Surface formation rates and impact crater densities on Venus

Details Surface formation rates and impact crater densities on Venus Surface formation rates and impact crater densities on Venus

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jgr...10421951c&link_type=abstract

Journal of Geophysical Research, Volume 104, Issue E9, p. 21951-21956

Mathematics

Logic

27

Planetology: Solid Surface Planets: Impact Phenomena (Includes Cratering), Planetology: Solar System Objects: Venus

Scientific paper

Impact crater density has been used to estimate relative ages of major Venus geologic units, typically based on the assumption of short, globally synchronous formation periods. The total number density of craters is the only parameter which may be quantified for most Venus subregions, in contrast to the size-frequency analysis often used for other planetary studies. This paper examines the statistical limits on such crater counts and the predicted crater density for various possible time-varying surface formation rate functions. These results show that (1) the true mean crater density is poorly constrained due to the limited sample size provided by aggregate geologic units, and (2) any given crater density can be accommodated by a very short pulse of unit formation at some age T, Gaussian-distributed formation functions of mean age

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