Papo Seco Formation
| Papo Seco Formation | |
|---|---|
| Stratigraphic range: Early Barremian ~ | |
.jpg?lang=en) The Papo Seco Formation outcrops towards the bottom of the Praia do Areia do Mastro site | |
| Type | Geological formation |
| Underlies | Assises à Orbitolines Formation |
| Overlies | Porto da Calada Formation |
| Lithology | |
| Primary | Mudstone, siltstone |
| Other | Sandstone |
| Location | |
| Coordinates | 38°24′N 9°12′W / 38.4°N 9.2°W |
| Approximate paleocoordinates | 31°48′N 1°18′E / 31.8°N 1.3°E |
| Region | Setubal |
| Country | Portugal |
| Extent | Lusitanian Basin |
  Papo Seco Formation (Portugal) | |
The Papo Seco Formation is a geological formation in Portugal, whose strata date back to the Early Cretaceous.[1] Dinosaur fossils are among the fossils that have been recovered from the formation.[2][3]
Name
[edit]The unit was previously referred to as the "Gres a Dinosauriens", due to the abundant dinosaur remains found in the past.[4]
Description
[edit]The Papo Seco Formation (Rey, 1992) marks the return to clastic-dominated sedimentation. Exposure of the formation is found above the low cliff between Rochadouro and Areia do Mastro, and on the foreshore and beach at Boca do Chapim. The Papo Seco Formation is dominated by silty mud-mud deposition. This is interbedded with medium to coarse, commonly ribbon shaped, clastic sandstones. Along the exposure, between Rochadouro and Boca do Chapim, the clastic sands are not laterally continuous. The exposure clearly shows that the ribbon sands are isolated and change laterally into muds. Three distinct sand facies have been identified within the Papo Seco Formation.[4]
Vertebrate paleofauna
[edit]Dinosaurs
[edit]Ornithischians
[edit]Color key
|
Notes Uncertain or tentative taxa are in small text; |
| Ornithischians of the Papo Seco Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Materials | Notes | Images |
| Cariocecus[5] | C. bocagei | Praia do Areia do Mastro | A partial skull | A hadrosauroid ornithopod, which represents the first iguanodontian skull found in Portugal |  |
| Ornithopoda[6] | Indeterminate |
|
Previous supposed reports of Mantellisaurus and Iguanodon cannot be substantiated[6] | ||
| Iguanodontia[6] | |||||
| cf. Styracosterna[6] | |||||
Saurischians
[edit]Color key
|
Notes Uncertain or tentative taxa are in small text; |
| Saurischians of the Papo Seco Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Materials | Notes | Images |
| Dromaeosauridae indet.[7] | Indeterminate | Praia do Areia do Mastro |  | ||
| Iberospinus | I. natarioi[8] | Praia de Aguncheiras | Several assorted bones consist of dentary fragments, teeth, an incomplete right scapula, partial dorsal and caudal vertebrae, rib fragments, a partial pubis, two incomplete calcanea, and a pedal ungual phalanx. | Was once thought to be a specimen of Baryonyx.[1] | |
| Suchosaurus[2] | S. girardi[2] | Boca do Chapim | Two fragment specimens consists of a mandible and one tooth | Was considered a species of Baryonyx | |
| Titanosauriformes indet.[2] | Indeterminate | Boca do Chapim | Was referred to "Pleurocoelus" valdensis[2] | ||
| Theropoda indet.[2] | Indeterminate[2] | Boca do Chapim | Including Megalosaurus superbus, now known as Erectopus"[2] | ||
| Theropoda indet.[7] | Indeterminate | Praia do Areia do Mastro | |||
Correlation
[edit]
See also
[edit]References
[edit]- ^ a b Mateus, Octávio; Araújo, Ricardo; Natário, Carlos; Castanhinha, Rui (21 April 2011). "A new specimen of the theropod dinosaur Baryonyx from the early Cretaceous of Portugal and taxonomic validity of Suchosaurus". Zootaxa. 2827 (1): 54–68. doi:10.11646/zootaxa.2827.1.3. ISSN 1175-5334.
- ^ a b c d e f g h Weishampel et al., 2004, p.562
- ^ Papo Seco Formation at Fossilworks.org
- ^ a b Aillud, 2001, p.211
- ^ Bertozzo, Filippo; Camilo, Bruno; Araújo, Ricardo; Manucci, Fabio; Kullberg, José Carlos; Cerio, Donald G.; Carvalho, Victor Feijó de; Marrecas, Pedro; Figueiredo, Silvério D.; Godefroit, Pascal (December 31, 2025). "Cariocecus bocagei, a new basal hadrosauroid from the Lower Cretaceous of Portugal". Journal of Systematic Palaeontology. 23 (1) 2536347. doi:10.1080/14772019.2025.2536347. ISSN 1477-2019.
- ^ a b c d Domingues Figueiredo, Silvério; Carvalho, Ismar de Souza; Pereda-Suberbiola, Xabier; Proença Cunha, Pedro; Bachtsevanidou Strantzali, Ioanna; Antunes, Vanessa (2022-11-06). "Ornithopod dinosaur remains from the Papo Seco Formation (lower Barremian, Lusitanian Basin, Portugal): a review of old and new finds". Historical Biology. 35 (11): 2181–2192. doi:10.1080/08912963.2022.2138372. ISSN 0891-2963.
- ^ a b "Areias do Mastro's Quarry". The Paleobiology Database.
- ^ Mateus, Octávio; Estraviz-López, Darío (16 February 2022). "A new theropod dinosaur from the early cretaceous (Barremian) of Cabo Espichel, Portugal: Implications for spinosaurid evolution". PLOS ONE. 17 (2) e0262614. Bibcode:2022PLoSO..1762614M. doi:10.1371/journal.pone.0262614. ISSN 1932-6203. PMC 8849621. PMID 35171930.
Further reading
[edit]- S. Figueiredo, I. Bachtsevanidou Strantzali, M. Gomes, R. Pimenta, and M. Santos. 2017. Preliminary Data of New Dinosaurs and Turtles Remains from the basal Deposits of the Papo-Seco Formation in Areias do Mastro's Quarry (Cabo Espichel - Portugal). Arnava 6(1):117-130