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Shobu Tephra Yamashita et al., 2006

• Tephra
• Pleistocene (0.6 Ma, FT)

• Lithofacies: Biotite-bearing vitreous volcanic ash

• Thickness: 80 - 90 cm
• Host: Iyoki Formation

• Distribution: Shobu, Uchiko city, Kita county, Ehime pref.

• Banno et al. (2010) Geology of the Ozu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 58p. (in Japanese with English abstract 2p.)