Lunar and Planetary Institute






27st Lunar and Planetary Science Conference

TABLE OF CONTENTS

no.

Strength Versus Gravity Dominance in Catastrophic Impacts
T. J. Ahrens, S. G. Love
  1001

Gaseous Debris Flow Modeling of Martian Fluidized Ejecta Blankets
G. Akridge, D. W. G. Sears
  1002

New Potassium-Argon Ages for Georgiaites and the Upper Eocene Dry Branch Formation (Twiggs Clay Member): Inferences About Tektite Stratigraphic Occurrence
E. F. Albin, J. M. Wampler
  1003

OC Chondrule, Rim and Matrix Compositions: A Model
C. M. O'd. Alexander
  1004

Porosity of Chondrites: Some Regularities
V. A. Alexeev, N. S. Kuyunko
  1005

Cosmic Ray Variations and Meteorite Chronology
V. A. Alexeev, G. K. Ustinova
  1006

An Experimental Analog to Maturing Lunar Soil
C. C. Allen, R. V. Morris, D. S. McKay
  1007

Experimental Approaches to Space Weathering
C. C. Allen, R. V. Morris, D. S. McKay
  1008

The Meteorite-Asteroid Connection--Bridging the Gap Between Geology and Astronomy in the Secondary Grades
J. Allen, R. Luksch, M. Stocco, J. Garcia, M. Lindstrom, F. Vilas
  1009

The Search for Subsurface Ice Caps on Mercury
R. A. Allen, N. G. Barlow, F. Vilas
  1010

Thermal Convection in an Initially Compositionally Stratified Fluid Heated from Below: Application to a Model for the Evolution of the Moon
K. M. Alley, E. M. Parmentier
  1011

CA and TI Isotopic Compositions of Size-Separated SiC Fractions from the Murchison Meteorite
S. Amari, E. Zinner, R. S. Lewis
  1012

Global Sand Transport and Distribution on Mars
F. S. Anderson, E. Lo, R. Greeley
  1013

Processes Affecting the Formation and Degradation of Silicic Lava Flow Surface Boulders
S. W. Anderson, D. A. Crown, E. R. Stofan, J. J. Plaut
  1014

The Charnockitic Rocks of the Sand-Covered Morokweng Impact Structure, Southern Kalahari, South Africa: Evidence for a Possible Impact Melt Origin
M. A. G. Andreoli, L. D. Ashwal, R. J. Hart, M. Tredoux
  1015

Experimental Studies of Lunar Dark Halo Craters: Implications for Cryptomare Thickness Measurements
I. Antonenko, J. W. Head, M. Cintala, F. Horz
  1016

Lunar Meteorite QUE94281: A Possible Pair of Y793274 and/or EET87521
T. Arai, P. H. Warren, G. W. Kallemeyn
  1017

Shepherding in a Warm Disk of Low Optical Depth: A Perturbation Analysis
S. Araki, W. R. Ward
  1018

Calculating Metal-Silicate Equilibria in Meteoritic Igneous Systems
A. A. Ariskin, A. A. Borisov, M. I. Petaev
  1019

Relationships Between the Optical Constants and Spectroscopic Features of Particulate Quartz. Implications for Remote Sensing of Planetary Surfaces
G. E. Arnold, J. L. Bishop, K. Junghans, U. Schade
  1020

Ellipsometry, Reflectance and Emittance Spectrocopy of Quartz Particle Size Separates, Palagonitic Soils and Montmorillonite. Implications for Remote Sensing of Planetary Surfaces
G. E. Arnold, J. L. Bishop, U. Schade
  1021

The Motion of Disrupted Meteoroid in the Earth's Atmosphere - 3D Simulations
N. A. Artem'eva, V. V. Shuvalov, I. A. Trubetskaja
  1022

Geologic Analysis of Arecibo Radar Images of Mars
R. E. Arvidson, J. Harmon, B. Campbell, E. A. Guinness
  1023

The Dengli (H3.8) Chondrite is Regolithic Breccia with Small Exposure Age
S. S. Assonov, A. N. Yasevich, M. A. Ivanova, Yu. A. Shukolyukov
  1024

Akkruva Small Shield Plains: Definition of a Significant Regional Plains Unit on Venus
J. C. Aubele
  1025

Iron Oxides in Irghizites
D. D. Badjukov, F. Brandstaetter, T. L. Petrova, G. Kurat
  1026

The Saratov Chondrite Compressed at Ultra-High Shock Pressure
D. D. Badjukov, M. A. Nazarov, F. Brandstaetter, G. Kurat, E. A. Kozlov, Yu. N. Zhugin
  1027

Long-term Environmental Effects of the Chicxulub Impact
K. H. Baines, K. O. Pope, A. C. Ocampo, B. A. Ivanov
  1028

Carbon Characterization in Interplanetary Dust Particles with a Scanning Transmission X-ray Microscope
S. Bajt, H. N. Chapman, G. J. Flynn, L. P. Keller
  1029

A Seismic Investigation of the Interior of a Comet
W. B. Banerdt, T. Pike, R. Martin, P. Lognonne
  1030

Atmospheric Origin of Flow Lobes Around Craters on Mars and Venus
O. S. Barnouin-Jha, P. H. Schultz
  1031

Carbon in the Metal of Iron Meteorites
N. Bashir, J. R. Beckett, I. D. Hutcheon, E. M. Stolper
  1032

Geologic Mapping of V17 Beta Regio Quadrangle: Preliminary Results
A. T. Basilevsky
  1033

On the Stratigraphic Significance of Wrinkle Ridges on Venus
A. T. Basilevsky
  1034

Regional and Global Stratigraphy of Venus: A Preliminary Assessment and Implications for the Geologic History of Venus
A. T. Basilevsky, J. W. Head
  1035

Venus: Crater Chronology Overview and Geophysical Implications
A. T. Basilevsky, J. W. Head
  1036

Stratigraphy of Venusian Plains: Comparison of Price [1995] and Basilevsky and Head [1995] Units
A. T. Basilevsky, G. A. Burba, V. P. Kryuchkov
  1037

Comparison of Agglutinates from Apollo Sites
A. Basu, D. S. McKay
  1038

Metal Globules in Agglutinatic Glass
A. Basu, M. Dorais, D. S. McKay
  1039

IRTF Observations of Saturn-Earth Ring Plane Crossing: Faint Outer Ring Near-IR Profiles
J. Bauer, J. J. Lissauer, M. Simon
  1040

The Source Mineralogy of High- and Low-Ti Basalts Based on Their HF Isotopic Composition
B. L. Beard, L. A. Taylor, E. E. Scherer, C. M. Johnson, G. A. Snyder
  1041

Reevaluation of the Solar Wind 36Ar/38Ar Ratio
R. H. Becker, D. J. Schlutter, P. E. Rider, R. O. Pepin
  1042

Intensive and Bulk Compositional Controls on Hydrothermally Altered Mafic Rocks--Implications on the Study of Martian Hydrothermal Metamorphism
R. E. Beiersdorfer, D. W. Ming
  1043

HST WFPC2 Observations of Mars Surface Mineralogy and Atmospheric Condensates
J. F. Bell III, A. E. Switala, D. Crisp, WFPC2 Science Team
  1044

Calibration and Mineralogic Analysis of HST Images of Mars Obtained During 1994-1995
J. F. Bell III, M. J. Wolff, P. B. James, R. T. Clancy, S. W. Lee, L. J. Martin
  1045

Small Scale Heterogeneities in K/T Boundary Tektites From Mimbral
M. S. Bell, V. L. Sharpton
  1046

Activities in Planetary Geology
K. C. Bender, R. Greeley, R. Pappalardo
  1047

Catastrophic Impact During Differentiation of the IAB-Winonaite Parent Asteroid
G. K. Benedix, S. G. Love, E. R. D. Scott, K. Keil, G. J. Taylor, T. J. McCoy
  1048

Reheated Ordinary Chondrites: The Record of Small Perihelia and Impacts Over the Last Million Years
P. H. Benoit
  1049

The Pairing of Meteorite Finds
P. H. Benoit, J. M. Cunningham, P. A. Bland, F. J. Berry, C. T. Pillinger
  1050

The Irradiation and Recent Thermal History of QUE 94281 and Other Lunar Meteorites: Evidence for Short Transit Times
P. H. Benoit, S. J. K. Symes, D. W. G. Sears
  1051

Constraints on Stellar Grain Formation from Circumstellar Graphite in the Murchison Meteorite
T. J. Bernatowicz, R. Cowsik, S. Amari, R. S. Lewis
  1052

Aluminum-rich Orbital Debris Colliding With LDEF's Trailing Edge
R. P. Bernhard, F. Horz, D. E. Kessler
  1053

A Profile of Martian Mantle Mineralogy and Density up to Core-Mantle Boundary Pressures
C. M. Bertka, Y. Fei
  1054

Implications of Laboratory Infrared Reflectance Spectra for Finding H2S on Io
B. H. Betts, D. B. Nash
  1055

Successful Components of Planetary Science Field Trips
B. H. Betts, R. Kenealy, D. B. Nash
  1056

The European Space Exposure Facility
J.-P. Bibring, J. Borg, A. Chardin, P. Salvetat, B. Vassent, T. Stevenson, J. A. M. McDonnell, H. Jolly, J.-C. Mandeville, C. Maag, T. Bunch
  1057

Geophysical Constraints on the Deep Interior of Mars: Present Status and Future Prospects
B. G. Bills
  1058

Visible and Infrared Reflectance Spectroscopy of Physical and Chemical Ferric-Smectite Mixtures as Mars Soil Analogs
J. L. Bishop
  1059

The Influence of Fine-Grained Hematite Powder on the Spectral Properties of Mars Soil Analogs; VIS-NIR Bi-Directional Reflectance Spectroscopy of Mixtures
J. L. Bishop, A. Dummel
  1060

The Icy Galilean Satellites: 70 CM Wavelength Radar Properties
G. J. Black, D. B. Campbell, S. J. Ostro
  1061

Sulfate Formation on Mars by Volcanic Aerosols: A New Look
D. L. Blaney
  1062

Removal of Brightness Artifacts from the Panoramas of Mars Surface Received from Phobos-2 Spacecraft
I. M. Bockstein, Yu. M. Gektin
  1063

39Ar-40Ar Ages of Acapulcoites and Early Parent Body Metamorphism
D. D. Bogard, D. H. Garrison
  1064

Sm-Nd System in Divnoe Meteorite
O. Bogdanovski, E. Jagoutz
  1065

Correlation Between Radar and Optical Images of Lunar Surface
N. Bondarenko, Yu. G. Shkuratov, M. Kreslavsky
  1066

Fe and NI Solubility in Silicate Melts Equilibrated with Metal
A. Borisov, A. Ariskin
  1067

Interacting Atmospheric Plumes from Bolide Swarms
M. B. Boslough, D. A. Crawford
  1068

NMR Spectroscopy of Shocked Quartz from Experimental Impact Craters
M. B. Boslough, R. T. Cygan, D. A. Crawford, R. J. Kirkpatrick
  1069

Forming a Jupiter-like Companion for 51 Pegasi
A. P. Boss
  1070

Nonaxisymmetry in the Solar Nebula: Disk Evolution or Giant Gaseous Protoplanet Formation?
A. P. Boss
  1071

Impact Melt from the Deep Ocean Impact of the Eltanin Asteroid
J. A. Bostwick, F. T. Kyte, R. Gersonde
  1072

Doublet Craters on Mars
W. F. Bottke Jr., H. J. Melosh
  1073

Modal Abundances in Diogenites: Insights into Phase Percentages Using Electron Microprobe Techniques
L. E. Bowman, J. J. Papike, M. N. Spilde
  1074

Radiation Processing and the Origins of Interplanetary Dust
J. P. Bradley, C. Dukes, R. Baragiola, L. McFadden, R. E. Johnson, D. E. Brownlee
  1075

Relative Age Determination from 1:1.5 Million Geological Mapping, Sapas Mons FMAP, Venus
G. R. Brakenridge
  1076

Geophysical Signatures of the Roter Kamm Impact Crater, Namibia
D. Brandt, W. U. Reimold, L. Wendorf, C. Koeberl, J. Grant
  1077

An Update on the I-Xe Chronometer
R. H. Brazzle, C. M. Hohenberg
  1078

Compositional and Mineralogical Trends in Fine-Grained Chondrule Rims in CO Chondrites
A. J. Brearley
  1079

Grain Size Distributions and Textures in the Matrices of Metamorphosed CO3 Chondrites
A. J. Brearley
  1080

Dark Inclusions in the Allende Meteorite: New Insights from Transmission Electron Microscopy
A. J. Brearley, M. Prinz
  1081

Trace Element (REE, Y, Sr, Mn) Abundances in Carbonates in CM Chondrites
A. J. Brearley, C. K. Shearer, G. W. Fowler
  1082

Formation and Modification Ages of Some Steep-sided Domes on Venus
N. T. Bridges, G. E. McGill
  1083

The Parent Asteroids of Ordinary Chondrite Meteorites
D. T. Britt
  1084

The Thermal Evolution of Venus as Recorded by Surface Tectonics
C. D. Brown, R. E. Grimm
  1085

Tochilinite: A Sensitive Indicator of Alteration Conditions on the CM Asteroidal Parent Body
L. B. Browning, W. L. Bourcier
  1086

Planetary Gamma-Ray Spectroscopy of a Comet Surface
J. Bruckner, J. Masarik
  1087

Analysis of Deformation Lamellae in Quartz Grains from the Rooiberg Felsite, Bushveld Complex, South Africa, and Associated Rocks
P. C. Buchanan, W. U. Reimold
  1088

Analysis of Dark Inclusions from Allende
P. C. Buchanan, M. E. Zolensky, S. J. Wentworth, A. M. Reid
  1089

Basalt Thickness in Mare Humorum: New Method and Results
C. J. Budney, P. G. Lucey
  1090

An Examination of the Transport and Emplacement of Long Run-Out Debris Masses Associated with Modified Domes on Venus
M. H. Bulmer
  1091

A Compositional Study of Lunar Sinuous Rilles
D. B. J. Bussey, P. D. Spudis
  1092

Analysis of Venusian Canali, Determination of Emplacement Direction
D. B. J. Bussey, S.-A. Sorensen, J. E. Guest
  1093

Ice-Rind or Why the Vertical Erosion of Martian Fluvial Valleys is not Coherent with Their Slopes
N. A. Cabrol, E. A. Grin
  1094

Rover Mobility and Sampling Strategy on Mars: The Case for Gusev Crater
N. A. Cabrol, E. A. Grin, V. C. Gulick, C. P. McKay, R. Greeley, M. Sims, G. Briggs
  1095

The Supernova Trigger Revisited
A. G. W. Cameron
  1096

Deriving Venus Surface Properties from Backscatter and Emission Data
B. A. Campbell
  1097

Accretion of the Moon from an Impact Generated Disk
R. M. Canup, H. F. Levison, G. R. Stewart, L. W. Esposito
  1098

