You searched for: Subject Coal Remove constraint Subject: Coal Subject Coalfields Remove constraint Subject: Coalfields Place Massachusetts Remove constraint Place: Massachusetts Place Arkansas Remove constraint Place: Arkansas Data type Polygon Remove constraint Data type: Polygon
2001. Eastern Energy Resource Surveys Team (Geological Survey). This polygon shapefile shows the coal fields of Alaska and the conterminous United States. Most of the material for the conterminous United States ... National Atlas of the United States.