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Pseudocraters as indicators of ground ice on Mars
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Author and Affiliation:
Frey, Herbert(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Abstract: Positive identification of Martian pseudocraters would be a strong indication of past occurrence of ice at or near the surface of Mars. The basis for suggesting that small cones on Mars are pseudocraters includes: (1) small size, (2) abundant but patchy distribution on what appear to be volcanic plains, (3) presence of other features suggestive of surface or subsurface ice, (4) morphological similarities to Icelandic pseudocraters, and (5) the similarity in distribution of crater/cone diameter ratios to Icelandic pseudocraters. This last morphometric parameter may be the most important, since other possible small terrestrial volcanic analogs have very different crater/cone diameter ratio distributions. In a survey of the available high resolution Viking Orbiter imagery, abundant fields of possible pseudocraters were found. However, only a small fraction of the plains forming units imaged at high resolution were found to contain the small cones. This low discovery rate, combined with the limited high resolution imagery, restrict Martian pseudocraters as global indicators of surface or subsurface ice. The meanings of this terrain analysis are discussed.
Publication Date: May 01, 1987
Document ID:
19870014041
(Acquired Nov 04, 1995)
Accession Number: 87N23474
Subject Category: LUNAR AND PLANETARY EXPLORATION
Document Type: Technical Report
Publication Information: NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986; p 330-332
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 3p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: CONES (VOLCANOES); GEOMORPHOLOGY; LAND ICE; LAVA; MARS CRATERS; MARS SURFACE; MARS VOLCANOES; PLANETARY EVOLUTION; STEAM; TERRAIN ANALYSIS; VOLATILITY
Imprint And Other Notes: In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 330-332 (SEE N87-23341 16-91)
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