North Grapevine Hills (80 m), Big Bend N.P.: Late/Upper Maastrichtian, Texas
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Saltasauridae
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Alamosaurus sp.
Gilmore 1922
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= Alamosaurus sanjuanensis
Gilmore 1922
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Lehman and Coulson 2002 | ||||||
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Reptilia
- Ceratopsidae
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Ceratopsidae indet.
Marsh 1888
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Lehman and Coulson 2002 | ||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Texas | County: | Brewster |
| Coordinates: | 29.4° North, 103.2° West (view map) | ||||
| Paleocoordinates: | 36.0° North, 82.5° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| 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: | Javelina | ||||
| Local section: | Grapevine Hills | Local bed: | 80 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: located a few meters below a tuff dated as 69.0 ± 0.9 Ma (U-Pb) (late Edmontonian to Lancian NALMA) | |||||
Lithology and environment
| Primary lithology: | mudstone |
| Includes fossils? | Y |
| Environment: | fluvial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Fragmentation: | occasional |
Collection methods and comments
| Collection excludes: | some macrofossils,some microfossils,difficult macrofossils |
| Collection methods: | selective quarrying,surface (float),surface (in situ),mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | TMM |
Metadata
| Database number: | 52091 | ||
| Authorizer: | M. Carrano | Enterer: | K. Maguire, M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2005-07-21 12:33:40 | Last modified: | 2023-08-04 13:29:49 |
| Access level: | the public | Released: | 2005-07-21 12:33:40 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 85562. | T. M. Lehman. 1985. Stratigraphy, Sedimentology, and Paleontology of Upper Cretaceous (Campanian–Maastrichtian) Sedimentary Rocks in Trans-Pecos Texas xiv-299 [M. Carrano/M. Carrano] |
Secondary references:
| 13959 | ETE | T. M. Lehman and A. B. Coulson. 2002. A juvenile specimen of the sauropod dinosaur Alamosaurus sanjuanensis from the Upper Cretaceous of Big Bend National Park, Texas. Journal of Paleontology 76(1):156-172 [M. Carrano/K. Maguire/M. Carrano] |
| 19485 | ETE | T. M. Lehman, F. W. McDowell, and J. N. Connelly. 2006. First isotopic (U-Pb) age for the Late Cretaceous Alamosaurus vertebrate fauna of west Texas, and its significance as a link between two faunal provinces. Journal of Vertebrate Paleontology 26(4):922-928 [M. Carrano/M. Carrano] |