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Underclay below the Bedford Coal (Middle Pennsylvanian; Noland Tunnel's north portal outcrop, Tunnel Hill, Coshocton County, Ohio, USA) 1 (30236490233).jpg - Ser Amantio di Nicolao
Underclay below the Bedford Coal (Middle Pennsylvanian; Noland Tunnel's north portal outcrop, Tunnel Hill, Coshocton County, Ohio, USA) 2 (30835648336).jpg - Ser Amantio di Nicolao
Middle Mercer Clay (Middle Pennsylvanian; Rt. 16 roadcut near Trinway, Ohio, USA) 1 (33097389782).jpg - Ser Amantio di Nicolao
Middle Mercer Clay (Middle Pennsylvanian; Rt. 16 roadcut near Trinway, Ohio, USA) 2 (33097380832).jpg - Ser Amantio di Nicolao
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