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Gujo Formation

• Coherent formation
• late Permian (Bivalves)

• Sedimentary facies: Marine
• Lithofacies: Sandstone, Conglomerate, Mudstone

• Thickness: 250 m or thicker
• Upper limit: Unconformity (Yakuno Group, Nabae Group, Fukumoto Group)

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

• Distribution: Gujo, Oe town, Fukuchiyama city, Kyoto pref.
• Fossils: Bryozoans
• Fossils (Gujo fauna): Actinodontophora aff. katsurensis, Allorisma sp., Aviculopecten sp., Bakevellia gujoensis, Bellerophon sp., Bucanopsis sp., Costatoria kobayashii, Neoschizodus permicus, Orthotetina sp., Pleurophorus tenuistriatus, Schellwienella regularis, Schellwienella ruber, Septimyalina sp., Spinomarginifera nipponica

• Takemura et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.123-137 DOI
• Igi and Kuroda (1965) Oeyama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 81p. (in Japanese with English abstract 12p.)