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Mizuyagadani Formation Igo, 1956
- Type locality: Mizuyagadani valley, Osobudani valley, Fukuji, Okuhidaonsengo, Takayama city, Gifu prefecture
- Coherent formation
- Permian, Asselian - Sakmarian (Fusulinids)
- Lithofacies: Limestone, Interbedded sandstone and mudstone, Conglomerate
- Lithofacies (Minor): Mafic tuff, Calcareous mudstone, Sandstone, Calcareous sandstone
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mizuyagadani valley - Takatani valley - Mizuboradani valley, Osobudani valley, Fukuji, Okuhidaonsengo, Takayama city, Gifu pref.
- Fossils: Cephalopods (Michelinoceratine nautiolids), Brachiopods, Bivalves, Gastropods, Corals, Crinoids, Fusulinids, Calcareous algae, Sponges, Foraminifera, Radiolarians (Pseudoalbaillella lomentaria)
- Tazawa et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.3, pp.127-133 DOI
- Harayama (1990) Geology of the Kamikochi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 175p. (in Japanese with English abstract 11p.)