Glen Canyon Group

Glen Canyon Group
Glen Canyon Group
Stratigraphic range:
	Glen Canyon Group in southeast Utah. At top are massive beds of Navajo Sandstone separated by thinner beds of the Kayenta Formation from massive beds at bottom of the Wingate Sandstone.
Type	Group
Sub-units	(oldest to youngest) Wingate Sandstone, Moenave Formation, Kayenta Formation, Navajo Sandstone
Underlies	San Rafael Group
Overlies	Chinle Formation
Location
Coordinates	36°56′17″N 111°28′59″W / 36.938°N 111.483°W
Region	Four Corners
Country	United States
Type section
Named for	Glen Canyon
Named by	Gregory and Moore
	Glen Canyon Group (the United States) Glen Canyon Group (Arizona)

The Glen Canyon Group is a geologic group of formations that is spread across the U.S. states of Nevada, Utah, northern Arizona, north west New Mexico and western Colorado. It is called the Glen Canyon Sandstone in the Green River Basin of Colorado and Utah.^[1]

There are four formations within the group. From oldest to youngest, these are the Wingate Sandstone, Moenave Formation, Kayenta Formation, and Navajo Sandstone.^[2] Part of the Colorado Plateau and the Basin and Range, this group of formations was laid down during the Late Triassic and Early Jurassic, with the Triassic-Jurassic boundary within the Wingate Sandstone.^[3]^[4] The top of the Glen Canyon Group is thought to date to the Toarcian stage of the Early Jurassic.^[5]

Asterisks (*) below indicate usage by the U.S. Geological Survey.

^ Rowley, P.D.; Hansen, W.R. (1979). "Geologic map of the Plug Hat quadrangle, Moffat County, Colorado". U.S. Geological Survey Geologic Quadrangle Map. GQ-1514. Archived from the original on 19 September 2021. Retrieved 28 October 2021.
^ Harshbarger, J.W.; Repenning, C.A.; Irwin, J.H. (1957). "Stratigraphy of the uppermost Triassic and the Jurassic rocks of the Navajo country". United States Geological Survey Professional Paper. Professional Paper. 291. doi:10.3133/pp291.
^ Lucas, S. G.; Heckert, A.B.; Estep, J.W.; Anderson, O.J. (1997). "Stratigraphy, biostratigraphy, and sequence stratigraphy of the Upper Triassic Chinle Group, Four Corners region" (PDF). New Mexico Geological Society Field Conference Series. 48: 81–107. Archived (PDF) from the original on 28 October 2021. Retrieved 28 October 2021.
^ Lucas, S.G.; Heckert, A.B.; Tanner, L.H. (2005). "Arizona's Jurassic fossil vertebrates and the age of the Glen Canyon Group". New Mexico Museum of Natural History and Science Bulletin. 29: 95–104. Retrieved 28 October 2021.
^ Weishampel, David B.; Barrett, Paul M.; Coria, Rodolfo A.; Le Loueff, Jean; Xu, Xing Zhao Xijin; Sahni, Ashok; Gomani, Elizabeth M.P.; Noto, Christopher N. (2004). "Dinosaur distribution". In Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (eds.). The Dinosauria (2nd ed.). Berkeley: University of California Press. pp. 517–606. ISBN 0-520-24209-2.