A feldspathic breccia, NWA 11237’s geochemistry includes a mineral called anorthite; in 1971, astronauts James Irwin and David Scott (Apollo 15) collected what is now known as the Genesis Rock (sample 15415) from Spur crater. Analysis concluded that the rock is make up of anorthosite, which is composed mostly of anorthite. This material is what the lunar highlands, the light colored material on the Moon’s surface, is mostly made of. These highlands are older than the darker plains on the Moon, and hence display more craters. The lunar highlands are also the site where many volcanic lava tube skylights have been found.