Fig. 2From: Hydro-mechanical evolution of the EDZ as transport path for radionuclides and gas: insights from the Mont Terri rock laboratory (Switzerland)Heterogeneity and anisotropy in the Opalinus Clay at Mont Terri (natural state): a dark grey silty, calcareous layers of the shaly facies with a vein of celestite; b silty to sandy marls of the sandy facies with sandstone lenses cemented with carbonates; c SW dipping fault associated with a folded vein of celestite; d the Main Fault intersecting Gallery 98 in window through shotcreteBack to article page