Figure F100. Breccia with fragments of pervasively altered volcanic rock, cemented by coarse anhydrite, quartz and minor pyrite. Note the different colors and the sharp boundaries of the fragments. (cf. Fig. F102, ).

Figure F100. Breccia with fragments of pervasively altered volcanic rock, cemented by coarse anhydrite, quartz and minor pyrite. Note the different colors and the sharp boundaries of the fragments. (cf. Fig. F102).