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Nakatsugawa I Tephra

• Tephra
• Pliocene (4.0 - 3.9 Ma, FT, U-Pb)
• Correlation: Ohta Tephra

• Lithofacies: Tephra

• Host: Toki Sand and Gravel Formation

• Distribution: Ena city - Nakatsugawa city, Gifu pref.

• Yamasaki et al. (2020) Geology of the Akechi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 120p. (in Japanese with English abstract 5p.)
• Ueki et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.3, pp.227-236 DOI