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Sanokawa Fan Deposit

• Coherent formation
• middle Pleistocene

• Sedimentary facies: Alluvial fan deposit
• Lithofacies:

• Lower limit: Unconformity (Older Obasute Mudflow Deposit)

• Distribution: Obasute - Mine, Koshoku, Chikuma city, Nagano pref.

• Kato and Akahane (1986) Geology of the Nagano District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 120p. (in Japanese with English abstract 5p.)