Lunar and Planetary Institute






Seventeenth Lunar and Planetary Science Conference

TABLE OF CONTENTS

no.

Lunar Sourced Inorganic Composites for Space Construction
W. N. Agosto
  1001

Spectral Properties of Selected Soils from the Dry Valleys of Antarctica
D. G. Agresti, R. V. Morris, J. A. Newcomb, H. V. Lauer
  1002

Evidence for Superparamagnetism in the Orgueil and Tieschitz Meteorites
D. G. Agresti, M. A. Qasem, T. J. Wdowiak
  1003

Mars: Volcanic Plains in the Cratered Uplands and Possible Tectonic Associations
E. F. Albin, R. Greeley
  1004

Cretaceous/tertiary Event: Iridium Distribution in Turkmenia Sections
A. S. Alekseev, L. D. Barsukova, G. M. Kolesov, M. A. Nazarov, K. N. Amanniyazov
  1005

Shock Wave Experiments on Iron Sulfide and Sulfur in Planetary Cores
W. W. Anderson, T. J. Ahrens
  1006

Zelda's Neighborhood: Xenophagia of an Equilibrated Fremdling by Spinel
J. T. Armstrong, I. D. Hutcheon, G. J. Wasserburg
  1007

Cooling History of Apollo 17 Orange and Black Glasses: Implications for Their Formation
J. Arndt, W. V. Engelhardt
  1008

On the Rate of Formation of Sedimentary Debris on Mars
R. E. Arvidson
  1009

Shocked Quartz Grains from K/t Boundary Sediments
D. D. Badjukov, M. A. Nazarov, I. V. Suponeva
  1010

Mass Independent Oxygen Isotopic Fractionation in the Microwave Region
S. K. Bains, M. H. Thiemens
  1011

Lithospheric Modelling of Venus
W. B. Banerdt, M. P. Golombek
  1012

Relative Ages of Martian Terrain Units
N. G. Barlow, R. G. Strom
  1013

Impact Features and Projectile Flux on Returned Solar Max Material
R. A. Barrett, H. A. Zook, J. L. Warren, L. S. Schramm, D. S. McKay
  1014

Mineral Composition of Venus' Soil at Venera 13, Venera 14, and VEGA 2 Landing Sites: Thermodynamic Prediction
V. L. Barsukov, S. P. Borunov, V. P. Volkov, M. Yu. Zolotov, Yu. I. Sidorov, I. L. Khodakovsky
  1015

Mineral Compositions and Assemblages in Chondrules of Different Mineralogical-Structural Types of the Allende CV Carbonaceous Chondrite
G. V. Baryshnikova, S. A. Stakheeva, K. I. Ignatenko, A. K. Lavrukhina
  1016

A Probabilistic Approach to Ballistic Differentiation of Surfacial Soils on Moon-Like Planets
A. Basu, R. N. Bhattacharya
  1017

Digital Image Models of Planetary Surfaces
R. M. Batson
  1018

Oxygen Fugacities in the Solar Nebula during Crystallization of Fassaite in Allende Inclusions
J. R. Beckett, L. Grossman
  1019

IRAS Asteroid and Comet Ground-Based Data File
D. F. Bender, E. F. Tedesco
  1020

The Origin of the Moon: 3d Numerical Simulations of a Giant Impact
W. Benz, W. L. Slattery, A. G. W. Cameron
  1021

40AR-39AR Ages of Apollo 16 North Ray Crater Rocks and Dimict Breccias
T. J. Bernatowicz, M. M. Lindstrom, F. A. Podosek
  1022

Diversity of Parent Magmas of Pristine Lunar Rocks
M. G. Bersch, G. J. Taylor, K. Keil
  1023

Partial Melting of a Martian Mantle
C. Bertka, J. R. Holloway
  1024

Mars: Gravity, Topography and Dynamic Compensation
B. G. Bills, M. A. Richards, W. S. Kiefer
  1025

Characterization of Venera 15/16 Units Using Pioneer Venus Reflectivity and RMS Slope
D. L. Bindschadler, J. W. Head
  1026

VEGA Landing Sites: Venera 15/16 Unit Analogs from Pioneer Venus Reflectivity and RMS Slope
D. L. Bindschadler, J. W. Head, J. B. Garvin
  1027

Oxidation of Refractory Metal-Rich Assemblages at High Temperatures
A. Bischoff, H. Palme
  1028

Extraterrestrial Olivines Brought Back from Space
G. E. Blanford, F. J. M. Rietmeijer, L. S. Schramm, D. S. McKay
  1029

Cone Crater Consortium, Apollo 14: (1) Identification and Frequency Distribution of Rock Types in the Crater Basement
K. Bobe, S. Lingner, D. Stoffler
  1030

Interactive Processing of Venus Images
I. Bockstein, P. Chochia, M. Kronrod
  1031

Does Venus' Atmosphere Contain a Terrestrial-Like Component?
D. Bogard
  1032

Noble Gases Implanted by Artificial Shock: Implications for Trapped Martian Gases in the EETA79001 Meteorite
D. D. Bogard, F. Horz, P. Johnson, R. Schmidt
  1033

The Lunar Endogenic "monomineralic" Glasses
O. A. Bogatikov, N. A. Ashikhmina, D. I. Frikh-Khar
  1034

Worldwide Size Distribution of Shocked Quartz at the K/t Boundary: Evidence for a North American Impact Site
B. F. Bohor, G. A. Izett
  1035

Magnetic Properties of Shocked and Thermally Altered Nontronite
M. B. Boslough, E. L. Venturini, R. A. Graham
  1036

Composition of Apatite and Biotite from the Stillwater and Bushveld Complexes. Part II
A. E. Boudreau, E. A. Mathez, I. S. McCallum
  1037

The Aeolian Environment on Venus
S. Bougan, R. Greeley, J. Marshall
  1038

Cosmic-Ray Tracks Versus 60CO: a Strong Discrepancy in Shielding Depths
M. Bourot-Denise, P. Pellas, C. Perron
  1039

Trace Elements in Efremovka Fine-Grained Inclusion E14: Evidence for High Temperature, Oxidizing Fractionations in the Solar Nebula
W. V. Boynton, D. A. Wark, A. A. Ulyanov
  1040

Solar Max Impact Particles: Perturbation of Captured Material
J. Bradley, W. Carey, R. M. Walker
  1041

Small Valley Networks and the Past and Present Distribution of Subsurface Volatiles, Aeolis Quadrangle, Mars
G. R. Brakenridge
  1042

The Effect of Preoxidation on the Rate and Extent of Reduction of Ilmenite
R. A. Briggs, A. Sacco
  1043

Evidence for 26AL and MG Isotopic Heterogeneity in a Fine-Grained CAI
C. A. Brigham, I. D. Hutcheon, D. A. Papanastassiou, G. J. Wasserburg
  1044

Multispectral Interpretation of Geologic Materials Exposed at the Viking Lander Sites
E. A. Bruckenthal, R. B. Singer, E. A. Guinness, R. E. Arvidson
  1045

Allende: Profile of Parent Body Growth
T. E. Bunch, S. Chang, P. Cassen, R. Reynolds
  1046

Ferric Hydrolysates on Mars: Basic Fe(iii) Sulfates
R. G. Burns
  1047

Hisingerite and Iddingsite: Deuteric Alteration Products of Basalts on Mars
R. G. Burns
  1048

The Hydrogen Content of Lunar Soils
R. Bustin, R. H. Carr, E. K. Gibson, M. A. Sommer
  1049

Conformity as Measured by a Straight - Petrological Shibboleth Set Straight
J. C. Butler
  1050

Pre-Compaction Irradiation of Meteorite Grains
M. W. Caffee, J. N. Goswami, C. M. Hohenberg, T. D. Swindle
  1051

Density and Composition of the Mercury Mantle after Evaporative Mass Loss
A. G. W. Cameron, B. Fegley
  1052

Gas Chromatographic Instrumentation for the Analysis of Aerosols and Gases in Titan's Atmosphere
G. C. Carle, D. R. Kojiro, B. J. O'Hara, T. W. Scattergood, J. R. Valentin
  1053

Effusion Rates of High-Volume Lavas, Alba Patera, Mars
P. Cattermole
  1054

High Volume Volcanic Flows at Alba Patera, Mars
P. Cattermole
  1055

Linear Volcanic Features at Alba Patera, Mars
P. Cattermole
  1056

Monte Carlo Simulation of Trapped Liquid Density: Implications for the Compaction of Igneous Cumulates
C. I. Chalokwu
  1057

S (not Equal To) N (maybe Equal) C
J. H. Chen, G. J. Wasserburg
  1058

Synchrotron X-Ray Fluorescence Analysis of ni, cu, zn, ga, ge, se, and Pb(as) in Unpolished Cosmic Spherules
P. Chevallier, C. Jehano, M. Maurette, S. Sutton, J. Wang
  1059

Further Aspects of Lunar Palaeointensity Determinations and the Origin of the Ancient Lunar Magnetic Field
S. K. Chowdhary, S. K. Runcorn, D. W. Collinson, A. Stephenson
  1060

New Molecular Species Ejected from Residues of Irradiated Volatiles: Implications for Comets
D. Chrisey, J. W. Boring, R. E. Johnson, W. L. Brown, L. J. Lanzerotti, G. Foti
  1061

Charged-Particle Alteration of Volatiles on Outer Solar System Bodies
D. Chrisey, J. Phipps, J. W. Boring, R. E. Johnson, L. I. Lanzerotti, W. L. Brown
  1062

