4. Meaning of 'quarry'.

'Quarry' usually implies surface workings of minerals, leaving no roof overhead1. The manner in which the minerals are extracted is not, however, a conclusive test in distinguishing a quarry from a mine2. Thus in some circumstances surface workings are regarded as mines3, while 'quarry' may be used to denote workings for slate even where they are carried on almost exclusively underground4, although it has been held that a slate quarry worked by means of underground levels is a mine5. A sand or gravel pit may be a quarry, but workings in a heap of furnace slag are not6.

For the