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This organization publishes guidebooks on the geology of the Carolinas. Under "Publications" you will find a list of their guidebooks and links to those available online.
This unit of government provides access to geophysical data and information for the US, including earth observations, geomagnetic data, amd marine geology.
Information about minerals, resources, and general geology of the state. The website includes an interactive geological map and links to USGS topographical maps for NC.