Map Releases

Relative ages of structures and geologic units have been determined from intersection and apparent overlap relations and from morphologic freshness reflecting degree of preservation. The fivefold crater-age sequence is based on the classification of Shoemaker and Hackman (1962), and corresponds broadly to a modified classification of Pohn and Offield (1970) and Offield (1971). Rock units in the qu

The Eudoxus quadrangle is in the northeastern part of the Moon’s nearside hemisphere. It is bordered on the west by Montes Caucasus, which form part of the main rim of the multi-ring Imbrium basin (Hartmann and Kuiper, 1962), and on the south side by Mare Serenitatis, which occupies another large multi-ringed basin. South and east of the prominent crater Eudoxus elevations decrease and the rugged

No abstract available.

The Flamsteed K region is in the southern part of Oceanus Procellarum, approximately 60 km (kilometers) north of the crater Flamsteed and 330 km southwest of the crater Kepler. The region was photographed by Lunar Orbiters I and III; it includes the landing site of Surveyor I and a potential early Apollo landing site. The area is included in a 1:1,000,000-scale map by Marshall (1962). 

The multi-ringed Nectaris basin (Hartmann and Kuiper, 1962) dominates the Fracastorius quadrangle. The basin is 840 km across as measured from the outermost ring and lies athwart four quadrangles. Fracastorius, the southeastern quadrangle, straddles the three rings of the basin (fig. 1). In this quadrangle most pre-Imbrian structures and many depositions were formed by the Nectaris impact. Further

No abstract available.

The Hommel quadrangle is in the southeast highlands of the earthside hemisphere of the Moon. The major geologic units are smooth and ridged terra materials, plains-forming materials, and crater materials. Mare material is absent. In the absence of extensive stratigraphic datum horizons, the geologic units were tentatively correlated with type areas of the lunar geologic system (Shoemaker and Hackm

No abstract available.

No abstract available.

No abstract available.

No abstract available.

No abstract available.