Limestone Facts

Limestone Facts
Limestone is a sedimentary rock that contains at least 50% calcium carbonate (CaCO3). Because sedimentary rocks are made of various types of sediments, the other 50% of a limestone rock could be virtually any other mineral. Limestone originates in wet areas which mean it could also be composed of shells and waste matter from organisms.
Interesting Limestone Facts:
Stalactites and stalagmites in caves are leftover limestone that remains after water evaporates.
You will rarely find limestone in its pure white nature because it almost always has some impurities.
Limestone can be found in just about any color depending upon which elements are combined with the calcium carbonate in the rock.
Limestone is often used in construction such as being added to paint as a thickening agent.
When roofing styles have texture, it is normally because of crushed limestone being added to the roofing tar.
Animals can largely benefit from having limestone in their diet so it is often added to their feed.
Limestone can most abundantly be found in the shallow ends of marine water.
Chalk is a type of limestone that contains mostly shells from marine animals.
During the 1700s, limestone was used for lithography which is when pictures are drawn on stones and then copied to other stones.
Because limestone contains the remains of dead organisms, it is considered an organic sedimentary rock.
There are rare chemical sedimentary rocks that form from the precipitation of calcium carbonate from ocean water.
Lithographic limestone is a type of limestone that contains fossils.
Powered limestone is used in coal mines as a safety precaution because it absorbs pollutants.
Limestone can also be used on roofs to prevent or reduce weather or heat related roof damage.
Limestone turns into the metamorphic rock marble when subjected to high amounts of pressure and heat.

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