Lunar and Planetary Institute






23st Lunar and Planetary Science Conference

TABLE OF CONTENTS

no.

Electrolytic Production of Lunar Iron and Oxygen at Room Temperature
W. N. Agosto
  1001

Impact Release of Noble Gases from the Murchison Meteorite
T. J. Ahrens, L. Rowan, W. Yang, R. H. Becker, R. O. Pepin
  1002

Al26, Be10, and Ca41 in Mesosiderites
A. Albrecht, S. Vogt, G. F. Herzog, R. Middleton, B. Dezfouly-Arjomandy, D. Fink, J. Klein
  1003

Studies of Antarctic Micrometeorites
C. M. O'd. Alexander, M. Maurette, P. Swan, R. M. Walker
  1004

Continued In Situ Studies of Interstellar Grains in Primitive Meteorites
C. M. O'd. Alexander, P. D. Swan, R. M. Walker
  1005

Occultation of the Star SAO 187255 by Titan: Titan's Atmosphere
Yu. V. Alexandrov, F. P. Velichko, V. V. Korokhin, Ju. N. Krugly, V. G. Shevchenko
  1006

Are There any Clusterings of the Cosmic-Ray Exposure Ages of L Chondrites?
V. A. Alexeev
  1007

Exposure Ages of L and LL Chondrites
V. A. Alexeev
  1008

Is There the Clustering of Cosmic-Ray Exposure Ages of H Chondrites at 30 Myr?
V. A. Alexeev
  1009

Sintering of Lunar Simulant Basalt
C. C. Allen, J. A. Hines, D. A. Altemir, D. S. McKay
  1010

Hydrogen Reduction of Lunar Simulant Glass
C. C. Allen, D. S. McKay, R. V. Morris
  1011

Computer Games Geologists Play: A Tool for Determining Appropriate Rover Autonomy
J. H. Allton, D. M. Lyons
  1012

SIMS Chemical Analysis of Extended Impacts on the Leading and Trailing Edges of LDEF Experiment A0187-2
S. Amari, J. Foote, C. Simon, P. Swan, R. M. Walker, E. Zinner, E. K. Jessberger, G. Lange, F. Stadermann
  1013

Interstellar SiC with Unusual Isotopic Compositions
S. Amari, P. Hoppe, E. Zinner, R. S. Lewis
  1014

The Partitioning of CO and NI in a Simple Metal/Silicate System as a Function of Oxygen Fugacity and Temperature
A. A. Amelin, C. J. Capobianco
  1015

First Results from the Manson Impact Structure Core-Drilling Project: Preliminary Observations and Interpretations from the M-1 Core
R. R. Anderson, J. B. Hartung, M. K. Reagan, M. S. Bell, O. Plocher
  1016

Metallic Iron in Lunar Sample 79002, 2030
I. Antonenko
  1017

Simulating Iron-Melt Equilibrium for Silicate Systems
A. A. Ariskin, A. A. Borisov, G. S. Barmina
  1018

Evidence for Ni-Pt-Ge-Te-rich `Opaque Assemblages' in CV3 CAI Being True Fremdlinge and Not Low Temperature Alteration
J. T. Armstrong
  1019

Surface Modification of Venus as Inferred from Magellan Observations of Plains and Tesserae
R. E. Arvidson, R. Greeley, M. Malin, R. S. Saunders, N. Izenberg, J. J. Plaut, E. Stofan
  1020

Carbon and Nitrogen Isotopes in CR Chondrites; Evidence for a Single Parent Body?
R. D. Ash, C. T. Pillinger
  1021

Analytical and Numerical Predictions for Regolith Production on Asteroids
E. Asphaug, M. C. Nolan
  1022

Theoretical Predictions for Fragment Size Distributions
E. Asphaug, H. J. Melosh, E. Ryan
  1023

Fields of Small Volcanoes on Venus (Shield Fields): Characteristics and Implications
J. C. Aubele, J. W. Head, L. S. Crumpler, J. E. Guest, R. S. Saunders
  1024

Multi-Scale Roughness Spectra of Volcanic Debris Flows
R. T. Austin, A. W. England
  1025

Shocked Rock Fragments from K/T Boundary Clay and Their Relevance to the Kara Impact Event
D. D. Badjukov, M. A. Nazarov, E. V. Guseva
  1026

Spatial and Temporal Relations Between Coronae and Extensional Belts, Northern Lada Terra
G. Baer, G. Schubert, D. L. Bindschadler, E. R. Stofan
  1027

Venusian Valleys and Channels
V. R. Baker, G. Komatsu, V. C. Gulick, J. S. Kargel
  1028

The Character of Lava Flow Margins
S. M. Baloga, G. J. Taylor, B. C. Bruno
  1029

Parallel Fracture Patterns on the Plains of Venus
W. B. Banerdt, C. G. Sammis
  1030

Quantifying Crater Degradation in Maja Valles and Memnonia, Mars
N. G. Barlow
  1031

A Continuum Model for Atmospheric Response to an Advancing Ejecta Curtain
O. S. Barnouin, P. H. Schultz
  1032

Venera 9, 10 and 13 Landing Sites as Seen by Magellan
A. T. Basilevsky, C. M. Weitz
  1033

The Project of 1:1,000,000-Scale Geologic Mapping of Venera and VEGA Landing Sites, Venus
A. T. Basilevsky, G. A. Burba, N. N. Bobina
  1034

Preliminary Results of a Petrographic Investigation of Apollo 16 Core 60014
A. Basu, S. J. Wentworth, D. S. McKay
  1035

Venus: Improved North Pole Position from Venera-15, 16 Radar Survey
E. G. Belinkiy
  1036

Spatial Variability of CO and CO2 on Mars from Near-Infrared Imaging Spectroscopy
J. F. Bell III, D. Crisp
  1037

Composition and Stratigraphy of the Plinius-Dawes Region of the Moon
J. F. Bell III, B. R. Hawke
  1038

Ferric Mineralogy of the Martian South Polar Region
J. F. Bell III, P. G. Lucey, T. B. McCord
  1039

Relative Abundances of Poorly-and Well-Crystalline Ferric Oxides in the Martian Soil and Dust from Telescopic Data and Terrestrial Spectral Analog Studies
J. F. Bell III, R. V. Morris, J. B. Adams
  1040

The Galileo SSI Experiment at Gaspra: Overview and Expectations
M. J. S. Belton, J. Veverka, P. C. Thomas, C. R. Chapman, K. P. Klaasen, G. Neukum, A. S. McEwen, J. W. Head, M. Davies, R. Greeley, R. Greenberg, C. B. Pilcher, D. Morrison, A. P. Ingersoll, F. Fanale, T. V. Johnson
  1041

The Break-up of the H Chondrite Parent Body and the Delivery of Fragments to Earth
P. H. Benoit, D. W. G. Sears
  1042

Metallographic Cooling Rate Differences Between Antarctic and Non-Antarctic H5 Chondrites and Some Implications
P. H. Benoit, D. W. G. Sears
  1043

Natural Thermoluminescence and Terrestrial Ages of Meteorites: Age Clustering in the Saharan Collection
P. H. Benoit, D. W. G. Sears, S. W. S. McKeever
  1044

TEM Studies of a Circumstellar Rock
T. J. Bernatowicz, S. Amari, R. S. Lewis
  1045

Compositional Variety of Particles Encountered by LDEF's Trailing Edge
R. Bernhard, F. Hoerz
  1046

Preliminary Analysis of LDEF Instrument AO187-1, Location A11
R. Bernhard, W. Davidson, F. Hoerz
  1047

Martian vs. Terrestrial Volcanism: Are Partial Melt Properties Influential?
C. M. Bertka
  1048

Venus: Satellite Orbital Decay and Consequent Crater Production
B. G. Bills
  1049

Planetary Distribution and Nature of Compressional Deformation Around Artemis Corona, Venus
F. Bilotti, J. Suppe
  1050

Tellus Regio, Venus: Preliminary Magellan Observations of a Region of Complex Ridged Terrain
D. L. Bindschadler, M. J. Tatsumura
  1051

Mineralogy and Chemistry of the EL-Chondritic Melt Rock Ilafegh-009
A. Bischoff, H. Palme, T. Geiger, B. Spettel
  1052

New Type 3 Ordinary Chondrites from the Sahara Desert
A. Bischoff, D. W. G. Sears, P. H. Benoit, T. Geiger, D. Stoeffler
  1053

Strength of IR Hydration Bands: Application to the Martian Surface
J. L. Bishop, C. M. Pieters
  1054

Ferrihydrite Found in Fe-rich Montmorillonite and Its Relationship to the Reflectance Spectra of Mars
J. L. Bishop, C. M. Pieters, R. G. Burns
  1055

Uranium Series and Oxygen Isotope Studies of the Peralkaline Rhyolites of Naivasha, Kenya Rift Valley
S. Black, R. MacDonald, M. Kelly, A. E. Fallick
  1056

Sequential Analyses of IDPs by LVSEM, TOF-SIMS, SIMS, and AEM
D. F. Blake, R. H. Fleming
  1057

Design of an X-Ray Diffraction/X-Ray Fluorescence Instrument for Planetary Applications
D. F. Blake, C. Bryson, F. Freund
  1058

A New Ureilite from the Sahara--Acfer 277
P. A. Bland, C. T. Pillinger, R. Hutchison
  1059

Does Adsorbed Carbon Dioxide Contribute to the Infrared Spectrum of Mars?
D. L. Blaney
  1060

A Near-IR Spectral Investigation of the Schiller-Schickard Region of the Moon
D. T. Blewett, B. R. Hawke, P. G. Lucey, J. F. Bell, J. F. Bell III, G. J. Taylor, C. A. Peterson, P. D. Spudis
  1061

Influence of Surface Roughness on Windblown Sand: Earth, Mars, and Venus
D. G. Blumberg, R. Greeley
  1062

Lithic Clasts in Elephant Moraine 87521 Sample Two VLT Fractionation Series
J. S. Boesenberg, J. S. Delaney
  1063

Some History and Characteristics of NASA's Planetary Materials and Geochemistry Program
D. D. Bogard
  1064

39Ar-40Ar Ages of Howardite Clasts: Additional Evidence for Early HED Parent Body Bombardment
D. D. Bogard, D. H. Garrison
  1065

The Age of Copernicus: New Evidence for 800+15 Million Years
D. D. Bogard, D. H. Garrison, D. S. McKay, S. J. Wentworth
  1066

Ejection and Dispersal Mechanisms of the K/T Impact
B. F. Bohor, W. J. Betterton
  1067

No Evidence of Shock Metamorphism in Cuba at K/T Boundary
B. F. Bohor, R. Brett, R. A. F. Grieve, D. Stoeffler
  1068

The Origin of Highly Siderophile Elements in the Upper Mantle of the Earth: an Experimental Approach
A. Borisov, H. Palme, A. Holzheid, B. Spettel, D. B. Dingwell, H. St. C. O'Neil
  1069

Thermal Structure of the Solar Nebula
A. P. Boss
  1070

Computer Modeling of Aqueous Alteration on Carbonaceous Chondrite Parent Bodies
W. L. Bourcier, M. E. Zolensky
  1071

The Canteloupe Terrain of Triton
J. M. Boyce, P. G. Rogers
  1072

The Trace-Element Composition of LEW 88516 and Its Relationship to SNC Meteorites
W. V. Boynton, D. H. Hill, D. A. Kring
  1073

Pressure Attenuation in Impacts Determined Using a Finite Shell Model: Implications for Melt and Vapor Scaling
R. A. Brackett, W. B. McKinnon
  1074

Interplanetary Dust Analogues for Infrared Silicate Emission from Comets
J. P. Bradley, H. J. Humecki, M. S. German
  1075

Mineralogy of Fine-Grained Matrix in the Ivuna CI Carbonaceous Chondrite
A. J. Brearley
  1076

Phyllosilicates in the Matrix of the Unusual Carbonaceous Chondrite, LEW 85332 and Possible Affinities to CI Chondrites
A. J. Brearley
  1077

Anhydrite: A Lethal Target Rock at the Chicxulub Impact Site
R. Brett
  1078

Aspect Ratios of Lava Domes on the Earth, Moon and Venus
N. T. Bridges, J. H. Fink
  1079

Spectral Variation Within Asteroid Classes
D. T. Britt, L. A. Lebofsky
  1080

The Bidirectional Reflectance Spectrum of the ACFER 111 Regolith Breccia
D. T. Britt, A. Pedroni
  1081

Bidirectional Reflectance Spectra of Five Antarctic Light-Dark Ordinary Chondrites
D. T. Britt, C. M. Pieters
  1082

The Reflectance Spectrum of Troilite
D. T. Britt, J. F. Bell, H. Haack, E. R. D. Scott
  1083

Simulation Experiments for Planetary Gamma-Ray Spectroscopy by Means of Thick Target High-Energy Proton Irradiations
J. Bruckner, U. Fabian, A. Patnaik, H. Waenke, P. Cloth, G. Dagge, V. Druke, D. Filges, P. A. J. Englert, D. M. Drake, R. C. Reedy, B. Parlier
  1084

Fractal Analysis: A New Remote Sensing Tool for Lava Flows
B. C. Bruno, G. J. Taylor, S. K. Rowland, P. G. Lucey, S. Self
  1085

Matrix Pyroxenes in Howardites and Polymict Eucrites
P. C. Buchanan, A. M. Reid
  1086

Modeling the Volcanic Resurfacing of Venus
M. A. Bullock, D. H. Grinspoon, J. W. Head
  1087

Calderas on Venus
M. H. Bulmer, J. E. Guest, E. R. Stofan
  1088

A Study of the Rio Cuarto Loess Impactites and Chondritic Impactor
T. E. Bunch, P. H. Schultz
  1089

Transylvanian Ring Structure, Romania: Definition, Description, Possible Planetary Analogues
G. A. Burba
  1090

Topographic Comparison of Coronae on Venus and Transylvanian Ring Structure on the Earth
G. A. Burba, V. P. Shashkina
  1091

Studies of the Diffusion Properties of the I-Xe System in Bjurbole
M. K. Burkland, T. D. Swindle
  1092

Chemical Weathering on Mars: Rates of Dissolution and Oxidation of Ferromagnesian Silicate Minerals
R. G. Burns
  1093

Thermal Buoyancy on Venus: Underthrusting vs. Subduction
J. D. Burt, J. W. Head
  1094

A Comparison of the Radar Returns from the Icy Poles and Other Regions of Mars and Mercury
B. Butler, D. O. Muhleman, M. Slade
  1095

Exotic Nickel-Chromites in Impact Spherules from the Archean Barberton Greenstone Belt
G. R. Byerly, D. R. Lowe
  1096

Recurrent Rules in Martian Channel Organization: Implication for Their Formation
N. A. Cabrol, E. A. Grin
  1097

Sites of Residual Aquifers on Mars Through Channel Analysis
N. A. Cabrol, E. A. Grin
  1098

The Giant Impact Revisited
A. G. W. Cameron
  1099

Comparison of Magellan Measurements of Surface Roughness on Venus to Topographic Profiles of Terrestrial Basaltic Lava Flows
B. A. Campbell
  1100

