Figure F12. Foliated serpentinized peridotite (interval 210-1277A-9R-4, 26-46 cm). The foliation is defined by elongate aggregates of recrystallized pyroxene, which together with pyroxene porphyroblasts define an early high-temperature mylonite fabric. The subvertical orientation of this foliation and the postkinematic serpentinization suggest that the fabric is unlikely to be related to the final exhumation of the mantle rocks to the seafloor. The vertical hairline cracks are filled with calcite and resulted from later deformation at or near the seafloor.

Figure F12. Foliated serpentinized peridotite (interval 210-1277A-9R-4, 26–46 cm). The foliation is defined by elongate aggregates of recrystallized pyroxene, which together with pyroxene porphyroblasts define an early high-temperature mylonite fabric. The subvertical orientation of this foliation and the postkinematic serpentinization suggest that the fabric is unlikely to be related to the final exhumation of the mantle rocks to the seafloor. The vertical hairline cracks are filled with calcite and resulted from later deformation at or near the seafloor.