Seasonal Variability of Martian Surface Albedos: Implications for Dust Deposition and Removal
P. R. Christensen
  1063

Seasonal and Diurnal Variability of Mars Water-Ice Clouds
P. R. Christensen, R. W. Zurek, L. L. Jaramillo
  1064

Geomorphic Evidence for Subsurface Volatile Reservoirs in the Elysium Region of Mars
E. H. Christiansen, J. A. Hopler
  1065

Spray: a Chondritic Interplanetary Dust Particle Containing Refractory Minerals
R. Christoffersen, P. R. Buseck
  1066

FMR and Mossbauer Measurements of the Iron Distribution in the Luna 16, 20, and 24 Grain Size Fractions
A. Cimbalnikova, Z. Frait, O. D. Rode, T. Zemcik
  1067

Impact Experiments on the NASA KC-135 Reduced-Gravity Aircraft: Early Results
M. J. Cintala, F. Horz, T. H. See
  1068

Venus: Images of Rolling Hills Terrane from Tristatic S-Band Radar Observation
P. E. Clark, R. F. Jurgens, M. Kobrick
  1069

Mercury: New Results from Dual Polarization Measurements at X-Band
P. E. Clark, R. F. Jurgens, T. W. Thompson, L. Robinett, F. Chan, S. Brokl, C. Franck, E. Stone
  1070

Carbon Isotopes in Interstellar Aluminium
D. D. Clayton
  1071

Oxygen, Silicon, and Magnesium Isotopes in Leoville Refractory Inclusions
R. N. Clayton, T. K. Mayeda, H. Palme, J. Laughlin
  1072

Oxygen Isotope Confirmation of a Genetic Association Between Achondrites and IIIAB Iron Meteorites
R. N. Clayton, T. K. Mayeda, M. Prinz, C. E. Nehru, J. S. Delaney
  1073

The Mars Thermal Model (marstherm): a FORTRAN 77 Finite-Difference Program Designed for General Distribution
S. M. Clifford, C. J. Bartels
  1074

Predictive Thermodynamic Modeling for Trace Element Partitioning in Magmatic Systems
R. O. Colson, L. A. Taylor, G. A. McKay
  1075

Preliminary Hypervelocity Impact Calibration of Solar Max Thermal Blankets and Louvers
B. Cour-Palais
  1076

Thermal Models of Marginal Differentiation on Ganymede and Callisto
S. K. Croft
  1077

Isotopic Provenance of Aluminous Mare Basalt from the Fra Mauro Formation
E. J. Dasch, C.-Y. Shih, B. M. Bansal, H. Wiesmann, L. E. Nyquist
  1078

Eruption Pressures during Phase 23 OF the Pu'u 'o'o Eruption on Kilauea, Hawaii: Planetary Implications
A. G. Davies, L. Wilson
  1079

Magnesium and Titanium Isotopic Compositions and Trace Element Chemistry of Refractory Inclusions in the Ornans Carbonaceous Chondrite
A. M. Davis, R. W. Hinton
  1080

Experimental Studies of Catastrophic Disruption
D. R. Davis, S. J. Weidenschilling, E. V. Ryan, B. L. Williams
  1081

Global Petrologic Variations on the Moon: a Ternary Diagram Approach
P. A. Davis, P. D. Spudis
  1082

Cathodoluminescence of Type 3 Ordinary Chondrites
J. Dehart, D. W. G. Sears
  1083

Ring Furrows of the Martian Highlands
R. A. de Hon, E. E. McDaniel
  1084

Phase Equilibria for Basaltic Achondrites
J. S. Delaney
  1085

The Basaltic Achondrite Planetoid
J. S. Delaney
  1086

A New Aspect of Apollo 14 Regolith Breccias: Different Glass Populations and Their Potential for Charting Space/time Variations
J. W. Delano
  1087

Chemical Variations among the Moldavite Tektites: Major-Element Data
J. W. Delano, V. Bouska, M. M. Fernandez
  1088

Collaborative Study of the Apollo 15 Pristine Yellow/brown Glasses: an Interim Report
J. W. Delano, S. S. Hughes, R. A. Schmitt
  1089

Warning to Lunar Glass Students: Possible Contamination from Colored Ovoids Produced by Gas Lighter-Misch Metal Flints
J. W. Delano, P. L. Verplanck, S. S. Hughes, R. A. Schmitt
  1090

Rb-Sr Studies of Apollo 16 Impact Melt Rocks
A. Deutsch
  1091

On the Age of Lunar Anorthosites
A. Deutsch, H. Palme, D. Stoffler
  1092

The Isotopic Composition of Hydrogen in Some Carbonaceous Chondrites
A. L. Devirts, A. A. Ulyanov, A. V. Ivanov, E. P. Lagutina, Yu. A. Shukolyukov
  1093

A Possible Origin for Chondrule-Like Particles in the 3.6-3.3 GA Barberton Greenstone Belt, South Africa
M. J. de Wit
  1094

Platinoids in a 3.6 GA Nickel-Iron Occurrence: Implications for Early Terrestrial Evolution and Iridium Anomalies
M. J. de Wit, M. Tredoux, R. J. Hart, R. Armstrong, J. P. F. Sellschop
  1095

Calculations of Martian Cosmic Ray Induced Neutron Spectra
D. M. Drake, W. C. Feldman, B. M. Jakosky
  1096

Site Selection for a Lunar Base; Science Considerations
M. B. Duke, D. S. McKay, W. W. Mendell
  1097

The Oxygen Isotope Geochemistry of the Stillwater Complex
J. T. Dunn, I. S. McCallum
  1098

Can Cratering Periodicities BE Produced AD Lib?
R. J. Durrheim, W. U. Reimold
  1099

The Effects of Composition, Oxygen Fugacity, and Crystal Structure on the Color of Hibonite
M. D. Dyar, T. C. Solberg, R. G. Burns
  1100

A New Instrument to Measure Charged and Neutral Cometary Dust Particles at Low and High Impact Velocities
T. Economou, J. A. Simpson, A. J. Tuzzolino
  1101

Geophysical Results from Ramso Island in Lake Mien, an Impact Site in Southern Sweden
A. Ekelund
  1102

Space Photographs of Drought in Africa
F. El-Baz
  1103

Planetary Metamorphic Events in Unequilibrated EH Chondrites
A. El Goresy, D. S. Woolum, K. Ehlers, A. V. Ivanov
  1104

Bushveld Complex, South Africa: is Rooiberg Felsite an Impactite?
W. E. Elston, D. Twist
  1105

High-Pressure Crystal-Liquid Fractionation of Basaltic Magmas: a Phase-Equilibria Framework
D. Elthon
  1106

Anomalies Induced in MG Isotopes by Sputtering
T. M. Esat, S. R. Taylor
  1107

MG Isotope Composition of Ivory Coast Microtektites
T. M. Esat, S. R. Taylor
  1108

Noble Gases in Grain Size Fractions of Lunar Anorthosite 60018: Trapped Xenon Isotopically Similar to Terrestrial Atmospheric Xenon
O. Eugster
  1109

Single-Stage Exposure of the Lunar Highland Breccias 60018, 67435, and 67455
O. Eugster, S. Niedermann
  1110

TI and MG Isotopic Measurements in CM and CV Meteorites
A. Fahey, J. N. Goswami, K. D. McKeegan, E. Zinner
  1111

A Calculated Relative Volatility Sequence for Lithophile Refractory Trace Elements in the Solar Nebula
B. Fegley
  1112

A Comparison of REE and Refractory Metal Oxidation State Indicators for the Solar Nebula
B. Fegley
  1113

Predicted Chemical Models of the Deep Atmosphere of Uranus
B. Fegley, R. G. Prinn
  1114

Discriminant Analysis of the Pristine Lunar Glasses: Implications for a Magma Ocean
M. M. Fernandez, J. W. Delano
  1115

Uranium-Series Dates for Ice from Two Allan Hills Locations
E. L. Fireman
  1116

The Assemblage Metal-Ca Inclusion in the Efremovka CV Chondrite
A. V. Fisenko, K. I. Ignatenko, L. F. Semjonova, A. K. Lavrukhina
  1117

Distribution Coefficient of Argon in a Basalt/felspar System
D. E. Fisher
  1118

Metamorphic Temperatures and Enstatite Chondrites
R. A. Fogel, P. C. Hess, M. J. Rutherford
  1119

Nitrogen Isotope Studies of the Bencubbin Meteorite
I. A. Franchi, I. P. Wright, C. T. Pillinger
  1120

Ancient Fractures in the Tharsis Region
R. A. Francis
  1121

Apollo 16 Highland Rocks from Sample 63500: Preliminary Results of Geochemical Thermometry
M. Ya. Frenkel, M. I. Korina, E. V. Koptev-Dvornikov, A. A. Ariskin, A. A. Yaroshevsky
  1122

Pseudocraters as Indicators of Ground Ice on Mars
H. Frey
  1123

The Martian Crustal Dichotomy: Product of Accretion and not a Specific Event?
H. V. Frey, R. A. Schultz, T. A. Maxwell
  1124

Crater Counts in the Transition Zone in Eastern Mars: Evidence for Common Resurfacing Events
H. Frey, A. M. Semeniuk, J. A. Semeniuk, S. Tokarcik
  1125

Effects of Grain Sizes on the Spectral Reflectance of Mineral Mixtures -- Towards an Inversion Problem for Three Components Mixtures
N. Fujii, H. Azuma, K. Ito, M. Miyamoto
  1126

