Preliminary geologic map of Lunar Orbiter site II-P-2

Site II P-2, on the southern edge of Mare Tranquillitatis, is in an area transitional between mare and terra. Mare or mare-like material predominate; typical upland terrain occurs locally, but is more extensive south and west of the site. A distinctive feature of the site is the exceptional smoothness and low crater density of certain areas. Typical mare occurs only in a small area in the east-central part; elsewhere, the mare is unusually deficient in craters. Also of interest, and possibly indicative of late-stage volcanism, is the large dome in the southern part of the site. Owing to the absence of fresh primary impact craters, the site is relatively free of secondary impact craters.