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Lower Senjogahara Lava

• Stratovolcano
• Volcanic rocks
• Pleistocene

• Lithofacies: Calc-alkaline
• Lithofacies: Hornblende-bearing hypersthene olivine augite andesite
• Lithofacies: Lava (2 flow units)

• Thickness (A unit): 30 m or thicker
• Upper limit (Upper Senjogahara Lava)
• Lower limit: Unconformity (Minaminokomai Lava)

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

• Distribution: Senjogahara, Yuza city, Akumi county, Yamagata 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.)