Trou au soda
| Trou au soda | ||
|---|---|---|
 Trou au Natron and Tousside ( south and caldera are up ) |
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| height | 2450 m | |
| location | Chad | |
| Mountains | Tibesti | |
| Coordinates | 20 ° 58 ′ 30 ″ N , 16 ° 34 ′ 16 ″ E | |
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| Type | Caldera | |
The Trou au Natron (also: Doon Orei ) is a caldera in the highest and certainly most remote mountain range in the Sahara , the Tibetan Mountains in Chad . The "Natronloch" owes its name to the large, snow-white shimmering crusts of sodium carbonate that line parts of the caldera. The configuration of the floor plan, which is not circular, indicates a multi-phase crater formation.
Geographical location
The Trou au Natron was created at the southern foot of the 3265 m high Tarso Toussidé and is located in the northwestern part of the Tibesti Mountain Range (volcanic chain), which is closed in the southeast by the highest elevation of the Tibesti Mountains, the 3415 m high, active Emi Koussi . In the lee of the Trou au Natron lies the great sandy desert of Bilma , which belongs to the Ténéré . In the West pull dunes back to the Niger Aïr Mountains . In the north lies the “dead” Tenere du Tufessasset . The impressive Waw an-Namus lies about 500 km north on the northernmost edge of the Tibesti .
Emergence
To date, it is controversial among scientists whether the volcano's caldera is the result of a collapse or a result of pyroclastic activity . The crater has a diameter of nearly eight kilometers and a depth of 950 meters. With its formation, it itself provided the ground for the formation of smaller volcanoes in its crater interior. The former lake, which was up to 500 m deep, was subject to desiccation and drying out until today's salt marshes remained.
literature
- Die Wüsten Afrikas, Michael Martin , Frederking & Thaler, 2nd edition 1999, ISBN 3-89405-382-8
- Eine Fahrt ins Tibesti, Christoph Staewen, Verlag G. Richter, 1st edition 2005, ISBN 3-00-015063-3 (travel report from spring 1964)
Individual evidence
- ↑ Tibesti Mts. ( Memento from July 25, 2008 in the Internet Archive )
- ↑ Marco Stoppato, Alfredo Bini, Linda M. Eklund, Trou au Natron in Deserts p. 144
Web links
- Hans-Joachim Pachur, Norbert Altmann: The Eastern Sahara in the late Quarter (p. 119 f.)
- Tous Side in the Global Volcanism Program of the Smithsonian Institution (English)
- Photogeological evaluation using the example of Trou au Natron