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Oka Plateau volcano

cinder cones 2077 m / 6,814 ft
Russia, 52.77°N / 98.98°E
Current status: dormant (1 out of 5) | Reports
Oka Plateau volcano books
Typical eruption style: effusive, strombolian
Oka Plateau volcano eruptions: unknown, less than 10,000 years ago No recent earthquakes
TimeMag. / DepthDistanceLocation
Oka Plateau volcano (also known as the East Sayan volcanic field) is a a group of small basaltic cinder cones and associated lava flows in SE Russia near the border with Mongolia, about 200 km west of Lake Baikal.
Eruptions occurred from several vents of the volcano, including the Kropotkin, Peretolchin, and Strariy cinder cones.

Background:

A postglacial alkalic-basaltic lava flow from the Oka Plateau has a length of 75 km following the Zhom-Bolok River. The flow has young morphology and bends around glacial moraines and fills an erosional valley in an older flow which was dated at 12,000 +/- 4000 yrs BP..
Other young eruptions include the 90-m-high Kropotkin cinder cone and 120-m-high Peretolchin cone. Both produced voluminous lava flows not yet dated. Another Holocene cinder cone, Strariy, is located nearby.
The Oka Plateau is part of the larger East Sayan volcanic region; Holocene activity took also place in the Todzha Basin, which is separated from the Oka Plateau by the Great Sayan Ridge.
(Smithsonian / GVP)


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