Figure F12. Thin section photomicrograph showing the core of an orthopyroxene crystal pseudomorphed by talc and pyrite. The core is surrounded by a corona of pleochroic serpentine. Pseudomorphic talc and pleochroic serpentine are replaced by late, nonpseudomorphic talc (bottom) (Sample 209-1268A-13R-2, 3–6 cm) (cross polarized light: blue filter; field of view = 2.75 mm; image 1268A_016).