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Upper Mudstone Member

Corresponds to Katsuhira Formaiton of Mitani et al. (1959)

• Coherent formation

• Sedimentary facies: Marine

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

• Distribution: Shiranuka hills, Hokkaido

• Shimada et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.3, pp.207-212 DOI