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Sofuri Tephra Itoigawa, 1971
Invalid synonym: Yawata Tephra
- Lithofacies: Volcanic ash (3 units)
- Lithofacies (Lower, Minor): Accretionary lapilli
- Sedimentary structures (Upper): Parallel stratification
- Sedimentary structures (Middle): Parallel stratification
- Sedimentary structures (Lower): Graded bedding, Parallel stratification, Convolute lamination
- Host: Tokoname Formation
- Thickness: ca. 150 cm
- Thickness (Upper): 10 - 80 cm
- Thickness (Middle): 5 - 60 cm
- Thickness (Lower): 5 - 50 cm
- Distribution: Sori, Chita city, Aichi pref.; Hirajima, Yokosuka town, Tokai city, Aichi pref.; Ebata town, Obu city, Aichi pref.
- Fossils: Plant leaves
- Yoshida and Ozaki (1986) Geology of the Handa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 98p. (in Japanese with English abstract 4p.)
- Sakamoto et al. (1986) Geology of the Nagoya-Nambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 55p. (in Japanese with English abstract 3p.)