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Yabu Formation (Sakakura, 1935) Tokuhashi and Endo, 1984

Invalid synonym: Ishizaki Formation, Yokaichiba Formation, Hokota Formation

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