|Name||Newark Supergroup, Chatham Group; Chatham Group, Undivided|
|Comments||Printed map has 3 more unit descriptions under TRc, but no individual symbols. They use the same color, but have different PATTERNS. Patterns not used in digital map...all under basic group of TRc. Did NOT include any of the pattern based descriptions.|
|Primary rock type||conglomerate|
|Secondary rock type||sandstone|
|Other rock types||mudstone|
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.
Rhodes, Thomas S., and Conrad, Stephen G., 1985, Geologic Map of North Carolina: Department of Natural Resources and Community Development, Division of Land Resources, and the NC Geological Survey, 1:500,000-scale, compiled by Brown, Philip M., et al, and Parker, John M. III, and in association with the State Geologic Map Advisory Committee.
|Counties||Anson - Chatham - Durham - Granville - Lee - Montgomery - Moore - Orange - Richmond|