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Reinterpretations of the northern Nectaris Basin, part FPhotogeologic analysis was attempted on a strip of Apollo 16 metric photographs; the superior quality and stereographic properties of the photography permitted this reevaluation. Geologic contacts, as redrawn closely resemble those of earlier maps, but some differences resulted because of improved photographic quality and a conscious attempt to test fully the impact hypothesis. All or most of the nonmare material of the region of the northern Nectaris Basin rim can be explained by the formation of impact basins. This interpretation seems strained only for some irregular and clustered craters north of Mare Nectaris and for the southern facies of the Descartes material. If the latter material is shown to have been sampled and to be of impact origin, then extensive hill and crater-forming volcanic material of Imbrian or younger age probably does not exist on the lunar terra.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Wilhelms, D. E.
(Geological Survey Washington, DC, United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1972
Publication Information
Publication: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.
Subject Category
Space Sciences
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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