Solubility of RU and Pd in Silicate Melts: The Effect of Melt Composition
C. J. Capobianco, R. L. Hervig
  1099

Magmatic Iron Meteorite Petrogenesis: Partitioning of AG and Pd Between Solid and Liquid Metal
N. L. Chabot, M. J. Drake
  1100

Thermal Erosion by Lava: A Comparison of Theoretical and Experimental Modeling
D. Challis, R. Greeley
  1101

Numerical Integrations of the Accretion of Planetary Embryos
J. E. Chambers, G. W. Wetherill
  1102

The Evolution of Parga Chasma and Coronae Growth on Venus
M. G. Chapman
  1103

Boron and Lithium Isotope Variations in Chondrules: The Signature of Presolar Nucleosynthesis
M. Chaussidon, F. Robert
  1104

Live 107Pd in Some Group II and III Irons and the Time-Scales of Fe-Ni Segregations in the Early Solar System
J. H. Chen, G. J. Wasserburg
  1105

The High-Pressure Assemblage Majorite-Pyrope Solid Solution + Magnesiowustite: A New Constraint on the High Pressure and Temperature History of Shock Melt Veins in Chondrites
M. Chen, T. G. Sharp, A. El Goresy, B. Wopenka, X. Xie
  1106

Sample Collection from Planetary Surfaces
A. F. Cheng, C. M. Pieters, S. L. Murchie
  1107

Gruithuisen Domes Region: A Candidate for a Large Extended Lunar Nonmare Volcanism Unit
S. D. Chevrel, P. C. Pinet, J. W. Head
  1108

INTERMARSNET: A Joint ESA/NASA Mission to Mars in 2003
A. F. Chicarro
  1109

Survival and Destruction of Interstellar Solids During the Formation of the Solar System
K. M. Chick, P. Cassen
  1110

Mineralogy and Cooling History of FRO90054 Compared to Other Ureilites
J. Chikami, T. Mikouchi, M. Miyamoto, H. Takeda
  1111

Pallasites--Chemical Compositions and Relationship to IIIAB Irons
B.-G. Choi, J. T. Wasson
  1112

New News and the Competing Views of Asteroid Belt Geology
B. E. Clark
  1113

The Lunar Crust as Case Study: A Comparison of Iron Data Derived From Geochemical and Mineralogical Remote Sensing Techniques
P. E. Clark, L. A. McFadden
  1114

Indigenous Polycyclic Aromatic Hydrocarbon Molecules in Circumstellar Graphite Grains
S. J. Clemett, S. Messenger, X. D. F. Chillier, X. Gao, R. M. Walker, R. N. Zare
  1115

Hydraulic and Thermal Constraints on the Development of the Martian Valley Networks
S. M. Clifford
  1116

Is Mars Water-rich? Optimal Landing Site Locations for the Geophysical Detection of Subpermafrost Groundwater
S. M. Clifford
  1117

Constraints on the Organic Component on Asteroid Surfaces
E. A. Cloutis
  1118

Spectral Properties of Hydrocarbon-bearing Geological Materials
E. A. Cloutis
  1119

Shocked Quartz, Ir, Sr, and OS Anomalies Found in the Late Eocene at Massignano (Ancona, Italy): Clear Evidence of a Bolide Impact
A. K. Clymer, H. B. Vonhof, T. Meisel, D. M. Bice, A. Montanari
  1120

An Examination of Minimum Paleoflow Conditions for the Martian Outflow Channel: Maja Valles
K. J. Cole
  1121

Criteria for Determination of Volcanic Embayment of Impact Craters on Venus
G. C. Collins, J. W. Head
  1122

Impact Crater Embayment on Venus and the Termination of Global Resurfacing
G. C. Collins, A. T. Basilevsky, J. W. Head, M. A. Ivanov
  1123

Compound Chondrules and Igneous Rims: Multiple Heating of Chondrules
H. C. Connolly Jr., R. H. Hewins
  1124

Preliminary Analysis of Clementine Imagery of the Alpine Valley
A. C. Cook, H. Hiesinger
  1125

Using GIS (Geographic Information System) Technology to Assess the Resource Potential of Lunar Pyroclastic Deposits
C. R. Coombs
  1126

VIRTIS Visible Infrared Thermal Imaging Spectrometer for Rosetta Mission
A. Coradini, F. Capaccioni, M. T. Capria, P. Cerroni, M. C. de Sanctis, G. Magni, F. Reininger, P. Drossart, M. A. Barucci, D. Bockelee-Morvan, M. Combes, J. Crovisier, T. Encrenaz, D. Tiphene, G. Arnold, U. Carsenty, H. Michaelis, S. Mottola, G. Neukum, U. Schade, F. Taylor, S. Calcutt, T. Vellacott, P. Venters, R. E. Watkins, G. Bellucci, V. Formisano, F. Angrilli, G. Bianchini, B. Saggin, E. Bussoletti, L. Colangeli, V. Mennella, S. Fonti, G. Tozzi, J. P. Bibring, Y. Langevin, B. Schmitt, M. Combi, U. Fink, T. McCord, W. Ip, R. W. Carlson, D. E. Jennings
  1127

Imaging Spectroscopy for Lunar Exploration: LUVIMS
A. Coradini, M. C. de Sanctis, F. Reininger, R. Bonsignori, G. Racca, A. Chicarro
  1128

Evidence for a Major Impact Structure in the Northwest Province of South Africa - The Morokweng Impact Structure
B. Corner, W. U. Reimold, D. Brandt, C. Koeberl
  1129

Porosity and Permeability Determinations of Chondritic Materials
C. M. Corrigan, M. E. Zolensky, M. Long, C. A. Sapp, J. M. Dahl
  1130

Martian Fluvial-Thermal Erosion: Laboratory Simulation
F. Costard, J. Aguirre-Puente, R. Greeley, G. Guillemet, N. Makhloufi
  1131

The Mechanism for Forming Martian Rampart Craters: Clues from Crater Morphometry
R. A. Craddock, F. Chuang
  1132

Estimates of the Range in Flow Velocities Associated with the Circum-Chryse Outflow Channels
R. A. Craddock, K. L. Tanaka
  1133

An Analytical Model of Meteoroid Entry into Planetary Atmospheres
D. A. Crawford
  1134

Using HST Plume Height Data to Place Lower Bounds on Comet Shoemaker-Levy 9 Fragment Mass and Penetration Depth
D. A. Crawford, M. B. Boslough
  1135

Downflow Morphologic Variations in Hawaiian Lava Flows: Implications for Modeling Planetary Lava Flow Emplacement
D. A. Crown, M. N. Peitersen
  1136

The Significance of Rock Abundances at the Viking Lander Sites: Implications for Mars Pathfinder and Surveyor Landers
L. S. Crumpler
  1137

Large Shield Volcanoes on Venus: Stratigraphic Relationships with Surrounding Tectonic Features and Geologic Units
L. S. Crumpler, J. W. Head, J. C. Aubele
  1138

Regional Stress Patterns, Magma Reservoirs, and Calderas on Mars
L. S. Crumpler, J. W. Head, J. C. Aubele
  1139

Determination of Cratering Rates in the Earth-Moon System by Lunar Spherules
T. S. Culler, R. A. Muller, P. Renne
  1140

Estimation of the Terrestrial Age of Antarctic Ordinary Chondrites Using Fusion Crust
J. M. Cunningham, P. H. Benoit, D. W. G. Sears
  1141

NMR Relaxation Behavior of Moderately Shocked Sandstone from Meteor Crater, Arizona
R. T. Cygan, M. B. Boslough, S. A. Myers, R. A. Assink
  1142

40Ar/39Ar Laser Step Heating Ages of Some Apollo 17 Melt Rocks and the Age of the Serenitatis Impact
G. B. Dalrymple, G. Ryder
  1143

The National Space Grant College and Fellowship Program: The First Five Years 1989-1994
J. Dasch, E. Ward
  1144

Fire Fountains on Io
A. G. Davies
  1145

The Effect of Cooling Rate on Melilite/Liquid Partition Coefficients for Y and REE in Type B CAI Melts
A. M. Davis, F. M. Richter, S. B. Simon, L. Grossman
  1146

Short Period Comets: Primordial Bodies or Collisional Fragments?
D. R. Davis, P. Farinella
  1147

Martian Highland Troughs: Regional Controls of Runoff and Sedimentation
R. A. de Hon
  1148

Degree of Melting in Chondrule Simulation Experiments
A. de La Cruz, S. V. Maharaj, R. H. Hewins
  1149

Comparison of Quantitative Synchrotron MicroXANES (SmX) Fe^III/(Fe^II + Fe^III) Results for Amphibole and Silicate Glass with Independent Measurements
J. S. Delaney, S. Bajt, M. D. Dyar, S. R. Sutton, G. McKay, P. Roeder
  1150

Apollo 14 Green Volcanic Glasses with a Compositional Memory of Melting Processes in the Lunar Mantle
J. W. Delano
  1151

Compositional Range of Primary Magmas Observed Among the Apollo 17 Orange Volcanic Glasses (74220)
J. W. Delano
  1152

Liquid Immiscibility: Cause of Compositional Heterogeneity in Tektites
J. W. Delano, B. Hanson
  1153

Origin of Water in Meteorites: Ion-Probe Determinations of D/H Ratios in Chondrules
E. Deloule, F. Robert
  1154

Experimental REE Partitioning in Oldhamite: Implications for the Igneous Origin of Aubritic Oldhamite
T. L. Dickinson, T. J. McCoy
  1155

High-Temperature Vaporization of Mg-Ca-Carbonate-Sulfate-Quartz-Alumina Targets
Yu. P. Dikov, M. V. Gerasimov, O. I. Yakovlev, F. Wlotzka
  1156

Chemical Zoning of the Surface Layers in Luna-16 Soil Sample 1635: High Enrichment of Carbon
Yu. P. Dikov, I. V. Ivanov, F. Wlotzka, E. M. Galimov
  1157

Thaumasia Region of Mars: Chronology and Regional Distribution of Fault and Ridge Systems and Other Significant Structures
J. M. Dohm, K. L. Tanaka
  1158

Formation of Grooved Terrain on Ganymede: Extensional Instability Mediated by Cold, Diffusional Creep
A. J. Dombard, W. B. McKinnon
  1159

Bidirectional Surface Reflection Modeled Using Microscopic Roughness
D. Domingue, A. Cheng
  1160

A Model of the Protoplanetary Disk at the Formation Stage
V. A. Dorofeyeva, A. B. Makalkin
  1161

Phosphate-Mobilization on Mars? Implication from Leach Experiments on SNC's
G. Dreibus, E. Jagoutz, B. Spettel, H. Wanke
  1162

Formation of Impact Breccias at the Slate Islands Structure, Northern Lake Superior, Ontario, Canada
B. O. Dressler, V. L. Sharpton, B. Schnieders, J. Scott
  1163

Gamma-Ray Spectroscopy for the Investigation of the Comet Chemical Composition on Board Champollion
C. D'Uston, V. Borrel, W. V. Boynton, J. Brueckner, J. Klinger, R. C. Reedy, B. Schmitt, J. I. Trombka
  1164

Redistribution of Trace Elements During Metamorphism of Ordinary Chondrites
M. Ebihara, K. Shinotsuka, P. Kong
  1165

Local and Global Networks from Mars96 HRSC and WAOSS Imagery
H. Ebner, T. Ohlhof
  1166

Chemical Composition of Martian Surface and Rocks on Pathfinder Mission: The Alpha-Proton-X-Ray Spectrometer
T. Economou, A. Turkevich, R. Rieder, H. Wanke
  1167

Global Digital Mapping of the Moon
K. E. Edwards, T. R. Colvin, T. L. Becker, D. Cook, M. E. Davies, T. C. Duxbury, E. M. Eliason, E. M. Lee, A. S. McEwen, H. Morgan, M. S. Robinson, T. Sorensen
  1168

Water Contents of Micrometeorites from Antarctica
C. Engrand, E. Deloule, P. Hoppe, G. Kurat, M. Maurette, F. Robert
  1169

Composite Spectra of Mars, 0.4-3.7 Micrometers
S. Erard, W. Calvin
  1170

Volatile Depletion in the Inner Solar System: Rayleigh Distillation and Potassium Isotopes
T. M. Esat
  1171

Lunar Meteorite QUE94269 - Pairing with QUE93069 Confirmed. Lunar Meteorite QUE94281 - Similarity with Y-793274
O. Eugster, E. Polnau
  1172

Two Different Ejection Events for Basaltic Shergottites QUE94201, Zagami and Shergotty (2.6 MA Ago) and Lherzolitic Shergottites LEW88516 and ALH77005(3.5 MA Ago)
O. Eugster, A. Weigel, E. Polnau
  1173

Thick Target Experiments and Monte Carlo Calculations for Planetary Gamma Ray Spectroscopy
U. Fabian, J. Masarik, J. Bruckner, M. Koenen, H. Wanke, P. A. J. Englert, D. M. Drake, V. Druke, R. D. Neef, D. Filges
  1174

Emplacement Mechanisms of Volcanic Materials on Mars
S. A. Fagents
  1175

The State of the Martian Core
Y. Fei, C. M. Bertka
  1176

Some Pecularities of Solidification of the Almandine Impact Melt
V. I. Feldman, E. A. Kozlov, Yu. N. Zhugin
  1177

The Lunar Prospector Gamma-Ray Spectrometer
W. C. Feldman, A. B. Binder, G. S. Hubbard, R. E. McMurry Jr., M. C. Miller, T. H. Prettyman
  1178

Cosmogenic-radionuclide Profile of the Mocs Meteorite Strewnfield
T. E. Ferko, M. E. Lipschutz
  1179

Modeling Lava Domes as Temperature-dependent Bingham Materials
J. H. Fink, R. W. Griffiths
  1180

The Analyses of Oxidation Process and TL of the Allende Diamond
A. V. Fisenko, L. F. Semjonova, V. F. Tatsy, L. L. Kashkarov, L. N. Bolsheva
  1181

Isotopic Composition of Carbon in Colloidal and Non-Colloidal Diamonds from Efremovka
A. V. Fisenko, A. B. Verchovsky, L. F. Semejenova, C. T. Pillinger
  1182

Are the S-Type Asteroids the Parent Bodies of Ordinary Chondrite Meteorites?: Evidence from the Interplanetary Dust Recovered from the Earth's Stratosphere
G. J. Flynn
  1183

Evidence for Weakly Bound Bromine in Large Interplanetary Dust Particles Collected from the Stratosphere
G. J. Flynn, S. Bajt, S. R. Sutton
  1184

In-Situ Chemical Analysis of Extraterrestrial Material Captured in Aerogel
G. J. Flynn, F. Horz, S. Bajt, S. R. Sutton
  1185

The Solubility of CaS in Aubrite Silicate Melts
R. A. Fogel, M. K. Weisberg, M. Prinz
  1186

Analysis of Fault Lengths Across Valles Marineris, Mars
A. N. Fori, R. A. Schultz
  1187

