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Country: | Russia | |
| Subregion Name: | Kuril Islands | ||
| Volcano Number: | 0900-191 | ||
| Volcano Type: | Somma volcano | ||
| Volcano Status: | Holocene | ||
| Last Known Eruption: | Unknown | ||
| Summit Elevation: | 678 m | 2,224 feet | |
| Latitude: | 47.12°N | 47°7'0"N | |
| Longitude: | 152.25°E | 152°15'0"E | |
| The northernmost of six Quaternary volcanoes on Simushir Island, Urataman consists of an impressive 7.5-km-wide Pleistocene caldera that forms the NE tip of the island. Caldera walls rise 450 m above a 250-m-deep caldera bay. A narrow gap in the northern caldera rim provides sea-water access into the half-moon-shaped Brouton Bay, which fills the NW half of the caldera. A central cone, andesitic Urataman volcano, has grown to a height of 678 m during the Holocene in the SE part of the caldera. Two cinder cones are located along the northern flank of Urataman, and a lava dome was formed on its NW flank along Brouton Bay. No historical eruptions are known from Urataman. | |||
