Figure F91. Close-up photograph of late magmatic vein in coarser-grained portion of Unit 1256C-18. White rim of vein consists of granophyric intergrowth of quartz and albite, and center of vein is filled with saponite (black) and minor pyrite (interval 206-1256C-9R-5, 90-100 cm).

Figure F91. Close-up photograph of late magmatic vein in coarser-grained portion of Unit 1256C-18. White rim of vein consists of granophyric intergrowth of quartz and albite, and center of vein is filled with saponite (black) and minor pyrite (interval 206-1256C-9R-5, 90-100 cm).