Physics – Geophysics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept..336h&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 336-337 (SEE N92-10728 01-91)
Physics
Geophysics
Atmospheric Effects, Cratering, Magellan Spacecraft (Nasa), Meteorite Craters, Meteoroids, Venus Atmosphere, Venus Surface, Erosion, Frequency Distribution, Mathematical Models, Size Distribution, Tectonics, Venus (Planet)
Scientific paper
Early results of the Magellan mission to Venus show that almost all of the observed impact craters appear to be unaffected by erosion, burial, and tectonic deformation. Therefore it is reasonable to assume that the observed paucity of small craters in the cumulative size-frequency distribution (SFD) relative to the simple power laws observed on airless planets is most likely due to atmospheric effects on the incoming meteoroids. A model was developed earlier for travel and breakup of a meteoroid in an atmosphere, but this model was never used to estimate a SFD. An attempt is made to match the cumulative SFD and the number and size distribution of multiple-floored craters and crater fields using this model.
Herrick Robert R.
Phillips Roger J.
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