[ Top ] [ Japanese ]

Nakayama Tuff Yoneyama Research Group, 1973

• Tephra
• Miocene (8.2 Ma, FT)

• Lithofacies: Rhyolite pumice tuff

• Host: Ogaya Formation, Teradomari Formation
• Thickness: 40 m

• Distribution: Niigata pref.

• Takeuchi et al. (1996) Geology of the Kakizaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 48p. (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.)