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BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Pottsville Group
RTVirginia
 Kentucky
 Illinois
 Mississippi
 Ohio
 Pennsylvania
 Alabama
 Maryland
 West Virginia
 Tennessee
 Mary Lee Coal
 Breathitt Formation
 New River Formation
 Pocahontas Formation
 Sharon Conglomerate
SNIncludes Lee Formation, Norton Formation, Gladeville Sandstone, Wise Formation, Harlan Sandstone, Lookout Sandstone, Walden Sandstone, Tumbling Run Formation, Schuylkill Formation, Sharp Mountain Formation. Alabama, S Ohio, S Illinois, S Indiana, Kentucky