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Nitarachi Formation

• Coherent formation
• Forearc basin
• Early Cretaceous (Radiolarians)

• Lithofacies: Tuffaceous siliceous mudstone
• Lithofacies (Minor): Felsic tuff, Volcaniclastic sandstone

• Upper limit: Conformity (Kamiabukasanbezawa Formation, Mitsuishigawa Formation, Tsukenai Formation)
• Lower limit: Conformity

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

• Distribution: Hokkaido

• Ueda (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.137-152 DOI