Pennsylvanian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
NTBashkirian
 Moscovian
 Gzhelian
 Kasimovian
 Bevier Coal
 Conemaugh Group
 Cumberland Group
 Excello Shale
 Francis Creek Shale
 Freeport Formation
 Herrin Coal Member
 Kittanning Formation
 La Salle Limestone
 Lower Pennsylvanian
 Madera Formation
 Mansfield Formation
 Marble Falls Group
 Mary Lee Coal
 Mattoon Formation
 Middle Pennsylvanian
 Minturn Formation
 Monongahela Group
 Morien Group
 Morrow Formation
 Pittsburgh Coal
 Pottsville Group
 Red Fork Sandstone
 Saginaw Formation
 Sharon Conglomerate
 Smithwick Shale
 Springfield Coal Member
 Strawn Series
 Upper Pennsylvanian
 Wapanucka Limestone
 Watahomigi Formation
 Westerly Granite
RTAlleghany Orogeny
 Amsden Formation
 Bartlesville Sand
 Bird Spring Formation
 Cache Creek Group
 Casper Formation
 Dunkard Group
 Ely Limestone
 Fountain Formation
 Honaker Trail Formation
 Magdalena Group
 Johns Valley Formation
 Maroon Formation
 Minnelusa Formatio