Limits on the Extent of Chemical and Convective Isolation in the Earth's Interior
S. J. G. Galer, S. L. Goldstein, R. K. O'Nions
  1127

Possible Impact Structures in Central Africa
J. B. Garvin
  1128

A Remote Sensing of the Elgygytgyn Impact Crater
J. B. Garvin, R. A. F. Grieve
  1129

Characteristics of the Venera and VEGA Landing Sites from Pioneer Venus Radar Data
J. B. Garvin, J. W. Head
  1130

Dielectric Properties of Venus Landing Sites
J. B. Garvin, J. W. Head
  1131

The Spacewatch Camera: a Progress Report
T. Gehrels, J. E. Frecker, R. S. McMillan, J. V. Scotti
  1132

Earth's Atmosphere during the Archean as Seen from Carbon and Nitrogen Isotopic Analysis of Sediments
E. K. Gibson, L. P. Carr, I. Gilmour, C. T. Pillinger
  1133

Laser Microprobe Study of Cosmic Dust (idps) and Potential Source Materials
E. K. Gibson, M. S. Sommer
  1134

No Evidence for a 0.8-0.9 M.Y. Old Micro-Australite Layer in Deep-Sea Sediments
B. P. Glass
  1135

Tectites and Impact Glasses: Specific Features of Microstructure
L. I. Glazovskaya, V. V. Golubkov
  1136

Lithospheric Flexure and Shallow Faulting on the Moon
M. P. Golombek
  1137

Extensional Tectonic Features as Indicators of Lithospheric Strength and Early Thermal Profiles on Ganymede
M. P. Golombek, W. B. Banerdt
  1138

Carbonaceous Chondrites: Thermal Analysis by Differential Scanning Calorimetry (dsc)
J. L. Gooding
  1139

Water-Ice in the Martian Regolith: Experimental Investigation of Lithologic Effects
J. L. Gooding
  1140

Trapped Primary Silicate Liquid in Ureilites
C. A. Goodrich
  1141

Micromorphometry of Lunar Breccias
B. Grabowska-Olszewska, M. Zbik
  1142

A Search for Circum-Asteroidal Material Using a Stellar Coronagraph
J. Gradie
  1143

Sulfur Deposition on Silicates: Effects on Band Strengths
J. Gradie
  1144

Analytical Simulation of a 10-KM-DIAMETER Asteroid Impact Into a Terrestrial Ocean: Part 3--CRATERING Mechanics
L. B. Grant, S. Schuster, D. J. Roddy
  1145

Microtektites at the Cretaceous/tertiary Boundary
G. Graup, J. Huth, U. Rast, B. Spettel
  1146

Observations of Active Sulfur Flows: Implications for IO
R. Greeley, S. W. Lee
  1147

Two-Body Models for Planetary Encounters: Failure Criteria and a Strategy for Their Systematic Evaluation
R. Greenberg, A. Carusi, G. B. Valsecchi
  1148

The K/t Impact Event: Some Implications from the Evidence
R. A. F. Grieve, V. L. Sharpton
  1149

Kamacite-Perryite Assemblages in the Kaidun III Meteorite
V. I. Grokhovsky, A. V. Ivanov
  1150

The Origin of Chondrules and Clasts Bearing Calcic Plagioclase in Ordinary Chondrites
J. N. Grossman, A. E. Rubin
  1151

Bulk Chemical Composition of a Fremdling from an Allende Type B Inclusion
L. Grossman, A. M. Davis, V. Ekambaram, J. T. Armstrong, I. D. Hutcheon, G. J. Wasserburg
  1152

A Study of the Effect of Devitrification on Thermoluminescence in Type 3.4 Ordinary Chondrites
R. K. Guimon, G. E. Lofgren, D. W. G. Sears
  1153

Laboratory Metamorphism of a Primitive Meteorite
R. K. Guimon, D. W. G. Sears, G. E. Lofgren
  1154

Elgygytgyn Crater Glassy Bombs: from Impactites to Tektites
E. P. Gurov
  1155

Implications for Substrate Volatile Distributions on Mars from Complex Crater Morphology and Morphometry
W. S. Hale-Erlich
  1156

Lithospheric Loading and Tectonics of the Lunar Irregular Maria
J. L. Hall, S. C. Solomon
  1157

Shock History of Ordinary Chondrites: Some H and L Antarctic-Non Antarctic Comparisons
M. Haq, F. A. Hasan, D. W. G. Sears
  1158

Suspected Burnt-Out Comets: Outer Solar System Origin Confirmed
W. K. Hartmann, D. J. Tholen, D. P. Cruikshank
  1159

Thermoluminescence Studies of Shock Loaded Oligoclase and Bytownite
C. P. Hartmetz, D. W. G. Sears, R. Ostertag
  1160

The Manson, Iowa, Impact Structure and the Cretaceous-Tertiary Boundary Event
J. B. Hartung, G. A. Izett, C. W. Naeser, M. J. Kunk, J. F. Sutter
  1161

Natural Thermoluminescence of Antarctic Meteorites: a Study of Thermal/radiation History and Pairing
F. A. Hasan, M. Haq, D. W. G. Sears
  1162

A Hibonite-Rich Murchison Inclusion with Anomalous Oxygen Isotopic Composition
A. Hashimoto, R. W. Hinton, A. M. Davis, L. Grossman, T. K. Mayeda, R. N. Clayton
  1163

Chemical Trends in Anorthosites of the Etagaulet Massif
L. A. Haskin, P. A. Salpas
  1164

Analytical Simulation of a 10-KM-DIAMETER Asteroid Impact Into a Terrestrial Ocean: Part 2--ATMOSPHERIC Response
P. J. Hassig, M. Rosenblatt, D. J. Roddy
  1165

Ishtar Terra, Venus: a Simple Model of Large-Scale Tectonic Convergence, Crustal Thickening, and Possible Delamination
J. W. Head
  1166

Venus Global Tectonics: Tectonic Style and Evidence for Latitudinal Distribution of Tectonic Features
J. W. Head
  1167

VEGA Landing Sites: Geological Characteristics of the Surrounding Region, Rusalka Planitia, Venus
J. W. Head, J. B. Garvin, D. B. Campbell, G. H. Pettengill, H. Masursky, R. S. Saunders, V. L. Barsukov, A. T. Basilevsky, Y. A. Surkov
  1168

The Effect of Isotopic Abundance on Nomadic Chemistry
J. E. Heidenreich, M. H. Thiemens
  1169

Dark-Floored Craters on Ganymede: Evidence for Devolatilized Impact Melt
P. Helfenstein
  1170

Photometrically Determined Surface Physical Properties of Terrains on Ganymede
P. Helfenstein
  1171

Dynamics of a Confined Lava Flow on Kilauea - of Rheology and Eruption Conditions
S. E. Heslop, H. Pinkerton, L. Wilson, J. W. Head
  1172

Buckminsterfullerene, C60, and Siblings: Their Properties as Traps for Inert Gas Atoms
D. Heymann
  1173

A Qualitative Laser-Raman Study of Graphitic Carbon in Allende
D. Heymann, E. Burke, J. Touret
  1174

Carbon in Dark Inclusions of the Allende Meteorite
D. Heymann, C. C. A. H. van der Stap, R. D. Vis, H. Verheul
  1175

Lunar Surface Neutrons and Gamma Rays Revisited
J. C. Higdon, E. F. Plechaty, E. H. Canfield, R. E. Lingenfelter
  1176

Trace Elements and Calcium Isotopes in the Murchison Corundum-Hibonite Inclusion GR-1
R. W. Hinton, A. M. Davis
  1177

The Search for the Scaling Laws of Impact Cratering: Recent Numerical Results
K. A. Holsapple
  1178

Solar-Like Noble Gases in Terrestrial Diamonds
M. Honda, P. McConville, J. H. Reynolds, E. Roedder
  1179

Magnetosphere Influences on the Evolution of Planetary Rings
L. L. Hood
  1180

Lunar Composition and Structure: II. Theoretical Seismic Velocity Models
L. L. Hood, J. H. Jones
  1181

Lunar Composition and Structure: III. Mantle Density Models and Implications for the Existence of a Metallic Core
L. L. Hood, J. H. Jones
  1182

Distribution of Lunar Craters and Multi-Ring Basins: a Test for Lunar Polar Wandering
D. M. Hooper, T. A. Maxwell
  1183

Effects of Elevation and Plains Thicknesses on Martian Crater Ejecta Morphologies for the Ridged Plains
V. M. Horner, R. Greeley
  1184

Viking IRTM Studies of the Crater Curie
V. M. Horner, J. R. Zimbelman
  1185

How do Collisional Outcomes Depend on Size Scale?
K. R. Housen, K. A. Holsapple
  1186

Laboratory Simulations Relevant to CV Parent Body Alteration
R. M. Housley
  1187

Possible CV Parent Body Alteration Processes
R. M. Housley
  1188

A Spectroscopic Analog to the Silicate Component of Martian Dust
R. Huguenin, S. Harris, R. Carter
  1189

On the Origin of Planetary Noble Gases
G. R. Huss, E. C. Alexander
  1190

MG Isotopic Studies of CAI in C3V Chondrites
I. D. Hutcheon, J. T. Armstrong, G. J. Wasserburg, A. El Goresy
  1191

