Fig. 15

Deformation structures at the southern Aar Massif boundary a Top-to-the S shearing at the steeply NNW-dipping tectonic contact between the Aar Massif basement (left) and Jurassic limestones of the Urseren-Garvera zone (right) (coordinates: \(46.6024^{\circ }\text {N}/8.4991^{\circ }\text {E}\), see Fig. 3c for location). b Major steeply NNW-dipping D3 shear zone near the southern Aar Massif boundary with N-block up kinematics (coordinates: \(46.5972^{\circ }\text {N}/8.4581^{\circ }\text {E}\), see Fig. 3c for location). Height of the cliff \(\sim 5\,\text {m}\). c Brittle-ductile D4 S-directed back-thrusts in the Central Aar granite (coordinates: \(46.6200^{\circ }\text {N}/8.4866^{\circ }\text {E}\), see Fig. 7 for location). d Brittle-ductile D4 S-directed back-thrusts in gneiss (coordinates: \(46.6075^{\circ }\text {N}/8.4924^{\circ }\text {E}\), see Fig. 7 for location)