Compositional anomaly of Ganymede and Callisto among the ice satellites as inferred from impact crater morphology |
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| Authors: | Kent D Trego |
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| Institution: | (1) Planetology Research Institute, Scottsdale, Ariz., U.S.A. |
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| Abstract: | Differences in crater morphology between the Jovian and Saturnian-Uranian ice satellites implies a weaker surface strength for Ganymede and Callisto and thus a more concentrated composition of water. This compositional anomaly among the ice satellites is apparently due to a more complete migration of heavy material toward the inner part of the pre-planetary disc of the Jovian system than occurred in the discs of the Saturnian and Uranian systems. |
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