Uratman (russian: Уратман) is a

somma volcano A somma volcano (also known as a sommian) is a volcanic caldera that has been partially filled by a new central cone. The name comes from Mount Somma, a stratovolcano in southern Italy with a summit caldera in which the upper cone of Mount Ves ...

located at the northern end of

Simushir Simushir (russian: Симушир, ja, 新知島, translit=Shimushiru-tō, ain, シムシㇼ, translit=Simusir), meaning ''Large Island'' in Ainu, is an uninhabited volcanic island near the center of the Kuril Islands chain in the Sea of Okho ...

Island,

Kuril Islands The Kuril Islands or Kurile Islands (; rus, Кури́льские острова́, r=Kuril'skiye ostrova, p=kʊˈrʲilʲskʲɪjə ɐstrɐˈva; Japanese: or ) are a volcanic archipelago currently administered as part of Sakhalin Oblast in the ...

, Russia. It overlooks the

Brouton Bay Brouton Bay (, ''bukhta Broutona'') is a bay formed within the volcanic caldera of Urataman volcano at the northern end of Simushir, Simushir Island in the Kuril Islands, Russia. The bay is named for William R. Broughton, William Robert Broughton, ...

which is contained within the crater. The volcano consists of a

Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in ...

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 ...

which contains an

andesite Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predo ...

cone A cone is a three-dimensional geometric shape that tapers smoothly from a flat base (frequently, though not necessarily, circular) to a point called the apex or vertex. A cone is formed by a set of line segments, half-lines, or lines con ...

Holocene The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene togeth ...

age.

References

Simushir Volcanoes of the Kuril Islands Holocene volcanoes Holocene Asia {{SakhalinOblast-geo-stub

See also

References