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Show BEAVER CO. AND NEW U. S. BULLETIN I!eaver county wjll take on renewed importance wilh t h3 clrcu li r ion or a bulletin just. issued by the I "iiitr;d States geological survey. The word is that tin; (imparl mcnt has on hand a few copies of Profes- nional Paper Se, on the geology and ore deposits of the San Francisco and adjacent (lis- triets, Utah. Mine workers, consulting engineers and Htu- dents of economic and other branches of geology will find the report of especial Interest both for its text and for the numerous clear-cut and In- ! mructlve Illustrations, which include halftones and line drawings. showing geologic structure, mineral associations, alterations and ore enrichment. ! The valuable minerals In the ; Saa Francisco and adjacent dis- trlcts are described and illus- trated, and their nature, origin and commercial importance are fully discussed. Tho Rollins mine, tho first mine opened in Utah, was In tho San Francisco district. Tills mine produced a fow tons of lead bullion, but tho discovery of the Horn Silver mine in 1S75 brought the San Francisco district into promi- nence and resulted in the oxten- sion of the Utah Southern rail- road to Frisco in 18S0. Not only was the immediate vicinity of Frisco provided with railroad facilities, but Frisco and Mil- ford became distributing cen- ters for a region extending many miles west, south and east. Beaver county, in which the San Francisco district lies, produced from 1SG0 to 1916, gold, silver, copper, lead and zinc valued at $47,211,876. About 70 per cent of this amount represented ore mined in the San Francisco district. The book contains 213 pages, describes the mines of the dis- trict in detail and includes nu- merous plans, sections and dia- grams. Professional Paper 80 will be sent free on application to tho director, United States geological survey, Washington, D. C. |