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Tazawa Formation (Ikebe, 1941) Kobayashi et al., 1993

• Type locality: Tazawa, Nishiyama town, Kashiwazaki city, Niigata prefecture
• Coherent formation
• middle - late Pleistocene
• Correlation: Otsubo Formation

• Lithofacies: Sands and gravels, Sandy mud, Mud
• Sedimentary structures: Cross stratification

• Thickness: ca. 30 m
• Upper limit: Unconformity
• Lower limit: Unconformity (Uonuma Formation, Haizume Formation)

• Distribution: Tazawa, Nishiyama town, Kashiwazaki city, Niigata pref.; Shimazaki river, Daimon - Myohoji, Izumozaki city, Santo county, Niigata pref.; Tanaka, Izumozaki city, Santo county, Niigata pref.
• Fossils: Plants

• 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.)