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Bogoslof Island description and information

BOGOSLOF LINKS

SAMPLES
LOCATION
FACTS
Official Name: Bogoslof Island
Type:Stratovolcano
Most Recent Activity:July 6, 1992
Seismically Monitored: No
Elevation: 492 ft (150 m)
Latitude: 53.9272° N
Longitude:168.0344° W
Quadrangle:Umnak
CAVW Number:311300
Pronunciation: Sound file
Associated Features:Fire Island
Metcalf Domes
McCulloch Peak
Tahoma Peak
Ship Rock
Castle Rock
Nearby towns:Unalaska 61 mi (98 km) SE
Nikolski 76 mi (123 km) SW
Akutan 93 mi (149 km) NE
Saint George 194 mi (312 km) NW
Anchorage 835 mi (1343 km) NE
DESCRIPTION
Bogoslof Island is the largest of a cluster of small, low-lying islands comprising the emergent summit of a large submarine stratovolcano. This stratovolcano rises about 6000 ft (1800 m) from the Bering Sea floor, but is only about 300 ft (100 m) above sea level at its highest point [1]. Bogoslof volcano is unusual in its location. It is slightly north of the main Aleutian volcanic front, and is interpreted as a back-arc feature. This volcano is frequently altered by both eruptions and erosion, and has undergone dramatic changes in historical time.

There are currently two islands of this volcano above sea level: Fire Island and Bogoslof Island. Fire Island lies about 2000 ft (610 m) northwest of Bogoslof and is a tiny sea stack. The current-day Fire Island is what remains of a volcano dome extruded in 1883. Bogoslof is triangular in shape, and about 1.2 mi (2 km) by 0.5 mi (0.75 km). On the southwest side of Bogoslof are steep-sided twin pinnacles called Castle Rock - this is what remains of a dome erupted in 1796. On the north end of Bogoslof Island is a small, 500 ft (150 m) by 900 ft (275 m) dome that was erupted in 1992. Other domes erupted at Bogoslof, (which has had confirmed eruptions in 1796-1804, 1806-1823, 1883-1895, 1906, 1907, 1909-1910, 1926-1928, and 1992) have been lost to explosions or erosion [2] [3] [1].

REFERENCES CITED
[1]
Geology of Umnak and Bogoslof Islands, Aleutian Islands, Alaska, 1959
citation imageByers, F. M. Jr., 1959, Geology of Umnak and Bogoslof Islands, Aleutian Islands, Alaska: in Investigations of Alaskan volcanoes, U.S. Geological Survey Bulletin B 1028-L, p. 267-369, 5 sheets, scale 1 at 1:63,360, 1 at 1:96,000, and 1 at 1:300,000.
Download PDF full-text PDF : 3.5 MB
Download PDF plate 39 PDF : 2.2 MB
Download PDF plate 40 PDF : 3.9 MB
Download PDF plate 41 PDF : 5.6 MB
Download PDF plate 48 PDF : 85 KB
Download PDF talbe 3 PDF : 149 KB

[2]
Volcanoes of North America: United States and Canada, 1990
Wood, C. A., and Kienle, Juergen, (eds.), 1990, Volcanoes of North America: United States and Canada: New York, Cambridge University Press, 354 p.

[3]
Catalog of the historically active volcanoes of Alaska, 1998
citation imageMiller, T. P., McGimsey, R. G., Richter, D. H., Riehle, J. R., Nye, C. J., Yount, M. E., and Dumoulin, J. A., 1998, Catalog of the historically active volcanoes of Alaska: U.S. Geological Survey Open-File Report OF 98-0582, 104 p.
Download PDF title page PDF : 52
Download PDF intro and TOC PDF : 268 KB
Download PDF eastern part - Wrangell to Ukinrek Maars PDF : 972 KB
Download PDF central part - Chiginagak to Cleveland PDF : 2,463 KB
Download PDF western part - Carlisle to Kiska PDF : 956 KB
Download PDF references PDF : 43 KB

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