Magellan Observations of Extended Impact Crater Related Deposits on the Surface of Venus
D. B. Campbell, N. J. S. Stacy, W. Newman, R. E. Arvidson
  1101

Post-Noachian Erosion Rates: Implications for Mars Climate Change
M. H. Carr
  1102

Thermal Models of the Primitive Solar Nebula
P. Cassen
  1103

Martian Volcanoes and Ground-Ice: Evidence for the Localised Enrichment of Sub-Surface Ice by Juvenile Volatiles
J. A. Cave
  1104

Fault Dips in the Valles Marineris: A Photogrammetric Study
D. J. Chadwick, B. K. Lucchitta, P. Morgan
  1105

Bright Crater Outflows on Venus
D. J. Chadwick, G. G. Schaber, H. J. Moore, R. G. Strom
  1106

Experimental Determination of Oxide Activities in Synthetic CAI and POI Melts
L. Chamberlin, J. R. Beckett, E. M. Stolper
  1107

Bulk Compositional Confirmation of the First EL3 Chondrite and Some Implications
Y. Chang, P. H. Benoit, D. W. G. Sears
  1108

951 Gaspra: Preliminary Galileo SSI Results on Craters, Collisions, and Regolith
C. R. Chapman, D. R. Davis, G. Neukum, J. Veverka, M. J. S. Belton, T. V. Johnson, D. Morrison, A. McEwen
  1109

Geologic Mapping of the Granicus Valles, Mars
M. G. Chapman
  1110

Th and U in Some Chondrites
J. H. Chen, G. J. Wasserburg, D. A. Papanastassiou
  1111

Image Processing Data Products for the Magellan Mission
J. Clark, D. Alexander, P. Andres, C. Stanley
  1112

Using Geochemical Profiles of Recent Impact Features in Northeastern Tranquillitatis to Characterize Mare/Highland Interfaces
P. E. Clark, S. Joerg
  1113

New Ideas for SiC: MG Burning in AGB Shell Flashes
D. D. Clayton, L. E. Brown
  1114

Oxygen Isotope Relationships Among Primitive Achondrites
R. N. Clayton, T. K. Mayeda, H. Nagahara
  1115

Analysis of Polycyclic Aromatic Hydrocarbons in Seventeen Ordinary and Carbonaceous Chondrites
S. J. Clemett, C. R. Maechling, R. N. Zare, C. M. Alexander
  1116

Inferring REE Substitution Reactions in Lunar Whitlockite
R. O. Colson, B. L. Jolliff, L. A. Haskin
  1117

Formation of Narrow Planetary Rings by Satellite Disruption
J. E. Colwell, L. W. Esposito
  1118

Chondrule Modifications as a Possible Indicator of Rim-forming Mechanisms
H. C. Connolly Jr., R. H. Hewins
  1119

The Experimental Production of Accretionary Rims Around Isolated Olivine Grains
H. C. Connolly Jr., R. H. Hewins
  1120

The Production of Accretionary Rims Arounds Chondrules by Drop Quenching into Dust: A Test for Parent Body Origin
H. C. Connolly Jr., R. H. Hewins
  1121

Damage Areas on LDEF Aluminum Panels: Preliminary Results
C. R. Coombs, D. R. Atkinson, J. D. Wagner, M. Allbrooks
  1122

Environment Modelling in Near-Earth Space: Preliminary LDEF Results
C. R. Coombs, D. R. Atkinson, J. D. Wagner, L. B. Crowell, M. Allbrooks, A. J. Watts
  1123

Pyroclastic Deposits on the Northwestern Limb of the Moon
C. R. Coombs, B. R. Hawke, M. S. Robinson
  1124

Apollo 17 Lunar Sounder: Evidence for Graben Structure in the Procellarum Basin?
B. L. Cooper
  1125

Mars Rover Mission: The French Views
F. M. Costard, J. Achache, J. P. Bibring, M. Blanc, S. Coutin-Faye, Y. Langevin, P. Lognonne, P. Masson, D. Moura, F. Rocard
  1126

Morphologic Variations of Degraded Impact Craters in the Martian Highlands
R. A. Craddock, T. A. Maxwell
  1127

Central Chryse Plaintia, Mars: Geologic Unit Interpretation from 1:500,000-scale Mapping
R. A. Craddock, L. S. Crumpler, J. C. Aubele
  1128

Experimental Investigations of Impact-generated Magnetic Fields
D. A. Crawford, P. H. Schultz
  1129

The Production and Evolution of Magnetic Fields During Hypervelocity Impacts
D. A. Crawford, P. H. Schultz
  1130

Re-Os Isotope Study of Iron Meteorites Using Negative Thermal Ion Mass Spectrometry
R. A. Creaser, D. A. Papanastassiou, G. J. Wasserburg
  1131

The Influence of Crystallization and Entrainment on the Emplacement of Lava Flows
J. Crisp, S. Baloga
  1132

Aspects of Tectonics on Icy Satellites
S. K. Croft
  1133

Observational Limits on Catastrophic Disruption
S. K. Croft
  1134

Gravito-Magnetic Orbits for Micron Sized Particles
L. B. Crowell
  1135

Spacetime Geodesy by Neural Networks
L. B. Crowell
  1136

Two Global Concentrations of Volcanism on Venus: Geologic Associations and Implications for Global Pattern of Upwelling and Downwelling
L. S. Crumpler, J. C. Aubele
  1137

Venus Volcanism: Global Distribution and Classification from Magellan Data
L. S. Crumpler, J. W. Head, J. C. Aubele, J. Guest, R. S. Saunders
  1138

Venus' Rotation Period and Pole Direction
M. E. Davies, T. R. Colvin, P. G. Rogers, P. W. Chodas, W. L. Sjogren
  1139

Melilite Composition Trends During Crystallization of Allende Type B1 Refractory Inclusion Melts
A. M. Davis, S. B. Simon, L. Grossman
  1140

Asteroid Collision Frequencies: Variations in Space and Time
D. R. Davis, P. Farinella, M. Carpino
  1141

Missions to Near-Earth Asteroids: SEI Milestones on the Way to Mars
D. R. Davis, A. L. Friedlander, T. Jones, J. V. McAdams
  1142

Preliminary Results of Computer Modeled Near deg C Water-Rock Interactions at the Martian Surface
J. D. Debraal, M. H. Reed, G. S. Plumlee
  1143

Complex Ridged Terrain at Phobe Regio, Venus from Magellan Data
A. V. Decharon, E. R. Stofan
  1144

Reflectance Geometric Corrections for a Global Spectral Mapping of Mars from Telescopic Near-Infrared Observations
M. de Grenier, P. C. Pinet, S. D. Chevrel
  1145

Annealing Studies of Type A Chondrule Analogs
J. M. Dehart, G. E. Lofgren
  1146

TEM and Cathodoluminescence Spectroscopic Studies of Type A Chondrule Mesostases
J. M. Dehart, L. Keller, W. Protheroe, G. E. Lofgren
  1147

Duration and Rates of Discharge Through a Martian Outflow System: Maja Valles
R. A. de Hon, E. A. Pani
  1148

In Situ Micro XANES Determination of Ferrous/Ferric Ration in Terrestrial and Extraterrestrial Plagioclase: First Reconnaissance
J. S. Delaney, S. R. Sutton, S. Bajt, J. V. Smith
  1149

Australite Flanges as Flight Data Recorders
J. W. Delano
  1150

Major-Element Compositions of Glasses in Apollo 16 Cores 60014 (Station 10) and 64001 (Station 4)
J. W. Delano
  1151

Geochemistry and Origin of Moldavite Tektites
J. W. Delano, Y.-G. Liu, R. A. Schmitt, V. Bouska
  1152

Melting Relations for Indarch (EH4) Under Reducing Conditions
T. L. Dickinson, G. E. Lofgren
  1153

High Temperature Reduction of Silicon in Enstatite Meteorites: Evidence from the Experimental Studies of Indarch
T. L. Dickinson, G. E. Lofgren, I. Casanova
  1154

The Coefficient of Restitution for Collisions of Icy Spheres
J. Dilley
  1155

Martian Surface Texture and Wind Effect Implications
A. Dollfus, J. R. Zimbelman
  1156

Experimental Simulations of Martian Neutron Spectra
D. M. Drake, M. Drosg, R. C. Byrd, R. C. Reedy, D. A. Clark, P. A. J. Englert
  1157

Mercury's Impact-induced Self-Destruction and Early Impact History of Inner Planets
E. M. Drobyshevski
  1158

Numerical Experiments on the Chemical Differentiation of a Convecting Plantary Interior: Possible Application to Venus
L. Dupeyrat, C. Sotin, E. M. Parmentier
  1159

Impact Crater Flows on Venus: Morphological Evidence for Complex Ejection Dynamics
D. M. Duval, C. A. Wood
  1160

2-Dimensional Modeling of the Cometary Phase Transition Within a Range of Temperatures
N. S. Duxbury
  1161

The Windblown Sands of Mars: Estimation of the Amount of Sand in Dark Intracrater Deposits
K. S. Edgett, P. R. Christensen
  1162

Mars: The Composition of Dunes and Other Dark Surficial Material
K. S. Edgett, P. E. Geissler, K. E. Herkenhoff
  1163

Characterization of Ejecta Facies Around Large Venusian Craters: Implications for the Origin of Flow-like Ejecta
M. S. Edmunds, V. L. Sharpton
  1164

53Cr-53 MN Systematics of Mn-bearing Sulfides in Four Enstatite Chondrites
A. El Goresy, M. Wadhwa, H.-J. Nagel, E. K. Zinner, J. Janicke, G. Crozaz
  1165

Can Secondary Ion Mass Spectrometry Resolve Variations in Lunar Surface Composition?
R. C. Elphic, H. O. Funsten III, B. L. Barraclough, D. J. McComas
  1166

Aerosol Contribution to the Reflectance Spectra of Mars
S. Erard, P. Drossart, J.-P. Bibring, Y. Langevin, P. Pinet, S. Chevrel
  1167

Near-Infrared Spectral Slope as a Clue to Aerosol Vertical Distribution on Mars
S. Erard, P. Drossart, J.-P. Bibring, J. Rosenqvist, E. Chassefiere
  1168

Disturbed Re-Os Isotope Systematics in IIIAB Iron Meteorites
T. M. East, V. Bennett
  1169

Lunar Regolith Residence Time of Apollo-16 Dimict Breccias
O. Eugster
  1170

History of 27 Chinese and 10 Other Chondrites Derived from Solar, Cosmic-Ray Produced, Radiogenic and Fissiongenic Noble Gases
O. Eugster, Th. Michel, S. Niedermann, D. Wang, W. Yi
  1171

BAR Plot Analysis of S Type Asteroid and Ordinary Chondrite Reflectances Spectra
F. P. Fanale, B. E. Clark
  1172

Lunar Volcanic Gases: The Predicted Presence of Chlorofluorocarbon Gases
B. Fegley Jr.
  1173

Crystallization Temperature of Melt Impact Rocks of Zhamanshin Astrobleme, (USSR)
V. I. Feldman, L. V. Sazonova, N. N. Korotaeva
  1174

Diaplectic Transformation of Minerals in Vorotilov Core, Puchezh-Katunk Astrobleme, Russia (Preliminary Data)
V. I. Feldman, L. V. Sazonova, N. N. Korotaeva, L. B. Guseva, G. K. Budkov
  1175

Experimental Mapping of the V36 Quadrangle of Venus, Based on Magellan Data
N. Fienen, G. G. Schaber, K. L. Tanaka
  1176

41Ca in the Norton County Aubrite
D. Fink, J. Klein, B. Dezfouly-Arjomandy, R. Middleton, G. F. Herzog, A. Albrecht
  1177

Venus and Earth: Morphostructural Comparison and Endogenetic Implications
V. J. Finn, V. R. Baker
  1178

Dissolution of Anorthite in Lunar Maria Basalts: Preliminary Experiments and Petrologic Significance
A. B. Finnila, P. C. Hess, M. J. Rutherford
  1179

Lunar Highland Soil Heterogeneity: Al/Si Estimated for the Limb and Farside from Galileo SSI and Apollo X-Ray Spectrometer Data
E. M. Fischer, C. M. Pieters, A. S. McEwen, J. W. Head, M. J. S. Belton
  1180

On the Origin of the Diamonds from the Efremovka Chondrite by the Thermoluminescence Data
A. V. Fisenko, L. L. Kashkarov, L. F. Semjonova
  1181

Isotopic Composition of Carbon and Nitrogen in the Diamonds from the Unequilibrated Ordinary Chondrite Krymka LL3.0
A. V. Fisenko, S. S. Russell, R. D. Ash, L. F. Semjenova, A. B. Verchovsky, C. T. Pillinger
  1182

Mossbauer Spectra of H-5 Chondrites from Antarctica
D. S. Fisher, R. G. Burns
  1183

The Noblesville Meteorite: Mechanism of Oxidation of Iron in Ordinary Chondrites Induced by Aerated Icewater
D. S. Fisher, R. G. Burns
  1184

The Contribution of Meterotic Material to the Dust and Aerosols in the Atmosphere of Mars
G. J. Flynn
  1185

Element Abundances in Stratospheric Cosmic Dust: Indications for a New Chemical Type of Chondritic Material
G. J. Flynn, S. R. Sutton
  1186

Zinc Depletions and Atmospheric Entry Heating in Stratospheric Cosmic Dust Particles
G. J. Flynn, S. R. Sutton, K. L. Thomas, L. P. Keller, W. Kloeck
  1187

C-O-S-Cl Volatiles in Primitive Lunar Glasses: FTIR and EM Analyses of Apollo 15 Green Glasses
R. A. Fogel, M. J. Rutherford
  1188

Classification of Carbonaceous Component in Comet Halley "CHON" Particles
M. Fomenkova, J. F. Kerridge, K. Marti, L. McFadden
  1189

Iron-rich Particles in Comet Halley Dust
M. Fomenkova, J. F. Kerridge, K. Marti, L. McFadden
  1190

New Mars Global Gravity Field: Correlation with Topography, Physiography and Large Impact Basins
H. Frey
  1191

Thermal History and Climatic Implications of Early Hesperian Ages for Presumed Noachian Age Volcanic Flows on Mars
H. Frey
  1192

Additional Evidence of a Young Impact-Melting Event on the L-Chondrite Parent Body
T. Fujiwara, N. Nakamura
  1193

Thermal Behavior of Noble Gases Implanted into Minerals
T. Futagami, M. Ozima, S. Nagai, T. Aoki
  1194

Observations of Lunar Pyroclastic Deposits with Galileo SSI Multispectral Data
L. Gaddis, A. McEwen, C. M. Pieters, J. Sunshine, R. Greeley
  1195

Narrowing the Search for Ordinary Chondrites Among the Large S-Type Asteroids: Identification and Tests of Three Prime Candidates
M. J. Gaffey
  1196

