. K. Stephens, D. J. Stevenson, L. F. Keyser, G. R. Rossman
  1672

Noachian and Hesperian modification of the original Chryse impact basin topography
S. Stockman, H. Frey
  1673

Classification and Nomenclature of Impact Metamorphic Rocks: A Proposal to the IUGS Subcommission on the Systematics of Metamorphic Rocks
D. Stöffler, R. A. F. Grieve
  1674

Status of the Small Body Mapping Program
P. J. Stooke
  1675

Promoting Planetary Science Among Elementary School Students
M. M. Strait
  1676

The Global Resurfacing History of Venus
R. G. Strom, G. G. Schaber, D. D. Dawson
  1677

Impact Ejecta Vapor Cloud Interference Around Venus Craters
S. Sugita, P. H. Schultz
  1678

Isotopic Composition of Nitrogen in the PCA91002 Chondrite
N. Sugiura, S. Zashu
  1679

New Evidence for Compositional Diversity on the Marius Hills Plateau from Galileo Multi-Spectral Imaging
J. M. Sunshine, C. M. Pieters, J. W. Head
  1680

Microanalysis of Iron Oxidation States Using X-Ray Absorption Spectroscopy
S. R. Sutton, S. Bajt, J. S. Delaney
  1681

Brownlee's Particles of Cosmic Origins in Deep Sea Sediments
Y. Suzuki, M. Noma, H. Sakurai, K. Yamakoshi, H. Matsuzaki, N. Kano, K. Nogami
  1682

Radiation Emitted During the Flight: Application to Assessment of Bolide Parameters from the Satellite Recorded Light Flashes
V. V. Svetsov
  1683

The Thermal History of the Lunar Regolith at the Apollo 16 and 17 Sites
S. J. Symes, P. H. Benoit, D. W. G. Sears
  1684

Comet Shoemaker-Levy 9 Impact on Jupiter-The First Ten Minutes
T. Takata, J. D. O'Keefe, T. J. Ahrens, G. S. Orton
  1685

Orthopyroxene with Dusty Core and Clear Rims in Acapulco and Its Related Formation Process to Lodranites
H. Takeda, M. Miyamoto
  1686

Mineralogy of Apollo 12 Low-Ti Basalts in Relation to Lunar Meteorites from Mare Region
H. Takeda, T. Arai, K. Saiki
  1687

Inhomogeneous distribution of materials in lodranites-acapulcoites and IAB irons and their common formation processes
H. Takeda, M. Otsuki, A. Yamaguchi, M. Miyamoto, M. Otsuki, M. Tomobuchi, T. Hiroi
  1688

Strain Measurements of Impact Craters on Tempe Terra, Mars
K. L. Tanaka, M. P. Golombek
  1689

Eolian History of the Hellas Region of Mars
K. L. Tanaka, G. J. Leonard
  1690

Experimental and Theoretical Examination of Cosmic Dust Grain Deceleration
W. G. Tanner Jr., W. M. Alexander, S. Stephenson
  1691

Slow Emplacement of Flood Basalts: Evidence from Fractal Properties of Lava Flows
G. J. Taylor, B. C. Bruno, S. Self
  1692

Planar Deformation Features in Quartz Grains from Resurge Deposit of the Lockne Structure, Sweden
A. M. Therriault, M. Lindström
  1693

New Studies of Mass Independent Isotopic Fractionation Processes and Their Occurrence in the Early Solar System, Mars, and the Earth
M. H. Thiemens
  1694

First Observation of a Mass Independent Isotopic Fractionation in a Condensation Reaction
M. H. Thiemens, R. Nelson, Q. W. Dong, J. A. Nuth III
  1695

Anatomy of a cluster IDP. Part 2: Noble gas abundances, trace element geochemistry, isotopic abundances, and trace organic chemistry of several fragments from L2008#5
K. L. Thomas, S. J. Clemett, G. J. Flynn, L. P. Keller, D. S. McKay, S. Messenger, A. O. Nier, D. J. Schlutter, S. R. Sutton, R. M. Walker
  1696

The anatomy of a cluster IDP. Part 1: Carbon abundance, bulk chemistry, and mineralogy of fragments from L2008#5
K. L. Thomas, L. P. Keller, W. Klock, J. Warren, G. E. Blanford, D. S. McKay
  1697

Ida: Topography, Slopes and Grooves
P. Thomas, J. Veverka, M. J. S. Belton, Galileo Imaging Science Team
  1698

