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Shunbetsugawa Formation Ueda, 2007

It had been included in Middle Yezo Group.

• Coherent formation
• Yezo forearc basin
• Early Cretaceous, Albian - Late Cretaceous, Cenomanian (Radiolarians)
• Correlation: Utafue Formation

• Lithofacies: Sandstone, Interbedded sandstone and mudstone, Mudstone

• Upper limit: Conformity (Niikappugawa Formation)
• Lower limit: Unconformity (Kamiabukasanbezawa Formation), Thrust fault (Abukasanbe Mélange)

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

• Distribution: West flank of Hidaka mountains, Hokkaido

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