Figure F6. Photomicrographs showing altered orthopyroxene. A, B. Porphyroclast with deformation in the right part (contact with serpentinized olivine) (Sample 209-1268A-4R-1, 12–15 cm) (plane-polarized light: blue + light gray filters; field of view = 5.5 mm); (A) image 1268A_012; (B) image 1268A_013. C, D. Anhedral to interstitial orthopyroxene in serpentinized olivine matrix. Note that the orthopyroxene has been converted to bastite (Sample 209-1268A-4R-1, 124–127 cm) (field of view = 5.5 mm); (C) plane-polarized light: blue filter; image 1268A_008; (D) cross-polarized light: blue filter; image 1268A_009. E. Orthopyroxene transformed to pleochroic serpentine cut and locally replaced along cleavage planes by massive nonpseudomorphic talc. A talc vein also cuts chrysotile veins associated with background alteration (Sample 209-1268A-12R-3, 71–75 cm) (cross-polarized light: blue + light gray filters; field of view = 2.75 mm; image 1268A_019). F. Interstitial grains of orthopyroxene in a serpentinized olivine matrix (Sample 209-1268A-5R-2, 58–61 cm) (plane-polarized light: blue filter; field of view = 5.5 mm; image 1268A_010).