2 spots left on Iceland Geo Tour 16-30 July 2022

Oka Plateau volcano

Updated: Jul 3, 2022 18:00 GMT - Refresh
cinder cones 2,077 m / 6,814 ft
Russia, 52.77°N / 98.98°E
Current status: normal or dormant (1 out of 5)

Oka Plateau volcano (also known as the East Sayan volcanic field, East Sayan Volcanic Field, Oka Plateau, Zhom-Bolok, or Jom-Bolok volcano) 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.

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Typical eruption style: effusive, strombolian
Oka Plateau volcano eruptions: 5180 BC
Lastest nearby earthquakes: No recent earthquakes

Background

A postglacial alkalic-basaltic lava flow from the Oka Plateau has a length of 75 km following the Jom-Bolok (Zhom-Bolok) River. The lava flow has young morphology and was dated to have been erupted around 7130 years BP. It 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.


See also: Sentinel hub | Landsat 8 | NASA FIRMS
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