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Ko-i Tephra (Katsui et al., 1989) Karisawa et al., 1992

Abbr.: Ko-i

Invalid synonym: Ko-h2

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