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Palynology and palynofacies studies in the lowermost Jurassic of the Lusitanian Basin (Pereiros Formation of the Silves Group), Portugal: evidence of the first transgressive episode

2023Journal article Open 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.authorSêco, Sérgio Luís Rodrigues
dc.contributor.authorFernandes, Paulo
dc.date.accessioned2023-12-11T10:52:16Z
dc.date.available2023-12-11T10:52:16Z
dc.date.issued2023
dc.description.abstractThe Silves Group of the Lusitanian Basin in Portugal represents the initial infill of the continental rifting basins that formed during the breakup of northern Pangaea regions. Evaporites, especially halite, mark the transition from continental to marine settings and the beginning of the deposition in passive margin basins. This work presents the results of the palynostratigraphic and palynofacies analysis of two partial sections from the Pereiros Formation at the top of the Silves Group. The two sections are composed of sandstones, mudstones and dolostones interpreted as deposited in fluvial and lacustrine settings without apparent marine influence. The palynological content is diverse and wellpreserved, dating both sections to the early Hettangian (Lower Jurassic), indicated by the presence of spores Ischyosporites variegatus, Kraeuselisporites reissingeri, Porcellispora longdonensis and the pollen grains Perinopollenites elatoides and Pinuspollenites minimus. The palynological content of one of the sections (Lamas I) is noticeable by microforaminifera linings, suggesting evidence for a hitherto marine incursion at this age in the Silves Group stratigraphy. The beds that yielded the microforaminifera linings are interpreted as having been deposited in an estuarine-type setting, created by the first and short-lived marine transgressive event in the Lusitanian Basin during the early Hettangian.pt_PT
dc.description.sponsorshipPRIN 2017RX9XXXYpt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.35535/acpa-2023-0008pt_PT
dc.identifier.eissn2082-0259
dc.identifier.urihttp://hdl.handle.net/10400.1/20200
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherPolish Academy of Sciences, Institute of Botanypt_PT
dc.relationPalynology of the Triassic - Jurassic of the Silves Group in Portugal, its implications on a changing world
dc.relationAquatic Research Infrastructure Network
dc.relationCentre for Marine and Environmental Research (CIMA)
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectMicroforaminifera liningspt_PT
dc.subjectRift basinpt_PT
dc.subjectMarine transgressionpt_PT
dc.subjectEstuarypt_PT
dc.subjectHettangianpt_PT
dc.subjectTethys realmpt_PT
dc.titlePalynology and palynofacies studies in the lowermost Jurassic of the Lusitanian Basin (Pereiros Formation of the Silves Group), Portugal: evidence of the first transgressive episodept_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.awardTitleAquatic Research Infrastructure Network
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/LA%2FP%2F0069%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00350%2F2020/PT
oaire.citation.endPage150pt_PT
oaire.citation.issue63pt_PT
oaire.citation.startPage129pt_PT
oaire.citation.titleActa Palaeobotanicapt_PT
oaire.citation.volume2pt_PT
oaire.fundingStream6817 - DCRRNI ID
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.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublicationa2d98df3-a9c2-4364-a737-25b4e89df80b
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