Papo Seco Formation

Papo Seco Formation
Stratigraphic range: Early Barremian
~125–122 Ma

PreꞒ

Ꞓ

O

S

D

C

P

T

J

K

Pg

N

↓
Papo Seco Formation; Stratigraphic range: Early Barremian; ~125–122 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Underlies	Assises à Orbitolines Formation
Overlies	Porto da Calada Formation
Lithology
Primary	Mudstone, siltstone
Other	Sandstone
Location
Coordinates	38.4°N 9.2°W
Approximate paleocoordinates	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

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

Ornithischians of the Papo Seco Formation
Genus	Species	Presence	Notes	Images
Dromaeosauridae indet.[5]	Indeterminate	Areias do Mastro's Quarry
Iguanodon[2]	I. sp.[2]	Boco do Chapim	Previously referred to Mantellisaurus atherfieldensis
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]
Spinosauridae[1][6]	Indeterminate	Praia das Aguncheiras	Was thought to be a specimen of Baryonyx, but lacks baryonychine synapomorphies.[6]
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	Cantabrian	Olanyà	Cameros	Maestrazgo	Oliete	Galve	Morella	South Iberian	Pre-betic	Lusitanian
100	Cenomanian		La Cabana	Sopeira	Utrillas		Mosquerela					Caranguejeira
			Altamira		Utrillas
			Eguino
125	Albian		Ullaga - Balmaseda	Lluçà						Traiguera
			Monte Grande		Escucha		Escucha			Jijona
			Itxina - Miono		Escucha
	Aptian		Valmaseda - Tellamendi		Ol Gp. - Castrillo	Benassal		Benassal				Olhos
			Valmaseda - Tellamendi	Font	En Gp. - Leza	Morella/Oliete	Oliete	Villaroya	Morella	Capas Rojas		Almargem
			Patrocinio - Ernaga	Senyús	En Gp. - Jubela	Forcall				Villaroya	Upper Bedoulian	Figueira
	Barremian		Vega de Pas	Cabó	Abejar	Xert	Alacón	Xert		Huérguina	Upper Bedoulian	Assises
				Prada	Abejar	Artoles				Collado	Moutonianum	Papo Seco
				Rúbies	Tera Gp. - Golmayo	Alacón/Blesa	Blesa	Camarillas	Mirambel	Collado	Moutonianum	Papo Seco
150	Hauterivian				Ur Gp. - Pinilla	Llacova	Blesa	Castellar	Tera Gp. - Pinilla	Villares		Porto da Calada
						Llacova	hiatus			Villares
						Huerva			Gaita
	Valanginian		Villaro		Ur Gp. - Larriba				Ped Gp. - Hortigüela
					Ped Gp. - Hortigüela				Ped Gp. - Piedrahita
					Peñacoba			Galve		Miravetes
	Berriasian		Cab Gp. - Arcera		Valdeprado	hiatus		Alfambra		Miravetes
					TdL Gp. - Rupelo			Arzobispo	hiatus	Tollo
					On Gp. - Huérteles Sierra Matute			Arzobispo		Tollo
	Tithonian		Lastres		Tera Gp. - Magaña		Higuereles			Tera Gp. - Magaña		Lourinhã
					Tera Gp. - Magaña				Arzobispo
					Ágreda				Arzobispo
Legend		Major fossiliferous, oofossiliferous, ichnofossiliferous, coproliferous, minor formation
Sources

References

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.
Weishampel et al., 2004, p.562
Papo Seco Formation at Fossilworks.org
Aillud, 2001, p.211
"Areias do Mastro's Quarry". The Paleobiology Database.
Arden, Thomas M. S.; Klein, Catherine G.; Zouhri, Samir; Longrich, Nicholas R. (2019-01-01). "Aquatic adaptation in the skull of carnivorous dinosaurs (Theropoda: Spinosauridae) and the evolution of aquatic habits in spinosaurids". Cretaceous Research. 93: 275–284. doi:10.1016/j.cretres.2018.06.013. ISSN 0195-6671.

Bibliography

Weishampel, David B.; Peter Dodson, and Halszka Osmólska (eds.). 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21.ISBN 0-520-24209-2
Aillud, Gary Stefan. 2001. Palaeoecology, palaeoenvironmental analysis and their application to Sequence Stratigraphy: Lower Cretaceous, Lusitanian Basin, Portugal, 1–360. University of Plymouth. Accessed 2017-10-02.