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Ogi Tephra Kobayashi and Abe, 1981

Abbr.: Og

• Type locality: Ogi, Izumozaki city, Santo county, Niigata prefecture
• Tephra
• early Pleistocene (0.8 Ma, FT)
• Correlation: Ab I

• Lithofacies: Vitreous volcanic ash

• Thickness: 0.13 - 20 m
• Host: Haizume Formation

• Distribution: Ogi, Izumozaki city, Santo county, Niigata pref.
• Fossils: Pipe rocks

• Kobayashi et al. (1995) Geology of the Kashiwazaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 102p. (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.)