AMNH 33-1, Middle Dome: Middle Albian - Early/Lower Cenomanian, Montana
collected by B. Brown 1933
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Dromaeosauridae
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Deinonychus antirrhopus
Ostrom 1969
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| numerous teeth | ||||||||||
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Reptilia
- Caenagnathidae
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Microvenator celer n. gen., n. sp.
Ostrom 1970
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1 individual | |||||||||
| AMNH 3041 (4 measurements) | ||||||||||
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Reptilia
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Tenontosaurus tilletti n. gen., n. sp.
Ostrom 1970
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1 individual | |||||||||
| AMNH 3040 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Montana | County: | Wheatland |
| Coordinates: | 46.3° North, 109.7° West (view map) | ||||
| Paleocoordinates: | 45.9° North, 66.9° West | ||||
| Basis of coordinate: | stated in text | ||||
| Altitude: | 1355 meters | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous |
| Key time interval: | Middle Albian - Early/Lower Cenomanian |
| Age range of interval: | 109.90000 - 93.90000 m.y. ago |
Stratigraphy
| Formation: | Cloverly | Member: | Himes | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: questionable stratigraphic assignment; = Ostrom's Unit VII, fossils from approx. 60 ft below base of Unit VIII
D'Emic et al. 2019: New data reported in this study suggest that deposition of the Cloverly Formation spanned the Valanginian–Cenomanian stages (ca. 140 Ma–98 Ma), a longer time interval than the commonly cited Aptian–Albian depositional timeframe. In the mid–late Albian to early Cenomanian (ca. 109–98 Ma), sediment sourced from the east was deposited as the Himes Member and Greybull Sandstone. | |||||
Lithology and environment
| Primary lithology: | claystone |
| Includes fossils? | Y |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
| Preservation of anatomical detail: | good |
| Associated major elements: | many |
| Disassociated major elements: | some |
| Disassociated minor elements: | some |
Collection methods and comments
| Collection methods: | selective quarrying,mechanical,field collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | AMNH | ||
| Collectors: | B. Brown | Collection dates: | 1933 |
Metadata
| Also known as: | Tenontosaurus type site, AMNH 3040 | ||
| Database number: | 47346 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2005-02-23 07:28:11 | Last modified: | 2022-03-08 06:40:11 |
| Access level: | the public | Released: | 2005-02-23 07:28:11 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 13525. | ETE | J. H. Ostrom. 1970. Stratigraphy and paleontology of the Cloverly Formation (Lower Cretaceous) of the Bighorn Basin area, Wyoming and Montana. Peabody Museum Bulletin 35:1-234 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
| 79303 | M. D. D’Emic, B. Z. Foreman, N. A. Jud, B. B. Britt, M. Schmitz and J. L. Crowley. 2019. Chronostratigraphic Revision of the Cloverly Formation (Lower Cretaceous, Western Interior, USA). Bulletin of the Peabody Museum of Natural History 60(1):3-40 [P. Mannion/G. Varnham/G. Varnham] | |
| 7478 | P. M. Galton and J. A. Jensen. 1979. Remains of ornithopod dinosaurs from the Lower Cretaceous of North America. Brigham Young University Geology Studies 25(3):1-10 [M. Carrano/M. Carrano/M. Carrano] | |
| 18117 | ETE | P. J. Makovicky and H.-D. Sues. 1998. Anatomy and phylogenetic relationships of the theropod dinosaur Microvenator celer from the Lower Cretaceous of Montana. American Museum Novitates 3240:1-27 [M. Carrano/M. Carrano] |
| 16613 | ETE | D. J. Varricchio. 2001. Late Cretaceous oviraptorosaur (Theropoda) dinosaurs from Montana. D. H. Tanke and K. Carpenter (eds.), Mesozoic Vertebrate Life, Indiana University Press, Bloomington 42-57 [M. Carrano/M. Carrano] |