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
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
Description
The Glen Canyon Group consists of extensive
The Glen Canyon Group was deposited in a
The Kayenta Formation pinches out and disappears to the north, in the
Subunits
Group rank (stratigraphic order):[2]
- Navajo Sandstone (AZ*,[10] CO*,[11] NM*,[12] UT*[13]),
- Kayenta Formation (AZ,[10] CO*,[14] UT*[13]),
- Moenave Formation (AZ*,[10] NV*,[15] UT*[13]),
- Wingate Sandstone (AZ*,[10] CO*,[16] NM*,[2] UT*[17])
History of investigation
There is no designated
In 1936, A.A. Baker reexamined the group and named the Kayenta Formation.[20] The work was revised again in 1955 by Averitt and others. They assigned the Shurtz Sandstone Tongue (new) and Lamb Point Tongue (new) to the Navajo Sandstone, and Cedar City Tongue (new) and Tenney Canyon Tongue (new) to the Kayenta Formation.[17] In 1957 Harshbarger and others created an overview and revision that assigned the Moenave Formation and divided the Wingate Sandstone into the newly named Rock Point and Lukachukai members.[2] In 1963, the upper contact was revised by Phoenix, who moved the uppermost silstone beds of the Navajo Sandstone into the Judd Hollow Tongue of the Carmel Formation.[21] Poole and Stewart mapped the group into the Green River Basin in 1964, treating it here as a single formation.[22] Areal extent limits were revised by Wilson and Stewart in 1967[23] and again by Green in 1974, who added the Iyanbito Member.[24] Peterson and Pipiringos revised the upper contact and created an overview in 1979.[13] In 1989 the age of the group was reexamined by Padian[10] and separately by Dubiel (who also revised the lower contact).[25]
Places found
Geologic Province:
- Black Mesa Basin[25]
- Great Basin province[13]
- Green River Basin[22]
- Paradox Basin[2]
- Piceance Basin[22]
- Plateau Sedimentary Province[2]
- San Juan Basin[2]
- Uinta Uplift[22]
Paleontology
Prehistoric animals from the various formations of the Glen Canyon Group include several types of
The following summarizes vertebrate fossils and tracks reported in the Glen Canyon Group:
Navajo Sandstone:
- Body fossils
- Tritylodontidae indet.[26]
- Protosuchidae indet.[26]
- Segisaurus hallii Camp[26]
- Ammosaurus[26]
- Trace fossils
Kayenta Formation:
- Body fossils
- Hybodontidae incert.[26]
- Osteichthyes incert.[26]
- Prosalirus bitis Shubin and Jenkins[26]
- Eocaecilia micropodia Jenkins and Wash[26]
- Kayentachelys aprix Gaffney et al.[26]
- ’’Sarahsaurus’’
- ’’Dilophosaurus’’
- ’’Kayentavenator’’
- ’’Scelidosaurus’’
- ’’Scutellosaurus’’
- Unnamed Heterodontosaur
- Trace fossils
Moenave Formation:
- Body fossils
- Semionotidae incert.[26]
- Reptilia indet.[26]
- Protosuchus[26]
- Lepidosauria indet.[26]
- Megapnosaurus[26]
- Trace fossils
Wingate Sandstone:
See also
References
Notes
- ^ 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. Retrieved 28 October 2021.
- ^ 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. 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.
- ^ ISBN 0-520-24209-2.
- ISBN 978-1-60781-004-9.
- doi:10.3133/pp1035A.
- ^ Fillmore 2010, pp. 170–180.
- ^ Sprinkel, D.A.; Kowallis, B.J.; Jensen, P.H. (2011). "Correlation and age of the Nugget Sandstone and Glen Canyon Group, Utah" (PDF). Utah Geological Association Publication. 40: 131–149. Retrieved 29 October 2021.
- ^ .
- doi:10.3133/pp637.
- ^ Cooper, Jack C. (1952). "Rattlesnake Oil and Gas Field San Juan County, New Mexico". Geological Symposium of the Four Corners Region. pp. 75–82. Retrieved 28 October 2021.
- ^ doi:10.3133/pp1035B.
- .
- ^ Anderson, R.E.; Hintze, L.F. (1993). "Geologic map of the Dodge Spring quadrangle, Washington County, Utah and Lincoln County, Nevada". U.S. Geological Survey Geologic Quadrangle Map. GQ-1721. Retrieved 28 October 2021.
- .
- ^ .
- .
- doi:10.3133/pp150D.
- hdl:2346/66951.
- doi:10.3133/b1137.
- ^ doi:10.3133/pp501D.
- doi:10.3133/b1244D.
- doi:10.3133/b1395D.
- ^ a b Dubiel, R.F. (1989). "Depositional and climatic setting of the Upper Triassic Chinle Formation, Colorado Plateau". In Lucas, S.G.; Hunt, A.P. (eds.). Dawn of the Age of Dinosaurs in the American Southwest. New Mexico Museum of Natural History. pp. 171–187. Retrieved 28 October 2021.
- ^ a b c d e f g h i j k l m n o p q r s t u v w x 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: 94–103. Retrieved 30 October 2021.
{{cite journal}}: Cite journal requires|journal=(help) - S2CID 134433653.
- ^ a b c d e f g h i j Smith, J.A.; Santucci, V.L.; Reynolds, R.E. (April 2001). "Vertebrate ichnostratigraphy of the Glen Canyon Group (Jurassic) in Zion National Park, Utah". In Reynolds, R.E. (ed.). The changing face of the east Mojave Desert. 2001 Desert Symposium (PDF). Fullerton: California State University Desert Studies Consortium. pp. 15–19. Archived from the original (PDF) on 2 November 2023. Retrieved 30 October 2021.
- ^ Lockley, M.G.; Gierlinkski, G.D. (2014). "A new Otozoum-dominated tracksite in the Glen Canyon Group (Jurassic) of eastern Utah". New Mexico Museum of Natural History and Science Bulletin. 62: 211–214. Retrieved 30 October 2021.
External links
- GEOLEX database entry for Glen Canyon, USGS (viewed 19 March 2006)
- GEOLEX database Bibliographic References for Glen Canyon, USGS (viewed 19 March 2006)