Patterns in the Distribution of Small Volcanoes Around Coronae of Different Morphologies on the Surface of Venus
A. A. Fosse, M. Ellison, G. Komatsu
  1188

Injection of Radioactive Nuclides from the Stellar Outflow that Triggered the Collapse of the Presolar Nebula
P. N. Foster, A. P. Boss
  1189

Organic Matter from H2O and CO2 Dissolved in Minerals
F. Freund, A. Gupta, D. Kumar
  1190

Regional Crustal Thickness Variations on Mars
H. V. Frey, B. G. Bills, S. N. Lyons, J. H. Roark
  1191

FeO and TiO2 Variations in Mare Imbrium
R. C. Friedman, D. T. Blewett, G. J. Taylor, P. G. Lucey
  1192

Noble Gas Analysis of the Julesburg L3.6, Tulia H4, Y-86789 Thermally Metamorphosed CM, and Allende CV3 Chondrites by Crushing Method
D. Fukuda, T. Nakamura, N. Takaoka, K. Nagao
  1193

Analyses of Galileo SSI Data from EM2: Scattered Light Effects
L. Gaddis, A. S. McEwen, T. Becker
  1194

The Effect of Variable fO2/fS2 Conditions on Wetting Angles in Olivine/Sulfide Melt Aggregates: Mobility of Sulfide Melt in the Earth's Upper Mantle
G. A. Gaetani, T. L. Grove
  1195

Asteroid 6 Hebe: Spectral Evaluation of the Prime Large Mainbelt Ordinary Chondrite Parent Body Candidate with Implications from Space Weathering of Gaspra and the Ida-Dactyl System
M. J. Gaffey
  1196

Cosmic Ray Exposure Ages and Trapped Noble Gases in Two Acapulcoites and Two Lodranites: A Common Origin?
D. H. Garrison, D. D. Bogard
  1197

Determination of ~2 MA Average Flux and Rigidity for Energetic Solar Protons from Lunar Rock 61016
D. H. Garrison, D. D. Bogard, M. N. Rao, R. C. Reedy
  1198

An Analysis of the Mapping Sonar on the 'Huygens' Probe to Titan
J. R. C. Garry
  1199

Atmospheric Alteration in Fine-Grained Antarctic Micrometeorites
M. J. Genge, M. M. Grady, R. Hutchison
  1200

Reduction of Carbon During High-Temperature Vaporization in the Calcium-Carbonate-Silicate System
M. V. Gerasimov, Yu. P. Dikov, O. I. Yakovlev, F. Wlotzka
  1201

Localised Plate Motion on Venus
R. C. Ghail
  1202

The Evolution of Large Coronae
R. C. Ghail
  1203

An Extended Thermal History (100 MA Long) for Asteroid 4 Vesta Based on Radionuclide and Collisional Heating
A. Ghosh, H. Y. McSween Jr.
  1204

High Resolution Digital Terrain Models of Asteroid Ida: A Comparison Between Photogrammetry and the Shape-from-Shading Method
B. Giese, J. Oberst, R. L. Kirk, W. Zeitler
  1205

Adding Dimensions to the Lunar Geologic Map Using GIS
T. A. Giguere, D. T. Blewett, P. G. Lucey, G. J. Taylor, B. R. Hawke
  1206

The Composition and Geologic Setting of Lunar Far Side Maria
J. J. Gillis, P. D. Spudis
  1207

Evidence for Collisional Tectonics at Tellus Regio Tessera, Venus
M. S. Gilmore, J. W. Head
  1208

Investigation of the Application of Aerobot Technology at Venus
M. S. Gilmore, J. W. Head, J. A. Cutts, K. T. Nock, G. Collins, L. S. Crumpler, A. V. Decharon, M. Parry, R. A. Yingst
  1209

Deformation of Craters on Tessera Terrain, Venus
M. S. Gilmore, M. I. Ivanov, J. W. Head III, A. T. Basilevsky
  1210

Towards a Self-Consistent Model of Lunar and Martian Meteorite Delivery
B. Gladman, J. A. Burns
  1211

More Upper Eocene (North American?) Tektites and Impact Ejecta Off New Jersey
B. P. Glass, C. M. G. McHugh
  1212

The Role of Garnet in Martian Mantle Evolution: Further Evidence from Shergottite Rare Earth Patterns
J. D. Gleason, D. A. Kring, W. V. Boynton
  1213

Occurrence of a Titanium-bearing Jarosite from Hawaii
D. C. Golden, R. V. Morris, D. W. Ming, J. F. Bell III, S. V. Yang, D. R. Thompson
  1214

Mars Pathfinder Landing Site Selection Process
M. Golombek
  1215

Size-Frequency Distributions of Rocks on Mars
M. Golombek, D. Rapp
  1216

Strike Slip Tectonics on Enceladus
D. Gomez, O. Prieto, M. A. Rodriguez
  1217

The Meteorite Teaching Package Programme of the Natural History Museum
M. M. Grady, R. Hutchison
  1218

Nitrogen and Argon in ALH 84001 Revisited: Unravelling a Martian Atmospheric Component
M. M. Grady, I. P. Wright, C. T. Pillinger
  1219

A Search Strategy for Aluminum in the Lunar Atmosphere
F. G. Graham
  1220

Carbon Stable Isotope Analyses of Antarctic Micrometeorites
G. A. Graham, I. P. Wright, M. M. Grady, M. Perreau, M. Maurette, C. T. Pillinger
  1221

Spectral/Image Data Cubes of Europa, Ganymede, and Callisto
J. C. Granahan, K. S. Polk, F. P. Fanale, T. B. McCord
  1222

Ground Penetrating Radar Deployment in Argentine Loess: Implications for the Character of the Martian Stealth Region
J. A. Grant, P. H. Schultz
  1223

The Degradation History of the Roter Kamm Impact Crater, Namibia
J. A. Grant, C. Koeberl, W. U. Reimold, P. H. Schultz, D. Brandt, A. J. Franzsen
  1224

Determination of the Conductivity and Permittivity of the Surface Material and Monitoring of the Outgassing Activity of the Cometary Nucleus
R. Grard, H. Laakso, M. Hamelin, B. Goldstein, D. Winterhalter, H. Kochan, S. Ulamec
  1225

Numerical Experiments of Convective Heat Transfer in a Fluid with Strongly Temperature Dependent Viscosity: Implications for Thermal Planetary Evolution
O. Grasset, E. M. Parmentier
  1226

The Liquidus of H2O-NH3 up to 1.5 GPa: Implications for the Presence of a Liquid Shell in Titan's Interior
O. Grasset, C. Sotin
  1227

Galileo SSI Observation Plans for Callisto and Europa
R. Greeley, K. Bender, R. Sullivan, R. Pappalardo, K. Homan
  1228

Na-Al Chondrules: Analyses, Experiments, and Formation Constraints
J. P. Greenwood, P. C. Hess, J. Devine
  1229

Venusian Lava Flow Morphologies: Variations on a Basaltic Theme
T. K. P. Gregg, S. E. H. Sakimoto
  1230

Chromium-bearing Phases in Orgueil (CI): Discovery of Magnesiochromite (MgCr2O4), Ureyite (NaCrSi2O6), and ChromiumOxide (Cr2O3)
A. Greshake, A. Bischoff
  1231

Pure CaO, MgO (Periclase), TiO2 (Rutile), and Al2O3 (Corundum) in Ca,Al-rich Inclusions from Carbonaceous Chondrites
A. Greshake, A. Bischoff, A. Putnis
  1232

Giant Radiating Dike Swarms: Constraining the Formation and Evolution of the Surface of Venus
E. B. Grosfils, J. W. Head
  1233

The Redistribution of Sodium in Semarkona Chondrules by Secondary Processes
J. N. Grossman
  1234

Education and Outreach Components of the Lunar Prospector Discovery Mission
J. E. Gruener, G. D. French, K. M. Connell
  1235

Specular Scattering from Rock Surfaces at the Viking Lander Sites
E. A. Guinness, R. E. Arvidson, M. K. Shepard
  1236

The Group of Macha Craters in Western Yakutia
E. P. Gurov
  1237

Dispersion of Projectile and Target Debris Upon Penetration of Thin Targets
D. Gwynn, R. P. Bernhard, T. H. See, F. Horz
  1238

The Origin of Group IIF Iron Meteorites-Clues from Metallographic Cooling Rates
H. Haack, K. L. Rasmussen
  1239

Resonance Trapping due to Nebula Disk Torques
J. M. Hahn, W. R. Ward
  1240

Determining the Composition of Mars: Vibrational Spectroscopy of the Zagami Meteorite
V. E. Hamilton, P. R. Christensen
  1241

Global Characteristics of 'Arachnoids' on Venus
V. E. Hamilton, E. R. Stofan
  1242

High C and H Contents of Chondrules
P. Hanon, M. Chaussidon, F. Robert
  1243

Chondrule Alteration in the CM Carbonaceous Chondrite, LEW 90500
N. P. Hanowski, A. J. Brearley
  1244

Structural Analysis and Geodynamic Implications of Tessera Terrain, Venus
V. L. Hansen, J. J. Willis
  1245

The Nature of the Opposition Effect in Frost, Vegetation and Soils
B. Hapke, D. Dimucci, R. Nelson, W. Smythe
  1246

The Rotation Rates of Very Small Asteroids: Evidence for 'Rubble Pile' Structure
A. W. Harris
  1247

Scattering of Light by Individual Particles and the Implications for Models of Planetary Surfaces
B. N. Hartman, D. Domingue, A. Verbiscer
  1248

Shergottite QUE 94201: Texture, Mineral Compositions, and Comparison with Other Basaltic Shergottites
R. P. Harvey, T. J. McCoy, L. A. Leshin
  1249

Maximum CO2 Amount on Venus: Present and Past
G. L. Hashimoto, Y. Abe, S. Sasaki
  1250

Could Imbrium Ejecta be the Source of the High-Th Material in the Van de Graaff Region of the Moon?
L. A. Haskin, W. B. McKinnon, L. A. M. Benner
  1251

Modeling of Sedimentary Bedforms Produced by Impact-induced Tsunami in the ~2.6 GA Hamersley Basin, Western Australia
S. W. Hassler, H. F. Robey, D. Davies, B. Simonson
  1252

The High Resolution Stereo Camera (HRSC) for Mars 96: Results of Outdoor Tests
E. Hauber, J. Oberst, J. Flohrer, I. Sebastian, W. Zhang, C. A. Robinson, R. Jaumann, G. Neukum
  1253

Remote Sensing Studies of Lunar Crater Rays
B. R. Hawke, D. T. Blewett, J. F. Bell III, P. G. Lucey, B. A. Campbell, M. S. Robinson
  1254

The Use of Pattern Theory in Spectral Analysis of Surface Units
G. He, C. M. Pieters, J. F. Mustard
  1255

Sequence of Tectonic Deformation in the History of Venus: Evidence from Global Stratigraphic Relations
J. W. Head, A. T. Basilevsky
  1256

Formation of Tertiary Crust on Venus by Remelting of Tessera Crustal Roots: The Ovda Regio Festoon
J. W. Head, P. C. Hess
  1257

Evidence for Regional Basin Formation in Early Post-Tessera Venus History: Geology of the Lavinia Planitia Area (V55)
J. W. Head, M. A. Ivanov
  1258

Tessera Terrain Formation and Evolution on Venus: Evidence for Phase III Epeirogenic Uplift in Ovda Regio
J. W. Head, M. A. Ivanov
  1259

Lunar Linear Rilles as Surface Manifestations of Dikes: Predictions and Observations
J. W. Head, L. Wilson
  1260

Ganymede: Nature of Dark Terrain and Processes of Formation and Evolution
J. W. Head, R. T. Pappalardo, Galileo Solid State Imaging Team
  1261

Basins in Tesserae and Plains on Venus: Assessment of Origin Through Processes of Crustal and Depleted Mantle Layer Loss
J. W. Head III, E. M. Parmentier
  1262

Evolution of volcanic styles on Venus: Change but not Noachian&quest
J. W. Head III, A. T. Basilevsky, L. Wilson, P. C. Hess
  1263

Integrated Geophysical Modelling of the Vredefort Impact Structure, Witwatersrand Basin, South Africa
H. Henkel, W. U. Reimold
  1264

The North Polar Layered Terrain on Mars: A Very Young Surface
K. E. Herkenhoff, S. A. Nowicki, J. J. Plaut
  1265

Volatility, Chondrules, and the Composition of the Earth
C. T. Herzberg, R. H. Hewins
  1266

The Role of Water in the Eclogite Phase Transition and Crustal Recycling on Venus
S. G. Herzog, P. C. Hess
  1267

Reflectance Spectra of Five-Component Mineral Mixtures: Implications for Mixture Modeling
S. G. Herzog, J. F. Mustard
  1268

Evaporative Loss and Degree of Melting in Semarkona Type I Chondrules
R. H. Hewins, B. Zanda, M. Bourot-Denise
  1269

Chemistry of Fullerenes on the Earth and in the Solar System: A 1995 Review
D. Heymann
  1270

Fullerenes Were Not Found in Lunar Samples 10084 and 79261
D. Heymann
  1271

Solubility of Fullerenes C60 and C70 in Water
D. Heymann
  1272

Mare Australe: New Results from Lunar Orbiter and Clementine UV/VIS Imagery
H. Hiesinger, R. Jaumann, G. Neukum, J. W. Head III
  1273

Observations of Mare Humboldtianum: Topography, Ages and Multispectral Characteristics
H. Hiesinger, J. Oberst, R. Jaumann, G. Neukum, J. W. Head III
  1274

PRIME Lab Radiocarbon Measurements
D. J. Hillegonds, K. A. Mueller, X. Ma, M. E. Lipschutz
  1275

Reflectance Spectra (UV-3 micrometers) of Heated Ivuna (CI) Meteorite and Newly Identified Thermally Metamorphosed CM Chondrites
T. Hiroi, C. M. Pieters, M. E. Zolensky, M. Prinz
  1276

Pressure-Volume-Temperature and Phase Relationships of Sulfur Dioxide
D. L. Hogenboom, J. S. Kargel, M. L. Reiter
  1277

The Boltysh Impact Structure, Ukraine: Geochemistry of the Melt Sheet
Th. Holker, A. Deutsch
  1278

Partial Melting of the Martian Mantle: Effect on Redox State and Magmatic Carbon
J. R. Holloway
  1279

Accretion and Early History of the Earth: Constraints Imposed by NI and CO Abundances in the Earth's Mantle
A. Holzheid, H. Palme
  1280

Origin of Circumstellar SiC Grains With Low 12C/13C Ratios: A Multiple Star Scenario
P. Hoppe, T. A. Kocher, R. Strebel, P. Eberhardt, S. Amari, R. S. Lewis
  1281

Non-Linear Dispersion of Spiral Density Waves in Saturn's Rings
L. J. Horn, N. J. Rappaport
  1282

Analytical Models of Lava Flows at Ulgen, Amaterasu, and Loki Patera
R. R. Howell, C. Moustakas
  1283

