Late Quaternary aeolian and fluvial-aeolian deposits from southwestern Pampas of Argentina, southern South America
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 sch...
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2018
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| LEADER | 23095caa a22015257a 4500 | ||
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| 001 | PAPER-24892 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518205650.0 | ||
| 008 | 190410s2018 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-85053081947 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 030 | |a PPPYA | ||
| 100 | 1 | |a Mehl, A. | |
| 245 | 1 | 0 | |a Late Quaternary aeolian and fluvial-aeolian deposits from southwestern Pampas of Argentina, southern South America |
| 260 | |b Elsevier B.V. |c 2018 | ||
| 270 | 1 | 0 | |m Mehl, A.; CONICET - Universidad Nacional de La Pampa, Instituto de Ciencias de la Tierra y Ambientales de La Pampa (INCITAP), Uruguay 151, Argentina; email: adrianamehl@conicet.gov.ar |
| 506 | |2 openaire |e Política editorial | ||
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| 520 | 3 | |a 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. © 2018 Elsevier B.V. |l eng | |
| 536 | |a Detalles de la financiación: Universidad de Buenos Aires, UBACyT20620130100002BA, UBACyT20620100100009 | ||
| 536 | |a Detalles de la financiación: Universidad Nacional de La Pampa, Exac-234 | ||
| 536 | |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas, PIP-5819 | ||
| 536 | |a Detalles de la financiación: This work was supported by CONICET ( PIP-5819 ), the Universidad Nacional de La Pampa ( Exac-234 ) and the Universidad de Buenos Aires ( UBACyT20620100100009 , UBACyT20620130100002BA ). Meteorological data were kindly provided by the Servicio Meteorológico Nacional (National Weather Service). We want to express our gratitude to Prof. Dr. Wolfgang Zech (University of Bayreuth, Germany) who kindly provided the OSL dates obtained at the Toay section. We thank Stefannazzi family for allowing us to work in their farm in the Quehué Valley. | ||
| 593 | |a CONICET - Universidad Nacional de La Pampa, Instituto de Ciencias de la Tierra y Ambientales de La Pampa (INCITAP), Uruguay 151, Santa Rosa, La Pampa, Argentina | ||
| 593 | |a Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Ciencias Geológicas, Buenos Aires, Argentina | ||
| 593 | |a CONICET – Universidad de Buenos Aires, Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires (IGEBA), Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a DRY PALEOENVIRONMENTS |
| 690 | 1 | 0 | |a EPHEMERAL FLUVIAL PROCESSES |
| 690 | 1 | 0 | |a INLAND DUNE FIELDS |
| 690 | 1 | 0 | |a PEDOGENESIS |
| 690 | 1 | 0 | |a SHALLOW LAKE |
| 690 | 1 | 0 | |a AGGRADATION |
| 690 | 1 | 0 | |a DUNE FIELD |
| 690 | 1 | 0 | |a EOLIAN DEPOSIT |
| 690 | 1 | 0 | |a EPHEMERAL STREAM |
| 690 | 1 | 0 | |a FLUVIAL DEPOSIT |
| 690 | 1 | 0 | |a FLUVIAL PROCESS |
| 690 | 1 | 0 | |a FORELAND BASIN |
| 690 | 1 | 0 | |a FOSSIL |
| 690 | 1 | 0 | |a HOLOCENE |
| 690 | 1 | 0 | |a LAKE |
| 690 | 1 | 0 | |a MAMMAL |
| 690 | 1 | 0 | |a PALEOENVIRONMENT |
| 690 | 1 | 0 | |a PEDOGENESIS |
| 690 | 1 | 0 | |a PLEISTOCENE |
| 690 | 1 | 0 | |a QUATERNARY |
| 690 | 1 | 0 | |a SHALLOW WATER |
| 690 | 1 | 0 | |a SUCCESSION |
| 690 | 1 | 0 | |a PAMPAS |
| 690 | 1 | 0 | |a MAMMALIA |
| 651 | 4 | |a ARGENTINA | |
| 651 | 4 | |a LA PAMPA | |
| 700 | 1 | |a Tripaldi, A. | |
| 700 | 1 | |a Zárate, M. | |
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| 856 | 4 | 0 | |u https://doi.org/10.1016/j.palaeo.2018.08.014 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_00310182_v511_n_p280_Mehl |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310182_v511_n_p280_Mehl |y Registro en la Biblioteca Digital |
| 961 | |a paper_00310182_v511_n_p280_Mehl |b paper |c PE | ||
| 962 | |a info:eu-repo/semantics/article |a info:ar-repo/semantics/artículo |b info:eu-repo/semantics/publishedVersion | ||
| 963 | |a VARI | ||
| 999 | |c 85845 | ||