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Ohta Tephra

Synonym: Znp-Ohta Tephra, Nakatsugawa I&II Tuff Bed (Tono region)

• Tephra
• Pliocene (3.97 Ma, FT; 3.94 Ma, U-Pb; 5.2, 4.2, 3.3 Ma, FT)

• Lithofacies: Pyroclastic flow deposit
• Lithofacies (Minor): Flood flow deposit

• Source: Chubu Sangaku area
• Host: Toki Sand and Gravel Formation

• Distribution: Nakatsugawa city, Gifu pref.

• Ueki et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.3, pp.227-236 DOI