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Mashu volcano

• Type locality: Hokkaido
• Volcanic rocks
• Pleistocene - Holocene

• Sedimentary facies: Terrestrial

• Summit caldera: 7.5 x 5.5 km²
• Upper limit: Ground surface
• Lower limit: Unconformity

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

• Distribution: Hokkaido

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