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Laguna Las Vegas is a high integrity and high resolution site. It is a penecontemporaneous record that was formed around 3050-3210 BP which is remarkable due to the high frequency of guanaco bones (Lama guanicoe) and, to a lesser extent, of cauquén remains (Chloephaga sp.). Additionally, a high frequency of bone pounders and chalcedony scrapers was recorded. We propose that this site was a campsite originated by an attritionally discard behavior within a short time frame, in which whole preys (guanacos) were taken for processing, consumption, and subsequent transport of their axial skeleton. The fact that cauquén remains were found suggests that human occupations took place, at least, during spring and summer. Due to these features, Laguna Las Vegas stands out as a valuable site, one which adds useful information about faunal resource management and mobility of the hunter-gatherer populations of the Coyle River middle basin. [ABSTRACT FROM AUTHOR]

The aim of this paper is to analyze the bioarchaeological material from ten sites of the lower basin of the Uruguay River, stored in the Museo Arqueológico Manuel Almeida (Gualeguaychú, Entre Ríos). The bioarchaeological analyses focused on estimating the anatomical composition, the MNI and the sex-age structure for each site of the collection. Based on analyzing catalogue data the precedence of some skeletons was defined and mortuary practices were inferred. A minimum number of 80 individuals of both sexes and different ages have been estimated. It was also possible to recognize primary and secondary burial modalities. At the areal level, bioarchaeological research had little development, so this work provides new information that will extend the discussion on the pre-Hispanic occupations of southern Entre Ríos. [ABSTRACT FROM AUTHOR]