'Compiled by S.L. Schoff and J.E. Moore.' 'Geology generalized from geologic maps of the Nevada Test Site by Special Projects Branch, U.S. Geological Survey; of Lincoln County by Tschanz and Pampeyan (1961); and of Clark County by Bowyer, Pampeyan, and Longwell (1958).' United States Department of the Interior, Geological Survey. Prepared in cooperation with the U.S. Atomic Energy Commission.' 'TEI-838.' Scale 1:125,000 (W 116°00´--W 116°15´/N 37°15´--N 36°30´). Originally published as figure 1 in Chemistry and movement of ground water, Nevada Test Site / by Stuart L. Schoff and John E. Moore, published by the Geological Survey in 1964 as number 838 of the Trace elements investigations report.