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Geology of the conterminous United States
A digital version of the Geologic Map of the United States, originally published at a scale of 1:2,500,000 (King and Beikman, 1974b). It excludes Alaska and Hawaii. |
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Geology and resource assessment of Costa Rica
Geologic map at 1:500,000 scale, digitized from USGS I-1865. Includes mines, prospects, and occurrences, permissive tracts for several mineral deposit types, and gravity anomaly contours. |
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Geology and resource assessment of Costa Rica at 1:500,000 scale; a digital representation of maps of the U.S. Geological Survey's 1987 folio I-1865
Geologic units, structural features, geochemical sample points, and detailed information about the Tilaran gold mining area. |
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Geology and resource assessment of the Venezuelan Guayana Shield at 1:500,000 scale
Mineral resource assessment of the Venezuelan Guayana Shield, including geologic unit map |
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Preliminary Metallogenic Map of North America; a listing of deposits by commodity
The 4,215 ore deposits shown on the Preliminary Metallogenic Map of North America and contained in the Metallogenic Map file have been sorted by their principal (first-listed) commodities and grouped into metallic and nonmetallic categories. Deposit listi |
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| Geologic map of the Río Caura 2 degree x 3 degree Quadrangle, Estado Bolívar and Estado Amazonas, Venezuela | Info |