Luciana Stoessel

IMPLICACIONES PALEOAMBIENTALES DE LA PRESENCIA DEL GÉNERO CERATOPHRYS (ANURA, CERATOPHRYINAE) EN CONTEXTOS ARQUEOLÓGICOS DE LA TRANSICIÓN PAMPEANO-PATAGÓNICA EN EL HOLOCENO TARDÍO (CURSO INFERIOR DEL RÍO COLORADO, ARGENTINA)

In this work, we report the presence of the Ceratophrys genus at the archaeological locality of San Antonio and at the Paso Alsina 1 archaeological site, situated at the lower basin of the Colorado river (Buenos Aires province, Argentina). The materials communicated here are assigned to the late *

SITIO EL TIGRE (PDO. DE PATAGONES, PCIA. DE BUENOS AIRES, ARGENTINA): EVIDENCIAS SOBRE LA EXPLOTACIÓN DE PECES EN EL CURSO INFERIOR DEL RÍO COLORADO E IMPLICACIONES PARA LOS SISTEMAS DE SUBSISTENCIA

RESUMEN El sitio El Tigre se encuentra localizado en el area ecotonal Pampa-Patagonia, a orillas del denominado rio Colorado Viejo. Como resultado del analisis de materiales de superfi cie y de excavaciones sistematicas se exploraron aspectos del sitio ligados a la organizacion de la tecnologia litica, la subsistencia, la tecnologia ceramica, la cronologia (C 14 -OCR), los procesos de formacion del sitio y su funcionalidad, entre otros aspectos. En este trabajo se resume informacion original referida a la subsistencia, con especial enfasis en la explotacion de peces. Esta caracteristica es, precisamente, uno de los aspectos mas destacados del sitio, ya que se trata de evidencia novedosa tanto para el curso inferior del rio Colorado como para areas y regiones aledanas. En este sentido, el sitio sugiere que los peces fl uviales pudieron formar parte de la subsistencia de grupos cazadores-recolectores que habitaron la region durante el Holoceno tardio fi nal (ca. 500 anos AP). Finalmente, esta informacion es comparada y discutida con la procedente de areas vecinas (Region Pampeana, Patagonia septentrional y central).Palabras claves: Curso inferior del rio Colorado - Holoceno tardio fi nal - Explotacion de peces

Was There a Process of Regionalization in Northeastern Patagonia During the Late Holocene

ABSTRACT The objective of this article is to evaluate if changes in the social organization of hunter-gatherer groups from northeastern Patagonia (Argentina) during the Final Late Holocene (ca. 1000–250 years BP) may be understood as a regionalization process. A portion of this region, the lower course of the Colorado River, is taken as a case study. This arid/semi-arid area is part of an ecotone between the Pampas and northeastern Patagonia situated beside the Atlantic coast. Most of the evidence for occupation is concentrated in the Late Holocene, more precisely from 1000 to 250 BP. The archaeological record of this period indicates increased human population, along with a greater intensity of site occupation, the first systematic evidence of coastal occupation, reduced mobility and territoriality, diversification and intensification of subsistence practices, changes in the procurement and use of exotic raw materials, more complex funerary practices, and decreased circulation of specific images in portable artifacts. Based on these data, it is proposed that in some sectors of northeastern Patagonia during the Initial Late Holocene (3000–1000 BP) relatively open social networks operated, while for the Final Late Holocene (1000–250 BP) relatively closed social networks took their place within a framework of increasing regionalization. Factors relating to the latter are likely to have included demographic packing, spatial circumscription, territorial behaviors, and changes in population dynamics that were accompanied by social differentiation and more intense and competitive social interaction networks.

ANÁLISIS PRELIMINAR DE ÁCIDOS GRASOS RECUPERADOS DE CERÁMICAS ARQUEOLÓGICAS DEL CURSO INFERIOR DEL RÍO COLORADO (NORPATAGONIA ORIENTAL): APORTES PARA LA SUBSISTENCIA DE GRUPOS CAZADORES-RECOLECTORES

This paper presents the preliminary results obtained of the analysis of fatty acids recovered from pottery sherds from three archaeological sites of the lower course of the Colorado River (North-eastern Patagonia, Argentina). These sites correspond chronologically to the late Holocene, both initial (ca.