What is a train of vein material mixed with rubbish; fragments of ore which have become separated by the action of water or the weather, and serve to direct in the discovery of mines. [Written also shode.] called?

shoad — A train of vein material mixed with rubbish; fragments of ore which have become separated by the action of water or the weather, and serve to direct in the discovery of mines. [Written also shode.]. (Webster's 1913.)