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Sg Tephra

Abbr.: Sg

• Type locality: Tanakusa, Kikukawa city - Shimogumi, Makinohara city, Shizuoka prefecture
• Tephra
• Pliocene - early Pleistocene

• Lithofacies (Upper): Silty volcanic ash
• Lithofacies (Middle): Sandy volcanic ash
• Lithofacies (Lower): Volcanic ash

• Host: Horinouchi Alternation
• Thickness: ca. 0.5 - 3 m
• Thickness (Upper): 0.5 - 2.5 m
• Thickness (Middle): ca. 40 cm
• Thickness (Lower): ca. 10 cm

• Distribution: Tanakusa, Kikukawa city, Shizuoka pref.; Shimogumi, 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.)