Fig. 2From: Deep hydrochemical section through the Central Alps: evolution of deep water in the continental upper crust and solute acquisition during water–rock-interaction along the Sedrun section of the Gotthard Base TunnelGeological cross section along the investigated tunnel section Sedrun. Triassic Röti dolomite marble of the Urseren-Garvera Zone (UGZ) highlighted in yellowBack to article page