(LAC-93) Geologic map of the Mare Humorum region of the moon
The principal feature of the Mare Humorum region is the Humorum basin, a circular mare basin approximately 200 km (kilometer) in diameter . The basin formed early in the history of the moon and was later flooded by mare material. Impact cratering with attendant erosion and aggradation and episod ic volcanism and faulting have occurred in the region . The inferred history of the Humorum basin is similar to that of the Imbrium basin ( S hoemaker and Hackman, 1962; Titley , 1964), but the more subdued topography and the larger density of craters on the rim of the Humorum basin suggest that it is older than the Imbrium basin.
IMAP↗