Press abstracts, Twentieth Lunar and Planetary Science Conference : March 13-17, 1989

The Program Committee for the Twentieth 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 XX.Compiled by the Lunar and Planetary Institute.Maps of Part of the Venus Northern Hemisphere: A Joint US-USSR Mapping Project / A.T. Basilevsky, G.A. Burba, and R.M. Batson--Prospecting the Moons of Mars / J.F. Bell, P.G. Lucey, J.C. Gradie, J.C. Granahan, D.J. Tholen, J.R. Piscitelli, and L.A. Lebofsky--Identification and Characterization of a Carbonaceous, Titanium Containing Interplanetary Dust Particle / D.F. Blake, R.H. Fleming, and T.E. Bunch--Telescopic Detection of Sulfur Compounds on Mars / D.L. Blaney and T.B. McCord--39Ar-40Ar Ages of Eucrites: Did the HED Parent Body Experience a Long Period of Thermal Events due to Major Impacts? / D.D. Bogard and D.H. Garrison--Possible Scenarios Resulting from the Giant Impact / A.G.W. Cameron and W. Benz--New Arecibo High-Resolution Radar Images of Venus: Preliminary Interpretation / D.B. Campbell, A.A. Hine, J.K. Harmon, D.A. Senske, R.W. Vorder Bruegge, P.C. Fisher, S. Frank, and J.W. Head--Origin of Xe-HL and Supernova 1987A / D.D. Clayton--Glimmerings from the Past: Light Emitted by Meteorites under an Electron Beam Provides Clues to the History of the Early Solar System / J. DeHart, D. Sears, and G. Lofgren--Statistical Evolution of Impact Ejecta from the Earth--Implications for Transfer to Other Solar System Bodies / S.A. Finney, W.B. Tonks, and H.J. Melosh--Overlapping Large Impacts and the Origin of the Northern Lowlands of Mars / H. Frey and R. Schultz--Geochronological Investigations in Superstring Cosmology / C.L. Harper--The Light of Reason: The Light Released on Heating Reveals the Secrets of Meteorites from the Antarctic / F.A. Hasan, D.W.G. Sears, and R. Score--Allende Olivine Chondrules, Ferroan Olivine and Oxidation / R.H. Hewins, J.M. Kozul and G.C. Ulmer--Influence of Melting Kinetics on the Formation of Barred Olivine Chondrules / R.H. Hewins, P.M. Radomsky, and H.C. Connolly--Search for Debris of the Tunguska Meteor: Analytical Study of Spherules from the Explosion Site / C. Jehanno, D. Boclet, J. Danon, E. Robin, and R. Rocchia--The Crystallization of Iron-rich Olivine Chondrules in the Unaltered Chondrite, Semarkona / R.H. Jones--Rheological Extremes of Cryogenic Liquids on Icy Satellites / J.S. Kargel and S.K. Croft--Identification of Possible Solar Nebula Condensates in Interplanetary Dust Particles and Meteorites / W. Klock, K.L. Thomas, and D.S. McKay--Dynamic Crystallization Experiments on Chondrule Melts: Origin of Droplet Chondrule Textures and Limits on the Chondrule Forming Process / G. Lofgren--An Enstatite Crustal Composition for Mercury? / P.G. Lucey and J.F. Bell--Constraints on Geologic Processing of Primitive Meteorites in Asteroids / T.J. McCoy, E.R.D. Scott, R.H. Jones, and K. Keil--Geologic Evidence Supporting an Endogenic Origin for the Martian Crustal Dichotomy / G.E. McGill--Early Stages in the Birth of the Moon / H.J. Melosh and M.E. Kipp--207 Pb/206 Pb Ages of Zircon-containing Rock Fragments Indicate Continuous Magmatism in the Lunar Crust from 4350 to 3900 Million Years / C. Meyer, I.S. Williams, and W. Compston--Compositional Stratigraphy of the Lunar Highland Crust / C.M. Pieters--CO2-3 and SO2-4 Bearing Anionic Complexes Detected in Martian Atmospheric Dust / T. Roush, J.H. Pollack, C. Stoker, F. Witteborn, J. Bregman, D. Wooden, and D. Rank--The Unique Ancient Bombardment in the Earth-Moon System: Collision of Two Other Earth Moons 3.9 Billion Years Ago? / G. Ryder--Fluid Volcanism on Miranda and Ariel / P.M. Schenk--On Reported Occurrences of Shock-deformed Clasts in the Volcanic Ejecta from Toba Caldera, Sumatra / V.L. Sharpton and B.C. Schuraytz--Photochemical Haze on Triton / J.A. Stansberry, J.I. Lunine, and M.G. Tomasko--Impact Delivery of Organic Molecules to the Early Earth and Implications for the Terrestrial Origins of Life / P.J. Thomas, C.F. Chyba, L. Brookshaw, and C. Sagan--Weak Fe2 + - Fe3 + Charge Transfer Absorption Features Seen in CM2 Carbonaceous Chondrites and Narrowband Reflectance Spectra of Primitive Asteroids / F. Vilas and M.J. Gaffey--Unique Meteorites: Clues to Early Solar System Conditions and Processes / M.K. Weisberg and M. Prinz