39Ar-40Ar Dating of Shock-Melted Phases of the Chico Chondrite and Implications for K-Ar Dating of Impact Melts
D. H. Garrison, D. D. Bogard
  1197

Morphometry of Large Impact Craters on Venus: Comparisons with Terrestrial and Lunar Examples
J. B. Garvin, G. G. Schaber
  1198

Cook 003: A New CK Chondrite from the Nullarbor Region, South Australia
T. Geiger, A. Bischoff, B. Spettel, A. W. R. Bevan
  1199

Spectrophotometric Mapping of Coprates Quadrangle, Mars
P. E. Geissler, R. B. Singer
  1200

Radiation Characteristics of the Olivine Grains from Soko-Banka LL4 Chondrite
L. I. Geneava, L. L. Kashkarov
  1201

Laser Simulation of Equilibrium High-Temperature Vaporization
M. V. Gerasimov, Yu. P. Dikovs, F. Wlotzka, L. M. Mukhin
  1202

Subduction at Artemis Chasma
R. C. Ghail, L. Wilson
  1203

Volatiles in Six Interplanetary Dust Particles
E. K. Gibson Jr., R. Bustin
  1204

Origin of Microdiamonds in KT Boundary Clays
I. Gilmour, S. S. Russell, C. T. Pillinger, M. Lee, J. W. Arden
  1205

Impact Ejecta Associated with the Australasian and North America Microtektite Layers
B. P. Glass, J. Wu
  1206

Global Geological Processes and the Role of Tidal Energy in the Earth's and Other Planets Evolution
M. Z. Glukhovsky, V. M. Moralev
  1207

Light Scattering by Lunar-like Particle Size Distributions
J. D. Goguen
  1208

Chemistry and Mineralogy of Oxidation Products from a Nickel-rich Ataxite
D. C. Golden, D. W. Ming, M. E. Zolensky
  1209

New Radar-derived Topography of Ancient Aqueous Sedimentation Basins on Mars
J. M. Goldspiel, S. W. Squyres, M. A. Slade, R. F. Jurgens, S. H. Zisk
  1210

Limits on the Expansion and Contraction of the Moon
M. P. Golombek, W. B. Banerdt, B. J. Franklin
  1211

Thermal Analyzer for Planetary Soils (TAPS) Experiment, 2: Water Sensors
J. L. Gooding, J. H. Allton, T. B. Byers, R. P. Dunn, F. L. Gibbons, D. B. Pate
  1212

Addition of LREE-Enriched Material to a Ureilite? at 4.23 Ga: Evidence for Episodic Metasomatism
C. A. Goodrich, G. W. Lugmair
  1213

Isotopic Disequilibrium in Coexisting Mineral Phases in an Efremovka CAI: an Ion Probe Study
J. N. Goswami, G. Srinivasan, A. A. Ulyanov
  1214

On the Delivery of Meteorites and Near-Earth Asteroids
T. Graf, K. Marti
  1215

The Matrix Minerology of the Vigarano (CV3) Chondrite
A. L. Graham, M. Lee
  1216

Recreating the Asteroid Belt of the Recent Past
J. C. Granahan, J. F. Bell
  1217

Gradation of the Rio Cuarto Crater Field, Argentina
J. A. Grant, P. H. Schultz
  1218

Laboratory Simulations of Explosive Volcanism and Implications for the K/T Boundary
A. J. Gratz, W. J. Nellis, N. Hinsey
  1219

Shock Deformation and Transformation in the SiO2 System
A. J. Gratz, W. J. Nellis, N. Hinsey
  1220

Trace Element Stratification in the Stevns Klint Cretaceous/Tertiary Boundary Layers
G. Graup, H. Palme, B. Spettel
  1221

Wind-related Features on Venus Observed via Magellan
R. Greeley, M. A. Geringer, R. E. Arvidson, C. Elachi, J. J. Plaut, R. S. Saunders, E. R. Stofan, S. D. Wall, C. M. Weitz, G. Schubert, E. J. P. Thouvenot
  1222

Formational Constraints on Venusian "Canali"
T. K. P. Gregg, R. Greeley
  1223

Venusian Impact Craters: Effects of Differential Scaling
R. A. F. Grieve, M. J. Cintala
  1224

Highlander III: On the Origin and Evolution of Large Uplands on Venus
R. E. Grimm, R. H. Herrick, R. J. Phillips
  1225

Modeling Martian Channels by Bifurcation Theory and Differential Topology: Arguments for Drainage of Subsurface Aquifer
E. A. Grin, N. A. Cabrol
  1226

Venusian Stress Directions from Radial Fractures
E. B. Grosfils, J. W. Head
  1227

Effects of Oxygen Fugacity on Partitioning of NI and CO Between Olivine and Silicate Melt: Implications for Eucrite Parent Body Evolution
T. L. Grove, K. E. Ehlers, M. J. Jercinovic, D. A. Zervas
  1228

Gravitational Collapse of the Margins of Volcanic Domes on Venus
J. E. Guest, M. H. Bulmer, K. Beretan, G. Michaels, S. Saunders
  1229

Martian Hydrothermal Systems: Some Physical Considerations
V. C. Gulick, V. R. Baker
  1230

Channel and Valley Morphology on Venus: an Updated Classification
V. C. Gulick, V. R. Baker, G. Komatsu
  1231

Integrated Valley Systems on Venus: A Comparative Morphologic Study
V. C. Gulick, G. Komatsu, V. R. Baker
  1232

VEER: Countermeasures Against the Threat of Asteroid Impact
J. G. Gurley, R. K. Cheng
  1233

Thermal History of Chondrites: Hot Accretion vs. Metamorphic Reheating
H. Haack, G. J. Taylor, E. R. D. Scott, K. Keil
  1234

Water Detection at the Moon and Mars with a Combined Neutron-Gamma Ray Instrument
E. L. Haines, A. E. Metzger, D. M. Drake
  1235

Fusion Crusts of Achondrites: Changes of Mineralogy of Iron in Outermost Surfaces of Meteorites
T. M. Hall, R. G. Burns
  1236

Vredefort Coesite Confirmed with Raman Spectroscopy
K. Halvorson, J. F. McHone
  1237

Regional Non-Coaxial Deformation on Venus: Evidence from Western Itzpapalotl Tessera
V. L. Hansen
  1238

Experimental Data Bearing on the Oxidation State of Chromium and Vanadium in Mafic Volcanics
B. Z. Hanson, J. W. Delano
  1239

Opposition Effect and Negative Polarization: Laboratory Studies
B. Hapke, R. Nelson, W. Smythe, V. Gharakanian, L. Horn, A. Lane
  1240

Radar Mapping of Mercury
J. K. Harmon, M. A. Slade
  1241

146,147Sm-142,143 Nd Systematics of Early Terrestrial Differentiation
C. L. Harper Jr., S. B. Jacobsen
  1242

High Precision Investigations of the 53Mn-53Cr Systematics. I. Bulk Carbonaceous Chondrites, Planetary Reservoirs and the Moon
C. L. Harper Jr., H. Wiesmann
  1243

High Precision Investigations of the Mn53 Cr53 Systematics. I: Acapulco
C. L. Harper Jr., L. E. Nyquist, B. Bansal, H. Wiseman
  1244

The "Voyager Paradigm" of Planetary Cratering: Further Unabashed Revisionism
W. K. Hartmann
  1245

Crater Saturation Equilibrium in Ancient Uplands: Preliminary Results of New Modelling
W. K. Hartmann, R. W. Gaskell
  1246

Manson Impact Structure Rocks: Evidence for an Exotic Component
J. B. Hartung, A. Kracher, R. Anderson, O. Plocher
  1247

Parental Magmas of the Nakhlites Re-Examined
R. P. Harvey, H. Y. McSween Jr.
  1248

Effects of REE3+ Saturation on the Substitution in Whitlockite of 2 REE3++ Vacancy in Ca(IIA) for 3 Ca2+
L. A. Haskin, B. L. Jolliff, R. O. Colson
  1249

On Partitioning of REE Between Whitlockite and Apatite in High-ITE Lunar Rocks: Petrologic Consequences
L. A. Haskin, B. L. Jolliff, R. O. Colson
  1250

The Distribution and Modes of Occurrence of Lunar Anorthosite
B. R. Hawke, P. G. Lucey, G. J. Taylor, C. A. Peterson, P. D. Spudis
  1251

Spectral Reflectance Studies of the Grimaldi Region of the Moon
B. R. Hawke, C. A. Peterson, P. G. Lucey, G. J. Taylor, D. T. Blewett, P. D. Spudis
  1252

Multispectral Study of Cerberus Dark Materials
J. N. Head, R. B. Singer, P. E. Geissler
  1253

Problems in Lunar Science: Galileo Results and the Promise of Future Exploration
J. W. Head
  1254

Large Shield Volcanoes on Venus: Distribution and Classification
J. W. Head, L. S. Crumpler, J. C. Aubele
  1255

A Major Global-Scale Concentration of Volcanic Activity in the Beta-Atla-Themis Region of Venus
J. W. Head, L. S. Crumpler, J. C. Aubele
  1256

Venus Global Volcanism: Characteristics and Distribution of Edifices and Deposits Implications for Resurfacing Style and Rates
J. W. Head, L. S. Crumpler, J. C. Aubele
  1257

951 Gaspra: Preliminary Albedos from Galileo Images
P. Helfenstein, J. Veverka, P. C. Thomas, D. P. Simonelli, B. Carcich, A. S. McEwen, J. W. Head, S. Murchie, C. Chapman, M. Belton, K. Klassen, F. Fanale, The Galileo Imaging Team
  1258

Multiple Scattering and Polarization of Thermal Emission from Particulate Planetary Surfaces
B. G. Henderson, B. M. Jakosky, C. E. Randall
  1259

Comparison of Magellan Data with the Interior Density Structure of Venus
R. R. Herrick, R. J. Phillips
  1260

Oxygen Isotopic Analysis of Allende Olivine by Ion Microprobe and Implications for Chondrule Origin
R. L. Hervig, I. M. Steele
  1261

Mass Fractionation of Nickel Isotopes in Metallic Cosmic Spherules Collected from Deep-Sea Sediments
G. F. Herzog, G. S. Hall, D. E. Brownlee
  1262

Dissolution of Plagioclase and the Origin of Mg-Suite Parent Magmas
P. C. Hess
  1263

Search for Fullerenes in Meteorites I: Roasting of Fullerenes in Air
D. Heymann
  1264

Earth-based Multispectral Observations of Mare Humorum and Western Oceanus Procellarum: Geological and Geochemical Implications
H. Hiesinger, H. Hoffmann, R. Jaumann, R. Rebhan, G. Neukum
  1265

Accretion of Fine Particles: an Optical Analysis of the Size Distribution and its Application to Determination of the Sticking Probability
Y. Higuchi, T. Okada, N. Sugiura
  1266

K/T Boundary Ejecta Distribution Predicts Size and Location of Chicxulub Crater
A. R. Hildebrand, J. A. Stansberry
  1267

Recent Studies of the Chicxulub Crater, Mexico
A. R. Hildebrand, M. Pilkington, R. A. F. Grieve, P. B. Robertson, G. T. Penfield
  1268

Metal-Silicate Partitioning Behaviour of Moderately Siderophile Elements in Ni-rich Systems
V. J. Hillgren, C. J. Capobianco, M. J. Drake
  1269

Spectral Comparison Between the S-Asteroids and Primitive Achondrites
T. Hiroi, J. F. Bell, H. Takeda, C. M. Pieters
  1270

Volcanic Degassing Under Thick Atmospheres: Consequences for Magmatic Volatiles on Venus
J. R. Holloway
  1271

Calculations of Catastrophic Disruptions of Asteroids
K. A. Holsapple
  1272

Deflection of Solar Wind Ions by Lunar Magnetic Fields: Implications for Resource Utilization
L. L. Hood
  1273

Gas Dynamic Heating of Chondrule Precursor Grains: Mechanisms for Generation of Nebular Shock Waves
L. L. Hood, M. Horanyi
  1274

Just How Many Types of Interstellar Carbon?
P. Hoppe, S. Amari, E. Zinner, R. S. Lewis
  1275

Crater Ejecta Velocities for Impacts on Rocky Bodies
K. R. Housen
  1276

XPS Studies of the Surface Chemistry of Lunar Highlands Regolith
R. M. Housley
  1277

Simulated Erosion of Martian Heavily Cratered Terrain
A. D. Howard
  1278

The Measurement of Optical Constants from Interstellar and Solar System Ice Analogs Using Transmission Infrared Spectroscopy
D. M. Hudgins, S. A. Sandford, L. J. Allamandola, A. G. G. M. Tielens
  1279

CR Isotopes in Differentiated Meteorites: Evidence for 53Mn
I. D. Hutcheon, E. Olsen, J. Zipfel, G. J. Wasserburg
  1280

Migration of Bodies During the Accumulation of Terrestrial Planets
S. I. Ipatov
  1281

Age and Trace-Element Chemistry of Yamato 791438 Zircon
T. R. Ireland, K. Saiki, H. Takeda
  1282

The Kaidun Meteorite: Aqueous Alteration of Metal Iron and Schreibersite
A. V. Ivanov, N. N. Kononkova, E. V. Guseva
  1283

Mass and Impact Velocity of the Meteorite Formed the Sterlitamak Crater in 1990
B. A. Ivanov, M. I. Petaev
  1284

The Possible Radiative Heat Damage of the Venusian Surface
B. A. Ivanov, A. A. Provalov, V. A. Rybakov
  1285

Explosive Volcanism on Venus?
M. A. Ivanov
  1286

Venera 13 and 14 Landing Sites: Geology from Magellan Data
M. A. Ivanov
  1287

Global Distribution of Tesserae: Analysis of Magellan Data
M. A. Ivanov, T. Tormanen, J. W. Head
  1288

Geochemical Evidences of Methane-producing Bacteria's Activity in Rocks of Mars
M. A. Ivanov, A. Yu. Lein, L. M. Mukhin
  1289

Chromite-rich Inclusions in the Homestead (L5) Chondrite
M. A. Ivanova, A. N. Krot, O. B. Mitreikina, N. G. Zinovieva
  1290

Na-Al-Cr-bearing Chondrules from the Berdyansk (L6) Chondrite
M. A. Ivanova, O. B. Mitreikina, A. N. Krot, N. G. Zinovieva
  1291

Thermoluminescence of Oligoclase as Indicator of Shock Metamorphic Processes
A. I. Ivliev, L. L. Kashkarov, G. V. Baryshnikova, D. D. Badjukov
  1292

Resurfacing Processes on Venus: Approaching a Global View
N. R. Izenberg, R. E. Arvidson, R. J. Phillips
  1293

Laser-Fusion 40Ar/39 Age of Australasian Tektites
G. A. Izett, J. D. Obrandovich
  1294

The Spatial Density Structure of Planet-shepherded Interplanetary Dust
A. A. Jackson, H. A. Zook
  1295

Excess Heat and the Early Planet Evolution
P. Jakes, A. M. Reid, I. Casanova
  1296

