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Nu-b (Miyata et al., 1988) Hasegawa et al., 2009

Abbr.: Nu-b

• Type locality: Nakashibetsu city, Shibetsu county, Hokkaido
• Tephra
• Pleistocene
• Correlation: KuSc

• Lithofacies: Scoria
• Lithofacies (Minor): Pumice, Lithic fragments
• Lithofacies (Lower, Minor): Tuff

• Source: Mashu volcano
• Thickness: 20 cm
• Upper limit: Unconformity (Nu-a)
• Lower limit: Unconformity (Nu-c)

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

• Distribution: Izumikawa, Betsukai city, Notsuke county, Hokkaido; Nakashibetsu city, Shibetsu county, Hokkaido

• Hasegawa et al. (2009) Jour. Geol. Soc. Japan, vol.115, no.8, pp.369-390 DOI