This heavily weathered rock lays at the meeting point of four moors. Ilkley Moor, Burley Moor, Morton Moor and Bingley Moor (thanks Dave). Cup and ring carvings were recorded in the 19th C, but these have now weathered away and no trace remains.
Paul Bennett describes the rock as an 'Omphalus' or a universal centre. It's name probably comes from it's use by medieval masons. It was also used as a meeting point for the Pendle Witches.
Said to have been a moot point for the Masons, and the Pendle Witches, standing on the border of four moors. The rock was reported as bearing cup n' ring marks in the 19th C, which have now presumably weathered away.