Muddy Creek Plesiosaur Site (Lower Horizon): Cenomanian, Utah
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda
- Ammonitida
- Acanthoceratidae
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Metoicoceras geslinianum
(d'Orbigny 1841)
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Cephalopoda
- Ammonitida
- Placenticeratidae
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Placenticeras cumminsi
(Cragin 1893)
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Cephalopoda
- Ammonitida
- Anisoceratidae
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Allocrioceras annulatum
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based on collection of Swensen 1962 | ||||||||||
Cephalopoda
- Ammonitida
- Baculitidae
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Sciponoceras gracile
(Shumard 1860)
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Gastropoda
- Turritellidae
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Turritella whitei
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Bivalvia
- Myalinida
- Inoceramidae
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Inoceramus pictus
Sowerby 1829
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recombined as Inoceramus (Inoceramus) pictus | ||||||||||
see common names |
Geography
Country: | United States | State/province: | Utah | County: | Kane |
Coordinates: | 37.3° North, 112.7° West (view map) | ||||
Paleocoordinates: | 39.0° North, 75.4° 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 |
*Period: | Late/Upper Cretaceous | *Epoch: | Gallic |
*International age/stage: | Middle - Late/Upper Cenomanian | ||
Key time interval: | Cenomanian | Ammonoid zone: | Sciponoceras gracile |
Age range of interval: | 100.50000 - 93.90000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Tropic Shale |
Stratigraphic resolution: | bed |
Lithology and environment
Primary lithology: | concretionary,gray lime mudstone |
Lithology description: medium gray, non-septarian, spheroidal, micrite concretions | |
Environment: | marine indet. |
Geology comments: ammonites found in concretions, bivalves "near the margin of the concretions" |
Taphonomy
Modes of preservation: | concretion |
Collection methods and comments
Collection methods: | field collection |
Reason for describing collection: | biostratigraphic analysis |
Metadata
Database number: | 5608 | ||
Authorizer: | J. Alroy | Enterer: | J. Alroy |
Modifier: | A. Hendy | Research group: | marine invertebrate |
Created: | 1999-10-31 14:23:28 | Last modified: | 2009-05-25 00:11:36 |
Access level: | the public | Released: | 1999-10-31 14:23:28 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
339. | D. D. Gillette, M. C. Hayden, and A. L. Titus. 1999. Occurrence and biostratigraphic framework of a plesiosaur from the Upper Cretaceous Tropic Shale of southwestern Utah. Utah Geological Survey Miscellaneous Publication 99(1):269-273 [J. Alroy/J. Alroy/M. Uhen] |