Terrace width variations in complex Mercurian craters and the transient strength of cratered Mercurian and lunar crust

Details Terrace width variations in complex Mercurian craters and the transient strength of cratered Mercurian and lunar crust Terrace width variations in complex Mercurian craters and the transient strength of cratered Mercurian and lunar crust

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9620923l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Nov. 25, 1991, p. 20,923-20,931.

Physics

4

Craters, Lunar Crust, Mercury Surface, Terraces (Landforms), Depth, Diameters, Lunar Craters, Morphology

Scientific paper

The effective cohesion of the cratered region during crater collapse is determined via the widths of slump terraces of complex craters. Terrace widths are measured for complex craters on Mercury; these generally increase outward toward the rim for a given crater, and the width of the outermost major terrace is generally an increasing function of crater diameter. The terrace widths on Mercury and a gravity-driven slump model are used to estimate the strength of the cratered region immediately after impact (about 1-2 MPa). A comparison with the previous study of lunar complex craters by Pearce and Melosh (1986) indicates that the transient strength of cratered Mercurian crust is no greater than that of the moon. The strength estimates vary only slightly with the geometric model used to restore the outermost major terrace to its precollapse configuration and are consistent with independent strength estimates from the simple-to-complex crater depth/diameter transition.

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