Open Directory - Regional: North America: United States: Science and Environment: Geology

See also:

A Tapestry of Time and Terrain - Geologic, topographic, and physiographic province maps of the U.S., from the U.S. Geological Survey.
State Geologic Maps of All 50 States - Collection of electronic versions of bedrock, surficial, and structural maps.

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Last update: Sunday, December 9, 2007 5:02:22 AM EST - edit

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