Figure 7. Thin sections showing mylonitic (A and B) and ultramylonitic (C and D) fabrics from the Tuer cross section. (A) biotite-chlorite mylonitic schist, (B) actinolite schist, (C) and (D) ultramylonite. Several K-feldspar porphyroclasts are found in the ultramylonitic matrix composed of quartz-mica-feldspar.