Luisa Hendry on Instagram: "These wee square holes in the rock? Once home to shiny pyrite (“fool’s gold”) cubes. But thanks to contact metamorphism from the nearby igneous intrusion, the pyrite altered… and eventually weathered away. All that’s left are these boxy wee ghosts. Nature’s way of leaving a calling card at Ballachulish Quarry #geology #geologist #scottishgeology #scottishgeologist #visitscotland @scotrockwalks"