Ubari Sand Sea, Libya. High dunes in the Ubari Sand Sea. The dunes in the right foreground are more than 200 meters (about 700 feet) high. The village of Gabre Oun and the saline lake seen at the base of the dunes are about 45 kilometers west-northwest of Umn Al Abyad, Libya. October 1956. Figure 10, U.S. Geological Survey Professional Paper 660.
Digital File:ggh00011