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New data on the palynology of the Triassic–Jurassic boundary of the Silves Group, Lusitanian Basin, Portugal

2021Journal article Restricted access
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dc.contributor.authorVilas Boas, Margarida
dc.contributor.authorPereira, Zélia
dc.contributor.authorCirilli, Simonetta
dc.contributor.authorDuarte, Luís Vítor
dc.contributor.authorFernandes, Paulo
dc.date.accessioned2021-07-09T09:03:32Z
dc.date.available2021-07-09T09:03:32Z
dc.date.issued2021
dc.description.abstractNew evidence is presented on the Triassic–Jurassic boundary in the northern Lusitanian Basin, Portugal, based onmiospore assemblages from a composite Upper Triassic to Lower Jurassic succession of the Silves Group. The lat-ter comprises, from base to top, the Conraria, Penela, Castelo Viegas and the Pereiros formations. Three informalpalynologicalzones havebeendocumented andcomparedwith coevalpalynozonesfromWestandSouth Europeprovidingnew biostratigraphic data to detail the age of the lower and upper formationsofthe SilvesGroup and toreview previous age attribution.A Norian, possibly earliest Rhaetian age, is documented for the Conraria Formation on the basis of a palynologicalassemblage referable to theClassopollis meyerianus–Granuloperculatipollis rudis(CG) zone. The Penela andCastelo Viegas formations did not allow a palynostratigraphic revision, due to the not promising lithology for pal-ynological studies. The Pereiros Formation is dated on the basis of microflora assemblages referable, from bottomto top, theIschyosporites variegatus–Kraeuselisporites reissingeri(IK) zone of late Rhaetian–earliest Hettangian ageandPinuspollenites minimus(Pm) zone of Hettangian age. The discontinuity between the underlying CasteloViegas Formation and the overlying Pereiros Formation did not allow to define the lower boundary of the IKpalynozone. The Triassic–Jurassic boundary lies in the lower part of Pereiros Formation within the IK zone. Themicroflora assemblages from the Lusitanian Basin show close affinity to those of eastern N America and westernTethys areas.pt_PT
dc.description.sponsorshipSFRH/BD/144125/2019; UIDP/00350/2020;pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.revpalbo.2021.104426pt_PT
dc.identifier.issn0034-6667
dc.identifier.urihttp://hdl.handle.net/10400.1/16756
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.subjectSporespt_PT
dc.subjectPollenpt_PT
dc.subjectPalynostratigraphypt_PT
dc.subjectTriassic–Jurassic boundary (TJB)pt_PT
dc.subjectLusitanianpt_PT
dc.subjectBasinpt_PT
dc.subjectPortugalpt_PT
dc.titleNew data on the palynology of the Triassic–Jurassic boundary of the Silves Group, Lusitanian Basin, Portugalpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage104426pt_PT
oaire.citation.titleReview of Palaeobotany and Palynologypt_PT
oaire.citation.volume290pt_PT
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
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication75c333b6-ac00-466c-a823-fc433581e716
relation.isAuthorOfPublicationa2d98df3-a9c2-4364-a737-25b4e89df80b
relation.isAuthorOfPublication.latestForDiscovery75c333b6-ac00-466c-a823-fc433581e716

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