Figure 3. Textural features of high-grade schists and gneisses. A. D1 isoclinal fold preserved as graphite inclusion trails within a staurolite porphyroblast. Plane-polarized light (interval 161-976B-21R-3 [Piece 1A, 33-38 cm]). B. Inclusion trails in garnet rim define type 2 opposedly concave microfolds (millipede structure). Matrix shows the S2 foliation. Plane-polarized light (interval 161-976E-14R-1 [Piece 3B, 40-45 cm]). C. Hercynite crystals surrounded by regions consisting of inclusion-free quartz, plagioclase and K-feldspar. D. D3 shear zone bordered by And porphyroblasts. Small And porphyroclasts occur within the shear zone. Crossed polars (interval 161-976B-95R-2 [Piece 1C, 22-25 cm]). E. Andalusite crystal overgrowing a microfold related to a S3 shear zone. Plane-polarized light; base of photograph 1.26 mm (interval 161-976B-101R-2 [Piece 1, 3-6 cm]).

Figure 3. Textural features of high-grade schists and gneisses. A. D₁ isoclinal fold preserved as graphite inclusion trails within a staurolite porphyroblast. Plane-polarized light (interval 161-976B-21R-3 [Piece 1A, 33-38 cm]). B. Inclusion trails in garnet rim define type 2 opposedly concave microfolds (millipede structure). Matrix shows the S₂ foliation. Plane-polarized light (interval 161-976E-14R-1 [Piece 3B, 40-45 cm]). C. Hercynite crystals surrounded by regions consisting of inclusion-free quartz, plagioclase and K-feldspar. D. D₃ shear zone bordered by And porphyroblasts. Small And porphyroclasts occur within the shear zone. Crossed polars (interval 161-976B-95R-2 [Piece 1C, 22-25 cm]). E. Andalusite crystal overgrowing a microfold related to a S₃ shear zone. Plane-polarized light; base of photograph 1.26 mm (interval 161-976B-101R-2 [Piece 1, 3-6 cm]).