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dc.contributor.author
Richiano, Sebastián Miguel
dc.contributor.author
Varela, Augusto Nicolas
dc.contributor.author
D'Elia, Leandro
dc.contributor.author
Bilmes, Andrés
dc.contributor.author
Gómez Dacal, Alejandro Rubén
dc.contributor.author
Sial, Alcides N.
dc.contributor.author
Aguirre, Marina Laura
dc.contributor.author
Mari, Florencia
dc.contributor.author
Scivetti, Nicolás
dc.date.available
2023-06-23T17:55:46Z
dc.date.issued
2022-02
dc.identifier.citation
Richiano, Sebastián Miguel; Varela, Augusto Nicolas; D'Elia, Leandro; Bilmes, Andrés; Gómez Dacal, Alejandro Rubén; et al.; Beach ridge evolution during the Holocene Climatic Optimum at Río de la Plata estuary, Argentina: Former answers for future questions?; Elsevier Science; Quaternary International; 638-639; 2-2022; 56-69
dc.identifier.issn
1040-6182
dc.identifier.uri
http://hdl.handle.net/11336/201339
dc.description.abstract
The Holocene shows rapid climatic changes associated with alternating intervals of glacier advances and retreats. The coastal regions, where beach ridges constitute common preserved landforms, are highly sensitive to register such changes and bring light into past littoral environments. Excellent marine Argentinean Holocene deposits associated with the last climate optimum are preserved at the Río de la Plata estuary (Argentina). In this beach ridge, fourteen detailed sedimentary logs were studied in order to generate an palaeoenvironmental model. The analysis of major hierarchy surfaces of the ridge was performed combined field work and Virtual-Outcrop analysis. The ridge presents internal clinoforms that subdivide it into eleven clinothems. The first two clinothems correspond to the development of a sand ridge as a response to the erosion and reworking of previous aeolian Late Pleistocene sediments. Subsequently, a bioclastic ridge was amalgamated with the sand ridge (clinothems III to XI). Simultaneously, in a landward position, a lagoon and washover deposits were developed. Finally, after the stabilization of the beach ridge the continuous sea level fall generated the actual coastal plain deposits. Six 14C ages were obtained at the base of selected clinothems, dated between 5,240 ± 110 cal BP and 3,900 ± 90 cal BP; meaning that in 1,340 years the beach prograded 290 m. Stable isotope analyses (δ13C and δ18O) allowed to infer that the temperature during the evolution of the ridge has two maximum values of 22.5 °C and a minimum of 18.5 °C. The salinity range between 32.53? and 33.16?, showing short variability. The sudden change in the composition of the ridge, from sandy to carbonate sediments, may be interpreted as a combined result of an increase of carbonate productivity along with a decrease of siliciclastic supply at the coast. This stage would have been developed approximately around 5ka B.P., in coincidence with the Holocene Climatic Optimum (as recorded in Argentina) when propitious climatic conditions may have led to the proliferation of large communities of warm and warm temperate benthic organisms. We stress that, the strong activity of the Brazilian current during the Mid-Holocene thermal maximum enabled excellent conditions for the development of a carbonate warm beach similar to that occurring at tropical and subtropical areas nowadays. This study provides an example of the strong changes occurred in coastal environments as a result of climate change, particularly in the context of global warming episodes which characterized interglacial periods of the Late Quaternary in eastern South America.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
MID-HOLOCENE
dc.subject
SW ATLANTIC
dc.subject
BEACH-RIDGE
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EVOLUTIONARY COASTAL MODEL
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CLIMATE CHANGE
dc.subject.classification
Geología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Beach ridge evolution during the Holocene Climatic Optimum at Río de la Plata estuary, Argentina: Former answers for future questions?
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-06-12T12:26:06Z
dc.identifier.eissn
1873-4553
dc.journal.volume
638-639
dc.journal.pagination
56-69
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Richiano, Sebastián Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico de Geología y Paleontología; Argentina
dc.description.fil
Fil: Varela, Augusto Nicolas. YPF - Tecnología; Argentina
dc.description.fil
Fil: D'Elia, Leandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.description.fil
Fil: Bilmes, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico de Geología y Paleontología; Argentina
dc.description.fil
Fil: Gómez Dacal, Alejandro Rubén. YPF - Tecnología; Argentina
dc.description.fil
Fil: Sial, Alcides N.. Universidade Federal de Pernambuco; Brasil
dc.description.fil
Fil: Aguirre, Marina Laura. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina
dc.description.fil
Fil: Mari, Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.description.fil
Fil: Scivetti, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico de Geología y Paleontología; Argentina
dc.journal.title
Quaternary International
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.quaint.2022.02.013
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S1040618222000271
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