Litostratigrafie
Devon
Ordovik
Kambrium
| Guzhangian | Avalanche formation |
| Drum | Rockslide formation (?Wuliuan – Drum) |
| Wuliuan | Rockslide formation (?Wuliuan – Drum) |
| Kambrium stage 4 | Sekwi formation |
| Guzhangian | Avalanche formation |
| Drum | Rockslide formation (?Wuliuan – Drum) |
| Wuliuan | Rockslide formation (?Wuliuan – Drum) |
| Kambrium stage 4 | Sekwi formation |