What is granite?

  • (noun): Plutonic igneous rock having visibly crystalline texture; generally composed of feldspar and mica and quartz.
    See also — Additional definitions below

Granite

Granite ( /ˈɡrænɨt/) is a common widely occurring type of intrusive, felsic, igneous rock which is granular and crystalline in texture. This rock consists mainly of quartz, mica, and feldspar. Occasionally some individual crystals (phenocrysts) are larger than the groundmass, in which case the texture is known as porphyritic. A granitic rock with a porphyritic texture is sometimes known as a porphyry. Granites can be pink to gray in color, depending on their chemistry and mineralogy. By definition, granite is an igneous rock with at least 20% quartz by volume. Granite differs from granodiorite in that at least 35% of the feldspar in granite is alkali feldspar as opposed to plagioclase; it is the alkali feldspar that gives many granites a distinctive pink color. Outcrops of granite tend 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 usually found in the continental plates of the Earth's crust.

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Some articles on granite:

British Quarrying And Mining Narrow Gauge Railways - Stone Quarrying and Mining - Granite
... Ceiriog Granite Quarries railway 2 ... ft (610 mm) Criggion, Wales Internal quarry system worked by a single steam locomotive until 1921, when it was replaced by cable-haulage ... Charnwood Granite Quarries railway 1850s 2 ... ft (610 mm) Shepshed, England Early horse worked quarry system steam locomotives introduced in late 1890s, replaced by internal combustion. 2 ft (610 mm) Stanton under Bardon, England Hauled stone from the Cliffe Hill Granite Quarry ...
Granite, Maryland
... Granite is an unincorporated community in Baltimore County, Maryland, United States ... known as Waltersville, it was renamed Granite in recognition of its principal product (the Woodstock Quartz Monzonite was quarried) ... The Granite Historic District was listed on the National Register of Historic Places in 1994 ...
List Of Colossal Sculpture In Situ - Americas
... cliff tombs at Revash, Peru Mount Rushmore, United States – granite Crazy Horse Memorial, United States – pegmatite granite - work in progress Stone Mountain, United States – granite ...
Carreg Yr Imbill
... Carreg yr Imbill—in English Gimlet Rock or sometimes Gimblet Rock—is the remains of a large granite outcrop and quarry at Pwllheli, Gwynedd, Wales ... The granite was mined by the Liverpool and Pwllheli Granite Company (sometimes known as the Pwllheli Granite Company), which used the granite for stone setts to pave the streets ...
St Carantoc's Church, Crantock - External Features
... Also in the churchyard are a granite cross dating from the 19th century which is set on a granite base probably dating from before the Norman Conquest, and stocks dating from the 17th ...

More definitions of "granite":

  • (noun): Something having the quality of granite (unyielding firmness).
    Example: "A man of granite"

Famous quotes containing the word granite:

    We placed the wreaths upon the splended granite sarcophagus, and at its feet, and felt that only the earthly robe we loved so much was there. The pure, tender, loving spirit which loved us so tenderly, is above us—loving us, praying for us, and free from all suffering and woe—yes, that is a comfort, and that first birthday in another world must have been a far brighter one than any in this poor world below!
    Victoria (1819–1901)

    Paper is soft and ink is fluid; it might be better if some pages of this chronicle could be written on chips of granite at the point of steel.
    E. M. Almedingen (b. 1898–?)

    Your wits can’t thicken in that soft moist air, on those white springy roads, in those misty rushes and brown bogs, on those hillsides of granite rocks and magenta heather. You’ve no such colours in the sky, no such lure in the distances, no such sadness in the evenings. Oh the dreaming! the dreaming! the torturing, heart-scalding, never satisfying dreaming, dreaming, dreaming, dreaming!
    George Bernard Shaw (1856–1950)