Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > Geology > by state > North Carolina
|Original map label||Jr|
|Primary rock type||rhyolite|
|Secondary rock type|
|Other rock types|
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Dike or sill)Rhyolite (196 my) - dike, medium to dark gray, phenocrysts of sanidine, anorthoclase, and quartz; commonly with calcite or clay amygdules.
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.
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