Limestone is a sedimentary rock that is often used in construction as a building material. It is often found in various types of architecture as well as in roadbeds and in the manufacturing of cement. Limestone was mostly used in buildings during the late 19th and early 20th centuries. Since it is a heavy material, it is not ideal for use in the construction of tall buildings. It is strong however, and can withstand a humid climate.
Limestone can be found in various forms, and these have many industrial uses. Chalk, a type of saltwater limestone created by ancient organisms, can be used to write on the board in classrooms. When limestone is crushed into a fine dust, it can clean out unwanted elements from molten metals and power plant exhaust. Furthermore, limestone functions as a filler in products ranging from paper and paint to calcium supplements and cereals. Limestone can even serve as an aesthetically-pleasing element. Groundwater dripping from limestone can create elegant stalactites, stalagmites and columns in caves, serving as a point of interest for people visiting places like Carlsbad Caverns.
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