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Granite is a common and widely occurring type of intrusive, felsic, igneous rock. Granite has a medium to coarse texture, often with some individual crystals larger than the groundmass forming a rock known as porphyry. Granites may be pink to dark grey and even black, depending on their chemistry and mineralogy. Outcrops of granite are inclined 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 different rocks. Most granite intrusions are emplaced at depth within the crust, often larger than 1.5 kilometers and up to 50 km depth within thick continental crust. The origin of granite is contentious and has led to different 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 completely different means. Generally, the ‘alphabet-soup’ classification is used because it classifies based mostly on genesis or origin of the magma.

Historical Makes use of of Granites

Granite is sort of always massive (lacking inside constructions), hard and difficult, and due to this fact 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 contains a huge granite sarcophagus fashioned of “Red Aswan Granite.” The mostly ruined Black Pyramid dating from the reign of Amenemhat III once had a polished granite pyramidion or capstone, now on display in the principle hall of the Egyptian Museum in Cairo.

Many giant Hindu temples in southern India have been made of granite. There may be a considerable amount of granite in these structures. They’re comparable to the Nice 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 increasing quantities of acid rain in parts of the world, granite has begun to supplant marble as a monument materials, since it is way more durable. Polished granite is also a popular selection for kitchen countertops resulting from its high durability and aesthetic qualities.

Engineers have traditionally used polished granite surfaces to ascertain a aircraft of reference, since they are comparatively impervious and inflexible. Sandblasted concrete with a heavy aggregate content has an appearance just like tough granite, and is usually used as a substitute when use of real granite is impractical. Because of the particular rarity of the granite, the most effective stones can value as much as US$1,500.

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