Figure F19 (continued). B. Digital photomicrograph (plane-polarized light) of brecciated metadolerite (Sample 180-1114A-33R-1, 67-69 cm) showing a subhorizontal fault crosscut by a subvertical fault. These faults (arrows) crosscut the original brecciated fabric of the rock and previous vein (vein) contemporaneous to the brecciation. Note the decreased grain size and clay matrix within the crosscutting faults. Refer to "Structural Geology" in the "Site 1114" chapter for more details.