Naturally deformed quartzo-feldspathic rocks
Figure caption
weak deformation (Mulwaree) / strong deformation (Mulwaree) / mylonites (Redbank) / ultramylonites (Redbank)
80
Detail of quartzo-feldspathic mylonite, dextral shear.
High magnification view of the quartzo-feldspathic mylonite shown in photo #79. Quartz forms partially recrystallized long ribbons and feldspar porphyroclasts show a range of sizes reflecting progressive grain-size reduction by fracturing. The imbricated nature of feldspar porphyroclasts is consistent with a dextral sense of shear. (495-4A)