Fig. 12

Residual anomalies of the a the Bern3, b the Bern4, c the Wabern1 and d the Wabern2 profiles. On the top plots, the blue dots represent the station locations where gravity data was collected for this study. For all profiles, the blue line highlights the main anomaly, whereas for Bern3, the red line indicates the inner gorge effect. For Wabern1, the broken orange lines on both sides denote the side anomalies. For the bottom plots, the elevation (SwissAlti3D 2 m DEM (© swisstopo)) along the profile is represented by the blue solid line. The red broken line illustrates the bedrock topography of the model by Reber and Schlunegger (2016). The blue dots mark the locations of the gravity stations, the red diamonds indicate drillings that reached the bedrock. Note that for the Bern3 and Bern4 profiles, the red star indicates the location of the Marzili drilling. Please see Figs. 3 and Figures D.8 for location of profiles and stations, Additional file 1: Appendix A for gravity data and B for information on the drillings