Page 57 - Microtectonics

3.9 · Competing Processes During Deformation 45

Fig. 3.27. Quartz grain with deformation lamellae (top left to lower right) and subgrain boundaries (subvertical) transected by bands of new grains
(lower left to top right) formed by bulging (BLG)-recrystallisation. Quartz vein in micaschist. Southern Alps, Italy. Width of view 1.8 mm. CPL

Fig. 3.28. Typical fabric of dynamic recrystallisation in quartz. Relicts of large old quartz grains with undulose extinction and elongate subgrains pass
laterally into domains of small, new grains formed by bulging (BLG) recrystallisation. St. Barthélemy, Pyrenees, France. Width of view 1.8 mm. CPL