Papo Seco Formation

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Papo Seco Formation
Stratigraphic range: Early Barremian
~125–122 Ma
↓
TypeGeological formation
Underlies
Overlies
Lithology
PrimaryMudstone, siltstone
OtherSandstone
Location
Coordinates38°24′N 9°12′W / 38.4°N 9.2°W / 38.4; -9.2Coordinates: 38°24′N 9°12′W / 38.4°N 9.2°W / 38.4; -9.2
Approximate paleocoordinates31°48′N 1°18′E / 31.8°N 1.3°E / 31.8; 1.3
RegionSetubal
Country Portugal
ExtentLusitanian Basin
Papo Seco Formation is located in Portugal
Papo Seco Formation
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[]

The unit was previously referred to as the "Gres a Dinosauriens", due to the abundant dinosaur remains found in the past.[4]

Description[]

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[]

Dinosaurs of the Papo Seco Formation
Genus Species Presence Notes Images
Dromaeosauridae indet.[5] Indeterminate Areias do Mastro's Quarry
Iberospinus I. natarioi[6] Praia de Aguncheiras Was once thought to be a specimen of Baryonyx.[1]
Iberospinus.png
Iguanodon[2] I. sp.[2] Boco do Chapim Previously referred to Mantellisaurus atherfieldensis Iguanodon Skeletal.svg
Suchosaurus[2] S. girardi[2] Boco do Chapim Was considered a species of Baryonyx
Titanosauriformes indet. [2] Indeterminate Boca do Chapim Was referred to "Pleurocoelus" valdensis[2]
Theropoda indet.[2] Indeterminate[2] Boco do Chapim Including Megalosaurus superbus, now known as Erectopus"[2]
Theropoda indet.[5] Indeterminate Areias do Mastro's Quarry

Correlation[]

Early Cretaceous stratigraphy of Iberia
Ma Age Paleomap \ Basins Olanyà Lusitanian
100 Cenomanian
Cenomanian-Coniacian Iberia.jpg
 Caranguejeira
125 Albian -
Monte Grande Escucha Escucha
-
Aptian - - Castrillo
En Gp. - Morella/ Morella
- En Gp. - Forcall Upper
Bedoulian
Barremian Xert Alacón Xert Huérguina
Artoles Collado Papo Seco
Rúbies Tera Gp. - Alacón/Blesa Blesa Camarillas
150 Hauterivian Iberia 120Ma Barremian zoom.tif Ur Gp. - Castellar Tera Gp. -
hiatus
Valanginian Ur Gp. - -
- - Piedrahita
Berriasian Iberia 150Ma Tithonian.jpg - hiatus
- Rupelo Arzobispo hiatus
On Gp. -
Tithonian Lastres Tera Gp. - Higuereles Tera Gp. - Lourinhã
Arzobispo
Legend Major fossiliferous, oofossiliferous, ichnofossiliferous, coproliferous, minor formation
Sources


See also[]

  • List of dinosaur-bearing rock formations

References[]

  1. ^ 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.
  2. ^ a b c d e f g h i j Weishampel et al., 2004, p.562
  3. ^ Papo Seco Formation at Fossilworks.org
  4. ^ a b Aillud, 2001, p.211
  5. ^ a b "Areias do Mastro's Quarry". The Paleobiology Database.
  6. ^ 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. doi:10.1371/journal.pone.0262614. ISSN 1932-6203.


Further reading[]

  • 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
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