Analyses of site formation processes in the Argentine Puna are uncommon and they are mainly devoted to answering taphonomic questions; understanding site formation processes is a prerequisite before inferring past human activity from the spatial distribution of the material remains recovered at any site. The main objective for this research (focusing on a high altitude marsh called Vega de San Francisco in the Puna region, located 21 km from the Argentina-Chile border) was to reconstruct the formation processes of the excavated units through the analysis of their sediments, providing the...