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Mineral Resources On-Line Spatial Data

Geologic maps of US states

Digital geologic maps of the US states with consistent lithology, age, GIS database structure, and format
Data for the District of Columbia is included with Maryland. Puerto Rico is also available.
Interactive maps
Conterminous US map interface thumbnail image Alaska map interface thumbnail image
Conterminous US Alaska
Conterminous US state geology (Shapefile in ZIP package, 523 megabytes expands to 764 megabytes)
USGS-SGMC.kml KML suitable for use in Google Earth
Colors for the lithology:

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Page Last modified: 15:42 on 15-Oct-2015