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Tojoko Tuff Ozaki and Matsuura, 1988

• Type locality: Lake Tojoko, Kato city, Hyogo prefecture
• Tephra
• Eocene - Oligocene (36.9 Ma; 33.3 Ma, FT)

• Lithofacies: Tuff

• Thickness: several - 35 m
• Host: Nitta Conglomerate Member

• Distribution: Lake Tojoko - Shimokume - Mawaribuchi - Shobudani, Kato city, Hyogo pref.; Okawase - Kamiaino - Hirose - Toishigawa - Kuwahara - Shimotanaka, Sanda city, Hyogo pref.; Dojo town - Osawa town, Kobe city, Hyogo pref.; Arino, Yamaguchi town, Nishinomiya city, Hyogo pref.

• Matsuura et al. (1995) Geology of the Hirone District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 110p. (in Japanese with English abstract 6p.)
• Ozaki and Matsuura (1988) Geology of the Sanda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (in Japanese with English abstract 5p.)