Frontier Formation

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.

Frontier Formation
Stratigraphic range: Cenomanian
TypeGeological formation
Sub-unitsTorchlight Sandstone Member, Peay Sandstone Member
UnderliesCody Shale
OverliesMowry Shale, Thermopolis Shale
Lithology
PrimarySandstone
OtherShale
Location
RegionNorth America
CountryUnited States
Extentsee text
Type section
Named byW. C. Knight, 1902[1]

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

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See also

  • List of dinosaur-bearing rock formations

References

  1. W.C. Knight, 1902, Eng. and Min. Jour., v. 73, p. 721
  2. 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.
  3. Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, North America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 574-588. ISBN 0-520-24209-2.
  4. "Table 17.1," in Weishampel, et al. (2004). Page 367.
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