Fig. 5From: 5-year chemico-physical evolution of concrete–claystone interfaces, Mont Terri rock laboratory (Switzerland)SEM-EDAX composite Mg-maps (greyscale stripes) superimposed on reflected-light image of interface between OPC concrete (top) and Opalinus Clay. A buff coloured region bordering the interface is rich in phosphate (fossil debris). The width of the image is 26 mmBack to article page