Silicate Melts at Super Liquidus Temperatures: Reduction and Volatilization
P. Jakes, S. Sen, K. Matsuishi, A. M. Reid, E. A. King, I. Casanova
  1297

Out on a Limb: Mars Atmospheric Opacity During the Last Hundred Years
B. M. Jakosky
  1298

Compositional Variations in Mare-Basalt Plagioclase Produced by Differing Crystallization Regimes
O. B. James, J. J. McGee
  1299

Dependence of Color Ratios on the Observation Geometry
R. Jaumann, G. Grobner, A. Dummel, H. Rebhan, G. Neukum
  1300

Glasses at the K/T Boundary of Beloc (Haiti) are not Tektites
C. Jehanno, L. Froget, E. Robin, R. Rocchia
  1301

Apollo 11 High-K Basalts: an Apollo 17 Connection and Evidence for neoKREEP
E. A. Jerde, G. A. Snyder, L. A. Taylor
  1302

Apollo 11 Low-K Basalts: A Single Source and REEP Contamination
E. A. Jerde, G. A. Snyder, L. A. Taylor
  1303

Chemical Composition of Apollo 11 Mare Basalt Rocks: Evidence for Sample Heterogeneity in 10057
E. A. Jerde, G. A. Snyder, L. A. Taylor, Y.-G. Liu, R. A. Schmitt
  1304

Widespread Alien Xe and Its Formation
E. K. Jessberger, J. L. Jordan, Yu. A. Shukolykov, A. P. Meshik, D. V. Minh
  1305

Incompatible Elements in Earth, Moon, EPB and SPB: A Comparison
K. P. Jochum, H. Palme
  1306

Flexure on Venus: Implications for Lithospheric Elastic Thickness and Strength
C. L. Johnson, D. T. Sandwell
  1307

Elliptical Impact Craters on Venus
J. R. Johnson, G. Komatsu, V. R. Baker
  1308

Mafic, Ferroan Lithologies from North Ray Crater, Apollo 16: Implications for Crustal Abundance
B. L. Jolliff
  1309

The Distribution of Rare Earth Elements Between Lunar Apatite and Whitlockite
B. L. Jolliff, M. Wadhwa
  1310

An Experimental Study of Partitioning Between Carbonate and Silicate Liquids
J. H. Jones, D. Walker, D. A. Pickett, M. T. Murrell
  1311

Classification of Porphyritic, Pyroxene-rich Chondrules in the Semarkona Ordinary Chondrite
R. H. Jones
  1312

Petrology of FeO-poor, Porphyritic Pyroxene Chondrules in the Semarkona Ordinary Chondrite
R. H. Jones
  1313

Fossil Glaciations in the Environs of the South Pole, Mars?
H.-P. Jons
  1314

Large-Scale Tectonic Features, Volcanoes, and Suspected Instrusions of the Ancient Uplands of Mars
H.-P. Jons
  1315

14C Terrestrial Ages of Two Lunar Meteorites, ALHA 81005 and EET 87521
A. J. T. Jull, D. J. Donahue
  1316

14C Depth Profile in Lunar Rock 68815
A. J. T. Jull, D. J. Donahue
  1317

Isotopic Studies Relevant to the Origin of the "White Druse" Carbonates on EETA 79001
A. J. T. Jull, D. J. Donahue, T. D. Swindle, M. K. Burkland, G. F. Herzog, A. Albrecht, J. Klein, R. Middleton
  1318

Chondrite Melting Experiments: Can Angrite LEW 87051 be Produced by Partial Melting of a CV or CM Chondrite?
A. J. G. Jurewicz, G. A. McKay
  1319

Experimental Partitioning of Zirconium, Titanium, and Niobium Between Silicate Liquid and Plantinum Metal
S. R. Jurevicz, J. H. Jones
  1320

Mare Basalts in the Orientale Basin: Galileo Multispectral Observations
S. D. Kadel, R. Greeley
  1321

Three Ungrouped Carbonaceous Chondrites from MacAlpine Hills, Antartica
G. W. Kallemeyn
  1322

Remote Elemental Analysis of Planetary Surfaces Using Laser-Induced Breakdown Spectroscopy
K. Y. Kane, D. A. Cremers
  1323

The Compositions of Planetary Cores and Mantles
J. S. Kargel
  1324

The Composition of Venus and the Petrogenesis of Venusian Silicate Lavas
J. S. Kargel, G. Komatsu
  1325

Subglacial and Glaciomarine Processes in the Martian Northern Plaints
J. S. Kargel, R. G. Strom, J. Lockwood, J. Shaw
  1326

New Data on 146Nd Excess in HNO3-and HCLO4-Soluble Fractions of Effremovka CV3 Chondrite
S. F. Karpenko, A. V. Fisenko, A. V. Ljalykov, L. F. Semenova
  1327

Modelling of the Chondrule Formation Process by Laser Radiation
L. L. Kashkarov, A. V. Fisenko
  1328

Radiation Parameters of the Elenovka L5 Chondrite by the Track Data for the Olivine Crystals of Different Size
L. L. Kashkarov, G. V. Kalinina
  1329

Complex Radiation-Thermal History of the Kaidun Chondrite
L. L. Kashkarov, N. N. Korotkova, A. Ya. Skripnik
  1330

Fission Track Dating of the Kara Impact Structure
L. L. Kashkarov, M. A. Nazarov, I. V. Suponeva
  1331

Sapas Mons Venus: Sequence of Events in a Large Shield Volcano
S. T. Keddie, J. W. Head
  1332

Petrography and Mineral Chemistry of Calcium-and Aluminum-rich Inclusions in the Maralinga CK4 Chondrite
L. P. Keller
  1333

Impact Glasses and Vapor Condensates in Apollo 11 Soil 10084
L. P. Keller, D. S. McKay
  1334

Thermal Processing of Cosmic Dust: Atmospheric Heating and Parent Body Metamorphism
L. P. Keller, K. L. Thomas, D. S. McKay
  1335

Magnetic Flocculation: The Metal-Silicate Separation
C. E. Kenknight
  1336

A Study of Trace Element Partitioning Between Olivine, Orthophyroxene and Melt in Chondrules: Equilibrium Values and Kinetic Effects
A. K. Kennedy, G. E. Lofgren, G. J. Wasserburg
  1337

Partitioning of REE Between Phosphates and Silicates in Mesosiderites: Evidence for Differing Degrees of Equilibration
A. K. Kennedy, B. W. Stewart, I. D. Hutcheon, D. A. Papanastassiou, G. J. Wasserburg
  1338

Isotopic Systematics of Lunar Surface Nitrogen: A Reappraisal
J. F. Kerridge
  1339

Convective Uplift and the Formation of the Tharsis and Elysium Regions of Mars
W. S. Kiefer
  1340

Spectrophotometry of the Moon for Calibration of Space-borne Imaging Instruments
H. H. Kieffer, R. L. Wildey
  1341

Evidence for Neutron Irradiation in the Early Solar System
J. S. Kim, K. Marti
  1342

Search for N and Xe Carriers in the Acapulco Meteorite
Y. Kim, J. S. Kim, K. Marti
  1343

On the Isotopic Signature of Recent Solar-Wind Nitrogen
Y. Kim, J. S. Kim, K. Marti, J. F. Kerridge
  1344

Mossbauer Spectrometer for Mineralogical Analysis of the Mars Surface for the Marts-96 Mission
G. Klingelhofer, J. Foh, P. Held, H. Jager, E. Kankeleit, R. Teucher, E. N. Evlanov, V. N. Khromov, L. M. Mukhin, O. F. Prilutski, B. Zubkov, J. M. Knudsen, M. Madsen, G. V. Smirnov, J. Juchniewicz, C. D'Uston
  1345

Bulk Composition and MIneralogy of Antarctic Micrometeorites
W. Kloeck, W. Beckerling, B. Spettel, G. Flynn, S. Sutton
  1346

Chemical Weathering of Evolved Igneous Rocks on Venus
K. B. Klose, M. Yu. Zolotov
  1347

Bistable Activity of a Cometary Analogous Ice-/Mineral Mixture During Insolation
H. Kochan, E. Gruen, J. Gebhard, J. Benkhoff, E. Kuhrt, P. Lammerzahl, E. Lorenz, D. Mohlmann, K. Roessler, K. J. Seidensticker, H. Thomas
  1348

Comparison of Blob Tectonics (Venus) and Pair Tectonics (Earth)
G. G. Kochemasov
  1349

Tesserae in the Light of a New Tectonics of Lithospheric Waves
G. G. Kochemasov
  1350

Chemical Composition of Meteoritic and Impactite Samples from the Rio Cuarto Craters, Argentina
C. Koeberl, P. H. Schultz
  1351

Bulk Major and Trace Element Analyses of Unmelted Micrometeorites from CAP Prudhomme, Antartica
C. Koeberl, G. Kurat, T. Presper, F. Brandstaetter, M. Maurette
  1352

Incipient Runaway Growth of Planets: Critical Physical Processes
R. A. Kolvoord, R. Greenberg
  1353

Discharge Estimates for the Venus "Outflow" Channel
G. Komatsu, V. R. Baker
  1354

Formation of Venusian Channels and Valleys, and Styles of Volcanism
G. Komatsu, V. R. Baker
  1355

Global Distribution of Venusian Channels and Implications for Venus Volcanism
G. Komatsu, V. R. Baker, T. J. Parker
  1356

Venus Lava Sapping Valleys
G. Komatsu, V. C. Gulick, J. S. Kargel, V. R. Baker
  1357

Compositional Differences Between Feldspathic Fragmental Breccias and Ancient Regolith Breccias from Apollo 16
R. L. Korotev
  1358

Composition of Impact Melts from Station 13 at Apollo 16
R. L. Korotev
  1359

Digital Geologic Maps of the Planets
R. C. Kozak, R. M. Batson, N. K. Isbell
  1360

The Trace-Element Composition of Eagles Nest and Its Relationship to Other Ultramafic Achondrites
D. A. Kring, W. V. Boynton
  1361

Cr-rich Chondrules and Inclusions in Ordinary Chondrites
A. N. Krot, M. A. Ignova
  1362

The Chromite-Whitlockite-Plagioclase Association in the Raguli (H3-4) Chondrite; Chemistry and Assumed Genesis
A. N. Krot, M. A. Ivanova, M. I. Petaev
  1363

Chromite Chondrules from the Ordinary Chondrites Raguli (H3-4) and Cullison (H-4): Mineralogy and Chemistry
A. N. Krot, O. B. Mitreikina, M. A. Ivanova, I. A. Stroganov, N. G. Zinovieva
  1364

Cr-rich Inclusion of Unusual Texture from the Gilgoin (H5) Chondrite
A. N. Krot, O. B. Mitreikina, M. A. Ivanova, I. A. Stroganov, N. G. Zinovieva
  1365

The Chromite-Whitlockite-Plagioclase Association in the Raguli (H3-4) Chondrite: Mineral Composition and Morphology
A. N. Krot, O. B. Mitreikina, M. A. Ivanova, I. A. Stroganov, N. G. Zinovieva, N. N. Kononkova
  1366

Tectonic Bedding as Deduced from Analysis of Linear Deformation Zones at Lavinia Planitia, Venus (Preliminary Results)
V. P. Kryuchkov
  1367

A Spectral Study of Venus Topography in Two Selected Equatorial Regions
A. B. Kucinskas, D. L. Turcotte, J. Huang, P. G. Ford
  1368

Loss of Ice from Accreting Giant-Icy-Satellites by the Escape of Hot Proto-Atmospheres
K. Kuramoto, T. Matsui
  1369

A SIMS Study of Some Allende Chondrules: Support for the New Chondrule Model
G. Kurat, F. Brandstaetter, E. Zinner, H. Palme, B. Spettel
  1370

CI-Like Micrometeorites from CAP Prudhomme, Antarctica
G. Kurat, F. Brandstaetter, M. Maurette, C. Coeberl
  1371

Oblique Rifting of the Corporation Margin at 1964 Ma: Evidence from the West Bay-Indian Lake Fault System
T. M. Kusky, P. F. Hoffman
  1372

The Role of the Moon in Gravitational Wave Astronomy
N. L. Lafave, T. L. Wilson
  1373

"Great" Lava Fields on Venus
M. G. Lancaster, J. E. Guest, K. M. Roberts, J. W. Head
  1374

Radar-Visible Wind Streaks on Venus Compared with Terrestrial Analogs
R. Landheim, M. A. Geringer, R. Greeley, J. Barker
  1375

Shock Effects in Quartz: Strong Dependence on the Pre-Shock Temperature
F. Langenhorst, A. Deutsch
  1376

On Nucleosynthesis of Solar System Matter
A. K. Lavrukhina
  1377

On the Heterogeneity of Conditions of Element Production in the Supernova Shell
A. K. Lavrukhina, G. K. Ustinova
  1378

The Oxygen Isotopic Composition of the Andreevka L3 Unequilibrated Ordinary Chondrite Chondrules
A. K. Lavrukhina, V. I. Ustinov, G. V. Baryshnikova, Yu. A. Shukolyukov
  1379

Influence of Electrostatic Charges on the Movement of Dust by Wind
R. N. Leach, S. J. Schrodi, R. Greeley
  1380

Polarimetric Survey of Crystal Clouds on Mars
P. Lee, A. Dollfus
  1381

The Small Craters of Venus--An Inspection Using Magellan Data
C. Leff, A. D. Morrison
  1382

On the Surface Layers of the Lunar Regolith Grains
G. A. Lejkin, E. V. Zabalueva, V. S. Fainberg
  1383

Maxwell and the Andes: Analogous Structures?
A. Lenardic, W. M. Kaula, D. L. Bindschadler
  1384

Interstellar Murchison Graphite: How Many Noble Gas Components?
R. S. Lewis, S. Amari
  1385

Bipolar Outflows and Meteorites
K. Liffman
  1386

Scandium/Iron and Cobalt/Iron Ratios as Indicators of the Sources of Stratospheric Dust Particles
D. J. Lindstrom
  1387

Geochemical Studies of Apennine Front Coarse-Fines Particulates
M. M. Lindstrom, D. W. Mittlefehldt, R. R. Martinez
  1388

LEW88516: A New Shergottite from Antarctica
M. M. Lindstrom, D. W. Mittlefehldt, A. H. Treiman, S. J. Wentworth, J. L. Gooding, R. V. Morris, L. P. Keller, G. A. McKay
  1389

Noblesville Meteorite Breccia: Recovery and Initial Characterization
M. E. Lipschutz, S. F. Wolf, S. Gartenhaus, M. M. Lindstrom, D. W. Mittlefehldt, M. E. Zolensky, J. F. Wacker, P. H. Benoit, D. W. G. Sears, R. T. Dodd
  1390

Absence of Zn, As, and SB Enrichments Relative to North American Shale Composite in 11 Worldwide K/T Boundary Clays and in Shatsky Rise K/T Boundary Clays Torpedoes Hydrothermal-Smoker Poisoning Hypothesis for the Oceanic Mass Extinction Mechanism at K/T
Y.-G. Liu, R. A. Schmitt
  1391

