Amaral site, Big Bend National Park: Late/Upper Maastrichtian, Texas
collected by W. Langston, Jr.
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Pterosauria
- Azhdarchidae
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Quetzalcoatlus sp.
Lawson 1975
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200 elements | pterosaur |
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| More than 200 bones including four partial skulls (TMM 41961-1, 41954-62, 42161-1, 42422-30) and mandibles (TMM 41961-1, 41544-14/22, 41954-5, 42161-2). Probably represents a new taxon | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Texas | County: | Brewster |
| Coordinates: | 29.3° North, 103.3° West (view map) | ||||
| Paleocoordinates: | 35.9° North, 82.6° West | ||||
| Basis of coordinate: | based on nearby landmark |
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: | 70.6 - 65.5 m.y. ago |
Stratigraphy
| Formation: | Javelina | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: "Bones occur in several concentrations, which are very closely spaced stratigraphically, if not on a single horizon" | |||||
Lithology and environment
| Primary lithology: | gray,green siltstone |
| Secondary lithology: | green,yellow claystone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "The surrounding matrix consisted of gray-green siltstone and green to yellow claystone and shale" | |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
| Associated major elements: | all |
| Disassociated major elements: | some |
| Fragmentation: | occasional |
Collection methods and comments
| Collection methods: | field collection,chemical,mechanical |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | TMM |
| Collectors: | W. Langston, Jr. |
Metadata
| Database number: | 92247 | ||
| Authorizer: | R. Butler | Enterer: | R. Butler |
| Modifier: | R. Butler | Research group: | vertebrate |
| Created: | 2009-11-04 06:44:49 | Last modified: | 2009-11-04 08:49:17 |
| Access level: | the public | Released: | 2009-11-04 06:44:49 |
Reference information
Primary reference:
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