01279cam a22003251 4500 gs 66000259 DLC 20260227111419.0 770928s1966 dcuab b f000 0 eng gs 66000259 (OCoLC)3304013 DLC AzU ISS DLC premarc QE75 .P9 no. 510 I 19.16:510 Smedes, Harry Wynn, 1926- Geology and igneous petrology of the northern Elkhorn Mountains, Jefferson and Broadwater Counties, Montana, by Harry W. Smedes. Washington, U.S. Govt. Print. Off., 1966. v, 116 p. illus. (1 col.), maps (1 col.) 29 cm. Geological Survey professional paper 510 Part of illustrative matter in pocket. "Prepared partly on behalf of the U.S. Atomic Energy Commission." Bibliography: p. 113-116. Geology Montana Elkhorn Mountains. Petrology Montana Elkhorn Mountains. Igneous rocks. U.S. Atomic Energy Commission. Igneous petrology of the northern Elkhorn Mountains, Jefferson and Broadwater Counties, Montana. Geological Survey (U.S.). Professional paper ; 510. 30246 30246