Fig. 4

Lower-hemisphere equal-area projections. a Bedding and lithological contact orientations in the Infrahelvetic Complex (below Glarus Thrust) plotted as poles to planes. The bedding orientation data is divided into measurements from the Tschep Nappe (NE of Panixer Pass Transverse Zone) and the Cavorgia and Prau-Lurign Slices (SE of Panixer Pass Transverse Zone). Best-fitting great circles and resulting fold axes are calculated for each sub-dataset. b Foliation in both the Infrahelvetic Complex (below Glarus Thrust) and the Helvetic Nappes (above Glarus Thrust) plotted as poles to planes. For each sub-dataset, the mean pole and the corresponding mean foliation orientation (dip azimuth/dip angle) is calculated. In addition, crenulation fold axes and stretching lineations in the Helvetic Nappes are plotted with their corresponding mean values. c Orientation of Glarus Thrust, plotted as both great circles and poles to planes (with mean value), as well as striations on the Glarus Thrust. The best-fitting great circle and the resulting fold axis are calculated from the thrust orientation data. Plotted in all sub-figures is the fold axis of the Crena-Martin Fold (CMF) as inferred from Fig. 2