Jebel Uweinat mountains, satellite image. North is at top. This mountain range (peak elevation: 1934 metres) is located on the Egyptian-Sudanese-Libyan border. The area contains prehistoric petroglyphs. Engraved in sandstone, images of giraffes, lions, ostriches, gazelles, and humans date from when the region was wetter and vegetated. The western mountains are intrusive granite, arranged in a ring shape (centre left), while the western slopes include wells, bushes and grass. The eastern areas are sandstone plateaus. The area shown is 40 kilometres across. Image data acquired on 17 March 2012, by the ASTER instrument on NASA's Terra satellite.