Figure F9. Contact between altered spinifex-textured xenolith (left) and altered dacite host (right) in Sample 193-1188A-7R-2 (Piece 1, 17–21 cm; CSIRO 142652). Despite complete alteration to clay and permeation by anhydrite, the microfabric is preserved of a former marginal outgrowth of plagioclase laths from xenolith into host (compare Fig. F6, ). Width of view = 5 mm; (A) ordinary light, (B) crossed polarizers.

Figure F9. Contact between altered spinifex-textured xenolith (left) and altered dacite host (right) in Sample 193-1188A-7R-2 (Piece 1, 17–21 cm; CSIRO 142652). Despite complete alteration to clay and permeation by anhydrite, the microfabric is preserved of a former marginal outgrowth of plagioclase laths from xenolith into host (compare Fig. F6). Width of view = 5 mm; (A) ordinary light, (B) crossed polarizers.