Aragón is one of the autonomous communities of Spain with greatest wealth in its sub-soil. Mineral resources for very diverse uses can be found beneath it´s surface. Of particular note are the coal deposits located in the mining basins of Oliete, Utrillas-Aliaga and Mequinenza, mined primarily for use in thermal power stations.
Due to both the variety and type of existing mining operations, Aragón is a market leader in the extraction of non-metallic minerals such as clay, specifically special clays that are used in the manufacture of household and industrial absorbent granular and refractory clays, which in turn are used to manufacture ceramic tiles, flooring and bathrooms.
Another of the non-metallic minerals extracted in Aragón and which is notable for its strategic importance, is halite (rock salt), used in the production of chlorine and lye, and the greatest concentration of which is found in Remolinos, and in lower quantities in some areas of the province of Huesca.
Also worthy of mention is the extraction of metallic minerals. Today they are almost a historical legacy but there is still the odd mine in existence. In the past, the extraction of iron ore from Sierra Menera was of enormous importance to this area, which in turn supplied the iron and steel industry of Sagunto.