Litostratigrafie
Ordovik
| Sandbian | Crow Point formation Crown Point formation (?Sandbian) |
| Darriwil | Day Point formation Chazy formation |
Kambrium
| Kambrium stage 10 | Gorge formation (Paibian – Kambrium stage 10) |
| Jiangshanian | Gorge formation (Paibian – Kambrium stage 10) |
| Paibian | Gorge formation (Paibian – Kambrium stage 10) |