Ol Doinyo Lengai, panoramic aerial view of the cone, Tanzania
Ol Donyo Lengai 2 960 m 9 711 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 means Mountain of God in the language of the native Maasai people Ol Donyo Lengai is unique among volcanoes in that it produces natrocarbonatite 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 lava The sodium and potassium carbonate minerals of the lava 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 cone building stage of the volcano ended about 15 000 years ago By late 1998 lava had begun overflowing the crater rim The resulting volcanic landscape is different from any other in the world On the far left the extinct vulcano Kerimasi and in the background the cone of Empakai an extinct vulcano of the Ngorongoro crater highlands
Size: 5315px × 3534px
Location: aerial 10000 feet altitude, view from the north,
Photo credit: © Ulrich Doering / Alamy / Afripics
License: Licensed
Model Released: No
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