Pomozdino and Peramiho: Are They Anomalous Eucrites?
W. Hsu, G. Crozaz
  1284

The Shadow of Titan on Mimas and Saturn's Rings
W. B. Hubbard, G. J. Consolmagno, R. P. Boyle, R. Hill
  1285

The Shape and Directional Distribution of Ejecta Lobes of 10 Impact Craters on Venus
S. J. Huotari, K. Kauhanen
  1286

Sources of SiC Grains with Low 12C/13C and High 15N/14N and 26Al/27Al
G. R. Huss, G. J. Wasserburg
  1287

Magnesium and Silicon Isotopes in Layered Chondrules from EL Djouf (CR2)
G. R. Huss, M. K. Weisberg, G. J. Wasserburg
  1288

Radiogenic 53Cr* in Orgueil Carbonates: Chronology of Aqueous Activity on the CI Parent Body
I. D. Hutcheon, D. L. Phinney
  1289

Hot Accretion of the Ordinary Chondrites: The Rocks Don't Lie
R. Hutchison
  1290

REE Abundances in Matrix of Allende (CV) Chondrite
M. Inoue, N. Nakamura, M. Kimura
  1291

New Approaches to the In-Situ Study of Martian Surface Mineralogy
E. J. Israel, R. E. Arvidson, A. Wang, B. L. Jolliff
  1292

The Kaidun Meteorite: Melt Deposits on the Surface of Some Particles
A. V. Ivanov, F. Brandstatter, M. E. Zolensky, N. N. Kononkova
  1293

Bingham Parameters for Fluidized Ejecta Spreading on Mars and Martian Volatiles
B. A. Ivanov, A. V. Pogoretsky
  1294

Puchezh-Katunki Impact Crater: Preliminary Data on Recovered Core Block Structure
B. A. Ivanov, G. G. Kocharyan, V. N. Kostuchenko, A. F. Kirjakov, L. A. Pevzner
  1295

Tessera Terrain in Ovda Regio, Venus: Preliminary Results of a Geologic Mapping Traverse
M. A. Ivanov, J. W. Head
  1296

Thermoluminescence Measurements in Experimentally Shock-loaded Quartz
A. I. Ivliev, D. D. Badjukov, L. L. Kashkarov
  1297

Dar AL Gani 013--A New Saharan Rumuruti-Chondrite (R3-6) with Highly Unequilibrated (Type 3) Fragments
A. Jackel, A. Bischoff, R. N. Clayton, T. K. Mayeda
  1298

Nd Isotopic Systematics of Chassigny
E. Jagoutz
  1299

Microscopic Images of Surface and Subsurface Parts of Planets Using TV Microscope Mikrotel
P. Jakes, J. Bocek, R. Rieder, H. Wanke
  1300

Loss of Martian Volatiles to Space and Evolution of Climate: A Consistency Check
B. M. Jakosky
  1301

Siderophile Elements in Lunar Impact Melts Define Nature of the Impactors
O. B. James
  1302

Gravity Signatures of Corona Precursors on Venus: Reality vs. Prediction
D. M. Janes, E. P. Turtle
  1303

Variations in Lithospheric Properties on Venus from Coronae and Chasmata
C. L. Johnson, S. C. Solomon
  1304

An Explanation for the Observed Spectral Contrast Reduction Between Field and Laboratory Infrared Measurements of Soils
J. R. Johnson, P. G. Lucey, K. A. Horton, T. Williams, E. M. Winter, A. D. Stocker
  1305

Geochemical Effects of Recrystallization and Exsolution of Plagioclase of Ferroan Anorthosite
B. L. Jolliff, W. Hsu
  1306

Structural Comparison of Lunar, Terrestrial, and Synthetic Whitlockite Using Laser Raman Microprobe Spectroscopy
B. L. Jolliff, J. J. Freeman, B. Wopenka
  1307

QUE94281: Shallow Plutonic VLT Components and Highlands Components
B. L. Jolliff, K. M. Rockow, R. L. Korotev
  1308

Partitioning of Xe Among Phases Relevant to the Upper Mantles of the Earth and Mars
J. H. Jones, D. Walker
  1309

Trace Element Partitioning in Porphyritic, Pyroxene-rich Chondrules in Semarkona
R. H. Jones, G. D. Layne
  1310

A Huge Fossil Linear Zone of Weakness in the Area of the Ancient Martian Uplands?
H.-P. Jons
  1311

Progressive Chaotic Terrains in Volcanic Areas on Mars: Up to What Dimensions Can Such Features Grow?
H.-P. Jons
  1312

Systematic Analyses of Major Element Distributions in GEMS from High Speed IDPs
D. J. Joswiak, D. E. Brownlee, J. P. Bradley, D. J. Schlutter, R. O. Pepin
  1313

Evidence for Recent Gardening or Disturbance in Lunar Core 76001 from Solar-Cosmic-Ray Records of 14C
A. J. T. Jull, S. Cloudt
  1314

Radar Imaging and Topography of Tharsis, Olympus Mons, and Albor Tholis
R. F. Jurgens, M. A. Slade, A. F. C. Haldemann
  1315

The Carbon Measurements in the Upper Mantle Minerals by the 12C(d,n)13N Nuclear Reaction
A. A. Kadik, S. N. Shilobreeva, V. M. Minaev, V. I. Kovalenko
  1316

Analysis of Chemical Zoning in Isolated and Chondrule Olivines in the Yamato 791717 CO3 Carbonaceous Chondrite: Fractional Crystallization or Atomic Diffusion?
H. Kaiden, T. Mikouchi, K. Nomura, M. Miyamoto
  1317

The Classificational Wanderings of the Ningqiang Chondrite
G. W. Kallemeyn
  1318

Chromium Isotopic Compositions of Some Chondrites
N. Kano, M. Imamura
  1319

Behavior of Chromium in Chondritic Materials
N. Kano, H. Matsuzaki, K. Nogami, M. Imamura
  1320

Mars ISRU Sample Return (MISR)--A Mission Description
D. I. Kaplan
  1321

Magnetic Fields and the Detectability of Brine Oceans in Jupiter's Icy Satellites
J. S. Kargel, G. J. Consolmagno
  1322

Systematic Collection and Analysis of Meteoritic Materials from Meteor Crater, Arizona
J. S. Kargel, P. Coffin, M. Kraft, J. S. Lewis, C. Moore, D. Roddy, E. M. Shoemaker, J. H. Wittke
  1323

A First Result of Isothermal Annealing of an Fe-SiO Smoke
J. M. Karner, F. J. M. Rietmeijer
  1324

Preliminary Electron Microbeam Analyses of Lightning Induced Evaporation and Gas Phase Mixing
J. M. Karner, P. J. Wasilewski, F. J. M. Rietmeijer, J. A. Nuth
  1325

Thermal Alteration Effects of the Large Olivine Grains of the Zagami Meteorite
L. L. Kashkarov, L. M. Bulgakova, S. S. Assonov, G. V. Kalinina, Yu. A. Shukolyukov
  1326

Radiation-Thermal Effects in the Lunar Meteorites EET87521 and MAC88105 by the Track and Thermoluminescence Data in the Olivine Crystals
L. L. Kashkarov, A. I. Ivliev, G. V. Kalinina
  1327

The Effect of Ultraviolet Radiation on Planetary Habitability
J. F. Kasting, D. C. B. Whittet, W. R. Sheldon
  1328

22Ne-E(L) Measured in Individual KFC1 Graphite Grains from the Murchison Meteorite
K. Kehm, S. Amari, C. M. Hohenberg, R. S. Lewis
  1329

Carbon Petrography and the Chemical State of Carbon and Nitrogen in IDPs
L. P. Keller, K. L. Thomas, D. S. McKay
  1330

An Electron Microscope and Microspectrophotometry Study of Patina on Apollo 17 Breccia 76015
L. P. Keller, S. J. Wentworth, D. S. McKay
  1331

Olivine as an Indicator of Convection in the Solar Nebula
C. E. Kenknight
  1332

Uncompensated Mare Basalts as a Model for Lunar Mascons
W. S. Kiefer, M. C. Dodge
  1333

Geochemical and Sedimentary Records Across Precambrian/Cambrian Boundary, Elburz Mountains, North Iran: Implications for a Breakup of Ocean Stratification Before the Cambrian Explosion
H. Kimura, R. Matsumoto, Y. Kakuwa, B. Hamdi
  1334

Influence of Particle Grain Size Distribution on Theoretical Reflectance Calculations
T. V. V. King, W. M. Calvin, R. N. Clark
  1335

Analysis of Gravity and Topographic/Bathymetric Data Over the Chicxulub Impact Structure: A Look at Details
G. L. Kinsland, M. Hurtado, A. Ceron, K. Pope, A. Ocampo, W. Smythe, P. Bedard
  1336

Systematics of Alkali and PB Abundances in Meteoritic and Lunar Samples
N. T. Kita
  1337

The New Planetary Simulation Facility of DLR--Construction, Operation, Application
H. Kochan, W. Feibig, M. Kretschmer, R. Willnecker, M. V. Gerasimov, B. Speth, U. Kohler, S. Weckesser
  1338

Mechanics of Rock Massive Disruption: Implementation to Planetary Cratering Processes
G. G. Kocharyan, V. N. Kostuchenko, B. A. Ivanov
  1339

Petrological and Geochemical Studies of Samples from the Nicor Chestnut 18-4 Drill Core, AMES Impact Structure, Oklahoma
C. Koeberl, W. U. Reimold
  1340

Petrology and Geochemistry of Target Rocks, Breccias, and Impact Melt Rocks from the Ilyinets Crater, Ukraine
C. Koeberl, W. U. Reimold, E. P. Gurov
  1341

Oligarchic Growth of Protoplanets
E. Kokubo, S. Ida
  1342

Cataclysmic Flood Spillways: Comparison of Mars and Earth Examples
G. Komatsu, V. R. Baker
  1343

Comparative Study of Submarine Volcanoes and Small Venusian Volcanic Edifices
G. Komatsu, M. C. Krempasky
  1344

The Composition of the Prebasin Crust in the Central Highlands of the Moon
R. L. Korotev
  1345

VH-Nuclei Cosmic-Ray Tracks in Silicate Mineral Crystals of Erevan Howardite: Galactic and Pre-accretion Sources of Irradiation
N. N. Korotkova, L. L. Kashkarov, A. Ya. Skripnik
  1346

The Comparison of Shock Effects in Naturally and Experimentally Deformed Clinopyroxene
S. Kotelnikow, V. Feldman, A. Juk
  1347

Tochilinite Produced in Laboratory
S. V. Kozerenko, N. J. Organova, V. V. Fadeev, L. O. Magazina, N. N. Kolpakova, L. A. Kopneva
  1348

Venus Cratering Record: Constraints on Resurfacing History
M. Kreslavsky
  1349

Topography of Small Coronae on Venus: Preliminary Overview
M. Kreslavsky, R. Vdovichenko
  1350

Sm-Nd System in Single Chondrules from Tieschitz (H3)
N. Krestina, E. Jagoutz, G. Kurat
  1351

CASSE--Acoustic Investigation of a Cometary Surface
M. Kretschmer, U. Konopka, H. Kochan, D. Mohlmann
  1352

QUE94201, a New Martian Meteorite that May Represent a Bulk Melt Rather than a Cumulate Fraction
D. A. Kring, J. D. Gleason, D. H. Hill, A. J. T. Jull, W. V. Boynton
  1353

A Glass-Rich View of QUE94281, A New Meteoritic Sample from a Mare Region of the Moon
D. A. Kring, D. H. Hill, W. V. Boynton
  1354

Magnetic Properties of the Recently Fallen Baszkowka Chondrite
E. Krol, B. Lang
  1355

Origin of Fayalitic Olivine Rims and Plate-like Matrix Olivines in the CV3 Chondrite Allende
A. N. Krot, E. R. D. Scott, M. E. Zolensky
  1356

Problems of Venus Stratigraphy Revealed in the Process of 1:10 M Photogeologic Mapping of the Area Between Ananketessera and Lakshmi Planum, Venus
V. P. Kryuchkov
  1357

The Chondrule Size Distribution of Bjurbole
K. E. Kuebler, H. Y. McSween Jr.
  1358

A Piece of the KT Bolide?
F. T. Kyte
  1359

The Distribution of Subsurface Water at Hadriaca and Tyrrhena Paterae and Surrounding Areas on Mars from Impact Crater Morphology
M. G. Lancaster, J. E. Guest
  1360

Tectonic Deformation of Sinuous Rilles and Canali on Venus
J. C. Langdon, G. Komatsu, V. R. Baker
  1361

Volcanological Setting of a Sinuous Rille Cluster on Venus
J. C. Langdon, G. Komatsu, V. R. Baker
  1362

The Azuara and Rubielos Structures, Spain: Twin Impact Craters or Alpine Thrust Systems? TEM Investigations on Deformed Quartz Disprove Shock Origin
F. Langenhorst, A. Deutsch
  1363

Microstructural Characteristics of Shocked Quartz from Ejecta of the Submarine Mjolnir Impact Structure, Barents Sea
F. Langenhorst, H. Dypvik
  1364

Laser Shock Experiments on Rock-Forming Silicates: A TEM Examination
F. Langenhorst, M. Boustie, U. Scharer, D. Stoffler
  1365

Troilite Cosmothermometer: Application to L-Chondrites
H. V. Lauer Jr., J. L. Gooding
  1366

Experimental Partitioning Studies on SC in Olivine and Pyroxene
H. V. Lauer Jr., J. H. Jones, D. J. Lindstrom
  1367

The Relicts of Stellar Nucleosynthesis in Chondrites
A. K. Lavrukhina
  1368

Elemental Composition of Mineral Constituents from Pillistfer EL6 Chondrite
Z. A. Lawrentjeva
  1369

Karikkoselka--A New Impact Structure in Finland
M. Lehtinen, L. J. Pesonen, R. Puranen, A. Deutsch
  1370

Venus: Its Great Transition
A. Lenardic, W. M. Kaula
  1371

Lava and Ice Interaction on Mars: Application of Terrestrial Observations and Laboratory Simulations
D. T. Lescinsky, J. H. Fink
  1372

Oxygen Isotopic Compositions of Olivine and Pyroxene from CI Chondrites
L. A. Leshin, A. E. Rubin, K. D. McKeegan
  1373

A Collector to Retrieve Micrometeorites from the South Pole Water Well
J. H. Lever, S. Taylor, R. Harvey
  1374

Pressure Effect on Partitioning of Ni, Co, S: Implications for Mantle-Core Formation
J. Li, C. B. Agee
  1375

Mixing Across a Simple Mare-Highland Contact in the Grimaldi Basin: New Insights from Clementine UV/VIS Data
L. Li, J. F. Mustard, G. He
  1376

A New Kind of Plagioclase-Rich Inclusions in the Ningqiang Carbonaceous Chondrite
Y. T. Lin, M. Kimura
  1377

Discovery of Complex Titanium Oxide Associations in a Plagioclase-Olivine Inclusion (POI) in the Ningqiang Carbonaceous Chondrite
Y. T. Lin, M. Kimura
  1378

