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Asahidake Upper Pyroclastic Rock and Lava Ishige and Nakagawa, 2017

Abbr. AU

• Type locality: 2,100 m above sea level, East foot, Mount Asahidake, Mount Taisetsu, Hokkaido
• Volcanic rocks
• Pleistocene (ca. 7.5 ka - ?)

• Sedimentary facies (Upper): Pyroclastic fall deposit
• Sedimentary facies (Lower): Phreatic eruption deposit
• Lithofacies (Upper): Volcanic breccia composed of pumice and scoria
• Lithofacies (Lower): Tuff
• Lithofacies (Scoria): Olivine-bearing clinopyroxene-orthopyroxene basaltic andesite - andesite
• Lithofacies (Pumice): Clinopyroxene-orthopyroxene basaltic andesite - dacite

• Eruptive volume: < 0.01 km³ DRE
• Thickness: 1 m
• Upper limit: Unconformity
• Lower limit: Unconformity

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

• Distribution: Upper part of pyroclastic cone and Jigoku valley explosion crater, Mount Asahidake, Mount Taisetsu, Hokkaido

• Ishige and Nakagawa (2017) Jour. Geol. Soc. Japan, vol.123, no.2, pp.73-91, DOI