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Htg Tephra

Abbr.: Htg

• Type locality: Niigata prefecture
• Tephra
• Pleistocene

• Lithofacies: Volcanic ash

• Host: Uonuma Formation

• Distribution: Niigata pref.

• Kobayashi et al. (2002) Geology of the Sanjo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 98p. (in Japanese with English abstract 4p.)