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J7 Tephra Tokuhashi and Endo, 1984

Abbr.: J7

• Tephra
• Pleistocene

• Lithofacies (Upper): Scoriaceous volcanic ash
• Lithofacies (Lower): Volcanic ash

• Host: Jizodo Formation
• Thickness (Upper): ca. 6 cm
• Thickness (Lower): ca. 4 cm

• Distribution: Tagawa, Kisarazu city, Chiba pref.

• Tokuhashi and Endo (1984) Geology of the Anesaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 136p. (in Japanese with English abstract 6p.)