Frontier Formation
| Frontier Formation | |
|---|---|
| Stratigraphic range: Cenomanian-Coniacian | |
_14_(48822462432).jpg) Frontier Formation in Utah (Dinosaur National Monument) | |
| Type | Geological formation |
| Sub-units | Torchlight Sandstone Member, Peay Sandstone Member |
| Underlies | Cody Shale |
| Overlies | Mowry Shale, Thermopolis Shale |
| Lithology | |
| Primary | Sandstone |
| Other | Shale |
| Location | |
| Region | North America |
| Country | United States |
| Extent | see text |
| Type section | |
| Named by | W. C. Knight, 1902[1] |
The Frontier Formation is a sedimentary geological
formation whose strata date back to the Late Cretaceous. The formation's extents are: northwest Colorado, southeast Idaho, southern Montana, northern Utah, and western Wyoming
. It occurs in many sedimentary basins and uplifted areas.
The formation is described by W.G. Pierce as thick, lenticular, grey sandstone, gray shale, carbonaceous shale, and bentonite.[2]
Dinosaur remains are among the fossils that have been recovered from the formation.[3]
Vertebrate paleofauna
- Nodosaurus textilis
- Stegopelta landerensis - "Partial postcranium, osteoderms, [and] fragments of skull."[4]
- Hadrosauroidea indet. Footprints (Upper)[5]
Other paleofauna
See also
- List of dinosaur-bearing rock formations
References
- ^ W.C. Knight, 1902, Eng. and Min. Jour., v. 73, p. 721
- ^ Pierce, W.G., 1997, Geologic map of the Cody 1 degree x 2 degrees quadrangle, northwestern Wyoming: U.S. Geological Survey, Miscellaneous Geologic Investigations Map I-2500, scale 1:250000.
- ISBN 0-520-24209-2.
- ^ "Table 17.1," in Weishampel, et al. (2004). Page 367.
- Geological Society of America Abstracts with Programs. 53 (6) – via The Geological Society of America (GSA) Connects 2021.
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