Cathodoluminescence (CL) image of Penrith Sandstone

This quartz-rich sandstone was investigated for the effects of deformation band formation on hydrocarbon migration. The image shows a series of quartz grains exhibiting typical pressure solution textures and shows graphically that pressure solution is associated with microfracturing.

The image represents an area approximately 1.5 mm wide.

Image courtesy of Dr. Gordon Watt,

Department of Geology and Petroleum Geology, University of Aberdeen.