Fig. 1

a Tectonic map of the study area and adjacent areas; after Steck et al. (1999); location of the study area within the European Alps is shown on the topographic map (inset) (from Ryan et al. 2009); stereoplots of poles of foliations (red) and stretching lineations (blue) as lower hemisphere equal area projections are given for the base of the Dent Blanche nappe in the respective areas; localities of samples used for microstructural analyses as well as traces of cross-sections in Fig. 4 are indicated. b Cross-section through the Western Alps; after Escher et al. (1993); trace of cross-section is indicated in Fig. 1b. c Key to the map and cross-section