Little Sitkin geologic map from USGS Bulletin 1028-H: Snyder, G. L., 1959, Geology of Little Sitkin Island, Alaska: in Investigations of Alaskan volcanoes, U.S. Geological Survey Bulletin B 1028-H, p. 169-210, 1 plate, scale 1:20,000.
Image courtesy of AVO/USGS.
Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image. Full Resolution.