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Otsukigawa Mudflow Deposit

• Coherent formation
• Sector collapse deposit of Mount Tengudake, Mount Iodake and Mount Inagodake
• Mudflow hills
• Pleistocene

• Lithofacies: Mudflow deposit
• Lithofacies: Breccia
• Lithofacies (Minor): Wood fragments

• Thickness: 50 m or thicker

• Distribution: Honzawa hot spring - Lake Midoriike - Inagoyu hot spring - Otsukigawa river - Lake Matsubara - Komi - Honmagawa - Ashidaira, Komi city, Minamisaku county, Nagnao pref.; Umijiri, Minamimaki city, Minamisaku county, Nagano pref.

• Kawachi (1974) Geology of the Tateshinayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 5p.)