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Nakajima-Osarugawa Tephra

Abbr.: Nj-Os

• Volcanic rocks
• Pleistocene (48 ka)

• Source: Nakajima volcano

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

• Distribution: Ishikari lowland, Hokkaido

• Nakagawa et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.7, pp.473-489 DOI