Trace Element Analysis of Carbonaceous Chondrite Clasts in Howardites
D. J. Lindstrom, R. R. Martinez, M. E. Zolensky
  1379

Exploring the Solar System Teacher Workshop: Lessons Learned and Teacher Plans
M. M. Lindstrom, J. S. Allen, C. C. Allen, G. Eskridge, K. Tobola, K. Stocco
  1380

QUE94281, A Glassy Basalt-rich Lunar Meteorite Similar to Y-793274
M. M. Lindstrom, D. W. Mittlefehldt, R. V. Morris, R. R. Martinez
  1381

Cometary Sources of Low-Entry-Heating CPA IDPs
J. C. Liou, H. A. Zook
  1382

Thermal Recycling of Chondrules: I. Experimental Study of Remelting on Texture
G. E. Lofgren, L. Le
  1383

Investigation of the Origin of Hi-Ti Basalts by Polybaric Fractional Fusion
J. Longhi
  1384

Phase Equilibrium Constraints on Angrite Petrogenesis
J. Longhi
  1385

Analysis of Martian Lava Flow Properties Using Three Complementary Models
R. Lopes-Gautier, B. Bruno, G. J. Taylor, W. Smythe, C. Kilburn
  1386

Characterization of a Planet: Dependence on Coverage Fraction
R. D. Lorenz
  1387

Parabolic Ejecta Features on Titan? Probably Not
R. D. Lorenz, H. J. Melosh
  1388

Catastrophic Impacts in the Gravity Regime
S. G. Love, T. J. Ahrens
  1389

Young Volcanism or Extensive Mass-Wasting Collapse Inside West Candor Chasma, Mars
B. K. Lucchitta
  1390

Lunar Titanium Content from UV-VIS Measurements
P. G. Lucey, D. T. Blewett, J. L. Johnson, G. J. Taylor, B. R. Hawke
  1391

Iron and Titanium Concentrations in South Pole-Aitken Basin: Implications for Lunar Mantle Composition and Basin Formation
P. G. Lucey, G. J. Taylor, B. R. Hawke, P. D. Spudis
  1392

Radial Heterogeneity of 53-Mn in the Early Solar System and the Place of Origin of Ordinary Chondrites
G. W. Lugmair, A. Shukolyukov, Ch. MacIsaac
  1393

Chicxulub Impact-Induced Vaporization: S and C Species and Their Affect on Global Climate
J. R. Lyons, T. J. Ahrens
  1394

Mars Crustal Thickness Models from Mars50c and GMM-1
S. N. Lyons, H. V. Frey, B. G. Bills, J. H. Roark
  1395

On the Existence of Debris Clouds in the Space Station Orbit
C. R. Maag, S. P. Deshpande, T. J. Stevenson
  1396

High-Temperature Deformation of Dry Diabase, with Application to Crustal Deformation on Venus
S. J. Mackwell, M. Bystricky, J. C. White, M. E. Zimmerman, D. L. Kohlstedt
  1397

Vesicles in Remelted Chondrules
S. V. Maharaj, A. de La Cruz, R. H. Hewins
  1398

Medium Resolution Global Lunar Mosaics of FeO, TiO2 and Is/FeO
E. Malaret, P. G. Lucey
  1399

Geometry of Stable Capture Zones for Planet Earth and Implications for Estimating the Probability of Stable Gravitational Capture of Planetoids from Heliocentric Orbit
R. J. Malcuit, R. R. Winters
  1400

The Fate of Neptune Planetesimals
R. Malhotra
  1401

Mineralogical Analysis of Desert Varnish by DTA/GC: Applicability to the Exobiology of Mars
R. L. Mancinelli, M. R. White
  1402

Lunar Dielectric Constants from Radio Thermal Emission Measurements
J. L. Margot, D. B. Campbell, B. A. Campbell, B. J. Butler
  1403

A Concept of the Long-Term Atmospheric Study of Mars
M. Ya. Marov, G. D. Walberg
  1404

A Strategy for In Situ Analysis of the Martian Surface
J. R. Marshall
  1405

Aggregation in Particulate Clouds in Astrophysical and Planetary Settings: Preliminary Results from USML-2
J. R. Marshall, F. Freund
  1406

Behavior of Windblown Sand on Mars: Results From Single-Particle Experiments
J. R. Marshall, J. Borucki, C. Sagan
  1407

In Situ Mineral Identification for Mars: Results From a Miniature X-ray Diffractometer Deployed on the Marsokhod Rover
J. R. Marshall, C. Bratton, R. Keaten, C. Seward, L. Koppel
  1408

Martian Surface Mineralogy from 0.8-1.05 Micrometer TIGER Spectro-Imagery Measurements: Evidence for Compositional Heterogeneities in Terra Sirenum/Tharsis Montes Formation
P. Martin, P. Pinet, R. Bacon, A. Rousset, F. Bellagh
  1409

Nitrogen Isotopic Composition of the Silicate Earth and its Bearing on Earth-Atmosphere Evolution
B. Marty, L. Zimmermann, F. Humbert
  1410

Preliminary Observations on Drusy Vugs in the Albion Iron Meteorite
U. B. Marvin, M. I. Petaev, R. Kempton
  1411

Rosetta Mission: Orbital Motion Around a Cometary Nucleus
F. Marzari, L. Tomasella, V. Vanzani
  1412

The Suavjarvi Structure: an Early Proterozoic Impact Site on the Fennoscandian Shield
M. S. Mashchak, M. V. Naumov
  1413

Evidence for Shock Metamorphic Origin of Multiply-Striated Joint Surfaces (MSJS) in Sandstones of the Sinamwenda Meteorite Impact Structure, Zimbabwe
S. Master, W. U. Reimold, D. Brandt
  1414

Distribution of Xe Components in the IAB Iron EL Taco: Chronological Implications
K. J. Mathew, K. Marti, J. Zipfel
  1415

A Qualitative Model of Meteor Storms
M. J. Matney
  1416

Galileo's Upcoming View of Io--A Set of Predictions
D. L. Matson, T. V. Johnson, D. L. Blaney, G. J. Veeder
  1417

Terrestrial Landscape Response to Climatic Cycling and Martian Paradigms
T. A. Maxwell
  1418

Lunar Crustal Stratigraphy
I. S. McCallum, H. E. O'Brien
  1419

The Crystallization of the Zagami Shergottite: A 1 Atm. Experimental Study
T. J. McCoy, G. E. Lofgren
  1420

A Precise Lunar Photometric Function
A. S. McEwen
  1421

Temperatures on Io: Implications to Geophysics, Volcanology, and Volatile Transport
A. S. McEwen, N. R. Isbell, K. E. Edwards, J. C. Pearl
  1422

Implications of Stress Modeling for Volcanic Structure and Magmatic Flux on Venus
P. J. McGovern, S. C. Solomon
  1423

Crossing Fractures and the Strength of Venus Crustal Rocks
J. C. McGuire, D. M. Davis, G. J. Consolmagno
  1424

SIR-C/X-SAR Radar Studies; Impact and Aeolian Features, Borkou Region Northern Chad
J. F. McHone, R. Greeley, D. Blumberg
  1425

Complex Zoned Pyroxenes in Shergottite QUE 94201: Evidence for a Two-Stage Crystallization History
G. McKay, S.-R. Yang, J. Wagstaff
  1426

QUE94201, A Noncumulate Shergottite?
H. Y. McSween Jr., D. D. Eisenhour
  1427

An Ion Microprobe Study of Fractionated Sulfur Isotopes in Hydrothermal Sulfides of the Kaidun Meteorite Breccia
H. Y. McSween Jr., L. R. Riciputi, B. A. Paterson
  1428

Iron Meteorites: Profiles of Ge, Ga, and CU Using Micro-PIXE
A. Meibom, C. Yang, M. Elfman, K. L. Rasmussen
  1429

Limits on the CO2 Content of the Martian Polar Deposits
M. T. Mellon
  1430

The Abundance of Fine-Grained Impact Ejecta on Venus
H. J. Melosh, C. J. Schaller
  1431

The Abundance of Doublet Craters on Mars
H. J. Melosh, J. Ingram, W. F. Bottke
  1432

Kinetics and Mechanisms of Volatilization of SiC and SiO2 in the Solar Nebula
R. A. Mendybaev, J. R. Beckett, L. Grossman, E. Stolper
  1433

Deuterium Enrichments in Cluster IDPs
S. Messenger, R. M. Walker, S. J. Clemett, R. N. Zare
  1434

Relationships Between Wrinkle Ridges and Craters in Hesperia Planum: Constraints on the Timing of Ridge Formation
S. C. Mest, D. A. Crown
  1435

Geomorphic Tests of the Geyser and Dust Devil Models for Triton's Plumes
S. M. Metzger
  1436

Terrestrial Dust Devils; Implications for the Surface of Mars
S. M. Metzger, N. Lancaster
  1437

On the Nucleosynthesis of 48Ca and 50Ti
B. S. Meyer, L.-S. The, M. F. El Eid
  1438

Lava, Debris, and Pyroclastic Flow Deposits: Analysis and Identification Using Curvature Spectra
G. Michaels, R. Greeley
  1439

Mineralogy and Petrology of New Antarctic Shergottite QUE94201: A Coarse-Grained Basalt With Unusual Pyroxene Zoning
T. Mikouchi, M. Miyamoto, G. A. McKay
  1440

Metal-Sulfide Melt Non-Interconnectivity in Silicates, Even at High Pressure, High Temperature, and High Melt Fractions
W. G. Minarik, F. J. Ryerson
  1441

Mineralogical and Thermal Properties of Jarositic Tephra on Mauna Kea, Hawaii: Implications for the Sulfur Mineralogy on Mars
D. W. Ming, D. C. Golden, J. L. Gooding, R. V. Morris, D. R. Thompson, J. F. Bell III
  1442

The Mars-96 PGS Germanium Gamma-Ray Spectrometer
I. G. Mitrofanov, D. S. Anfimov, A. M. Chernenko, V. Sh. Dolidze, V. I. Kostenko, O. E. Isupov, A. S. Pozanenko, A. K. Ton'shev, D. A. Ushakov, Yu. I. Bobrovnitsky, T. M. Tomilina, G. F. Auchampaugh, M. M. Cafferty, D. M. Drake, E. E. Fenimore, R. W. Klebesadel, J. L. Longmire, C. E. Moss, R. C. Reedy, J. E. Valencia
  1443

Martian Meteorites QUE 94201, an Unusual Basalt, and Governador Valadares, A Typical Clinopyroxenite: Geochemistry
D. W. Mittlefehldt, M. M. Lindstrom
  1444

Eruption Rates of Venusian Crater Outflows
H. Miyamoto, S. Sasaki
  1445

Reproducing Actual Morphology of Planetary Lava Flows
H. Miyamoto, S. Sasaki
  1446

The Cooling Rate of the Sioux County Eucrite
M. Miyamoto, P. H. Warren, H. Takeda
  1447

Iron Content of the Martian Mantle: The Potential of Seismological Investigations
A. Mocquet, P. Vacher, C. Sotin
  1448

Cosmogenic Radionuclide Contents of Antarctic Meteorites from Allan Hills Having High Natural Thermoluminescence
J. Mokos, S. Vogt, M. E. Lipschutz
  1449

The Abundance of Large, Copernican-Age Craters on the Moon
J. M. Moore, A. S. McEwen
  1450

Mass Wasting and Ground Collapse in Terrains of Volatile-Rich Deposits as a Solar System-Wide Geological Process: The Pre-Galileo View
J. M. Moore, M. T. Mellon, A. P. Zent
  1451

A Multipurpose Penetrator Probe for Heat-flow, Thermal Properties, and Climatic-cycle Studies on Mars
P. Morgan, S. E. Smrekar, T. C. Clarke
  1452

Additional Demonstration of Alkali and REE Fractionations of Acapulcoites; New Results for ALHA81187, ALHA81261 and ETT84302
N. Morikawa, N. Nakamura
  1453

Tracer Diffusion of 60Co, 46Sc, 153Gd and 170Tm in Melilite
M. Morioka, H. Nagasawa
  1454

Reflectivity Spectra of Sulfate Alteration Products of Volcanic Tephra from the Summit of Mauna Kea Volcano: Implication for Martian Sulfate Mineralogy
R. V. Morris, D. C. Golden, D. W. Ming, D. R. Thompson
  1455

Sedimentary Evolution of the Hydroates Chaos, Mars
C. Mosangini, G. G. Ori
  1456

The Long Lava Flows of Elysium Planitia, Mars
P. J. Mouginis-Mark
  1457

Training Graduate Students for Future Mars Missions
P. J. Mouginis-Mark
  1458

Another Estimate for the Percentage of Partly Embayed Craters in Equilibrium Resurfacing
P. J. Muinonen
  1459

Visible-NIR Spectroscopic Evidence for the Composition of Low-Albedo Altered Soils on Mars
S. Murchie, E. Merenyi, R. Singer, L. Kirkland
  1460

The Imaging and NIR Spectroscopy Experiments on the NEAR Spacecraft
S. Murchie, K. Peacock, J. Bell, M. Robinson, J. Veverka, A. Harch, A. Cheng, S. E. Hawkins III, J. Warren, R. Gold, H. Darlington, M. Elko, D. Prendergast, C. Chapman, L. McFadden, M. Malin, P. Thomas, P. Helfenstein
  1461

Cosmogenic Records in Efremovka CV3 Meteorite
S. V. S. Murty, K. Nishiizumi, J. N. Goswami
  1462

Mafic Mineralogy of Martian Volcanics: Variations in Space and Time
J. F. Mustard, J. M. Sunshine
  1463

Evaporation Induced Isothermal Crystallization of Silicate Melt
H. Nagahara
  1464

Noble-Gas Distribution in the Murchison, Murray, Nogoya and Yamato-791198 CM Chondrites
T. Nakamura, K. Metzler, K. Nagao, N. Takaoka
  1465

Metamorphic Temperature Estimation for Equilibrated Ordinary Chondrites by a Plagioclase Thermometer
Y. Nakamuta, Y. Motomura
  1466

Potassium Budget and Fractional Degree of Mantle Melting on Venus from Venera and VEGA Gamma-ray Measurements
N. Namiki, S. C. Solomon
  1467

Impact-generated Hydrothermal Activity: The Record in Terrestrial Craters
M. V. Naumov
  1468

Lunar Optical Types as Revealed by Galileo
A. N. Naydyonov, Yu. G. Shkuratov, D. G. Stankevich
  1469

Phosphides and P-rich Sulfides in the Mighei (CM) Chondrite
M. A. Nazarov, F. Brandstaetter, G. Kurat
  1470

Dust Torus Development Around Mars
R. Nazzario, T. W. Hyde
  1471

A New Brachinite and Petrogenesis of the Group
C. E. Nehru, M. Prinz, M. K. Weisberg, M. E. Ebihara, R. N. Clayton, T. K. Mayeda
  1472

