| Coimbra Formation | |
|---|---|
| Stratigraphic range: Early to Late Sinemurian | |
.jpg) S. Pedro de Muel Beach, the main outcrop | |
| Type | Geological formation |
| Underlies | |
| Overlies | |
| Area | Lusitanian Basin |
| Thickness | 120-150 m |
| Lithology | |
| Primary | Limestones |
| Location | |
| Location | Coimbra Region |
| Coordinates | 39.8° N, 9.0° W |
| Region | Lusitanian Basin |
| Country |  Portugal |
| Type section | |
| Named for | The Village of Coimbra |
| Thickness at type section | ~120 m (390 ft) |
  Coimbra Formation (Portugal) | |
The Coimbra Formation (Also known as Camadas de Coimbra or Calcários de S. Miguel) is a geological formation of Sinemurian (Lower Jurassic) age in the Lusitanian Basin of Portugal.[1] The unit represents a series of peritidal to intertidal facies of a Carbonate platform mostly of Obtusum–Oxynotum age, that gradually evolve to open marine/hemipelagic units Vale das Fontes Formation and Lemede formation.[2][3] This unit is known for its fossil content, including Invertertebrate and vertebrate ichnofossils and fossils.[4][5]
- ^ Duarte, Luís Vítor; Silva, Ricardo Louro; Azerêdo, Ana Cristina; Comas-Rengifo, María José; Mendonça Filho, João Graciano (2023-01-13). "Shallow-water carbonates of the Coimbra Formation, Lusitanian Basin (Portugal): contributions to the integrated stratigraphic analysis of the Sinemurian sedimentary successions in the western Iberian Margin". Comptes Rendus. Géoscience. 354 (S3): 89–106. doi:10.5802/crgeos.144. ISSN 1778-7025.
- ^ Duarte, L. V.; Soares, A. F. (2002). "Litostratigrafia das séries margo-calcárias do Jurássico inferior da Bacia Lusitânica (Portugal)" (PDF). Com. Instituto Geológico e Mineiro. 89 (1): 135–154.
- ^ Duarte, L. V.; Silva, R. F. L.; Oliveira, L. V.; Rengifo, M. J. C.; Silva, F. (2010). "Organic-rich facies in the Sinemurian and Pliensbachian of the Lusitanian Basin, Portugal: Total Organic Carbon distribution and relation to transgressive-regressive facies cycles". Geologica Acta: 325–340.
- ^ Figueiredo, Silvério D.; de Carvalho, Carlos Neto; Cunha, Pedro P.; Duarte, Luís V.; Fonseca, Alexandre; Monteiro, Cláudio; Forte, João (2023-09-20). "The first dinosaurs in Iberia: a new dinosaur tracksite from the Sinemurian (Lower Jurassic) of Portugal". Historical Biology: 1–14. doi:10.1080/08912963.2023.2256751. ISSN 0891-2963.
- ^ Puértolas-Pascual, Eduardo; Marx, Miguel; Mateus, Octávio; Saleiro, André; Fernandes, Alexandra; Marinheiro, João; Tomás, Carla; Mateus, Simão (2021). "A new plesiosaur from the Lower Jurassic of Portugal and the early radiation of Plesiosauroidea". Acta Palaeontologica Polonica. 66. doi:10.4202/app.00815.2020. hdl:10362/123694. ISSN 0567-7920.