Ahaggar

or Hoggar Mountains

High plateau region, southern Algeria.

Located in the central Sahara, it extends about 970 mi (1,550 km) from north to south and 1,300 mi (2,100 km) from east to west. Its mean elevation is above 3,000 ft (900 m); its highest peak is Mount Tahat (9,573 ft [2,918 m]). The main caravan route to Kano (Nigeria) passes along its western margin.

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▪ plateau, Africa

also spelled  Hoggar,  

      large plateau in the north centre of the Sahara, on the Tropic of Cancer, North Africa. Its height is above 3,000 feet (900 m), culminating in Mount Tahat (9,573 feet [2,918 m]) in southeastern Algeria. The plateau, about 965 miles (1,550 km) north to south and 1,300 miles (2,100 km) east to west, is rocky desert composed of black volcanic (basalt) necks and of flows rising above a pink granite massif. The main caravan route to Kano in northern Nigeria passes along the plateau's western margin through the important oasis town of Tamanrasset, Alg., which is about 1,200 miles (1,900 km) south of Algiers. Natural-gas deposits have been found northwest of the plateau.

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