Plainview Formation
| Plainview Formation | |
|---|---|
| Stratigraphic range: Albian ~ | |
| 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 |
| Approximate paleocoordinates | 37°24′N 61°42′W / 37.4°N 61.7°W |
| Region | Colorado |
| Country | United States |
Plainview Formation (the United States) Plainview Formation (Colorado) | |
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
References
- ^ a b 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
{{citation}}: CS1 maint: publisher location (link) - 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