Plate 1. Selected key textural relationships in the high-grade schist. 1. D₂ fold in a biotite-rich high-grade schist. Sillimanite and biotite define S₂ parallel to the axial surface of the fold. Note on the lower left corner the early plagioclase porphyroblasts with dark graphitic inclusions defining the previous foliation S₁. Sample 161-976E-23R-2, 118-123 cm. Plane-polarized light. Scale bar is 500 µm.