Conant Creek, Lander: Early/Lower Cenomanian, Wyoming
collected by S. Williston 1900
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Plesiosauria
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Plesiosauria indet.
de Blainville 1835
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Reptilia
- Plesiosauria
- Polycotylidae
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Polycotylus sp.
Cope 1869
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Reptilia
- Nodosauridae
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Stegopelta landerensis n. gen., n. sp.
Williston 1905
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Moodie 1910 | 1 individual | ||||||||
| FMNH UR88 (3 measurements) | ||||||||||
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Reptilia
- Teleosauridae
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Teleosauridae indet.
Geoffroy 1831
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Bivalvia
- Ostreida
- Ostreidae
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Ostrea sp.
Linnaeus 1758
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Bivalvia
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Pelecypoda indet.
Goldfuss 1820
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| synonym of Bivalvia | ||||||||||
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Gastropoda
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Gastropoda indet.
Cuvier 1795
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Wyoming | County: | Fremont |
| Coordinates: | 42.8° North, 108.0° West (view map) | ||||
| Paleocoordinates: | 43.2° North, 68.7° West | ||||
| Basis of coordinate: | stated in text | ||||
| Altitude: | 1789 meters | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
| *Period: | Early/Lower Cretaceous - Late/Upper Cretaceous | ||
| *International age/stage: | Late/Upper Albian - Early/Lower Cenomanian, Conant Crek, WY | ||
| Key time interval: | Early/Lower Cenomanian | ||
| Age range of interval: | 100.50000 - 93.90000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Frontier | Member: | Belle Fourche | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: lower part of member; originally described as the "Hailey Shale" Formation
The lower unit is of Early Cenomanian age, whereas the upper unit is of Late Cenomanian age (Bloch et al., 1993). | |||||
Lithology and environment
| Primary lithology: | blue "shale" |
| Secondary lithology: | brown sandy claystone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "the lowest beds are several hundred feet of dark-colored shale, usually containing toward the base a deposit of sandstone from 2 to 20 feet thick...In most of their extent the Hailey beds have numerous brown sandy clay concretions which very often contain vertebrate remains. These concretions vary in size from a few inches to many feet in diameter...[and often are] stratified into distinct layers...remains described herein were once encased in one of the brown sandy clay concretions so abundant in this formation." | |
| Environment: | estuary/bay |
| Geology comments: Beds "plainly show littoral and river disturbances...the invertebrates are of a fresh-water or brackish-water facies." | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
| Preservation of anatomical detail: | medium |
| Associated major elements: | many |
| Disassociated major elements: | many |
| Disassociated minor elements: | some |
| Fragmentation: | extreme |
| Temporal resolution: | snapshot |
| Spatial resolution: | allochthonous |
Collection methods and comments
| Collection methods: | surface (float),mechanical,field collection,survey of museum collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | FMNH | ||
| Collectors: | S. Williston | Collection dates: | 1900s |
Metadata
| Also known as: | Stegopelta type | ||
| Database number: | 27889 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2003-01-15 12:55:26 | Last modified: | 2022-01-31 06:17:17 |
| Access level: | the public | Released: | 2003-01-15 12:55:26 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 7646. | S. W. Williston. 1905. A new armored dinosaur from the Upper Cretaceous of Wyoming. Science 22(564):503 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
| 64040 | V. M. Arbour and P. J. Currie. 2016. Systematics, phylogeny and palaeobiogeography of the ankylosaurid dinosaurs. Journal of Systematic Palaeontology 14(5):385-444 [G. Lloyd/G. Lloyd/M. Carrano] | |
| 7836 | K. Carpenter and J. I. Kirkland. 1998. Review of Lower and middle Cretaceous ankylosaurs from North America. 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 14:249-270 [M. Carrano/M. Carrano/M. Carrano] | |
| 62949 | E. Hennig. 1915. Fossilium Catalogus. I: Animalia. Pars 9: Stegosauria 1-16 [M. Carrano/M. Carrano/M. Carrano] | |
| 7645 | R. L. Moodie. 1910. An armored dinosaur from the Cretaceous of Wyoming. The Kansas University Science Bulletin 5(14):257-273 [M. Carrano/M. Carrano/M. Carrano] | |
| 69430 | R. L. Moodie. 1930. The Dinosaurs of Wyoming 22:1-119 [M. Carrano/M. Carrano] | |
| 13950 | ETE | J. H. Ostrom. 1965. Cretaceous vertebrate faunas of Wyoming. Wyoming Geological Association Guidebook 19:35-41 [M. Carrano/K. Maguire/M. Carrano] |