Toussidé

Toussidé (also known as Tarso Toussidé) is a potentially active stratovolcano in Chad. Toussidé lies in the Tibesti Mountains; the large Yirrigué caldera and the smaller Trou au Natron and Doon Kidimi craters are close to it. It has an elevation of 3,302 m (10,833 ft) above sea level. The volcano is the source of a number of lava flows, which have flowed westward away from Toussidé and east into the Yirrigué caldera.

Trou au Natron, the depression southeast of the volcano, measures approximately 8 by 6 kilometres (5.0 mi × 3.7 mi) in diameter and 700–1,000 metres (2,300–3,300 ft) in depth. During the last glacial maximum or the early-middle Holocene, it was filled with a lake. A number of volcanic cones have developed within Trou au Natron. Fumarolic activity on the peak of Toussidé and geothermal manifestations within Trou au Natron represent signs of volcanic activity at Toussidé.