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J1 Tephra Tokuhashi and Endo, 1984

Abbr.: J1

Invalid synonym: Iy

• Tephra
• Pleistocene

• Lithofacies: Vitreous volcanic ash

• Host: Izumiyatsu Member
• Thickness: ca. 10 cm

• Distribution: Nanamagari, Kayano, Kisarazu city, Chiba pref.; Kogochi, Ichihara city, Chiba pref.

• Nanayama et al. (2016) Geology of the Mobara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 101p. (in Japanese with English abstract 4p.)
• 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.)