New Data on the Bencubbin Polymict Stony-Iron Breccias
R. Hutchison
  1192

ALUMINIUM-26 in a Murchison Hibonite?
T. R. Ireland
  1193

Laboratory Synthesis of Calcium Dialuminate and Hibonite
T. R. Ireland
  1194

Magnesium Isotopic Systematics of Murchison Refractory Inclusions
T. R. Ireland, T. M. Esat, W. Compston
  1195

Are Hills Comet Showers the Cause of Geologic Cooling Events?
A. A. Jackson
  1196

Sm-Nd and Rb-Sr Systematics of the SNC Meteorite ALHA 77005
E. Jagoutz
  1197

Thermal Conductivity of Comet Surface Ice
B. M. Jakosky
  1198

Are the Viking Lander Sites Representative of the Surface of Mars?
B. M. Jakosky, P. R. Christensen
  1199

The Observed Day-To Variability of Mars Water Vapor
B. M. Jakosky, M. R. Lapointe, R. W. Zurek
  1200

A New Look at Rnaa Data for Lunar Fragment-Laden Impact Melts
O. B. James
  1201

A Review of Recent Research on the Apollo 16 Site
O. B. James
  1202

A Potpourri of Regolith Breccias: Distinctive "new" Samples of the Lunar Surface
E. A. Jerde, P. H. Warren, G. H. Heiken, D. T. Vaniman
  1203

Quantitative Spectral Mixture Modeling Applied to Viking Lander Images
P. E. Johnson, M. Smith, J. B. Adams
  1204

Experimental Partitioning of ag, mo, PB and pd Between Iron Metal and Troilite
J. H. Jones, T. M. Benjamin, C. M. Maggiore, C. J. Duffy, S. R. Hart
  1205

Lunar Composition and Structure: I. a Method for Calculating Mantle Mineralogies
J. H. Jones, L. L. Hood
  1206

Arcuate Ground Undulations, Gelifluxion-Like Features and "front Tori" in the Northern Lowlands on - do they Indicate?
H.-P. Jons
  1207

Volatile/mobile Trace Elements in LL4-6 Chondrites
P. W. Kaczaral, M. E. Lipschutz
  1208

Compositional Characterization of Enstatite Chondrites
G. W. Kallemeyn, J. T. Wasson
  1209

Morphologic Variations of Martian Rampart Crater Ejecta and Their Dependencies and Implications
J. S. Kargel
  1210

Thermoluminescence and the Metamorphic History of the CO Chondrites
B. D. Keck, D. W. G. Sears
  1211

Deuterium Exchange during Acid-Demineralisation
J. F. Kerridge, R. Shipp, S. Chang
  1212

Smooth Plains Formation on Mercury
W. S. Kiefer, B. C. Murray
  1213

Dynamic Models for Venus' Long-Wavelength Geoid
W. S. Kiefer, M. A. Richards, B. H. Hager, B. G. Bills
  1214

Origin of the Moon: a Preliminary Numerical Study of Colliding Planets
M. E. Kipp, H. J. Melosh
  1215

Identification of Cosmogenic Argon Components in Allende by Laser Microprobe
C. Kirschbaum
  1216

Morphology of Large Valleys on Hawaii: Implications for Groundwater Sapping and Comparisons to Martian Valleys
R. C. Kochel, J. O. Piper
  1217

St. Helena Island, Cameroon, Darfur, Rungwe Volcanoes, Walvis Ridge, Benue Trough, Bangui Anomaly: Different Features Tied to One Radial-Concentric Superstructure of the Congo Craton
G. G. Kochemasov
  1218

Muong Nong Type Tektites from the Moldavite and North American Strewn Fields?
C. Koeberl
  1219

Blue Glass from Zhamanshin Impact Crater (ussr)
C. Koeberl, D. D. Badyukov, M. A. Nazarov
  1220

Apollo 16 Lunar Highland Rocks from Sample 63500: Bulk Composition and Mineral Chemistry
M. I. Korina, N. N. Kononkova
  1221

Was Hibonite the Carrier of the Super-Refractory REE Component in the Solar Nebula?
A. S. Kornacki
  1222

Fractionation Patterns among Siderophile and Lithophile Refractory Trace Elements in Cai's: Implications for Grain Transport in the Solar Nebula
A. S. Kornacki, B. Fegley
  1223

Non-Chondritic Ni/co Ratios in Metal Associated with Apollo 16 Regolith and Other Samples from the Lunar Highlands. Part 1. the Observation and Problem
R. L. Korotev
  1224

Non-Chondritic Ni/co Ratios in Metal Associated with Apollo 16 Regolith and Other Samples from the Lunar Highlands. Part 2. Possible Reasons and Implications
R. L. Korotev
  1225

Trace Element Concentrations in the Fine Grain-Size Fractions of Experimental Regoliths
R. L. Korotev, T. H. See, F. Horz
  1226

Gravity-Spreading Origin of the Venusian Tesserae
R. C. Kozak, G. G. Schaber
  1227

Microdistribution of Germanium in the Allan Hills A77081 Winonaite
A. Kracher
  1228

Ice in Solar System
M. S. Krass
  1229

O/h in the Solar Nebula Gas in the Zones of C2, C3, and UOC Chondrule Formation
D. A. Kring
  1230

Accretion Rate of Extraterrestrial Matter: an Iridium Profile for the Last 67 MA
F. T. Kyte
  1231

Fractal Phenomena in the Solar System: a Heuristic Suggestion
B. Lang, A. V. Vityazev
  1232

Ion Microprobe Sensitivities and Their Application to Multielement Analysis of LDEF Impact Residues
G. Lange, S. Eigner, E. Igenbergs, E. K. Jessberger, H. Kuczera, D. Maas, S. Sutton, U. Weishaupt, E. Zinner
  1233

Impact Vaporization and the Accretion of Icy Planets
M. A. Lange, T. J. Ahrens
  1234

An Overview of the Shergotty Consortium Studies
J. C. Laul
  1235

Chemistry of Luna 24 Grain Size Separates
J. C. Laul, O. D. Rode
  1236

Rare Earth Patterns in Shergottite Phosphates
J. C. Laul, M. R. Smith
  1237

Elemental Composition of Chondrules of Some Structural Types in the Ochansk H4, Saratov L3-4, Kainsaz CO Chondrites
A. K. Lavrukhina, A. Yu. Ljul, G. V. Baryshnikova, G. M. Kolesov
  1238

H2O, c, xe, in the Impact-Metamorphosed Specimens of Carbonaceous Chondrites Murray, Murchison CM
A. K. Lavrukhina, Z. K. Milnikova, S. V. Pershin, D. Vu. Minh, Yu. A. Shukolyukov
  1239

IRTM Thermal and Albedo Observations of Syrtis Major
S. W. Lee
  1240

Collisional Sticking Phenomena as Related to Growth of Planetary Embryo
J. Leliwa-Kopystynski, Z. Czechowski
  1241

Thermal Inertias for the Elysium and Aeolis Quadrangles of Mars
L. A. Leshin, J. R. Zimbelman
  1242

Diffusive Mass Fractionation of Atmospheric Xenon
K. Liffman, D. Heymann
  1243

Mass Fractionation of Noble Gases due to Adsorption
K. Liffman, D. Heymann
  1244

Lunar Magnetization Concentrations (magcons) Antipodal to Young Large Impact Basins
R. P. Lin, K. A. Anderson, L. L. Hood
  1245

Conductivities of Silicate Melts; Applications to Lunar Smelting
D. J. Lindstrom, L. A. Haskin, K. W. Semkow, R. H. Lewis
  1246

Electrochemical Monitoring of Crystal Growth from Silicate Melts; Preliminary Conductivity Studies
D. J. Lindstrom, K. W. Semkow
  1247

Diversity of Rock Types in Apennine Front Breccias
M. M. Lindstrom
  1248

TI3+ in Meteoritic and Synthetic Hibonite: a New Oxygen Barometer
D. Live, J. R. Beckett, F.-D. Tsay, L. Grossman, E. Stolper
  1249

Fractional Crystallization of Ultramafic Mare Magmas
J. Longhi
  1250

The Architecture of the Ol-Pl Pseudoternary Liquidus Diagram
J. Longhi, V. Pan
  1251

Physiographic Features on Venus and Earth: a Photogeologic Comparison
P. D. Lowman, J. B. Garvin
  1252

More on RECENT(?) Dark Volcanic Patches in the Valles Marineris, Mars
B. K. Lucchitta
  1253

Northern Sinks on Mars?
B. K. Lucchitta, H. M. Ferguson, C. Summers
  1254

Hydrogen Cyanide Polymers in the Solar System
R. Ludicky, J. Nelson, C. Matthews
  1255

High Resolution Electron Microscopy of Carbonaceous Material from ci, cm, cv, and H Chondrites
G. R. Lumpkin
  1256

Influence of Pressure and Temperature on Natural Graphitization: Thermal Histories of Some Carbonaceous Meteorites
G. R. Lumpkin
  1257

Ubiquitous Feo-Rich Pyroxenes in Enstatite Chondrites: Implications for Metamorphism and Brecciation
D. Lusby, E. R. D. Scott, K. Keil
  1258

Sand-Grain Response in Planetary Atmospheres
D. J. MacKinnon
  1259

Refinements and Developments on the Stratospheric Dust Database and Classification Scheme
I. D. R. MacKinnon, D. S. McKay
  1260

Surface Morphology of Cometary Nuclei
M. C. Malin, J. R. Zimbelman
  1261

Experimental Partitioning Studies of Siderophile Elements amongst Lithophile Phases: Preliminary Results Using PIXE Microprobe Analysis
D. J. Malvin, M. J. Drake, T. M. Benjamin, C. J. Duffy, M. Hollander, P. S. Z. Rogers
  1262

