Slate is a fine-grain sedimentary rock created through low-grade regional metamorphism which can be found across North Wales. The quarrying of slate dominated the economy of the region during the second half of the 19th century, essentially a Welsh-speaking industry most of the workforce in the main slate-producing areas were drawn from the immediate surroundings, each quarry had one or more cabins where the quarrymen gathered for their lunch break and was the scene of wide-ranging discussions of the issues of the day. Slate has been used and is still used extensively in Wales, predominantly to roof the houses and to form the headstones of the local population.