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Bobrof Island

Island in the U.S. state of Alaska

Summary

Island in the U.S. state of Alaska

Field	Value
name	Bobrof Volcano
photo	Bobrof Island and volcano.jpg
photo_caption	Bobrof Island and the volcano
elevation_ft	2421
elevation_ref
location	North Pacific, part of Alaska
range	Aleutian Islands
map	Alaska
map_caption	Alaska
label_position	top
coordinates
coordinates_ref
type	Stratovolcano
age	Holocene
volcanic_arc	Aleutian Arc

|Alaska 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 mi north and west of Kanaga Island, and 7 mi northeast of Cape Sudak on Tanaga Island. Bobrof Island is 2.6 mi long and 1.8 mi wide with an area of 3 sqmi, and consists primarily of the 2421 ft high Bobrof Volcano. Underwater deposits adjacent to the island's northeast flank suggest an immense debris-avalanche has taken place.

Bobrof Volcano

Bobrof Volcano is an inactive stratovolcano which forms the small Bobrof Island. No recorded eruptions have taken place at Bobrof or in its vicinity. It has been considered as Holocene age.

Geography and geology

Because of the inclusion of Alaska, the United States has the largest number of active volcanoes in the world, many of them geologically young. In Alaska, at least 50 volcanoes, including those in the Aleutian archipelago, have erupted in historical time. Alaska accounts for about 80% of the United States' volcanoes, excluding the seamounts in the area, about 8% of the world's volcanoes, and most of these are located among the Aleutian Islands. The Aleutian Islands arc forms the northern boundary of the Pacific Ring of Fire, where tectonic activity generates earthquakes and volcanic eruptions regularly.

The volcano is thought to be of Holocene age. There are lava deposits on the mountain which also suggest activity similar to shield eruptions. No complete publications exist for Bobrof's definite geology, just those with facts and some information.

References

{{cite peakbagger
{{cite gnis
Bergsland, K.. (1994). "Aleut Dictionary". Alaska Native Language Center.
{{cite gvp
Robert R. Coats. (1956). "Reconnaissance geology of some western Aleutian Islands, Alaska: in Investigations of Alaskan volcanoes, U.S. Geological Survey Bulletin B 1028-E". [[United States Geological Survey]].
Ewert, John. (2006). "The National Volcano Early Warning System (NVEWS): U.S. Geological Survey Fact Sheet FS 2006-3142". [[United States Geological Survey]].
(March 2008). "Alaska GeoSurvey News: NL 2008-1". Alaska Division of Geological & Geophysical Surveys.
Myers, J. D.. (1994). "The geology, geochemistry and petrology of the recent magmatic phase of the central and western Aleutian Arc". [[University of Wyoming]].

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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