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Nwp Tephra

Abbr.: Nwp

• Tephra
• Pliocene - Pleistocene

• Lithofacies: Volcanic ash

• Host: Ogawa Formation

• Distribution: Niigata pref.

• Yanagisawa et al. (2000) Geology of the Iiyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 144p. (in Japanese with English abstract 6p.)