Deformation of Large Bolides During Atmospheric Passage: Comparison of SPH and Analytic Models
P. J. Thomas, L. Brookshaw, G. Starkey
  1699

Teaching Planetary Surface Processes and Mapping to Advanced 5th and 6th Grade Students
P. Thompson, S. Murchie, R. Herrick, B. Schuraytz, G. Ryder
  1700

Magellan Mission Progress Report
T. W. Thompson, Magellan Flight Team
  1701

A Simple Model for Particle Support in Pyroclastic Flows
G. D. Thornhill
  1702

Properties of Lava Flows Associated with Coronae in S. E. Aphrodite Terra, Venus
K.-A. Tomkinson, L. Wilson
  1703

Semi-Objective Determination of Lithologic End-Members in Geologic Environment (Spectral Mixture Analysis)
S. Tompkins, J. F. Mustard, C. M. Pieters, D. W. Forsyth
  1704

4. 56 GA U-Th-Pb Age of MET 78008 Ureilite
N. Torigoye, M. Tatsumoto, K. Yanai
  1705

Areal Distribution of Double-Type Coronae and Corona-like Features on Venus, and Their Relation to Topography, Tesserae and Deformation Belts
T. Törmönen, K. Kauhanen
  1706

Two Source Areas for the SNC Meteorites: Petrologic, Chemical, and Chronologic Evidence
A. H. Treiman
  1707

Chemical Weathering on Venus: Preliminary Results on the Interaction of Basalt with Carbon Dioxide
A. H. Treiman, C. C. Allen
  1708

The parent magma of xenoliths in shergottite EETA79001: Bulk and trace element composition inferred from magmatic inclusions
A. H. Treiman, D. J. Lindstrom, R. R. Martinez
  1709

The temperature of nitrogen on Pluto
K. A. Tryka, R. H. Brown, D. P. Cruikshank, T. C. Owen
  1710

Purity and Cleanness of Aerogel as a Cosmic Dust Capture Medium
P. Tsou, R. H. Fleming, P. M. Lindley, A. Y. Craig, P. Blake
  1711

How Does Venus Lose Its Heat?
D. L. Turcotte
  1712

Stress and Flexural Modeling of Alba Patera, Mars
E. P. Turtle, H. J. Melosh
  1713

Excitation Functions of the Neon Isotopes in Chondrites and Achondrites
G. K. Ustinova
  1714

On Possible Disturbance of the Solar Modulation Mechanism Over a Long-Time Scale
G. K. Ustinova, A. K. Lavrukhina
  1715

Shock Deformation in Talc and Its Possible Significance for Investigations of Astroblemes
A. A. Valter
  1716

A Silicate Lava Model for Io's Hotspots
G. J. Veeder, D. L. Blaney, T. V. Johnson, D. L. Matson
  1717

Nitrogen and Carbon Components in C_δ: A Possible Presence of Nitrogen-Free Diamonds in C_δ
A. B. Verchovsky, J. Newton, I. P. Wright, J. W. Arden, C. T. Pillinger
  1718

Impact Erosion of Atmospheres
A. M. Vickery
  1719

A quick look method of detecting water of hydration in small solar system bodies
F. Vilas
  1720

Fireworks Around Naked T Tauri Stars
A. V. Vityazev, G. V. Pechernikova
  1721

Generalized Coagulation Equation and Mass-Spectrum of Protoplanet
A. Vityazev, Yu. Kukharenko, A. Bashkirov, G. Pechernikova
  1722

Surface Energy Measurements of Comminuted Silicates: Implications for Cosmochemical Processes
R. Voelkel, R. F. Giese, C. J. van Oss
  1723

Depositional Units in Western Maxwell Montes: Implications for Mountain Building Processes on Venus
R. W. Vorder Bruegge
  1724

Variation in Compressional Structures Across Maxwell Montes: Evidence for a Sequence of Events in a Venusian Orogeny
R. W. Vorder Bruegge
  1725

Rare Earth Element Distributions in Chassigny: Clues to Its Petrogenesis and Relation to the Nakhlites
M. Wadhwa, G. Crozaz
  1726

Modeling the Thermal Infrared Directional Emissivity of Large, Close-Packed, Particulate Media
A. E. Wald, J. W. Salisbury
  1727

TEM Studies on the Dislocations in Olivine of Taizhou Meteorite from Jiangsu Province China
H. Wang, W. Rong, F. Zheng, C. Lin
  1728

