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Iizuna volcano caldera Lacustrine Deposit Nagamori et al., 2003

• Type locality: Osawa creek, Iizuna volcano caldera, Nagano prefecture
• Coherent formation
• Pleistocene

• Sedimentary facies: Lacustrine
• Lithofacies: Tuffaceous sands, Tuffaceous silt
• Lithofacies (Minor): Gravels, Sands, Peat
• Sedimentary structures: Lamination

• Thickness: 10 m or thicker

• Distribution: Osawa creek, Iizuna volcano caldera, 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.)