Santa Cruz river basin 

In the middle basin of the Santa Cruz river, glass endscrapers have been recovered, related to occupations corresponding to historical moments, both on the northern and southern banks of the basin. On the northern bank, in spaces occupied by groups composed of a Spaniard and indigenous people who were dedicated to horse taming, as was their custom after the conquest.

On the southern bank, they were identified in wetland areas as part of rescue work. On the other hand, Belardi and Carballo Marina indicate their presence near the Tehuelche reserve of Camusu Aike, suggesting the continuity of knapping practices, though substituting lithic material with glass.