Evolution of lunar topography by impact processes

Details Evolution of lunar topography by impact processes Evolution of lunar topography by impact processes

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.2125s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Nov. 1991, p. 2125-2128. Research supported by MOESC.

Astronomy and Astrophysics

Astronomy

1

Hypervelocity Impact, Lunar Craters, Lunar Crust, Lunar Topography, Astronomical Models, Lunar Surface, Size Distribution

Scientific paper

A simple model of lunar topographic evolution resulting from the formation of impact craters is used in an attempt to constrain the total number of impactors striking the moon after the solidification of the lunar crust. The numerical results indicate that the evolution of the moon's hypsometric curve is strongly influenced by the total number of craters and is less affected by their size distribution. It is suggested that the total number of craters necessary to explain the standard deviation of the present hypsometric curve is roughly equivalent to the number density of craters on the oldest lunar crust, corresponding to about 10 exp -4 lunar mass of impactors. This may be the total mass of impactors striking after solidification of the lunar crust, more specifically, after about 4.4 to 4.5 Ga ago when the viscous degradation of craters became ineffective.

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