Red Fleet Reservoir tracksite, unit D: Pliensbachian - Toarcian, Utah
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Theropoda
- Grallatoridae
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Eubrontes sp.
Hitchcock 1845
|
1 individual | |||||||||
| 13 tracks in trackway | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Utah | County: | Uintah |
| Coordinates: | 40.6° North, 109.4° West (view map) | ||||
| Paleocoordinates: | 27.6° North, 46.7° West | ||||
| Basis of coordinate: | stated in text | ||||
| Altitude: | 1742 meters | ||||
| Geographic resolution: | small collection |
Time
| Period: | Jurassic | Epoch: | Early/Lower Jurassic |
| Key time interval: | Pliensbachian - Toarcian | ||
| Age range of interval: | 192.90000 - 174.70000 m.y. ago |
Stratigraphy
| Geological group: | Glen Canyon | Formation: | Navajo Sandstone | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: approx. 80 m below top of formation
Navajo Sandstone forms uppermost part of Glen Canyon Group, and is Early Jurassic, but probably not older than Pliensbachian (Irmis 2005. A review of the vertebrate fauna of the Lower Jurassic Navajo Sandstone in Arizona. Mesa Southwest Museum Bulletin 11:55–71) | |||||
Lithology and environment
| Primary lithology: | brown sandstone |
| Secondary lithology: | red calcareous sandstone |
| Includes fossils? | Y |
| Lithology description: "layers of sandstone and calcareous sandstone. These are alternating, sometimes very thin layers of pale brown (5YR5/1) and very pale orange (10YR8/2) with the brown tending to be more sandy and the orange more calcareous." | |
| Environment: | eolian indet. |
| Geology comments: "ephemeral playa lake" | |
Taphonomy
| Modes of preservation: | mold/impression,trace |
| Degree of concentration: | -single event |
| Size of fossils: | macrofossils |
| Spatial orientation: | life position |
| Preservation of anatomical detail: | medium |
| Associated major elements: | some |
| Disassociated major elements: | some |
| Temporal resolution: | snapshot |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | observed (not collected) |
| Reason for describing collection: | general faunal/floral analysis |
Metadata
| Database number: | 49589 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | R. Butler | Research group: | vertebrate |
| Created: | 2005-04-20 06:52:33 | Last modified: | 2012-12-12 07:59:53 |
| Access level: | the public | Released: | 2005-04-20 06:52:33 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 13278. | ETE | A. H. Hamblin and S. A. Bilbey. 1999. A dinosaur track site in the Navajo-Nugget Sandstone, Red Fleet Reservoir, Uintah County, Utah. In D. D. Gillette (ed.), Vertebrate Paleontology in Utah, Utah Geological Survey Miscellaneous Publication 99-1:51-57 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
| 15378 | ETE | A. H. Hamblin, S. A. Bilbey, and J. E. Hall. 2000. Prehistoric animal tracks at Red Fleet State Park, northeastern Utah. D. A. Sprinkel, T. C. Chidsey, Jr., & P. B. Anderson (eds.), Geology of Utah's Parks and Monuments: 2000 Utah Geological Association Publication 28:1-10 [M. Carrano/K. Maguire/M. Carrano] |