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 porphyr

Plate 1. Selected key textural relationships in the high-grade schist. 5. Biotite porphyroblasts (B) closely related to harmonious fibrolite (S) defining the S₂ foliation. Note the occurrence of some fibrolite crystals with disharmonious textures. Sample 161-976B-77R-2, 40-44 cm. Plane-polarized light. Scale bar is 200 µm.