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Nantai Tephra

• Tephra
• Pleistocene - Holocene

• Lithofacies: Pumice, Volcanic sands, Volcanic ash

• Thickness: 1 - 2 m

• Distribution: Mount Nantai - Sanno pass - Nikko - Ashio town, Nikko city, Tochigi pref.

• Kawata and Ozawa (1955) Ashio, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 7p.)
• Kawata (1955) Nantaizan, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 43p. (in Japanese with English abstract 7p.)