Figure F33. Photomicrograph showing green amphibole (acicular) and chlorite (fibrous, anomalous interference colors) formed on a triple junction between two plagioclase and a clinopyroxene grain in gabbronorite (Sample 209-1268A-27R-1, 64–66 cm) (crossed polarized light: blue filter; field of view = 1.4 mm; image 1268A_041).