Martian cratering revisited - Implications for early geologic evolution

Details Martian cratering revisited - Implications for early geologic evolution Martian cratering revisited - Implications for early geologic evolution

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...48...62g&link_type=abstract

Icarus, vol. 48, Oct. 1981, p. 62-75.

Mathematics

Logic

12

Cratering, Distribution Functions, Mars Craters, Monte Carlo Method, Planetary Geology, Viking Lander Spacecraft, Computerized Simulation, Mars Photographs, Mars Surface, Planetary Evolution, Size Distribution, Mars, Cratering, Evolution, Photographs, Comparisons, Craters, Analysis, Statistical Analysis, Density, Size, Diameter, Simulations, Resurfacing, Monte Carlo Methods, Morphology, Models

Scientific paper

Consideration is given to the geological history of Mars as inferred from cratering statistics. The geomorphology of the cratered terrain in Terra Tyrrhena is described in detail, and crater counts made from Viking images of cratered terrain as well as pure cratered areas from the Southern Hemisphere, craters superposing both the intercrater plains and dissected terrain, and plains units in the Northern Hemisphere are presented. Comparison of the Martian crater counts with those obtained for the lunar highlands reveals the distribution functions to be quite similar for crater diameters greater than 8 km, indicating their derivation from the same population of bodies, with an integrated Mars/moon crater flux ratio of at least 0.75. Monte Carlo simulations reveal that if this ratio was due to resurfacing processes, then the Martian population is probably a remnant of obliteration by both inter- and intra-crater plains acting in concert. Results also suggest that most of the endogenetic activity in the cratered terrain occured before the end of heavy bombardment and that two stages of geologic activity were present.

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