Fig. 7From: Looking for paint mixtures to glimpse pictorial techniques: a micro-stratigraphic physicochemical approach to the rock art from the Oyola’s Caves (Argentina)Samples taken from Oyola 34. a Red sample (329-34-3) analyzed by mRS showing the bands of hematite (h), gypsum (G) and weddellite (w); and SEM–EDS elemental mapping. b Red sample (329-34-14) analyzed by SEM-EDS elemental mappingBack to article page