The rock history of Ireland’s stone lifters

The rock history of Ireland’s stone lifters

Prof Murray Gray on the origin of the boulders used in the sport of stone lifting, and Mo Heard on her great-great-great-grandfather’s work as a ‘ballast-getter’Your article on the ancient sport of stone lifting in Ireland (14 February) didn’t explain the historic origin of the rocks. Most of these boulders are glacial erratics, eroded and transported by Irish ice sheets during which the rocks have their edges worn down as they grind against oth…