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O3 Tephra

Abbr.: O3

• Tephra
• Pleistocene
• Correlation: Ob5.7

• Lithofacies: Vitreous tephra

• Host: Otadai Formation

• Distribution: Torami, Ichinomiya city, Chosei county, 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.)