Early Pennsylvanian subepoch - Middle Pennsylvanian subepoch
| International Chronostratigraphic Timescale | Carboniferous Subepochs | |||
|---|---|---|---|---|
| Carboniferous | Pennsylvanian | Gzhelian | Late Pennsylvanian | 298.9 |
| Kasimovian | 303.7 | |||
| Moscovian | Middle Pennsylvanian | 307 | ||
| Bashkirian | Early Pennsylvanian | 315.2 | ||
| Mississippian | Serpukhovian | Late Mississippian | 323.2 | |
| Visean | Middle Mississippian | 330.9 | ||
| Tournaisian | Early Mississippian | 346.7 | ||
| 358.9 | ||||