Figure F40. A. Close-up photograph of typical troctolite from the 28.3- to 34.1-mbsf interval in Hole 1275B, showing prominent plagioclase-rich domains that may be interpreted as melt impregnation features (interval 209-1275B-6R-2, 104–112 cm). B. Photomicrograph showing the plagioclase (p) in troctolite is typically separated from the surrounding olivine (ol) by a corona of chlorite (c), amphibole (a), and talc + magnetite (arrow). (Sample 209-1275B-6R-2, 57–61 cm) (cross-polarized light: blue filter; field of view = 2.75 mm; image 1275B_011). C. Photomicrograph of coronitic textures in troctolite. Coronas of chlorite and talc (arrows) develop in the contact between plagioclase and olivine (Sample 209-1275B-6R-1, 70–75 cm) (cross-polarized light: blue filter; field of view = 11 mm; image 1275B

Figure F40. A. Close-up photograph of typical troctolite from the 28.3- to 34.1-mbsf interval in Hole 1275B, showing prominent plagioclase-rich domains that may be interpreted as melt impregnation features (interval 209-1275B-6R-2, 104–112 cm). B. Photomicrograph showing the plagioclase (p) in troctolite is typically separated from the surrounding olivine (ol) by a corona of chlorite (c), amphibole (a), and talc + magnetite (arrow). (Sample 209-1275B-6R-2, 57–61 cm) (cross-polarized light: blue filter; field of view = 2.75 mm; image 1275B_011). C. Photomicrograph of coronitic textures in troctolite. Coronas of chlorite and talc (arrows) develop in the contact between plagioclase and olivine (Sample 209-1275B-6R-1, 70–75 cm) (cross-polarized light: blue filter; field of view = 11 mm; image 1275B_007).