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Nishichirashinai Formation
It had been included in Upper Yezo Group.
- Coherent formation
- Yezo forearc basin
- Late Cretaceous, Coniacian - Santonian
- Upper limit: Conformity
- Lower limit: Conformity
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Teshio-Nakagawa, Hokkaido
- Shimada et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.6, pp.432-436 DOI