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Se relevaron canteras taller secundarias de basalto en la zona de Bajo Caracoles - río Olnie (noroeste de Santa Cruz), permitiendo proponer la ampliación del radio de disponibilidad regional de rocas de buena y muy buena calidad para la talla. La interpretación de cortes delgados de los materiales registrados aumenta la variabilidad petrográfica existente dentro de la denominación arqueológica y macroscópica del Basalto Posadas. Basalt secondary quarries were surveyed in the zone of Bajo Caracoles, Olnie River (NW of Santa Cruz), enabling a proposed extension of the regional availability radius of good and very good quality rocks for flint knapping. The interpretation of petrographic thin sections increases the existing petrographic variability within the archaeological and macrocospic denomination of Basalto Posadas.
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