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Ushiro-Asahidake Lavas (Konoya, 1968) Ishige and Nakagawa, 2017

Abbr. UD

• Type locality: 2,120 m above sea level, North foot, Mount Ushiro-Asahidake, Mount Taisetsu, Hokkaido
• Volcanic rocks
• Pleistocene

• Sedimentary facies (Upper): Lava dome
• Sedimentary facies (Lower): Lava, Lava dome
• Lithofacies: Orthopyroxene-clinopyroxene andesite - dacite

• Eruptive volume: 0.5 km³ DRE
• Thickness (Upper, Lava dome): 200 m
• Thickness (Lower, Lava dome): 100 m
• Thickness (Lower, Lava): more than 2 sheets of 15 - 20 m lavas
• Upper limit: Unconformity
• Lower limit: Unconformity

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

• Distribution: Summit - South foot, Mount Ushiro-Asahidake, Mount Taisetsu, Hokkaido

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