Geologic Sequence of Formation and Evidence for Sheetwash Erosion at the Ares Vallis Region, Mars
D. M. Nelson, R. Greeley
  1473

Can Coherent Backscattering Principles Form the Basis of a New Remote Sensing Technique for Measuring Particle Size in a Planetary Regolith?
R. M. Nelson, B. W. Hapke, W. D. Smythe, L. J. Horn
  1474

Luminosity of the Bolides Created by SL-9 Comet Fragments in the Jovian Atmosphere
I. V. Nemtchinov, N. A. Artem'eva, B. A. Ivanov, I. B. Kosarev, V. V. Shuvalov, V. V. Svetsov, G. Neukum, G. Hahn, G. Wagner
  1475

Impacts of Large Meteoroids into the Earth's Atmosphere
I. V. Nemtchinov, A. P. Golub', I. B. Kosarev, O. P. Popova, V. V. Shuvalov, V. V. Svetsov
  1476

Coherence Analysis of Lunar Mare Basins
G. A. Neumann, M. T. Zuber
  1477

Impact Events and the Erosion of Planetary Atmospheres: Some Surprising Results from Theory and Simulation
W. I. Newman, E. M. D. Symbalisty, E. M. Jones, T. J. Ahrens
  1478

W/Hf Fractionation in Chondrites and the Earth: Constraints on Timing of Core Formation
H. E. Newsom
  1479

Exposure Histories of Lunar Meteorites Queen Alexandra Range 94281 and 94269
K. Nishiizumi, M. W. Caffee
  1480

Exposure History of Shergottite Queen Alexandra Range 94201
K. Nishiizumi, M. W. Caffee
  1481

Aerogel for IDP Capture: Lessons Learned
K. Nishioka, T. Bunch, M. Fonda, J. T. Ryder, J. Wittenauer
  1482

Oxygen and Aluminum Isotopic Ratios in Presolar Al2O3 from the Tieschitz Meteorite
L. R. Nittler
  1483

Clementine Bi-Static Radar Experiment: Preliminary Results
S. Nozette, C. L. Lichtenberg, P. Spudis, R. Bonner, W. Ort, E. Malaret, M. Robinson, E. Shoemaker
  1484

Crystallization, Recrystallization, and Impact Metamorphic Ages of Monomict Eucrite Y792510
L. E. Nyquist, H. Takeda, D. D. Bogard, C.-Y. Shih, H. Wiesmann
  1485

Lunar Meteorites and the Lunar Crustal SR and Nd Isotopic Compositions
L. E. Nyquist, H. Wiesmann, C.-Y. Shih, J. Dasch
  1486

New Data on Lunar Topography Derived from Galileo and Clementine Stereo Images
J. Oberst, M. Wahlisch, W. Zhang, T. Roatsch, A. C. Cook, R. Jaumann
  1487

The Depth of Formation of Highly Evolved Lunar Rocks
H. E. O'Brien, I. S. McCallum
  1488

Shuttle Imaging Radar (SIR-C) Images Reveal Multiple Impact Craters at Aorounga, Northern Chad
A. C. Ocampo, K. O. Pope
  1489

Martian Evaporite Deposits? A Comparison of Viking 3-Point Spectra
B. W. O'Connell, P. E. Geissler
  1490

Development of X-Ray Spectrometer with a Large-Area GSPC: Application for Small-sized Planetary Missions
T. Okada, S. Tanaka, A. Fujimura, H. Mizutani, M. Kato, T. Masuda, K. Suzuki
  1491

Planetary Strength, Central Peak Oscillation, and Formation of Complex Craters
J. D. O'Keefe, T. J. Ahrens
  1492

Crustal Tension and Collapse on Deformed Areas on Venus
G. G. Ori, L. Marinangeli
  1493

Geochemistry and Nd-Sr Isotope Signature of Tektites (Indochinites, Urengoite) and Impact Melt Glasses (Zhamanshinites, Irghizites)
M. Ostermann, A. Deutsch, V. L. Masaitis
  1494

Evaporation Anisotropy of Forsterite
K. Ozawa, H. Nagahara, M. Morioka
  1495

The Composition of a New R-Chondrite and the Classification of Chondritic Meteorites
H. Palme, G. Weckwerth, D. Wolf
  1496

Re-Os Diffusion into Massive Schreibersite and Possible Internal Isochrons for Iron Meteorites
D. A. Papanastassiou, G. J. Wasserburg, J. J. Shen
  1497

Ion Microprobe Investigation of Plagioclase and Orthopyroxene from Lunar Mg-Suite Norites: Implications for Calculating Parental Melt REE Concentrations and for Assessing Postcrystallization REE Redistribution
J. J. Papike, G. W. Fowler, G. D. Layne, C. K. Shearer
  1498

A Sea Ice Analog for the Surface of Europa
R. Pappalardo, M. D. Coon
  1499

Grooved Terrain on Ganymede: Science Issues to be Addressed Through Galileo Imaging
R. Pappalardo, J. W. Head, Galileo Imaging Team
  1500

High-Temperature Differential Thermal Analysis: Tool for Studying Nucleation Characteristics of Melts
J. M. Paque
  1501

Highlights from 1:500K Geologic Mapping of Central and Southern Argyre Planitia
T. J. Parker
  1502

Identifying Shore Morphology on Mars
T. J. Parker
  1503

Lithospheric Buoyancy: Implications for Global Resurfacing on Venus
E. M. Parmentier, J. W. Head, P. C. Hess
  1504

Statistical Model of Earth-Moon Coaccretion and Macroimpacts
G. V. Pechernikova, A. V. Vityazev
  1505

Downflow Width Behavior of Martian and Terrestrial Lava Flows
M. N. Peitersen, D. A. Crown
  1506

Relationships Among Isotopic Compositions of Solar-System Xenon and Krypton
R. O. Pepin
  1507

Study of Fossil Tracks Due to Fe-Group and Z>=36 Cosmic Ray Nuclei in Olivine Crystals from Luna-16 and Luna 24
V. P. Perelygin, S. G. Stetsenko, R. I. Petrova, D. S. Yadav
  1508

The Development of a High Resolution Gravity Field Model for Venus
J. P. Perini, R. S. Nerem, F. G. Lemoine
  1509

Surface Cleanliness in Lunar Regolith Mechanics
H. A. Perko, J. D. Nelson, W. Z. Sadeh
  1510

New Geophysical and Petrographic Results of the Suvasvesi N Impact Structure, Finland
L. J. Pesonen, M. Lehtinen, A. Deutsch, S. Elo, H. Lukkarinen
  1511

Condensation in the Solar Nebula: Effects of Partial Isolation of Condensates from the Residual Gases
M. I. Petaev, J. A. Wood
  1512

Anorthosite on the Lunar Nearside and Farside
C. A. Peterson, B. R. Hawke, P. G. Lucey, G. J. Taylor, D. T. Blewett, P. D. Spudis
  1513

Non-Chondritic Inclusions in the LL Chondrite DOM85505
K. C. A. Peterson, A. M. Reid, D. W. Mittlefehldt
  1514

Numerical Simulation of the Chicxulub Impact Event
E. Pierazzo, H. J. Melosh, D. A. Kring
  1515

Plagioclase and Maskelynite Diagnostic Features
C. M. Pieters
  1516

Visible to Mid-Infrared Properties of Lunar Soils and Soil Separates
C. M. Pieters
  1517

Anorthosite and Olivine Layers of the Farside Upper Crust at Tsiolkovsky
C. M. Pieters, G. He, S. Tompkins
  1518

Aristarchus Plateau: Clementine Spectro-Imaging and Geological Inferences
P. C. Pinet, P. Martin, F. Costard, S. Chevrel, Y. Daydou, P. E. Johnson
  1519

Geologic Map of Navka Planitia Quadrangle, Venus
J. J. Plaut
  1520

Origin of "Splotches" on Venus
A. V. Pogoretsky
  1521

Isotopic Fractionations by Low-Energy Ion Implantation: A Possible Solar System Process
K. V. Ponganis, Th. Graf, K. Marti
  1522

Carbonate Condensates in the Chicxulub Ejecta Deposits from Belize
K. O. Pope, A. C. Ocampo, A. G. Fischer, J. Morrison, Z. Sharp
  1523

Estimates of Fireball's Mass Based on Luminosity Curves
O. P. Popova, I. V. Nemtchinov
  1524

Tunguska: Petrology and Specific Gravity
H. Povenmire
  1525

Tektite from Houston County, Georgia
H. Povenmire, R. Strange
  1526

Collisions in the Ejecta Plume of the Australasian Impact Event
M. S. Prasad, M. Sudhakar
  1527

The Effect of Bimodal and Polymodal Mixtures of Particle Sizes on the Thermal Conductivity of Particulate Materials Under Martian Atmospheric Pressures
M. A. Presley, P. R. Christensen
  1528

The Effect of Bulk Density and Particle Shape on the Thermal Conductivity of Particulate Materials Under Martian Atmospheric Pressures
M. A. Presley, P. R. Christensen
  1529

Morphological Evidence For Dike Emplacement in a High Pressure Environment
L. M. Prockter, J. W. Head III, D. K. Smith
  1530

The Moon - Natural Standard for Calibration of the Visible and Infrared Images of the Earth
S. G. Pugacheva, V. V. Shevchenko, V. V. Novikov, S. G. Yakovlev, V. M. Kibardin, Yu. M. Kondratyev
  1531

Ion-Microprobe Investigation of Feldspar and Pyroxene from Cumulate Eucrites
A. Pun, J. J. Papike, G. D. Layne
  1532

Cosmogenic KR and Xe Made in the Moon from BR and I
R. C. Reedy, J. Masarik
  1533

Further 40Ar-39Ar Stepheating Dating of Fault Rocks and Metamorphic Minerals from the Vredefort Dome and Witwatersrand Basin
W. U. Reimold, R. L. Gibson, P. W. Layer
  1534

An Analytical Electron Microscope (AEM) Study of Hydrous Alteration in a Smoke of Modal Forsterite Composition
F. J. M. Rietmeijer
  1535

Principal Components Constrain Dynamic Pyrometamorphism in a Partially Melted Interplanetary Dust Particle
F. J. M. Rietmeijer
  1536

The Butterflies of Principal Components: A Case of Ultrafine-Grained Polyphase Units
F. J. M. Rietmeijer
  1537

Evidence for a Deep Terrestrial Magma Ocean: Prediction of Siderophile Element Metal/Silicate Partition Coefficients at P, T, fO2 and Metallic and Silicate Melt Composition
K. Righter, M. J. Drake
  1538

Hypovelocity Impacts in the Asteroid Belt
A. S. Rivkin, W. F. Bottke
  1539

Slope Stability Analysis of Venusian Scarp, Artemis Chasma
W. H. Roadarmel, R. A. Schultz
  1540

Semi-Automated Extraction of a DEM for Studies of Ares Vallis Using Viking Orbiter Imagery
C. A. Robinson, A. C. Cook, W. Zeitler
  1541

A Suggested Geological Development for Ares Vallis, Mars
C. A. Robinson, G. Neukum, H. Hoffmann, A. Marchenko, A. T. Basilevsky, G. G. Ori
  1542

Calibrated Color and Albedo Maps of Mercury
M. S. Robinson, P. G. Lucey
  1543

Spectral Heterogeneity of Lunar Local Dark Mantle Deposits
M. S. Robinson, E. M. Shoemaker, B. R. Hawke
  1544

Why Are Apollo 17 Impact-Melt Breccias Assigned a Serenitatis Origin: A Brief Critical Review
K. M. Rockow, L. A. Haskin
  1545

The Global Features of Cratering on the Moon and Mars
J. F. Rodionova, A. A. Khramchikhin
  1546

Tectonic Evolution of Bell Regio, Venus: Regional Stress, Lithospheric Flexure, and Edifice Stresses
P. G. Rogers, M. T. Zuber
  1547

Crossflow Topographic Effects on the Emplacement of Leveed Lava Flows: Implications for Venusian Lava Flows
P. G. Rogers, M. T. Zuber, B. A. Campbell
  1548

Stable Isotope Analysis of Diatomic Oxygen from SNC Meteorites
C. S. Romanek, E. C. Perry, E. K. Gibson Jr., R. A. Socki
  1549

Oxygen Isotopic Evidence for Aqueous Activity on Mars: Delta 180 of Lafayette Iddingsite
C. S. Romanek, A. H. Treiman, J. H. Jones, E. K. Gibson, R. A. Socki
  1550

Nuclear Tracks and Noble Gases in Ten Unequilibrated H-Chondrites from the Sahara
J. Romstedt, L. Schultz, K. Metzler
  1551

Carbothermal Reduction of Lunar Materials for Oxygen Production on the Moon: Reduction of Lunar Simulants with Carbon
S. D. Rosenberg, O. Musbah, E. E. Rice
  1552

Carbothermal Reduction of Lunar Materials for Oxygen Production on the Moon: Reduction of Lunar Simulants with Methane
S. D. Rosenberg, O. Musbah, E. E. Rice
  1553

Near-IR (0.8-2.5 micrometers) Optical Constants of Water Ice at 100K
T. L. Roush
  1554

Selective Oxidation/Reduction and Impact Melting in Experimental Metal-Silicate Craters
L. R. Rowan, F. Horz, M. Zolensky
  1555

LL6 Galim (a) and EH Galim (b): Redox Reactions in a Heavily Shocked Polymict Breccia
A. E. Rubin
  1556

Experimental Study of KREEP Basalt Evolution: The Origin of QMD and Granite at the Base of the Lunar Crust
M. J. Rutherford, B. Tonks, B. Holmberg
  1557

Formation of Chondrule Precursors in the Presolar Cloud
T. V. Ruzmaikina
  1558

Cratering Impacts into Finite Targets: Comparing Experiments, Code Simulations, and Scaling Laws
E. V. Ryan
  1559

Formation of the Dust Cloud Caused by the Impact of Small Cosmic Body on Mars
V. A. Rybakov, V. I. Artemiev, I. V. Nemtchinov, V. V. Shuvalov, S. A. Medveduk
  1560

Relationships Among Impact Melt Samples From the Taurus-Littrow Massifs, Apollo 17 Landing Site
G. Ryder
  1561

A Model of PHOBOS and its Application to Simulation Study for Asteroid Imaging
J. Saito, H. Akiyama
  1562

Three-Dimensional Modelling of Leveed Lava Flows
S. Sakimoto, S. Baloga, J. Crisp
  1563

PHOBOS and Deimos as Sources of Martian Dust Ring/Torus
S. Sasaki
  1564

Absorption Bands Near 3 Micrometers in Diffuse Reflectance Spectra of Carbonaceous Chondrites: Comparison with Ceres and Pallas
K. Sato, M. Miyamoto
  1565

Venus Ovda Regio Stratigraphy and Tectonics: Highlands-Plains Relationships
R. S. Saunders
  1566

Scientific Analysis and Display of Planetary Data with McIDAS-eXplorer
R. S. Saunders, S. S. Limaye, R. Krauss
  1567

