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Younger Debris Flow Deposit Akahane et al., 1992

• Type locality: Mayama, Nakano city - Samusawa, Yamanouchi city, Shimoakai county, Nagano prefecture
• Coherent formation
• Pleistocene (31,700 - 19,350 yBP)

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

• Thickness: 5 - 50 m
• Lower limit: Unconformity

• Distribution: Mayama - Kaesa, Nakano city Nagano pref.; Samusawa - Yokokura - Ryuo, Yamanouchi city, Shimoakai county, Nagano pref.; Hasu, Iiyama city, Nagano pref.; Okura, Tonoyo town, Nagano city, Nagano pref.
• Fossils: Palaeoloxodon naumanni (Molar)

• 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.)