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The age of the first pulse of continental rifting associated with the breakup of Pangea in Southwest Iberia: new palynological evidence

2022Journal article Restricted access
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dc.contributor.authorVilas Boas, Margarida
dc.contributor.authorPaterson, Niall W.
dc.contributor.authorPereira, Zélia
dc.contributor.authorFernandes, Paulo
dc.contributor.authorCirilli, Simonetta
dc.date.accessioned2022-06-07T09:16:37Z
dc.date.available2022-06-07T09:16:37Z
dc.date.issued2022
dc.description.abstractIn this work, we report the first palynological age for the base strata of the Silves Sandstones of the Silves Group in the Algarve Basin, located in Southern Portugal. The group is the oldest sedimentary unit of the Algarve Basin and was deposited unconformably over late Pennsylvanian turbidites of the Mira Formation, which were folded and faulted during the Variscan Orogeny. The Silves Group comprises a detrital red bed succession, representing the earliest phase of sedimentation associated with the initial rifting of Pangaea. Macrofossils are rare, occurring predominantly in the top layers of this group, and do not accurately constrain the age of the entire group's deposition. From an outcrop exposed in the central Algarve, a grey mudstone bed positioned 2.5 m above the Variscan unconformity plane yielded palynomorphs that date the beginning of sedimentation in this basin to the early Carnian age (Late Triassic). The moderately well preserved and low-diversity palynological association comprises Aulisporites astigmosus, Enzonalasporites densus, Ovalipollis pseudoalatus, Samaropollenites speciosus, Tulesporites briscoensis and Vallasporites ignacii, among others, and is indicative of an early Carnian age.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1007/s41513-022-00189-0pt_PT
dc.identifier.issn1698-6180
dc.identifier.urihttp://hdl.handle.net/10400.1/17845
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relationPalynology of the Triassic - Jurassic of the Silves Group in Portugal, its implications on a changing world
dc.relationCentre for Marine and Environmental Research (CIMA)
dc.subjectUpper Triassicpt_PT
dc.subjectVariscan unconformitypt_PT
dc.subjectPalynologypt_PT
dc.subjectAlgarve Basinpt_PT
dc.subjectPortugalpt_PT
dc.titleThe age of the first pulse of continental rifting associated with the breakup of Pangea in Southwest Iberia: new palynological evidencept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitlePalynology of the Triassic - Jurassic of the Silves Group in Portugal, its implications on a changing world
oaire.awardTitleCentre for Marine and Environmental Research (CIMA)
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F144125%2F2019/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00350%2F2020/PT
oaire.citation.titleJournal of Iberian Geologypt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameVilas Boas
person.familyNameFernandes
person.givenNameMargarida
person.givenNamePaulo
person.identifier422469
person.identifier.ciencia-id051D-A133-65D9
person.identifier.orcid0000-0001-8501-7052
person.identifier.orcid0000-0003-4888-0230
person.identifier.ridJ-6577-2014
person.identifier.scopus-author-id57197129025
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication.latestForDiscovery75c333b6-ac00-466c-a823-fc433581e716
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