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Tazawa Formation

• Coherent formation
• Pleistocene

• Lithofacies: Pumice, Gravels, Clay

• Thickness: A few dozen m
• Upper limit: Unconformity (Loam)
• Lower limit: Unconformity (Akagi volcano)

• Distribution: Shimotazawa, Kurohone town, Kiryu city, Gunma pref.; Tone town, Numata city, Gunma pref.

• Kawata and Ozawa (1955) Ashio, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 7p.)