The mine at The Bog and the adjacent Stiperstones outcrop were only viable because of a geological movement; over time the movement of the tectonic plates landed at this site, combined with the movement of the earth it crumpled the layers and the softest layers were then eroded away. After mining stopped, the undisturbed remnants provided a range of wildlife habitats: birds nest in the old buildings, bats roost in the old mine tunnels, and reservoirs and ponds are ideal for aquatic life.