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Asano 1 Tephra Mizuno et al., 1990

• Type locality: Asano, Awaji city, Hyogo prefecture
• Tephra
• Pleistocene
• Correlation: Habutaki II, Sako

• Lithofacies: Vitreous volcanic ash

• Host: Asano Member
• Thickness: 40 - 100 cm

• Distribution: Asano - Ikuta-Otsubo - Ikutahata, Awaji city, Hyogo pref.

• Takahashi et al. (1992) Geology of the Sumoto District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 107p. (in Japanese with English abstract 5p.)
• Mizuno et al. (1990) Geology of the Akashi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 90p. (in Japanese with English abstract 5p.)