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Ice-Associated Impact Craters on Mars: Implications from MOLA ObservationsImpact features adjacent to the permanent North Polar Cap on Mars provide a unique perspective on the crater formation and modification process. Little attention has been previously paid to the dozen's of ice-associated or 'frost-filled' craters north of 70N on Mars. We have examined Mars Orbiter Laser Altimeter (MOLA) cross-sections of 13 of these features between 7ON and 82N in an effort to understand cavity modification processes potentially associated with the advance and retreat of the North Polar ice cap. Here we treat the general geometric properties of these impact features and focus attention on one almost entirely filled example (i.e., 32 km diameter, located at 77N, 89E) for which high resolution Viking Orbiter images (50 m per pixel) provide key constraints for interpreting MOLA's meter-precision topographic measurements.
Document ID
19990028347
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Garvin, J. B.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Sakimoto, S. E. H.
(Universities Space Research Association Greenbelt, MD United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1998
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar and Planetary Sciences
Location: Houston, TX
Country: United States
Start Date: March 15, 1998
End Date: March 18, 1998
Distribution Limits
Public
Copyright
Other

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