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O6 Tephra

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

• Lithofacies (Upper): Coarse tuff
• Lithofacies (Lower): Pumice tuff

• Thickness: ca. 13 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.)