At head of title: Department of the Interior, United States Geological Survey. As of 01/18/2017, GPO could not validate the distribution status of this title for the FDLP. One folded map in pocket, Plate 1: Geologic and geochemical reconnaissance maps of the Wood Hills and Pequop Mountains, Elko County, Nevada [1962]. Includes bibliographical references (page 20). "Discussion of anomalously high concentrations of zinc, lead, and mercury in the Guilmette Formation and Simonson Dolomite of Devonian age in the Pequop Mountains and Wood Hills."

Geochemical reconnaissance in the Pequop Mountains and Wood Hills has shown that anomalously high concentrations of metals (chiefly zinc, lead, and mercury) occur in the iron-rich fracture-fillings and in small gossan pods in silicified dolomite and limestone. The strongest anomalies are detected in the Pequop Formation and Simonson Dolomite of Devonian age. Small white barite pods were detected in metamorphic rocks in the Wood Hills. The most successful method of geochemical reconnaissance was the analysis of float cobbles and pebbles collected in the major drainages. Conventional stream-sediment sampling and analysis failed to reveal any anomalous metal content except in drainage from the Spruce Mountains mining district at the south end of the Pequop Mountains.