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Sorachi Group
- Type locality: Sorachi river, Furano city, Hokkaido
- Coherent formation
- Oceanic island arc
- Upper: Forearc basin
- Lower: Ophiolite
- Upper: Early Cretaceous, Berriasian - Barremian
- Lower: Late Jurassic
- Lithofacies (Upper): Tuffaceous siliceous mudstone, Tuff, Volcaniclastic rocks
- Lithofacies (Lower): Tholeiitic greenstones, Basalt
- Lithofacies (Minor): Lava, Dolerite
- Sorachi Group (Yubari-Ashibetsu, Naegawa)
- [ Upper ]
- --------------
- S3
- ~~~~~~~~~~~~~~
- Naegawa Dolerite
- ~~~~~~~~~~~~~~
- S2
- --------------
- S1
- ?--?--?--?--?-
- [ Lower ]
- Sorachi Group (Hidaka)
- [ Upper ]
- --------------
- Chiroro Formation
- ?--?--?--?--?-
- ?
- --------------
- Shirikishimanaigawa Formation
- ?--?--?--?--?-
- [ Lower ]
- Sorachi Group (Harubetsu river, Mitsuishi river, Urakawa)
- [ Upper ]
- --------------
- Nitarachi Formation
- --------------
- Lower part
- ?--?--?--?--?-
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Sorachi river, Furano city, Hokkaido; Horokanai city, Uryu county, Hokkaido; Naegawa river, Nae, Nakafurano city, Sorachi county, Hokkaido; Nae river, Nae, Nakafurano city, Sorachi county, Hokkaido
- Takeshita et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.7, pp.491-515 DOI
- Takashima et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.6, pp.381-398 DOI
- Takahashi et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.6, pp.399-411 DOI
- Tamaki et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.5, pp.207-217 DOI
- Ando et al. (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.185-203 DOI
- Ueda (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.137-152 DOI