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Show ORE DEPOSITS IN" UTAH The United States Geological Survey, Sur-vey, Department of the Interior, has on hand a few conies of Professional Paper 80, on the geology and ore deposits de-posits of the San Francisco and ad- jacent districts, Utah. Mine workers, consulting engineers and students of economic and other branches of geology ge-ology will find the report of especial interest, both for its text and for the numerous clear-cut and instructive illustrations, which include halftones half-tones and line drawings, showing geologic structure, mineral associations, associa-tions, alterations, and ore enrichment. enrich-ment. The valuable minerals" in the San Francisco and adjacent districts are described and illustrated, and their nature, origin and commercial importance im-portance are fully discussed. The Rollins mine, the first mine opened in Utah, was in the San Francisco district. This mine produced a few tons of lead bullion, but the discovery discov-ery of the Horn Silver mine in 1875 brought the San Francisco district into prominence and resulted in the extension of the Utah Southern railroad rail-road to Frisco in 1880. Not only was the immedia-te vicinity of Frisco provided with the railroad facilities, but Frisco and Milford became distributing dis-tributing centers for a region extending extend-ing many miles west, south and east. Beaver county, in which the San Francisco district lies produced from 1860 to 1916 gold, silver, copper, lead and zinc valued at $47,211,876. About 70 per cent ofB this amount represented ore mined in the San Francisco district, i The book contains 213 pages, de scribes the mines of the district in detail, and includes numerous plans, sections and diagrams. Professional Paper 80 will be sent free on application appli-cation to the Director, United States Geological Survey, Washington, D.C. |