Figure 5. Botryoidal calcite completely filling a small vein in Sample 149-899B-16R-2, 102-105 cm. Variations in density of inclusions during growth of radial fibers result in concentric zones of inclusions. Subsequent fractures at the botryoid terminations are filled by clear, sparry calcite, which is continuous with fibrous veins in the wall. Clasts within the breccia are encircled by the fibrous veins. A. Plane-polarized light photomicrograph. B. Interpretive sketch.