Characteristics Of Granite Igneous Rocks

The streak of granite is white whereas its fracture is not available.

Characteristics of granite igneous rocks.

Most of the rest is feldspar either plagioclase or potassium feldspar. Granite is made up of mostly quartz and feldspar. Streak is the color of rock when it is crushed or powdered. Rocks with hardness 1 3 are soft rocks from 3 6 are medium hardness rocks and 6 10 are hard rocks.

That determines what subtype of granitic rock it is granite granodiorite quartz monzonite etc the dark minerals are commonly biotite mica amphibole rarely pyroxene. Granite is an igneous rock that can be found in either the earth s crust or above ground. Igneous rocks can be intrusive or extrusive depending upon how the rocks are formed. Intrusive or plutonic rocks e g granite are directly formed from the magma and cooling process occurs below the earth s surface.

As molten rock called magma below the surface cools the liquid cloth starts to solidify into minerals of differing sizes and compositions. Igneous rocks are fashioned deep internal earth s crust intrusive rocks or on the floor extrusive rocks. For countertops the granite blocks are cut into granite slabs. Intrusive igneous rock are also referred to as plutonic igneous rock.

It is a hard crystalline rock which is very resistant to erosion. Since the rate of cooling and solidification of magmas inside the earth is very slow because of very high temperature prevailing under ground and hence granites become coarse grained due to full development of large sized grains. They cool down and solidify quickly producing small crystals in the process. It is an intrusive igneous rock.

From this rock stone is cut for building purposes. In classifying igneous rocks significant 5 quartz is the defining characteristic. If magma cools slowly deep within the crust the resulting rock is called intrusive or plutonic. It forms from the slow crystallization of magma below earth s surface.

Granite is a classic coarse grained phaneritic intrusive igneous rock. Granite is composed mainly of quartz and feldspar with minor amounts of mica amphiboles and other minerals. They are igneous rocks that form when molten magma erupts on top of the earth s surface. Granites are the example of the plutonic intrusive igneous rocks which are formed deep within the earth.

The hardness of granite is 6 7 whereas its compressive strength is 175 00 n mm 2. The different colors are unique minerals. Granite is a light colored igneous rock with grains large enough to be visible with the unaided eye. Quartz feldspar and mica.

Characteristics of granite granite is made up of three minerals. Generally the longer the cooling time the bigger the mineral crystals can grow.