Ol Doinyo Lengai, aerial view, Tanzania
Ol Donyo Lengai ( m, ft) is a volcano located in Tanzania and is part of the volcanic system of the Great Rift Valley in eastern Africa. Ol Donyo Lengai is unique among volcanoes in that it produces natro-carbonititic lava, an unusual type of carbonatite, whereas most lavas are rich in silicate minerals, the lava of Ol Donyo Lengai is rich in the rare sodium and potassium carbonates, nyerereite and gregoryite. Due to this unusual composition, the lava is erupted at relatively low temperatures (approximately 500-600 degrees Celsius). This temperature is so low that the molten lava appears black in sunlight, rather than having the red glow common to most lavas. It is also much more fluid than silicate lavas. The sodium and potassium carbonate minerals of the lavas formed by Ol Donyo Lengai are unstable at the Earth's surface and susceptible to rapid weathering, quickly turning from black to grey in color. The resulting volcanic landscape is different from any other in the world. The cone-building stage of the volcano ended about 15,000 years ago. by late 1998 lava had begun overflowing the crater rim. Ol Donyo Lengai means “Mountain of God" in the language of the native Maasai people.
Size: 3534px × 5315px
Location: aerial 10000 feet altitude, view from east towards west
Photo credit: © Ulrich Doering / Alamy / Afripics
License: Licensed
Model Released: No
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