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Ij Tephra

Abbr.: Ij

• Type locality: Ishiji, Nishiyama town, Kashiwazaki city, Niigata prefecture
• Tephra
• middle - late Miocene (8.5 Ma, FT)
• Correlation: Nz

• Lithofacies (Upper): Sandy tuff
• Lithofacies (Lower): Pumiceous tuff
• Sedimentary structures (Minor): Cross stratification

• Thickness (Upper): 150 cm or thicker
• Thickness (Lower): 50 cm or thicker
• Host: Teradomari Formation

• Distribution: Ishiji, Nishiyama town, Kashiwazaki city, Niigata pref.

• 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.)