Plainview Formation

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; -105.3Coordinates: 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) Plainview Formation (Colorado) Show map of the United StatesShow map of ColoradoShow all

The Plainview Formation is a 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

References[]

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". 38. 155–164.
• Lockley, M.G. 1987. Dinosaur footprints from the Dakota Group of eastern Colorado. 24. 107–122.