Other
Scientific paper
Dec 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977moon...17..383n&link_type=abstract
The Moon, vol. 17, Dec. 1977, p. 383-393. Research supported by the Deutsche Forschungsgemeinschaft and NASA.
Other
16
Lunar Craters, Lunar Geology, Lunar Maria, Selenology, Apollo 16 Flight, Impact Damage, Lunar Evolution, Lunar Rocks, Magma, Structural Basins
Scientific paper
The crater populations of 18 lunar light plains (Cayley plains) show a variation in relative ages by a factor of about 4 in crater frequency in regions in the surroundings of the Orientale and Imbrium basin, and by a factor of greater than 25 for more distant sites. Thus the idea of a moon-wide synchronism in the emplacement of the lunar light plains with the formation of the basins Imbrium or Orientale cannot be supported. Some light plains are younger than the youngest basin Orientale. Since these plains cannot have been emplaced by any other basin-forming event and local impact-derived origin can certainly be excluded, an endogenic (magmatic) origin is proposed for these plains. Age determination data (DL values) by Soderblom and Lebofsky (1972) and Soderblom and Boyce (1972) are shown to be correlated with own cumulative crater frequency data (N) for surfaces younger than about 3.8 b.y. It is found that DL is proportional to the 0.6 power of N. For ages greater than 3.8 b.y., the DL data by those authors, especially their light plains data, are incompatible with the present crater frequency data.
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