Permian/Triassic Boundary, Carnic Alps Austria, Revisited; Correlations with CE Anomalies, 813C, and Siberian Trap Flood Basalts, 1
Y.-G. Liu, R. A. Schmitt
  1392

Permian/Triassic Boundary, Carnic Alps Austria, Revisited; Correlations with CE Anomalies, 813C, and Siberian Trap Flood Basalts, 2
Y.-G. Liu, R. A. Schmitt
  1393

Alteration of Chondrules in ALH 84034, an Unusual CM2 Carbonaceous Chondrite
J. Llorca, A. J. Brearley
  1394

Thumbprint Terrain on the Northern Plains: A Glacial Hypothesis
J. F. Lockwood, J. S. Kargel, R. B. Strom
  1395

Lanthanide and Actinide Condensation into Oldhamite Under Reducing Conditions
K. Lodders, B. Fegley Jr.
  1396

Dyanamic Crystallization Studies of Enstatite Chondrite Chondrules: Cathodoluminescence Properties of Enstatite
G. E. Lofgren, J. M. Dehart
  1397

RELICT Enstatite and Olivine in Porphyritic Chondrules from Enstatite Chondrites Formed by Partial Melting of Precursor Material
G. E. Lofgren, J. M. Dehart, T. L. Dickinson
  1398

The Values and Variations of C/3 He and C/36 AR in Some Earth's Mantle Samples and Meteorites
K. I. Lokhov, L. K. Levsky
  1399

Volatiles in SNC Petrogenesis: A SR Signal?
J. Longhi
  1400

Pressure Effects in Anorthositic and Related Magmas
J. Longhi, M. S. Fram, J. Vander Auwera, J. Montieth
  1401

The Growth of AA and Blocky Lavas and Implications for Magmatic Feeding Systems
R. Lopes-Gautier, C. R. J. Kilburn
  1402

Depositional Mechanics of Impact-Produced Debris in the Archean Barberton Greenstone Belt, South Africa
D. R. Lowe, G. R. Byerly
  1403

The Four Primitive Chondrule Groups and the Formation of Chondrules
J. Lu, D. W. G. Sears, P. H. Benoit, M. Prinz, M. K. Weisberg
  1404

A Martian Landslide Caught in the Act?
B. K. Lucchitta, H. M. Ferguson
  1405

Valles Marineris Volumes
B. K. Lucchitta, N. K. Isbell
  1406

A Program of Systematic Study of the Effect of Noncompositional Factors on Telescopic Thermal Infrared Spectra of the Moon
P. G. Lucey, B. C. Bruno
  1407

A Near-Infrared Imaging Survey of the Moon
P. G. Lucey, D. Blewett, C. Budney
  1408

The 53Mn-53Cr Isotope System and Early Planetary Evolution
G. W. Lugmair, C. MacIsaac, A. Shukolyukov
  1409

The Ferrigmagnetic Phase in Nakhla and Zagmi--Implications for the Martian Fines
M. B. Madsen, M. Olsen, J. M. Knudsen, D. Petersen, L. Vistisen
  1410

Numerical Simulation of Retrograde Tidal Capture of a Triton-like Planetoid by a Neptune-like Planet: Two-Dimensional Limits of a Stable Capture Zone
R. J. Malcuit, D. M. Mehringer, R. R. Winters
  1411

Constraints on the Putative Companions to PSR1257+12
R. Malhotra, D. Black, A. Eck, A. Jackson
  1412

DTA/GC: Limits of Detectability and Indentification of Minerals
R. L. Mancinelli, M. R. White, A. Banin
  1413

Ultrahigh Pressure Studies of Hydrogen
H. K. Mao, R. J. Hemley
  1414

Investigation of Stresses in the Lithosphere of Mars: New Tectonic Interpretation
K. I. Marchenkov, E. M. Koshlyakov, V. N. Zharkov, A. M. Nikishin
  1415

Space Gophers: Robotic Mining Systems in Inner Solar System Exploration
A. A. Mardon
  1416

The Utilization of Helmet Mounted Display (HMD) in Space Extra-Vehicular Suits and Lunar Extra-Vehicular Surface Suits
A. A. Mardon
  1417

Potential Meteorite Recovery Locales Within Russian Antarctic Logistical Capability
A. A. Mardon, J. S. Williams
  1418

Age Constraints on the Chicxulub Impact Structure: K/T or Not?
L. E. Marin, J. M. Quezada Muneton, V. L. Sharpton, G. Ryder, B. C. Schuraytz, G. B. Dalrymple
  1419

Simulation of the Nonstationary Processes in the Vicinity of Cometary Nuclei
M. Ya. Marov, A. V. Kolesnichenko, Yu. Skorov
  1420

Global Behavior of Martian Atmospheric Dust During the Viking ERA
T. Z. Martin, M. I. Richardson
  1421

Highland and Mare Components in the Callcalong Creek Lunar Meteorite
U. B. Marvin, B. B. Holmberg
  1422

Production of Cosmogenic Nuclides in Extraterrestrial Objects
J. Masarik, P. Chochula, P. Povinec
  1423

Xenon Production Cross Sections by High Energy Protons on Barium Targets
K. J. Mathew, R. Michel, M. N. Rao
  1424

Noble Gas Partition Between Metal and Silicate Under High Pressure
J. Matsuda, M. Sudo, M. Ozima
  1425

Antarctic Micrometeorites Smaller than 50 microns
M. Maurette, D. E. Brownlee, D. J. Joswiak, S. R. Sutton
  1426

The 1991 EUROMET Collection of Micrometeorites at Cap-Prudhomme, Antarctica: Discussion of Possible Collection Biases
M. Maurette, G. Immel, M. Perreau, M. Pourchet, C. Vincent, G. Kurat
  1427

Possible Causes of Depletion and Enrichment of Minor Elements in Antarctic Micrometeorites
M. Maurette, G. Kurat, T. Presper, F. Brandstaetter, M. Perreau
  1428

Geologic Effects of Atmosphere Loss on Mars: Evidence from Highland Erosion
T. A. Maxwell, R. A. Craddock
  1429

Geologic Mapping of the Elysium Region of Mars
K. McBride
  1430

Lead Isotopic Compositions of Plagioclases and Sulfides in the Stillwater Complex: Evidence for Isotopic Disequilibrium and Remobilization
I. S. McCallum, M. W. Thurber, D. Bosch, B. K. Nelson
  1431

ILAFEGH 009: A New Sample of the Diverse Suite of Enstatite Impact Melt Rocks
T. J. McCoy, K. Keil, D. Bogard, I. Casanova, M. M. Lindstrom
  1432

Monument Draw and the formation of the Acapulcoites
T. J. McCoy, K. Keil, T. K. Mayeda, R. N. Clayton
  1433

A Molecular Dynamic Study of the Thermodynamic Behavior of a Thin Film Undergoing Hypervelocity Penetration
R. A. McDonald, W. G. Tanner Jr., W. M. Alexander
  1434

LDEF's Space Exposure Yields Hypervelocity Impact Penetration Relationships
J. A. M. McDonnell
  1435

Temporal Variability of the Surface and Atmosphere of Mars: Viking Orbiter Color Observations
A. S. McEwen
  1436

Lunar Craters and Soils: Ages, Colors, and Regolith Thicknesses
A. S. McEwen, L. R. Gaddis, G. Neukum, H. Hoffmann, C. M. Pieters, J. W. Head III
  1437

Io Thermophysics: New Models with Voyager I Thermal IR Spectra
A. S. McEwen, N. R. Isbell, J. C. Pearl
  1438

Mantle Mineral/Silicate Melt Partition Coefficients
E. A. McFarlane, M. J. Drake, D. C. Rubie, T. Gasparik
  1439

State of Stress and Tectonics of Large volcanoes on Mars and Earth
P. J. McGovern, S. C. Solomon
  1440

Earth Multiple Impact Craters and Astroblemes
J. F. McHone, R. S. Dietz
  1441

REE Partition Coefficients for the Nakhla Parent Melt
G. McKay, L. Le, J. Wagstaff
  1442

Changes in Redox State During Ordinary Chondrite Metamorphism
H. Y. McSween Jr., T. C. Labotka
  1443

High Spatial Resolution Mapping of Lunar Mare Titanium Abundances
D. E. Melendrez, S. M. Larson, R. B. Singer, J. R. Johnson
  1444

Stability and Diffusion Time Scales of Water Ice in the Martian Regolith
M. T. Mellon, B. M. Jakosky
  1445

Compositional Variations on the Surface of Mars: Mixing Model Analysis from a Telescopic Spectral Image
E. Merenyi, J. S. Miller, R. B. Singer
  1446

Seasonal CAP Measurements at Mars via Gamma Ray Spectroscopy
A. E. Metzger, E. L. Haines
  1447

The Eskers of New York State: Formation Process Implications and Esker-like Features on the Planet Mars
S. M. Metzger
  1448

Morphology of Regional Fracture Systems on Venus
G. A. Michaels, R. S. Saunders, E. R. Stofan
  1449

Acquisition of Terrestrial KR and Xe by Meteoritic, Orthopyroxene
Th. Michel, O. Eugster
  1450

Cosmogenic Nuclide Depth Profiles in the Iron Meteorite, Canyon Diablo
E. Michlovich, M. E. Lipschutz, M. Shortreed, S. Vogt, D. Elmore
  1451

The Inclusion in the L-Chondrite Tsarev: New Type of Basaltic Matter in the Solar System
L. F. Migdisova, A. A. Yaroshevsky, N. N. Konokova
  1452

Radiance Factor Calibration of 1988 Visible and Near-IR Spectral Images of Mars
J. S. Miller, R. B. Singer, W. K. Wells, L. Weller
  1453

Method for the Stabilization and Characterization of Phyllosilicates in Carbonaceous Chondrites
D. W. Ming, S. V. Yang, D. C. Golden, K. L. Thomas, L. P. Keller, K. Krivian, R. A. Barrett, M. E. Zolensky
  1454

The Vredefort Dome, South Africa: New Structural Geological Data from the Granite-Greenstone Terrane in the Southeastern Quadrant
R. C. A. Minnitt, W. U. Reimold, W. P. Colliston
  1455

U-Th-Pb, Sm-Nd, and Rb-Sr Isotopic Systematics of Lunar Meteorite Asuka-31
K. Misawa, M. Tatsumoto, K. Yanai
  1456

Projectile Dissemination in Impact Melts from Meteor Crater, Arizona
D. W. Mittlefedhlt, T. H. See, F. Hoerz
  1457

Two-Stage Cooling History of the Moore County Eucrite
M. Miyamoto, H. Takeda
  1458

Infrared Diffuse Reflectance Spectra of Some Carbonaceous Chondrites
M. Miyamoto, M. E. Zolensky
  1459

CaO Contents in Olivine: an Experimental Study
M. Miyamoto, D. S. McKay, G. E. Lofgren, M. B. Duke
  1460

An Explosive Eruption on Venus
H. J. Moore, P. M. Schenk, J. J. Plaut, C. M. Weitz
  1461

Cocharan and Other Venuian Impact Craters
H. J. Moore, C. M. Weitz, G. G. Schaber
  1462

Why the Surfaces of Outer Belt Asteroids are Dark and Red?
L. V. Moroz, C. M. Pieters, M. V. Akhmanova
  1463

Hazes and Clouds on Mars: Some of the PHOBOS Mission Results
V. I. Moroz
  1464

Maturity of the 60013/14 Core
R. V. Morris, H. V. Lauer Jr.
  1465

On Developing TAPIs (Time and Provenance Indicators); A Scenario for Robotic Lunar Sampling Followed by Analysis in Terrestrial Laboratories
B. E. Moss, L. A. Haskin, R. L. Korotev, B. L. Jolliff
  1466

Emplacement of Long Lava Flows at Elysium Mons, Mars
P. J. Mouginis-Mark
  1467

The Forms and Evolution of Water in Martian Soil: Evidence from ISM Imaging Spectroscopy
S. L. Murchie, S. Erard, J. Bishop, J. Mustard, J.-P. Bibring, Y. Langevin
  1468

The Nature and Distribution of Albedo Variations on Dark and Light Materials on Ganymede
S. L. Murchie, P. Helfenstein, J. Head, D. Domingue, G. Hanson
  1469

The Geology of the Interior Deposits of Valles Marineris from Viking Images and ISM Imaging Spectroscopy
S. L. Murchie, S. Erard, J. F. Mustard, J.-P. Bibring, Y. Langevin, J. W. Head, C. M. Pieters
  1470

Spectral Properites of Orientale Basin Materials from Galileo Images
S. L. Murchie, J. W. Head, A. S. McEwen, J. F. Mustard, C. M. Pieters, M. S. Belton
  1471

The Origin of Grooves and Crater Chains on PHOBOS
J. B. Murray, D. A. Rothery, G. Thornhill, J.-P. Muller, T. Cook
  1472

Solar Gases in Parsa Enstatite Chondrite
S. V. S. Murty
  1473

Production of the Martian Atmosphere by 2-Stage Outgassing of an Early Magma Ocean
D. S. Musselwhite, M. J. Drake, T. D. Swindle
  1474

Pyroxene Chemistry of the Syrtis Major Volcanic Plateau
J. F. Mustard, S. Erard, J.-P. Bibring, Y. Langevin, J. W. Head, C. M. Pieters
  1475

Schickard Cryptomare: Interaction Between Orientale Ejecta and Pre-Basin Mare from Spectral Mixture Analysis of Galileo SSI Data
J. F. Mustard, J. W. Head, S. M. Murchie, C. M. Pieters, M. S. Belton
  1476

Olivine at Low Pressures and Its Implication for the Origin of Chondrules
H. Nagahara, I. Kushiro, B. O. Mysen
  1477

Incongruent Evaporation of Diopside to Akermanite
H. Nagahara, B. O. Mysen, N. Shimizu
  1478

The Gabbro-Eclogite Phase Transition and the Elevation of Mountain Belts on Venus
N. Namiki, S. C. Solomon
  1479

Chemical Working Fluid Mechanism for Recycling and Exothermic Heating of Io's Surface
D. B. Nash, G. R. Vanhecke
  1480

Zeolitization of Impactites and Brecia in Puchezh-Katunki Astrobleme
M. V. Naumov
  1481

The Kara Structure as a Possible K/T Impact Site
M. A. Nazarov, D. D. Badjukov, A. S. Alekseev
  1482

Chemical Relationship Between Kara Crater Rocks and K/T Glasses
M. A. Nazarov, D. D. Badjukov, L. D. Bausukova, N. N. Konokova, T. V. Romasheva
  1483

The Kara Impact Structure: Nd-Sr Isotopic Composition of an Impact Melt
M. A. Nazarov, S. F. Karpenko, A. V. Ljalikov, M. I. Smolyar, E. M. Kolesnikov, L. D. Barsukova
  1484

The Petrogenesis of Apollo 12 Mare Basalts, Part 1: The "Lumpers" Versus the "Splitters"
C. R. Neal, M. D. Hacker, L. A. Taylor, R. A. Schmitt, Y.-G. Liu
  1485

