At top of map:'Department of the Interior, U.S. Geological Survey. Prepared in cooperation with the Clark County Department of Comprehensive Planning. Water supply paper 2320-A, plate 1.' At bottom of map: ' Base from U.S. Geological Survey, 1:100,000, Boulder City, Ariz.-Nev., Las Vegas, Nev.-Calif., Mesquite Lake, Nev.-Calif., 1978; Lake Mead, Nev.-Ariz., 1979. Geology from Malmberg (1965); Longwell and others (1965); Haynes (1967); Bingler (1977); Bell and Smith (1980); Bell (1981); Matti and Bachhuber (1982); and Matti and Morton (1982a, b); modified by R. W. Plume, 1981.' Shows township and range lines. Scale 1:100,000 (W 115°30´--W 115°00´/N 36°30´--N 36°00´). Series: U.S. Geological Survey water-supply paper2320-A. Originally published as plate 1 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.

58 x 47 cm., on sheet 86 x 81 cm., folded in envelope 30 x 24 cm. Relief shown by contours and spot heights. "Geology mapped in 1961." Includes description of map units, 2 col. cross sections, and quadrangle location map. "Prepared in cooperation with the U. S. Atomic Commission." Original publisher: Interior, Geological Survey, Series: Geologic quadrangle map GQ, Scale: 1:24 000.

58 x 46, on sheet 88 x 84 cm., fold. in envelope 30 x 24 cm. Relief shown by contours and spot heights. "Contour interval 20 feet." "Prepared in cooperation with the U.S. Atomic Energy Commission." Title on envelope: Geologic map of the Oak Spring Quadrangle, Nye County, Nevada. Includes 3 col. cross sections, text, and quadrangle location map. Original publisher: Interior, Geological Survey, Series: Geologic quadrangle map GQ, Scale: 1:24 000.