Limestone is a sedimentary rock composed primarily of calcium carbonate (CaCO3) in the form of the mineral calcite. Most limestones form in shallow, calm, warm marine waters.
Some limestones can form by direct precipitation of calcium carbonate from marine or fresh water. Limestones formed this way are chemical sedimentary rocks.
Limestone can also form through evaporation. Limestone is by definition a rock that contains at least 50% calcium carbonate in the form of calcite by weight. All limestones contain at least a few percent other materials.
Applications Of Limestone :-
1. Most limestone is made into crushed stone and used as a construction material.
2. It is fired in a kiln with crushed shale to make cement.
3. It is used as an aggregate in concrete.
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