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Cronología radiocarbónica en paleoambientes del Pleistoceno tardío y Holoceno de la Pampa Deprimida, provincia de Buenos Aires

Authors: Mari, Florencia; Fucks, Enrique Eduardo; Pisano, María Florencia; Huarte, Roberto Andrés; Carbonari, Jorge Eduardo;

Cronología radiocarbónica en paleoambientes del Pleistoceno tardío y Holoceno de la Pampa Deprimida, provincia de Buenos Aires

Abstract

En la Pampa Deprimida de la provincia de Buenos Aires, se pueden diferenciar dos regiones: la continental y la planicie marina costera. En ambas se observan rasgos geomorfológicos y secuencias sedimentarias que conservan evidencias de las condiciones climáticas bajo las cuales se han generado. En momentos de morfogénesis –en la llanura de inundación del río Salado– se depositaron unidades litoestratigráficas en forma de sedimentos fluvio-lacustres con edades radiocarbónicas entre 14 ka y 0,5 ka del Pleistoceno tardío y Holoceno. En la planicie marina costera se encuentran depósitos ingresivolitorales del pico máximo de la ingresión marina del MIS 1, del orden de los 6 ka, con un posterior y paulatino retiro del mar. En momentos de estabilidad ambiental se formaron suelos, de los cuales se han podido individualizar y datar los geosuelos Puesto Callejón Viejo y Puesto Berrondo en sus sitios tipo, con edades que los sitúan en el Holoceno tardío. Las edades en años C14 AP se determinaron sobre megamamíferos extinguidos, invertebrados marinos y dulceacuícolas y materia orgánica, provenientes de las unidades litoestratigráficas y pedoestratigráficas estudiadas. El clima durante el Pleistoceno tardío fue árido-semiárido. En el Holoceno con alternancias a cálido-húmedo. Este estudio aporta información referente a la factibilidad de ámbitos para los asentamientos humanos y para estudios que necesiten aportes de índole crono/litoestratigráfico.

In the Depressed Pampa of Buenos Aires Province, two regions can be differentiated: the continental and the coastal marine plain environments. Geomorphological characteristics and sedimentary sequences of both sectors preserve evidences of the climatic conditions under which they were generated. In morphogenesis periods –in the foodplain of the Salado river– lithostratigraphic units were deposited in the form of fluvio-lacustrine sediments with radiocarbon ages between 14 ka and 0,5 ka in the Late Pleistocene and Holocene. In the coastal marine plain there are deposits of the MIS 1 marine ingression of circa 6 ka, with a later and gradual retreat of the sea. In periods of environmental stability soils were formed. Among them the geosoils Puesto Callejón Viejo and Puesto Berrondo have been individualized and dated on their type sites with radiocarbon ages corresponding to the Late Holocene. The 14C ages in years BP were determined using bones of extinct megamammals, shells of marine and fresh water invertebrates and organic matter from the lithostratigraphic and pedostratigraphic units. The climate during the Late Pleistocene was arid-semiarid. In the Holocene there were alternations to warm-humid. This study provides information on the feasibility of areas for human settlements and for studies requiring contributions of a chrono/lithoestratigraphic nature.

Fil: Fucks, Enrique Eduardo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Laboratorio de Tritio y Carbono; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Agrarias y Forestales; Argentina. 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

Fil: Carbonari, Jorge Eduardo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Laboratorio de Tritio y Carbono; Argentina. 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

Fil: Huarte, Roberto Andrés. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Laboratorio de Tritio y Carbono; Argentina. 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

Fil: Mari, Florencia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Laboratorio de Tritio y Carbono; Argentina. 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

Fil: Pisano, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina

Country
Argentina
Keywords

Antropología, Paleoambientes, Pampa Deprimida, GN1-890, paleoambientes, edades C14, Pleistoceno tardío, Pampa Deprimida (Buenos Aires, https://purl.org/becyt/ford/1.5, Pampa Deprimida (Buenos Aires, Argentina), Pleistoceno Tardío, Anthropology, Argentina), Holoceno, QH1-278.5, https://purl.org/becyt/ford/1, Natural history (General), Edades, Edades C14

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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