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Ojigahata Formation Miyamura et al., 1976
Invalid synonym: Kurakaketoge Formation
- Type locality: Ojigahata, Taga city, Inukami county, Shiga prefecture
- Type locality: Mount Mikunidake, Shiga prefecture - Gifu prefecture - Mie prefecture
- Accretionary complex
- Jurassic
- Correlation: Kiyotaki Formation
- Sedimentary facies: Marine
- Deposition (Chert): Middle Triassic
- Deposition (Mudstone): Early - Late Jurassic
- Lithofacies: Chert
- Lithofacies (Minor): Slate
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Ojigahata, Taga city, Inukami county, Shiga pref.; Mount Mikunidake, Shiga pref. - Gifu pref. - Mie pref.; Shiori - Kaminyu, Maibara city, Shiga pref.; Mount Amagoitake - Otoge pass, Higashiomi city, Shiga pref.; Mount Fujiwaradake, Inabe city, Mie pref.
- Fossils (Radiolarians): Archaeodictyomitra sp., Archaeospongoprunum japonicum, Archaeospongoprunum cf. spinutosum, Bagatuna? sp., Cryptosteplumnidium cf. carnigerum, Dictyomitrella? sp., Higumastra sp., Hsuum cf. robustum, Parahsuum simplum, Protunuma? sp., Spongocapsula? sp., Stichocapsa sp., Triassocampe cf. annulata, Tricolocapsa cf. conexa, Yeharaia? sp., Zartus? sp.
- Harayama et al. (1989) Geology of the Gozaishoyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 145p. (in Japanese with English abstract 6p.)
- Miyamura et al. (1976) Geology of the Hikonetobu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 49p. (in Japanese with English abstract 6p.)