Transformations of Quartz-Plagioclase-Garnet-Clinopyroxene Rock in Spherical Stress Waves
L. Sazonova, E. Kozlov, Yu. Zhugin
  1568

Origins of Palimpsests and Impact Basins on Ganymede
P. Schenk
  1569

Changes in the Noble Gas Pattern of Hot Desert Meteorites Caused by Weathering - Correlation with Terrestrial Age and Weathering Grade
P. Scherer, T. Loeken, L. Schultz
  1570

Lithium-bearing Phases in Ca,Al-rich Inclusions from CM-Chondrites: Indication of Nebular Alteration Processes
S. Schirmeyer, A. Bischoff, T. Stephan, E. K. Jessberger
  1571

Effect of Boundary Conditions on Calculations for Venusian Entry Shock
R. M. Schmidt, K. R. Housen, P. J. Hassig
  1572

85 GPa Shock Recovery Experiments on Granitic Rock Samples: On the Development of Extremely Heterogeneous 'Biotite' Impact Melt Glass
C. Schrand, A. Deutsch, U. Hornemann
  1573

Nature of the Orientale and Crisium Impacts
P. H. Schultz
  1574

Impact Flash Spectroscopy
P. H. Schultz, M. A. Adams, J. W. Perry, J. D. Goguen, S. Sugita
  1575

Extension and Strain Across Valles Marineris
R. A. Schultz
  1576

On the State of Stress and Failure Prediction Near Planetary Surface Loads
R. A. Schultz
  1577

The Canyonlands Grabens Revisited, with a New Interpretation of Graben Geometry
R. A. Schultz, J. M. Moore
  1578

Iridium Metal in Melt Rock from the Chicxulub Impact Basin
B. C. Schuraytz, D. J. Lindstrom, L. E. Marin, R. R. Martinez, D. W. Mittlefehldt, V. L. Sharpton, S. J. Wentworth
  1579

Sector Zoning of Minor and Trace Elements in Synthetic Pyroxenes
C. S. Schwandt, G. A. McKay
  1580

On the Origin and Evolution of Minerals in Chondrite Matrix Material
E. R. D. Scott, A. N. Krot, L. B. Browning
  1581

Petrographic and Rock Magnetic Study of the Central Magnetic Anomaly, Manicouagan Impact Structure, Canada
R. G. Scott, R. A. F. Grieve, M. Pilkington
  1582

Glassy Spherules in Suevite from the Reis Crater, Germany, with Implications for the Formation of Meteoritic Chondrules
D. W. G. Sears, S. Huang, G. Akridge, P. Benoit
  1583

The Lunar Devitrified Glass Spherules: Implications for the Origin of Meteoritic Chondrules
D. W. G. Sears, S. Symes, A. Taunton, G. Akridge, S. Huang, P. Benoit
  1584

Small-Scale Compositional Heterogeneity of Impact Melts
T. H. See, J. H. Wagstaff, S. R. Yang, F. Horz, G. A. McKay
  1585

Geologic Mapping of the Juno Dorsum Quadrangle (V-47), Venus
D. A. Senske
  1586

Hammadah AL Hamra 126--A New Saharan Ureilite
A. Sexton, I. A. Franchi, C. T. Pillinger
  1587

Microstructures of High-Pressure Minerals in the Sixiangkou L6 Chondrite: Constraints on the Duration of Shock Events in Chondrites
T. G. Sharp, M. Chen, A. El Goresy
  1588

The Slate Islands Impact Structure: Structural Interpretation and Age Constraints
V. L. Sharpton, B. O. Dressler
  1589

Major and Trace Element Modeling of a Polybaric Melting Origin for Lunar (Apollo 15) Very Low TI Picritic Magmas
C. K. Shearer, J. J. Papike
  1590

Petrogenetic Models for the Origin of Diogenites and Their Relationship to Basaltic Magmatism on the HED Parent Body
C. K. Shearer, J. J. Papike, G. Fowler
  1591

Hydrothermal Systems on Mars. Insights from Sulfur Isotopic Systematics in Alteration Assemblages in Martian Meteorite Allan Hills 84001
C. K. Shearer, M. N. Spilde, J. J. Papike, G. D. Layne
  1592

Prototype Backscatter Mossbauer Spectrometer (BaMS); Instrumentation Summary and Conclusions
T. D. Shelfer, R. V. Morris, T. Q. Nguyen, D. G. Agresti, E. L. Wills
  1593

Preliminary C, N, He and AR Study of Shock Produced Diamonds from the Popigai Crater and Ebeliakh Placer, Siberia
D. Shelkov, H. J. Milledge, A. B. Verchovsky, F. Kaminsky, C. T. Pillinger
  1594

Surface Roughness, Optical Shadowing, and Radar Backscatter
M. K. Shepard, B. A. Campbell
  1595

A Petrologic Survey of Six Rock Fragments from the Apollo 14 Bulk Sample: 14430, 14436, 14440, 14443, 14444, 14451
J. W. Shervais, G. Shroff, C. B. Thompson
  1596

Analysis of the Asteroid Phase Dependences of Brightness
V. G. Shevchenko
  1597

Giant Comets in Inner Solar System?
V. V. Shevchenko
  1598

Sm-Nd Systematics of Nakhlite Governador Valadares
C.-Y. Shih, L. E. Nyquist, H. Wiesmann
  1599

Cretaceous/Tertiary Impact Ejecta in the Yucatan Basin and the Caribbean: Leg 165 of the Ocean Drilling Project
Shipboard Scientific Party
  1600

Experimental Investigation of the Effect of Cooling Rate on Melilite/Liquid Distribution Coefficients for Sr, Ba, and TI in Type B Refractory Inclusion Melts
S. B. Simon, A. M. Davis, F. M. Richter, L. Grossman
  1601

PGEs and Quartz Grains in a Resedimented Late Archean Impact Horizon in the Hamersley Group of Western Australia
B. M. Simonson, D. Davies, M. Wallace, S. Reeves, S. Hassler
  1602

Inference of Block Populations from Radar Backscatter: Application to Pathfinder Landing Site Characterization
R. A. Simpson, J. E. Baron, G. L. Tyler
  1603

Short-Lived Cosmogenic Radionuclide Production in Lunar Rocks; Improved Estimates for the Solar Proton Flux in Recent Solar Cycles
J. M. Sisterson, R. J. Schneider IV, A. Beverding, C. S. Gans, K. Kim, P. A. J. Englert, C. Castaneda, J. Vincent, R. C. Reedy
  1604

Revised Solar Cosmic Ray Fluxes Estimated Using Measured Depth Profiles of 14C in Lunar Rocks; the Importance of Good 14C Cross Section Determinations
J. M. Sisterson, R. J. Schneider IV, A. J. T. Jull, D. J. Donahue, S. Cloudt, K. Kim, A. Beverding, P. A. J. Englert, C. Castaneda, J. Vincent, R. C. Reedy
  1605

Schreibersite from the Vicenice Iron: Rietveld Crystal Structure Refinement--A Preliminary Report
R. Skala, J. Fryda
  1606

Radar Imaging and Topography of Ares/Maja Valles, Isidis, and Tritonis Lacus Pathfinder Landing Sites
M. A. Slade, R. F. Jurgens, A. F. C. Haldemann
  1607

The International Mars Data Base
S. Slavney, R. E. Arvidson, K. Eichentopf, M. Natenzon, T. Kirsanova, V. Tarnopolsky
  1608

Particle/Planetesimal Orbital Behavior near Proto-Jupiter
B. Smith, R. Nazzario, T. W. Hyde, D. Griffith
  1609

The Accuracy of the Long Wavelength Shape of Mars
D. E. Smith, M. T. Zuber
  1610

The Shape of Mars and the Topographic Signature of the Hemispheric Dichotomy
D. E. Smith, M. T. Zuber
  1611

Microscopic Meteoritic Material at the Dalgaranga, Odessa, and Veevers Meteorite Craters
T. R. Smith, P. W. Hodge
  1612

Re-Os Isotope Systematics in the Cape York Meteorite Shower
M. I. Smoliar, R. J. Walker, J. W. Morgan
  1613

Towards a Comprehensive Model of Coronae Formation on Venus
S. E. Smrekar, E. R. Stofan
  1614

Admittance Spectra and Elastic Thickness Estimates for Venusian Coronae
S. E. Smrekar, J. S. Yu
  1615

Galileo's Near Infrared Mapping Spectrometer (NIMS) Science at Io: Objectives, Plans, and Predictions
W. Smythe, R. Lopes-Gautier, A. Davies, R. Carlson, L. Soderblom, Galileo NIMS Team
  1616

Apollo 14 High-Al Basalts May Not Represent Earliest Volcanism on the Moon: The Enigma of Disturbed Sm-Nd and Undisturbed Rb-Sr Isotopic Systems
G. A. Snyder, L. A. Taylor
  1617

Probing the Crust of the Earth's Moon: Trace-Elements in Minerals from Post-Magma Ocean Highlands Rocks
G. A. Snyder, G. Crozaz, L. A. Taylor
  1618

A Sortie for Pristine Moon Rocks from Oceanus Procellarum: 1. Basalts and Impact Melts from Soil 12001
G. A. Snyder, L. A. Taylor, A. Patchen
  1619

A Sortie for Pristine Moon Rocks from Oceanus Procellarum: 2. Cumulate 'Highlands' Gabbros from Soil 12001
G. A. Snyder, L. A. Taylor, A. Patchen
  1620

Journey to the Center of the Regolith, Revisited: Mineral Chemistry of Ferroan Anorthosites from Drive Tube 68001/68002
G. A. Snyder, L. A. Taylor, A. Patchen
  1621

Transition from Plate Tectonics to Stagnant Lid Convection on Venus 500 M.Y. Ago
V. S. Solomatov
  1622

The Isostatic State of the Lunar Highlands from Spatio-Spectral Localization of Global Gravity, Topography, and Surface Chemistry
S. C. Solomon, M. Simons
  1623

Nusselt-Rayleigh Relationship for a Fluid Heated from Below and from Within: Application to the Cooling Rate of the Martian Core
C. Sotin, S. Labrosse, A. Mocquet
  1624

Pyroxenes from Lunar High-Ti Mare Basalts: Oxygen Analysis by Electron Microprobe and Estimates of Ti^3+/Ti^4+
M. N. Spilde, J. J. Papike
  1625

Mid-Infrared Spectroscopy of Mercury from the Kuiper Airborne Observatory
A. L. Sprague, F. C. Witteborn, R. W. H. Kozlowski, D. H. Wooden
  1626

Morphometry of Basins on the Moon: New Results from Clementine Laser Altimetry
P. D. Spudis, C. D. Adkins
  1627

Composition of the Ejecta Deposits of Selected Lunar Basins from Clementine Elemental Maps
P. D. Spudis, B. R. Hawke, P. G. Lucey, G. J. Taylor, K. R. Stockstill
  1628

New Evidence for 26Al in CAI and Chondrules from Type 3 Ordinary Chondrites
G. Srinivasan, S. S. Russell, G. J. MacPherson, G. R. Huss, G. J. Wasserburg
  1629

Craters as Indicators of Compositional Stratigraphy in Mare Tranquillitatis and Serenitatis
M. I. Staid, C. M. Pieters
  1630

Temporal Variations in the North-South Asymmetry of Polarized Light of Jupiter
O. M. Starodubtseva, L. A. Akimov, V. V. Korokhin
  1631

Computer Simulation of PHOBOS Spectrum: Implication to Surface Composition
L. V. Starukhina, Yu. G. Shkuratov
  1632

Extraterrestrial Forsterite: Review of Present Knowledge
I. M. Steele
  1633

TOF-SIMS Analysis of Interstellar SiC Grains
T. Stephan, E. K. Jessberger
  1634

From Dust to Planetesimals: Global Evolution of Ice in the Solar Nebula
T. F. Stepinski, P. Valageas
  1635

Polycrystalline Methane Clathrate: A New Method of In Situ Synthesis, and Its Phase Stability and Rheology at High Pressures
L. A. Stern, S. H. Kirby, W. B. Durham
  1636

Planetesimal Dynamics at the Center of a Resonance
G. R. Stewart
  1637

Clues to the Composition of the Iapetus Dark Material: A 0.67-Micrometer Absorption Feature
K. R. Stockstill, S. M. Larson, F. Vilas, M. J. Gaffey
  1638

Geology of the Aino Planitia Quadrangle (V46): Relative Timing of Tectonism and Volcanism
E. R. Stofan, J. E. Guest
  1639

New Insights into Corona Evolution on Venus: Implications for Models of Origin
E. R. Stofan, S. E. Smrekar
  1640

Impact Order Framework for Small Body Geology
P. J. Stooke
  1641

Preliminary Mapping of Asteroid 4179 Toutatis
P. J. Stooke
  1642

Porosity of Interplanetary Dust Particles
M. M. Strait, K. L. Thomas, D. S. McKay
  1643

Impact Vapor Generation Inferred from Run-out Flows on Venus
S. Sugita, P. H. Schultz
  1644

Imager for Mars Pathfinder Windsock Experiment
R. Sullivan, R. Greeley, G. Wilson, P. Smith, C. Cooper
  1645

In Situ Determination of Chromium Oxidation State in Olivine from Chondrules
S. R. Sutton, S. Bajt, R. Jones
  1646

Simulations of the Comet Fall in the Jovian Atmosphere
V. V. Svetsov
  1647

I-Xe Systematics in Sulfide (FeS) and Silicate in a Chondrule from Semarkona
T. D. Swindle, J. N. Goswami, K. Kehm, C. M. Hohenberg
  1648

Noble Gases in Martian Meteorite QUE94201
T. D. Swindle, B. Li, D. A. Kring
  1649

Thermal Histories of Lunar Meteorites and Apollo Samples: A Thermoluminescence Overview
S. J. Symes, P. H. Benoit, D. W. G. Sears
  1650

Fragment Velocity Dependence on Fragment Mass of Impact Fragmentation Phenomena
Y. Takagi, A. M. Nakamura, A. Fujiwara
  1651

Noble Gases Released by Crushing from Happy Canyon E-Chondrite
N. Takaoka, T. Nakamura, K. Nagao
  1652

Comet Shoemaker-Levy 9 Impact on Jupiter: Plume, Ejecta, and Scaling of Fragment Size
T. Takata
  1653

Formation of Large Impact Basins on the Moon: Numerical Simulations of Impact Cratering on Spherical Targets
T. Takata
  1654

Recrystallization of Ca-Rich Phases in Eucrites and Constraints on the Time of the Crustal Metamorphism
H. Takeda, L. E. Nyquist, A. Yamaguchi, M. Miyamoto
  1655

Geologic History of Chryse Basin, Mars: New Crater Counts and Mapping Results
K. L. Tanaka
  1656

Measurement of Tectonic Strain Based on Crater Elongations: an Improved Technique Applied to Tempe Terra, Mars
K. L. Tanaka, M. P. Golombek
  1657

Possible Coronae Structures in the Tharsis Region of Mars
K. L. Tanaka, J. M. Dohm, T. R. Watters
  1658

