Sugarloaf Peak (center), on the southeast coast of Semisopochnoi Island, is the suspected source of lava erupted in 1987. Photo by U.S. Navy. Plate 61 from U.S. Geologic Survey Bulletin 1028-O.
Coats, R.R., 1959, Geologic reconnaissance of Semisopochnoi Island, Western Aleutian Islands: U.S. Geologic Survey Bulletin 1028-O.
DeLong, S.E., Perfit, M.T., McCulloch, M.T., and Ach, J., 1985, Alaska: Journal of Geology, v. 93, p. 609-618.
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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