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Niikappugawa Formation (Osanai and Matsushita, 1960) Ueda, 2007
It had been included in Middle Yezo Group.
- Coherent formation
- Yezo forearc basin
- Late Cretaceous, Cenomanian - Turonian (Inoceramus sp.)
- Correlation: Efue Formation
- Lithofacies: Sandstone, Interbedded sandstone and mudstone, Mudstone
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: West flank of Hidaka mountains, Hokkaido
- Ueda (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.137-152 DOI