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Jokoku II Tephra
- Tephra
- Pliocene - Pleistocene
- Lithofacies: Volcanic ash
- Distribution: Jokoku, Ritto city, Shiga pref.; Otogawa river, Ishizue, Otsu city, Shiga pref.; Kiryu town, Otsu city, Shiga pref.
- Wakita et al. (2013) Geology of the Kyoto-Tonambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 124p. (in Japanese with English abstract 3p.)
- Nakano et al. (2003) Geology of the Minakuchi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 83p. (in Japanese with English abstract 3p.)