Tanaga (foreground) and Takawangha (middle ground) are stratovolcanoes in the Aleutian arc. Tanaga (elevation: 5,924 feet; 1,806 m) last erupted in 1914, producing lava flows. Tanaga has had three known eruptions since 1763. Takawangha (elevation: 4,795 feet; 1,462 m)is a Holocene volcano and has not erupted in historic time. Takawangha has an ice-filled caldera with minor tephra cones on the flanks, on the rim, , and within the caldera. Photo by R.E. Wilcox, U.S. Geological Survey, September 9, 1952.

Sources of Information:

Coats, R.R., and Marsh, B.D., 1984, Reconnaissance geology of northern Tanaga, Aleutian Islands, Alaska: Geological Society of America Abstracts with Programs, v. 16, p. 474.

Simkin, T., and Siebert, L., 1994, Volcanoes of the World: Geoscience Press, Tucson, Arizona, 349 p.

Wood, C.A., and Kienle, J., 1993, Volcanoes of North America: Cambridge University Press, New York, 354 p.

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Alaska, Aleutian Islands
United States