Figure 25

Naturally deformed quartz-rich rocks

Figure caption

Naturally deformed quartz-rich rocks

undeformed / semibrittle & bulging recrystallization / subgrain rotation recrystallization / grain boundary migration recrystallization

25

Less micaceaous Heavitree quartzite; note larger, equant recrystallized grains.

The recrystallized grain size is limited by the larger mica grains, although quartz boundaries were able to migrate past smaller mica grains. The distribution of small micas might indicate the characteristic recrystallized grain size at an earlier stage of the deformation-recrystallization. Dislocation creep regime 3. (249 A)

		Naturally deformed quartz-rich rocks
		Figure caption

	Naturally deformed quartz-rich rocks	undeformed / semibrittle & bulging recrystallization / subgrain rotation recrystallization / grain boundary migration recrystallization


25		Less micaceaous Heavitree quartzite; note larger, equant recrystallized grains. The recrystallized grain size is limited by the larger mica grains, although quartz boundaries were able to migrate past smaller mica grains. The distribution of small micas might indicate the characteristic recrystallized grain size at an earlier stage of the deformation-recrystallization. Dislocation creep regime 3. (249 A)