south side, Saline River: Early/Lower Coniacian, Kansas
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Reptilia
- Mosasauridae
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Tylosaurus sp.
Marsh 1872
|
1 individual | |||||||||
| FHSM VP-2297, vertebrae, coracoid | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Kansas | County: | Ellis |
| Coordinates: | 38.9° North, 99.3° West (view map) | ||||
| Paleocoordinates: | 40.7° North, 65.3° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Coniacian | 10 m.y. bin: | Cretaceous 6 |
| Key time interval: | Early/Lower Coniacian | ||
| Age range of interval: | 89.80000 - 86.30000 m.y. ago |
Stratigraphy
| Geological group: | Colorado | Formation: | Niobrara | Member: | Fort Hays Limestone |
| Stratigraphic resolution: | bed |
Lithology and environment
| Primary lithology: | poorly lithified "limestone" |
| Secondary lithology: | calcareous "shale" |
| Includes fossils? | Y |
| Lithology description: the formation "ranges from 45 to 80 ft. (17-24 m) in thickness and consists of several relatively resistant beds of chalky limestone separated by thin layers of chalky shale." Specimen is within a "limestone matrix." | |
| Environment: | offshore indet. |
| Geology comments: "The Fort Hays Limestone was deposited [within]... the Western Interior Sea": environment is "mid-ocean, hundreds of kilometers from the nearest coast." | |
Taphonomy
| Modes of preservation: | body |
| Degree of concentration: | -single event |
| Size of fossils: | macrofossils |
| Articulated whole bodies: | none |
| Associated major elements: | all |
| Disassociated major elements: | none |
| Disassociated minor elements: | none |
| Feeding/predation traces: | tooth marks |
| Temporal resolution: | snapshot |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | general faunal/floral analysis |
| Collection method comments: Fort Hays State Museum (FHSM) specimen | |
Metadata
| Database number: | 62792 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2006-07-27 17:52:22 | Last modified: | 2011-06-15 17:21:42 |
| Access level: | the public | Released: | 2006-07-27 17:52:22 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 18108. | M. J. Everhart. 2005. Earliest record of the genus Tylosaurus (Squamata; Mosasauridae) from the Fort Hays Limestone (Lower Coniacian) of western Kansas. Transactions of the Kansas Academy of Science 108(3):149-155 [J. Alroy/J. Alroy/F. Aspromonte] |