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Sakae Formation

• Coherent formation
• Foreland basins by collision between northeast Japan island arc and Kuril island arc
• early - middle Miocene (15.9 - 14.9 Ma, Diatoms)
• Correlation: Takinoue Formation, Lower Ponsubetsu Formation, Lower Niniu Formation

• Lithofacies: Sandy siltstone, Sandstone
• Lithofacies (Minor): Scoriaceous sandstone, Scoria tuff, Lapilli tuff
• Lithofacies (Bottom): Siltstone

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

• Distribution: Sakae, Mukawa city, Yufutsu county, Hokkaido
• Fossils (Bottom): Ammonia sp. (Foraminifera)

• Kase et al., (2018) Jour. Geol. Soc. Japan, vol.124, no.8, pp.627-642 DOI
• Okamura et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.4, pp.181-198 DOI