However, rather than having been formed at oceanic ridges, the Parys deposit is thought to have been formed in an island arc volcanic environment. There has been recent exploration work at the site proving new complex ore deposits at depth, containing as well as copper - gold, lead and zinc. This was facilitated using a 1000' deep shaft with prominent headgear. At present, mining is not economically viable, but the shaft is being kept open on a care and maintenance basis in case metal prices recover. 1.5km of passage are currently accessible, the remainder being flooded.
Access is gained via a drift in the vicinity of the pits.
As on the Great Orme, ancient Bronze Age workings have been discovered, and the hope is to enter more of these by working up from below. There are also mines and shafts near the sea to the east. The following list was provided by Tony Oldham , and is taken from his book The Caves and Mines of Anglesey.