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OT3 Tuff (Hayakawa and Takemura, 1987) Tamura and Yamazaki, 2004

Abbr.: OT3

• Type locality: Kamize, Fuchu town, Toyama city, Toyama prefecture
• Tephra
• Pliocene (3.9 Ma, U-Pb; 5.2, 4.0 Ma, FT)
• Correlation: Turibe 1-Ya4 (4.15 Ma)

• Lithofacies (Upper): Tuff
• Lithofacies (Lower): Pumice tuff

• Host: Mita Formation, Yoshikura Mudstone Member

• Distribution: Kamize, Fuchu town, Toyama city, Toyama pref.; Giyagoe tunnel, Tsubata city, Kahoku county, Ishikawa pref.

• Nakajima et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.483-516 DOI
• Sumi et al. (1989) Geology of the Isurugi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 118p. (in Japanese with English abstract 5p.)