Naturally deformed quartz-rich rocks
Figure caption
undeformed / semibrittle & bulging recrystallization / subgrain rotation recrystallization / grain boundary migration recrystallization
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Mica-rich Heavitree quartzite deformed at greenschist conditions by simultaneous subgrain rotation recrystallization and solution-reprecipitation.
In mica-rich quartzite of sheet 2, detrital quartz grains are flattened, stretched, and bent in a fine-grained quartz-mica matrix. Some quartz grains have undergone dissolution on ~E-W oriented grain boundaries but others have bent and flattened by regime 2 dislocation creep. A NE-SW shear band deforms the dominant foliation and indicates top-to-the-left sense of shear. (704 A)