Figure F32. Close-up photograph of two nearly parallel subvertical fractures lined with iron oxyhydroxides and calcite from Unit 1 (Sample 200-1224F-3R-2, [Piece 8, 56.5-71.5 cm]). The fractures were first lined with iron oxyhydroxides then widened and filled with calcite. This surrounds small bits of iron oxyhydroxide that broke from the vein walls when the fracture widened. A later calcite-lined fracture diagonally crosses the larger fractures. Note the dark alteration stain next to the subvertical fracture on the right.

Figure F32. Close-up photograph of two nearly parallel subvertical fractures lined with iron oxyhydroxides and calcite from Unit 1 (Sample 200-1224F-3R-2, [Piece 8, 56.5-71.5 cm]). The fractures were first lined with iron oxyhydroxides then widened and filled with calcite. This surrounds small bits of iron oxyhydroxide that broke from the vein walls when the fracture widened. A later calcite-lined fracture diagonally crosses the larger fractures. Note the dark alteration stain next to the subvertical fracture on the right.