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Kushiro Group

Matsui et al. (1987) defined Kushiro Group sensu stricto composed of Toro Formation, Takkobu Formation and Toya Formation but it was redefined as Kushiro Formation by Hasegawa et al. (2011).

• Type locality: Kushiro wetland, Hokkaido
• Coherent formation
• Pliocene - Pleistocene

• Sedimentary facies: Marine
• Depth of water: Shallow

• Upper limit: Unconformity (Kussharo Tephra)

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

• Distribution: Kushiro wetland, Hokkaido

• Hasegawa et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.12, pp.686-699 DOI