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Uchinamigawa Formation

Corresponds to Kuzuryu Group and Itoshiro Subgroup

• Coherent formation
• Jurassic - Cretaceous
• Intruded by: Diorite dikes

• Lithofacies (Upper): Interbedded sandstone and shale
• Lithofacies (Upper, Minor): Conglomerate, Tuff
• Lithofacies (Lower): Conglomerate, Gravel-bearing sandstone
• Lithofacies (Lower, Minor): Shale

• Lower limit: Unconformity (Hida Gneiss, Kamiuchinami Formation)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Nabegahira - Momogahira - Shimouchinami, Uchinamigawa river, Ono city, Fukui pref.
• Fossils (Plants): Cladophlebis hukuiensis, Podozamites lanceclatus

• Kawai et al. (1957) Arashimadake, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 110p. (in Japanese with English abstract 13p.)