Degradation of selected terrestrial and Martian impact craters

Details Degradation of selected terrestrial and Martian impact craters Degradation of selected terrestrial and Martian impact craters

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....9811025g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. E6, p. 11,025-11,042.

Physics

42

Earth Surface, Hypervelocity Impact, Mars Craters, Meteorite Craters, Paleoclimatology, Satellite Imagery, Planetary Meteorology, Thematic Mappers (Landsat), Viking Mars Program, Mars, Impact Craters, Surface, Features, Morphology, Erosion, Earth, Transport, Deposition, Comparison, Eolian Processes, Mass Wasting, Description, Water, Climate, Analysis, Geology, Degredation, Ejecta, Physical Properties, Valleys, Flow, Drainage, Weathering, Deposits, Evolution, Fluvial Features, Valley Networks, Margaritifer S

Scientific paper

The history of degradation of 50,000-yr-old 1.2-km-diam Meteor Crater in Arizona is defined using field mapping, and the degradation states of the progressively more degraded 68,000-yr-old 1.8-km-diam Lonar Crater in Indiana and 0.5-3.0 Myr old 1.75-km-diam Talemzane Crater in Algeria are assessed using air photos. The results on these terrestrial craters are then compared with the gradational morphology associated with craters in southern Ismenius Lacus on Mars, in order to develop first-order constraints on gradational activity. Common degradation signatures associated with craters on both planets are described. These signatures are used to assemble a first-order degradational sequence for the terrestrial craters that is then compared with the Martian degradational signatures to infer past processes and climate.

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