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Shiroyama Formation

• Type locality: Kushiro city, Hokkaido
• Coherent formation
• middle Pleistocene

• Sedimentary facies: Terrestrial
• Sedimentary facies (Bottom): Fluvial
• Lithofacies (Upper): Pyroclastic flow deposit
• Lithofacies (Middle): Sand, Silt, Gravel
• Lithofacies (Lower): Gravel

• Lower limit: Unconformity (Tokotan Formation)

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

• Distribution: Kushiro city, Hokkaido

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