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Upper Nasodani Lava

• Stratovolcano
• West Chokai edifice
• Volcanic rocks
• Pleistocene

• Lithofacies: Calc-alkaline
• Lithofacies: Olivine hypersthene augite andesite
• Lithofacies (Minor): Hornblende-bearing hypersthene augite andesite, Hypersthene olivine augite basalt
• Lithofacies: Lava (more than 9 flow units)

• Thickness: 150 m or thicker
• Upper limit: Unconformity (Inakuradake Lava)
• Lower limit: Unconformity (Mitaki Volcanic Rocks, Nasodani Lava, Lower Yabitsudani Lava)

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

• Distribution: Mount Inakura - Uenoyama - Tsukidashi, Nikaho city, Akita pref.

• Nakano and Tsuchiya (1992) Geology of the Chokaisan and Fukura District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 138p. (in Japanese with English abstract 7p.)