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Kibi Group

Invalid synonym: Yamajari Formation

• Coherent formation
• Eocene - Oligocene (FT)
• Correlation: Maejima Formation, Namigata Formation, Kobe Group

• Sedimentary facies: Fluvial
• Sedimentary facies: Valley-fill deposit, Depth of valley is 150 m or deeper
• Lithofacies: Clast-supported conglomerate
• Sedimentary structures: Imbricate structures
• Paleocurrent: North to South

• Thickness: 100 m or thinner
• Upper limit: Unconformity (Yagane Formation, Ukan Formation, Nichiôji Formation)
• Lower limit: Unconformity (Nariwa Group)

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

• Distribution: Nika, Kawakami town, Takahashi city, Okayama pref.; Hiwa-Okuguruma - Hata, Soja city, Okayama pref.; Kashiwagi - Takebe, Kibichuo city, Okayama pref.

• Yokota et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.109-122 DOI
• Suzuki et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.139-151 DOI