Saturday, July 30, 2011
ringing stone". This is a granodiorite erratic boulder, which was carried here by the ice during the Ice Age. Its rock is geologically recent but it sits on the ancient gneiss of the Tiree foreshore. Fortunately graniodiorite is very hard, because generations of tourists have thrown other rocks at it to make it ring. 4,000 years ago the locals were made of sterner stuff and managed to carve multiple cup marks on its surface. Unfortunately the wind and swell made it impossible to land on the rocky shore.