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. 6. Nontransformed, elongated staurolite porphyroblasts (St) with straight inclusion trails (rutile, ilmenite, and graphite) defining S₁. These trails are oblique to the external S₂ fabric, defined by oriented biotite, plagioclase, and sillimanite. Sample 161-976B-76R-1, 45-49 cm. Plane-polarized light. Scale bar is 200 µm.