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Senjogahara Scoria Fall Deposit

Invalid synonym: Torinoumi Scoria, Senjogahara Scoria Flow Deposit

• Stratovolcano
• Tephra
• Pleistocene

• Lithofacies: Calc-alkaline
• Lithofacies: Hypersthene olivine augite andesite
• Lithofacies: Scoria fall deposit

• Thickness: ca. 10 m in maximum
• Lower limit: Unconformity (Upper Senjogahara Lava)

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

• Distribution: Lake Chokai - 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.)