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Granite - Properties and Usage
Granite is a standard and widely occurring type of intrusive, felsic, igneous rock. Granite has a medium to coarse texture, sometimes with some individual crystals larger than the groundmass forming a rock known as porphyry. Granites will be pink to dark gray and even black, depending on their chemistry and mineralogy. Outcrops of granite are inclined to form tors, and rounded massifs. Granites typically happen 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 however it should intrude other rocks. Most granite intrusions are emplaced at depth within the crust, normally greater 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 different schemes of classification. Classification schemes are regional; there is a French scheme, a British scheme and an American scheme. This confusion arises because the classification schemes define granite by completely different means. Typically, the 'alphabet-soup' classification is used because it classifies based on genesis or origin of the magma.
Ancient Uses of Granites
Granite is almost always large (lacking inside structures), hard and hard, 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 uncovered granite surfaces, is the third largest of Egyptian pyramids. Menkaure's Pyramid, was constructed of limestone and granite blocks. The Nice Pyramid of Giza contains an enormous 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 primary corridor of the Egyptian Museum in Cairo.
Many massive Hindu temples in southern India have been made of granite. There's a large amount of granite in these structures. They're 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 increasing amounts 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 can also be a well-liked selection for kitchen countertops on account of its high durability and aesthetic qualities.
Engineers have traditionally used polished granite surfaces to establish a airplane of reference, since they are comparatively impervious and inflexible. Sandblasted concrete with a heavy aggregate content material has an appearance much like rough granite, and is commonly used as a substitute when use of real granite is impractical. Because of the particular rarity of the granite, the very best stones can price as much as US$1,500.
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