Physics
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.3081s&link_type=abstract
Journal of Geophysical Research, vol. 84, June 10, 1979, p. 3081-3096.
Physics
11
Lunar Craters, Lunar Topography, Morphology, Selenology, Diameters, Failure Modes, Impact Damage, Lunar Evolution, Scale Effect, Moon, Craters, Lunar, Slumping, Vesicles, Models, Crater Wall Slopes, Topography, Meteoroid Impacts, Crater Slumping, Morphology, Terraces, Deposits, Structure, Crater Formations, Ages, Nearside, Deformation
Scientific paper
The role of rim slumping in the formation of terraces on interior crater walls and consequent modifications of the shapes of large lunar impact craters is evaluated. Impact excavation cavities were reconstructed by means of a terrace restoration model for twelve lunar craters ranging in diameter from 19 to 137 km. For craters up to 30 km, reconstructed cavity depths are comparable to or greater than cavity depths extrapolated from nonterraced smaller craters, and in the 30 to 70 km diameter range, the reconstructed cavity depths are significantly greater. For craters larger than 70 km, however, the reconstructed cavity depths are consistently less than those predicted from small crater morphometry, indicating a significant additional contribution from ejecta fallback and basement rebound to the modification of the shape of impact craters greater than 70 km.
Head James W.
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