Data

Material exposed on the surface of the Moon is heterogeneous. The albedo and other physical characteristics that have been determined with the use of optical and radio telescopes vary from one part of the Moon to another, and the variations are partially correlated with differences in topography. Discontinuities in the areal variation permit the surface material to be divided into map...

The surface of the Moon is heterogeneous. Surface materials are classed on the basis of telescopic observations into map units, each having lateral continuity and a limited range of physiographic characteristics and optical properties (mainly polarization and albedo, the reflectivity under full moon illumination). Such units are analogous to the rock-stratigraphic formations of...

The application of stratigraphic and structural principles to geologic mapping of the Moon from telescopic photographs has been discussed by Shoemaker (1962) and Shoemaker and Hackman (1962). Major geologic units are recognized by regional topographic and albedo differences. Pictures returned by Ranger, Surveyor, and Lunar Orbiter spacecraft show that a fragmental regolith, presumably...

The Sinus Iridum quadrangle includes the northwestern sector of Mare Imbrium, the Sinus Iridum embayment, the arcuate Montes Jura which partly surround Sinus Iridum, and several terra islands in the mare such as the Montes Teneriffe, Montes Recti, and C. Herschel. Mare Imbrium occupies a complex depression or basin consisting of an inner basin and several outer concentric troughs...

The Plato quadrangle in the north-central part of the Moon lies within a series of concentric depressed and raised rings surrounding the Imbrium basin, the center of which lies about 335 km southwest of Montes Teneriffe. The innermost raised ring is marked by isolated ridges and peaks within Mare Imbrium itself, including in the Plato quadrangle Montes Recti and Teneriffe. The band of...

The Cleomedes quadrangle is broadly divisible into three provinces. First, the north half of Mare Crisium dominates the southern part of the area. Second, terra materials occur in concentric bands that alternate with mare or plains forming materials in the northern part. These bands are interrupted by the crater Cleomedes whose associated materials dominate the northwest part of the map...

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...

The Langrenus quadrangle is on the east limb of the lunar nearside, at the southeast margin of Mare Fecunditatis. The crater Langrenus, about 140 km in diameter, is the most prominent feature. Rugged terra materials, scattered by craters of various sizes and ages, occupy much of the east half of the map area, and smooth mare materials in the Fecunditatis basin dominate the west. Mare...

The Purbach quadrangle is in the south central part of the lunar near side and includes the following four distinct topographic geologic provinces: 1) rugged and densely cratered highlands extending north south through the central part of the area locally dissected by large troughs (sculpture) of Imbrium age (Gilbert, 1893; Hartmann, 1963) 2) subdued terrain in the east where both...

The brightly rayed crater Coperincus, one of the most familiar features of the Moon served as the type example of an impact crater in Shoemaker's (1962) classic analysis. This map shows the geology of the crater as interpreted in photographs taken by Lunar Orbiter V. A geologic map at 1:1,000,000 scale showing the regional setting of Copernicus and the extent of the rim deposits and...

The Geminus quadrangle, centrally located in the northeast quadrant of the lunar near side, is dominated geologically by several multiringed circular basins outside the quadrangle and five relatively young, large craters mapped here. The terra and the older craters apparently are mantled by a nearly continuous blanket of ejecta from the Serenitatis, Crisium, Humboldtianum, and Imbrium...

The Cassini quadrangle is in the north-central part of the nearside lunar disk and includes most of the northeast quadrant of Mare Imbrium. Lunar geologic units in the area have been distinguished according to topographic expression, albedo, and infrared stratigraphic relations, and the distribution of each unit is portrayed on the accompanying map. the nature and disposition of geologic...