Figure F8. Sawn surface of jasperoid Sample 193-1189B-6R-1 (Piece 5, 45–55 cm; CSIRO 142707; see Fig. F1B), showing altered perlitic wallrock fragments and conspicuous cavities. Pale smoky quartz forms selvages around the wallrock fragments and also occurs as patches surrounding drusy cavities (far left). The smoky quartz selvage to the lower wallrock fragment also extends internally as an apparently replacive vein. Disseminated pyrite is scarce.