Starkville Gully: Late/Upper Maastrichtian, Mississippi
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Coccolithophyceae
- Microrhabdulaceae
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Lithraphidites quadratus
Bramlette and Martini 1964
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Coccolithophyceae
- Podorhabdales
- Axopodorhabdaceae
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Nephrolithus frequens
Górka 1957
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Cephalopoda
- Ammonitida
- Scaphitidae
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Discoscaphites iris
Conrad 1858
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Cephalopoda
- Ammonitida
- Baculitidae
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Eubaculites latecarinatus
(Brunnschweiler 1966)
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Eubaculites carinatus
(Morton 1834)
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Dinophyceae
- Peridiniales
- Peridiniaceae
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Deflandrea galeata
Lejeune-Carpentier 1942
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unclassified
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Palynodinium grallator
Gocht 1970
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Mississippi | County: | Oktibbeha |
| Coordinates: | 33.5° North, 88.8° West (view map) | ||||
| Paleocoordinates: | 37.0° North, 66.5° West | ||||
| Basis of coordinate: | stated in text | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Late/Upper Maastrichtian | Nannofossil zone: | CC25b |
| Age range of interval: | 72.10000 - 66.00000 m.y. ago |
Stratigraphy
| Formation: | Prairie Bluff Chalk |
| Stratigraphic resolution: | formation |
Lithology and environment
| Primary lithology: | gray silty marl |
| Lithology description: "The “Starkville” gully locality exposes a mixed carbonate-siliciclastic sequence of the uppermost Maastrichtian Prairie Bluff Chalk unconformably overlain by the Paleocene Clayton Formation. The Prairie Bluff Chalk consists of ~13.5 m thick massive, bioturbated, poorly fossiliferous, interbeds of gray glauconitic micaceous silty marlstone and white chalky marlstone. Granular-size phosphatic nodules with phosphatized and unphosphatized internal molds of molluscs and shark teeth are concentrated as a 2-3 cm thick discontinuous bed 13 m below the formational boundary. This phosphatic bed is overlain by a 20 cm thick hummocky cross-stratified calcareous sand unit. The top of the Prairie Bluff Chalk is marked by a bioturbated and undulating contact. The Clayton Formation consists of a 60 cm gray, micaceous silty sand overlain by a 20 cm thick tan sandy marl. Rare specimens of the Danian index fossil Pycnodonte pulaskensis occur as float at the top of the tan sandy marl." (Larina et al. 2016) | |
| Environment: | marginal marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils,microfossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | AMNH |
| Taxonomic list comments:Taxon abundances by bed can be found in the original reference | |
Metadata
| Also known as: | AMNH Loc. 3525 | ||
| Database number: | 205798 | ||
| Authorizer: | A. Dunhill | Enterer: | B. Allen |
| Modifier: | P. Wagner | ||
| Created: | 2019-10-22 10:05:47 | Last modified: | 2024-03-15 17:50:28 |
| Access level: | the public | Released: | 2019-10-22 10:05:47 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 70564. | E. Larina, M. Garb, N. Landman, N. Dastas, N. Thibault, L. Edwards, G. Phillips, R. Rovelli, C. Myers and J. Naujokaityte. 2016. Upper Maastrichtian ammonite biostratigraphy of the Gulf Coastal Plain (Mississippi Embayment, southern USA). Cretaceous Research 60:128-151 [A. Dunhill/B. Allen] |