| Plainview Formation | |
|---|---|
| Stratigraphic range: Albian ~112–100 Ma PreꞒ Ꞓ O S D C P T J K Pg N | |
| Type | Geological formation |
| Unit of | Dakota Group |
| Underlies | Glencairn Formation |
| Overlies | Lytle Formation |
| Lithology | |
| Primary | Sandstone |
| Other | Shale, siltstone |
| Location | |
| Coordinates | 38°24′N 105°18′W / 38.4°N 105.3°W / 38.4; -105.3 |
| Approximate paleocoordinates | 37°24′N 61°42′W / 37.4°N 61.7°W / 37.4; -61.7 |
| Region | Colorado |
| Country |  United States |
  Plainview Formation (the United States)Show map of the United States Plainview Formation (Colorado)Show map of Colorado | |
The Plainview Formation is an Early Cretaceous (Albian) geologic formation of the Dakota Group in Colorado. Fossil ankylosaur tracks and tracks of Caririchnium sp. have been reported from the formation.
Description
The formation overlies the Lytle Formation and is overlain by the Glencairn Formation and comprises resistant, brown-weathered sandstones, and dark shales and siilstones, also described as bioturbated brownish sandstones with black and grey silty or shaley sandstone intervals. The formation was deposited in a variety of near-shore and/or marginal marine environments. The tracks occur in the upper part of an estuarine point bar sequence, overlain by brackish bay or lagoon deposits.
See also
References
- ^ Plainview Formation at Fossilworks.org
- Weishampel et al., 2004, pp.517-607
Bibliography
- Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2, retrieved 2019-02-21
- Kurtz, W.J.; Lockley, M.G.; Engard, D.J. (2001), "Dinosaur tracks in the Plainview Formation, Dakota Group (Cretaceous, Albian) near Cañon City, Colorado: a preliminary report on another "Dinosaur Ridge"", The Mountain Geologist, 38: 155–164
- Lockley, M.G (1987), "Dinosaur footprints from the Dakota Group of eastern Colorado", The Mountain Geologist, 24: 107–122