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Uryu Formation Toyama prefecture, 1957

Invalid synonym: Noda Pyroclastic Rocks

• Type locality: Kamiota - Uryu - Kawai, Tsubata city, Kahoku county, Ishikawa prefecture
• Volcanic rocks
• early Miocene
• Correlation: Iwaine Formation

• Sedimentary facies: Terrestrial, Fluvial
• Lithofacies (Upper): Pyroclastic flow deposit, Volcanic conglomerate, Tuff
• Lithofacies (Lower): Rhyolite pyroclastic rocks, Tuff
• Lithofacies (Lower, Minor): Volcanic conglomerate, Tuffaceous sandstone
• Lithofacies (Bottom): Conglomerate

• Thickness: a few hundreds - 700 m or thicker
• Thickness (Upper): 100 - 500 m
• Thickness (Lower): 150 - 320 m
• Upper limit: Unconformity (Yatsuo Group, Himi Formation, Hanyu Formation, Udatsuyama Formation)
• Lower limit: Unconformity (Ota Formation)

• Distribution: Uryu - Kawai - Kamiota, Tsubata city, Kahoku county, Ishikawa pref.; Kiya - Uwadana, Kahoku city, Ishikawa pref.

• Sumi et al. (1989) Geology of the Isurugi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 118p. (in Japanese with English abstract 5p.)
• Sumi (1978) Geology of the Tsubata District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 55p. (in Japanese with English abstract 4p.)