Global Volcanism Program | Image GVP-08973
Dark lava flows radiate from Toussidé volcano (center), the second highest peak of the Tibesti Range in Chad. N to the bottom of this Space Shuttle image. It was constructed at the W end of the large Pleistocene caldera of Yirrigue, whose scarp is seen left of Toussidé. The smaller 8-km-wide caldera of Trou au Natron cuts the SE rim of the caldera. Ehi Timi (lower center) and Ehi Sosso (left center) volcanoes are located on the flanks of the massif.
NASA Space Shuttle image S-511-42, 1985 (http://eol.jsc.nasa.gov/).