Nugget Sandstone
The Nugget Sandstone is a Late Triassic to Early Jurassic geologic formation that outcrops in Colorado, Idaho and Utah, western United States. Fossil theropod tracks have been reported from the formation.[1]
| Nugget Sandstone Stratigraphic range: Norian-Toarcian ~220–180 Ma | |
|---|---|
| Type | Geological formation |
| Unit of | Glen Canyon Group |
| Underlies | Carmel Formation |
| Overlies | Chinle Formation |
| Thickness | 200 m (660 ft) |
| Lithology | |
| Primary | Sandstone |
| Other | Mudstone, siltstone |
| Location | |
| Coordinates | 40.4°N 109.3°W |
| Approximate paleocoordinates | 27.4°N 46.6°W |
| Region | Colorado, Idaho, Utah |
| Country |  United States |
| Extent | Colorado Plateau |
  Nugget Sandstone (the United States)  Nugget Sandstone (Utah) | |
Fossil content
Intermediate theropod, sphenosuchian, drepanosaurid and sphenodontian remains are known.[2]
| Paleofauna reported from the Nugget Sandstone | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Material | Notes | Images | ||
| Caelestiventus[3] | C. hanseni | Most of the skull, a complete lower jaw, a finger bone | A dimorphodontid pterosaur, the first known diagnostic pterosaur in North America. | |||
- Other fossils
- Rhynchosauroides sp.
- Lepidosauria indet.
Ichnofossils
- Batrachopus sp.
- Brachychirotherium sp.
- Brasilichnium sp.
- Cochlichnus sp.
- Diplichnites sp.
- Grallator (Eubrontes)
- Gwyneddichnium sp.
- Octopodichnus sp.
- Otozoum sp.
- cf. Paleohelcura sp.
- Pterichnus sp.
- Scoyenia sp.
- Treptichnus sp.
- ?Acanthichnus sp.
- ?Apatopus sp.
See also
- List of pterosaur-bearing stratigraphic units
- List of dinosaur-bearing rock formations
References
- Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
- B. B. Britt, D. J. Chure, G. F. Engelmann and J. D. Shumway. 2016. Rise of the erg—paleontology and paleoenvironments of the Triassic-Jurassic transition in northeastern Utah. Geology of the Intermountain West 3:1-32
- Brooks B. Britt; Fabio M. Dalla Vecchia; Daniel J. Chure; George F. Engelmann; Michael F. Whiting; Rodney D. Scheetz (2018). "Caelestiventus hanseni gen. et sp. nov. extends the desert-dwelling pterosaur record back 65 million years". Nature Ecology & Evolution. in press. doi:10.1038/s41559-018-0627-y. PMID 30104753.
Bibliography
- Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2
Further reading
- Lockley, M. G.; Tedrow, A. R.; Chamberlain, K. C.; Minter, N. J.; Lim, J.-D. (2011). Sullivan, R. M.; Lucas, S. G.; Spielmann, J. A. (eds.). "Footprints and invertebrate traces from a new site in the Nugget Sandstone (Lower Jurassic) of Idaho: implications for life in the northern reaches of the great Navajo-Nugget erg system in the western USA". Fossil Record 3. New Mexico Museum of Natural History and Science Bulletin. 53: 344–356.
- Lockley, M. G. (2011). Sullivan, R. M.; Lucas, S. G.; Spielmann, J. A. (eds.). "Theropod- and prosauropod-dominated ichnofaunas from the Navajo-Nugget Sandstone (Lower Jurassic) at Dinosaur National Monument: implications for prosauropod behaviour and ecology". Fossil Record 3. New Mexico Museum of Natural History and Science Bulletin. 53: 316–320.
- Lockley, M. G. (1986). "A Guide to Dinosaur Tracksites of the Colorado Plateau and American Southwest". University of Colorado at Denver Geology Department Magazine. Special Issue 1: 1–56.
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