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Shirasu Formation (Hayakawa, 1930) Makimoto and Takeuchi, 1992

Invalid synonym: Ushikubitoge Formation, Ushikubi FOrmation

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