Microbialite fields developed in a protected rocky coastline: The shallow carbonate ramp of the Aptian Romualdo Formation (Araripe Basin, NE Brazil)

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dc.contributor.authorVarejao, F. G. [UNESP]
dc.contributor.authorFuersich, F. T.
dc.contributor.authorWarren, L. [UNESP]
dc.contributor.authorMatos, S. A. [UNESP]
dc.contributor.authorRodrigues, M. G. [UNESP]
dc.contributor.authorAssine, M. L. [UNESP]
dc.contributor.authorSales, A. M. F.
dc.contributor.authorSimoes, M. G. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionFriedrich Alexander Univ Erlangen Nurnberg
dc.contributor.institutionUniv Reg Cariri
dc.date.accessioned2019-10-04T12:40:55Z
dc.date.available2019-10-04T12:40:55Z
dc.date.issued2019-07-01
dc.description.abstractThe Aptian Romualdo Formation is a siliciclastic-dominated sedimentary unit recording the last marine ingression within the Cretaceous interior basins of northeastern Brazil. At the western margin of the Araripe Basin, rocks of the Romualdo Formation are mainly represented by carbonates resting abruptly over the Proterozoic crystalline basement. Detailed mapping and stratigraphic analysis revealed two stromatolite fields that were described and discussed for the first time. Several bioherms, biostromes and isolated stromatolites characterized by distinct microbialite morphologies associated with echinoid-rich strata have been identified, suggesting that hypersalinity, water depth and hydraulic conditions were the main factors controlling stromatolite morphogenesis. A cm-thick amalgamated bivalve rudstone, resting directly on the basement and representing a shell concentration formed above the fair-weather wave base was also recorded. Based on the regional distribution of the stromatolite types and associated sedimentary fades, we interpret the depositional environment as a local low gradient carbonate ramp deepening to the east. Our data robustly indicated that the western rocky shorelines of the Araripe Basin during the Aptian were populated by microbial mats and stromatolites in a condition analogous to the modern world-famous Hamelin Pool, Shark Bay, Western Australia. Finally, the development of stromatolites and echinoid-bearing microbialites at the western margin of the basin may be correlated with the formation of bakevelliid- and cassiopid-rich shell beds in the upper part of the Romualdo Formation at the eastern margin. (C) 2019 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, Inst Geociencias & Ciencias Exatas, Dept Geol Aplicada, Ave 24A,1515, BR-12506900 Rio Claro, Brazil
dc.description.affiliationFriedrich Alexander Univ Erlangen Nurnberg, FG Palaoumwelt, GeoZentrum Nordbayern, Loewenichstr 28, D-91054 Erlangen, Germany
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias, Dept Zool, BR-18618000 Botucatu, SP, Brazil
dc.description.affiliationUniv Reg Cariri, Dept Ciencias Biol, Campus Pimenta 1161, BR-63100000 Crato, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Geociencias & Ciencias Exatas, Dept Geol Aplicada, Ave 24A,1515, BR-12506900 Rio Claro, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias, Dept Zool, BR-18618000 Botucatu, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipPetrobras
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 2016/13214-7
dc.description.sponsorshipIdFAPESP: 2017/20803-1
dc.description.sponsorshipIdFAPESP: 18/01750-7
dc.description.sponsorshipIdPetrobras: 2014/00519-9
dc.description.sponsorshipIdCNPq: 444070/2013-1
dc.description.sponsorshipIdCNPq: 401039/2013-5
dc.description.sponsorshipIdCNPq: 1082 30017/2015-3
dc.description.sponsorshipIdCNPq: 152385/2016-9
dc.description.sponsorshipIdCNPq: 301294/2018-6
dc.format.extent103-120
dc.identifierhttp://dx.doi.org/10.1016/j.sedgeo.2019.06.003
dc.identifier.citationSedimentary Geology. Amsterdam: Elsevier, v. 389, p. 103-120, 2019.
dc.identifier.doi10.1016/j.sedgeo.2019.06.003
dc.identifier.issn0037-0738
dc.identifier.urihttp://hdl.handle.net/11449/186069
dc.identifier.wosWOS:000482506400008
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofSedimentary Geology
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectStromatolites
dc.subjectMicrobialites
dc.subjectEchinoids
dc.subjectBivalves
dc.subjectShark Bay analogue
dc.subjectLower Cretaceous
dc.titleMicrobialite fields developed in a protected rocky coastline: The shallow carbonate ramp of the Aptian Romualdo Formation (Araripe Basin, NE Brazil)en
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.

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Artigos - Geologia Aplicada - IGCE
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