Figure 8. Massive, fibrous calcite intimately intergrown and apparently replacing primary chlorite in Sample 149-899B-18R-5, 58-62. A. Plane-polarized light photomicrograph demonstrating that the fibrous habit of the calcite appears to mimic that of the chlorite, to the extent that kinks in the chlorite are preserved. Calcite also occurs as small beads apparently nucleating within and at the margins of the chlorite fragments. B. Interpretive sketch of the same view.