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Hijirigahana Formation
- Type locality: Hijirigahana - Agewa, Yoneyama town, Kashiwazaki city, Niigata prefecture
- Coherent formation
- Miocene - Pliocene
- Contemporaneous heterotopic facies: lower Takegahana Formation
- Correlation: Shiiya Formation
- Sedimentary facies: Marine
- Sedimentary facies: Turbidite
- Lithofacies: Interbedded sandstone and mudstone
- Lithofacies (Minor): Conglomerate, Tuff
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Hijirigahana - Agewa, Yoneyama town, Kashiwazaki city, Niigata pref.; Harai river, Kashiwazaki city, Niigata pref.
- Fossils (Shellfishes): Anadara amicula, Callista brevisihomata, Luctilimeata sp.
- Fossils (Foraminifera): Cyclammina japonica, Globobulimina auriculata, Haplophragimoides compressa, Haplophragimoides emaciatum, Martinottiella communis, Uvigerina urnula shiiyaensis
- Takeuchi et al. (1996) Geology of the Kakizaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 48p. (in Japanese with English abstract 5p.)