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Ojoji Tuff Bed
- Lithofacies: Volcanic ash
- Thickness: ca. 3 m or thinner
- Distribution: Zafu - Kuzukake, Ohira city, Kurokawa county, Miyagi pref.
- Kitamura et al. (1983) Geology of the Yoshioka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 50p. (in Japanese with English abstract 5p.)