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Idaira Formaiton
- Coherent formation
- Early Cretaceous Barremian
- Kurosegawa Belt (Shizuoka pref.)
- [ Upper ]
- ?--?--?--?--?-
- Idaira Formation
- ~~~~~~~~~~~~~~
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Shizuoka pref.
- Fossils (Lower, Ammonoids): Crioceratites (Paracrioceras) asiaticum
- Murata and Takahashi (2017) Jour. Geol. Soc. Japan, vol.123, no.8, pp.585-597 DOI
- Terabe and Matsuoka (2009) Jour. Geol. Soc. Japan, vol.115, no.3, pp.130-140 DOI