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Browsing LPI Contributions by Author "Sharpton, Virgil L."

Browsing LPI Contributions by Author "Sharpton, Virgil L."

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  • Clastic breccias at the Slate Islands Complex Impact Structure, Northern Lake Superior 
    Dressler, Burkhard O.; Sharpton, Virgil L. (Ontario Geological Survey, 1996)
    Provides a summary of the impact process. Also some of the results of laboratory investigations conducted in 1995 and 1996. Describes the various clastic breccias encountered on the islands during 1994 and 1995 field work ...
  • Conference on Large Meteorite Impacts and Planetary Evolution (Sudbury 1997) 
    Deutsch, Alexander; Dressler, Burkhard O.; Sharpton, Virgil L. (Lunar and Planetary Institute, 1997)
    Topics considered include: Petrography, geochemistry and geochronology; impact-induced hydrothermal base metal mineralization; nickel-and platinum group element -enriched quartz norite in the latest Jurassic morokweng ...
  • Detecting a Periodic Signal in the Terrestrial Cratering Record 
    Grieve, Richard A. F.; Sharpton, Virgil L.; Rupert, James D.; Goodacre, Alan K. (Cambridge University Press, 1988)
    Time-series analyses of periodic, random, and a mixture of periodic and random ages indicate that it is difficult to consistently detect a period if age uncertainties are present. This problem is present in real data taken ...
  • The Evolution of Volcanism, Tectonics, and Volatiles on Mars: An Overview of Recent Progress 
    Zimbelman, James R.; Solomon, Sean C.; Sharpton, Virgil L.; https://orcid.org/0000-0002-0420-8453 (Lunar and Planetary Institute, 1991)
    Mars has been the target of a number of ambitious spacecraft missions, including the American Viking orbiters and landers in the late 1970s and, more recently, the Soviet Phobos spacecraft in 1989. Soon after the Viking ...
  • Iridium and Trace Element Measurements from the Cretaceous-Tertiary Boundary, Site 752, Broken Ridge, Indian Ocean 
    Schuraytz, B. C.; O'Connell, S.; Sharpton, Virgil L. (Ocean Drilling Program, 1991)
    Fourteen samples spanning a 2.5 m interval that includes the Cretaceous-Tertiary (K/T) boundary from Hole 752B near the crest of Broken Ridge in the eastern Indian Ocean, were studied in order to search for anomalous ...
  • Lunar Mare Ridges: Analysis of Ridge-Crater Intersections and Implications for the Tectonic Origin of Mare Ridges 
    Sharpton, Virgil L.; Head, James W. (Lunar and Planetary Institute, 1988)
    We have investigated the nature of ridge-crater intersections to gain a better understanding of mare ridge formation. Distinct evidence of ridge-related deformation was observed in 65 small craters within the lunar maria ...
  • Stones, wind, and ice : a guide to Martian impact craters 
    Barlow, Nadine G.; Sharpton, Virgil L.; https://orcid.org/0000-0002-5588-294X (Planetary Image Center/Lunar and Planetary Institute, 1987)
    Illustrates the diversity of Martian impact craters and demonstrates their role in understanding the geological evolution of Mars
  • Terrestrial impact craters 
    Koeberl, Christian, 1959-; Sharpton, Virgil L. (Lunar and Planetary Institute, 2001)
    Orbital and aerial views of impact craters on Earth; some extraterrestrial structures included for comparison.
  • Venus Surface Mineralogy: Observational and Theoretical Constraints 
    Fegley, Bruce; Treiman, Allan H.; Sharpton, Virgil L.; https://orcid.org/0000-0002-8073-2839 (Lunar and Planetary Institute, 1992)
    We utilize Earth-based, Earth-orbital, and spacecraft observations of the atmosphere and surface of Venus, thermodynamic models of atmosphere-lithosphere interactions, and where available kinetic data on relevant gas-solid ...
  • Workshop on Venus Exploration Targets : May 19-21, 2014 Houston, Texas 
    Esposito, Larry; https://orcid.org/0000-0003-3381-2016; Sharpton, Virgil L.; Sotin, Christophe; https://orcid.org/0000-0003-3947-1072 (Lunar and Planetary Institute, 2014)
    The primary goal of this workshop is to identify and evaluate key locations, transects, and regions (on the surface or within the atmosphere) for future exploration of planet Venus. Appropriate candidate targets include ...

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