| System | Subsystem/ Series |
Stage | Age (Ma) | |
|---|---|---|---|---|
| Permian | Cisuralian | Asselian | younger | |
| Carboniferous | Pennsylvanian | Gzhelian | 298.9 | 303.7 |
| Kasimovian | 303.7 | 307.0 | ||
| Moscovian | 307.0 | 315.2 | ||
| Bashkirian | 315.2 | 323.2 | ||
| Mississippian | Serpukhovian | 323.2 | 330.9 | |
| Visean | 330.9 | 346.7 | ||
| Tournaisian | 346.7 | 358.9 | ||
| Devonian | Late | Famennian | older | |
| Subdivision of the Carboniferous system according to the ICS, as of 2017.[1] | ||||