Park City Formation

Park City Formation
Stratigraphic range: Kungurian-Guadalupian, ~280–260 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Park City Formation in Dinosaur National Monument, Utah
Type	Formation
Underlies	Dinwoody Formation
Overlies	Weber Formation, Tensleep Formation
Area	60,000 square kilometers
Thickness	300-30 meters
Location
Region	Montana, Utah, Idaho, Wyoming
Country	United States
Type section
Named by	Boutwell, 1906

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The Park City Formation is a fossiliferous sedimentary formation from the late Permian of Utah, Idaho, Wyoming, and Montana. It is defined by its cherty, gray to pinkish limestone, calcareous siltstone, and cherty sandstone. The rocks in this formation formed along a shallow marine continental shelf and were regularly interrupted by the Phosphoria Formation due to tectonic forces and sea level change.