The Recognition of Monomict and Polymict Clasts from Apollo 17 Breccias
C. R. Neal, L. A. Taylor, R. A. Schmitt, Y.-G. Liu
  1486

The Explosion in the Atmosphere of Mars Caused by a High-Speed Impact of Cosmic Bodies
I. V. Nemtchinov, V. V. Shuvalov
  1487

Siderophile Element Abundances and Behavior
H. E. Newsom, P. D. Noll Jr., F. A. Slane, T. B. Beserra
  1488

Carbon and Nitrogen Isotope Studies of a Suite of Type CO3 Carbonaceous Chondrites
J. Newton, J. W. Arden, C. T. Pillinger
  1489

Spallation-produced 21 NE in Individual Orgueil Olivines
R. H. Nichols Jr., C. M. Hohenberg, J. N. Goswami
  1490

22Ne-E(H) and 4He in Single SiC and 22 Ne-E(L) in Single C of Known C-Isotopic Compositions
R. H. Nichols Jr., C. M. Hohenberg, P. Hoppe, S. Amari, R. S. Lewis
  1491

Helium Release from Interplanetary Dust Particles in Laboratory Studies Simulating the Heat Pulse Experienced by Particles During Atmospheric Entry
A. O. Nier, D. J. Schlutter
  1492

The Giant Impact: A New Paradigm for the Origin of the Global Crustal Dichotomies of the Terrestrial Planets
O. V. Nikolaeva, K. B. Klose
  1493

Exposure History of Separated Phases from the Kapoeta Meteorite
K. Nishiizumi, J. R. Arnold, M. W. Caffee, R. C. Finkel, J. Southon
  1494

10Be and 26AI in Individual Cosmic Spherules from Antarctica
K. Nishiizumi, J. R. Arnold, J. Klein, R. Middleton, D. E. Brownlee, E. H. Hagen, G. Faure
  1495

A Geochemical Model for the Enriched Crust and Depleted Mantle of Mars
M. D. Norman
  1496

The Physical Properties of Carbonatite Lavas: Implications for Planetary Volcanism
G. E. Norton, H. Pinkerton
  1497

Petrological Studies and Bulk Chemical Analyses of Eight Antarctic Aubrites
Th. Ntaflos, C. Koeberl
  1498

Laboratory Studies of Very Small Iron Grains: Magnetically Enhanced Coagulation
J. A. Nuth, O. Berg, J. Faris, P. Wasilewski
  1499

Nd Isotopic Evidence for Lunar Crust/Mantle Mixing--Possibly During a Basin-Forming Impact
L. E. Nyquist, C.-Y. Shih
  1500

147Sm - 143Nd Ages and 146 Sm-142 Nd Formation Intervals of Basalt Fragments from the HED Parent Body
L. E. Nyquist, B. M. Bansal, H. Wiesmann, C.-Y. Shih
  1501

Impact Crater Deposit Production on Earth
V. R. Oberbeck, H. Aggarwal
  1502

First Results from the DLR Goniospectrophotometer
A. Oehler, G. Neukum
  1503

Melting and Shock Weakening Effects on Impact Crater Morphology
J. D. O'Keefe, T. J. Ahrens
  1504

Puenta del Zacate: First Occurrence of a Silicate Inclusion in a Type III Iron (But What Is It?)
E. J. Olsen, A. M. Davis, C. B. Moore, R. N. Clayton, T. K. Mayeda, I. M. Steele
  1505

Origin of Allende Chondrules
H. Palme, B. Spettel, G. Kural, E. Zinner
  1506

Single-Plate Rifting Model for Ridge and Trough Terrain on Icy Satellites
R. Pappalardo, R. Greeley
  1507

A Survey of Radial Fracture Systems on Venus
E. A. Parfitt, J. W. Head
  1508

Preliminary Geologic Mapping of the MTM-55036 and 55043 Quadrangles, Southern Argyre Planitia, Mars
T. J. Parker, D. S. Gorsline
  1509

"Sourceless" Outflow Channels and STEM Valleys on Mars
T. J. Parker, D. S. Gorsline
  1510

Longitudinal Topographic Profiles of Very Long Channels in Venusian Plains Regions
T. J. Parker, G. Komatsu, V. R. Baker
  1511

Chemical Differentiation of a Convecting Planetary Interior: Consequences for One-Plate Planets such as Venus
E. M. Parmentier, P. C. Hess
  1512

Three Dimensional Thermal Convection at High Rayleigh Number; Implications for the Structure and Evolution of Planetary Interiors
E. M. Parmentier, C. J. Sotin
  1513

Steep-Sided Domes on Venus: Distribution, Associations, and Implications for Petrologic Models
B. Pavri, J. W. Head, L. Wilson, B. Kluse
  1514

Laboratory Studies of Analogs of Early Solar Nebula Condensed Objects
D. Peak, S. J. Kusiak, B. Donn
  1515

Interference Imaging of Plagioclase in Lunar Materials
T. H. Pearce, C. Timms
  1516

Evidence for Sorting Effects in the Regolith of the Kapoeta Parent Body
A. Pedroni
  1517

Solar Noble Gases in Mineral Separates of ACFER 111
A. Pedroni, F. Begemann, H. W. Weber
  1518

244Pu Content of Phosphates and Cooling History of Acapulco Meteorite
P. Pellas, C. Fieni
  1519

Evolution of Earth's Noble Gases from Primordial Distributions: Consequences of Assuming Hydrodynamic Loss Driven by Giant Impact
R. O. Pepin
  1520

Inclusions in the Metal of Tieschitz and Krymka
C. Perron, M. Bourot-Denise
  1521

The Chicxulub Structure: Surface Manifestation and Possible Sulfur Isotope Signature
E. C. Perry, D. J. Winter, B. Sagar, B. Wu
  1522

The Divnoe Achondrite--VI. New Data on Bulk Chemistry
M. I. Petaev, L. D. Barsukova, T. V. Shumskarya, T. V. Romashova, A. K. Galuzinskaya, M. I. Smoliar
  1523

Vorotilovskaya Drillhole: First Deep Drilling in the Central Uplift of Large Terrestrial Impact Crater
L. A. Pevzner, A. F. Kirjakiv, A. K. Vorontsov, V. L. Masaitis
  1524

The Resurfacing History of Venus: Constraints from Impact Crater Distribution
R. J. Phillips, R. R. Herrick, R. E. Grimm, R. F. Raubertas, I. C. Sarkar, R. E. Arvidson, N. Izenberg
  1525

D's for Cr, Mn, and TI as Tests of Igneous vs. Subsolidus Equilibration of Mafic Minerals in Lunar Rocks
W. C. Phinney
  1526

Compositional Implications of SSI Multispectral Images of the Unexplored Lunar Farside
C. M. Pieters, M. Belton, E. Fischer, R. Greeley, R. Jaumann, J. W. Head, H. Hoffmann, A. McEwen, S. Murchie, G. Neukum, J. Sunshine
  1527

Spectral Properties of Agglutinate Separates from Soil 10084
C. M. Pieters, E. Fischer, J. Mustard, S. Pratt, A. Basu
  1528

The Geophysical Signature of Terrestrial Impact Craters
M. Pilkington, R. A. F. Grieve
  1529

Detailed Spectro-Mixing Analysis of Copernicus Crater from High Resoultion Visible-Near Infrared Imaging Data
P. C. Pinet, S. Chevrel, P. Martin
  1530

High Resolution UV-Visible-Near Infrared Spectro-Imaging Data of Reiner Gamma Formation
P. C. Pinet, S. Cheveral, V. V. Shevchenko
  1531

Rheological Properties of Basaltic Lavas
H. Pinkerton, R. J. Stevenson
  1532

The Dynamics of Channel-Fed Lava Flows
H. Pinkerton, L. Wilson
  1533

Multiple Views of Venus: Geological Significance of Scattering Law Anomalies
J. J. Plaut
  1534

Compressive Stain Across Wrinkle Ridges in Arcadia Plaintia
J. B. Plescia
  1535

Recent Elysium Volcanism--Effects on the Martian Atmosphere
J. B. Plescia, J. Crisp
  1536

False-Positive Responses in "Getter" Simulations of Viking LR Results: Invalidation of that Evidence for Acidic Clay Minerals on Mars
R. C. Plump, A. A. Scala, R. Tantayanon
  1537

Reconstruction of Vesta Image
Ye. A. Pluzhnik, F. P. Velichko
  1538

Indenter Type Deformation on Venus as Evidence for Large-Scale Tectonic Slip, and Multiple Strike-Slip Events as a Mechanism for Producing Tesselated Terrain
H. A. Pohn, G. G. Schaber
  1539

Biospheric Effects of the Proposed Chicxulub K/T Bolide
K. O. Pope, A. C. Ocampo
  1540

Nd-Sr Isotopic Signature of the Pierre Shale: Target Material at the Manson Impact Site and Source of the Haitian Tektites (K-T Boundary)?
W. R. Premo
  1541

Acid Leaching of Apatite: Implications for U-Th-Pb Systematics of Lunar Highland Plutonic Rocks
W. R. Premo, M. Tatsumoto
  1542

U-Pb Isotopes in Dunites 72415
W. R. Premo, M. Tatsumoto
  1543

Accretionary Wedge Mechanics on Venus: A Brittle/Ductile Critical Taper Model
E. J. Price, C. Connors, F. A. Dahlen, J. Suppe, C. A. Williams
  1544

Geologic Mapping of Part of Harmakhis Vallis Region, Mars: Evidence of Multiple Drainage Events
K. H. Price
  1545

ACFER 182/207: A New ALH85085-Type Chondrite and Its Implications
M. Prinz, M. K. Weisberg
  1546

S-Process SR and BA in SiC from Murchison Series KJ
C. A. Prombo, F. A. Podosek, S. Amari, R. S. Lewis
  1547

A Possible Mechanism of Gravity Relaxation on Venus
A. A. Pronin, M. A. Kreslavsky
  1548

Near Surface Soil-Gas Flow Due to Impact on Venus
A. A. Provalov, B. A. Ivanov
  1549

Clasts in Kapoeta: Implications for the Regolith Evolution of the HED Parent Body
A. Pun, K. Keil, G. J. Taylor, R. Wieler, E. A. King
  1550

A Comparison Between a "Unique" Eucrite Clast from the Kapoeta Howardite and the Pasamonte Eucrite
A. Pun, C. K. Shearer, J. J. Papike
  1551

The Chickulub Impact Structure: Shock Deformation and Target Composition
J. M. Quezada Muneton, L. E. Marvin, V. L. Sharpton, G. Ryder
  1552

Mass Spectrometric Observation of Organic Species in a Single IDP Thin Section
F. Radicati di Brozolo, R. H. Fleming
  1553

Neyterkob Coronae on Venus
J. Raitala, K. Kauhanen
  1554

The Linear "Un-Mixing" of Laboratory Thermal Infrared Spectra: Implications for the Thermal Emission Spectrometer (TES) Experiment, Mars Observer
M. S. Ramsey, P. R. Christensen
  1555

Geodynamic Signatures and Genesis of Anorthosite Massifs
A. S. P. Rao, K. Srinivas
  1556

A Search for Meteor Spectra from Meteor Showers Associated with S-type Near-Earth Asteroids
K. L. Reed
  1557

Solar-Proton Production of Neon and Argon
R. C. Reedy
  1558

Three New Chondrites from Namibia
A. M. Reid, P. Jakes, M. E. Zolensky, R. Miller
  1559

A Search for Large Impact Basins in the Southern Hemisphere of Mars II: South Polar B?
A.-M. Reidy, C. A. Sandford, H. Frey, R. A. Schultz
  1560

Pretoria Saltpan Impact Crater: Impact Glasses and Sulphide Spherules
W. U. Reimold, C. Koeberl
  1561

Kalkkop Crater in the Eastern Cape--A Good Candidate for an Impact Structure
W. U. Reimold, R. A. F. Grieve, G. Levin
  1562

A Magnetic Survey Across the Roter Kamm Impact Crater, Namibia
W. U. Reimold, A. M. Reid, P. Jakes, M. E. Zolensky, R. Miller
  1563

Significance of Komatiite: Thermal Emission Spectroscopy of Komatiite for Remote Sensing of Planetary Surfaces
D. P. Reyes
  1564

S-Process Isotope Anomalies: Neodymium, Samarium, and a Bit More of Strontium
S. Richter, U. Ott, F. Begemann
  1565

Measurement of Solar Wind Noble Gas Composition in Lunar Soils by In Vacuo Acid Etching
P. E. Rider, R. H. Becker, R. O. Pepin
  1566

Interplanetary Dust Particle L20005T12 Directly Linked to Type CM Chondrite Petrogenesis
F. J. M. Rietmeijer
  1567

Petrogenesis of Kimberlites and Related Magmas
A. E. Ringwood, W. Hibberson, N. Ware, S. E. Kesson
  1568

Volcanism and Rifting Along the Northern Edge of Lada Terra, Venus
K. M. Roberts, J. W. Head, M. G. Lancaster, J. E. Guest
  1569

On the Origin of Cretaceous-Tertiary Boundary Spinels
E. Robin, Ph. Bonte, L. Froget, C. Jehanno, R. Rocchia
  1570

Recent Volcanic Activity on Venus: Evidence from Emissivity Measurements
C. A. Robinson, J. A. Wood
  1571

Viking IRTM Analysis of Apollinaris Patera, Mars
M. S. Robinson, J. R. Zimbelman
  1572

Mariner 10 Color Images of the Eastern Limb and Farside of the Moon
M. S. Robinson, P. G. Lucey, B. R. Hawke, G. A. Smith
  1573

Statistics of Martian Craters Evidences for a Dense Atmosphere in the Past
Zh. F. Rodionova
  1574

Variable Size of the Crystallizing Boundary Layer During Formation of the Stillwater Layered Complex, Montana
D. K. Ross, D. Elthon
  1575

Channels and Basin Materials of Chryse and Acidalia Planitiae, Mars
S. L. Rotto, K. L. Tanaka
  1576

Chryse Planitia Region, Mars: A Summary of Geologic/Gemorphologic Mapping Results
S. L. Rotto, K. L. Tanaka
  1577

Analysis of Mars 1986 Seasonal South Polar CAP Spectrum
T. L. Roush, R. B. Singer
  1578

Analysis of Mariner 7 Thermal Infrared Spectra of Mars and Comparison to Recent Airborne Observations
T. L. Roush, T. Z. Martin, J. B. Pollack
  1579

Thermal Infrared Spectra (5.5-9.2a) of Mars Obtained from the Kuiper Airborne Observatory
T. L. Roush, F. C. Witteborn, J. Bregman, D. Rank, A. Graps, J. B. Pollack
  1580

Petrography of Metallic CU in Ordinary Chondrites
A. E. Rubin
  1581

Lineament Types as Evolutionary Stages for Development of Ridges/Scarps on Europa
M. Rudnyk, D. Pieri
  1582

Modelling Nitrogen Degassing in Chondrite Diamonds
S. S. Russell, C. T. Pillinger
  1583

