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A Lower Cretaceous palynoflora from Carregueira (Lusitanian Basin, westernmost Iberia): taxonomic, stratigraphic and palaeoenvironmental implications
University of Coimbra, MARE - Marine and Environmental Sciences Centre, Largo Marqu^es de Pombal, 3030-790 Coimbra, Portugal..ORCID iD: 0000-0002-5470-5634
Swedish Museum of Natural History, Department of Paleobiology. Department of Geology, Lund University, Sweden.ORCID iD: 0000-0003-2987-5559
University of Coimbra, MARE - Marine and Environmental Sciences Centre, Department of Earth Sciences, Rua Sílvio Lima, Polo II, 3030-790 Coimbra, Portugal.ORCID iD: 0000-0002-9956-4652
University of Coimbra, MARE - Marine and Environmental Sciences Centre, Department of Earth Sciences, Rua Sílvio Lima, Polo II, 3030-790 Coimbra, Portugal.
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2022 (English)In: Cretaceous research (Print), ISSN 0195-6671, E-ISSN 1095-998X, ISSN 0195-6671, Vol. 130, p. 105036-105036, article id 105036Article in journal (Refereed) Published
Abstract [en]

Here we describe a new Lower Cretaceous palynoflora from the Lusitanian Basin, located in the westernmost sector of the Iberian Peninsula. The spore-pollen assemblage was extracted from samples collected in the Carregueira clay pit complex, located near the village of Juncal, western Portugal, from sedimentary deposits belonging to the Figueira da Foz Formation. A rich and well-preserved palynoflora, typical of non-marine fluvial environments, was recovered. Fifty-eight species and morphological groups of palynomorphs in 43 genera were recognized. The palynoflora is dominated by fern spores and conifer pollen. Angiosperm pollen is scarce and mainly represented by Afropollis, Clavatipollenites, Stellatopollis and Senectotetradites. Comparisons with described marine sections in Portugal suggest that the fossil horizon is lower Albian, corresponding to a hiatus between Zone I and Zone II in the Potomac Group of the eastern USA. The same beds contain a mesofossil flora dominated by angiosperm seeds, fruits and flowers. A similar contrast in the relative abundance of angiosperm mesofossils and pollen is seen at other Portuguese localities but is not evident in the Potomac Group. The palynoflora and the sedimentological data suggest deposition in wet lowland environments in a moderately humid regional setting.

Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2022. Vol. 130, p. 105036-105036, article id 105036
Keywords [en]
Spores, Pollen, Cretaceous, Albian, Figueira da Foz Formation, Portugal
National Category
Other Earth and Related Environmental Sciences
Research subject
The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-4882DOI: 10.1016/j.cretres.2021.105036OAI: oai:DiVA.org:nrm-4882DiVA, id: diva2:1714551
Funder
Swedish Research Council, 2019-4061
Note

This research was supported by grants from the Amadeu Dias Foundation, the Portuguese Science Foundation (FCT) through the project UIDB/04292/2020 to MARE - Marine and Environmental Sciences Centre, the Czech Grant Agency (project 20-06134S) and by the Swedish Research Council (VR, grant no. 2019-4061).

Available from: 2022-11-29 Created: 2022-11-29Bibliographically approved

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