Plate P1. Photomicrographs of diabase. 1. Preserved magmatic texture in coarse-grained diabase (Sample 180-1109D-48R-3, 63-69 cm) (cross-polarized transmitted light). 2. Porphyroclastic plagioclase in diabase (Sample 180-1109D-51R-3, 58-67 cm) (cross-polarized transmitted light). 3. Basaltic texture of the chilled margin in diabase (Sample 180-1109D-41R-3, 63-69 cm) (cross-polarized transmitted light). 4. Preserved magmatic texture in fine-grained diabase (Sample 180-1109D-51R-4, 6-9 cm) (plane-polarized transmitted light). 5. Poorly preserved magmatic texture in Site 1114 brecciated diabase (Sample 180-1114A-35R-1, 24-27 cm) (plane-polarized transmitted light). 6. Retrogressed and deformed diabase at Site 1114 (plane-polarized transmitted light). Cpx = clinopyroxene, Plg = plagioclase, Glau = glaucony, Chl = chlorite, Calc = calcite, oxi = iron oxide.

Plate P1. Photomicrographs of diabase. 1. Preserved magmatic texture in coarse-grained diabase (Sample 180-1109D-48R-3, 63-69 cm) (cross-polarized transmitted light). 2. Porphyroclastic plagioclase in diabase (Sample 180-1109D-51R-3, 58-67 cm) (cross-polarized transmitted light). 3. Basaltic texture of the chilled margin in diabase (Sample 180-1109D-41R-3, 63-69 cm) (cross-polarized transmitted light). 4. Preserved magmatic texture in fine-grained diabase (Sample 180-1109D-51R-4, 6-9 cm) (plane-polarized transmitted light). 5. Poorly preserved magmatic texture in Site 1114 brecciated diabase (Sample 180-1114A-35R-1, 24-27 cm) (plane-polarized transmitted light). 6. Retrogressed and deformed diabase at Site 1114 (plane-polarized transmitted light). Cpx = clinopyroxene, Plg = plagioclase, Glau = glaucony, Chl = chlorite, Calc = calcite, oxi = iron oxide.