A proposed origin for palimpsests and anomalous pit craters on Ganymede and Callisto.

Details A proposed origin for palimpsests and anomalous pit craters on Ganymede and Callisto. A proposed origin for palimpsests and anomalous pit craters on Ganymede and Callisto.

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88...71c&link_type=abstract

Journal of Geophysical Research, Vol. 88, Suppl., p. B71 - B89

Physics

30

Callisto Craters:Origin, Ganymede Craters:Origin

Scientific paper

Palimpsests and anomalous pit craters are two classes of craters found on the icy satellites Ganymede and Callisto that have no obvious counterparts among the crater populations found on rocky planets. In this paper, the hypothesis that palimpsests and anomalous pit craters are essentially pristine crater forms derived from high-velocity impacts and/or impacts into an ice crust with preimpact temperatures near melting is explored. The observational data are first briefly reviewed, then the impact model is described, and finally the calculated predictions of the model for a range of physically probable input parameters are compared with the observational data.

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