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dc.contributor.author
Mehl, Adriana Ester
dc.contributor.author
Tripaldi, Alfonsina
dc.contributor.author
Zárate, Marcelo Arístides
dc.date.available
2019-08-12T20:14:59Z
dc.date.issued
2018-12
dc.identifier.citation
Mehl, Adriana Ester; Tripaldi, Alfonsina; Zárate, Marcelo Arístides; Late Quaternary aeolian and fluvial-aeolian deposits from southwestern Pampas of Argentina, southern South America; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 511; 12-2018; 280-297
dc.identifier.issn
0031-0182
dc.identifier.uri
http://hdl.handle.net/11336/81508
dc.description.abstract
The central region of Argentina, southern South America, is characterized by an extensive Quaternary aeolian record. In this context, three locations from the southwestern Pampas, an Andean foreland region bearing a rich fossil mammal record that contributed to the South America biostratigraphic scheme, were selected to carry out a comprehensive sedimentological analysis of the late Quaternary deposits. The case studies are located at the Transverse Valleys of La Pampa province (Chapalcó, Quehué and Utracán-Argentino valleys), and exhibit a high resolution of the late Quaternary in comparison with others areas of the southwestern Pampas. The Toay locality (~36° 41′S, 64° 24′W) records aeolian-dominant activity since the end of the Late Pleistocene (~30 ka) onwards, soil formation at some point during the Holocene and early–mid 20th century reactivation of aeolian process. The Arroyo Quehué locality (~37°04′S, 64°42′W) presents a Late Pleistocene-Holocene succession mostly related to an ephemeral endorheic fluvial system, with an interval of relative surface stabilization and aeolian aggradation during the Late Holocene. The Utracán locality (~37°17′S, 64°35′W) exhibits a prevailing aeolian and fluvial-aeolian interaction succession developed in the mid-to Late Holocene in a sand-mud flat environment of a shallow saline lake. The three studied cases are representative of aeolian aggradation in association with ephemeral fluvial, shallow lake and pedogenic processes in a currently subhumid-dry region. Numerical ages indicate sedimentation during the last ~30 kyr. They allow constraining and evaluating the paleoenvironmental conditions in this inland region of southern South America, and provide age constraints for the regional databases of paleoclimatic proxies. The results are in agreement with other late Quaternary paleoclimatic-paleoenvironmental archives of central Argentina and show a fragile aeolian landscape that is susceptible to deterioration under extreme conditions, including both aeolian reactivation during dry phases and erosion of sandy-silty sediments during wet phases.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Dry Paleoenvironments
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Ephemeral Fluvial Processes
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Inland Dune Fields
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Pedogenesis
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Shallow Lake
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Geología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Late Quaternary aeolian and fluvial-aeolian deposits from southwestern Pampas of Argentina, southern South America
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-08-09T15:06:11Z
dc.journal.volume
511
dc.journal.pagination
280-297
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Mehl, Adriana Ester. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias de la Tierra y Ambientales de La Pampa. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Instituto de Ciencias de la Tierra y Ambientales de La Pampa; Argentina
dc.description.fil
Fil: Tripaldi, Alfonsina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina
dc.description.fil
Fil: Zárate, Marcelo Arístides. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias de la Tierra y Ambientales de La Pampa. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Instituto de Ciencias de la Tierra y Ambientales de La Pampa; Argentina
dc.journal.title
Palaeogeography, Palaeoclimatology, Palaeoecology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0031018218304164
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.palaeo.2018.08.014
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