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espanolResumen: La costa oeste norpatagonica presenta indicios de ocupaciones esporadicas al menos entre los 6000 y 900 anos AP. En este trabajo se presentan los resultados de un primer acercamiento desde la tafonomia litica al Alero 2 ubicado en la localidad arqueologica de Punta Porfido. Las excavaciones realizadas sugieren que el alero posee una compleja historia formacional, dominada por procesos endogenos como la meteorizacion y la caida de rocas que, junto con la presencia de potenciales pseudoartefactos, plantean un relevante problema de investigacion. El presente trabajo utiliza herramientas conceptuales y metodologicas derivadas de la tafonomia litica y de la arqueologia experimental para discutir el proceso de formacion del registro litico. EnglishAbstract: The North Patagonian west coast shows signs of sporadic occupations at least between 6000 and 900 years BP. In this paper, we present the results of a first approach from lithic taphonomy to Alero 2, located in the archaeological site of Punta Porfido. The excavations carried out suggest that the rock shelter has a complex formational history, dominated by endogenous processes, such as weathering and rockfall processes that, together with the presence of potential pseudo-artifacts, pose a relevant research problem. The present work uses conceptual and methodological tools derived from lithic taphonomy and experimental archaeology to discuss the process of formation of the lithic record.

DESPRENDIMIENTOS ROCOSOS Y RUIDO TAFONÓMICO: TRABAJO EXPERIMENTAL EN EL ALERO 2 DE PUNTA PÓRFIDO, GOLFO SAN MATÍAS (PROVINCIA DE RÍO NEGRO, ARGENTINA)