58 x 47 cm., on sheet 74 x 81 cm., folded in envelope 30 x 24 cm. Relief shown by contours and spot heights. "Geology mapped in 1984-85." Includes text, bibliography, and location maps. "Prepared in cooperation with the U. S. Deparment of Energy." "Base from U. S. Geological Survey, 1961. Photorevised 1983. 10,0000-foot grid ticks based on Nevada coordinate system, central zone. 1000-meter Universal Transverse Mercator grid ticks, zone 11, shown in blue." Original publisher: U. S. Geological Survey, Series: Miscellaneous investigations series map I, Scale: 1:24 000.