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Kinasa Tuff 20 Nagamori et al., 2003

Abbr.: Kns20

• Tephra
• Miocene
• Correlation: Susobana Formation

• Lithofacies (Upper): Tuff
• Lithofacies (Lower): Tuff breccia
• Sedimentary structures (Upper): Parallel stratification

• Host: Ronji Formation
• Thickness: 5 m or thicker

• Distribution: Kinasa, Nagano city, 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.)