Page 204 - Microtectonics

194 7 · Porphyroblasts and Reaction Rims

Fig. 7.6. Skeletal rim of a garnet porphyroblast (detail of Fig. 7.32) showing how quartz crystals of the strain shadow are incorporated
into the growing crystal as slightly elongated inclusions. The curvature of S i is caused by relative rotation between the porphyroblast and
the matrix foliation (cf. Fig. 7.32). Baños, Ecuador. Width of view 2 mm. Polars at 45°

Fig. 7.7. Quartz-rich schist with elongate staurolite crystal (dark crystal in the centre) that grew along a mica-rich layer. Folding of the
layering and layer-parallel foliation was probably later than the growth of the staurolite that contains a straight inclusion pattern. Pyr-
enees, Spain. Width of view 12 mm. Polars at 45°