Shear veins developed in the mélange (modified from Fagereng et al.
). Pairs of half arrows indicate sense of shear. (a) Mesoscopic appearance of a shear vein with slickenfibers. (b) Microscopic appearance of a shear vein cut parallel to the slickenfibers and perpendicular to the shear surface, showing the small angle between the slickenfibers and the vein margin, and the solid inclusion bands subperpendicular to the slickenfibers (cross-polarized light). (c) Schematic diagram showing incremental growth of slickenfibers.