Fig. 4: Bright-field transmission electron microscope (TEM) image of recovered quartz disc prepared by focused ion beam preparation.

The image shows abundant amorphous lamellae parallel to basal, rhombohedral, and prismatic planes in quartz compressed along the c-axis (vertical in the image). The viewing direction is along the [0\(\bar{1}\)10] direction, i.e. vertical to the compression direction.