Question: What causes streams that emerge from glaciers to be milk-colored? Need Assignment Help? View Available Hint(s)for Part C Air-borne dust that accumulates on a glacier surface over many years. The reflection of sunlight off of the suspended calcium carbonate ions in solution. Glaciers are made up of interlocking crystals of ice that flow like silly putty; therefore, glacial meltwater is viscous and milky. The presence of finely ground sediment called rock flour in the meltwater. Some glacial ice, particularly in Antarctica, is extremely old, which causes streams that emerge from these glaciers to be milky colored.