Styles of crater gradation in Southern Ismenius Lacus, Mars: Clues from Meteor Crater, Arizona

Details Styles of crater gradation in Southern Ismenius Lacus, Mars: Clues from Meteor Crater, Arizona Styles of crater gradation in Southern Ismenius Lacus, Mars: Clues from Meteor Crater, Arizona

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992msat.work...61g&link_type=abstract

In Lunar and Planetary Inst., Workshop on the Martian Surface and Atmosphere Through Time p 61-62 (SEE N92-28988 19-91)

Mathematics

Logic

Cratering, Mars Craters, Mars Surface, Meteorite Craters, Meteoritic Damage, Morphology, Planetary Evolution, Geological Surveys, Hypervelocity Impact, Impact Damage, Landforms

Scientific paper

Impact craters on the Earth and Mars provide a unique opportunity to quantify the gradational evolution of instantaneously created landforms in a variety of geologic settings. Unlike most landforms, the initial morphology associated with impact craters on both planets is uncomplicated by competition between construction and degradation during formation. Furthermore, pristine morphologies are both well-constrained and similar to a first order. The present study compares styles of graduation at Meteor Crater with those around selected craters (greater than 1-2 km in diameter) in southern Ismenius Lacus. Emphasis is placed on features visible in images near LANDSAT TM resolution (30-50 m/pixel) which is available for both areas. In contrast to Mars, vegetation on the Earth can modify gradation, but appears to influence overall rates and styles by 2X-3X rather than orders of magnitude. Further studies of additional craters in differing settings will refine the effects of this and other factors (e.g., substrate). Finally, by analogy with results from other terrestrial gradational surfaces this study should help provide constraints on climate over crater histories.

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