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This article presents the technological study of lithic collections from three archaeological sites located near the at the mouth of the Chapeco river (Alto Alegre 3, Linha Policial 1 and Linha Policial 3), in the states of Santa Catarina and Rio Grande do Sul, dated to the early Holocene and associated with archaeological materials of the Umbu Tradition. We will present the operational schemes of blade production, described for the first time for Brazilian prehistory. Despite the lack of cores, analysis of the blades has established the methods and techniques for their production and the functional potential of blade blanks. With this study, we affirm the necessity of developing detailed technological analyses to understand the settling of South America in all its complexity

Um Novo Conceito de Lascamento no Sul do Brasil: debitagem laminar na foz do rio Chapecó (SC/RS)