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Owarabi Debris Avalanche Deposit Tsuchiya, 1989

Invalid synonym: Akahage Lava

• Stratovolcano
• Old edifice
• Coherent formation
• Pleistocene

• Lithofacies: Debris avalanche deposit
• Lithofacies: Augite hypersthene andesite blocks, Gravels, Volcanic ash

• Thickness: Some dozen - 120 m
• Lower limit: Unconformity (Jozenji Formation, Kannonji Formation, Maruyama Formation, Tateyama Formation, Kitamata Formation, Kusanagi Formation, Aosawa Formation)

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

• Distribution: Lake Sugo - Kusatsu river - Owarabi - Masuda - Oashizawa - Nikai - Maruyama - Nishinosawa, Sakata city, Yamagata pref.; Gakko river, 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.)
• Tsuchiya (1989) Geology of the Osawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 85p. (in Japanese with English abstract 6p.)