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Kushiro Formation

Invalid synonym: Kushiro Group (sensu stricto)

• Type locality: Kushiro city, Kushiro county, Hokkaido
• Coherent formation
• early Pleistocene (1.5 - 1.0 Ma, Tephra)

• Sedimentary facies: Marine

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

• Distribution: Kushiro city - Kushiro wetland, Hokkaido
• Tephra: Ak13, Ak14, Ak15, Ak16, Ak17

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