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HZG1 Tephra (Tsuneyama et al., 1989) Kobayashi et al., 1991

Abbr.: HZG1

• Type locality: Hanzogane, Nagaoka city, Niigata prefecture
• Tephra
• Pliocene (6.54 Ma, FT)

• Lithofacies: Andesitic tuff breccia, Tuff

• Host: Kakuma Formation
• Thickness: ca. 100 cm

• Distribution: Hanzogane - Nishitani river - Moriage, Nagaoka city, Niigata pref.

• Kobayashi et al. (1991) Geology of the Nagaoka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 132p. (in Japanese with English abstract 6p.)