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Ch-d (Miyata et al., 1988) Hasegawa et al., 2009

Abbr.: Ch-d

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

• Lithofacies: Pumice
• Lithofacies (Upper, Minor): Scoria
• Lithofacies (Lower, Ch-d4): Tuff

• Source: Mashu volcano
• Thickness: 60 cm
• Thickness (Ch-d4): 2 cm
• Upper limit: Unconformity (Ch-c)
• Lower limit: Unconformity (Nu-a)

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

• Distribution: Nakashumbetsu, 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