Abstract
This work analyze the technological management of raw materials and the mobility strategy of the human groups that occupied during the mid-Holocene (ca. 8000-3000 BP) the eastern Tandilia mountain range, and discuss them inside of settlement systems context for the southeastern Pampean region. The lithic study results of 13 occupations excavated in caves and rockshelters shows that mobility strategies in Tandilia mountain ranges were closer to collector models, where logistical groups moved into mountain range valleys in search of natural resources. We can recognize different strategies for raw material procurement: the immediately available rocks were obtained through direct access on daily foraging trips; the regional rocks were obtained through logistical displacements, residential movements and embedded strategies; and the access to the long distance rocks was through exchange between neighboring populations. Besides, during ca. 7000 to 5000 cal BP an increased use of immediately available raw materials and a high archaeological signal was detected. This scenario can be linked with an increased environmental aridity episode where human groups occupied with most intensity the Tandilia mountain valleys due to the greater availability of the water resources. Finally, this work provides new data suggesting that during this period in the southeastern Pampean region context, the hunter-gatherer groups combined forager and collector strategies to take advantage of the natural resources of the landscape with diverse environments (coastline, grassland plains, dunes field and mountain ranges).
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