Adrar 003: an Unequilibrated Ordinary Chondrite Rich in Pristine Interstellar Grains
S. S. Russell, J. W. Arden, C. T. Pillinger
  1584

Microfaulting of CAI Rim Layers and Relationships to the Fabric of the Leoville (CV3) Chondrite
A. Ruzicka, W. V. Boynton
  1585

Hydrocode Simulation of Explosive Disruption: External Pressure and Gravity
E. V. Ryan, E. Asphaug, H. J. Melosh
  1586

Lunar Highlands Totality from Bits and Pieces: A Whole-Rock-Chemistry-Free Characterization of an Evolved Hypabyssal Igneous Gabbro Schlieren from the Apollo 17 Landing Site
G. Ryder
  1587

The Size of Chondrule-forming Events
D. L. Sahagian, R. H. Hewins
  1588

Oceans on Mars: A Crater/Frequency Analysis by Elevation of the Northern Plains
J. F. Lockwood
  1589

Cooling of Ascending Magma on Venus and Earth
S. E. H. Sakimoto, M. T. Zuber, B. D. Marsh
  1590

The Role of Volume Scattering in Reducing Spectral Contrast of Reststrahlen Bands in Spectra of Powdered Minerals
J. W. Salisbury, A. E. Wald
  1591

The Detection of Methanol and Diamonds in Dense Molecular Clouds
S. A. Sandford, L. J. Allamandola, A. G. G. M. Tielens, T. Herbst
  1592

Is the Venusian Lithosphere Subducting?
D. T. Sandwell, G. Schubert
  1593

Science Questions for the Magellan Continuing Mission
R. S. Saunders, E. R. Stofan
  1594

The Uniform Distribution but Nonuniform Modification of Impact Craters on Venus
G. G. Schaber, H. J. Moore, R. G. Strom, J. M. Boyce
  1595

Volcanism on Triton
P. Schenk
  1596

An Unusual Thick Lava Flow in Ovda Regio, Venus
P. Schenk, H. J. Moore
  1597

The Simple-to-Complex Crater Transition on Venus
P. Schenk, V. L. Sharpton
  1598

Experiments of Investigate Atmospheric Effects on Crater Size
R. M. Schmidt
  1599

A Causal Relationship Between IR Peaking and Severe 13C Decline at the K/T Boundary
R. A. Schmitt, D. S. Twining
  1600

Volcanic Vents on Mars: Systematic Search and Classification
B. Schneid, R. Greeley
  1601

Mantle Dynamics and Tectonics on Venus
G. Schubert
  1602

Noble Gases in Metal and Silicates of the IIE Iron Meteorite Watson
L. Schultz, H. W. Weber
  1603

Impactor Signatures on Venus
P. H. Schultz
  1604

Wake-Blast Effects in Laboratory Experiments and on Venus
P. H. Schultz
  1605

On Surviving Atmospheric Entry
P. H. Schultz, D. E. Gault
  1606

Rio Cuarto Crater Field
P. H. Schultz, J. Grant, W. Collins, J. P. Lopez, A. J. Toselli, T. G. Castellanos
  1607

Limitations on the Applicability of Byerlee's Law and the Griffith Criterion to Shallow Crustal Conditions
R. A. Schultz
  1608

Progress on the Search for Strike-Slip Faulting on Venus
R. A. Schultz
  1609

What's the Difference Between a Rock and a Rock Mass (and Why Is It Important)?
R. A. Schultz
  1610

Growth of the Coprates Rise, Mars, as a Result of Lithospheric Folding
R. A. Schultz, K. L. Tanaka
  1611

Why are Strike-Slip Faults that are "Predicted" by Lithospheric Deformation Models Rarely Observed on Planetary Surfaces?
R. A. Schultz, M. T. Zuber
  1612

Preliminary Description of 60013, Bottom Half of Double Drive Tube 60014/60013
C. Schwarz
  1613

Mars Highland Channels: an Age Reassessment
D. H. Scott, J. M. Dohm
  1614

Tidal Dissipation and the Giant Impact Origin for the Moon
W. D. Sears
  1615

Continued Investigation of the Impact Flux on the Long Duration Exposure Facility by the Meteoroid and Debris Special Investigation Group
T. H. See, K. S. Mack, J. L. Warren, M. E. Zolensky
  1616

Organic Compounds in Black Veins of Barbotan (H5) and Charsonville (H6) Chondrites
V. P. Semenenko, N. V. Golovko
  1617

Highly Porous Fragments in Saratov (L4) Ordinary Chondrite
V. P. Semenenko, A. L. Girich, O. P. Sharkin
  1618

Composition and Structure of Black Veins in Barbotan (H5) and Charsonville (H6) Chondrites
V. P. Semenenko, G. M. Kolesov, A. Ljul
  1619

Lunar Meteorite MAC 88105: Petrology of Igneous Rock Clasts
A. S. Semenova, M. A. Nazarov, E. V. Guseva
  1620

Regional Topographic Rises on Venus: Geology of Western Eistla Regio, Beta Regio, and Atla Regio
D. A. Senske
  1621

Zones of Extension and Rifting on Venus: Characteristics and Distribution
D. A. Senske, J. W. Head
  1622

Minor Element Variations in Plagioclase
E. E. Shaffer, D. S. Burnett
  1623

Terrestrial Subglacial Landforms as Analogs for Martian Landscapes
J. Shaw, J. S. Kargel, R. G. Strom
  1624

Trace Element Zoning and Subsolidus Microstructure of Pigeonite in the Zagami Shergottite
C. K. Shearer, A. J. Brearley
  1625

Intra-Crystalline Behavior of Trace Elements in Pyroxene from Mare Basalts with Different fO2-Crystallization Histories
C. K. Shearer, J. J. Papike
  1626

Origin of Olivine Diogenites and Their Relationship to Basaltic Magmatism on the Eucrite Parent Body
C. K. Shearer, J. J. Papike
  1627

Relationship Between Apollo 12 High-Ti, Red-Picritic Glass and High-Ti Basaltic Magmatism
C. K. Shearer, J. J. Papike
  1628

Development of a Backscatter Mossbauer Spectrometer (BaMs) for Planetary Applications
T. D. Shelfer, M. M. Pimperl, E. L. Wills, D. G. Agresti, R. V. Morris
  1629

Volume and Surface Scattering Properties of Lunar Lake Playa, Nevada
M. K. Shepard, R. E. Arvidson, E. A. Guinness, D. W. Deering
  1630

Major Element Chemistry of Apollo 14 Mare Basalt Clasts and Highland Plutonic Clasts from Lunar Breccia 14321: Comparison with Neutron Activiation Results
J. W. Shervais, S. K. Vetter
  1631

K-Ca Age of Lunar Granites
C.-Y. Shih, H. Wiesmann, L. E. Nyquist
  1632

Interference-Shadow Mechanism of the Negative Polarization for Metallic Powdered Surface (Preliminary Results)
Yu. G. Shkuratov, A. S. Kachanov, G. Voylov, L. Ya. Melkumova, I. I. Latynina
  1633

Stratigraphic Evidence from Western North America for Multiple Impacts at the K/T Boundary
E. M. Shoemaker, G. A. Lzett
  1634

First Evidence for Live 60Fe in the Early Solar System
A. Shukolyukov, G. W. Lugmair
  1635

Noble Gases in the Omolon Pallasite
A. Shukolyukov, M. I. Petaev
  1636

Petrography, Composition and Origin of Chromian Spinel Crystals Separated from the Murchison Meteorite
S. B. Simon, L. Grossman
  1637

Scattering Properties of Venus' Surface
R. A. Simpson, G. L. Tyler, M. J. Maurer, E. Holmann
  1638

Composition of the Martian Crust: Evidence from Spectroscopy and SNC Meteorites
R. B. Singer, H. Y. McSween Jr.
  1639

Cross Section Measurements for the Production of Carbon-14 and Beryllium-10: Improved Estimates for Cosmogenic Nuclide Production Rates
J. M. Sisterson, A. M. Koehler, A. J. T. Jull, D. J. Donahue, L. McHargue, R. C. Reedy, P. A. J. Englert
  1640

Venus Gravity: Status and New Data Acquisitions
W. L. Sjogren
  1641

Glasses, Glassy Inclusions and Chondrules in the Kaidun Meteorite
Ya. A. Skripnik, K. I. Ignatenko, N. N. Kononkova, A. V. Ivanov
  1642

Energy Partitioning and Ejecta Escape for Normal and Oblique Impacts on Self Gravitating Planetary Systems
C. L. Smither, T. J. Ahrens
  1643

Tectonic Implications of Gravitational Spreading Models for Ishtar Terra, Venus
S. E. Smrekar, S. C. Solomon
  1644

Hydrous Silicates in the Upper Mantles of Terrestrial Planets
J. R. Smyth, T. C. McCormick
  1645

Large-Scale Convective Overturn of the Lunar Upper Mantle: Fact or Fancy?
G. A. Snyder, L. A. Taylor
  1646

Isotopic Constraints on the Lunar Upper Mantle: Evidence from High-Ti Basalts
G. A. Snyder, E. A. Jerde, L. A. Taylor, D.-C. Lee, A. N. Halliday
  1647

Nd and SR Isotopic Constraints on High-Ti Basalt Volcaniosm at Mare Tranquillitatis
G. A. Snyder, D.-C. Lee, L. A. Taylor, E. A. Jerde, A. N. Halliday
  1648

Zircon/Melt Partition Coefficients for the Rare-Earth Elements in Evolved Rocks: The Usefulness of Accessory Minerals in Petrogenetic Studies on the Earth and Moon
G. A. Snyder, L. A. Taylor, G. Crozaz
  1649

Combined Equilibrium and Fractional Crystallization of a Magma Ocean and Formation of the Upper Mantle of the Moon
G. A. Snyder, L. A. Taylor, C. R. Neal
  1650

Carbon Isotopic Composition of Precambrian Sediments Extracted by Stepped Combustion
R. A. Socki, C. S. Romanek, E. K. Gibson Jr., D. R. Stewart
  1651

Surface Effects of Impacts into Venus'Atmosphere
L. A. Soderblom, D. J. Chadwick, G. G. Schaber
  1652

Comparison of Lunar and Terrestrial Magma Oceans
V. S. Solomatov, D. J. Stevenson
  1653

Venus Tectonics: an Overview of Magellan Observations
S. C. Solomon, S. E. Smrekar, D. L. Bindschadler, R. E. Grimm, W. M. Kaula, G. E. McGill, R. J. Phillips, R. S. Saunders, G. Schubert
  1654

Topography of Tharsis Mons (Mars) Deduced from the ISM Experiment: Comparison with Radar Profiles
C. Sotin, S. Smrekar, Y. Rosenqvist, J. P. Bibring
  1655

ICP-MS Trace Element Analysis of Ureilites: Evidence for Mixing of Distinct Components
A. H. Spitz
  1656

Statistical Comparisons of Antarctic and Non-Antarctic Ureilites
A. H. Spitz
  1657

The Moon: Mid-Infrared (7.5-11.4 am) Spectroscopy of Five Selected Regions
A. L. Sprague, F. C. Witteborn, R. W. H. Kozlowski, D. P. Cruikshank
  1658

High Resolution Lunar Radar Studies--Preliminary Results
N. J. S. Stacy, D. B. Campbell, P. G. Ford
  1659

Longitudinal Variations of the Linear Polarization in Jupiter's Polar Regions
O. M. Starodubtseva, L. A. Akimov, V. V. Korochin, V. G. Teifel
  1660

Estimation of Solar-Flare-Induced Variation of Albedo for Atmosphereless Cosmic Bodies
L. V. Starukhina, Yu. G. Shkuratov
  1661

Olivine Zoning as Function of Crystallographic Orientation; Implications for Diffusion in Olivine
I. M. Steele
  1662

Crystal Structure of Natural Stanfieldite from the Imilac Pallasite
I. M. Steele, E. Olsen
  1663

TOF-SIMS Analysis of LDEF Impact Residues
T. Stephan, F. J. Stadermann, H.-G. Cramer, J. Zehnpfenning
  1664

Criteria for Magnetic Fields Regeneration in Accretion Disk Models of the Solar Nebula
T. F. Stepinski
  1665

On the Generation of Magnetic Fields in the Solar Nebula at the Location of the Present-Day Asteroid Belt
T. F. Stepinski, E. H. Levy
  1666

Imaging Detection of Atmospheric Sodium over the Lunar Terminator
S. A. Stern
  1667

Sm-Nd Chronology and Petrochemistry of Mesosiderites
B. W. Steward, D. A. Papanastassiou, G. J. Wasserburg
  1668

Generalized Theory for Planetesimal Dynamics
G. R. Stewart
  1669

Geologic Settings of Aeolian Features on Venus
E. R. Stofan, J. J. Plaut, R. Greeley, R. A. Arvidson, C. Elachi, M. A. Geringer, R. S. Saunders, G. Schubert, S. D. Wall, C. M. Weitz
  1670

High Latitude Radar-Dark Parabolic Markings on Venus
P. J. Stooke
  1671

Microtektite Hunting and Mineral Wool Shot
D. Storzer
  1672

A Kinetic Study of the Conversion of Hematite to Magnetite with Applications to the Metastability of Hematite on Venus
D. W. Straub, R. G. Burns
  1673

Physical Properties of Deucalionis, Eos, and Xanthe-type Units in the Central Equatorial Region of Mars
E. L. Strickland III
  1674

Global Resurfacing of Venus
R. G. Strom, G. G. Schaber, J. Arkani-Hamed, M. N. Toksoz
  1675

The EPR Study of Impact Diamonds from Astroblemes
S. N. Suchardjevskiy, G. I. Shafranovskii, E. L. Balmasov
  1676

Topographic Evolution of the Moon by Impacts During Heavy Bombardment
S. Sugita, T. Matsui
  1677

Three-Dimensional Stability Back-Analysis of Small Martian Avalanche Chutes
R. Sullivan
  1678

Oceanus Procellarum as Viewed by Galileo: Evidence for Compositional Diversity in the Mare Deposits and at the Marius Hills Plateau
J. M. Sunshine, C. M. Pieters, J. W. Head, A. S. McEwen, R. Greeley
  1679

Linear Mountain Belts and Related Deformation on Venus
J. Suppe, C. Connors
  1680

Antarctic Micrometeorites: Trace Element Contents and Textures of 50 to 100 microns Particles
S. R. Sutton, M. Prinz, M. Maurette, C. E. Nehru, M. K. Weisberg, S. Bajt
  1681

Computed Microtomography (CMT) of Extraterrestrial Objects Using a Linear Photodiode Array Detector
S. R. Sutton, P. Spanne, M. L. Rivers, K. W. Jones
  1682

Systematic Variations in Solar Wind Fluence with Lunar Location: Implications for Abundances of Solar-Wind-Implanted Volatiles
T. D. Swindle, M. K. Burkland, J. R. Johnson, S. M. Larson, R. V. Morris, B. Rizk, R. B. Singer
  1683

