Geology topics
Publications and source records attributed to John Harris Stewart.
This report publishes a geologic digital spatial database (NVGEO) for the geologic map of Nevada by Stewart and Carlson (1978a) which was originally printed on a single sheet of paper at a scale of 1:500,000 (and later reprinted on two sheets in 1991). The spatial digital database (GIS) provided in this report supersedes earlier digital editions by Turner and Bawiec (1991) and Raines and others (1996).
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Recent geologic mapping by the U.S. Geological Survey of more than 2,500 square miles of a relatively little-studied part of central Nevada has outlined four areas favorable for the discovery of metallic mineral deposits. In these areas, lower Paleozoic carbonate rocks crop out below the Roberts Mountains thrust, a widespread fault in central and north-central Nevada. These areas have a stratigraphic and structural setting similar to that of the areas where large, open-pit gold deposits have been discovered recently at Carlin and Cortez in north-central Nevada.
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