Above is a map of the Great Orme showing the layout of the different veins. The main veins worked by the miners were the four parallel ones running north to south, and the one in the Ty Gwyn Mine. The map also has the Ormesday Project information on it.
Information taken from the geological map of the Great Orme, after G.H.Morton 1898.
Base map supplied courtesy of The Mapping Company Ltd.