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Hantarozawa Welded Tuff (Ministry of International Trade and Industry, 1969), Uemura, 1975

Invalid synonym: Hantarozawa Formation

• Type locality: Hantaro creek, Kawauchi town, Mutsu city, Aomori prefecture
• Volcanic rocks
• Miocene - Pliocene

• Lithofacies: Dacitic welded tuff, Pumice tuff
• Lithofacies (Basal): Conglomerate
• Lithofacies (Minor): Tuff breccia

• Thickness: 200 m
• Upper limit: Unconformity (Nodai Formation)
• Lower limit: Unconformity (Hinokigawa Formation)

• Distribution: Sai city, Shimokita county - Kawauchi town, Mutsu city, Aomori pref.

• Uemura (1975) Geology of the Mutsukawauchi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 39p. (in Japanese with English abstract 7p.)