. . . . . . . . . "The Pennsylvanian Pottsville Formation is a mapped bedrock unit in Pennsylvania, western Maryland, West Virginia, Ohio, and Alabama. It is a major ridge-former in the Ridge-and-Valley Appalachians of the eastern United States. The Pottsville Formation is conspicuous at many sites along the Allegheny Front, the eastern escarpment of the Allegheny or Appalachian Plateau."@en . . . "1092156915"^^ . . . . . "J. P. Lesley, 1876"@en . "Typical Pottsville Formation at Worlds End State Park, Sullivan County, Pennsylvania"@en . . . . . . . . . "The Pennsylvanian Pottsville Formation is a mapped bedrock unit in Pennsylvania, western Maryland, West Virginia, Ohio, and Alabama. It is a major ridge-former in the Ridge-and-Valley Appalachians of the eastern United States. The Pottsville Formation is conspicuous at many sites along the Allegheny Front, the eastern escarpment of the Allegheny or Appalachian Plateau."@en . . . . . . . . "Coldwater Shale, Cuyahoga Formation, Logan Formation, Mauch Chunk Formation, Maxville Limestone, and Parkwood Formation"@en . "Brookville Coal of Allegheny Formation Llewellyn Formation"@en . . . . . . . "sedimentary"@en . . . . . . . "Pottsville Formation"@en . . . "Pottsville Formation"@en . . . . . . . . . "Pennsylvanian"@en . "Alabama, Maryland, Mississippi, Ohio, Pennsylvania, and West Virginia"@en . . . . . . . . . . . . . . . . . . . "see Stratigraphy section"@en . . . . "8682"^^ . . . . . . "16335606"^^ . . . . . . . . . . . . . .