Chemical and Isotopic Fractionation During the Evaporation of the FeO-Mgo-SiO2-CaO-Al2O3-TiO2-REE Melt System
J. Wang, A. M. Davis, R. N. Clayton, T. K. Mayeda
  1729

Kinetic Isotopic Fractionation During the Evaporation of the Iron Oxide from Liquid State
J. Wang, A. M. Davis, R. N. Clayton, T. K. Mayeda
  1730

Coorbital Bending Waves and Inclination Decay
W. R. Ward, J. M. Hahn
  1731

Petrologic Insights Regarding Lunar and Planetary Meteorite Launch Processes
P. H. Warren
  1732

Petrology of LEW88774: an Extremely Chromium-rich Ureilite
P. H. Warren, G. W. Kallemeyn
  1733

Chondrule magnetic properties
P. J. Wasilewski, M. V. Obryan
  1734

The Evolution of Nebular Solids: Evidence from Compound Chondrules and from Igneous Rims on Chrondules in Ordinary Chondrites
J. T. Wasson, A. N. Krot
  1735

The Abundance and Stable Isotopic Composition of Volatiles Released from Weathering Products During Stepped Heating of Nakhla and Lafayette
L. L. Watson, S. Epstein, E. M. Stolper
  1736

Morphologic Studies of Contractional Features on Mars Using Photoclinometrically Derived Elevation Profiles
T. R. Watters, M. S. Robinson
  1737

Trace Element and Isotopic Measurements of Refractory Inclusions from the ACFER 182 Carbonaceous Chondrite
D. Weber, E. K. Zinner, A. Bischoff
  1738

Origin of "Rubble Pile" Cometary Nuclei
S. J. Weidenschilling
  1739

Primitive Trapped Xe in Lodran Minerals and Further Evidence from EET84302 and Gibson for Break-up of the Lodranite Parent Asteroid 4 MA Ago
A. Weigel, O. Eugster
  1740

Agglomeratic Olivine (AO) Chondrules in Ordinary Chondrites
M. K. Weisberg, M. Prinz
  1741

Radiophysical Properties of Impact Craters on Venus
C. M. Weitz, J. J. Plaut, H. J. Moore
  1742

Detectability of Carbonate in Unconsolidated and Indurated Sediments
M. L. Wenrich, P. R. Christensen
  1743

Provenance of the Terrestrial Planets
G. W. Wetherill
  1744

Dark-Floored Crater Elevations on Venus: Implications for Crater-centered Volcanism
R. W. Wichman
  1745

Comet Disruption and Crater Chain Formation in the Earth-Moon System
R. W. Wichman, C. A. Wood
  1746

Analytical Modeling of Thermal Erosion by Low-Viscosity Lava Flows and Implications for Planetology
D. A. Williams, R. Greeley
  1747

Mars: Volcanic Eruption Theory and Relationships to Observed Landforms
L. Wilson, J. W. Head
  1748

Clast Sizes of Basaltic Ejecta from Explosive Eruptions on Asteroids
L. Wilson, K. Keil
  1749

Lunar LIGO and gravitational wave astronomy on the Moon
T. L. Wilson, N. Lafave
  1750

Advanced technology lunar telescope
T. L. Wilson, Wei-K. Chu, P. C. Chen
  1751

Numerical Simulation of Scattering by Discrete Objects
P. B. Wong, R. A. Simpson, G. L. Tyler
  1752

A Remotely Operated Planetary Science Observatory to Enhance Space Education
C. A. Wood, P. Abell
  1753

An Asteroid Family Among the NEAs?
C. A. Wood, R. Fevig, J. Nordlie
  1754

Occurrences of Low-Emissivity Surface Material at Low Altitudes on Venus: A Window to the Past
J. A. Wood
  1755

Identifying Controlling Mineral Phases in Basalt Chemistries: On Beyond Pearce Element Ratio Diagrams
A. Woronow
  1756

Parental Magma Compositions of Basalts Using an Artificial Neural Network: Theory
A. Woronow, A. M. Reid, J. H. Jones, N. E. Pingitore Jr.
  1757

Attempts to Produce Carbon-Free Silica Aerogel for Micrometeroid Capture Cells
I. P. Wright, H.-P. Huang, C. T. Pillinger
  1758

Could the Original Sudbury Structure Have Been Circular?
J. Wu, B. Milkereit, D. Boerner, B. Robertson
  1759

Magellan Radar Data for Venus Topographic Mapping
S. S. C. Wu, E. A. Howington-Kraus
  1760

