• Source: Kirtland Formation

The Kirtland Formation (originally the Kirtland Shale) is a sedimentary geological formation.




Description


The Kirtland Formation is the product of alluvial muds and overbank sand deposits from the many channels draining the coastal plain that existed on the inland seashore of North America, in the late Cretaceous period. It overlies the Fruitland Formation. It is found in the San Juan Basin in the states of New Mexico and Colorado, in the United States of America.
The base of the Kirtland Formation and its lowest sub-unit, the Hunter Wash member, has been dated to 75.02 ± 0.13 Ma. Together with the upper part of the underlying Fruitland Formation, this contains fossils representing the Hunter Wash local fauna. The border between the Hunter Wash member and overlying Farmington member dates to approximately 74 million years ago. The top of the Farmington member and bottom of the overlying De-na-zin member has been radiometrically dated to 73.83 ± 0.18 Ma ago. The top of the De-na-zin member, which contains the Willow Wash local fauna, has been dated to 73.49 ± 0.25 Ma ago.
Overlying the De-na-zin member is a unit called the Naashoibito member This has often been considered to be part of the Kirtland formation, but more recently has been transferred back to the overlying Ojo Alamo Formation, which it had originally been part of.




History of investigation


The formation was named by C.M. Bauer in 1916 for exposures near the Kirtland Post Office.




Stratigraphy






Vertebrate paleofauna






= Saurischians

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= Ornithischians

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= Pterosaurs

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= Crurotarsans

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= Turtles

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= Bony fish

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= Cartilaginous fish

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See also


List of stratigraphic units with dinosaur body fossils




References






= Bibliography

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Arbour, Victoria M.; Burns, Michael E.; Sullivan, Robert M.; Lucas, Spencer G.; Cantrell, Amanda K.; Fry, Joshua; Suazo, Thomas L. (24 September 2014). "A New Ankylosaurid Dinosaur from the Upper Cretaceous (Kirtlandian) of New Mexico with Implications for Ankylosaurid Diversity in the Upper Cretaceous of Western North America". PLOS ONE. 9 (9): e108804. Bibcode:2014PLoSO...9j8804A. doi:10.1371/journal.pone.0108804. PMC 4177562. PMID 25250819.
Bauer, C. M. (1916). "Stratigraphy of a part of the Chaco River Valley". U.S. Geol. Survey Prof. Paper. 98-P. doi:10.3133/pp98P.
Burns, Michael E. (2008). "Taxonomic utility of ankylosaur (Dinosauria, Ornithischia) osteoderms: Glyptodontopelta mimus Ford, 2000: a test case". Journal of Vertebrate Paleontology. 28 (4): 1102–1109. Bibcode:2008JVPal..28.1102B. doi:10.1671/0272-4634-28.4.1102. S2CID 140672072.
Burns, Michael E.; Sullivan, Robert M. (2011). "A new ankylosaurid from the Upper Cretaceous Kirtland Formation, San Juan Basin, with comments on the diversity of ankylosaurids in New Mexico" (PDF). Fossil Record 3. New Mexico Museum of Natural History and Science, Bulletin. 53: 169–178.
Carr, T.D.; Williamson, T.E. (2010). "Bistahieversor sealeyi, gen. et sp. nov., a new tyrannosauroid from New Mexico and the origin of deep snouts in Tyrannosauroidea". Journal of Vertebrate Paleontology. 30 (1): 1–16. Bibcode:2010JVPal..30....1C. doi:10.1080/02724630903413032. S2CID 54029279.
Evans, David C.; Larson, Derek W.; Cullen, Thomas M.; Sullivan, Robert M.; Sues, Hans-Dieter (2014). ""Saurornitholestes" robustus is a troodontid (Dinosauria: Theropoda)". Canadian Journal of Earth Sciences. 51 (7): 730–734. Bibcode:2014CaJES..51..730E. doi:10.1139/cjes-2014-0073.
Fowler, Denver Warwick (22 November 2017). "Revised geochronology, correlation, and dinosaur stratigraphic ranges of the Santonian-Maastrichtian (Late Cretaceous) formations of the Western Interior of North America". PLOS ONE. 12 (11): e0188426. Bibcode:2017PLoSO..1288426F. doi:10.1371/journal.pone.0188426. PMC 5699823. PMID 29166406.
Jasinski, Steven (2016). "A new dromaeosaurid (Theropoda: Dromaeosauridae) from the Late Cretaceous of New Mexico (B&W)". New Mexico Museum of Natural History and Science Bulletin. 67: 79–88.
Jasinski, Steven E.; Sullivan, Robert M. (2011). "Re-evaluation of pachycephalosaurids from the Fruitland-Kirtland transition (Kirtlandian, late Campanian), San Juan Basin, New Mexico, with a description of a new species of Stegoceras and a reassessment of Texascephale langstoni" (PDF). Fossil Record 3. New Mexico Museum of Natural History and Science, Bulletin. 53: 202–215.
Jasinski, S. E.; Sullivan, R. M.; Lucas, S. G. (2011). "Taxonomic composition of the Alamo Wash local fauna from the Upper Cretaceous Ojo Alamo Formation (Naashoibito Member) San Juan Basin, New Mexico". New Mexico Museum of Natural History and Science Bulletin. 53: 216–271. Retrieved 11 September 2020.
Sullivan, R.M. (2006). "Saurornitholestes robustus, n. sp. (Theropoda:Dromaeosauridae) from the Upper Cretaceous Kirtland Formation (De-Na-Zin member_), San Juan Basin, New Mexico" (PDF). NMMNH Bulletin. 35: 253–256.
Sullivan, Robert M.; Fowler, Denver W. (2011). "Navajodactylus boerei, n. gen., n. sp., (Pterosauria, ?Azhdarchidae) from the Upper Cretaceous Kirtland Formation (upper Campanian) of New Mexico" (PDF). Fossil Record 3. New Mexico Museum of Natural History and Science, Bulletin. 53: 393–404.
Sullivan, R.M.; Lucas, S.G. (2006). "The Kirtlandian land-vertebrate "age" – faunal composition, temporal position and biostratigraphic correlation in the nonmarine Upper Cretaceous of western North America". New Mexico Museum of Natural History and Science Bulletin. 35: 7–29. Retrieved 14 September 2021.
Sullivan, R.M.; Lucas, S.G. (2015). "Cretaceous Vertebrates of New Mexico". New Mexico Museum of Natural History and Science Bulletin. 68: 97–129.
Sullivan, R.S.; Williamson, T.E. (1999). "A new skull of Parasaurolophus (Dinosauria: Hadrosauridae) from the Kirtland Formation of New Mexico and a revision of the genus" (PDF). New Mexico Museum of Natural History and Science Bulletin. 15: 1–52.
Weishampel, David B.; Dodson, Peter; Osmólska, Halszka, eds. (2004). The Dinosauria (2nd ed.). Berkeley: University of California Press. ISBN 0-520-24209-2.

Kata Kunci Pencarian:

• Pentaceratops
• Kirtland Formation
• Kirtland
• Ojo Alamo Formation
• Fruitland Formation
• Bisti/De-Na-Zin Wilderness
• Titanoceratops
• Pentaceratops
• List of North American dinosaurs
• Alamosaurus
• Parasaurolophus