AGr-12: Early/Lower Campanian, Alabama
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Testudines
- Ctenochelyidae
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Ctenochelys acris
Zangerl 1953
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1 specimen | ||||||
see common names |
Geography
Country: | United States | State/province: | Alabama | County: | Greene |
Coordinates: | 32.8° North, 88.0° West (view map) | ||||
Paleocoordinates: | 35.5° North, 60.0° West | ||||
Basis of coordinate: | estimated from map | ||||
Geographic resolution: | small collection |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
Stage: | Campanian | 10 m.y. bin: | Cretaceous 7 |
Key time interval: | Early/Lower Campanian | ||
Age range of interval: | 83.50000 - 70.60000 m.y. ago |
Stratigraphy
Formation: | Mooreville Chalk | ||||
Stratigraphic resolution: | formation | ||||
Stratigraphy comments: "The formation is diachronous, with surface exposures ranging in age from latest Santonian in the central portion of the state, to early Campanian at the western edge of Alabama (Mancini et al. 1995). Isotopic analysis (Liu 2009) and nanofossils (Raymond et al. 1988) from the Mooreville Chalk of Greene County indicate a Campanian age for these deposits of between 82 and 83.5 Ma." |
Lithology and environment
Primary lithology: | concretionary,pyritic claystone |
Lithology description: compact bluish grey clay belonging to the upper portion of the Mooreville Chalk | |
Environment: | marine indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Collection methods and comments
Reason for describing collection: | general faunal/floral analysis |
Metadata
Database number: | 181624 | ||
Authorizer: | P. Holroyd | Enterer: | P. Holroyd |
Modifier: | P. Holroyd | Research group: | vertebrate |
Created: | 2016-09-24 02:05:20 | Last modified: | 2016-09-24 02:11:04 |
Access level: | the public | Released: | 2016-09-24 02:05:20 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
60410. | A. D. Gentry. 2017. New material of the Late Cretaceous marine turtle Ctenochelys acris Zangerl, 1953 and a phylogenetic reassessment of the ‘toxochelyid’-grade taxa. Journal of Systematic Palaeontology 15(8):675-696 [P. Holroyd/P. Holroyd/P. Mannion] |