Earth:Plainview Formation
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Short description: Geologic formation in the United States
| Plainview Formation Stratigraphic range: Albian ~112–100 Ma | |
|---|---|
| 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 |
| Paleocoordinates | [ ⚑ ] 37°24′N 61°42′W / 37.4°N 61.7°W |
| Region | Colorado |
| Country |  United States |
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The Plainview Formation is an Early Cretaceous (Albian) geologic formation of the Dakota Group in Colorado.[1] Fossil ankylosaur tracks and tracks of Caririchnium sp. have been reported from the formation.[2]
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.[1]
See also
- List of dinosaur-bearing rock formations
- List of stratigraphic units with ornithischian tracks
- Ankylosaur tracks
- List of stratigraphic units with ornithischian tracks
References
- ↑ 1.0 1.1 Plainview Formation at Fossilworks.org
- ↑ Weishampel et al., 2004, pp.517-607
Bibliography
- Weishampel, David B.; Peter Dodson, and Halszka (eds.) Osmólska. 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21. ISBN:0-520-24209-2
- Kurtz, W.J.; M.G. Lockley, and D.J. Engard. 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.
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