Other
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pggp.rept..104p&link_type=abstract
In NASA. Washington Rept. of Planetary Geol. Program, 1983 p 104-106 (SEE N84-23431 13-91)
Other
Craters, Gravitational Effects, Mariner 10 Space Probe, Mercury (Planet), Density Distribution, Earth (Planet), Geomorphology, Image Processing, Least Squares Method, Mars (Planet), Moon
Scientific paper
Opinions conflict over the role of surface gravity in shaping impact craters on Mercury. One view holds that the effects of g are evident in measurable aspects of crater form; other investigators find little or no evidence for g's geomorphic importance. Ambiguity in the role of g and other variables in cratering on Mercury stems largely from uncertainty in identifying major geomorphic contrasts and the crater sizes at which they occur. One of these, depth/diameter (d/D), undergoes a major change at the transition from simple (bowl shaped) to complex (peaks and terraces) crater interiors. Four least-squares d/D fits for fresh craters on Mercury were attemped. The results are inconsistent. The d/D data that should resolve previous shortcomings is presented. The revised d/D distributions for simple and complex craters, which intersect at a diameter of about 5 km, support the initial thesis that g substantially influences the form of Mercury's craters.
Clow Gary D.
Pike Richard J.
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