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

Abbr.: Nu-a

• Type locality: Nakashibetsu city, Shibetsu county, Hokkaido
• Tephra
• Pleistocene
• Correlation: WTfl-1

• Lithofacies: Pyroclastic flow deposit
• Lithofacies (Matrix): Tuff
• Lithofacies (Minor): Pumice

• Source: Atosanupuri volcano or Kutcharo volcano
• Thickness: 5 - 10 cm
• Lower limit: Unconformity (LowK-Sc)
• Lower limit: Unconformity (Nu-b)

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

• Distribution: Nakashumbetsu - Izumikawa, Betsukai city, Notsuke county, Hokkaido; Nakashibetsu city, Shibetsu county, Hokkaido; Tokotan, Shibetsu city, Shibetsu county, Hokkaido; Tawadaira, Shibecha city, Kamikawa county, Hokkaido

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