(a) Detailed cross-section of the transition between the infrastructure and the superstructure interpreted as an attachment (southeastern limb of the Bossost dome, road cut NW of Arres, Fig. 8a). (b) Structural elements measured along the cross-section (lower hemisphere, equal area projection). Schistosity and associated shears of the superstructure (in black) are superimposed on the foliations molding the roof of the infrastructure (in red). The steep reverse shears are both North-and South-verging and branch onto the roof of the infrastructure. By contrast, the regional transpressive shear zones cut across the attachment (Fig. 4).