Crowley's Ridge: Late/Upper Maastrichtian, Missouri
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda
- Ammonitida
- Sphenodiscidae
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Sphenodiscus pleurisepta
(Conrad 1857)
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Sphenodiscus lobatus
(Tuomey 1856)
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Cephalopoda
- Ammonitida
- Scaphitidae
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Discoscaphites minardi
Landman et al. 2004
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Discoscaphites iris
Conrad 1858
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Discoscaphites sphaeroidalis
Kennedy and Cobban 2000
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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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Baculites sp.
Lamarck 1799
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unclassified
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Disphaerogena carposphaeropsis
Wetzel 1933
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Palynodinium grallator
Gocht 1970
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see common names |
Geography
Country: | United States | State/province: | Missouri | County: | Stoddard |
Coordinates: | 37.0° North, 89.9° West (view map) | ||||
Paleocoordinates: | 40.7° North, 66.3° 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 | Ammonoid zone: | Discoscaphites iris |
Age range of interval: | 70.60000 - 66.00000 m.y. ago |
Stratigraphy
Formation: | Owl Creek |
Stratigraphic resolution: | formation |
Lithology and environment
Primary lithology: | gray silty sandstone |
Lithology description: "An excavation at Crowley's Ridge revealed fresh vertical exposures of the uppermost Maastrichtian Owl Creek Formation unconformably overlain by the Paleocene Clayton Formation. The Owl Creek Formation is composed of a 1.5 m thick fining upward massive, bioturbated, fossiliferous, mottled yellowish gray micaceous, glauconitic, quartz-rich silty fine-grained sand with scattered pods. The upper 0.5 m of the Owl Creek Formation weathers orange. The contact between the Owl Creek Formation and Clayton Formation is sharp, slightly bioturbated, and undulating. The Clayton Formation consists of a 0.5 m thick fossiliferous, bioturbated, green glauconitic muddy, fine-grained sand. The majority of the fossils in the Clayton Formation are diagenetically altered to white clay." (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. 3458 | ||
Database number: | 205794 | ||
Authorizer: | A. Dunhill | Enterer: | B. Allen |
Modifier: | B. Allen | ||
Created: | 2019-10-22 09:19:10 | Last modified: | 2019-10-22 09:24:03 |
Access level: | the public | Released: | 2019-10-22 09:19:10 |
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] |