Mathematics – Logic
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984icar...58...74s&link_type=abstract
Icarus (ISSN 0019-1035), vol. 58, April 1984, p. 74-80.
Mathematics
Logic
15
Ganymede, Glaciology, Polar Caps, Satellite Surfaces, Callisto, Craters, Glacial Drift, Jupiter, Satellites, Ganymede, Polar Regions, Polar Caps, Formation, Ice, Water Ice, Thickness, Gardening, Depth, Grooves, Terrain, Comparisons, Geology, History, Voyager Missions, Latitude, Callisto
Scientific paper
It is argued that Ganymede's polar caps are the remnants of a more extensive covering of water ice that formed during a period in which the satellite was geologically active. It is inferred that the initial thickness of this covering was a significant fraction of the gardening depth since the covering formed. This suggests an initial thickness of at least a few meters over heavily cratered regions such as the south polar grooved terrain. The absence of similar polar caps on Callisto apparently reflects the absence of comparable geologic activity in the history of this satellite.
Pilcher Carl B.
Shaya Edward J.
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