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Biroku I Tephra Mori and Kimura, 1973

• Type locality: Biroku, Tado town, Kuwana city, Mie prefecture
• Tephra
• Pliocene

• Lithofacies: Volcanic ash

• Host: Kono Formation
• Thickness: 30 - 40 cm

• Distribution: Biroku, Tado town, Kuwana city, Mie pref.

• Yoshida et al. (1991) Geology of the Kuwana District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 154p. (in Japanese with English abstract 5p.)