Planar and linear fabric measurements from the Axial Zone. (a) Ss schistosity poles of the superstructure. (b) Ls mineral-stretching lineations of the superstructure. Ss/Ls fabrics were statistically steeper than they appear before post-Paleozoic flexure of the southern half of the Axial Zone (e.g., Fig. 4). (c) Si foliation poles of the infrastructure. (d) Li mineral-stretching lineations of the infrastructure. The red dot represents the mean pole of Ss schistosity and the red star is the pole to the planar best fit of the Si foliations, which is interpreted as the domes' hinge trend. Dark blue dots represent mean mineral-stretching lineations. Measurements are too numerous to be shown in (a) and (c). Contours are 2σ. The data include those acquired for the present study and those collected from maps and the literature (see Supplementary Material). Lower hemisphere, equal area projection.