Figure 8From: Nanoquartz in Late Permian C1 coal and the high incidence of female lung cancer in the Pearl River Origin area: a retrospective cohort study Dark-field images of quartz embedded in soot emissions from coal combustion. Highlighted area in (a) is expanded to (b). Insertion in (b) shows the SAED pattern of quartz from an area of 1 μm.Back to article page