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Category:Ordovician_geology_of_Pennsylvania?oldid=670743666
Category:Ordovician_geology_of_Pennsylvania?oldid=670743666
http://en.wikipedia.org/wiki/Category:Ordovician_geology_of_Pennsylvania?oldid=670743666
Ordovician geology of Pennsylvania
wasDerivedFrom
Category:Ordovician_geology_of_Pennsylvania?oldid=670743666
http://en.wikipedia.org/wiki/Category:Ordovician_geology_of_Pennsylvania?oldid=670743666