| Summary: | The Program Committee for the Eighteenth Lunar and Planetary Science Conference has chosen these contributions as having the greatest potential interest for the general public. The papers in this collection have been written for general presentation, avoiding jargon and unnecessarily complex terms. More technical abstracts will be found in Lunar and Planetary Science XVIII. Compiled by the Lunar and Planetary Institute Evolution of an Impact-Generated H20-C02 Atmosphere and Formation of a Hot Proto-Ocean on Earth / Y. Abe and T. Matsui--Spectral Alteration Effects in Chondritic Gas-Rich Breccias: Implications for S-Class and Q-Class Asteroids / J.F. Bell and K. Keil--A High Abundance and Great Diversity of "Unmelted" Cosmic Dust on the West Greenland lee Cap / Ph. Bonte, C. Jehanno, M. Maurette, and E. Robin--Miranda Geology: Exotic lees on the Rocks / S.K. Croft.--The D/H and 18O/16O Isotopic Ratios in Comet Halley / P. Eberhardt, R.R. Hodges, D. Krankowsky, J.J. Berthelier, W. Schulte, U. Dolder, P. Lammerzahl, J.H. Hoffman, and J.M. llliano--The Geology of Pavonis Mons, Mars / K. Edgett, J.R. Zimbelman, and J.W. Branstrator--Hydrogen Distributions in Lunar Materials / E.K. Gibson, Jr., R. Bustin, A. Skaugset, R.H. Carr, S.J. Wentworth, and D.S. McKay--Martian (?) Calcite and Gypsum in Shergottite EETA79001 / J.L. Gooding, S.J. Wentworth, and M.E. Zolensky--Meteorites From the Planets / C.A. Goodrich and J.H. Jones--1986 DA and 1986 EB: Iron Objects in Near-Earth Orbits--A Bonanza for Science and Space Industrialization / J. Gradie and E.F. Tedesco--The Beta Pictoris Circumstellar Disk: A Forming Solar System? / J. Gradie, J. Hayashi, B. Zuckerman, H. Epps, and R. Howell--Venus Varnish: Modification of the Surface by Windblown Particles / R. Greeley, J.R. Marshall, and J.B. Pollack--Origin and Evolution of Valleys on Martian Volcanoes: The Hawaiian Analog / V.C. Gulick and V.R. Baker--Evidence for Topographic Rises, Fracture Zones, Topographic Symmetry, Central Rift Zones, Transform Faults, and Crustal ...
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