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Volcanoes and Lava Flows of the Tibesti Mountains, Chad and Libya – November 26th, 2010

21.3N 16.3E

November 26th, 2010 Category: Image of the day, Mountains, Volcanoes

Chad and Libya - November 9th, 2010

The Tibesti Mountains appear as a large brown area occupying most of this image of northern Chad and part of southern Libya. They are a group of dormant volcanoes forming a mountain range in the central Sahara desert, visible as the tan area to the north and west.

In the center of the mountains, in Chad, is Tarso Voon, a stratovolcano with a summit caldera that is 14 x 18 km large. Ignimbrite deposits surround the caldera to distances of 15–35 km.

The dark brown area to the west is Toussidé (also known as Tarso Toussidé), a potentially active volcano that rises to an elevation of 3265 m above sea level. The octopus-like brown shape is due to lava flows extending down the western flank.

Finally, to the north of Toussidé is Tarso Toh, a volcanic field that fills valleys and plains over an area of 80 km in east-west direction and 20–30 km in north-south direction. It contains 150 scoria cones and two maars.

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