The materiality of things: First results of diffractometry and spectrometry analyzes on secondary mineral precipitations associated with rock art in Piraí do Sul, Paraná, Brazil

This study aimed to analyze the minerals precipitated in rocky supports located close sites with rock art municipality of Piraí do Sul, Paraná, order detect possible mineralogical variations from identification secondary minerals. The results point existence important weathering activities related rainfall and action that alter deposits hydrothermal action. conclusions widespread these result, part, alteration support caused by chemical processes rain interaction organic matter (lichen, microorganisms).