near Downs (USNM): Middle Turonian, Kansas
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Plesiosauria
- Polycotylidae
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Trinacromerum bentonianum n. gen., n. sp.
Cragin 1888
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2 individuals | |||||||||
USNM 10945 (holotype) and 10946 (paratype, form an 'adjacent locality') | ||||||||||
see common names |
Geography
Country: | United States | State/province: | Kansas | County: | Mitchell County |
Coordinates: | 39.4° North, 98.5° West (view map) | ||||
Paleocoordinates: | 39.9° North, 63.5° West | ||||
Basis of coordinate: | stated in text | ||||
Geographic resolution: | small collection |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
Stage: | Turonian | 10 m.y. bin: | Cretaceous 6 |
Key time interval: | Middle Turonian | ||
Age range of interval: | 93.50000 - 89.30000 m.y. ago |
Stratigraphy
Geological group: | Colorado | Formation: | Carlile Shale | Member: | Fairport |
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: "The geologic map of Landes (1930) shows that the only geologic unit exposed in this vicinity is the Fairport Chalk. This matches well with Cragin's (1888) description of the geology, as a few feet below the base of the dark septaria-bearing shale (Blue Hill) is equivalent to within the Fairport Chalk Member of the Carlisle Shale. The age of this specimen is early Middle Turonian" (Schumacher & Everhart 2005, p. 40). |
Lithology and environment
Primary lithology: | "limestone" |
Environment: | marine indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Temporal resolution: | snapshot |
Collection methods and comments
Collection methods: | selective quarrying |
Reason for describing collection: | taxonomic analysis |
Museum repositories: | UNSM |
Metadata
Also known as: | Trinacromerum bentonianum type | ||
Database number: | 117805 | ||
Authorizer: | R. Benson | Enterer: | R. Benson |
Modifier: | M. Carrano | Research group: | vertebrate |
Created: | 2011-09-27 00:24:43 | Last modified: | 2012-01-31 16:24:28 |
Access level: | the public | Released: | 2011-09-27 00:24:43 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
37870. | B. A. Schumacher and M. J. Everhart. 2005. A stratigraphic and taxonomic review of plesiosaurs from the old "Fort Benton Group" of central Kansas: a new assessment of old records. Paludicola 5(2):33-54 [R. Benson/R. Benson/R. Butler] |
Secondary references:
34117 | K. Carpenter. 1996. A review of short-necked plesiosaurs of the Western Interior, North America. Neues Jahrbuch fur Geologie und Palaontologie, Abhandlungen 201(2):259-287 [M. Carrano/H. Street] |