Naturally deformed quartz-rich rocks
Figure caption
undeformed / semibrittle & bulging recrystallization / subgrain rotation recrystallization / grain boundary migration recrystallization
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Chert deformed and recrystallized at greenschist conditions; grain growth was greater in pure quartz regions.
Chert from Pilbara, Western Australia, deformed at greenschist conditions. The patchiness of quartz grain sizes persists through the early stages of deformation and dynamic recrystallization, and is enhanced by the greater grain growth in regions of more pure quartz. (110)