Fig. 15

Left side Cross-section through centrifuge analogue model WD-4 of Dixon (1975), consisting of a lower layer (light grey) with lower density and higher viscosity, and an upper layer (dark grey) with higher density and lower viscosity. Deformation of initially square grid shows strain and shear sense. Within the diapir, the direction of stretching is indicated by short black lines. It is vertical in the lower part and horizontal in the upper part of the diapir. Above the top of the diapir, shear sense is indicated by black half arrows. Right side Orientation of stretching lineation in the Adula Nappe after Nagel (2008). N–S to NW–SE trending stretching lineations formed during the Zapport Phase, WSW–ENE stretching lineations at the front of the Adula Nappe during the Leis Phase. Shear sense in the Vals-Scaradra Shear Zone indicated by half arrows