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Okamura Tephra
- Tephra
- Pleistocene (1.4 Ma, FT)
- Lithofacies: Vitreous volcanic ash
- Distribution: Okamura, Saijo city, Ehime pref.
- Kawamura and Nishiyama (2019) Jour. Geol. Soc. Japan, vol.125, no.1, pp.87-105 DOI
- Ikeda et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.7, pp.445-470 DOI
- Aoya et al. (2013) Geology of the Niihama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 181p. (in Japanese with English abstract 3p.)