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Older Debris Flow Deposit Akahane et al., 1992

• Type locality: Arafune, Shizuma - Iikoma - Shinden, Iiyama city, Nagano prefecture
• Coherent formation
• middle - late Pleistocene

• Sedimentary facies: Debris flow deposit
• Sedimentary facies (Minor): Mudlfow deposit, Talus deposit
• Lithofacies: Gravels
• Lithofacies (Minor): Mud, Sands

• Thickness: 50 - 60 m
• Lower limit: Unconformity

• Distribution: Shizuma - Horikoshi - Tsuchihashi - Iikoma - Shinden, Iiyama city, Nagano pref.; Kurashita river, Sugakawa - Kanbayashi, Yamanouchi city, Shimotakai county, Nagano pref.

• Akahane et al. (1992) Geology of the Nakano District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 106p. (in Japanese with English abstract 4p.)