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Bisei Formation

• Accretionary complex
• Eocene or earlier (48.8 Ma, or earlier)

• Sedimentary facies: Marine
• Lithofacies: Muddy unit

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

• Distribution: Hidaka mountains, Hokkaido

• Nanayama et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.6, pp.421-438 DOI