Notes on the Preferred Orientation of Calcite Porphyroblasts

In a calcareous gneiss showing porphyroblastic texture, (0001) poles of calcite porphy-roblasts concentrate more than those of matrix calcite. In a green schist and a quartz-calcite layer of green schist, having porphyroblasts of calcite, the (0001) pole figures of calcite porphyroblasts show random or weak preferred orientation. The former case can be interpreted to be the result of secondary recrystallization.