Granites are felsic intrusive igneous rocks whose textures are phaneritic and granular. In Baltimore granite rocks vary a lot in their color depending on mineralogy. Some examples of colors include white, gray, and pink. The name granites derives from granum, which is the Latin word for grain. The name grain is inspired by the coarse-grained structure the rock has. Any intrusive igneous rock with a coarse-grained texture to granites and a slightly different origin or composition is described as granitic.
Granites are classified basing on QAPF diagram for plutonic rocks with coarse grains. The percentage of quartz, plagioclase feldspar, and alkali feldspar forms the basis for naming. Alkali feldspar granite are granitoids that lack or contain only trivial amounts of plagioclase.
Granitoids that are composed of less than ten percent orthoclase are called tonalites. Tonalite commonly contain amphibole and pyroxene. Granites that contain both biotite and muscovite micas are referred to as two-mica or binary granites. Binary granites contain large amounts of potassium and trivial amounts of plagioclase. Binary granites are also usually A-type or S-type granites.
Granites occur as outcrops that form rounded massifs and tors. At times, granites occur in circular depressions that are surrounded by hill ranges formed by hornfels. This rock is also common in continental plates in the crust of the earth. This rock is currently known to be present on earth alone. The distribution of granites in the crust is wide. Its intrusion into the crust is known to have occurred during all the geologic periods.
The origin of the granite industry lies in the ancient Egypt. Worldwide, this is among the oldest industries. The production and export of these rocks is done in many countries. Key exporters are Spain, China, Italy, Brazil, Canada, Germany, Sweden, and India. Exports are directed to many countries and they earn exporters huge foreign exchanges. Various industries find use for granites, including engineering, building and construction, and sculptures and memorials.
The use of granites for gravestones and memorials is a common practice in many places worldwide. Carving granites requires great skill because they are very hard stones. The results achieved from carving the stone before the 18th century were very poor because only hand tools were available by then. Today, the carving process has been revolutionized by the presence of steam-powered cutting and dressing tools among other modern tools.
Today, several different rock-carving methods have been invented. Sandblasting and computer-controlled rotary bits are among these methods. Through the use of these methods, it is quite easy to create complex artworks and epitaph. In building, granites make flooring tiles and dimension stones. The flooring tiles made are commonly installed in commercial or public buildings and monuments.
Rock climbers prize granites very highly because they offer soundness, steepness, friction, and crack systems. Some of the most popular venues for granite climbing in the world are Yosemite, the Aiguille du Midi, Adamello-Presanella Alps, the Bugaboos, and the Cornish coast. Artificial rock climbing walls in theme parks and gyms are often made to resemble granites.
Granites are classified basing on QAPF diagram for plutonic rocks with coarse grains. The percentage of quartz, plagioclase feldspar, and alkali feldspar forms the basis for naming. Alkali feldspar granite are granitoids that lack or contain only trivial amounts of plagioclase.
Granitoids that are composed of less than ten percent orthoclase are called tonalites. Tonalite commonly contain amphibole and pyroxene. Granites that contain both biotite and muscovite micas are referred to as two-mica or binary granites. Binary granites contain large amounts of potassium and trivial amounts of plagioclase. Binary granites are also usually A-type or S-type granites.
Granites occur as outcrops that form rounded massifs and tors. At times, granites occur in circular depressions that are surrounded by hill ranges formed by hornfels. This rock is also common in continental plates in the crust of the earth. This rock is currently known to be present on earth alone. The distribution of granites in the crust is wide. Its intrusion into the crust is known to have occurred during all the geologic periods.
The origin of the granite industry lies in the ancient Egypt. Worldwide, this is among the oldest industries. The production and export of these rocks is done in many countries. Key exporters are Spain, China, Italy, Brazil, Canada, Germany, Sweden, and India. Exports are directed to many countries and they earn exporters huge foreign exchanges. Various industries find use for granites, including engineering, building and construction, and sculptures and memorials.
The use of granites for gravestones and memorials is a common practice in many places worldwide. Carving granites requires great skill because they are very hard stones. The results achieved from carving the stone before the 18th century were very poor because only hand tools were available by then. Today, the carving process has been revolutionized by the presence of steam-powered cutting and dressing tools among other modern tools.
Today, several different rock-carving methods have been invented. Sandblasting and computer-controlled rotary bits are among these methods. Through the use of these methods, it is quite easy to create complex artworks and epitaph. In building, granites make flooring tiles and dimension stones. The flooring tiles made are commonly installed in commercial or public buildings and monuments.
Rock climbers prize granites very highly because they offer soundness, steepness, friction, and crack systems. Some of the most popular venues for granite climbing in the world are Yosemite, the Aiguille du Midi, Adamello-Presanella Alps, the Bugaboos, and the Cornish coast. Artificial rock climbing walls in theme parks and gyms are often made to resemble granites.
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