Cedar Mesa Road, East of Cedaredge: Middle Campanian, Colorado
collected by J. A. Jensen 1979
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Baculitidae
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Baculites haresi
(Reeside 1927)
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Baculites aquilaensis
Reeside 1927
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Bivalvia
- Myalinida
- Inoceramidae
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Platyceramus cycloides
(Wegner 1905)
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Endocostea (Inoceramus) balticus
Bohm 1907
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| E. (Inoceramus) | ||||||||||
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Reptilia
- Mosasauridae
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Prognathodon stadtmani n. sp.
Kass 1999
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| recombined as Gnathomortis stadtmani | ||||||||||
| type specimen | ||||||||||
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Chondrichthyes
- Lamniformes
- Otodontidae
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Cretolamna sp.
Glikman 1958
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Chondrichthyes
- Lamniformes
- Anacoracidae
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Squalicorax pristodontus
(Agassiz 1835)
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Colorado | County: | Delta |
| Coordinates: | 38.9° North, 107.9° West (view map) | ||||
| Paleocoordinates: | 46.0° North, 78.2° West | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Campanian | 10 m.y. bin: | Cretaceous 7 |
| *Period: | Late/Upper Cretaceous | *Epoch: | Senonian |
| *International age/stage: | Early/Lower Campanian | ||
| Key time interval: | Middle Campanian | Zone: | Scaphites hippocrepis |
| Age range of interval: | 83.60000 - 72.10000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Mancos Shale | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Lower middle Campanian | |||||
Lithology and environment
| Primary lithology: | gray argillaceous,calcareous siltstone |
| Includes fossils? | Y |
| Lithology description: thinly laminated, dark gray siltstone | |
| Environment: | offshore |
| Geology comments: "off-shore deposit in relatively deep, quiet water... open marine shelf" "Numerous casts and internal molds of bivalves... calcareous concretions containing [ammonites]" plus shark teeth and mosasaur skeleton | |
Taphonomy
| Modes of preservation: | body,cast,concretion |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Collectors: | J. A. Jensen | Collection dates: | 1979 |
| Collection method comments: all material was found in association with a mosasaur skeleton | |||
Metadata
| Database number: | 5607 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | P. Mannion | Research group: | marine invertebrate |
| Created: | 1999-10-31 14:07:43 | Last modified: | 2020-10-02 10:19:30 |
| Access level: | the public | Released: | 1999-10-31 14:07:43 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 338. | M. S. Kass. 1999. Prognathodon stadtmani: (Mosasauridae) a new species from the Mancos Shale (Lower Campanian) of western Colorado. Utah Geological Survey Miscellaneous Publication 99-1:275-294 [J. Alroy/J. Alroy/M. Uhen] |
Secondary references:
| 73873 | J. R. Lively. 2020. Redescription and phylogenetic assessment of ‘Prognathodon’ stadtmani: implications for Globidensini monophyly and character homology in Mosasaurinae. Journal of Vertebrate Paleontology 40(3):e1784183 [M. Uhen/M. Uhen/P. Mannion] |