Paleoenvironmental reconstruction for the lower Pliocene Arroyo Piedras section (Tubará e Colombia): Implications for the Magdalena River e paleodelta’s dynamic

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dc.citation.journalTitleJournal of South American Earth Sciences
dc.contributor.authorMolinares, C.E.spa
dc.contributor.authorMartinez, J.I.spa
dc.contributor.authorFiorini c, F.spa
dc.contributor.authorEscobard, J.spa
dc.contributor.authorJaramillo, C.spa
dc.contributor.departmentUniversidad EAFIT. Departamento de Geologíaspa
dc.contributor.eafitauthorJosé Ignacio Martínez (jimartin@eafit.edu.co)spa
dc.contributor.researchgroupCiencias del Marspa
dc.date.accessioned2014-05-09T19:20:58Z
dc.date.available2014-05-09T19:20:58Z
dc.date.issued2012-04-02
dc.description.abstractThe Magdalena river transports one of the largest load of sediments per basin area in the world. Its delta position has changed several times over the Neogene. The Arroyo Piedras Section (169 m) in northern Colombia, contains part of the record of the Late Miocene to Early Pliocene evolution of the Magdalena paleodelta. The section was described and sampled for sedimentological and micropaleontological analyses. Based on lithofacies and benthic foraminifera content, the section was divided in three segments, and the upper segment was dated as Early Pliocene using planktonic foraminifera. The lower segment suggests siliciclastic sedimentation in a proximal prodelta/delta plain transitional environment. The intermediate segment suggests sedimentation in a lagoon and/or coastal swamp environment, whereas the upper segment is interpreted as the result of a transgression and subsequent deposition at the foreshore/upper shoreface environment, with a considerable decrease of terrigenous input. The decrease of sediment delivery to the delta produced by permanent El Niño-like conditions coupled with autocyclic processes could explain the transgressive pattern observed in the Arroyo de Piedras section during the Early Plioceneeng
dc.identifier.doi10.1016/j.jsames.2012.04.007.
dc.identifier.issn0895-9811
dc.identifier.urihttp://hdl.handle.net/10784/1595
dc.language.isoengeng
dc.publisherElsevier
dc.relation.ispartofJournal of South American Earth Sciences, Volume 39, November 2012, Pages 170-183eng
dc.relation.uri10.1016/j.jsames.2012.04.007.
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccesseng
dc.rights.localAcceso restringidospa
dc.subject.keywordMagdalena paleodeltaeng
dc.subject.keywordPaleoclimateeng
dc.subject.keywordTubaraeng
dc.subject.keywordBenthonic foraminiferaeng
dc.subject.keywordEarly Plioceneeng
dc.subject.keywordSediment transporteng
dc.subject.keywordLithofacieseng
dc.subject.keywordGeology, stratigraphic - plioceneeng
dc.subject.keywordPetrologyeng
dc.subject.keywordBenthoseng
dc.subject.keywordForaminiferaeng
dc.subject.lembTRANSPORTE DE SEDIMENTOSspa
dc.subject.lembLITOFACIESspa
dc.subject.lembESTRATIGRAFÍA - PLIOCENOspa
dc.subject.lembPETROLOGÍAspa
dc.subject.lembBENTOSspa
dc.subject.lembFORAMINÍFEROSspa
dc.titlePaleoenvironmental reconstruction for the lower Pliocene Arroyo Piedras section (Tubará e Colombia): Implications for the Magdalena River e paleodelta’s dynamiceng
dc.typeinfo:eu-repo/semantics/articleeng
dc.typearticleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.typepublishedVersioneng
dc.type.localArtículospa

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