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Tomiuchibashi Tuff Member (Tanaka, 1960) Hayashi et al., 2011

Abbr.: KY-6

• Type locality: south end of Tomiuchi bridge, Hobetsu Azumi, Mukawa city, Yufutsu county, Hokkaido
• Type locality (redefined by Hayashi et al., 2011): upstream of Porosaru creek, Mukawa city, Yufutsu county, Hokkaido
• Coherent formation
• Yezo forearc basin

• Sedimentary facies: Marine
• Lithofacies (Upper): Tuffaceous mudstone
• Lithofacies (Lower): Tuffaceous sandstone, Turbidite

• Thickness (North): ca. 7 m
• Thickness (South): ca. 30 m
• Lower limit: Conformity (Unit 2)

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

• Distribution: Porosaru creek - Tosano creek, Mukawa city, Yufutsu county, Hokkaido; Saru river, Hiratori city, Saru county, Hokkaido

• Hayashi et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.1, pp.14-34 DOI