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Landscape evolution and climate changes in the Late Pleistocene–Holocene, southern Pampa (Argentina): Evidence from palynology, mammals and sedimentology
![]() | Trends in the faunal human exploitation during the Late... Quaternary International |
![]() Quaternary International, In Press, Corrected Proof, Available online 19 September 2007 María A. Gutiérrez, Gustavo A. Martínez Abstract The main goal of this paper is to highlight regional and temporal variation in the presence and exploitation of faunal resources during the Late Pleistocene and Early Holocene (ca. 12 000–7000 uncalibrated 14C yr BP) in the Pampean region (Argentina, South America). The main issues discussed are a summary of archeological and zooarchaeological evidence (sites, location, chronology, lithic technology, faunal distribution and diversity, etc.) both on regional and areal scales. The topics included in order to characterize subsistence strategies are the climatic changes that operated on and influenced the species, differential species extinction and survival, exploited species diversity, procurement and processing techniques, and intensity of faunal exploitation. It is proposed that the Late Pleistocene–Early Holocene period is characterized by a generalized regional economy, as has also been recently proposed for North America. In general terms, a broad spectrum of resources would have been exploited by humans as suggested by the presence and diversity of consumed species. Given the fluctuating climatic conditions during the Pleistocene-Holocene transition, a subsistence pattern composed of a broad diet would have been a suitable strategy to promote in unstable environments. Both taxonomic diversity and richness are greater when compared with the following time period (Middle Holocene), characterized by a specialized regional economy. ![]() |
![]() | Sedimentologic and paleontologic study of the southeast... Journal of South American Earth Sciences |
![]() Journal of South American Earth Sciences, Volume 20, Issues 1-2, October 2005, Pages 65-71 S.A. Aramayo, B. Gutiérrez Téllez, R.A. Schillizzi Abstract A paleoenvironmental reconstruction of the southeast coast of Buenos Aires province, Argentina, is made mainly on the basis of paleontological and paleoichnological studies, supported by sedimentological analyses and radiocarbon dating. Continental late Pleistocene and continental, transitional, and marine Holocene stratigraphic units are identified. The former comprises fossil mammals and ichnites of 16000–12,000 BP. The continental early Holocene time, ca. 8100 BP, is represented by an interdune paleoenvironment in which shallow brackish ponds were colonized by diatoms, fish, rodents, and birds. A transitional paleoenvironment in the middle Holocene—6930–6570 BP—is recorded by deposits formed by estuarine crabs. During the late Holocene, between 5000 and 4800 BP, a marine transgression was recorded by a rich mollusc fauna. ResumenEl objetivo del presente trabajo es la reconstrucción paleoambiental de un sector de la costa sudeste de la Provincia de Buenos Aires, basado en el estudio paleontológico, paleoicnológico, análisis sedimentológicos y dataciones radiocarbónicas. Fueron identificadas unidades estratigráficas continentales del Pleistoceno tardío y continentales, de transición y marinas de edad holocena. Para el Pleistoceno tardío, se registran restos fósiles e icnitas de mamíferos y aves con rango estratigráfico entre 16,000–12,000 años A.P. Durante el Holoceno temprano, hacia 8100 años A.P.,se registran ambientes de lagunas salobres someras de interduna colonizadas por diatomeas, peces, roedores y aves. En el Holoceno medio, 6930–6570 A.P. se registra un ambiente de transición, con depósitos formados por cangrejos estuarinos. En el Holoceno tardío, 5000–4800 años A.P. se registra una transgresión marina con una fauna rica de moluscos. Se destaca la variabilidad paleoambiental observada en una reducida extensión de costa de la Provincia de Buenos Aires, Argentina.![]() |
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Landscape evolution and climate changes in the Late Pleistocene–Holocene, southern Pampa (Argentina): Evidence from palynology, mammals and sedimentology