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Hiwasa Formation

• Accretionary complex
• Deposition: Late Cretaceous, Campanian - Maastrichtian (Radiolarians)
• Deposition: Late Cretaceous, Maastrichtian - Paleogene (71.3 - 67.8 Ma, U-Pb)
• Correlation: Oboke Unit, Nonokawa Formation

• Sedimentary facies: Marine
• Lithofacies: Sandstone
• Lithofacies (Minor): Conglomerate, Interbedded sandstone and shale, Shale

• Thickness: ca. 6,000 m
• Lower limit: Minami-Awa Fault

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

• Distribution: Mizoochi, Mugi city, Kaifu county, Tokushima pref.

• Tsujino et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.12, pp.680-685 DOI
• Yamaguchi et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.21-36 DOI
• Kiminami and Toda (2007) Jour. Geol. Soc. Japan, vol.113, no.4, pp.158-167 DOI