Geology and Ore Deposits of the Summitville District San Juan Mountains Colorado, 1960, United States Geological Survey, Professional Papers, 343

by Thomas A. Steven, James C. Ratte

$75 · Offered by Crossroads Books

Washington: United States Government Printing Office, 1960. burgundy cloth, 11.5" x 9", 70 pages, 5 folded plates inside rear pocket, illustrated. from the abstract, "The Summitvile district, in the eastern San Juan Mountains, Colorado, has produced about $7 1/2 million worth of metals: most of this had been from gold..... More

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