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Upper Mashu-b Tephra Formation

Abbr.: Ma-b

Synonym: Mashu-b Tuff Bed

• Tephra
• Holocene (1,000 BC)

• Source: Mashu volcano
• Eruptive volume: 4.6 km³

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

• Distribution: Mount Taisetsu, Hokkaido

• Ishige et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.4, pp.297-310 DOI
• Hasegawa et al. (2009) Jour. Geol. Soc. Japan, vol.115, no.8, pp.369-390 DOI