Tarso Voon
Encyclopedia
The Tarso Voon is a 3.100 meter high Stratovolcano
Stratovolcano
A stratovolcano, also known as a composite volcano, is a tall, conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic, explosive eruptions...

 in the north of the Republic of Chad
Chad
Chad , officially known as the Republic of Chad, is a landlocked country in Central Africa. It is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon and Nigeria to the southwest, and Niger to the west...

. It is located in the western center of the Tibesti Mountains
Tibesti Mountains
The Tibesti Mountains are a range of inactive volcanoes located on the northern edge of the Chad Basin in the Borkou- and Tibesti Region of northern Chad. The massif is one of the most prominent features of the Central-Sahara desert and covers an area of approximately 100,000 km². The northern...

.

The summit of the mountain is dominated by his 14 x 18 km large and relatively flat Caldera
Caldera
A caldera is a cauldron-like volcanic feature usually formed by the collapse of land following a volcanic eruption, such as the one at Yellowstone National Park in the US. They are sometimes confused with volcanic craters...

. Extensive basaltic flows lie on the northeastern side in a 180-degree arc, its a result of the high activity in the Quaternary period. In his neighborhood in northwestern direction is the Ehi Mosgau located, he is a Stratovulcano with the same evelation, 3.100 meters above the sealevel. Deposits of pyroclastic clouds are found in 15 to 35 km around the caldera. The mountain was constructed over a basement of Precambrian
Precambrian
The Precambrian is the name which describes the large span of time in Earth's history before the current Phanerozoic Eon, and is a Supereon divided into several eons of the geologic time scale...

 Schists.

The well known Soborom Solfataric field is the largest in the Tibesti Mountains, it is located about 5 km in western direction of the summit rim. His active fumaroles, active mud pots and active hot springs are visited by the people of the Tibesti for medical purposes.
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