Termín
| Severní Amerika | |
| Cincinnatian (Katian – Hirnant) | Gamachian (Hirnant) |
| Richmondian (Katian) | |
| Maysvillian (Katian) | |
| Edenian (Katian) | |
| Mohawkian (Sandbian – Katian) | Chatfieldian (Sandbian – Katian) |
| Turinian (Sandbian) | |
| Whiterockian (Daping – Sandbian) | Chazyan (Darriwil – Sandbian) |
| Rangerian (Daping) | |
| Ibexian (Kambrium stage 10 – Floian) | Blackhillsian (Floian) |
| Tulean (Tremadok – Floian) | |
| Stairsian (Tremadok) | |
| Skullrockian (Kambrium stage 10 – Tremadok) | |