Neutron Exposure Age of the Cape York Iron Meteorite
K. Marti, S. V. S. Murty, K. Nishiizumi
  1263

Breccia 67015: a Comparison with Other North Ray Crater Ejecta
U. B. Marvin, M. M. Lindstrom
  1264

Ages of Rocks and Channels in Prospective Martian Landing Sites of Mangala Valles Region
H. Masursky, M. G. Chapman, A. L. Dial, M. E. Strobell
  1265

The IRAS Asteroid and Comet Survey: a Progress Report
D. L. Matson, G. J. Veeder, E. T. Tedesco, L. A. Lebofsky
  1266

Evolution of the Terrestrial Planets: Accretion, Atmosphere Formation and Thermal History
T. Matsui, Y. Abe
  1267

Oxygen Isotope Variations Within Allende Refractory Inclusions
T. K. Mayeda, R. N. Clayton, H. Nagasawa
  1268

Cosmogenic Nuclide Production in Ellipsoidal Meteoroids
A. F. McDowell, L. E. Nyquist
  1269

High-Resolution Color Images of Mars
A. S. McEwen
  1270

Petrology of Granulitic Breccia Clasts from Feldspathic Fragmental Breccia 67975
J. J. McGee
  1271

Precursor(s) of Lunar Granulitic Rock 67415: Monomict Noritic Anorthosite or Polymict Breccia?
J. J. McGee
  1272

Nature of Early Deformation in the Southwestern Part of the Michipicoten Greenstone Belt, Ontario
G. E. McGill, C. H. Shrady
  1273

Pyroxene Distribution Coefficients, the Shergotty Parent Melt, and Metasomatic Alteration
G. McKay, J. Wagstaff, L. Le
  1274

Hydrogen and Magnesium Isotopic Abundances in Aluminum-Rich Stratospheric Dust Particles
K. D. McKeegan
  1275

Complex Igneous Processes on the Shergottite Parent Body
H. Y. McSween
  1276

Evidence for Liquid Water "lava" Eruptions on Europa in the White Line Feature Agenor Linea
T. A. Meier
  1277

Spectral Classification of Dark Lineations on Europa and Evidence for Plume-Style Water Eruption Resurfacing
T. A. Meier
  1278

A Martian Large-Crater Origin for the SNC Meteorites
H. J. Melosh, A. M. Vickery
  1279

The Application of Gamma-Ray Spectroscopy to the Climatology of Mars
A. E. Metzger, J. R. Arnold, R. C. Reedy, J. I. Trombka, E. L. Haines
  1280

Precise Determination of REE and Other Elements in Individual Chondrules from the Allende (CV3) Chondrite
K. Misawa, N. Nakamura
  1281

Petrology, Chronology and Chemistry of Basaltic Clasts from Mesosiderites
D. W. Mittlefehldt, B. M. Bansal, C.-Y. Shih, H. Wiesmann, L. E. Nyquist
  1282

Anomalous Total Dose of Esr Data in Danish Calcite at K-T Boundary
Y. Miura
  1283

Differences in Formation Condition and Process of Terrestrial and Extraterrestrial Plagioclases
Y. Miura
  1284

Terrestrial and Extraterrestrial Osumilite-Group Minerals and Potash Feldspars
Y. Miura
  1285

Infrared Diffuse Reflectances (2.5-25UM) of the Murchison and Allende Meteorites
M. Miyamoto
  1286

Melting Experiments on an LL Chondrite
M. Miyamoto, D. S. McKay, G. E. Lofgren, M. B. Duke
  1287

Landform Identification in Lunar Radar Images
H. J. Moore, T. W. Thompson
  1288

Oxygen Isotope Fractionation in the Primitive Solar Nebula: Bulk Properties
G. E. Morfill, R. N. Clayton
  1289

Oxygen Isotope Fractionation in the Primitive Solar Nebula: Theory
G. E. Morfill, R. N. Clayton
  1290

Dislocation Substructures of Olivine Crystals from Pallasite Meteorites
H. Mori
  1291

Evidence for Hematite on Mars: Spectral Properties of Ferric Iron Phases in Annealed, Al-Rich Precipitates of Fe-Al Sulfate Salt Solutions
R. V. Morris, H. V. Lauer
  1292

Implications for Lunar Composition from an Investigation of the Nakamura Seismic Velocity Model
S. W. Mueller, R. J. Phillips
  1293

Remote Sensing and Geologic Studies of the Lassell Region of the Moon
A. Muller, B. R. Hawke, P. G. Lucey, C. M. Pieters
  1294

Tektite-Like Bodies from Lonar Crater, India
A. V. Murali, M. E. Zolensky, M. A. Sommer, D. P. Blanchard
  1295

Break-Up of Dark Terrain and the Formation of Bright Terrain on Ganymede: Evidence for Strike-Slip Faulting
S. L. Murchie, J. W. Head
  1296

CO2-DRIVEN Water Volcanism on Ganymede and its Implications for Volcanic and Tectonic Styles
S. L. Murchie, J. W. Head
  1297

Global Reorientation of Ganymede by the Basin Gilgamesh: Models and Evidence from Tectonic Patterns
S. L. Murchie, J. W. Head
  1298

Sequence of Grooved Terrain Formation on Ganymede
S. L. Murchie, J. W. Head, P. Helfenstein, J. B. Plescia
  1299

Spinel-Perovskite Rims: Constraints on the Thermal Histories of Ca-Al Inclusions
M. T. Murrell, D. S. Burnett
  1300

Pursuit of Solar Nitrogen: Nitrogen Components in the Pesyanoe Meteorite
S. V. S. Murty, K. Marti
  1301

Deconvolution of Spectra for Intimate Mixtures
J. F. Mustard, C. M. Pieters, S. F. Pratt
  1302

Reduction Kinetics of Olivine and Oxygen Fugacity Environment during Chondrule Formation
H. Nagahara
  1303

Trace Element Concentrations in Microtektites from Barbados and Dsdp-Core from the Caribbean Sea and Gulf of Mexico
H. Nagasawa, T. Fukuoka, B. P. Glass
  1304

CE Anomaly in Chemically Separated Fractions of Sedimentary Rocks as an Indicator for Redox Environment: a Preliminary Study
H. Nagasawa, M. Kakiuchi, T. Fukuoka, K. Suwa
  1305

REE Abundances and Pb-Pb Isotopic Systematics of the Lunar Meteorite, YAMATO-82192
N. Nakamura, D. M. Unruh, M. Tatsumoto, T. Fujiwara
  1306

Solid Sulfur in Vacuum: Sublimation Effects on Surface Microtexture, Color, and Spectral Reflectance, and Applications to Planetary Surfaces
D. B. Nash
  1307

Cretaceous/tertiary Event: Geochemistry of Turkmenia K/t Sections
M. A. Nazarov, L. D. Barsukova, G. M. Kolesov, I. V. Nizhegorodova, A. S. Alekseev, K. N. Amanniyazov
  1308

Properties of Materials in the Interiors of Uranus and Neptune
W. J. Nellis, D. C. Hamilton, N. C. Holmes, A. C. Mitchell, H. B. Radousky, F. H. Ree, M. Ross, M. Nicol
  1309

The Role of Fluidization in the Emplacement and Alteration of the Suevite Impact Melt Deposit at the Ries Crater, West Germany
H. E. Newsom, G. Graup, T. Sewards, K. Keil
  1310

Titanium Isotopes in Chondrules and Other "separates" from Carbonaceous Chondrites
S. Niemeyer
  1311

Mass Spectrometric Study of the Mercury Isotopes in the Allende Meteorite: a Preliminary Investigation
A. O. Nier, D. J. Schlutter
  1312

Hot SPOT Tectonics on Venus: Implications for Rifting and Doming
A. M. Nikishin
  1313

The Statistics of Circular Features on the Plains of Venus
O. V. Nikolaeva, L. B. Ronca, A. T. Basilevsky
  1314

Depth Variation in Cosmogenic Radionuclide Production in Very Large Meteorites: Allende and DRP78002-9
K. Nishiizumi, D. Elmore, P. W. Kubik, J. R. Arnold
  1315

Age of Antarctic Meteorites and Ice II
K. Nishiizumi, D. Elmore, P. W. Kubik, G. Bonani, M. Suter, W. Wolfli, J. R. Arnold
  1316

Kinetic Studies of the Hydration of Amorphous Mg-Sio Smokes
J. A. Nuth, R. Nelson, B. Donn, R. K. Khanna
  1317

SR Isotopic Systematics of EETA 79001 Glass
L. Nyquist, H. Wiesmann, C.-Y. Shih, B. Bansal
  1318

Design Considerations for a Titan Aerosol Collector
V. R. Oberbeck, D. P. O'Hara, G. C. Carle
  1319

Preliminary Identification of Different Meteoroid Families Impacting the Lunar Surface
J. Oberst, Y. Nakamura
  1320

Eocene Microtektites and Clinopyroxene-Bearing Spherules
J. A. O'Keefe
  1321

Effect of Planetary Gravity and Impact Size on Crater Maximum Penetration and Excavation Depth
J. D. O'Keefe, T. J. Ahrens
  1322

Shapes of Asteroids from Radar
S. J. Ostro, R. Connelly
  1323

What can a Lightcurve Tell us about an Asteroid's Shape?
S. J. Ostro, R. Connelly
  1324

