Deformed chert, Warrawoona Syncline. Very strong macroscopic foliation and lineation. Grain size coarsening is a function of quartz purity, the quartz veins showing the largest grain size. Recrystallized quartz grains are elongate oblique to the main foliation, in a manner consistent with top-to-the-left (south) sense of shear . (Sample 119 A, chert, Pilbara, Western Australia) (3.2 mm)