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The brightly rayed crater Coperincus, one of the most familiar features of the Moon served as the type example of an impact crater in Shoemaker's (1962) classic analysis. This map shows the geology of the crater as interpreted in photographs taken by Lunar Orbiter V. A geologic map at 1:1000000 scale showing the regional setting of Copernicus and the extent of the rim deposits and satellite craters was prepaid from telescopic observations by Schmitt, Trask, and Shoemaker (1967).
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The application of stratigraphic and structural principles to geologic mapping of the moon from telescopic photographs has been discussed by Shoemaker (1962) and Shoemaker and Hackman (1962). Major geologic units are recognized by regional topographic and albedo differences. Pictures returned by Ranger, Surveyor, and Lunar Orbiter spacecraft show that a fragmental regolith, presumably produced by repeated impact and mass wasting, has formed on all but the very youngest of these units. In the Ptolemaeus quadrangle, ages assigned to the rock units are tentative and correlations with the major lunar time stratigraphic units whose type locatlites are in vicinity of Mare Imbrium are uncertian. Materials of each crater...
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