Figure 24A | Table of Contents

Figure 23. Photomicrograph in plane-polarized light of anhydrite-pyrite vein with pyrite surrounding anhydrite. Note the fine-grained pyrite at the outer fringes of the gray halo of silica around the veins (Sample 193-1188A-7R-2 [Piece 2, 39–41 cm]; field of view = 1.40 mm).