Much of the Earth-facing side of the Moon is covered in dark mare material consisting of volcanic basalt rock. Shallow raised wrinkle ridges and many winding sinuous rilles are evident in this photo. In the center is the 14 mile (22km) diameter crater, Krieger. The north-east trending sinuous rilles come from the direction of the Aristarchus plateau just outside the lower portion of the photo. (Apollo 15 Metric camera stereo photo AS2478 & 2479, orbit 70)