Physics
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989icar...81..271m&link_type=abstract
Icarus (ISSN 0019-1035), vol. 81, Oct. 1989, p. 271-297. Research supported by the William F. Marlar Foundation.
Physics
16
Callisto, Ganymede, Planetary Craters, Satellite Imagery, Satellite Surfaces, Spatial Distribution, Voyager Project, Jupiter, Satellites, Ganymede, Craters, Density, Age, Terrain, Origin, Distribution, Grooves, Bombardment, Surface, Features, Formation, Maps, Emplacement, Thickness, Procedure, Photographs, Analysis, Deformation, Hypotheses, Stratigraphy, Resurfacing, Deposits
Scientific paper
Alternative models of heliocentric and planetocentric crater-forming bombardments of Ganymede and Callisto are presently tested in view of the crater density and size frequency distribution measurements of several distinct Ganymede terrains. The results obtained are interpreted to indicate that the spatial distributions of most classes of craters on Ganymede, as well as the younger craters of Callisto, are more consistent with heliocentric than planetocentric bombardment. The sequence and type of surface modification on Ganymede were then inferred, with absolute ages being dependent on the assumption of heliocentric bombardment.
Head James W.
Murchie Scott L.
Plescia Jeffrey B.
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