Figure F4. Close-up photographs showing Unit II contacts. At both the upper and lower contacts a mylonitized zone containing both gabbroic and ultramafic material immediately overlies a low-temperature fault breccia. A. Upper contact (interval 209-1268A-12R-1, 125–136 cm). B. Upper contact (interval 209-1268A-12R-1, 137–149 cm). C. Lower contact (interval 209-1268A-15R-1, 8–18.5 cm). D. Lower contact (interval 209-1268A-15R-1, 134

Figure F4. Close-up photographs showing Unit II contacts. At both the upper and lower contacts a mylonitized zone containing both gabbroic and ultramafic material immediately overlies a low-temperature fault breccia. A. Upper contact (interval 209-1268A-12R-1, 125–136 cm). B. Upper contact (interval 209-1268A-12R-1, 137–149 cm). C. Lower contact (interval 209-1268A-15R-1, 8–18.5 cm). D. Lower contact (interval 209-1268A-15R-1, 134–143 cm).