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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 city, Shodo county, Kagawa pref.

• Noda et al. (2017) Geology of the Kan-onji District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 96p. (in Japanese with English abstract 4p.)
• 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