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Okubo Tephra

• Tephra
• Pleistocene (1.13 Ma, FT)

• Lithofacies: Volcanic ash

• Host: Akashi Formation

• Distribution: Hyogo pref.

• Ozaki et al. (1995) Geology of the Hojo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 101p. (in Japanese with English abstract 6p.)