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Shirasawa Formation Iwai, 1949

Invalid synonym: Shirasawa Group, Baba-Shirasawa Group, Ohori Formation, Kitane Formation

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