Palaeontological analyses across the Ediacaran-Cambrian boundary, Upper Corumba Group, Brazil

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dc.contributor.authorAdorno, R. R.
dc.contributor.authorWalde, D. H. G.
dc.contributor.authorDo Carmo, D. A.
dc.contributor.authorDenezine, M.
dc.contributor.authorCortijo, I.
dc.contributor.authorSanchez, E. A. M.
dc.contributor.authorTobias, T. C.
dc.contributor.authorFazio, G.
dc.contributor.authorWarren, L. V. [UNESP]
dc.contributor.authorErdtmann, B. D.
dc.contributor.authorCai, Y.
dc.contributor.authorGiorgioni, M.
dc.contributor.authorRamos, M. E. A. F.
dc.contributor.authorBaptista, M. C.
dc.contributor.authorGuimaraes, E. M.
dc.contributor.authorFigueiredo, M. F.
dc.contributor.authorGerms, G. J.
dc.contributor.institutionUniversidade de Brasília (UnB)
dc.contributor.institutionGeol Survey Brazil
dc.contributor.institutionUniversidade Federal de Viçosa (UFV)
dc.contributor.institutionPetrobras SA
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionFUB
dc.contributor.institutionUniv Extremadura
dc.contributor.institutionNorthwest Univ
dc.contributor.institutionUniv Free State
dc.date.accessioned2020-12-10T19:45:15Z
dc.date.available2020-12-10T19:45:15Z
dc.date.issued2019-01-01
dc.description.abstractThis work presents the results of a palaeontological analysis focused on twenty-six species sampled in five sections of the Tamengo and Guaicurus formations, Corumba and Ladario regions: Corcal and Laginha quarries, Porto Sobramil, Porto Figueiras and Ecoparque Cacimba. Besides, palaeoecological and palaeoenvironmental inferences are presented based on the occurrence of this fossil assemblage. Cloudina catinata Cortijo et al., 2010, previously documented in Spain and Siberia, presents an unprecedented occurrence in the American continent, in siltstones of the Tamengo Formation at Porto Figueiras section, Municipality of Corumba, Mato Grosso do Sul State, Brazil. The biota of the Tamengo Formation is updated and composed of three biomineralizing metazoans, including poriferan spicules, putative sponge gemmule, and a sessile epibiontic prokaryotic colony. The present work also deals with the taxonomy and stratigraphic distribution of four ichnospecies and three vendotaenid species that integrate the updated benthic fauna for the upper portion of Corumba Group. The species diversity of the Tamengo Formation was complemented by the occurrence of sixteen microfossil species that possibly represent a marine planktic assemblage. A dramatic change was identified in the palaeoenvironmental conditions of the Tamengo to Guaicurus formations, followed by a mass extinction event, possibly linked to the global EdiacaranCambrian mass extinction. In addition, organic-walled microfossils were prepared and analyzed from sections of three countries: nine species from the Nomtsas Formation, Namibia; four species from the Tagatiya Guazu Formation, Paraguay; and six species from the Dengying Formation, China. An international biostratigraphic essay consisting of six biozones is proposed for the uppermost Ediacaran and one biozone for the earliest Cambrian.en
dc.description.affiliationUniv Brasilia, Inst Geosci, Campus Darcy Ribeiro, BR-70910900 Brasilia, DF, Brazil
dc.description.affiliationGeol Survey Brazil, Ctr Technol Dev CEDES, Setor Bancario Norte, BR-70040904 Brasilia, DF, Brazil
dc.description.affiliationUniv Fed Vales Jequitinhonha & Mucuri, Inst Ciencia & Tecnol, Ctr Estudos Geociencias, BR-39100000 Diamantina, Brazil
dc.description.affiliationPetrobras SA, CENPES, PDGEO BPA, Ave Horacio Macedo 950, BR-21940900 Rio De Janeiro, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Geociencias & Ciencias Exatas, Dept Geol Aplicada, Ave 24A,1515, BR-13506900 Rio Claro, Brazil
dc.description.affiliationFUB, Kaiserswerther St 16-18, D-14195 Berlin, Germany
dc.description.affiliationUniv Extremadura, Fac Ciencias, Area Paleontol, Ave Elvas S-N, E-06071 Badajoz, Spain
dc.description.affiliationNorthwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Shaanxi, Peoples R China
dc.description.affiliationUniv Free State, Dept Geol, Bloemfontein, South Africa
dc.description.affiliationUnespUniv Estadual Paulista, Inst Geociencias & Ciencias Exatas, Dept Geol Aplicada, Ave 24A,1515, BR-13506900 Rio Claro, Brazil
dc.format.extent6
dc.identifierhttp://dx.doi.org/10.3989/egeol.43586.549
dc.identifier.citationEstudios Geologicos-madrid. Madrid: Consejo Superior Investigaciones Cientificas-csic, v. 75, n. 2, 6 p., 2019.
dc.identifier.doi10.3989/egeol.43586.549
dc.identifier.issn0367-0449
dc.identifier.urihttp://hdl.handle.net/11449/196445
dc.identifier.wosWOS:000504634900004
dc.language.isoeng
dc.publisherConsejo Superior Investigaciones Cientificas-csic
dc.relation.ispartofEstudios Geologicos-madrid
dc.sourceWeb of Science
dc.subjectEdiacaran-Cambrian
dc.subjectCorumba Group
dc.subjectBiostratigraphy
dc.subjectMicropaleontology
dc.titlePalaeontological analyses across the Ediacaran-Cambrian boundary, Upper Corumba Group, Brazilen
dc.typeArtigo
dcterms.rightsHolderConsejo Superior Investigaciones Cientificas-csic

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