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Mainosawa Sandstone Member (Otuka, 1934) Tuzino et al., 2018

Invalid synonym: Mainosawa Sands, Maisawa Sandstone Member of volcanic fragments

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