Lisdrumgormley Lead Mines
County Monaghan, Ireland
The Lisdrumgormley Lead Mines are a deposit in Ireland that was mined for lead as early as the 1840s. The underground workings consisted of narrow, 1.5m-wide slopes above a northwest–southeast-trending level. It was the subject of further exploration during the mid-1950s when the original shaft was reopened to a depth of 21 meters.
Mine data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).