Figure F57. Photomicrograph of serpentine shear zone. Fibers of schistose serpentine terminate in a zone of fine, granular serpentine that contains clasts of pyroxene and mesh-texture serpentinite (Sample 209-1270A-1R-1, 35–38 cm) (cross-polarized light: blue + light gray filters; field of view = 5.5 mm; image 1270A_011).