Map and basin profiles showing thickness of valley-fill deposits, Las Vegas Valley, Nevada, 1981 (color variation)

At top of map: 'Department of the Interior. U.S. Geological Survey. Water supply paper2320-A, plate 5.' 'Prepared in cooperation with the Clark County Department of Comprehensive Planning.' 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); Bell and Smith (1980); Bell (1981) and J. R. Harrill, 1976. Thickness of valley-fill deposits by R.W. Plume, 1981.' Includes three profiles. 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 paper, 2320-A. Originally published as plate 5 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.