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Asahidake Summit Pyroclastic Rock Ishige and Nakagawa, 2017

Abbr. AD

• Type locality: 1,800 m above sea level, Jigoku valley explosion crater, Mount Asahidake, Mount Taisetsu, Hokkaido
• Volcanic rocks
• Pleistocene

• Sedimentary facies: Pyroclastic fall deposit
• Lithofacies (A-6): Lava, Welded dacitic pyroclastic breccia, Welded dacitic volcanic breccia
• Lithofacies: Clinopyroxene-orthopyroxene andesite, Hornblende-bearing clinopyroxene-orthopyroxene dacite

• Source: Saddle between Mount Asahidake and Mount Ushiro-Asahidake
• Eruptive volume: 1.5 km³ DRE
• Thickness (A-3): 120 m
• Upper limit: Unconformity
• Lower limit: Unconformity

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

• Distribution: Summit - West foot, Mount Asahidake, Mount Taisetsu, Hokkaido

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