Composition of the Lunar Maria
G. J. Taylor, P. G. Lucey, B. R. Hawke, P. D. Spudis
  1659

A New Source of Micrometeorites: The South Pole Water Well
S. Taylor, J. Lever, R. Harvey
  1660

Lead Isotope Systematics of Leached Meteoritic Minerals
F. Tera, R. W. Carlson, N. Z. Boctor
  1661

Surface Geology Analysis of the Moon Using Data Obtained by Clementine
J. Terazono, Y. Takizawa, J. Haruyama, H. Ohtake, K. Kumita, Y. Matano, H. Kanbara, T. Sanga, R. Kouda
  1662

A New Isotope Effect and Its Possible Role in the Production of Excess Meteoritic 33S and Carbonaceous Material (Q?)
M. H. Thiemens, X. Xu, J. Colman, W. C. Trogler
  1663

Microanalysis of Unique Fine-grained Minerals in the Martian Meteorite ALH84001
K. L. Thomas, C. Romanek, D. S. McKay, L. P. Keller, E. K. Gibson
  1664

Effect of Planetesimal Impacts on Mantle Differentiation
Y. Toda, Y. Abe
  1665

Distribution Coefficients for La, Sm, SC and CO Between Plagioclase and Low La-Magma
S. Togashi
  1666

Classification of Central Peak Compositions on the Moon
S. Tompkins, C. M. Pieters
  1667

Spectral Variations Among Crystalline and Glassy Apollo 17 Impact Melt Rocks
S. Tompkins, C. M. Pieters, G. Ryder
  1668

Cumulate Eucrites Formed from Normal Eucritic Magmas
A. H. Treiman
  1669

Fault-Continuation Ridges in the Valles Marineris, Mars: Evidence for Groundwater Circulation
A. H. Treiman, K. Spiker
  1670

'Nakhlites' on Earth: Chemistry of Clinopyroxenites from Theo's Flow, Ontario, Canada
A. H. Treiman, M. Norman, D. Mittlefehldt, J. Crisp
  1671

A San Andreas-sized Strike-Slip Fault on Europa
B. R. Tufts
  1672

Martian Tectonics: Why the Global Dichotomy and the Tharsis Uplift
D. L. Turcotte
  1673

Finite-Element Modeling of the Vredefort Impact Structure with Implications for the Collapse and Modification Stage of Large Crater Formation
E. P. Turtle, H. J. Melosh
  1674

Impact-Induced Devolatilization and D/H Isotopic Fractionation of Serpentine-Metal Mixtures
J. A. Tyburczy, T. J. Ahrens, X. Xu, S. Epstein
  1675

Possible Origin of Li, Be and B in the Early Solar System
G. K. Ustinova
  1676

Statistically Weighted Production Cross Sections of Li, Be and B Isotopes
G. K. Ustinova
  1677

Automated SEM Analysis of Fine-Grained Dust from Antarctica Ice Cores
T. B. Vanderwood, M. Maurette, J. P. Bradley, C. Engrand, G. Kurat, J. R. Petit, N. I. Barkov
  1678

The Supernova Trigger Revisited: Numerical Simulations
H. Vanhala, A. G. W. Cameron, P. Hoflich
  1679

Cathodoluminescence of Murchison Forsterite: Temperature Dependence and Structural Implications
M. A. Z. Vasconcellos, I. M. Steele
  1680

The Carriers of Noble Gases in Presolar Diamonds--A Case of ALICE in Wonderland?
A. B. Verchovsky, C. T. Pillinger
  1681

Lunar Crustal Modeling of Mare Orientale from Clementine Satellite Observations
R. R. B. von Frese, L. Tan, L. V. Potts, C. J. Merry, J. D. Bossler
  1682

QUE94201: A New and Different Shergottite
M. Wadhwa, G. Crozaz
  1683

Age Relations of Geologic Units in the Gruithuisen Region of the Moon Based on Crater Size-Frequency Measurements
R. J. Wagner, J. W. Head III, U. Wolf, G. Neukum
  1684

Digital Terrain Models and Rectified Color Ratio Mosaics in the Mare Orientale Region Derived from Clementine Image Data
M. Wahlisch, W. Zhang, T. Roatsch, J. Oberst, A. C. Cook, H. Hiesinger, R. Jaumann
  1685

Osmium Isotope Constraints on the Origin of Highly Siderophile Elements in the Earth's Primitive Upper Mantle
R. J. Walker, T. Meisel, J. W. Morgan
  1686

Shock-Metamorphism in Sixiangkou Chondrite from China
H.-N. Wang, C.-Y. Lin, F.-S. Zhang, H.-Z. Xu
  1687

The Chemical Composition of the Martian Interior
H. Wanke, G. Dreibus
  1688

Dynamical Friction in Keplerian Disks
W. R. Ward
  1689

Global Inventory of Lunar Impact Melt as a Function of Parent Crater Size
P. H. Warren
  1690

Provenance and Dissemination of Impact-melted Matter During Large Impacts
P. H. Warren
  1691

A Hydrodynamic Control of Channel Morphology in Unsaturated Regoliths on Earth and Mars
P. A. Washington, R. A. de Hon
  1692

The Abundances of Actinides and Short-Lived Non-Actinides in the ISM
G. J. Wasserburg, M. Busso, R. Gallino
  1693

Possible Formation of the Vesta-Family Asteroids and the Main IRAS Dust Band by an Oblique Impact on Vesta
J. T. Wasson, C. R. Chapman, K. Grogan, S. F. Dermott
  1694

Morphologic Studies of Mare Wrinkle Ridges Using LIDAR Data
T. R. Watters, M. S. Robinson
  1695

Photoclinometric Studies of Lobate Scarps on Mars
T. R. Watters, M. S. Robinson
  1696

New Meteorite Finds from the Libyan Sahara
D. Weber, A. Bischoff
  1697

Unusual Equilibrated Carbonaceous Chondrites and CO3 Meteorites from the Sahara
D. Weber, R. N. Clayton, T. K. Mayeda, A. Bischoff
  1698

Production of Chondrules by Lightning in the Solar Nebula
S. J. Weidenschilling
  1699

The Origin of Structure in Cometary Nuclei by Accretion in the Solar Nebula
S. J. Weidenschilling
  1700

Modeling Accretion in the Region of Terrestrial Planets
S. J. Weidenschilling, D. R. Davis
  1701

Primitive Differentiated Achondrite Divnoe and Its Relationship to Brachinites
A. Weigel, O. Eugster, C. Koeberl, U. Krahenbuhl
  1702

Experimental Constraints on the Lower Limit of Chondrule Cooling Rates
S. Weinbruch, H. Buttner, M. Rosenhauer, R. H. Hewins
  1703

A Petrologic and Oxygen Isotopic Study of Six Allende Dark Inclusions: Evaluation of Nebular vs. Asteroidal Models for Their Origin
M. K. Weisberg, M. Prinz, J. S. Boesenberg, G. Kozhushko, R. N. Clayton, T. K. Mayeda, M. E. Ebihara
  1704

The Size Distribution of Cometary Nuclei
P. R. Weissman, H. F. Levison
  1705

Eruption and Emplacement of Lunar Pyroclastic Glasses as Inferred from the 74001/2 Section
C. M. Weitz, J. W. Head III, D. S. McKay
  1706

Oxidation States During Ascent and Eruption of the 74001/2 Orange Glass Magma
C. M. Weitz, M. J. Rutherford, J. W. Head III
  1707

Trace Elements in Vitrophyric Glass and Lithic Clasts from 78526, A VLT-Basaltic Impact Melt
K. C. Welten, D. J. Lindstrom, R. R. Martinez
  1708

A Search for Dust Devils on Mars
A. Wennmacher, F. M. Neubauer, M. Patzold, J. Schmitt, K. Schulte
  1709

A Formational Model for the Martian Polygonal Terrains
M. L. Wenrich, P. R. Christensen
  1710

Water-Based Alteration of the Martian Meteorite, QUE94201, By Sulfate-Dominated Solutions
S. J. Wentworth, J. L. Gooding
  1711

Patina on Apollo 17 Breccia 76015: SEM Petrography and Mossbauer Spectrometry
S. J. Wentworth, R. V. Morris, T. D. Shelfer, T. Q. Nguyen, L. P. Keller, D. S. McKay
  1712

Comparison of Numerical Integration and 'Gas Dynamic' Modelling of Runaway Planetesimal Growth
G. Wetherill, E. Kokubo, S. Ida, J. Chambers
  1713

Minimum Aeolian Particle Threshold on Mars
B. R. White, R. Greeley
  1714

Internal Crater Modification on Venus: Implications of Interior Crater Morphometry
R. W. Wichman
  1715

The Structure and Compensation of the Lunar Highland Crust
M. A. Wieczorek, R. J. Phillips
  1716

Solar Noble Gases in Single Lunar Regolith Grains: Xe-Kr-Ar Fractionation in the Solar Corpuscular Radiation Confirmed
R. Wieler, K. Kehm, A. P. Meshik, C. M. Hohenberg
  1717

Summary of Field Evidence for Thermal erosion by Channelized Archean and Proterozoic Komatiite Lava Flows
D. A. Williams, C. M. Lesher
  1718

Habitable Planets with High Obliquities
D. M. Williams, J. F. Kasting
  1719

Lunar Free Libration
J. G. Williams, X. X. Newhall, C. F. Yoder, J. O. Dickey
  1720

Re-evaluation of Mare Thicknesses Bases on Lunar Crater Depth-Diameter Relationships
K. K. Williams, M. T. Zuber
  1721

Conjugate Shear Fractures at 'Ki Corona,' Southeast Parga Chasma, Venus
J. J. Willis, V. L. Hansen
  1722

Lunar Linear Rilles as Surface Manifestations of Dikes: Theoretical Considerations
L. Wilson, J. W. Head
  1723

Properties of Volcanic Intrusions and Eruptions on 4 Vesta
L. Wilson, K. Keil
  1724

Coagulation of Very Small Iron Grains With 'Web-Like' Structures
P. A. Withey, J. A. Nuth
  1725

Must the Venus Surface Material Contain Hematite?
J. A. Wood
  1726

Processing of Chondritic and Planetary Materials in Shocks Associated with Spiral Density Waves in the Solar Nebula
J. A. Wood
  1727

Whither CRIL?
I. P. Wright, M. J. Wight, J. M. Gibson, M. M. Grady, C. T. Pillinger
  1728

IR Spectroscopic Evidence of Metal Carbonyl Clusters in the Jiange H5 Chondrite
Y. Xu, X. Xiao, S. Sun, Z. Ouyang
  1729

Mass Fractionation of Germanium Isotopes in Canyon Diablo Spheroids
S. Xue, Y.-L. Yang, G. F. Herzog, G. S. Hall
  1730

Zinc Losses from and Zinc Isotopic Abundances in Residues Formed by Heating of Zn, ZnO, ZnS, and Zn-Doped Silicate Glass
S. Xue, Y. Yu, R. H. Hewins, G. S. Hall, G. F. Herzog
  1731

Numerical Simulation of I-type Spherule Formation
T. Yada, M. Sekiya, T. Nakamura, N. Takaoka
  1732

High-Temperature Vaporization in the Albite-Orthoclase System
O. I. Yakovlev, Yu. P. Dikov, M. V. Gerasimov, A. M. Bychkov, F. Wlotzka
  1733

Petrology of Unique Impact Melt Rock, Ramsdorf (L Chondrite)
A. Yamaguchi, E. R. D. Scott, K. Keil
  1734

Three Unbrecciated Equilibrated Eucrites: Global Metamorphism on the Eucrite Parent Body
A. Yamaguchi, G. J. Taylor, K. Keil
  1735

Achondrite Binda; Ordinary Eucrite or the Only Crystalline Howardite?
K. Yanai
  1736

Shock Vaporization of Anhydrite and Calcite and the Effect on Global Climate from K/T Impact Crater at Chicxulub
W. Yang, T. J. Ahrens, G. Chen
  1737

NUR--A Possible Proxy for CHUR Reference for the Re-Os System Derived from 187Os/188Os Ratio of the Allende CAI
Q. Yin, E. Jagoutz, H. Palme, H. Wanke
  1738

Characteristics of Individual Eruptive Events on the Lunar Western Limb and Farside: Implications for Magma Ascent and Eruption Mechanisms
R. A. Yingst, J. W. Head III
  1739

Characteristics of Mare Deposits on the Eastern Limb of the Moon: Implications for Magma Transport Mechanisms
R. A. Yingst, J. W. Head
  1740

Fractality of Impact Crater Outflows on Venus
J. You, K. Kauhanen, J. Raitala
  1741

Distribution of Opaque Minerals in Primitive Achondrites
K. Yugami, H. Takeda, H. Kojima, M. Miyamoto
  1742

Chondrule Precursors: The Nature of the S- and Ni-bearing Phases(s)
B. Zanda, M. Bourot-Denise, R. H. Hewins
  1743

Comparison Between Elemental Ratios in Fusion Crusts of Stannern Eucrite, Lunar Meteorite MAC 88105 & Martian Meteorite Nakhla
M. Zbik, V. A. Gostin
  1744

A Close Look at the Locations of Ejecta Blocks on the Surface of the Asteroid Ida
W. Zeitler, J. Oberst, B. Giese
  1745

New Estimates of the Adsorption of H2O on Martian Surface Materials
A. P. Zent
  1746

Interaction of the Forming Protoplanetary Disk and the Accretion Envelope
I. N. Ziglina, A. B. Makalkin, V. S. Safronov
  1747

Initial Investigation of the Enigmatic Massive Deposits in Amazonis Planitia, Mars
J. Zimbelman, D. Crown, D. Jenson
  1748

Geologic Map of the Ascraeus Mons Volcano, Mars
J. Zimbelman, A. Johnston, C. Lovett, D. Jenson
  1749

Occurrence of Hercynite in the Ordinary Chondrite Yamato-82133 (H3)
N. G. Zinovieva, O. B. Mitreikina, L. B. Granovsky
  1750

Nitrogen Isotopic Composition of Metal and Graphite Separates from the EL Taco (IAB) Iron Meteorite
J. Zipfel, K. J. Mathew, K. Marti
  1751

Mineralogical and Compositional Study of an Allende Dark Inclusion
M. E. Zolensky, A. N. Krot
  1752

The Origin of Round Phyllosilicate Aggregates in CR2 and CI1 Chondrites
M. E. Zolensky, M. Hyman, M. W. Rowe, M. K. Weisberg
  1753

Fine-Grained Inclusions in Type 3 Ordinary and Carbonaceous Chondrites
M. E. Zolensky, A. N. Krot, M. K. Weisberg, P. C. Buchanan, M. Prinz
  1754

The Effect of the Atmosphere of Mars on the Planet's Rotation and Gravity Field
M. T. Zuber, D. E. Smith, R. M. Haberle
  1755

What Factors Control the Long Wavelength Shape of the Moon?
M. T. Zuber, D. E. Smith, G. A. Neumann, F. G. Lemoine
  1756