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Kankakei Formation
- Volcanic rocks
- Setouchi volcanic belt
- Submarine multiple volcano
- middle Miocene (13.4 - 13.1 Ma, K-Ar, Ar-Ar, FT, U-Pb)
- Lithofacies: Andesite - Basalt
- Lithofacies: Lavas, Pyroclastic rocks, Layered volcanic breccia
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Kankakei valley, Shodoshima island, Kagawa pref.
- Tatsumi et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.12, pp.661-679 DOI
- Tatsumi et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.15-20 DOI