Limestone - Wikipedia
Limestone is a type of carbonate sedimentary rock.It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO 3).A closely related rock is dolomite, which contains a high percentage of the mineral dolomite, CaMg(CO 3) 2.In old USGS publications, dolomite was referred to as magnesian limestone, a term now reserved for magnesium,how is limestone extracted - BINQ Mining,After limestone is quarried it is used for building stone, cement, lime Quarrying is the extraction of rocks and other materials from the earth's surface by blasting. Frequently quarried materials include sand, gravel and limestone.How is Limestone obtained? Is it mined or extracted,,03-02-2007· Limestone is mined. The cheapest way to get it is to use the limestone rock closest to the surface. Most commonly, that involves quarrying, in which you dig a hole and build a road for trucks to carry the rock out. A lot of limestone gets used, so there are many quarries, wherever limestone is at or close to the surface.