Shoad

n.1.(Mining) 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.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
"During the practice sessions we looked unbeatable catching small bream but on the two match days huge shoads of catfish moved in and the continental catfish experts cashed-in" said senior coach Mark Downes.