PTRM V95020, Cannonball Creek: Late/Upper Maastrichtian, North Dakota
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Amphibia
- Temnospondyli
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Caudata indet.
Scopoli 1777
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1 specimen | ||||||
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Reptilia
- Ceratopsidae
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Ceratopsidae indet.
Marsh 1888
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7 specimens | ||||||
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Reptilia
- Hadrosauridae
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Hadrosaurinae indet.
Lambe 1918
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1 specimen | ||||||
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Reptilia
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Brachychampsa montana
Gilmore 1911
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1 specimen | ||||||
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Leidyosuchus sternbergi
(Gilmore 1910)
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3 specimens | ||||||
| recombined as Borealosuchus sternbergii | |||||||
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Reptilia
- Testudines
- Trionychidae
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Trionychidae indet.
Gray 1825
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1 specimen | ||||||
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Reptilia
- Testudines
- Adocidae
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Adocus sp.
Cope 1868
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1 specimen | ||||||
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Reptilia
- Testudines
- Chelydridae
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Chelydridae indet.
Swainson 1839
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1 specimen | ||||||
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Reptilia
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Compsemys victa
(Leidy 1856)
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1 specimen | ||||||
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Actinopteri
- Aspidorhynchiformes
- Aspidorhynchidae
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Belonostomus longirostris
(Lambe 1902)
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2 specimens | ||||||
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Actinopteri
- Amiiformes
- Amiidae
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Kindleia fragosa
Jordan 1927
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5 specimens | ||||||
| recombined as Cyclurus fragosus | |||||||
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Melvius thomasi
Bryant 1987
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3 specimens | ||||||
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Actinopteri
- Lepisosteiformes
- Lepisosteidae
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Lepisosteus occidentalis
(Leidy 1856)
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4 specimens | ||||||
| original and current combination Lepidotus occidentalis | |||||||
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Chondrichthyes
- Hybodontiformes
- Lonchidiidae
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Lissodus selachos
(Estes 1964)
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1 specimen | ||||||
| original and current combination Lonchidion selachos | |||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | North Dakota | County: | Slope |
| Coordinates: | 46.5° North, 104.0° West (view map) | ||||
| Paleocoordinates: | 52.7° North, 77.4° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Altitude: | 853 meters | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Late/Upper Maastrichtian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago |
Stratigraphy
| Formation: | Hell Creek | ||||
| Local section: | Cannonball Creek | Local bed: | 5.50 m | ||
| Local order: | top to bottom | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: datum -5.50, K-T section 9653 | |||||
Lithology and environment
| Primary lithology: | silty mudstone |
| Includes fossils? | Y |
| Environment: | "channel" |
Taphonomy
| Modes of preservation: | body |
| Degree of concentration: | concentrated |
| Size of fossils: | macrofossils,mesofossils |
| Disassociated major elements: | many |
| Disassociated minor elements: | many |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 45143 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2004-10-07 13:05:35 | Last modified: | 2022-02-01 07:42:23 |
| Access level: | the public | Released: | 2004-10-07 13:05:35 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 11749. | ETE | D. A. Pearson, T. Schaefer, K. R. Johnson, D. J. Nichols, and J. P. Hunter. 2002. Vertebrate biostratigraphy of the Hell Creek Formation in southwestern North Dakota and northwestern South Dakota. In J. H. Hartman, J. R. Johnson, and D. J. Nichols (eds.), The Hell Creek Formation and the Cretaceous-Tertiary Boundary in the Northern Great Plains: An Integrated Continental Record of the End of the Cretaceous, Geological Society of America Special Paper 361:145-167 [M. Carrano/M. Carrano/M. Carrano] |