Crater degradation in the Martian highlands: Morphometric analysis of the Sinus Sabaeus region and simulation modeling suggest fluvial processes

Details Crater degradation in the Martian highlands: Morphometric analysis of the Sinus Sabaeus region and simulation modeling suggest fluvial processes Crater degradation in the Martian highlands: Morphometric analysis of the Sinus Sabaeus region and simulation modeling suggest fluvial processes

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgre..10905002f&link_type=abstract

Journal of Geophysical Research, Volume 109, Issue E5, CiteID E05002

Statistics

32

Planetology: Solid Surface Planets: Erosion And Weathering, Planetology: Solid Surface Planets: Impact Phenomena (Includes Cratering), Planetology: Solar System Objects: Mars, Hydrology: Geomorphology (1625), Hydrology: Erosion And Sedimentation

Scientific paper

Results from simulation modeling of crater degradation by fluvial and eolian processes are compared with size-frequency and depth of infilling statistics for the heavily cratered Sinus Sabaeus quadrangle of Mars. The fractional degree of infilling of craters greater than 10 km in diameter in this region is bimodal, with a small population of post-Noachian craters with little infilling, whereas most Noachian craters are strongly infilled. This pattern is most consistent with fluvial erosion of craters, because modeling indicates that craters fill rapidly at first, but the rate of infilling diminishes through time as crater wall heights diminish and the area of deposition on the crater floor increases. Simulated rates of crater infilling by eolian processes are more constant, which would be expected to produce craters equally distributed in degree of infilling, which is not observed. The small slope of the size-frequency distribution in the 10-30 km size range is also consistent with the more rapid fluvial erosion of smaller craters. The analysis also suggests that rates of crater production and of crater degradation were in rough balance during the Noachian epoch in the 10-30 km size range.

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