On a recent tour of the west coast of Scotland my wife and I followed for a time the Rock Route, learning something along the way of the geological past. Tectonic plates colliding, mountain ranges thrown up, mighty glaciers – it sounded a spectacular show to anyone who happened to be there at the time. But of course, I realised, these events happen so slowly they would be imperceptible, even over a thousand generations. In fact they haven’t stopped. The world is still as active a place as it has ever been, the land is even now in constant motion, and I’ve tried to incorporate that idea into this landscape.