books.google.co.uk - Britain's mining and quarrying industries date back to the Stone Age flint mines of 2500 BC and still exist. In that period of more than 4,000 years the country's miners have produced colossal amounts of copper, tin, lead, zinc, iron, a lot of silver and some gold, and smaller amounts of just about every...http://books.google.co.uk/books/about/The_Riches_Beneath_our_Feet_How_Mining_S.html?id=TEUay-S7aN0C&utm_source=gb-gplus-shareThe Riches Beneath our Feet:How Mining Shaped Britain
