Figure F18. Close-up view of variation of altered orthopyroxene porphyroclasts (in light gray) in an altered harzburgite. Note that modal orthopyroxene is highest between 73 and 76 cm (interval 209-1270C-1R-1 [Piece 11, 69–81 cm]). Figure F17 shows an image from a thin section at 72–75 cm.