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Mushikawa Formation
- Accretionary complex, Ophiolite
- middle Permian (Radiolarians)
- Sedimentary facies: Marine
- Lithofacies (Upper): Breccia, Sandstone
- Lithofacies (Lower): Mudstone
- Lithofacies (Lower, Minor): Interbedded sandstone and mudstone
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Itoigawa city, Niigata pref.
- Fossils (Radiolarians): Albaillella asymmetrica, Pseudoalbaillella aff. longicornis, Pseudoalbaillella fusiformis, Pseudoalbaillella longtanensis
- Takeuchi et al. (2010) Jour. Geol. Soc. Japan, vol.116, Supplement, pp.123-142 DOI