Naturally deformed quartzo-feldspathic rocks
Figure caption
weak deformation (Mulwaree) / high deformation (Mulwaree) / mylonites (Redbank) / ultramylonites (Redbank)
69
Detail of granodiorite weakly deformed at mid greenschist conditions.
Higher magnification view of the sample shown in photo #70, illustrating incipient recrystallization of quartz and biotite. Feldspar is undeformed at this low strain (the feldspar clast to the left of the image still shows igneous zoning). Quartz grains contain subgrains and some show core and mantle structures indicating the beginning of dynamic recrystallization by subgrain rotation (dislocation creep regime 2).