Microtexture of dolomite within exsolved magnesian calcite — examples from the Damara orogen (Namibia)

Exsolved magnesian calcite grains containing rods of dolomite were etched to remove the calcite matrix and investigated with a scanning electron microscope. The rods were found to be composed of small rhombohedral dolomite crystals. The single rhombohedrons are stacked with the threefold axis subparallel in all rods of the exsolved host crystal. The curvature of exsolution rods in the host is due to a step by step displacement of the single rhombohedrons.