Cifelli #2 Eolambia caroljonesa Quarry (20.2): Early/Lower Cenomanian, Utah
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Actinopteri
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Neopterygii indet.
Regan 1923
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Garrison et al. 2007 | 72 elements | ||||||||
Actinopteri
- Lepisosteiformes
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cf. Lepidotes sp.
Agassiz 1832
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Garrison et al. 2007 | 4 elements | ||||||||
Actinopteri
- Lepisosteiformes
- Lepisosteidae
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Lepisosteus sp.
Agassiz 1843
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Garrison et al. 2007 | |||||||||
Actinopteri
- Pycnodontiformes
- Pycnodontidae
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? Pycnodontidae indet.
(Agassiz 1833)
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Garrison et al. 2007 | 1 element | ||||||||
Amphibia
- Temnospondyli
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Caudata indet.
Scopoli 1777
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Garrison et al. 2007 | 2 elements | ||||||||
Reptilia
- Dinosauria
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Dinosauria indet.
Owen 1842
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Garrison et al. 2007 | 3 fragments | ||||||||
eggshell | ||||||||||
Reptilia
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Eolambia sp.
Kirkland 1998
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8 individuals | |||||||||
(9 measurements) | ||||||||||
= Eolambia caroljonesa
Kirkland 1998
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Garrison et al. 2007 | |||||||||
Reptilia
- Hypsilophodontidae
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Hypsilophodontidae indet.
Dollo 1882
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Garrison et al. 2007 | 1 element | ||||||||
Reptilia
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Atoposauridae indet.
(Gervais 1871)
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Garrison et al. 2007 | 3 elements | ||||||||
= Mesoeucrocodylia indet.
Whetstone and Whybrow 1983
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Tennant et al. 2016 | |||||||||
Reptilia
- Pholidosauridae
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Pholidosauridae indet.
von Zittel and Eastman 1902
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Garrison et al. 2007 | 2 elements | ||||||||
Reptilia
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Eusuchia indet.
Huxley 1875
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Garrison et al. 2007 | 10 elements | ||||||||
Bernissartia informal sp. 1
Dollo 1883
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Garrison et al. 2007 | 6 elements | ||||||||
Bernissartia informal sp. 2
Dollo 1883
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Garrison et al. 2007 | 1 element | ||||||||
Testudinata indet.
(Oppel 1811)
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Mammalia
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Mammalia indet.
Linnaeus 1758
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Garrison et al. 2007 | 1 element | ||||||||
see common names |
Geography
Country: | United States | State/province: | Utah | County: | Emery |
Coordinates: | 38.7° North, 111.3° West (view map) | ||||
Paleocoordinates: | 40.0° North, 73.4° West | ||||
Basis of coordinate: | stated in text | ||||
Geographic resolution: | small collection |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
Key time interval: | Early/Lower Cenomanian | ||
Age range of interval: | 100.50000 - 93.90000 m.y. ago |
Stratigraphy
Geological group: | Dakota | Formation: | Cedar Mountain | Member: | Mussentuchit |
Local section: | Cifelli-2 | Local bed: | 20.2 m | ||
Local order: | bottom to top | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: A radiometric age of 98.37 ± 0.07 Ma was obtained by the OMNH from volcanic ash within the Mussentuchit Member (Cifelli and others, 1997, 1999). Additional ages by Garrison and others (2007) ranging from 96.7 ± 0.5 to 98.2 ±0.6 Ma indicate that the Mussentuchit Member was deposited over an interval of 1.5 Ma during the early Cenomanian and supports a correlation with the siliceous marine Mowry Shale to the north, which is well-constrained from 40Ar/39Ar sanidine ages obtained from bentonite beds that bracket the Mowry in Wyoming; the basal Arrow Creek Bentonite is 98.5 ± 0.5 Ma and the capping Clay Spur Bentonite is 97.2 ± 0.7 Ma (Obradovich, 1993; Ogg and Hinnov, 2012; Sprinkel and others, 2012) near the base of the Upper Cretaceous. Tucker et al. 2020 also suggested a likely depositional age of ~96-94Ma for the Musseuntuchit member. |
Lithology and environment
Primary lithology: | volcaniclastic,gray,yellow claystone |
Includes fossils? | Y |
Lithology description: "light gray yellow bentonite" | |
Environment: | lacustrine indet. |
Glacial or sequence phase: | transgressive systems tract |
Geology comments: a "mudflat-transgressive lag deposition system" with local conditions suggestive of lacustrine final deposition as a regressive lag |
Taphonomy
Modes of preservation: | body,replaced with calcite,replaced with silica,replaced with pyrite |
Degree of concentration: | concentrated |
Size of fossils: | macrofossils,mesofossils |
Spatial orientation: | preferred |
Preservation of anatomical detail: | good |
Associated major elements: | some |
Disassociated major elements: | some |
Disassociated minor elements: | some |
Fragmentation: | occasional |
Bioerosion: | occasional |
Feeding/predation traces: | fractures |
Collection methods and comments
Collection methods: | selective quarrying,surface (in situ),mechanical,field collection |
Reason for describing collection: | taphonomic analysis |
Metadata
Also known as: | CEUM locality 42em432v, Eo2, Eolambia II | ||
Database number: | 73611 | ||
Authorizer: | M. Carrano, P. Mannion | Enterer: | M. Carrano, P. Mannion |
Modifier: | M. Carrano | Research group: | vertebrate |
Created: | 2007-06-21 12:55:53 | Last modified: | 2022-09-21 12:22:12 |
Access level: | the public | Released: | 2007-06-21 12:55:53 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
82643. | J. H. Bird, D. Burge, and M. Cicconetti. 2002. An analysis of disarticulated juvenile Eolambia bones in the Cedar Mountain Formation of eastern Utah. Journal of Vertebrate Paleontology 22(3 (suppl.)):37A [M. Carrano/M. Carrano] |
Secondary references:
24682 | ETE | J. R. Garrison, Jr., D. B. Brinkman, D. J. Nichols, P. Layer, D. L. Burge and D. Thayn. 2007. A multidisciplinary study of the Lower Cretaceous Cedar Mountain Formation, Mussentuchit Wash, Utah: a determination of the paleoenvironment and paleoecology of the Eolambia caroljonesa dinosaur quarry. Cretaceous Research 28:461-494 [M. Carrano/M. Carrano] |
78573 | A. T. McDonald, J. Bird, J. I. Kirkland and P. Dodson. 2012. Osteology of the basal hadrosauroid Eolambia caroljonesa (Dinosauria: Ornithopoda) from the Cedar Mountain Formation of Utah. PLoS One 7(10):e45712:1-38 [M. Carrano/M. Carrano] | |
59838 | J. P. Tennant, P. D. Mannion, and P. Upchurch. 2016. Evolutionary relationships and systematics of Atoposauridae (Crocodylomorpha: Neosuchia): implications for the rise of Eusuchia. Zoological Journal of the Linnean Society 177:854-936 [P. Mannion/P. Mannion] |