The higher fellsides are also rich in mineral deposits and were formerly mined extensively. A typical site situated just above the Middle Tongue Beck at NY 692/321 is known as the New Greuve Shop and seems to have yielded a variety of minerals ranging from coal to lead. This level is of particular interest as a large rock above the entrance has been inscribed with the initials of some of the miners. Some of these belong to families whose descendants still live in Milburn. The largest mine in the area, Silver Band, is outside Milburn Parish but was a major source of employment in the village. Miners would walk to work—a journey taking about two hours in each direction and involving a climb from Milburn of around 800 metres.