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Koboke Formation

• High P/T metamorphic rocks
• Protolith: Northern Shimanto Belt
• Deposition: Late Cretaceous (92 Ma or younger, U-Pb)

• Metamorphic facies: Chlorite
• Lithofacies: Psammitic schst
• Lithofacies (Minor): Pelitic schist, Siliceous schist, Conglomeratic schsit

• Upper limit: Oboke Fault
• Lower limit: Thrust fault

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

• Distribution: Oboke valley, Miyoshi city, Tokushima pref.; Iya river, Miyoshi city, Tokushima pref.

• Otoh et al. (2010) Jour. Geol. Soc. Japan, vol.119, No.2, pp.333-346 DOI
• Okamoto et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.37-49 DOI
• Aoki et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.5, pp.171-183 DOI