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Ohchi Formation Kawamura, 2010

Invalid synonym: Utano Formation (Takahashi et al., 1965), Kiyosue Formation, Nakao Siltstone Member, a part of Nanami Sandstone Member

• Type locality: Nakao, Ochi, Shimonoseki city, Yamaguchi prefecture
• Coherent formation
• Middle Jurassic, Bathonian - Callovian (Plants)

• Sedimentary facies: Marine
• Sedimentary facies: Inner bay

• Thickness: 300 - 570 m

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

• Distribution: Nakao, Ochi, Shimonoseki city, Yamaguchi pref.; Kamitabe - Ono, Shimonoseki city, Yamaguchi pref.; Mount Ongasa - Takaji pass, Shimonoseki city, Yamaguchi pref.; Nanami - Yoshika, Kikukawa village, Shimonoseki city, Yamaguchi pref.

• Kawamura (2010) Jour. Geol. Soc. Japan, vol.116, no.1, pp.27-44 DOI