Cedro Site: Late Aptian - Early Albian, Brazil
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
unclassified
|
|||||||
| see common names | |||||||
Geography
| Country: | Brazil | State/province: | Pernambuco | County: | Exu |
| Coordinates: | 7.5° South, 39.6° West (view map) | ||||
| Paleocoordinates: | 5.1° South, 2.4° East (Wright 2013) | ||||
| Basis of coordinate: | stated in text |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| 10 m.y. bin: | Cretaceous 2-3 - Cretaceous 4 | ||
| Key time interval: | Late Aptian - Early Albian | ||
| Age range of interval: | 119.57 - 110.1 m.y. ago |
Lithology and environment
| Primary lithology: | black "shale" |
| Secondary lithology: | calcareous sandstone |
| Lithology description: The Romualdo Formation is constituted by a sequence of shale intercalated with sandstone at the base, followed by black shale with usually fossiliferous calcareous nodules, and layers of calcareous sandstone with macroinvertebrates. It also contains bony and cartilaginous fish, dinosaurs, pterosaurs, molluscs, echinoids, crustaceans, foraminifera, dinoflagellates, gymnosperms, and angiosperms. (Assine et al. 2014; Prado et al., 2018; Silva-Santos and Valença 1968; Mabessone and Tinoco 1973; Arai and Coimbra 1990; Berthou et al., 1990; Kellner 2002; Bruno and Hessel 2006; Lima et al., 2012; Pinheiro et al., 2014; Pereira et al. 2017). | |
| Environment: | coastal indet. |
| Geology comments: The Romualdo Formation rests unconformably on the underlying Ipubi and Crato formations, or as non-conformity on Precambrian crystalline basement, and the upper sequence boundary is a regional unconformity with the overlying alluvial deposits of the Exu and Araripina formations. Thickness: Up to a 100m thick. (Custodio et al., 2017; Rodriguez et al., 2020). | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 228641 | ||
| Authorizer: | J. Wolfe | Enterer: | A. Lynch |
| Created: | 2022-12-19 16:32:10 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2022-12-19 16:32:10 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 83413. | L. A. C. Prado, J. Luque, A. M. F. Barreto and A. R. Palmer. 2018. New brachyuran crabs from the Aptian–Albian Romualdo Formation, Santana Group of Brazil: Evidence for a Tethyan connection to the Araripe Basin. Acta Palaeontologica Polonica 63(4):737-750 [J. Wolfe/A. Lynch] |