quarry

A quarry is a type of open-pit mine in which dimension stone, rock, construction aggregate, riprap, sand, gravel, or slate is excavated from the ground. The operation of quarries is regulated in some jurisdictions to manage their safety risks and reduce their environmental impact. The word quarry can also include the underground quarrying for stone, such as Bath stone. History Types of rock Types of rock extracted from quarries include: Chalk China clay Cinder Clay Coal Construction aggregate (sand and gravel) Coquina Diabase Gabbro Granite Gritstone Gypsum Limestone Marble Ores Phosphate rock Quartz Sandstone Slate Travertine