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Yokosuka Tephra

• Type locality: Yokosuka high school, Yokosuka town, Tokai city, Aichi prefecture
• Tephra
• Pliocene

• Lithofacies: Volcanic ash

• Thickness: ca. 150 - 200 cm
• Host: Futto Formation

• Distribution: Yokosuka high school, Yokosuka town, Tokai city, Aichi pref.

• Sakamoto et al. (1986) Geology of the Nagoya-Nambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 55p. (in Japanese with English abstract 3p.)