NCPALEOUT05, Stormy Theropod: Early/Lower Cenomanian, Utah
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Reptilia
- Theropoda
|
||||||||||
|
Moros intrepidus n. gen., n. sp.
Zanno et al. 2019
|
1 individual | |||||||||
| NCSM 33392 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Utah | County: | Emery |
| Coordinates: | 38.6° North, 111.2° West (view map) | ||||
| Paleocoordinates: | 40.0° North, 73.4° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
| Key time interval: | Early/Lower Cenomanian | ||
| Age range of interval: | 100.50000 - 93.90000 m.y. ago | ||
| Age estimate: | maximum 96.4 Ma (U/Pb) |
Stratigraphy
| Geological group: | Dakota | Formation: | Cedar Mountain | Member: | Mussentuchit |
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: lower part of member, 6-7 m above Ruby Ranch Mbr.
A radiometric age of 98.37 ± 0.07 Ma was obtained by the OMNH from volcanic ash within the Mussentuchit Member (Cifelli and others, 1997, 1999). Additional ages by Garrison and others (2007) ranging from 96.7 ± 0.5 to 98.2 ±0.6 Ma indicate that the Mussentuchit Member was deposited over an interval of 1.5 Ma during the early Cenomanian and supports a correlation with the siliceous marine Mowry Shale to the north, which is well-constrained from 40Ar/39Ar sanidine ages obtained from bentonite beds that bracket the Mowry in Wyoming; the basal Arrow Creek Bentonite is 98.5 ± 0.5 Ma and the capping Clay Spur Bentonite is 97.2 ± 0.7 Ma (Obradovich, 1993; Ogg and Hinnov, 2012; Sprinkel and others, 2012) near the base of the Upper Cretaceous. Tucker et al. 2020 also suggested a likely depositional age of ~96-94Ma for the Musseuntuchit member. | |||||
Lithology and environment
| Primary lithology: | volcaniclastic,gray silty mudstone |
| Secondary lithology: | muddy siltstone |
| Includes fossils? | Y |
| Lithology description: "volcanilithic-rich, intercalated drab gray to light gray silty-mudstones and muddy siltstones" | |
| Environment: | delta plain |
| Geology comments: "a coastal mudflat (with associated minor ephemeral channels and lakes)" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
| Associated major elements: | some |
| Fragmentation: | extreme |
| Temporal resolution: | snapshot |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | surface (float),surface (in situ),field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 206450 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2019-11-15 15:27:57 | Last modified: | 2022-12-08 12:09:51 |
| Access level: | the public | Released: | 2019-11-15 15:27:57 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 70947. | L. E. Zanno, R. T. Tucker, A. Canoville, H. M. Avrahami, T. A. Gates and P. J. Makovicky. 2019. Diminutive fleet-footed tyrannosauroid narrows the 70-million-year gap in the North American fossil record. Communications Biology 2(1):61:1-12 [M. Carrano/M. Carrano] |
Secondary references:
| 79275 | R. T. Tucker, L. E. Zanno, H. Huang and P. J. Makovicky. 2020. A refined temporal framework for newly discovered fossil assemblages of the upper Cedar Mountain Formation (Mussentuchit Member), Mussentuchit Wash, Central Utah. Cretaceous Research 110:104384 [P. Mannion/G. Varnham/M. Carrano] |