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The Global Volcanism Program has no activity reports for Bobrof.
The Global Volcanism Program has no Weekly Reports available for Bobrof.
The Global Volcanism Program has no Bulletin Reports available for Bobrof.
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.
The Global Volcanism Program is not aware of any Holocene eruptions from Bobrof. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Bobrof page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
The Global Volcanism Program has no synonyms or subfeatures listed for Bobrof.
|The small 3 x 4 km volcanic island of Bobrof lies 50 km west of Adak and 15 km west of Kanaga volcano. The irregular shoreline of the island has a half dozen small cliff-bound peninsulas. A deep valley (center) extends from the summit to the northern coast of the uninhabited island. The geology and timing of volcanism on Bobrof are unknown. Andesitic pyroclastic-flow deposits are present on the 738-m-high volcano.
Photo courtesy of Alaska Volcano Observatory, U.S. Geological Survey.
The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.
Coats R R, 1956c. Reconnaissance geology of some western Aleutian islands, Alaska.. U S Geol Surv Bull, 1028-E: 83-100.
Coombs M L, White S M, Scholl D W, 2007b. Massive edifice failure at Aleutian arc volcanoes. Earth Planet Sci Lett, 256: 403-418.
Henning R A, Rosenthal C H, Olds B, Reading E (eds), 1976. Alaska's volcanoes, northern link in the ring of fire. Alaska Geog, 4: 1-88.
IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..
Kay S M, Kay R W, Citron G P, 1982. Tectonic controls on tholeiitic and calc-alkaline magmatism in the Aleutian arc. J Geophys Res, 87: 4051-4072.
Motyka R J, Liss S A, Nye C J, Moorman M A, 1993. Geothermal resources of the Aleutian arc. Alaska Div Geol Geophys Surv, Prof Rpt, no 114, 17 p and 4 map sheets.
Smith R L, Shaw H R, Luedke R G, Russell S L, 1978. Comprehensive tables giving physical data and thermal energy estimates for young igneous systems of the United States. U S Geol Surv Open-File Rpt, 78-925: 1-25.
Wood C A, Kienle J (eds), 1990. Volcanoes of North America. Cambridge, England: Cambridge Univ Press, 354 p.