1972. Geological Survey (U.S.). This map layer portrays the 2000 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was crea... U.S. Geological Survey.
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1996. Geological Survey (U.S.). The USGS Central Region Energy Team assessed the oil and gas resources of the United States. Cell maps for each oil and gas production area were cr... U.S. Geological Survey, Central Region Energy Team.
1973. American Geological Institute, Geological Survey (U.S.), Environmental Systems Research Institute (Redlands, Calif.), National Earthquake Information Center, and National Geophysical Data Center. This datalayer is a point coverage representing earthquake epicenters (1973 through March, 2003). Historical data for this layer were derived from:... American Geological Institute.
2003. United States. National Geospatial-Intelligence Agency, Geological Survey (U.S.), American Geological Institute, and Environmental Systems Research Institute (Redlands, Calif.). This datalayer is a point coverage representing a gazetteer of non-populated place features located between the Greenwich meridian (0 degrees) and ... American Geological Institute.
2003. United States. National Geospatial-Intelligence Agency, Geological Survey (U.S.), American Geological Institute, and Environmental Systems Research Institute (Redlands, Calif.). This datalayer is a point coverage representing a gazetteer of populated place features located between the Greenwich meridian (0 degrees) and 180 ... American Geological Institute.
2003. American Geological Institute, Geological Survey (U.S.), and Environmental Systems Research Institute (Redlands, Calif.). This datalayer is a polygon coverage showing U.S. Geological Survey defined geologic provinces of the World, excluding the United States. It was pu... American Geological Institute.
2000. American Geological Institute, Geological Survey (U.S.), and Environmental Systems Research Institute (Redlands, Calif.). This shapefile includes arcs and polygons that describe U.S. Geological Survey defined geologic provinces of the World. Each province has a set of ... American Geological Institute.
2003. American Geological Institute, Geological Survey (U.S.), and Environmental Systems Research Institute (Redlands, Calif.). This dataset is a polyline coverage representing a 5-degree by 5-degree global latitude and longitude grid, including geographically significant li... American Geological Institute.
1998. Causey, J. Douglas. and Geological Survey (U.S.). This datalayer is a point coverage representing mine and mineral resource occurrence data worldwide (most thoroughly within the U.S.) and was publi... U.S. Geological Survey.
1972. American Geological Institute, Geological Survey (U.S.), and Environmental Systems Research Institute (Redlands, Calif.). This datalayer is a point coverage representing metallic and non-metallic mineral resources worldwide. This data was derived from the Mineral Resou... American Geological Institute.