Hell's Cleugh at Stobswood

Hell’s Cleugh, Stobswood – a remote steep-sided cleugh in the Lammermuirs where a small stream has cut a valley into a red-brown rock called the Great Conglomerate. The conglomerates are iron-rich rocks composed of rounded pebbles or cobbles with a matrix of sand grains and were deposited in arid landscapes by large rivers during flash floods about 400 million years ago.