Naturally deformed quartz-rich rocks
			Figure caption
	Naturally deformed quartz-rich rocks		undeformed / semibrittle & bulging recrystallization / subgrain rotation recrystallization / grain boundary migration recrystallization
28			Chert deformed at greenschist conditions, showing that dynamic recrystallization can produce an increase in grain size. Chert from Pilbara, Western Australia, deformed at greenschist conditions. Dynamic recrystallization has resulted in coarsening of the quartz grain size. The foliation is defined by the alternation of recrystallized chert and transposed and recrystallized quartz veins (largest grain sizes). White mica pins the quartz boundaries in the chert, but in the layers of large quartz grain size, micas are contained within individual quartz grains. These microstructural relations indicate grain boundary migration in dislocation creep regime 3. (606 A)