Cheesewring Tor in Cornwall is a granite extrusion. The magma pushed up through rock and solidified. The softer rock eroded away over millions of years leaving a granite column that was wind and rain eroded into this shape. The glaciers didn't reach this far south so we have rock structures much older than the glaciated formations further north.The wind rain and frost shape columns into stacks of lens shaped forms that eventually separate and tumble. The Cheeswring quarry provided the granite for London Bridge. The quarrying was stopped close to the cheeswring to protect it.