Granite Portable Review in Urdu By Saftain Azmat

Granite

Granite / ɡrænɨt / rocks are a common type felsic igneous intrusive which is grainy in texture and phaneritic. The word "granite" comes from the Latin Qamha, grain, with reference to the coarse-grained structure of the rocks as holocrystalline. The term "Granite" also applies to a group of volcanic intrusive rocks with similar materials, and there are slight differences in the composition and origin. These rocks consist mainly of quartz and feldspar, mica and amphibole minerals that make up the matrix something equigranular feldspar and quartz lock with scattered biotite mica dark and vague (hornblende often) mineral spots color lighter. Sometimes individual crystals (phenocrysts) are larger than the groundmass, in which case the texture is known as sumac. Rock granite with porphyritic granite texture knows porphyritic. Bumps may be white, pink or gray often, depending on their minerals. By definition, granite is a volcanic rock with not less than 20% of quartz and alkali feldspar to 65% in terms of volume. granodiorita granite differs in that at least 35% of alkali feldspar granite is the opposite of plagioclase. It feldspar that gives many of the distinctive pink granite. And extrusive equivalent of granite igneous rocks are rhyolite.

Granite is almost always the Council of Ministers (lacking any internal structure), hard and tough, and it gained the use on a large scale in all of human history, most recently as a stone building. The average density of granite between 2.65 [1] and 2.75 g / CM3, resisting pressure greater than 200 MPa in general, and the viscosity is about 3-6 Ba • STP 1019. Avatar. [2] The melting point is 1215 or 1260 ° C (2219-2300 ° F). [3]

Granite has a low initial permeability but strong secondary permeability.

Granite is a term of firearms in scope and descriptive light-colored, and coarse. Check rocky to identify specific types of granite is required. [4]

The term "Granite" granitic rocks apply and the formation of granite or texture.

Rock known as the "black granite" are usually gabbro. [5]