'Department of Interior, U.S. Geological Survey. Water-supply paper 2320-A, plate 3.' 'Prepared in cooperation with the Clark County Department of Comprehensive Planning.' 'Base from U.S. Geological Survey, 1:250,000, Las Vegas and Kingman, 1969.' 'Geology from Malmberg (1965); Longwell and others (1965); and J. R. Harrill, 1976. Lithology by R.W. Plume, 1981.' Contents: Coarse-grained deposits: 0-200 feet below land surface; 200-700 feet below land surface; 700-1,000 feet below land surface -- Fine-grained deposits: 0-200 feet below land surface; 200-700 feet below land surface; 700-1,000 feet below land surface. Scale [ca. 1:316,800. 1 in.=approx. 5 miles]. Series: U.S. Geological Survey water-supply paper 2320-A. Originally published as plate 3 of Ground-water conditions in Las Vegas Valley, Clark County, Nevada. Part I. Hydrogeologic framework / by Russell W. Plume, published by the U.S. Geological Survey in 1989 as Water-supply paper 2320-A.United States Dept. of the Interior, Geological Survey.
Collection consists of an original manuscript, "Geology and Ore-Deposition at Tonopah, Nevada" by Josiah Edward Spurr (1870-1950) with hand-drawn diagrams, and letters discussing the donation of the manuscript. The manuscript, which was published in the journal Economic Geology in 1915, is a geological description of the Tonopah mining area; the Tonopah Mining Company is mentioned frequently. It is undated, but the publication date suggests it was written approximately 1913-1915.