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Tsuta Debris Avalanche Deposit Takarada and Muraoka, 2004

Invalid synonym: Minamiakakuradake Debris Avalanche Deposit

• Type locality: Tsuta Power Plant, Tsuta river, Towada city, Aomori prefecture
• Pre-caldera volcanoes
• Coherent formation
• Pleistocene (ca. 0.3 - 0.1 Ma)

• Lithofacies: Blocks of debris avalanche, Matrix of debris avalanche

• Source: east side of Mount Akakura
• Distribution: 7 x 10⁶ m²
• Upper limit: Unconformity (Towada Hachinohe Pyroclastic Flow Deposit)
• Lower limit: Unconformity (Hakkoda 1st-stage Pyroclastic Flow Deposit, Hakkoda 2nd-stage Pyroclastic Flow Deposit)

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

• Distribution: Tsuta river, Towada city, Aomori pref.

• Takarada and Muraoka (2004) Geology of the Hakkoda San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 86p. (in Japanese with English abstract 4p.)