Ol Doinyo Eburru

Ol Doinyo Eburru is an active complex of volcanoes in the Great Rift Valley, Kenya to the northwest of Lake Naivasha.

Ol Doinyo Eburru is an active complex of volcanoes in the Great Rift Valley, Kenya to the northwest of Lake Naivasha. It is being exploited for geothermal energy. Eburru is part of a group of volcanoes in the rift that also includes Suswa, Longonot, Olkaria, Elmenteita and Menengai. It is separated from Olkaria volcano to the south by the Akira plains.

The Eburru massif rises to 980 metres (3,220 ft) above the floor of the rift. It developed in three stages. The products of the first stage, in the west, are now mostly buried apart from small pantelleritic lava outcrops. The second stage formed the 19.5 kilometres (12.1 mi) Waterloo Ridge on the eastern side of the massif. These rocks came from a series of pyroclastic eruptions originating in a fault zone. The third stage created craters, small cones, domes and lava flows.

The summit has more than fifty craters with diameters from 200 metres (660 ft) to 1.25 kilometres (4,100 ft). The pumice lapilli and ash beds from these centers covers most of the massif as well as the western shoulder of the rift. The youngest formations are no more than a few hundred years old.

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