This ArcView shapefile contains a polygon representation of the overburden thickness above the uppermost coal in the Deadman coal zone in the southern part (Black Butte area) of the Point of Rocks-Black Butte coalfield, Greater Green River Basin, Wyoming. This shapefile is part of the National Coal Resource Assessment of the Northern Rocky Mountain and Great Plains Fort Union Coal Resources Assessment Area. This shapefile can be shown in relation to other relevant themes of this area. Renamed by USGS staff (original filename: bbovbg)
