The town of Taió is home to archaeological sites, including the INDUMA SC-TA-19 site studied by the
Anchieta Research Institute, which cataloged various lithic artifacts made from silex (flint). According
to the different authors, silex is a rocky material with controversial formation processes in the
literature. In this context, this work aimed to characterize these silex artifacts, define their source area
and geological origin, based on field studies, optical petrography, scanning electron microscopy, and
semi-quantitative chemical analysis. The methodology employed allowed characterizing its source
area, defining that silex consists of bioclasts, wrapped in silica polymorphs, combined with fibrous
chalcedony, in different proportions and establishing its formation in a marine environment.
