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The Geologic Atlas of the United States
The Geologic Atlas of the United States is a set of 227 folios published by the U.S. Geological Survey between 1894 and 1945. Each folio includes both topographic and geologic... -
Kentucky 1:24,000 Geologic Map Data
GIS KT map from ArcGIS site: "1:24,000 Geologic Map Data for Kentucky in GeoSCiML. Contains faults, geologic units, and geologic contacts. The data in this package is compatible... -
Database of the Geologic Map of North America
"The Geological Society of America’s (GSA) Geologic Map of North America (Reed and others, 2005; 1:5,000,000) shows the geology of a significantly large area of the Earth,...