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Tsurugaike Debris Avalanche Deposit (Iwasaki et al., 1984) Yamamoto, 1999

Invalid synonym: Tsurugaike Dry Avalanche

• Type locality: Lake Tsurugaike, Shimogo city, Minamiaizu county, Fukushima prefecture
• Coherent formation
• Sector collapse of Sanbonyaridake volcano or Kasshiasahidake volcano
• middle Pleistocene (0.3 - 0.2 Ma)

• Lithofacies: Basalt - Andesite breccia

• Thickness: ca. 70 m
• Upper limit: Unconformity (Middle Terrace Deposit)
• Lower limit: Unconformity (Narioka Formation, Shimogo Formation)

• Distribution: Lake Tsurugaike, Shimogo city, Minamiaizu county, Fukushima pref.

• Yamamoto (1999) Geology of the Tajima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 85p. (in Japanese with English abstract 8p.)