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Marune Tephra

• Tephra
• Pliocene (ca. 4.0 Ma; 4.7 Ma, FT)
• Correlation: Kosugaya Tephra

• Lithofacies: Volcanic ash

• Host: Yadagawa Formation

• Distribution: Orido town, Nisshin city, Aichi pref.

• Nakashima et al. (2021) Geology of the Toyota District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 91p. (in Japanese with English abstract 4p.)