The land area of Scotland is 30,414 square miles (78,770 km2), with the mainland of Scotland having 6,160 miles (9,910 km) of coastline. The physical features of Scotland having been formed by the action of tectonic plates, and later erosion arising from glaciation. The beauty of the towering mountains, shimmering lochs, deep glens and rolling hills owe much to the force of ice that sculptured Scotland's landscapes during the last 'Ice Age'. Wearing it down, the smoothing and shaping of bedrock, transporting and depositing rock debris.