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dc.contributor.author Gulbranson, Erik L.
dc.contributor.author Ciccioli, Patricia Lucia
dc.contributor.author Montañez, Isabel P.
dc.contributor.author Marenssi, Sergio Alfredo
dc.contributor.author Limarino, Carlos Oscar
dc.contributor.author Schmitz, M. D.
dc.contributor.author Davydov, V.
dc.date.available 2017-07-10T21:37:10Z
dc.date.issued 2015-08
dc.identifier.citation Gulbranson, Erik L.; Ciccioli, Patricia Lucia; Montañez, Isabel P.; Marenssi, Sergio Alfredo; Limarino, Carlos Oscar; et al.; Paleoenvironments and age of the Talampaya Formation: The Permo-Triassic boundary in northwestern Argentina; Elsevier; Journal of South American Earth Sciences; 63; 8-2015; 310-322
dc.identifier.issn 0895-9811
dc.identifier.uri http://hdl.handle.net/11336/20070
dc.description.abstract The Talampaya Formation is the basal unit of the Ischigualasto-Villa Unión rift system and has been traditionally assigned to the Triassic based on stratigraphic relationships. A median U–Pb age of 252.38 (+0.09/−0.22) Ma was obtained from volcanic zircons collected from a tuff bed close to the top of this unit at the Bordo Atravesado locality in the Cuesta de Miranda area (La Rioja, Argentina). This radiometric age is very close to the accepted Permian–Triassic boundary indicating that, at least in this locality, sedimentation occurred during the Late Permian but may have extended into the earliest Triassic. This new evidence indicates that the onset of the extensional event that gave rise to the rift basins in western Argentina started during the Permian. Detailed sedimentological studies of the 260 m thick Talampaya Formation allowed subdividing the succession into seven facies associations grouped into three evolutionary stages indicating that sedimentary environments initially evolved from alluvial fans to a braided river system. Subsequent intrabasinal volcanism associated with sediment deposition by low-to moderate-sinuosity rivers is recorded in the lower third of the column. The middle and upper part of the unit captures the evolution from ephemeral fluvial systems with an eolian interval to an ephemeral clastic lake with intermittent volcanic ash deposits. These changes indicate a progressive lowering of the landscape and a transition towards arid or semiarid conditions.
dc.format application/pdf
dc.language.iso eng
dc.publisher Elsevier
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject TALAMPAYA Fm.
dc.subject LATE PERMIAN
dc.subject PALEOENVIRONMENTS
dc.subject PALEOCLIMATE
dc.subject.classification Geología
dc.subject.classification Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Paleoenvironments and age of the Talampaya Formation: The Permo-Triassic boundary in northwestern Argentina
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2017-07-10T16:20:21Z
dc.journal.volume 63
dc.journal.pagination 310-322
dc.journal.pais Países Bajos
dc.journal.ciudad Amsterdam
dc.description.fil Fil: Gulbranson, Erik L.. University of Wisconsin; Estados Unidos
dc.description.fil Fil: Ciccioli, Patricia Lucia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires; Argentina
dc.description.fil Fil: Montañez, Isabel P.. University of California at Davis; Estados Unidos
dc.description.fil Fil: Marenssi, Sergio Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires; Argentina
dc.description.fil Fil: Limarino, Carlos Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires; Argentina
dc.description.fil Fil: Schmitz, M. D.. Boise State University; Estados Unidos
dc.description.fil Fil: Davydov, V.. Boise State University; Estados Unidos. Kazan Federal University; Rusia
dc.journal.title Journal of South American Earth Sciences
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jsames.2015.08.008
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0895981115300456


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  • Articulos(IGEBA) [328]
    Articulos de INSTITUTO DE GEOCIENCIAS BASICAS, APLICADAS Y AMBIENTALES DE BS. AS

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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)