Pennsylvanian Bibliographic references: International Stratigraphic Chartabsolute age of base: 318100kyerror in absolute age of base: 0%Containing Unit: Carboniferousrank: Epoch/Series status: global Read more about PennsylvanianAdd new comment
Bashkirian Bibliographic references: International Stratigraphic ChartContaining Unit: Lower Pennsylvanianrank: Age/Stage Read more about BashkirianAdd new comment