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Olkaria volcano

Pumice cones 2434 m / 7,985 ft
Kenya, -0.9°S / 36.29°E
Current status: normal or dormant (1 out of 5) | Reports
Olkaria volcano books
Typical eruption style: unspecified
Olkaria volcano eruptions: 1770 ± 50 yearsNo recent earthquakes
TimeMag. / DepthDistanceLocation

Background:

The Olkaria volcanic complex, located immediately south of Lake Naivasha and west of Longonot volcano, comprises up to 80 individual commenditic and other peralkaline rhyolitic centers. A thick, geochemically diverse basal complex is overlain by a dominantly silicic lava-dome and lava-flow complex constructed within a largely obscurred 11 x 7.5 km wide caldera that formed about 20,000 years ago following the eruption of welded pantelleritic ignimbrites. The youngest known eruption originated from the Ololbutot fissue on the SW side of the complex and produced a 5 cu km lava flow and a pumice flow that has a radiocarbon age of about 180 years. Fumarolic activity occurring at the Njorowa Gorge and at the Orengingnai and Olkaria (Orgaria) pumice cones, and Olkaria is the site of a large 50-80 sq km high-temperature geothermal field.
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Smithsonian / GVP volcano information


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