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Ishigamiyama Tuff

• Type locality: Mount Ishigamiyama, Hosokawa town, Miki city, Hyogo prefecture
• Tephra
• Eocene - Oligocene

• Lithofacies: Tuff

• Thickness: ca. 10 m
• Host: Harasaka Mudstone Member, Kichiyasu Sandstone, Mudstone and Conglomerate Member

• Distribution: Mount Ishigamiyama - Momosaka, Hosokawa town, Miki city, Hyogo pref.; Kuranotani, Kato city, Hyogo pref.; Ogo, Ogo town, Kobe city, Hyogo pref.

• 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.)