The yellow flowers of the gorse brighten the misty morning. A mist which hung around for the rest of the day. Gorse is also known by the name of whin because of its preference for growing where whinstone outcrops. Whinstone is a hard volcanic rock that makes up the Cleveland Dyke, an intrusion which originated 58 million years ago from a volcano centred on the Island of Mull off the west coast of Scotland and extends under the North Sea near Whitby. At Cliff Rigg whinstone was extensively mined in the late 19th century for making into setts, or cobbles, and aggregates for road making.