Figure F128. A. Close-up photograph of a 2- to 3-mm-wide silica and saponite vein with narrower saponite veinlets (interval 206-1256D-22R-1, 86-123 cm). B. Close-up photograph of a large vug or vein lined with saponite (black) and filled with euhedral quartz (white) (interval 206-1256D-43R-2, 14-20 cm).

Figure F128. A. Close-up photograph of a 2- to 3-mm-wide silica and saponite vein with narrower saponite veinlets (interval 206-1256D-22R-1, 86-123 cm). B. Close-up photograph of a large vug or vein lined with saponite (black) and filled with euhedral quartz (white) (interval 206-1256D-43R-2, 14-20 cm).