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Upper pyroclastic flow deposit

• Type locality: 1,240 m above sea level, Iwatsubodani valley, Okuhidaonsengo, Takayama city, Gifu prefecture
• Tephra
• Pleistocene

• Sedimentary facies: Terrestrial
• Sedimentary facies: Pyroclastic flow deposit (more than 6 flow units)
• Lithofacies: Quartz-bearing augite biotite hypersthene hornblende dacite

• Thickness: ca. 100 m
• Upper limit: Unconformity (Odana Lava)
• Lower limit: Conformity (Lower pyroclastic flow deposit, Iwatsuboyama Lava), Unconformity (Sorayama Formation)

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

• Distribution: Iwatsubodani valley, Okuhidaonsengo, Takayama city, Gifu pref.

• Harayama (1990) Geology of the Kamikochi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 175p. (in Japanese with English abstract 11p.)