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experimental simulation of impact cratering on icy satellitesCratering processes on icy satellites were simulated in a series of 102 laboratory impact experiments involving a wide range of target materials. For impacts into homogeneous clay slurries with impact energies ranging from five million to ten billion ergs, target yield strengths ranged from 100 to 38 Pa, and apparent viscosities ranged from 8 to 200 Pa s. Bowl-shaped craters, flat-floored craters, central peak craters with high or little relief, and craters with no relief were observed. Crater diameters increased steadily as energies were raised. A similar sequence was seen for experiment in which impact energy was held constant but target viscosity and strength progressively decreases. The experiments suggest that the physical properties of the target media relative to the gravitationally induced stresses determined the final crater morphology. Crater palimpsests could form by prompt collapse of large central peak craters formed in low target strength materials. Ages estimated from crater size-frequency distributions that include these large craters may give values that are too high.
Document ID
19830035018
Document Type
Other - Collected Works
Authors
Greeley, R.
(Arizona State Univ. Tempe, AZ, United States)
Fink, J. H.
(Arizona State University Tempe, AZ, United States)
Gault, D. E.
(Murphys Center for Planetology Murphys, CA, United States)
Guest, J. E.
(London, University Observatory, Mill Hill, Middx., United Kingdom)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Subject Category
LUNAR AND PLANETARY EXPLORATION
Distribution Limits
Public
Copyright
Other