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Related to granitic: Pink granite


coarse-grained igneous rockrock,
aggregation of solid matter composed of one or more of the minerals forming the earth's crust. The scientific study of rocks is called petrology. Rocks are commonly divided, according to their origin, into three major classes—igneous, sedimentary, and metamorphic.
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 of even texture and light color, composed chiefly of quartz and feldspars. It usually contains small quantities of mica or hornblende, and minor accessory minerals may be present. Depending on the feldspar present, granite may be pink, dark gray, or light gray. It is commonly believed to have solidified from molten rock (called magma) under pressure. However, some granites show no contacts with surrounding wall rock, but instead gradually grade into metamorphic rock. Others show relic features found in sediments. This evidence suggests that some granites are not igneous in origin, but metamorphic. Some granites are the oldest known rocks on earth; others were formed during younger geologic periods. Crystallized at depth, granite masses are exposed at the earth's surface by crustal movement or by the erosion of overlying rocks. Very coarse-grained granite, called pegmatite, may contain minerals and gemstones of economic value. Such pegmatites are found in the Black Hills of South Dakota. Granite has been used since ancient times as a building material.


An igneous rock having crystals or grains of visible size; consists mainly of quartz and mica or other colored minerals.
See also: Stone



a magmatic rock rich in silica.

One of the most common rocks of the earth’s crust, granite is composed of potash feldspar (orthoclase, microcline), acid plagioclase (albite, oligoclase), quartz, mica (biotite or muscovite), amphibole, and, more rarely, pyroxene. The structure of granite is usually holocrystalline and frequently por-phyraceous and gneissoid-banded. It is predominant among intrusive rocks and occupies an essential place in the geologic structure of the Urals, the Caucasus, the Ukraine, Karelia, the Kola Peninsula, Middle Asia, and Siberia. Granitic intrusions date from the Archean and Cenozoic eras. Granite usually occurs in rocks in the form of batholiths, laccoliths, bosses, and veins. During the formation and cooling of the granitic bodies a regular system of joints arises; the jointing is. as a result, characteristically parallelepipedal, columnar, or sheetlike in natural exposures. The rounding of corners through weathering forms hammock jointing. The weathering of granite takes the form of disintegration or kaolinization. Deeper changes in the granite can be produced by pneumatolytic processes, resulting in the formation of greisen with lithia mica or tourmaline.

The origin of granite, in addition to its scientific interest, has great practical importance, since certain granitic bodies are associated with deposits of various valuable metals, such as tin, wolfram, molybdenum, lead, and zinc. Pegmatitic veins, which in certain cases are sources of rare-metal mineralization and high quality raw materials for ceramics (for example, feldspar, mica, and muscovite), are associated genetically with granite.

Because of its physical and mechanical properties, granite is an excellent building material. Its massiveness. density, and wide textural potentials (the ability to take on a mirrorlike polish, on which light brings out the play of colors of the ingrained mica, or the sculptural expressiveness of the unpolished rough stone, which absorbs light) make granite one of the basic materials for monumental sculpture. Granite is also used in obelisks, columns, and as a facing for many buildings. Most of the granite used in the USSR comes from quarries in the Ukraine, the Urals, and Karelia.


Levinson-Lessing, F. Iu. Izbrannye trudy, vol. 4: Petrografiia. 1955.
Menert, K. Novoe o probleme granitov. Moscow, 1963. Petrov, V. P. “Sovremennoe sostoianie predstavlenii o magme i problema granita.” Izv. AN SSSR: Ser. geol., 1964. no. 3.


A visibly crystalline plutonic rock with granular texture; composed of quartz and alkali feldspar with subordinate plagioclase and biotite and hornblende.


1. An igneous rock having crystals or grains of visible size; consists mainly of quartz, feldspar, and mica or other colored minerals.
2. In the building stone industry, a crystalline silicate rock having visible grains; this includes gneiss and igneous rocks that are not granite in the strict sense.


1. a light-coloured coarse-grained acid plutonic igneous rock consisting of quartz, feldspars, and such ferromagnesian minerals as biotite or hornblende: widely used for building
2. another name for a stone
References in periodicals archive ?
The most important granitic rocks in the Czech Republic occur mainly as Variscan intrusions (the absolute age of these intrusions is 340-250 Ma, measured by radiometry) (Chlupac et al.
2004; Michael and Lindenmayer 2008), field surveys targeted north-facing slopes within Granitic Hills Woodland and involved scanning logs, rocks and tree branches, inspecting tree hollows, hollow logs and rock crevices, and raking beneath shrubs and dense vegetation.
In the field, we collected 48 runoff samples from both volcanic and granitic sites and made composites for each site as needed for the analyses.
Specimens examined: SPAIN: Castilla y Leon, Avila: Puerto de Mijares, granitic outcrops close to the road AV-901, 1440-1570 m, 40[degrees]19'43" N, 4[degrees]49'22", 28-IV-2008, S.
The number of straight crystal faces was determined for kaolinite crystals in quartz--and clay-rich regolith and also for granitic and doleritic saprolite from Jarrahdale and compared with the API kaolinite No.
This configuration is more useful especially in the basaltic and granitic terrain.
Fault architecture and related distribution of physical properties in granitic massifs: geological and geophysical methodologies
Refinements in rubber formulas and shoe design mean that climbers can enjoy gecko-like adhesion to the coarse, grippy granitic rock at Joshua Tree.
The private toll road snakes its way around the granitic Monterey Peninsula and through the Del Monte Forest's signature cypress trees, contouring the spectacular wave-lashed coast for several miles.
The initial Nd and Sr isotopic composition of Paleozoic granitic rocks from Medial New England Terrane (MNET) and Composite Avalon Terrane (CAT) in Maine were investigated in order to characterize the source regions of the granitoids and constrain the subsurface distribution and timing of juxtaposition of these terranes.
They document petrochemical differences between two granitic suites, an earlier gold-generating suite which is comparable to intrusion-related gold systems elsewhere, and a slightly later, more evolved suite with characteristics of topaz-bearing granite.
No less than sixty 105 mm rounds were necessary to atomise the granitic enemy.