Figure F32. Photomicrograph showing that locally, pyroxene (px) is replaced by aggregates of brown amphibole. Here, brown amphibole formed on the margins and along the cleavage of a pyroxene crystal (arrow) (Sample 209-1270B-10M-1, 21–23 cm) (plane-polarized light: blue + light gray filters; field of view = 0.7 mm; image 1270B

Figure F32. Photomicrograph showing that locally, pyroxene (px) is replaced by aggregates of brown amphibole. Here, brown amphibole formed on the margins and along the cleavage of a pyroxene crystal (arrow) (Sample 209-1270B-10M-1, 21–23 cm) (plane-polarized light: blue + light gray filters; field of view = 0.7 mm; image 1270B_028).