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Ikejirigawa Debris Avalanche Deposit (Nojiri-ko Excavation Research Group, 1975) Ishii and Geology Research Group for Nojiri-ko Excavation, 1997

Invalid synonym: Ikejirigawa Mudflow

• Type locality: Rokugatsu, Shinano city, Kamiminochi county, Nagano prefecture
• Coherent formation
• late Pleistocene

• Sedimentary facies: Debris avalanche deposit
• Lithofacies: Sandy volcanic ash, Gravels, Charcoal

• Thickness: 5 m or thicker
• Upper limit: Unconformity (Kannoki Formation)

• Distribution: Rokugatsu - Midorigaoka - Mukaishinden, Shinano city, Kamiminochi county, Nagano pref.

• Nagamori et al. (2003) Geology of the Togakushi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 109p. (in Japanese with English abstract 3p.)