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Ka Tephra

Abbr.: Ka

• Tephra
• middle - late Miocene

• Lithofacies: Tuff

• Host: Teradomari Formation

• Distribution: Katsumi, Izumozaki city, Santo county, Niigata pref.

• Kobayashi et al. (2002) Geology of the Sanjo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 98p. (in Japanese with English abstract 4p.)
• Kobayashi et al. (1993) Geology of the Izumozaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 91p. (in Japanese with English abstract 4p.)