Fox Hills Formation
| Fox Hills Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Lithology | |
| Primary | Sandstone |
| Other | Shale |
The Fox Hills Formation is a Cretaceous geologic formation in the northwestern Great Plains of North America. It is present from Alberta on the north to Colorado in the south.
Dinosaur remains including those of the tyrannosaurs as well as those of non-dinosaur mosasaurs are among the fossils that have been recovered from the formation.[1]
Lithology
The Fox Hills Formation consists of marginal marine yellow sandstone with shale interbeds.[2] It was deposited as a regressive sequence during the retreat of the Western Interior Seaway in Late Cretaceous time. It is underlain by the marine Pierre Shale in the US and by the equivalent Bearpaw Formation in Canada. The Fox Hills is overlain by continental sediments, called the Laramie Formation in the US.
See also
References
- ^ Getman, Myron RC (1994). "Occurrences of Mosasaur and other reptilian fossil remains from the Fox Hills Formation (Maastrichtian: late Cretaceous) of North Dakota". St. Lawrence University Dept. of Geology theses.
{{cite journal}}: Cite journal requires|journal=(help) - ^ Lexicon of Canadian Geologic Units. "Fox Hills Formation". Retrieved 2010-02-01.
| Canada | |
|---|---|
| United States |
|
| Mexico | |
| South America | |
| Australia | |
| New Zealand | |
| Africa | |
| Middle-East | |
| Europe | |
| Related articles | |
 | This article about a specific stratigraphic formation in the United States is a stub. You can help Wikipedia by expanding it. |
| This article about a specific stratigraphic formation is a stub. You can help Wikipedia by expanding it. |