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Butaitoge Formation

• Coherent formation
• Pleistocene

• Sedimentary facies: Fluvial
• Lithofacies (Upper): Clay
• Lithofacies (Lower): Gravels

• Thickness (Lower): 3 m or thicker
• Lower limit: Unconformity (Nohi Rhyolites)

• Distribution: Butaitoge pass, Gero city, Gifu pref.

• Yamada (1961) Kashimo, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 25p. (in Japanese with English abstract 7p.)