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Biwadani Tephra Mizuno and Momohara, 1993

• Tephra
• Pleistocene
• Correlation: Nishikawa, Gojo 4, Ss-Pnk

• Lithofacies: Vitreous volcanic ash

• Thickness: 30 - 100 cm
• Host: Kaseda Formation

• Distribution: Biwadani, Kinokawa city, Wakayama pref.; Anabushigawa river, Katsuragi city, Ito county, Wakayama pref.

• Makimoto et al. (2004) Geology of the Kokawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 89p. (in Japanese with English abstract 4p.)