Some Pennsylvanian Rocks
Breathitt Formation - fossiliferous carbonaceous shale with Dithyrocaris phyllocarid crustaceans from the Lower Pennsylvanian of northern Kentucky, USA.
Rhode Island Coal Measures - slightly metamorphosed mudshale with raindrop imprints from the Pennsylvanian of Attleboro, Massachusetts, USA.
Vanport Flint - multicolored chert ("flint") (Desmoinesian, upper Middle Pennsylvanian) from Flint Ridge, Ohio, USA.
Carbondale Formation, Francis Creek Shale Member - fossiliferous concretions from gray shales of the Mazon Creek Lagerstätte (Desmoinesian, upper Middle Pennsylvanian) near Chicago, Illinois, USA.
Top left: Essexella asherae fossil jellyfish. Top center left: Anthracomedusa turnbulli fossil jellyfish. Top center right: Kallidecthes richardsoni fossil shrimp. Top right: Acanthotelson stimpsoni fossil shrimp. Bottom: Bandringa rayi fossil shark.
Buckhorn Asphalt - fossiliferous asphaltic limestone with nacreous nautiloid cephalopod shells (middle Desmoinesian, upper Middle Pennsylvanian) from Buckhorn Asphalt Quarry, Arbuckle Mountains, Oklahoma, USA.
Shelburne Formation - whitish marble, formed by Pennsylvanian metamorphism of Ordovician limestones, from Danby, Vermont, USA.
Allegheny Group - fossiliferous mudshale (Desmoinesian, Middle Pennsylvanian) with carbonized fossil plants from near Nelsonville, Ohio, USA.