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Jusanmairu Sandstone Member

• Coherent formation
• early Oligocene

• Sedimentary facies: Shallow marine
• Sedimentary facies: Regressive deposit
• Depth of water: Shallow (Foraminifera)
• Lithofacies: Interbedded andesitic tuffaceous sandstone and sandy siltstone
• Lithofacies (Minor): Conglomerate
• Sedimentary structures: Slump structures, Paralle stratification, Hummocky cross-stratification

• Thickness: 100 m

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

• Distribution: Yubari river, Momijiyama, Yubari city, Hokkaido

• Takahashi et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.10, pp.565-578 DOI
• Hoyanagi et al. (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.205-215 DOI