Geology and resource assessment of the Venezuelan Guayana Shield at 1:500,000 scale
The data in this CD-ROM are based on a mineral resource assessment of the Venezuelan Guayana Shield, conducted between 1987 and 1991 by the U.S. Geological Survey and Corporacin Venezolana de Guayana, Tcnica Minera, (USGS, 1993). The Venezuelan Shiel |
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Mineral Resource Assessment of the Payette National Forest, West-Central Idaho
Most information was obtained from MRDS (U. S. Geological Survey Mineral Resource Data System). The data was put into GSMODS (a USGS designed database). The data was modified by field examination by the authors. An arc output was generated from GSMODS and |
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