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Nishikawa Tephra

• Tephra
• Pleistocene
• Correlation: Biwadani

• Lithofacies: Volcanic ash

• Distribution: Koyaguchi town, Hashimoto city, Wakayama pref.

• Makimoto et al. (2004) Geology of the Kokawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 89p. (in Japanese with English abstract 4p.)