The Program Committee for the Tenth 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 X.Compiled by the Lunar and Planetary Institute.PARTIAL CONTENTS: Are Early Magnesium-Rich Volcanic Materials Widespread in Basins on the Moon? / C.G. Andre, R.W. Wolfe and I. Adler--An Explosion Crater Comparable to Meteor Crater, Arizona (Calculational Comparisons of Explosion and Impact Cratering Using Barringer Crater as a Prototype) / J.B. Bryan, D.E. Burton and L.A. Lettis, Jr...