Geologic map of the Langrenus Quadrangle of the Moon

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 Spumans and other irregular maria in the northeast are part of a belt of such maria concentric with Mare Crisium, which is centered approximately 500 km north of the quadrangle.