Geological Survey (U.S.) creator text bibliography dcu Washington U.S. Govt. Print. Off. 1968] 1968 monographic eng

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408 p. illus., maps. 30 cm. A. Geology and beryl deposits of the Peerless pegmatite, Pennington County, South Dakota, by D. M. Sheridan and others.--B. Geology of the Hugo pegmatite, Keystone, South Dakota, by J. J. Norton, L. R. Page, and D. A. Brobst.--C. Exploration for beryllium at the Helen Beryl, Elkhorn and Tin Mountain pegmatites, Custer County, South Dakota, by M. H. Staatz and others.--D. Geology and pegmatites of the Fourmile quadrangle, Black Hills, South Dakota, by J. A. Redden.--E. Geology and mineral deposits of some pegmatites in the southern Black Hills, South Dakota, by J. J. Norton and others.--F. Geology of the Berne quadrangle, Black Hills, South Dakota, by J. A. Redden. Published originally as separate chapters A-F. Includes bibliographies. n-us-sd n-us-wy Pegmatites Geology Black Hills (S.D. and Wyo.) Geology, Stratigraphic Precambrian QE75 .P9 no. 297 gs 67000307 //r883 U.S. Geological Survey. Library 690702 20260227111421.0 gs 67000307