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O8 Tephra

• Type locality: Tsugihashi, Matsuyama, Osaki city Miyagi prefecture
• Tephra
• Miocene

• Lithofacies (Top): Fine tuff
• Lithofacies: Coarse tuff

• Thickness: ca. 6 m
• Thickness (Top): ca. 1 m
• Host: Omatsuzawa Formation

• Distribution: Tsugihashi, Matsuyama, Osaki city Miyagi pref.

• Ishii et al. (1982) Geology of the Matsushima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 121p. (in Japanese with English abstract 9p.)