Granite is a plutonic rock in which quartz makes up between 10 and 50 percent of the felsic components and alkali feldspar accounts for 65 to 90 percent of the total feldspar content. Applying this definition requires the mineral identification and quantification abilities of a competent geologist.
Granite is a basic building block of the planet earth formed in a process that began billions of years ago. Its grains are crystallized and very finely textured, making it an extremely hard and durable natural stone recommended for kitchen countertops, bathrooms and furniture for the home.
Intense heat and pressure can also metamorphose granite into a banded rock known as "granite gneiss." This transformation is usually more of a structural change than a mineralogical transformation. Granite gneiss can also form through the metamorphism of sedimentary rocks.
The Granite Headstones you see in cemeteries are made from natural granite that was formed hundreds of millions of years ago from molten lava. After cooling, granite rock formations were formed throughout the world where many quarries are now established.
Granite's push to lower the company's debt, plus strong revenues from stations it owned put the broadcaster in a position to buy its second top 10 station in July 1998 for $173 million. "It was the year's highlight for me and for Granite," says Wills.
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Granite, a light-coloured igneous rock with large grains, is formed by the natural process. When the magma (molten rock) below the earth's surface cools and solidifies, granite is formed. It is the interlocking crystals that fuse together in any arrangement that gives the clue of the formation of rock from the molten material.
The first process, WEATHERING, produces the materials that a sedimentary rock is composed of by mechanical (freezing, thawing) and chemical (dissolution of minerals, formation of new minerals [clays]) interaction between atmosphere, hydrosphere and earth surface rocks.
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Stone quarrying is the multistage process by which rock is extracted from the ground and crushed to produce aggregate, which is then screened into the sizes required for immediate use, or for further processing, such as coating with bitumen to make bituminous macadam (bitmac) or asphalt.