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Takatoko Tuff Niigata University Reseach Group of Geology in Higashikubiki District, 1987

• Tephra
• Miocene

• Lithofacies: Acidic tuff

• Host: Sugawa Formation
• Thickness: 1 - 3 m

• Distribution: Takatani river, Shimoyokozumi, Yasuzuka ward, Joetsu city, Niigata pref.; Kiwadahara - Gimyo - Azamihira - Mount Nabetachi, Tokamachi city, Niigata pref.

• Takeuchi et al. (2000) Geology of the Matsunoyama Onsen District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 76p. (in Japanese with English abstract 5p.)
• 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.)
• Kobayashi et al. (1989) Geology of the Okanomachi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 112p. (in Japanese with English abstract 5p.)