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Crater Gradation In Gusev Crater And Meridiani Planum, Mars, J. A. Grant, Raymond E. Arvidson, L. S. Crumpler, Matt P. Golombek, B. Hahn, A. F.C. Haldemann, Rongxing Li, L. A. Soderblom, Steven W. Squyres, S. P. Wright, Wesley Andres Watters
Crater Gradation In Gusev Crater And Meridiani Planum, Mars, J. A. Grant, Raymond E. Arvidson, L. S. Crumpler, Matt P. Golombek, B. Hahn, A. F.C. Haldemann, Rongxing Li, L. A. Soderblom, Steven W. Squyres, S. P. Wright, Wesley Andres Watters
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The Mars Exploration Rovers investigated numerous craters in Gusev crater and Meridiani Planum during the first ∼400 sols of their missions. Craters vary in size and preservation state but are mostly due to secondary impacts at Gusev and primary impacts at Meridiani. Craters at both locations are modified primarily by eolian erosion and infilling and lack evidence for modification by aqueous processes. Effects of gradation on crater form are dependent on size, local lithology, slopes, and availability of mobile sediments. At Gusev, impacts into basaltic rubble create shallow craters and ejecta composed of resistant rocks. Ejecta initially experience eolian stripping, …