Chemical Compositions of Fremdlinge from a Type A Allende Inclusion
P. J. Sylvester, S. B. Simon, L. Grossman
  1684

A Model for the Internal Temperature Distribution of Micrometeorites During Atmospheric Entry Heating
P. P. Szydlik, G. J. Flynn
  1685

Atmospheric Effect on Cratering on Venus
T. Takata, T. J. Ahrens, R. J. Phillips
  1686

Mineralogy of a New Orthopyroxene-bearing Ureilite LEW88201 and the Relationship Between Magnesian Ureilities and Lodranites
H. Takeda, T. Baba, H. Mori, J. Saito
  1687

Mineralogy and Cooling Histories of Lunar Granulites and Related Lunar Meteorites
H. Takeda, M. Miyamoto, H. Mori
  1688

Experimental and Theoretical Analyses of Hypervelocity Penetration Parameters for Thin Films Flown in Space
W. G. Tanner, R. A. McDonald, W. M. Alexander, C. R. Maag
  1689

Elemental Distribution of U, Th, and PB in Peridotite Xenoliths: Implications for the PB Isotopic Evolution of the Moon
M. Tatsumoto, Y. Nakamura, W. R. Premo, F. R. Boyd
  1690

An Ilmenite Feedstock on the Moon: Beneficiation of Rocks Versus Soil
L. A. Taylor, D. S. McKay
  1691

Diamondiferous Eclogites from Yakutia, Siberia: Evidence for the Evolution of Cratons
L. A. Taylor, E. A. Jerde, G. Crozaz, N. V. Sobolev, V. N. Sobolev
  1692

Magnetic Beneficiation of High-Ti Mare Basalts: Petrographic Analyses
L. A. Taylor, D. S. McKay, J. Graf, A. Patchen, S. Wentworth, R. Oder, E. Jerde
  1693

The Experience of the Mars Normal Albedo and Limb Darkening Coefficients Mapping from the Observations During 1990 Opposition
V. G. Tejfel, N. V. Sinyaeva, A. N. Aksenov, G. A. Kharitonova
  1694

Fractionation Trends During Impact Comminution of Modally Controlled Regoliths
A. M. Therriault, F. Hoerz, M. J. Cintala, F. Cardenas, G. L. Haynes
  1695

Artificial "Regolith" of an Ice-Dust Body Under Space Conditions: Dust Mantle Dynamics and Phenomenology During KOSI 9
K. Thiel, E. Gruen, J. Gebhard, G. Kolzer
  1696

Mass Independent Isotope Effects: Recent Advances and Application to the Pre-Solar Nebula and Stratosphere
M. H. Thiemens
  1697

Carbon in Anhydrous Interplanetary Dust Particles: Correlations with Silicate Mineralogy and Sources of Anhydrous IDPS
K. L. Thomas, L. P. Keller, G. Blanford, W. Kloeck, D. S. McKay
  1698

Bulk Compositions, Mineralogy, and Trace Element Abundances of Six Interplanetary Dust Particles
K. L. Thomas, L. P. Keller, G. J. Flynn, S. R. Sutton, K. Takatori, D. S. McKay
  1699

Gaspra's Shape and Surface Features: Comparison with Small Satellites
P. C. Thomas, M. E. Davies, D. Simonelli, J. Veverka, M. Belton, The Galileo Imaging Team
  1700

Mars Quasi-Specular Echoes: Preliminary Results at 3.5-cm Wavelength
T. W. Thompson, T. C. O'Brien, R. F. Jurgens, M. A. Slade, H. J. Moore
  1701

Comparison of Automatically Generated DEM of Tithonium Chasma with USGS Interpolated Contour DEM
G. D. Thornhill, J. B. Murray, D. A. Rothery, T. Day, A. C. Cook, J. C. Iliffe, J. P. Muller
  1702

Distribution of Materials Excavated by the Lunar Crater Bullialdus: A Spectral Mixing Analysis
S. Tompkins, C. M. Pieters, J. F. Mustard, P. Pinet
  1703

Magma Ocean Formation Due to Giant Impacts: The Effect of the Planet's Thermal State Before the Collision
W. B. Tonks, H. J. Melosh
  1704

Geomorphic/Geologic Map of Audra Planitia Region on Venus Based on Magellan Radar image Mosaic CI-MIDR.60N070;1
T. Tormaenen
  1705

Tectonics of Southwestern Audra Planitia on Venus from Magellan Data: Evidence of Underthrusting
T. Tormaenen, J. Raitala
  1706

The Natural Thermoluminescence of Meteorites with High Al26 Contents: Unusual Orbital Histories in Ordinary Chondrites?
S. G. Traub-Metlay, P. H. Benoit
  1707

Establishment of a Thermoluminescence Facility at the University of Pittsburgh
S. G. Traub-Metlay, P. H. Benoit, W. Cassidy
  1708

The Parent Magma of the Nakhla (SNC) Meteorite: Constraints from Magmatic Inclusions in Olivine
A. H. Treiman
  1709

A New Ureilite: Preliminary Data on Nuevo Mercurio (B)
A. H. Treiman, J. L. Berkley
  1710

The Lafayette Meteorite: Preterrestrial Aqueous Alterations
A. H. Treiman, R. A. Barrett, J. L. Gooding
  1711

Effects of Aerogel Density on Intact Capture
P. Tsou, A. L. Albee
  1712

Response and Transmission Characteristics of Thin PVDF Copolymer Dust Detectors
A. J. Tuzzolino
  1713

Organic Mass Spectra of Shocked Murchison Meteorite
J. A. Tyburczy, T. N. Tingle, T. J. Ahrens, C. H. Becker
  1714

Geologic Mapping, Claritas Fossae Region, Mars: Progress Report
J. R. Underwood Jr.
  1715

On the Production of 26Al in the Supernova Shell
G. K. Ustinova, A. K. Lavrukhina
  1716

Palagonites and Martian Soil Simulants
D. T. Vaniman, G. Heiken, K. Wohletz, J. Blacic
  1717

Spectral Properties of CR Substituted Goethites and Hematities
R. K. Vempati, R. V. Morris, H. V. Lauer Jr.
  1718

Carbon, Nitrogen and Noble Gases in Diamond-rich Residues of the Efremovka CV3 Chondrite
A. B. Verchovsky, U. Ott, S. S. Russell, C. T. Pillinger, A. V. Fisenko, Yu. A. Shukolyukov
  1719

Collisional Model for Turbulent and Molecular Processes in Preplanetary Disk
M. Verronen, H. Vanhala
  1720

Whole Rock Major Element Chemistry of KREEP Basalt Clasts in Lunar Breccia 15205: Implications for the Petrogenesis of Volcanic KREEP Basalts
S. K. Vetter, J. W. Shervais
  1721

Ejecta Associated with Large Terrestrial Impacts: Implications for the Chicxulub Impact and K/T Boundary Stratigraphy
A. M. Vickery, D. A. Kring, H. J. Melosh
  1722

Volatiles, Their Ices and Clathrates in Early Solar Nebula
A. V. Vityazev, G. V. Pechernikova, Yu. F. Makogon
  1723

Cosmogenic Nuclides in the H3 Chondrite Dhajala
S. Vogt, G. F. Herzog, D. Fink, J. Klein, R. Middleton
  1724

Venus Degassing Model in K-Ar System
V. P. Volkov, M. Ya. Frenkel
  1725

Science Rationable for a Discovery Program Venus Atmospheric Probe Mission
R. W. Vorder Bruegge
  1726

REE in Minerals in Nakhla and Lafayette: A Comparative Study of Trace Element Microdistributions
M. Wadhwa, G. Crozaz
  1727

Angular Dependence of Spectral Emissivity of Quartz and Basalt
A. E. Wald, J. W. Salisbury
  1728

Rhenium-Osmium Isotope Sytematics in Chondrites and Iron Meteorites
R. J. Walker, J. W. Morgan, M. F. Horan, J. N. Grossman, R. S. Clarke
  1729

Volatiles on Mars: The Role of SO2
H. Waenke, G. Dreibus, E. Jagoutz, L. M. Mukhin
  1730

Coorbital Corotation Torque
W. R. Ward
  1731

A Compilation of Key Petrologic Information on Pristine Nonmare Moon Rocks
P. H. Warren
  1732

Inheritance of Magma Ocean Differentiation Through Lunar Origin by Giant Impact
P. H. Warren
  1733

Ureilites: The Graphite f(O2) Buffer, Explosive Volcanism, and the Gross Dissipation of Basalt from the Parent Asteroid(s)
P. H. Warren, G. W. Kallemeyn
  1734

Oxidizing Conditions in the Solar Nebula and the Origin of Chromite Chondrules
J. T. Wasson, A. N. Krot
  1735

A Globally Distributed Compressional Ridge System on Mars?
T. R. Watters
  1736

Impact Effects and Optical Scatter
A. J. Watts, D. R. Atkinson, L. B. Crowell, C. R. Coombs
  1737

Mineralogy and Chemistry of Refractory Inclusions in CR-like Chondrites from the Sahara Desert
D. Weber, A. Bischoff
  1738

Multizone Simulations of Planetary Accretion: Effects of Distant Perturbations
S. J. Weidenschilling, D. R. Davis
  1739

FEO-rich Silicates and Reduction Processes in the Unequilibrated Enstatite Chondrites
M. K. Weisberg, R. A. Fogel, M. Prinz
  1740

Two Possible Dune Fields on Venus
C. M. Weitz, C. Elachi, R. Blom, R. Greeley
  1741

Low-Emissivity Impact Craters on Venus
C. M. Weitz, H. J. Moore, G. G. Schaber
  1742

Investigation of Venusian Pyroclastic Volcanism
M. L. Wenrich, R. Greeley
  1743

Apollo 12 Ropy Glasses Revisited
S. J. Wentworth, D. S. McKay, D. D. Bogard
  1744

Simultaneous Growth and Orbital Evolution of Terrestrial and Asteroidal Embryos
G. W. Wetherill
  1745

Distribution of Lithospheric Failure and Volcanism in the Lunar Crisium Basin: Additional Signatures of an Oblique Multi-Ring Impact Structure
R. W. Wichman, P. H. Schultz
  1746

Morphologic Mapping of the Region from Northern Ovda Regio to Southern Tellus Regio, Venus
M. A. Wieczorek, M. J. Tatsumura, I. A. Leyva, K. Desmairis, J. Johnson, L. Koopowitz, R. Landheim, D. L. Bindschadler
  1747

Krypton and Xenon from Solar Energetic Particles in a Lunar Ilmenite
R. Wieler, H. Bauer, P. Signer
  1748

Automated Detection and Measurements of Small Volcanoes on Venus
C. R. Wiles, M. R. B. Forshaw
  1749

Lunar Farside Mare Deposits: Latest Galileo Imaging Results
D. A. Williams, R. Greeley
  1750

Growth and Thermal Evolution of Planetesimals
D. R. Williams, G. W. Wetherill, G. R. Stewart
  1751

Magma Reservoirs and Neutral Buoyancy Zones on Venus: Implications for the Formation and Evolution of Volcanic Landforms
L. Wilson, J. W. Head
  1752

The Antineutrino Luminosity of the Moon
T. L. Wilson
  1753

An Earth-Moon Baseline Neutrino Experiment
T. L. Wilson
  1754

Is There a Standard Model of the Moon?
T. L. Wilson
  1755

The Moon as a Scientific Laboratory
T. L. Wilson
  1756

Neutrino Astronomy of the Moon
T. L. Wilson
  1757

Compositional Differences Among Antarctic Populations: Discriminant Analysis of H Chondrites from Victoria Land and Queen Maud Land
S. F. Wolf, M. E. Lipschutz
  1758

Discovery of Planets Around a Millisecond Pulsar
A. Wolszczan
  1759

After Magellan: Concepts for the Next Generation of Venus Spacecraft
C. A. Wood, G. Blount
  1760

Venus: Surface Chemistry and Modification Processes
J. A. Wood
  1761

An Investigation of the Carbon in Different Lithologies of Zagami
I. P. Wright, C. T. Pillinger, M. M. Grady
  1762

Carbonaceous Chondrites: Co-Variation of Volatile Element Contents and Siderophile Element Ratios in Petrographic Types 2-6
X. Xiao, M. E. Lipschutz
  1763

Shock Vaporization of Granites: Experimental Results
O. I. Yakovlev, Yu. P. Dikov, M. V. Gerasimov
  1764

Bulk Composition of Yamato-793575 Classified as Carlisle Lakes-type Chondrite
K. Yanai
  1765

Silicate Jet Ejecta Mass and Geometry upon Oblique Impact
W. Yang, T. J. Ahrens
  1766

A Frost Model for Pluto's Surface: Implications for Pluto's Atmosphere
E. F. Yound, R. P. Binzel, S. A. Stern
  1767

Airburst Origin of Dark Shadows on Venus
K. J. Zahnle
  1768

Erosion of the Martian Atmosphere on Plasma Measurements
A. V. Zakharov
  1769

Inclusions in the Metal of ALH85085: New Clues to a Condensation Origin
B. Zanda
  1770

Linear and Weakly Non-Linear Variable Viscosity Convection in Spherical Shells
A. Zebib
  1771

The Effect of Target Properties on Cratering Mechanism
E. V. Zenchenko, V. M. Tsvetkov
  1772

The Spectra of Chemisorbed CO2 on Mars Analog Materials
A. P. Zent, T. L. Roush
  1773

Coupled Subsurface Atmosphere Boundary Layer Model of H2O on Mars: Sensitivity Studies
A. P. Zent, R. M. Haberle, H. Houben, B. M. Jakosky
  1774

Late-Stage Effusion and Mass-Wasting on Ascraeus Mons Volcano, Mars
J. R. Zimbelman
  1775

Volcanic and Modified Landforms on the Tharsis Montes, Mars
J. R. Zimbelman, K. S. Edgett
  1776

New Data on the Chondrite "Tuan TUC (L5-6)"
N. G. Zinovieva, O. B. Mitreikina, L. B. Granovsky
  1777

Thermal History of the Acapulco Meteorite
J. Zipfel, A. K. Kennedy, I. D. Hutcheon, B. Spettel, H. Palme
  1778

Mineralogy of Dark Clasts in CT Chondrites, Encrites and Howardites
M. E. Zolensky, M. K. Weisberg, P. C. Buchanan, M. Prinz, A. Reid, R. A. Barrett
  1779

A Model of the Physico-Chemical Evolution of the Venus Atmosphere as a Result of Volcanic CO2 Degassing
M. Yu. Zolotov
  1780

Pyrite-Magnetite or Magnetite-Hematite Mineral Assemblages as a Possible Buffer of the Composition of the Venus Atmosphere
M. Yu. Zolotov
  1781

Should Lithospheric Flexure Due to the Load of the Martian Polar Layered Deposits be Detectable with the Mars Observer Laser Altimeter?
M. T. Zuber
  1782

The Contribution of Dynamic Topography Due to Lithosphere Compression to the Structure of Mountain Belts and Ridge Belts on Venus
M. T. Zuber, E. M. Parmentier
  1783