Late Holocene palaeoenvironments of the Nutria Mansa 1 archaeological site,Argentina |
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| Authors: | Mariano Bonomo Alejandro Fabián Zucol Beatriz Gutiérrez Téllez Andrea Coradeghini María Susana Vigna |
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| Affiliation: | 1.Departamento Científico de Arqueología, Facultad de Ciencias Naturales y Museo,UNLP-CONICET,La Plata,Argentina;2.Laboratorio de Paleobotánica,CICYTTP-Diamante CONICET,Entre Rios,Argentina;3.Departamento de Geología,Universidad Nacional del Sur,Bahia Blanca,Argentina;4.Museo Argentino de Ciencias Naturales Bernardino Rivadavia,Buenos Aires,Argentina;5.Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, UBA, Ciudad Universitaria,Buenos Aires,Argentina |
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| Abstract: | This paper presents results of interdisciplinary palaeoenvironmental research carried out on a sediment sequence from the Nutria Mansa 1 archaeological site. This late Holocene site is located in the Pampean plains, Argentina. Siliceous microfossils were recorded (i.e. phytoliths, diatoms, chrysophytes, sponges) and micro-charcoal was analyzed. In addition, fauna identified at the site were correlated with regional palaeoclimatic evidence. Based on the microfossil associations, we concluded that the human occupations occurred beside a fluvial and brackish-freshwater lacustrine setting. Grass communities were located on its margins that developed under a warm temperate climate with evidence for dryness and marked seasonality in part of the record. Although some stratigraphic and faunal evidence indicates a possible temperature increase, these fluctuations were not sufficient to extirpate mammals of arid and cold environments. |
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| Keywords: | Pampean region Late Holocene Palaeoenvironmental conditions Phytoliths Diatoms Chrysophytes Sponges Faunal remains |
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