Geologic map of the Oppolzer A region of the Moon Lunar Orbiter Site II P-8, Sinus Medii including Apollo landing sites 3 and 3R
The map shows the regional geology of the Oppolzer A region of the moon, where potential Apollo landing site s 3 and 3R are located. Site 3R includes a prominent mare ridge and is of greater scientific interest (Trask, 1969). The Oppolzer A region is in Sinus Medii , near the center of the lunar earthside hemisphere; it is als o important because surve yor VI successfully landed near the proposed Apollo landing areas. Sinus Med ii is a relatively small, densely cratered mare surrounded by terra plains and sculptured terra ( Wilhelms , 1968). The geology of the region is dominated by a rela tively high density of individual craters and crater clusters. Most of the craters are less than 800 meters in diameter and appear to be of secondary and primary impact origin.