Karymshina is a large volcanic caldera located in the southern
Kamchatka Peninsula
The Kamchatka Peninsula (russian: полуостров Камчатка, Poluostrov Kamchatka, ) is a peninsula in the Russian Far East, with an area of about . The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and w ...
of
Russia
Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eig ...
. It was discovered in 2006 by Vladimir L Leonov and Aleksey N. Rogozin.
[http://www.geothermal-energy.org/pdf/IGAstandard/WGC/2010/1238.pdf ]
Location
Karymshima is located about 50 km SW of
Petropavlovsk-Kamchatsky
Petropavlovsk-Kamchatsky ( rus, Петропавловск-Камчатский, a=Петропавловск-Камчатский.ogg, p=pʲɪtrɐˈpavləfsk kɐmˈtɕatskʲɪj) is a city and the administrative, industrial, scientific, and cultu ...
. Although it is towards the East side of Kamchatka, it is on Kamchatka's watershed, with rivers flowing to both the West and East coast.
Description
Karymshina is a volcanic
caldera
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is ...
. There is little to see on the ground since due to the volcano's great age (1.2-1.5 Million years), it has been eroded and covered by younger lava flows from other volcanoes. The caldera measures about 25 km x 15 km. The highest point is Mount Tolstyi at 1,300 m. In the Northwest of the caldera, there is an uplifted block, indicating an abortive eruption since forming. At present, the caldera floor is dry, but in the past it contained a lake that has left a sandstone layer. There are thermal springs, apparently heated by a large magma chamber that is still warm.
Eruptive History
The earliest known eruption occurred about 1.5 million years ago. Although it is difficult to estimate ejecta volume due to erosion and more recent activity covering this eruptions ejecta, an estimate of ejecta volume has been produced by the discoverers, i.e. ~ 825 cubic km.
After this eruption, an uplifted block formed.
Rhyolite domes have also formed around the rim, about 500-800,000 years ago.
See also
*
List of volcanoes in Russia
This is a list of active and extinct volcanoes in Russia.
European Russia
Kamchatka
Volcanoes of the Kamchatka Peninsula of the northwestern Pacific Ocean and the Russian Far East.
Kuril Islands
Volcanoes of the Kuril Islands
The Kuri ...
*
Volcanoes of Kamchatka
The volcanoes of Kamchatka are a large group of volcanoes situated on the Kamchatka Peninsula, in eastern Russia. The Kamchatka River and the surrounding central side valley are flanked by large volcanic belts containing around 160 volcan ...
References
External links
* {{cite gvp, name=Karymshina, vn=300087, access-date=2021-06-25
Volcanoes of the Kamchatka Peninsula
Calderas of Russia
VEI-7 volcanoes
Pleistocene calderas