Coal fields of the conterminous United States - National Coal Resource Assessment updated version

Online link http://pubs.usgs.gov/of/2012/1205/
Description This map sheet with accompanying Geographic Information System (GIS) project is an update of the existing U.S. Geological Survey (USGS) Conterminous U.S. Coal Fields map compiled using data primarily from the USGS National Coal Resource Assessment (NCRA).
Originators East, Joseph A.
Publication U.S. Geological Survey Open-File Report 2012-1205