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ncgeol.kml (Uncompressed, 8.5M)
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https://mrdata.usgs.gov/services/sgmc2 (WMS, version 1.3.0)
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Preliminary integrated geologic map databases for the United States : Alabama, Florida, Georgia, Mississippi, North Carolina, and South Carolina
Detailed report of standardization procedures
Methods used to create several styles for lithology or geologic time
The North Carolina Dept. of Environment, Health, and Natural Resources, Division of Land Resources, NC Geological Survey, in cooperation with the NC Center for Geographic Information and Analysis, 1998, Geology - North Carolina (1:250,000), coverage data file geol250. The data represents the digital equivalent of the official State Geology map (1:500,000 scale), but was digitized from (1:250,000 scale) base maps.
Water polygons that are generated when standard state base map is used.