Kolob Canyons: Smithian, Utah
collected 2004-2005
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Chirotheriidae
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Chirotherium sp.
Kaup 1835
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Reptilia
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Rhynchosauroides sp.
Maidwell 1911
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Utah | County: | Washington |
| Coordinates: | 37.4° North, 113.1° West (view map) | ||||
| Paleocoordinates: | 8.1° North, 38.9° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | small collection |
Time
| Period: | Triassic | Epoch: | Early Triassic |
| Stage: | Olenekian | 10 m.y. bin: | Triassic 1 |
| Key time interval: | Smithian | ||
| Age range of interval: | 251.2 - 248.9 m.y. ago |
Stratigraphy
| Formation: | Moenkopi | Member: | lower red | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: The lower red member is a lateral equivalent of the lower part of the Torrey Member of the Moenkopi Formation (Mickelson et al. 2006: table 1).
"In SE Utah, the Torrey Member immediately overlies the Sinbad Limestone, a marine unit that yields Smithian ammonoids...The Virgin Limestone, of early Spathian age, may correlate to the uppermost part of the Torrey Member. Therefore we regard the Torrey as primarily of Smithian age" (Lucas & Schoch 2002: Lethaia 35: 97–106) | |||||
Lithology and environment
| Primary lithology: | gray "shale" |
| Secondary lithology: | fine sandstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Environment: | coastal indet. |
Taphonomy
| Modes of preservation: | trace |
| Size of fossils: | macrofossils |
| Spatial orientation: | life position |
| Temporal resolution: | snapshot |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | observed (not collected) |
| Reason for describing collection: | general faunal/floral analysis | Collection dates: | 2004-2005 |
Metadata
| Database number: | 135440 | ||
| Authorizer: | R. Butler | Enterer: | R. Butler | Research group: | vertebrate |
| Created: | 2012-10-25 20:44:15 | Last modified: | 2012-10-25 04:44:15 |
| Access level: | the public | Released: | 2012-10-25 20:44:15 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 43352. | D. L. Mickelson, A. C. R. Milner, D. DeBlieux and J. L. McGuire. 2006. The oldest known Early Triassic fossil vertebrate footprints in North America, from Zion National Park, Utah. New Mexico Museum of Natural History and Science Bulletin 34:141-144 [R. Butler/R. Butler] |