Mathematics – Logic
Scientific paper
Jul 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icar...43....1p&link_type=abstract
Icarus, vol. 43, July 1980, p. 1-19. NASA-supported research.
Mathematics
Logic
27
Impact Damage, Mars Surface, Planetary Craters, Planetology, Ballistics, Explosions, Morphology, Terrestrial Planets, Planets, Satellites, Mars, Impact Craters, Formation, Ejecta, Flow, Morphology, Characteristics, Hypotheses, Depth, Diameter, Gravity, Geometry, Photographs, Data, Earth, Moon, Phobos, Mercury, Planet, Diagrams, Comparisons
Scientific paper
An analysis of the depth vs diameter data of Arthur (1980), is given along with geomorphic data for 73 Martian craters. The implications for the formation of complex impact craters on solid planets is discussed. The analysis integrates detailed morphological observations on planetary craters with geologic data from terrestrial meteorite and explosion craters. The simple to complex transition for impact craters on Mars appears at diameters in the range of 3 to 8 km. Five features appear sequentially with increasing crater size, flat floors, central peaks and shallower depths, scalloped rims, and terraced walls. This order suggests that a shallow depth of excavation and a rebound mechanism have produced the central peaks, not centripetal collapse and deep sliding. Simple craters are relatively uniform in shape from planet to planet, but complex craters vary considerably. Both the average onset diameter for complex impact craters on Mars and the average depth of complex craters vary inversely with gravitational acceleration on four planets.
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