Black Dragon Canyon nest: Maastrichtian, Utah
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Prismatoolithidae
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Prismatoolithus sp.
Zhao and Li 1993
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1 individual | |||||||||
| nest with 13 eggs, attributed to a troodontid | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Utah | County: | Emery |
| Coordinates: | 38.9° North, 110.4° West (view map) | ||||
| Paleocoordinates: | 46.8° North, 86.9° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | local area |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Maastrichtian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago |
Stratigraphy
| Formation: | North Horn | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: "the same stratigraphic level as the Polyglyphanodon type locality, slightly below a nest of Spherurismatoolithus condensus eggs and about the same stratigraphic level as the North Horn Mountain Tyrannosaurus rex locality." | |||||
Lithology and environment
| Primary lithology: | paleosol/pedogenic,gray mudstone |
| Includes fossils? | Y |
| Lithology description: "in a series of paleosols in a mottled grey horizon just below a rooted oxidized horizon." | |
| Environment: | wet floodplain |
| Geology comments: "The paleosols represent weakly developed soild on a vegetated floodplain." | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Spatial orientation: | life position |
| Temporal resolution: | snapshot |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | general faunal/floral analysis |
Metadata
| Database number: | 177458 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano | Research group: | vertebrate |
| Created: | 2016-03-28 16:15:44 | Last modified: | 2016-03-28 16:15:44 |
| Access level: | the public | Released: | 2016-03-28 16:15:44 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 58625. | R. Difley, B. Britt, and P. Policelli. 2004. A troodontid nest in the North Horn Formation, central Utah. Journal of Vertebrate Paleontology 24(3, suppl.):52A [M. Carrano/M. Carrano] |