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Ponsubetsu Formation

• Coherent formation
• Miocene (16.5 - 14.2 Ma, Foraminifera)
• Correlation (Upper): Kawabata Formation, Abetsu Formation, Fureoi Formation, Upper Niniu Formation
• Correlation (Lower): Takinoue Formation, Sakae Formation, Lower Niniu Formation

• Sedimentary facies: Marine, Brackish, Terrestrial
• Sedimentary facies: Inner bay

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

• Distribution: Kabato mountains, Hokkaido

• Okamura et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.4, pp.181-198 DOI
• Fossils: Patinopecten kimurai, Vicarya yokoyamai