Granite

ASBK#ATQ 3030 018

ASBK#ATQ 3030 018

BDMG#WJT

BDMG#WJT

603G#FGR

603G#FGR

BLCK#HND

BLCK#HND

603G#CHS

603G#CHS

612G#FLM

612G#FLM

603G#FLM

603G#FLM

603G#CHS

603G#CHS

612G#BHM

612G#BHM

612G#CHS

612G#CHS

635G#FLM

635G#FLM

635G#POL

635G#POL

654#CHS

654#CHS

654G#BHM

654G#BHM

603G#BHM

603G#BHM

654G#FLM

654G#FLM

682G#CHS

682G#CHS

682G#FGR

682G#FGR

BLCK#FGR

BLCK#FGR

ADSF#FLM 3030 018

ADSF#FLM 3030 018

612G#BHM

612G#BHM

682G#FLM

682G#FLM

603G#POL

603G#POL

AZAR#SAT

AZAR#SAT

BDMG#WJT

BDMG#WJT

439G#POL

439G#POL

603G#POL

603G#POL

BLNT#POL

BLNT#POL

BGGR#POL

BGGR#POL

BPGR#POL

BPGR#POL

CIAN#POL

CIAN#POL

HNGN#POL

HNGN#POL

EMPG#POL

EMPG#POL

GLCL#POL

GLCL#POL

BTBG#POL

BTBG#POL

IRED#POL

IRED#POL

LRBA#POL

LRBA#POL

MGCG#POL

MGCG#POL

GTGN#SAT

GTGN#SAT

LRSV#POL

LRSV#POL

IPRG#POL

IPRG#POL

PANG#POL

PANG#POL

ORBV#POL

ORBV#POL

MRDG#POL

MRDG#POL

PDVD#FLM

PDVD#FLM

RBOL#ATQ

RBOL#ATQ

SPPC#POL

SPPC#POL

VDUB#POL

VDUB#POL

TBRG#POL

TBRG#POL

UCDM#POL

UCDM#POL

WWHT#POL

WWHT#POL

YLOW#POL

YLOW#POL

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Granite


Granite 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.