A Gas-Rich Fragment of the Allende Meteorite: "solar" and "planetary" Trapped Gases
R. L. Palma, D. Heymann
  1325

Trace Elements in Forsterite-Rich Inclusions in Allende
H. Palme, B. Spettel, I. M. Steele
  1326

A Pre-Phobos Assessment of the Composition of the Martian Moons Based on Viking, Mariner 9 and Groundbased Data
K. D. Pang, J. M. Ajello, J. I. Lunine, J. Wagner, B. Hapke, E. Wells
  1327

CR Isotopic Anomalies in FUN and Non-Fun Refractory Inclusions
D. A. Papanastassiou, G. J. Wasserburg
  1328

A New Ca-Al in Coarse-Grained Ca-Al Inclusions
J. M. Paque, J. R. Beckett, E. Stolper
  1329

Topography due to Horizontal Stresses in a Ductile Lithosphere of Variable Thickness: Application to Venus
E. M. Parmentier
  1330

Continental Crust Genesis on Earth: Need for Systematic nd Isotopic Study of Terrains 3.8 GA to Present
J. Patchett, N. Arndt
  1331

Terrace Width Variations in Complex Lunar Craters
S. J. Pearce, H. J. Melosh
  1332

The Origin of Ferrous Zoning in Allende Chondrule Olivines
J. A. Peck
  1333

Volatile Inventory of Mars
R. O. Pepin
  1334

Isostatic Uplift in Magmatic Systems: Application to the Tharsis Region of Mars
R. J. Phillips, A. A. Finnerty
  1335

Compositional Information for the Moon: Some Characteristics of Current Near-Ir Spectra (telescopic and Laboratory)
C. M. Pieters
  1336

Oxidized Basalts on the Surface of Venus: Compositional Implications of Measured Spectral Properties
C. M. Pieters, W. Patterson, S. Pratt, J. W. Head, J. Garvin
  1337

Mapping Geomorphic Provinces on Solid Planets: a Quantitative Example from Earth
R. J. Pike
  1338

Scale Dependence of Planetary Surface Slope is Curvilinear
R. J. Pike
  1339

Variance Spectra of Representative 1:62,500-SCALE Topographies: a Terrestrial Calibration for Planetary Roughness at 0.3 KM to 7.0 KM
R. J. Pike
  1340

Secular Change in South Polar Sedimentary Processes Inferred from the Morphologies and Ages of Layered and Pitted Terrain
J. Plaut, E. Guinness, R. Arvidson, R. Kahn
  1341

Tectonics of the Elysium Region, Mars
J. B. Plescia
  1342

Rare Gas Reservoirs and Earth Degassing
D. R. Porcelli, J. O. H. Stone, R. K. O'Nions
  1343

Further Observations of Sodium on Mercury
A. E. Potter, T. H. Morgan
  1344

Deposition and Erosion on Martian Cratered Terrains as Determined by Viking Orbiter Multispectral Image and Thermal Observations
M. Presley, R. Arvidson
  1345

ALHA84025: a Second Brachina-Like Meteorite
M. Prinz, M. K. Weisberg, C. E. Nehru, J. S. Delaney
  1346

North Haig and Nilpena: Paired Polymict Ureilites with Angra DOS Reis-Related and Other Clasts
M. Prinz, M. K. Weisberg, C. E. Nehru, J. S. Delaney
  1347

Mineralogical Studies of Ureilites: Minor Phases and Inclusions and Their Implications
M. Prinz, M. K. Weisberg, C. E. Nehru, J. S. Delaney, K. Yanai
  1348

Search for Correlated Isotope Effects in Allende Cais
C. A. Prombo, G. W. Lugmair
  1349

Dynamic Crystallization Experiments on a Pyroxene-Olivine Chondrule Composition
P. M. Radomsky, R. P. Turrin, R. H. Hewins
  1350

Crustal Block Model of the Tharsis Region, Mars
J. Raitala, R. S. Saunders
  1351

Origin of Compressional Lithospheric Stresses of the Tharsis Region, Mars
J. T. Raitala, R. S. Saunders
  1352

Fragments of Rock from a Probable Impact Ejecta Deposit in Ordovician Sediments of Northern Illinois
W. F. Read
  1353

Nuclide Production by Primary Galactic-Cosmic Protons
R. C. Reedy
  1354

Deformation, Transformation, and Thermal Annealing of Experimentally Shocked Single Crystal Quartz
A. Rehfeldt-Oskierski, D. Stoffler, U. Hornemann
  1355

First Results of a Petrographic Comparison of Pseudotachylite from Vredefort, Sudbury, and from Endogenic-Tectonic Settings
W. U. Reimold, B. O. Dressler, D. Tao
  1356

- General Witwatersrand Basin PHENOMENON!
W. U. Reimold, P. Fletcher, P. A. Snowden, J. D. Wilson
  1357

Textures of Experimentally Shocked (5.1-35.5 Gpa) Witwatersrand Quartzite
W. U. Reimold, F. Horz
  1358

Low Temperature Structures in the Iron Meteorite Dayton
K. B. Reuter, J. A. Kowalik, J. I. Goldstein
  1359

Layered Convection in Proto-Stellar Nebula: Implications for Planetary Formation and Titus-Bode Laws
A. Rice
  1360

Silica-Rich Glass and Trydimite in a Chondritic Porous Aggregate: Evidence for Stratospheric Contamination of Interplanetary Dust Particles
F. J. M. Rietmeijer
  1361

Fine-Grained Silicates in a Chondritic Interplanetary Dust Particle are Evidence for Annealing in the Early History of the Solar System
F. J. M. Rietmeijer, D. S. McKay
  1362

The Earth-Moon Connection
A. E. Ringwood
  1363

The Making of the Moon
A. E. Ringwood
  1364

A Method for Calculating the Non-Mass Isotopic Fractionation Factor
F. Robert
  1365

Digital Inventory of Martian Impact Craters, Ejecta Blankets and Selected Morphologic Parameters
D. J. Roddy, N. K. Robertson, C. L. Mardock
  1366

Analytical Simulation of a 10-KM-DIAMETER Asteroid Impact Into a Terrestrial Ocean: Part 1--SUMMARY
D. J. Roddy, S. Schuster, M. Rosenblatt, L. B. Grant, P. J. Hassig, K. N. Kregenhagen
  1367

A Morphological Catalogue of Lunar Craters: a Preliminary Study
Zh. F. Rodionova, V. V. Shevchenko, A. A. Karlov, T. F. Smolyakova
  1368

Tidal Heating in Viscoelastic Models of io and Europa
M. N. Ross, G. Schubert
  1369

Ground Patterns on Earth and Mars
L. A. Rossbacher
  1370

The G-Scale and Planetary Megageomorphology: how Big is it Really?
L. A. Rossbacher
  1371

Mars: Seasonally Variable Radar Reflectivity II
L. E. Roth, R. S. Saunders, G. S. Downs, G. Schubert
  1372

Carbonates on Mars: Searching the Mariner 6 and 7 IRS Measurements
T. L. Roush, D. Blaney, T. B. McCord, R. B. Singer
  1373

The Continuous Nebular Fractionation Sequence Within H-Group Chondrites
A. E. Rubin, G. W. Kallemeyn, J. T. Wasson
  1374

Primaevel Lunar Satellites
S. K. Runcorn
  1375

Analyses of Apollo 15 Green Glasses: Groupings and Their Spatial Relationships
G. Ryder
  1376

Apollo 15 Olivine-Normative Mare Basalts on the Apennine Front: Observations and Possible Interpretations
G. Ryder
  1377

The Volcanic and Local Origin of Apollo 15 KREEP Basalts
G. Ryder
  1378

Diversity of Impact Melt Compositions at the Apennine Front
G. Ryder, P. D. Spudis
  1379

Additional Basalts from Consortium Breccia 14321
P. A. Salpas, L. A. Taylor, M. M. Lindstrom
  1380

Apollo 17 Kreepy Basalts: Pristine Basaltic Breccias
P. A. Salpas, L. A. Taylor, M. M. Lindstrom
  1381

A Potpourri of Clasts from Apollo 14 Including Troctolite and Granite
P. A. Salpas, L. A. Taylor, M. M. Lindstrom
  1382

The First Apollo 17 Ferroan Anorthosite: its Significance Relative to Mg-Suite Highland Clasts
P. A. Salpas, L. A. Taylor, M. M. Lindstrom
  1383

Laboratory Heating of an Interplanetary Dust Particle: Comparisons with an Atmospheric Entry Model
S. A. Sandford
  1384

The World's Smallest Acid Residue: the Source of the 6.8 um Band Seen in Some IDP Spectra
S. A. Sandford
  1385

Io: Shield Volcanism, Tidally Forced Viscous Heating, and the Shift of Active Volcanism Eastward from the Sub-Jupiter and Anti-Jupiter Points
G. G. Schaber
  1386

Venera 15/16 and Arecibo Radar Images of Venus: Complementary Data Sets
G. G. Schaber, R. C. Kozak
  1387

Cleopatra Crater on Venus: New Evidence for a Volcanic Origin
G. G. Schaber, R. C. Kozak, H. Masursky
  1388

The Geometry of Furrows on Ganymede
P. M. Schenk, W. B. McKinnon
  1389

Experimental Investigation of Crater Formation Dynamics
R. M. Schmidt, C. R. Wauchope, H. E. Watson
  1390

Determination of Carbon Isotopes in Lunar Soil by Accelerator Mass Spectrometry
R. J. Schneider
  1391

