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Oi Formation (Hirokawa et al., 1957) Ishiga, 1986

UT-2 Sub- belt

• Accretionary complex
• Deposition (Clastic rocks): middle - late Permian (Radiolarians)
• Correlation: Kaibara Formation, Ebara Formation

• Sedimentary facies: Marine
• Lithofacies: Interbedded sandstone and mudstone, Sandstone, Mudstone, Siliceous mudstone
• Lithofacies (Minor): Chert, Felsic tuff

• Thickness: ca. 3,000 m
• Lower limit: Unknown (Hikami Formation)

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

• Distribution: Oi city, Oi county, Fukui pref.

• Takemura et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.2, pp.117-125 DOI
• Sugamori et al. (2012) Jour. Geol. Soc. Japan, vol.118, Supplement, pp.21-36 DOI
• Sugamori and Kametaka (2011) Jour. Geol. Soc. Japan, vol.117, no.11, pp.617-624 DOI
• Sugamori (2009) Jour. Geol. Soc. Japan, vol.115, no.2, pp.80-95 DOI
• Takemura et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.123-137 DOI
• Igi et al. (1961) Maizuru, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 49p. (in Japanese with English abstract 9p.)
• Hirokawa et al. (1958) Obama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 31p. (in Japanese with English abstract 8p.)