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Masugi Tephra Yokoyama et al., 1968

• Type locality: Kamimasugi, Koka city, Shiga prefecture
• Tephra
• Pliocene - Pleistocene (3.1 Ma, FT)
• Correlation: Dacite Tephra, Ichinohara Tephra

• Lithofacies: Volcanic ash

• Thickness: 18 - 30 cm
• Host: Wada Member, Kaigake Member

• Distribution: Kamimasugi - Wadagawa river, Koka city, Shiga pref.; Kitasunakawa river, Hino city, Gamo county, Shiga pref.

• 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.)
• Kawabe et al. (1996) Geology of the Ueno District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 99p. (in Japanese with English abstract 5p.)
• Miyamura et al. (1981) Geology of the Kameyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 128p. (in Japanese with English abstract 9p.)
• Miyamura et al. (1976) Geology of the Hikonetobu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 49p. (in Japanese with English abstract 6p.)