Northern Ireland is a strong quarrying region with a very diverse geology. Craigantlet, in County Down, is blessed with a large deposit of High PSV gritstone and with its proximity to the Docks in Belfast, there is a lucrative supply line to the south of England and beyond.
Northern Ireland is one of the most diverse geological areas in the world for its size. The province has Lough Neagh at its centre with various rivers flowing into and out of it, the Upper and Lower Bann being the main river originating in the Mourne mountains, flowing through Lough Neagh to the north coast where it enters the North Atlantic ocean. Sand for the contracting and construction industries is dredged from Lough Neagh.