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Nagashiri Tuff Takeuchi and Kato, 1994

• Tephra
• Pliocene

• Lithofacies: Tuff

• Host: Uragawara Formation
• Thickness: 3.5 - 10 m

• Distribution: Kumadani river, Hishida, Uragawara, Joetsu city, Niigata pref.

• Takeuchi and Kato (1994) Geology of the Takada-tobu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 67p. (in Japanese with English abstract 5p.)