Mathematics – Logic
Scientific paper
Jun 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29l..31s&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 12, pp. 31-1, CiteID 1590, DOI 10.1029/2001GL013512
Mathematics
Logic
9
Planetary Sciences: Impact Phenomena (Includes Cratering), Planetology: Solar System Objects: Jovian Satellites
Scientific paper
Continuous ejecta deposits on Ganymede consist of two major units, or facies: a thick inner hummocky pedestal facies, and a relatively thin outer radially scoured facies defined also by the inner limit of the secondary crater field. Both ejecta facies have a well-defined power-law relationship to crater diameter for craters ranging from 15 to ~600 km across. This relationship can be used to estimate the nominal crater diameter for impact features on icy satellites (such as palimpsests and multiring basins) for which the crater rim is no longer recognizable. Ejecta deposits have also been mapped on 4 other icy satellites. Although morphologically similar to eject deposits on the Moon, ejecta deposits for smaller craters are generally significantly broader in extent on the icy satellites, in apparent defiance of predictions of self-similarity. A greater degree of rim collapse and enlargement on the Moon may explain the observed difference.
Ridolfi Francis J.
Schenk Paul M.
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