Lewis, R.Q., Nelson, W.H., and Power, J.A., 1960, Geology of Rat Island, Aleutian Islands, Alaska: U.S. Geological Survey Bulletin 1028-Q, p. 555-562, 1 sheet, scale 1:63,360.
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Maps & Other Oversized SheetsBedrock; Bedrock Geology; Generalized; Geology; Volcanic; Volcanic Ash; Volcanoes; Volcanology