La Sal Creek tracksite: Rhaetian - Hettangian, Colorado
collected by C. Bunker & Martin
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Theropoda
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Theropoda indet.
Marsh 1881
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| similar to Grallator tracks, "except shorter in length" | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Colorado | County: | Montrose |
| Coordinates: | 38.3° North, 108.9° West (view map) | ||||
| Paleocoordinates: | 12.9° North, 37.9° West (Wright 2013) | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Triassic - Jurassic | Epoch: | Late Triassic - Early Jurassic |
| Stage: | Rhaetian - Hettangian | 10 m.y. bin: | Triassic 4 - Jurassic 1 |
| *Period: | Early/Lower Jurassic | *Epoch: | Lias |
| Key time interval: | Rhaetian - Hettangian | ||
| Age range of interval: | 208.5 - 199.5 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Glen Canyon | Formation: | Wingate Sandstone | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Footprints found approximately 40 feet above the base of the Wingate Formation (approximately 330 feet thick here). Wingate traditionally identified as Early Jurassic in age; however, Lucas et al. (2011: Palaeo3 302: 194-205) have argued that the lower part of the Wingate is latest Triassic in age. Because the position of the boundary relative to this locality is unclear, it is assigned a Rhaetian–Hettangian age. | |||||
Lithology and environment
| Primary lithology: | desiccation cracks,current ripples mudstone |
| Includes fossils? | Y |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | trace |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | general faunal/floral analysis |
| Collectors: | C. Bunker & Martin |
Metadata
| Database number: | 13263 | ||
| Authorizer: | J. Alroy | Enterer: | R. Whatley |
| Modifier: | R. Butler | Research group: | vertebrate |
| Created: | 2002-02-05 14:24:44 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2002-02-05 14:24:44 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 4395. | 5% 36960 | C. M. Bunker. 1957. Theropod saurischian footprint discovery in the Wingate (Triassic) Formation. Journal of Paleontology 31(5):973 [J. Alroy/R. Whatley/M. Carrano] |