Located midway between Lake Chad and the Gulf of Syrte, this volcanic region called Tibesti is situated in Southern Libya and Northern Chad. This region makes a triangle that measures nearly 350 miles in length and is surrounded by the sandstone plains and plateaus of the central Sahara.
Image taken on 11/16/82 from STS-5 (STS005-41-1344)
Some of the more prominant volcanoes that are located in this region are Yega, Tousside, Oyoye, Tieroko, Voon, Toon, and Emi Koussi.
Information Source:
Shuttle Images at the Johnson Space Center in Houston, Texas.
Images of Volcanoes To VolcanoWorld