BCT Quarry, "A" Horizon: Middle Campanian - Late/Upper Campanian, Montana
collected by M. Triebold 2002
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Chondrichthyes
- Rajiformes
- Rhinobatidae
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Myledaphus sp.
Cope 1876
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| Teeth | ||||||||||
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unclassified
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Osteichthyes indet.
(Huxley 1880)
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| vertebrae | ||||||||||
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Reptilia
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Testudinata indet.
(Oppel 1811)
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| shell fragments | ||||||||||
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Reptilia
- Testudines
- Trionychidae
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Trionychidae indet.
(Gray 1825)
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1 specimen | |||||||||
| Braincase | ||||||||||
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Reptilia
- Hypsilophodontidae
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Hypsilophodontidae indet.
Dollo 1882
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1 specimen | |||||||||
| Femur | ||||||||||
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Reptilia
- Hadrosauridae
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Hadrosauridae indet.
Cope 1869
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3 specimens | |||||||||
| Isolated hadrosaur. Ulna, fibula, vertebrae | ||||||||||
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Reptilia
- Dromaeosauridae
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Dromaeosauridae indet.
Colbert and Russell 1969
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| Claws, vertebrae, teeth | ||||||||||
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Reptilia
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Crocodylia indet.
(Owen 1842)
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| Teeth | ||||||||||
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Deinosuchus sp.
Holland 1909
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1 specimen | |||||||||
| Tooth | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Montana | County: | Petroleum |
| Coordinates: | 46.8° North, 108.0° West (view map) | ||||
| Paleocoordinates: | 53.5° North, 74.6° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Campanian | 10 m.y. bin: | Cretaceous 7 |
| Key time interval: | Middle Campanian - Late/Upper Campanian | ||
| Age range of interval: | 83.60000 - 72.10000 m.y. ago |
Stratigraphy
| Geological group: | Montana | Formation: | Judith River |
| Stratigraphic resolution: | bed |
Lithology and environment
| Primary lithology: | medium,brown,red,yellow lithified sandstone |
| Secondary lithology: | concretionary,sideritic,black,brown,red,yellow ironstone |
| Includes fossils? | Y |
| Lithology description: "The 'A' Horizon consisted of a medium orange-brown, highly cemented, medium-grained, lithic-wacke sandstone with abundant, large, irregular, black, orange-brown and red-brown sideritic ironstone concretions." | |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
| Spatial orientation: | random |
| Preservation of anatomical detail: | poor |
| Size sorting: | poor |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | surface (float),surface (in situ),field collection | ||
| Reason for describing collection: | general faunal/floral analysis | ||
| Museum repositories: | AMNH | ||
| Collectors: | M. Triebold | Collection dates: | 2002 |
Metadata
| Also known as: | Salt Sage Coulee | ||
| Database number: | 167800 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2015-04-03 10:30:41 | Last modified: | 2016-05-18 15:44:12 |
| Access level: | the public | Released: | 2015-04-03 10:30:41 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 54849. | W. W. Stein and M. Triebold. 2013. Preliminary analysis of a sub-adult tyrannosaurid skeleton from the Judith River Formation of Petroleum County, Montana. In J. M. Parrish, R. E. Molnar, P. J. Currie, & E. B. Koppelhus (eds.), Tyrannosaurid Paleobiology 54-77 [M. Carrano/M. Carrano/M. Carrano] |