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Bobrof Volcano

Bobrof

Stratovolcano · United States · 738m

The small 3 x 4 km Bobrof volcanic island lies 50 km W of Adak and 15 km W of Kanaga volcano. The irregular shoreline has a half-dozen small cliff-bound peninsulas. The geology and timing of volcanism on Bobrof are unknown, but pyroclastic flow deposits are present.
The small 3 x 4 km Bobrof volcanic island lies 50 km W of Adak and 15 km W of Kanaga volcano. The irregular shoreline has a half-dozen small cliff-bound peninsulas. The geology and timing of volcanism on Bobrof are unknown, but pyroclastic flow deposits are present. · Photo: Photo courtesy of Alaska Volcano Observatory, U.S. Geological Survey. · Wikimedia Commons
Type
Stratovolcano
Country
United States
Region
North America Volcanic Regions / Aleutian Ridge Volcanic Arc
Elevation
738m
Coordinates
51.910, -177.438
Last eruption
Unknown
Tectonic setting
Subduction zone / Intermediate crust (15-25 km)
Landform
Composite
Major rock type
Basalt / Picro-Basalt
Geological summary

The geology and timing of volcanism on this small uninhabited 3 x 4 km island, located in the Andreanof islands 50 km west of Adak and 15 km west of Kanaga volcano, are unknown (Coats, 1956). Apparent deposits of a massive submarine debris-avalanche deposit extend offshore to the NE. Smith et al. (1978) considered Bobrof to be of possible Holocene age. Andesitic pyroclastic-flow deposits are present on the 738-m-high volcano.

From Wikipedia

Bobrof Island is one of the Andreanof Islands subgroup of the Aleutian Islands in southwestern Alaska, United States. Bobrof Island is a small, uninhabited island about 9 miles (14 km) north and west of Kanaga Island, and 7 miles (11 km) northeast of Cape Sudak on Tanaga Island. Bobrof Island is 2.6 miles (4.2 km) long and 1.8 miles (2.9 km) wide with an area of 3 square miles (7.8 km2), and consists primarily of the 2,421-foot (738 m) high Bobrof Volcano. The volcanic crater, or cone, has been heavily dissected. Underwater deposits adjacent to the island's northeast flank suggest an immense debris-avalanche has taken place.

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Eruption history

Detailed timeline

No eruption records available.

External links

⚠ For reference only. Not for emergency response.