Igneous Rock And Granite

Igneous rocks are formed from the solidification of molten rock material.

Igneous rock and granite. Igneous rocks are formed from the solidification of magma which is a hot 600 to 1 300 c or 1 100 to 2 400 f molten or partially molten rock material. Granites can be predominantly white pink or gray in color depending on their mineralogy the word granite comes from the latin granum a grain in reference to the coarse grained structure of such a completely crystalline rock. It forms from the slow crystallization of magma below earth s surface. It is the most common plutonic rock of the earth s crust forming by the cooling of magma silicate melt at depth.

Granite is a type of igneous rock that consists of quartz gray plagioclase feldspar white and alkali feldspar beige plus dark minerals such as biotite and hornblende. Feldspar quartz amphiboles and pyroxenes together called dark minerals by geologists as well as olivine along with the softer mineral mica. Granite is composed mainly of quartz and feldspar with minor amounts of mica amphiboles and other minerals this mineral composition usually gives granite a red pink gray or white color with dark mineral. Granite is an igneous intrusive rock crystallized at depth with felsic composition rich in silica and predominately quartz plus potassium rich feldspar plus sodium rich plagioclase and phaneritic subeuhedral texture minerals are visible to the unaided eye and commonly some of them retain original crystallographic shapes.

Granite is used by the public as a catchall name for any light colored coarse grained igneous rock. The main minerals in igneous rocks are hard primary ones. Intrusive igneous rocks crystallize below earth s surface and the slow cooling that occurs there allows large crystals to form. The two best known igneous rock types are basalt and granite which have distinctly different compositions and textures.

Granite coarse or medium grained intrusive igneous rock that is rich in quartz and feldspar. All magma develops underground in the lower crust or upper mantle because of the intense heat there. Igneous rocks can have many different compositions depending on the magma they cool from. Learn more about the properties and uses of granite in this article.

Strictly speaking granite is an. Granite ˈ ɡ r æ n ɪ t is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture. What are igneous rocks. Igneous rocks form when magma molten rock cools and crystallizes either at volcanoes on the surface of the earth or while the melted rock is still inside the crust.

There are two basic types.