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Pt1 Tephra

Abbr.: Pt1

• Tephra
• Miocene

• Lithofacies: Tuff
• Lithofacies (Minor): Tuffaceous sandstone, Tuffaceous mudstone

• Thickness: ca. 20 m
• Host: Otogawa Formation

• Distribution: Oyabe city, Toyama pref.

• Sumi et al. (1989) Geology of the Isurugi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 118p. (in Japanese with English abstract 5p.)