Particles Associated with Impact Features in the Main Electronics Box (meb) Thermal Blanket from the Solar Max Satellite
L. S. Schramm, R. A. Barrett, M. L. Lieurance, D. S. McKay, S. J. Wentworth
  1392

Internal Electron Exchange Reactions in Synthetic Magmas
H. E. Schreiber
  1393

Oxygen Diffusion and Redox Kinetics in a Geochemical Melt System
H. D. Schreiber, S. J. Kozak, K. K. McManus
  1394

Early Changes in Gradation Styles and Rates on Mars
P. H. Schultz, D. Britt
  1395

Experimental Evidence for Non-Proportional Growth of Large Craters
P. H. Schultz, D. E. Gault
  1396

Impact Vaporization: Late-Time Phenomena from Experiments
P. H. Schultz, D. E. Gault
  1397

Momentum Transfer from Oblique Impacts
P. H. Schultz, D. E. Gault
  1398

Impacts of Hemispherical Granular Targets: Implications for Global Impacts
P. H. Schultz, D. E. Gault, D. Crawford
  1399

Chondritic Impact Melts and Cratering Processes on Asteroids
E. R. D. Scott, P. Maggiore, G. J. Taylor, K. Keil, D. Szuwalski
  1400

Experimental Regolith Evolution at High Impact Velocities
T. H. See, S. Smrekar, F. Cardenas, F. Horz, M. J. Cintala
  1401

Depletions of Chromium and Vanadium in the Lunar Mantle
S. Seifert, A. E. Ringwood
  1402

Characteristic Structures of the Highland Boundary on Mars: Evidence against a Single Mega-Impact Event?
A. M. Semeniuk, H. Frey
  1403

Rb-Sr Chronology of Two High-K Mare Basalt Clasts from Breccia 14304
C.-Y. Shih, B. M. Bansal, H. Wiesmann, E. J. Dasch, L. E. Nyquist
  1404

Elemental Analysis of Iron Meteorites by Glow Discharge Mass Spectrometer
T. Shimamura, H. Nagai, M. Honda
  1405

Connolly Basin: a Probable Eroded Impact Crater in Western Australia
E. M. Shoemaker, C. S. Shoemaker
  1406

Extinct Jupiter-Family Comets and Cratering Rates on the Galilean Satellites
E. M. Shoemaker, R. F. Wolfe, C. S. Shoemaker
  1407

Petrology of Luna 24 Grain Size Separates
S. B. Simon, J. J. Papike, D. C. Gosselin
  1408

Agglutinate Melting Mechanisms II: Shocked Lunar Soil Mixtures
S. B. Simon, J. J. Papike, F. Horz, T. H. See
  1409

73235,82 (pomegranate): an Assemblage of Lunar Zircon with Unique Overgrowth
J. M. Smith, C. Meyer, W. Compston, I. S. Williams
  1410

Separation Effects of Composition, Illumination Geometry, and Calibration in Viking 1 and 2 Multispectral Images
M. O. Smith, J. B. Adams, P. E. Johnson
  1411

Refined Strain Analysis and Magnetic Anisotropy Measurements for the Parnallee Chondrite
D. S. Sneyd, H. Y. McSween, N. B. Woodward, N. Sugiura, D. W. Strangway
  1412

Secular Cooling of the Earth as a Source of Intraplate Stress
S. C. Solomon
  1413

A Test of the Hypothesis that Impact-Induced Fractures are Preferred Sites for Later Tectonic Activity
S. C. Solomon, E. D. Duxbury
  1414

Volatile Determinations of Individual Fluid Inclusions Within the 3.4 B.Y. North Pole Barites from the Warrawoona Group, Northwestern Australia
M. A. Sommer, E. K. Gibson
  1415

Io's Present High Dissipation State may BE Stable: Results of a Coupled Orbital-Thermal Evolution Calculation
T. Spohn, H. J. Fischer
  1416

A Chemical and Petrological Model of the Lunar Crust
P. D. Spudis, P. A. Davis
  1417

Olivine in Extraterrestrial Samples: Observations Allowing Determination of Affinity of Single Olivine Grains
I. M. Steele
  1418

Contrasting Forsterite Compositions for C2, C3, and UOC Meteorites: Evidence for Divergence from Common Parent
I. M. Steele, J. V. Smith
  1419

The Mechanical Interaction of Comets with the Interstellar Medium
S. A. Stern
  1420

The SPARTAN and Champs Data - and Assessment
S. A. Stern, C. A. Barth
  1421

New Formulas for the Evolution of Planetesimal Velocities
G. R. Stewart, G. W. Wetherill
  1422

Cone Crater Consortium, Apollo 14: (2) Precursor Igneous Rocks and Ages of Polymict Breccias
D. Stoffler, S. Lingner, K. Heusser, E. K. Jessberger, H. Palme, B. Spettel, H. Wanke
  1423

Terrestrial Noble Gas Inventories and Early Earth History
J. O. H. Stone, D. R. Porcelli, R. K. O'Nions
  1424

Fault Tectonics of Terrestrial Planetary Bodies
N. Stovickova
  1425

Color/albedo Distribution of Soil and Rock Surfaces at the Viking 1 Landing Site
E. L. Strickland
  1426

Global Dust-Storm Fallout and Current Dust Accumulation in Low Thermal Inertia Regions on Mars: not Proven
E. L. Strickland
  1427

Properties of Surface Units of the Central Equatorial Region of Mars
E. L. Strickland
  1428

Are Comets Responsible for the Period of Heavy Bombardment?
R. G. Strom
  1429

On the Possible Transport of Volatile Trace Elements in Meteorite Parent Bodies
N. Sugiura, J. Arkani-Hamed, D. W. Strangway
  1430

Stability of Salt Hydrates in Martian Regolith
O. M. Suleimenov, M. Yu. Zolotov, I. L. Khodakovsky
  1431

Uranium, Thorium, and Potassium in the Venusian Rock at the Landing Sites of Vegas 1 and 2
Yu. A. Surkov, F. F. Kirnozov, V. N. Glazov, A. G. Dunchenko, L. P. Tatsy, O. P. Sobornov
  1432

Venus Rock Composition at the VEGA 2 Landing Site
Yu. A. Surkov, L. P. Moskalyova, V. P. Kharyukova, A. D. Dudin, G. G. Smirnov, S. Ye. Zaitseva
  1433

Water Vapor Content Profile in the Venusian Atmosphere According to the Results of Measurements from Vegas 1 and 2
Yu. A. Surkov, O. P. Shcheglov, M. L. Ryvkin
  1434

PIXE Trace Element Analyses of Metal, Troilite and Schreibersite in Iron Meteorites
S. R. Sutton, J. S. Delaney, J. V. Smith, M. Prinz
  1435

Collapse Structures in the Appenine Bench Formation and Their Influence on the Formation of Mozart and Hadley Rilles
G. A. Swann
  1436

I-Xe and 40AR-39AR Ages of Chainpur Chondrules
T. D. Swindle, M. W. Caffee, C. M. Hohenberg
  1437

Melting of Mafic and Felsic Sources to Produce the Hree-Depleted Dacites of the Michipicoten Greenstone Belt, Ontario
P. J. Sylvester, K. Attoh, K. J. Schulz
  1438

Mineralogical Studies of Augite-Bearing Clasts in Lunar Highland Regolith Breccia, 60019 and Lunar Meteorites
H. Takeda, M. Miyamoto, C. Galindo, T. Ishii
  1439

Mineralogy of Augite-Bearing Ureilites, and Some Hypotheses on the Origin of Ureilites
H. Takeda, O. Tachikawa, H. Toyoda
  1440

The Youngest Channel System on Mars
K. L. Tanaka, D. H. Scott
  1441

Water in Ancient Moon?: Possible Oxic Alteration of 14310
T. Tanaka, H. Shimizu, K. Shibata, A. Masuda
  1442

Valles - and Tectonics
K. L. Tanaka, N. E. Witbeck, D. H. Scott
  1443

VLT Basalts from Apollonious Region: Geochemical Identification
L. S. Tarasov, A. F. Kudryashova, V. B. Baryshev, G. N. Kulipanov, A. N. Skrinsky
  1444

Geochemistry of Incompatible Elements in Mineral-Rock Systems of Luna 24 Basalts
L. S. Tarasov, A. F. Kudryashova, A. S. Semenova, A. V. Ivanov, V. B. Baryshev, G. N. Kulipanov, A. N. Skrinsky
  1445

Lead Isotopes from Green Glass of an Apollo 15 Soil: a Search for Primitive Lunar Lead
M. Tatsumoto, W. R. Premo, D. M. Unruh
  1446

Viscous Flow in the System Albite-Diopside
P. Tauber, J. Arndt
  1447

Olivine/melt Fe/mg Kd's <0.3: Rapid Cooling of Olivine-Rich Chondrules
L. A. Taylor, E. H. Cirlin
  1448

Cutting the Gordian Knot: Lunar Compositions and Mars-Sized Impactors
S. R. Taylor
  1449

Micromanipulation of Extraterrestrial Particles
A. Teetsov, J. Bradley
  1450

Modeling of Pressure Ridge Formation on Compound Pahoehoe Lava Flows
E. Theilig, R. Greeley
  1451

10BE and 26AL Production from mg, al, si, and O by 600-MEV Protons in Granodiorite Spheres
S. Theis, P. Englert, R. Michel, D. Aylmer, G. F. Herzog, T. H. Kruse, R. K. Moniot, C. Tuniz, A. Jermakian, J. Klein, R. Middleton
  1452

