Adak Quadrangle References Coats, R.R., 1956, Geology of northern Adak Island, Alaska: U.S. Geological Survey Bulletin 1028-C, p. 45-67, 1 plate, scale 1:50,000. Fraser, G.D., and Snyder, G.L., 1959, Geology of southern Adak Island and Kagalaska Island, Alaska: U.S. Geological Survey Bulletin 1028-M, p. 371-408, 2 plates, scale 1:125,000. Kay, S.M., 1983, Metamorphism in the Aleutian arc: The Finger Bay pluton, Adak, Alaska: Canadian Mineralogist, v. 21, p. 665-681. U.S. Geological Survey, 1996, Descriptions of the fields used to report brief descriptions of mines, prospects, and mineral occurrences in Alaska and Hawaii: U.S. Geological Survey Open-file Report 96-79, 5 p.