Plate 3. Selected key textural relationships in the pelitic and migmatite gneiss. 6. Late irregular spongy porphyroblast of cordierite (Cd) including quartz, fibrolite, and ilmenite, which define the main foliation in the rock. Cordierite is largely transformed to pinnite. Large idiomorphic andalusite porphyroblast (A) is oriented parallel to the main foliation. Sample 161-976B-101R-1, 86-89 cm. Plane-polarized light. Scale bar is 500 µm.