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Ichinotani Formation (Kamei, 1952) Igo, 1956

• Type locality: 1,180 - 1,290 m above sea level, Ichinotani valley, Osobudani valley, Fukuji, Okuhidaonsengo, Takayama city, Gifu prefecture
• Coherent formation
• Lower: late Carboniferous, Bashkirian (Fusulinids)

• Lithofacies: Limestone
• Lithofacies (Minor): Mudstone, Mafic tuff, Felsic tuff, Calcareous sandstone, Siltstone
• Lithofacies (Lower): Biomicrite

• Thickness: 300 m or thicker

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Ichinotani valley - Ozako - Mizuboradani valley - Kanashirozako - Mizuyagadani valley, Osobudani valley, Fukuji, Okuhidaonsengo, Takayama city, Gifu pref.
• Fossils: Cephalopods (Mooreoceras sp.), Brachiopods (Gigantoproductus sp., Purdonella tschernyschewiformis, Striatifera striata), Calcareous algae, Ostracods, Bryozoans, Conodonts (Idiognathoides sp.)
• Fossils (Corals): Carinophyllum sp., Corwenia sp., Heterocaninia sp., Koninckocarinia sp., Kueichouphyllum sp., Lytvophyllum sp.
• Fossils (Fusulinids): Eostaffella? sp., Millerella aff. marblensis, Ozawainella sp.

• 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.)