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Granite is a typical and widely occurring type of intrusive, felsic, igneous rock. Granite has a medium to coarse texture, often with some individual crystals bigger than the groundmass forming a rock known as porphyry. Granites could be pink to dark gray or even black, relying on their chemistry and mineralogy. Outcrops of granite are likely to form tors, and rounded massifs. Granites sometimes occur in circular depressions surrounded by a range of hills, formed by the metamorphic aureole or hornfels.

Granite is an igneous rock and is formed from magma. Granitic magma has many potential origins but it should intrude other rocks. Most granite intrusions are emplaced at depth within the crust, normally larger than 1.5 kilometers and as much as 50 km depth within thick continental crust. The origin of granite is contentious and has led to assorted schemes of classification. Classification schemes are regional; there’s a French scheme, a British scheme and an American scheme. This confusion arises because the classification schemes define granite by totally different means. Usually, the ‘alphabet-soup’ classification is used because it classifies based mostly on genesis or origin of the magma.

Ancient Makes use of of Granites

Granite is almost always huge (lacking internal structures), hard and difficult, and therefore it has gained widespread use as a development stone. The Red Pyramid of Egypt, named for the light crimson hue of its exposed granite surfaces, is the third largest of Egyptian pyramids. Maleskaure’s Pyramid, was constructed of limestone and granite blocks. The Great Pyramid of Giza accommodates an enormous granite sarcophagus fashioned of “Red Aswan Granite.” The largely ruined Black Pyramid dating from the reign of Amenemhat III once had a elegant granite pyramidion or capstone, now on display in the main hall of the Egyptian Museum in Cairo.

Many massive Hindu temples in southern India have been made of granite. There may be a large amount of granite in these structures. They are comparable to the Great Pyramid of Giza

Granites Use in Present age

Granite has been extensively used as a dimension stone and as flooring tiles in public and commercial buildings and monuments. With growing quantities of acid rain in parts of the world, granite has begun to supplant marble as a monument materials, since it is much more durable. Polished granite can be a popular selection for kitchen countertops attributable to its high durability and aesthetic qualities.

Engineers have traditionally used polished granite surfaces to ascertain a airplane of reference, since they’re relatively impervious and inflexible. Sandblasted concrete with a heavy combination content material has an appearance similar to rough granite, and is often used as a substitute when use of real granite is impractical. Because of the particular rarity of the granite, the most effective stones can cost as a lot as US$1,500.

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