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Sn Tephra Mizuno et al., 1987

Abbr.: Sn

• Type locality: Shinsho, Makinohara city, Shizuoka prefecture
• Tephra
• middle Miocene - Pliocene

• Lithofacies (Upper): Vitreous volcanic ash
• Lithofacies (Lower): Vitreous volcanic ash
• Sedimentary structures (Lower): Parallel stratification

• Host: Jitogata Alternation
• Thickness (Upper): 1 m or thicker
• Thickness (Lower): ca. 2 m

• Distribution: Shinsho, Makinohara city, Shizuoka pref.

• Sugiyama et al. (1988) Geology of the Omaezaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 153p. (in Japanese with English abstract 6p.)