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Gray Tephra

• Tephra
• Pleistocene (1.2 Ma, FT)

• Host: Ma 0

• Distribution: Osaka pref.

• Huzita and Kasama (1982) Geology of the Osaka-Seihokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 112p. (in Japanese with English abstract 8p.)