Naturally deformed quartz-rich rocks
Figure caption
undeformed / semibrittle & bulging recrystallization / subgrain rotation recrystallization / grain boundary migration recrystallization
17
Relatively undeformed Heavitree quartzite containing some fine-grained mica.
Relatively undeformed Heavitree Quartzite of Sheet 1. Weak foliation oriented NE-SW defined by fine micas grown in the pressure shadows of quartz grains. Some quartz grains consist of a detrital grain over which quartz cement has grown in the same crystallographic orientation. (59 A)