Crater size-shape profiles for the moon and Mercury - Terrain effects and interplanetary comparisons

Details Crater size-shape profiles for the moon and Mercury - Terrain effects and interplanetary comparisons Crater size-shape profiles for the moon and Mercury - Terrain effects and interplanetary comparisons

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978m%26p....19..479s&link_type=abstract

Moon and the Planets, vol. 19, Dec. 1978, p. 479-511.

Astronomy and Astrophysics

Astronomy

5

Lunar Craters, Mercury (Planet), Planetary Craters, Terrain Analysis, Astronomical Catalogs, Diameters, Lunar Far Side, Morphology, Planetology, Shapes, Size (Dimensions)

Scientific paper

Crater size-shape data were compiled for 221 fresh lunar craters and 152 youthful Mercurian craters. Terraces and central peaks develop initially in fresh craters on the moon in the 0-10 km diameter interval. Above a diameter of 65 km all craters are terraced and have central peaks. Swirl floor texture is most common in craters in the size range 20-30 km, but it occurs less frequently as terraces become a dominant feature of crater interiors. For the moon there is a correlation between crater shape and geomorphic terrain type. These crater data suggest that there are significant differences in substrate and/or target properties between maria and highlands. Size-shape profiles for Mercury show that central peak and terrace onset is in the 10-20 km diameter interval; all craters are terraced at 65 km, and all have central peaks at 45 km. The crater data for Mercury show no clearcut terrain correlation. Comparison of lunar and Mercurian data indicates that both central peaks and terraces are more abundant in craters in the diameter range 5-75 km on Mercury. Differences in crater shape between Mercury and the moon may be due to differences in planetary gravitational acceleration.

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