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Yamadanaka Tuff

• Type locality: Yamada river, Nakamura, Yamada, Toyama city, Toyama prefecture
• Tephra
• Miocene (16.6 Ma, U-Pb; 16.4 Ma, FT)
• Correlation: Nanamagari Tuff Member

• Lithofacies: Pumice tuff (2 - 4 sheets)

• Thickness: 5 - 35 m
• Host: Kurosedani Formation, Shakusenji Mudstone Member

• Distribution: Shogawa river - Yamadagawa river - Joganjigawa river - Nunome, Toyama city, Toyama pref.

• Nakajima et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.483-516 DOI
• Sakamoto and Nozawa (1960) Yatsuo, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 8p.)
• Nozawa and Sakamoto (1960) Gohyakkoku, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 68p. (in Japanese with English abstract 10p.)