Physics
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.2125.&link_type=abstract
Geophysical Research Letters, Volume 18, Issue 11, p. 2125-2128
Physics
Planetology: Solid Surface Planets: Impact Phenomena (Includes Cratering), Planetology: Solid Surface Planets: Origin And Evolution, Planetology: Solid Surface Planets: Surface Materials And Properties
Scientific paper
Using a simple model of lunar topographic evolution resulting from the formation of impact craters, we try 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 hyposometric 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 hypsometeric curve is roughly equivalent to the number density of craters on the oldest lunar crust, corresponding to about 10-4 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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