Figure F9. Typical fabric of relatively coarse grained jasperoid in Sample 193-1189B-6R-1 (Piece 2, 13–15 cm), comparable with CSIRO Sample 142697 at 45–55 cm (see Fig. F8, p. 17), showing interlocking quartz grains with sharply defined cores containing numerous inclusions of tiny hematite flakes. Some cores display shapes resembling subhedral, doubly terminated quartz prisms. Strain extinction in some clear quartz overgrowths suggests growth interference. Width of view = 1.4 mm. A. Ordinary light. B. Crossed polarizers.

Figure F9. Typical fabric of relatively coarse grained jasperoid in Sample 193-1189B-6R-1 (Piece 2, 13–15 cm), comparable with CSIRO Sample 142697 at 45–55 cm (see Fig. F8), showing interlocking quartz grains with sharply defined cores containing numerous inclusions of tiny hematite flakes. Some cores display shapes resembling subhedral, doubly terminated quartz prisms. Strain extinction in some clear quartz overgrowths suggests growth interference. Width of view = 1.4 mm. A. Ordinary light. B. Crossed polarizers.