1979
DOI: 10.1029/jb084ib06p03081
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The role of rim slumping in the modification of lunar impact craters

Abstract: Wall failure has significantly altered the structure of virtually all large, fresh‐appearing lunar craters. Terrace blocks exposed upon a crater's interior walls are interpreted to be sections of the transient cavity rim that slumped into the cavity during the terminal stages of crater formation. Impact excavation cavities have been reconstructed by restoring the innermost terrace block exposed within a crater to its inferred original position at the cavity rim and accounting for the volume of material that sl… Show more

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Cited by 54 publications
(45 citation statements)
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“…The scale and style of the cavity-modification processes also contribute to the greater visibility of the melt deposits in larger craters. Wall failure in larger craters takes place on a much greater scale; slumping occurs in units that are considerably more coherent and slide into the interior of the crater en mane (e.g., Mackin, 1969;Grieve et al, 1977;Settle and Head, 1979;Melosh, 1989, Chap. 8).…”
Section: Transitional Cratersmentioning
confidence: 99%
“…The scale and style of the cavity-modification processes also contribute to the greater visibility of the melt deposits in larger craters. Wall failure in larger craters takes place on a much greater scale; slumping occurs in units that are considerably more coherent and slide into the interior of the crater en mane (e.g., Mackin, 1969;Grieve et al, 1977;Settle and Head, 1979;Melosh, 1989, Chap. 8).…”
Section: Transitional Cratersmentioning
confidence: 99%
“…The inclination of faults at the surface is normally 60 ° . These fault-surfaces may be equivalents to crater inward dipping headscarps which separate terrace-like features as observed in many extraterrestrial complex craters (Melosh 1977;Settle and Head 1979). The fault inclination reveals information about cohesion and frictional properties of these near surface rocks, which are assumed to be more intact than the underlying ones.…”
Section: Comparisons Between Field Data and The Numerical Modelmentioning
confidence: 99%
“…That is, the inner wall and the raised portion of the outer rim which are rougher on centimeter and meter scales than nearby areas. On the Moon, impact processes result in the net down slope movement of fine, comminuted material and also in the exposure of fresh material on steep slopes; mass wasting may play an important role (Head, 1975;Settle and Head, 1979). We suggest that there is an analogous set of Venusian processes that smooth level terrain while leaving slopes with a rough surface.…”
Section: Venusian and Lunar Surface Processesmentioning
confidence: 99%
“…Settle (1980) has proposed that the thick Venusian atmosphere may entrain crater ejecta such that a significant amount of ejecta falls back in the crater cavity. Settle's studies indicate that for craters which sizes greater than 10 km, half of the primary ejecta falls back on the crater.…”
Section: Venusian and Lunar Surface Processesmentioning
confidence: 99%
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