The Nicely Formation is a geologic formation in the Crook, Grant, and Harney Counties in Oregon. It preserves radiolaria and ichthyosaur fossils dating back to the Pliensbachian stage of the Early Jurassic period.[1]

Nicely Formation
Stratigraphic range: late Pliensbachian
~186–183 Ma
TypeFormation
Lithology
PrimaryMudstone, limestone
OtherShale, siltstone
Location
Coordinates44°06′N 119°24′W / 44.1°N 119.4°W / 44.1; -119.4
Approximate paleocoordinates28°24′N 56°06′W / 28.4°N 56.1°W / 28.4; -56.1
RegionCrook, Grant & Harney Counties, Oregon
Country United States
ExtentSnake River Basin
Nicely Formation is located in the United States
Nicely Formation
Nicely Formation (the United States)
Nicely Formation is located in Oregon
Nicely Formation
Nicely Formation (Oregon)

Fossil content

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Among others, the following fossils have been reported from the formation:[1]

See also

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References

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  1. ^ a b Nicely Formation at Fossilworks.org
  2. ^ Orr & Katsura, 1985

Bibliography

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  • Orr, W. N.; Katsura, K. T. (1985), "Oregon's oldest vertebrates [Ichthyosauria(Reptilia)]", Oregon Geology, 47: 75–77
  • K. Y. Yeh. 1987. Taxonomic Studies of Lower Jurassic Radiolaria from East-Central Oregon. National Museum of Natural Science Special Publications 2:1-169
  • E. A. Pessagno Jr. and P.A. Whalen. 1982. Lower and Middle Jurassic Radiolaria (multicyrtid Nassellariina) from California, east-central Oregon and the Queen Charlotte Islands, B.C. Micropaleontology 28(2):111-169