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Y-1 Tephra

Abbr.: Y-1

Invalid synonym: Kabuhirakata Tuff

• Tephra
• Miocene (9.1 Ma, FT)
• Correlation: Tate Tuff

• Lithofacies: Tuff

• Host: Yagii Formation

• Distribution: Saitama pref.

• Geshi and Takeuchi (2012) Geology of the Haruna San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 79p. (in Japanese with English abstract 3p.)