Pottery technology and provenance in southern Tawantinsuyu. A petrographic approach to Provincial Inca style

In Central Western Argentina (CWA), the Provincial Inca pottery has been the most ubiquitous indicator of Inca influence and expansionism during the fifteenth–sixteenth centuries. This paper presents a petrographic analysis of thin sections of ceramic samples from the Inca and local sites located throughout CWA, in order to contribute to the study of the provenance of raw materials, technology, and distribution networks. The results point to a heterogeneous petrographic composition, consistent with a decentralized production model. However, major uniformity in pastes, and a higher correlation with the local geology, is identified in two sectors: the Uspallata Valley and Southern San Juan. Some innovations in production practices (such as grog and volcanic glass inclusions) are also noteworthy, probably in relation to the emergence of new socio-ethnic identities. This information is compared with their archaeological background to contribute to the discussion of the organization of pottery production during the Inca dominance of the state’s southern frontier.