Litostratigrafie
Ordovik: Irkutsk basin, Siberian platform
| Hirnant | Bratsk formation (Sandbian – Hirnant) |
| Katian | Bratsk formation (Sandbian – Hirnant) |
| Sandbian | Bratsk formation (Sandbian – Hirnant) Ancherikovo formation (Darriwil – Sandbian) |
| Darriwil | Ancherikovo formation (Darriwil – Sandbian) Tareevo formation Badaranovo formation (Daping – Darriwil) |
| Daping | Badaranovo formation (Daping – Darriwil) |
| Floian | Iya formation |
| Tremadok | Ust'kut formation |
Ordovik: Ostatní
Kambrium
| Guzhangian | Tangha formation (Drum – Guzhangian) |
| Drum | Kuonamka formation (?Kambrium stage 3 – ?Drum) Tangha formation (Drum – Guzhangian) Ust'mil' formation |
| Wuliuan | Amga formation Kuonamka formation (?Kambrium stage 3 – ?Drum) Nel'gaka formation Udachny formation |
| Kambrium stage 4 | Kuonamka formation (?Kambrium stage 3 – ?Drum) Sinsk formation |
| Kambrium stage 3 | Kuonamka formation (?Kambrium stage 3 – ?Drum) |
| Kambrium stage 2 | Pestrotsvet formation |
Bez zařazení do stupně
Siligir formation (Střední kambrium)