The Effect of Variable Wavelength Ultraviolet Light on the Production of Oxygen Isotopic Anomalies
M. H. Thiemens, T. Jackson
  1453

Non-Newtonian Crater Relaxation in Ice
P. J. Thomas, G. Schubert
  1454

The Role of Alumina Polymorphs as Catalysts for Hydrocarbon Reactions in the Solar Nebula and Early Solar System
K. L. Thomas-Ver Ploeg, F. J. M. Rietmeijer
  1455

High Resolution Radar Map of the Moon
T. W. Thompson
  1456

Lunar and Venusian Radar Bright Rings
T. W. Thompson, R. S. Saunders
  1457

Phyllosilicates in the Mokoia CV3 Carbonaceous Chondrite: Petrographic and Transmission Electron Microscope Observations
K. Tomeoka, P. R. Buseck
  1458

Core Formation in the Shergottite Parent Body (spb)
A. H. Treiman, J. H. Jones, M. J. Drake
  1459

Capturing of Hypervelocity Particles
P. Tsou, D. E. Brownlee, A. L. Albee
  1460

A Fractal Approach to Planetary Spectra
D. L. Turcotte
  1461

Impact-Induced Devolatization of Murchison Carbonaceous Chondrite
J. A. Tyburczy, B. Frisch, T. J. Ahrens
  1462

Possible Point Source of Mantle Upwelling, Galileo Regio, Ganymede
J. R. Underwood, A. Woronow, R. Casacchia, M. J. Teeling
  1463

Fusing Lunar Materials with Microwave Energy. Part II: Melting of a Simulated Glassy Apollo 11 Soil
D. T. Vaniman, T. T. Meek, R. D. Blake
  1464

Continued Studies of Outer-Belt - CCD Reflectance Spectra
F. Vilas
  1465

Sulfur Cycle on Venus
V. P. Volkov
  1466

Cross-Strike on Maxwell Montes, Venus: Evidence for Large-Scale Strike-Slip Faulting
R. W. Vorder Bruegge, J. W. Head, D. B. Campbell
  1467

ALHA 77005 and on the Chemistry of the Shergotty Parent Body (mars)
H. Wanke, G. Dreibus, E. Jagoutz, H. Palme, B. Spettel, G. Weckwerth
  1468

Efremovka Fine-Grained Inclusion E14: Comparisons with Allende
D. A. Wark, A. S. Kornacki, W. V. Boynton, A. A. Ulyanov
  1469

Compositional Contrast Between Martian Regolith and SNC Meteorites: Evidence for Buried Massive Carbonates?
P. H. Warren
  1470

"new" Nonmare Rocks from Apollo 12 and 17: Still Few Ferroan Anorthosites
P. H. Warren, E. A. Jerde, G. W. Kallemeyn
  1471

A Nonmagmatic Origin of Group-Iie Iron Meteorites
J. T. Wasson, J. Wang
  1472

Strain Estimates for Basalt Plains Ridges on Mars, Earth, and the Moon
T. R. Watters, T. A. Maxwell
  1473

Oblique Impacts: Ejecta Mass and Velocity Distributions
S. J. Weidenschilling, D. R. Davis
  1474

Barred Olivine Chondrules in Ordinary Chondrules: Petrologic Constraints and Implications
M. K. Weisberg
  1475

Dynamics of Cometary Showers
P. Weissman, P. Hut
  1476

Grain Size and Petrographic Analysis of Disaggregated Apollo 15 and 16 Regolith Breccias
S. J. Wentworth, D. S. McKay
  1477

The Early Stages of Planetesimal Accumulation
G. W. Wetherill, G. R. Stewart
  1478

The Geology of the Lunar Mare Fecunditatis
J. L. Whitford-Stark
  1479

Timing of Ancient Extensional Tectonic Features on Mars
R. Wichman, P. H. Schultz
  1480

Laboratory Shock Emplacement of Nitrogen and Noble Gases Into Basalt
R. C. Wiens, R. O. Pepin
  1481

Lava-Ice Interactions on Mars
D. E. Wilhelms
  1482

Relation Between Gullying and Crater Degradation in the Martian Uplands
D. E. Wilhelms, R. J. Baldwin
  1483

Areas of Gullied Terrain and Possible Volcanic Deposits in the Martian Uplands
D. E. Wilhelms, C. J. Hayden
  1484

Wind Erosion on Mars: Impairment by Poor Saltation Cloud Development
S. H. Williams, R. Greeley
  1485

Salt Tectonics on Venus
C. A. Wood, D. L. Amsbury
  1486

High Temperatures and Chondrule Formation in a Turbulent Shear Zone Beneath the Nebula Surface
J. A. Wood
  1487

Fusing Lunar Materials with Microwave Energy. Part i: Studies of Doping Media
R. A. Wright, F. H. Cocks, D. T. Vaniman, R. D. Blake, T. T. Meek
  1488

Burkhala: a New Anomalous Iron Meteorite
N. I. Zaslavskaya, L. F. Migdisova, N. N. Kononkova
  1489

Adsorption of H2O and CO2 on Mauna Kea Palagonites
A. P. Zent, F. P. Fanale
  1490

Spatial Resolution and the Geologic Interpretation of Martian Morphology
J. R. Zimbelman
  1491

Comparisons Between High Resolution Thermal Inertias and Mars Consortium Data for the Elysium and Aeolis Quadrangles of Mars
J. R. Zimbelman, L. A. Leshin
  1492

Heavy Carbon in Individual Oxide Grains from Murchison Acid Residue Cfoc
E. Zinner, S. Epstein
  1493

Stratospheric Particle Abundance and Variations Over the Last Decade
M. E. Zolensky, L. Kaczor
  1494

Oxidation of Iron-Bearing Silicates on Venus Surface
M. Yu. Zolotov
  1495

Venus Weathering Crust: Structure and Development
M. Yu. Zolotov
  1496

Nitrates in Martian Soil?
M. Yu. Zolotov, Yu. I. Sidorov
  1497

On the Asteroidal Component of Cosmic Dust
H. A. Zook, D. S. McKay
  1498

A Dynamic Model for Ridge Belts on Venus and Constraints on Lithospheric Structure
M. T. Zuber
  1499

Asteroid Dynamical Families: Mostly Mythical?
J. F. Bell
  1500

Mineralogical Evolution of Meteorite Parent Bodies
J. F. Bell
  1501

Neutron Activation Analysis of Iridium and Other Elements (cr, fe, ni, sc, Co) in Individual Cosmic Spherules from the Melt Zone of the Greenland Ice CAP
Ph. Bonte, C. Jehanno, M. Maurette
  1502

A Test of Solar System Abundance Smoothness
D. S. Burnett, D. S. Woolum, T. M. Benjamin, P. S. Z. Rogers, C. J. Duffy, C. J. Maggiore
  1503

Ice Lenses on Mars
F. Costard, A. Dollfus
  1504

Physics of the Martian Soil by Optical Polarimetry and Thermal Measurements
A. Dollfus, M. Deschamps
  1505

Carbon and Nitrogen Isotopic Variations in the Organic Matter of CM2 Carbonaceous Chondrites
I. Gilmour, I. P. Wright, C. T. Pillinger
  1506

Progress in Diamond Cell Experiments: Pressures above Three Megabars
K. A. Goettel, W. C. Moss, R. Reichlin, S. Martin
  1507

Spectral Reflectance Studies of TYCHO Crater: Preliminary Results
B. R. Hawke, P. G. Lucey, J. F. Bell, R. Jaumann, G. Neukum
  1508

Cosmogenic Helium in Terrestrial Basalts
M. D. Kurz
  1509

An Improved "fractal" Characterization of Projectile Impact Microcraters. Preliminary Implications to Micrometeorites
M. Maurette, D. E. Passoja, D. Maas, M. Laurence
  1510

The Size Distributions of Fragments Ejected at a Given Velocity from Impact Craters
J. D. O'Keefe, T. J. Ahrens
  1511

An Iridium Anomaly in the Middle Jurassic of the Venetian Region, Northern Italy
R. Rocchia, D. Boclet, A. Castellarin, C. Jehanno
  1512

Collisional Evolution of Rotating Particles: Application to Saturn's Rings
H. Salo
  1513

Mercury's Magnetic Field Revisited: a New Model
D. J. Stevenson
  1514

The Uranus-Neptune Dichotomy: the Role of Giant Impacts
D. J. Stevenson
  1515

Interplanetary Dust: Arguments in Favour of a Late Stage Nebular Origin of the Chondritic Aggregates
C. C. A. H. van der Stap, R. D. Vis, H. Verheul
  1516

Pioneer Venus Radar Characteristics of the Parquet Terrain
D. L. Bindschadler, J. W. Head
  1517

Caldera Structure on IO
L. S. Crumpler
  1518

Cross-Strike Discontinuities in Western Aphrodite Terra, Venus
L. S. Crumpler, J. W. Head, D. B. Campbell
  1519

Evidence for Large-Scale Horizontal Motions in Northwest Ishtar Terra, Venus
L. S. Crumpler, J. W. Head, D. B. Campbell
  1520

Pioneer Venus Characteristics of Ovoids on Venus: Preliminary Results
E. R. Stofan, J. W. Head
  1521

Beta Regio Rift Zone, Venus: Analysis of Arecibo and Venera Data
E. R. Stofan, J. W. Head, D. B. Campbell, S. H. Zisk, A. F. Bogomolov, O. N. Rzhiga, A. T. Basilevsky
  1522