OREGON STATE UNIVERSITY
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(image credit: John Sarvis, US Fish & Wildlife Service - 8 July 2004 via WikiCommons)
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Isanotski is a stratovolcano, also known as "Ragged Jack" for its rugged and jagged features, that is located on Unimak Island in the Aleutian island chain. It has not erupted since the 1840's.
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Sources of Information:
Charles A. Wood & Jurgen Kienle, 1990 Volcanoes of North America: United States and Canada, Cambridge University Press, Cambridge, p. 45.