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Ka-TB Tephra Niigata Volcanic Ash Research Group, 1983

Abbr.: Ka-TB

• Tephra
• Pleistocene

• Lithofacies: Tuff breccia

• Host: Uonuma Formation, Nakajogawa Member
• Thickness: 10 m or less

• Distribution: Mount Yamabuse, Tokamachi city, Niiagata pref.

• Takeuchi et al. (2000) Geology of the Matsunoyama Onsen District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 76p. (in Japanese with English abstract 5p.)