Figure 5

EDX elemental maps from the region medium-dark. (a) Elemental maps of Mg, Cl, Hg and S. Note that sulfur and mercury show the same spatial distribution. (b) Detail of a cavity and elemental map of mercury and sulfur, in this case the correspondence between the copresence of Hg and S with the shape of the cavities is well visible. The yellow rectangular shape and white dotted line highlight the same region and cavity.