Mathematics – Logic
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.2029p&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Feb. 10, 1985, p. 2029-2037. NASA-supported research.
Mathematics
Logic
35
Cratering, Impact Damage, Satellite Surfaces, Saturn Satellites, Chronology, Diameters, Flux Quantization, Planetary Evolution, Terrain Analysis, Saturn, Satellites, Impacts, Cratering, History, Flux, Density, Data, Observations, Surface, Source, Projectiles, Models, Iapetus, Enceladus, Comparisons, Ages, Dione, Bombardment, Time Scale
Scientific paper
The impact flux history of the Saturn system has been modelled, and absolute ages estimated. The model assumes that the general history of impact flux was similar to that of the inner solar system and that the dominant source of material in the postaccretionary phases was external to the Saturn system. Population I and II craters represent the synheavy and postheavy bombardment periods, respectively. Observed crater densities are representative of the actual ages and do not appear to be saturation-equilibrium surfaces. It is concluded that some of the satellites have geologic histories which extend to about 3.5 b.y. Significant endogenic resurfacing has occurred on several satellite surfaces, which indicates that thermal conditions and material compositions are more complicated than might have been anticipated prior to Voyager encounters.
Boyce Joseph M.
Plescia Jeffrey B.
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