[ Top ] [ Japanese ]

Funaishi Formation

• Coherent formation
• middle Pleistocene
• Correlation: Shiobara Formation

• Lithofacies (Upper): Gravels
• Lithofacies (Lower): Interbedded mudstone and scoria

• Thickness: ca. 140 m
• Thickness (Upper): 90 m
• Thickness (Lower): ca. 50 m
• Lower limit: Unconformity (Ashio Rhyolitic Welded Tuff)

• Distribution: Funaishi pass - Kuroishi, Ashio town, Nikko city, Tochigi pref.
• Fossils (Plants): Castanea crenata, Fagus japonica, Magnolia obovata, Quercus crispula, Tilia japonica, Viburnum furcatum

• Kawata and Ozawa (1955) Ashio, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 7p.)