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Dalton Wells Quarry, Grand County, Utah, USA

Lat/Long (Decimal)	38.7181,-109.692
Co-ordinates Derivation	estimated from map
Given Location	Utah, United States
Mindat.org Region (for given coordinates)	Grand County, Utah, USA

Collections

Collection	Reference	Stratigraphic Name	Comments	Lithology	Age
Dalton Wells Quarry, BYU Loc. 7510	Britt B. B., Stadtman K. L., et al (1996)	Dakota - Cedar Mountain - Yellow Cat	stacked succession of 4 bonebeds below footprint level, and approx. 2 m above base of member in this area Detrital zircons from the quarry and adjacent, lateral equivalents provide a maximum depositional age of 125 Ma, indicating the horizon is no older than early Albian (Eberth et al., 2006)	mudstone	125.45 - 122.46 Ma Early/Lower Cretaceous

Recorded Fossils

Accepted Name	Hierarchy	Age
Coleoptera order	Animalia : Arthropoda : Insecta : Coleoptera	125.45 - 122.46 Ma Early/Lower Cretaceous
Iguanodontidae family	Animalia : Chordata : Ornithischia : Iguanodontidae	125.45 - 122.46 Ma Early/Lower Cretaceous
Gastonia burgei species	Animalia : Chordata : Ornithischia : Nodosauridae : Gastonia : *Gastonia burgei*	125.45 - 122.46 Ma Early/Lower Cretaceous
Iguanodontia unranked clade	Animalia : Chordata : Ornithischia : Fulgurotherium : Iguanodontia	125.45 - 122.46 Ma Early/Lower Cretaceous
Neochoristodera suborder	Animalia : Chordata : Reptilia : Choristodera : Neochoristodera	125.45 - 122.46 Ma Early/Lower Cretaceous
Crocodylidae family	Animalia : Chordata : Reptilia : Crocodylia : Crocodylidae	125.45 - 122.46 Ma Early/Lower Cretaceous
Ornithodira unranked clade	Animalia : Chordata : Reptilia : Eosuchia : Ornithodira	125.45 - 122.46 Ma Early/Lower Cretaceous
Testudines order	Animalia : Chordata : Reptilia : Testudines	125.45 - 122.46 Ma Early/Lower Cretaceous
Ornithomimosauria infraorder	Animalia : Chordata : Saurischia : Avetheropoda : Coelosaurus : Ornithomimosauria	125.45 - 122.46 Ma Early/Lower Cretaceous
Utahraptor ostrommaysi species	Animalia : Chordata : Reptilia : Dinosauria : Dromaeosauridae : Utahraptor : *Utahraptor ostrommaysi*	125.45 - 122.46 Ma Early/Lower Cretaceous
Nedcolbertia justinhoffmanni species	Animalia : Chordata : Saurischia : Avetheropoda : Nedcolbertia : *Nedcolbertia justinhoffmanni*	125.45 - 122.46 Ma Early/Lower Cretaceous
Brachiosauridae family	Animalia : Chordata : Reptilia : Dinosauria : Brachiosauridae	125.45 - 122.46 Ma Early/Lower Cretaceous
Macronaria unranked clade	Animalia : Chordata : Saurischia : Astrodon : Macronaria	125.45 - 122.46 Ma Early/Lower Cretaceous
Moabosaurus utahensis species	Animalia : Chordata : Reptilia : Dinosauria : Moabosaurus : *Moabosaurus utahensis*	125.45 - 122.46 Ma Early/Lower Cretaceous
Sauropoda unranked clade	Animalia : Chordata : Saurischia : Sauropoda	125.45 - 122.46 Ma Early/Lower Cretaceous

References

Galton P. M., Jensen J. A. (1979) Remains of ornithopod dinosaurs from the Lower Cretaceous of North America, Brigham Young University Geology Studies 25 3, 1-10

Britt B. B., Stadtman K. L., et al (1996) The Early Cretaceous Dalton Wells dinosaur fauna and the earliest North American titanosaurid sauropod, Journal of Vertebrate Paleontology 16 3, suppl., 24A

Kirkland J. I., Britt B. B., et al (1998) A small coelurosaurian theropod from the Yellow Cat Member of the Cedar Mountain Formation (Lower Cretaceous, Barremian) of eastern Utah, Lower and Middle Cretaceous Terrestrial Ecosystems, New Mexico Museum of Natural History and Science Bulletin 14, 239-248

Kirkland J. I. (1998) A polacanthine ankylosaur (Ornithischia: Dinosauria) from the Early Cretaceous (Barremian) of eastern Utah, Lower and Middle Cretaceous Terrestrial Ecosystems (S. G. Lucas, J. I. Kirkland, & J. W. Estep, eds.), New Mexico Museum of Natural History and Science Bulletin 14, 271-281

Britt B. B., Eberth D. A., et al (2004) Taphonomy of the Dalton Wells Dinosaur Quarry (Cedar Mountain Formation, Lower Cretaceous, Utah), Journal of Vertebrate Paleontology 24 3, suppl., 41A

Nolte M. J., Greenhalgh B. W., et al (2004) Invertebrate burrows on dinosaur bones from the Lower Cretaceous Cedar Mountain Formation near Moab, Utah, U.S.A., Geological Society of America Abstracts with Programs 36 5, 379

Eberth D. A., Britt B. B., et al (2006) Dalton Wells: geology and significance of debris-flow-hosted dinosaur bonebeds in the Cedar Mountain Formation (Lower Cretaceous) of eastern Utah, USA, Palaeogeography, Palaeoclimatology, Palaeoecology 236, 217-245

Britt B. B., Scheetz R. D., et al (2006) A Barremian neochoristodere from the Cedar Mountain Formation, Utah, U.S.A., Journal of Vertebrate Paleontology 26 4, 1005-1008

Britt B. B., Eberth D. A., et al (2009) Taphonomy of debris-flow hosted dinosaur bonebeds at Dalton Wells, Utah (Lower Cretaceous, Cedar Mountain Formation, USA), Palaeogeography, Palaeoclimatology, Palaeoecology 280, 1-22 doi:10.1016/j.palaeo.2009.06.004

Britt B. B., Scheetz R. D., et al (2017) Moabosaurus utahensis, n. gen., n. sp., a new sauropod from the Early Cretaceous (Aptian) of North America, Contributions from the Museum of Paleontology, University of Michigan 32 11, 189-243

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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