Iron springs

We live on the spring line where water that has penetrated the sandstone comes up against the thick layer of Wealden clay and can progress no further - the water bubbles up out of the ground and flows over the surface, the iron oxide staining the stream bed and sides bright orange. This particular spring is very reliable, in thirty years I've never known it to stop flowing and the iron content must be particularly high (the site of a medieval bloomery is close by). When it snows the orange staining is even more prominent.