Crater formation and modification on the icy satellites of Uranus and Saturn - Depth/diameter and central peak occurrence

Details Crater formation and modification on the icy satellites of Uranus and Saturn - Depth/diameter and central peak occurrence Crater formation and modification on the icy satellites of Uranus and Saturn - Depth/diameter and central peak occurrence

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.3813s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, April 10, 1989, p. 3813-3832.

Mathematics

Logic

46

Icy Satellites, Planetary Craters, Saturn (Planet), Uranus (Planet), Rocks, Terrestrial Planets, Topography, Voyager Project, Planets, Satellites, Uranus, Saturn, Craters, Cratering, Formation, Icy Bodies, Depth, Diameter, Miranda, Analysis, Composition, Morphology, Rock, Ice, Gravity Effects, Photographs, Procedure, Jupiter, Shape, Photoclinometry, Viscosity, Relaxation

Scientific paper

Fresh crater shapes, in particular crater depth/diameter ratios d/D, have been measured for craters on nine of the icy satellites. Crater depths were determined from photoclinometry plus some shallow measurements. Interior morphology, including rimwall slope, was also examined from photoclinometry profiles. Central peak statistics and the characteristic break in slope of d/D curves were determined in order to estimate the transition diameter from simple to complex craters. Crater morphology and transition diameters on the icy satellites were then compared with crater morphology on the terrestrial rocky planets in order to separate or evaluate the relative importance and similarity of surface gravity and target characteristics in controlling crater formation and modification in icy and rocky targets. Estimates of effective rheologies of the target materials were also obtained based on morphologic changes.

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