Tibesti Mountain Volcanoes, Chad – October 31st, 2008
Here we have a sharp image of the Tibesti Mountains, a group of dormant volcanoes forming a mountain range in the central Sahara desert in the Bourkou-Ennedi-Tibesti Region of northern Chad.
The mountains are the largest and highest range in the Sahara.
The highest peak is Emi Koussi, 3,415 m, visible in the third close-up.
Other summits include Kegueur Terbi (3,376 m), Tarso Taro (3,325 m), in the first close-up, and Soborom (3,100 m).
The active volcano Pic Toussidé (3,265 m), with tentacle-like lava flows running down its sides, is best observed in the second close-up.
While the high peaks themselves are all constituted of volcanic material, the mountains stand on broad uplifted area possibly caused by a mantle plume.
The range has a substantially wetter climate than the arid surrounding desert; annual rainfall is estimated at five inches (12 cm) in some of the highest areas of the mountains.