Uzon (Russian: Узон) is a 9 by 12 km volcanic caldera located in the eastern part of Kamchatka Peninsula, Russia. Together with the Geyzernaya caldera it hosts the largest geothermal field in the Kamchatka Peninsula. The calderas were formed in the mid-Pleistocene in several large eruptions that deposited 20–25 km3 of ignimbrite over a wide area. Lake Dalny fills a Holocene maar in the northeast of Uzon Caldera.

Uzon caldera.jpg
The Uzon and Geyzernaya calderas. Sharp-peaked Kronotsky volcano and flat-topped Krasheninnikov volcano appear in the distance beyond the north caldera rim.
Highest point
Elevation1,617 m (5,305 ft)
Coordinates54°30′N 159°58′E / 54.50°N 159.97°E / 54.50; 159.97
LocationKamchatka, Russia
Mountain typeVolcanic calderas
Last eruption200 ± 300 years

The Uzon Caldera is a location of the occurrence of extremophile micro-organisms due to its high localized temperatures.(C.Michael Hogan. 2010)

See alsoEdit


  • C.Michael Hogan. 2010. Extremophile. eds. E.Monosson and C.Cleveland. Encyclopedia of Earth. National Council for Science and the Environment, Washington DC
  • "Uzon". Global Volcanism Program. Smithsonian Institution.