Fig. 1From: A gravimetric assessment of the Gotthard Base Tunnel geological model: insights from a novel gravity terrain-adaptation correction and rock physics dataThe GBT geological profile, from Guntli et al. (2016). For the sake of graphical representation, the profile has been split into five sections from North to South. The associated legend, describing all the units, is reported in Guntli et al. (2016) in paper format onlyBack to article page