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Dinoflagellate cyst assemblages of the Cunga - Quifangondo cenozoic formations in the Cabo São Brás section, Kwanza Basin (Angola): towards a first stratigraphic and paleoenvironmental interpretation

2021-10Journal article Open access
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dc.contributor.authorPereira, Zélia
dc.contributor.authorMendes, Márcia
dc.contributor.authorRodrigues, C.F.
dc.contributor.authorMulanda, N.
dc.contributor.authorCacama, M.
dc.contributor.authorNsungani, P.C.
dc.date.accessioned2021-10-26T14:55:00Z
dc.date.available2021-10-26T14:55:00Z
dc.date.issued2021-10
dc.date.updated2021-09-03T15:50:59Z
dc.description.abstractABSTRACT: This work introduces one of the first palynostatigraphic study conducted on formations from the Eocene and overlying lowermost Miocene successions (Cunga and Quifangondo formations) exposed in the Onshore Kwanza Basin, Angola. To improve the Cunga and Quifangondo formations age, new biostratigraphic correlations and palaeoenvironmental interpretations based on qualitative and quantitative analyses of organic walled dinoflagellate cysts from sedimentary rocks sampled in the Cabo de Sao Bras section were obtained. Those works have revealed that the Cunga Formation could be assigned to a middle Eocene - early Oligocene age, with a palynomorph signature typical of outer neritic to oceanic environments (dominance of dinocysts with microforaminiferal linings and radiolarian pyritized fragments). The lower Quifangondo Formation could be assigned to late Oligocene (latest Chattian) - early Miocene (Aquitanian) ages. This assumption is based on the first occurrence of Ectosphaeropsis burdigalensis, and the last occurrence of Deflandrea spp. and Chiropteridium galea. Additionally, the Chiropteridium, Distatodinium, Homotryblium, Hystrichokolpoma and Lingulodinium acme endorses a latest Chattian-early Aquitanian age to these samples. The palynomorph signature of this unit reflects an outer neritic environment. The latest Oligocene/early Miocene Quifangondo Formation overlaps unconformably on strata of the middle Eocene to early Oligocene Cunga Formation, pointing out a hiatus between the two units.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPereira, Zélia... [et.al.] - Dinoflagellate cyst assemblages of the Cunga - Quifangondo cenozoic formations in the Cabo São Brás section, Kwanza Basin (Angola): towards a first stratigraphic and paleoenvironmental interpretation. In: Revue de micropaléontologie, 2021, Vol. 72, article nº 100516pt_PT
dc.identifier.doi10.1016/j.revmic.2021.100516pt_PT
dc.identifier.issn0035-1598
dc.identifier.slugcv-prod-2576259
dc.identifier.urihttp://hdl.handle.net/10400.9/3597
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://doi.org/10.1016/j.revmic.2021.100516pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectPaleoambientept_PT
dc.subjectPalinologiapt_PT
dc.subjectPalinoestratigrafiapt_PT
dc.subjectCenozóicopt_PT
dc.subjectBacia do Kwanzapt_PT
dc.subjectLuanda (Angola)pt_PT
dc.titleDinoflagellate cyst assemblages of the Cunga - Quifangondo cenozoic formations in the Cabo São Brás section, Kwanza Basin (Angola): towards a first stratigraphic and paleoenvironmental interpretationpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleRevue de Micropaléontologiept_PT
oaire.citation.volume72pt_PT
person.familyNamePereira
person.familyNameSilva Mendes
person.familyNameRodrigues
person.givenNameZélia
person.givenNameMárcia Cristina
person.givenNameCristina Fernanda Alves
person.identifier493996
person.identifier.ciencia-id6C1B-ED1C-8F5D
person.identifier.ciencia-idE71E-1CB5-D774
person.identifier.ciencia-id7419-A932-CEC5
person.identifier.orcid0000-0003-3056-6219
person.identifier.orcid0000-0003-2290-891X
person.identifier.orcid0000-0002-7616-6985
person.identifier.scopus-author-id55925912600
rcaap.cv.cienciaid6C1B-ED1C-8F5D | Zélia Pereira
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication5d2bf797-f915-4f53-ae53-166dedd0845a
relation.isAuthorOfPublication62179ed8-3ffe-4060-8b9c-e29e4f3e0d27
relation.isAuthorOfPublication750f38f6-31b1-4adf-8eb8-f7bc2c19b011
relation.isAuthorOfPublication.latestForDiscovery62179ed8-3ffe-4060-8b9c-e29e4f3e0d27

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