Windblown sand on Mars: The effect of saltation threshold on drift potentials derived from Mars GCM
P. Xu, R. Greeley, S. Williams, J. B. Pollack
  1761

26AI and 10Be Activities and Exposure Ages of Lodranites, Acapulcoites, Kakangari and Pontlyfni
S. Xue, G. F. Herzog, J. Klein, R. Middleton
  1762

Granulitic Matrices in Monomict Eucrites
A. Yamaguchi, H. Takeda
  1763

Tidal Disruption of Comet Shoemaker-Levy-9 Nuclei Just Before the Impact on Jupiter
M. Yanagisawa, T. Konno
  1764

AEM Study of the Tetrataenite Rim of Metal Phases in Meteorites
C. W. Yang, D. B. Williams, J. I. Goldstein
  1765

Lunar Mare Deposit Volumes, Composition, Age, and Location: Implications for Source Areas and Modes of Emplacement
R. A. Yingst, J. W. Head
  1766

Advanced Generation Condensation Calculations: Compositions of Fassaite, Spinel and Plagioclase in the Solar Nebula
S. Yoneda, L. Grossman
  1767

Retention of Sodium Under Transient Heating Conditions-Experiments and Their Implications for the Chondrule Forming Environment
Y. Yu, R. H. Hewins
  1768

Can Sulfide Minerals Survive the Chondrule-forming Transient Heating Event?
Y. Yu, R. H. Hewins, B. Zanda, H. C. Connolly
  1769

Oxygen Isotope Distribution in Fassaite of Allende CAI
H. Yurimoto, H. Nagasawa, O. Matsubaya
  1770

Spectrophotometry of Martian Satellites with the Hubble Space Telescope
B. Zellner, E. N. Wells
  1771

Simultaneous adsorption of CO2 and H2O under Mars-like conditions and application to the evolution of the Martian climate
A. P. Zent, R. Quinn
  1772

The Complex Thermal History of Enstatite Chondrites
Y. Zhang, P. H. Benoit, D. W. G. Sears
  1773

The Unique Thermal History of EL Chondrites and a New Means of Classifying Equilibrated Enstatite Chondrites
Y. Zhang, S. Huang, P. H. Benoit, D. W. G. Sears
  1774

Gravitational Relaxation of Planetesimals
I. N. Ziglina
  1775

Computer Simulation of Lava Flow Emplacement on the Terrestrial Planets
J. R. Zimbelman
  1776

1:5,000,000-scale Geologic Mapping of the Kawelu Planitia Quadrangle (V16) on Venus
J. R. Zimbelman
  1777

Mafic Magnetic Volcaniclastic Dunes: A Possible Mars Analog in the Andes of Ecuador
J. R. Zimbelman, K. S. Edgett
  1778

Evidence for Extraneous Perovskites in CAIs from the Efremovka (CV3) Meteorite: A Combined Petrographic, Trace Element, and Isotopic Study
E. Zinner, A. El Goresy
  1779

Crystallization in the Silicate Part of the Experimental Melted Ordinary Chondrite Tsarev (L5)
N. G. Zinovieva, O. B. Mitreikina, L. B. Granovsky
  1780

Liquid Immiscibility Process of the Experimental Melted Ordinary Chondrite Tsarev (L5)
N. G. Zinovieva, O. B. Mitreikina, L. B. Granovsky
  1781

The Chemical Composition of Acapulco and Acapulcoites
J. Zipfel, H. Palme
  1782

Mineralogy of an unusual CM clast in the Kaidun meteorite
M. E. Zolensky, A. V. Ivanov, S. V. Yang, R. A. Barrett, L. Browning
  1783

Mineralogy of artificially heated carbonaceous chondrites
M. E. Zolensky, M. E. Lipschutz, T. Hiroi
  1784

Near-Surface Atmosphere of Venus: New Estimations of Redox Conditions Based on New Data
M. Yu. Zolotov
  1785

Phase Relations in the Fe-Ti-Mg-O Oxide System and Hematite Stability at the Condition of Venus' Surface
M. Yu. Zolotov
  1786

Lunar horizon glow and the Clementine mission
H. A. Zook, A. E. Potter
  1787

Rheology, tectonics, and the structure of the Venus lithosphere
M. T. Zuber
  1788

Formation of fold and thrust belts on Venus due to horizontal shortening of a laterally heterogeneous lithosphere
M. T. Zuber, E. M. Parmentier, G. A. Neumann
  1789