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1911 Hiedayama Debris Avalanche Deposits

• Coherent formation
• Holocene (August 9th, 1911; April 26th, May 4th, 1912)

• Sedimentary facies: Terrestrial
• Sedimentary facies: Debris avalanche deposit
• Lithofacies: Sands, Gravels

• Thickness: 50 - 100 m
• Running distance: 5 - 6 km
• Volume: 1.5 x 10⁸ km³

• Distribution: Urakawa river - Kanayamzawa creek, Otari city, Kitaazumi city, Nagano pref.

• Nakano et al. (2002) Geology of the Shiroumadake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 105p. (in Japanese with English abstract 5p.)