1897 ‘M. Twain’ lxviii. 687 The gold fields of the world now deliver up to fifty millions dollars' worth of gold per year which would have gone into the tailing-pile under the former conditions.
1934 I. W. Hutchison vi. 54 Across the entrance of the valley..stretched the heaped ‘tailing-piles’, tippings of the huge gold-dredges.