Characteristics Of Granite Igneous Rocks

It is a hard crystalline rock which is very resistant to erosion.

Characteristics of granite igneous rocks.

Streak is the color of rock when it is crushed or powdered. From this rock stone is cut for building purposes. Granite is an igneous rock that can be found in either the earth s crust or above ground. Intrusive or plutonic rocks e g granite are directly formed from the magma and cooling process occurs below the earth s surface.

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. Granite is a light colored igneous rock with grains large enough to be visible with the unaided eye. The black colors are likely two or three different minerals. Rocks with hardness 1 3 are soft rocks from 3 6 are medium hardness rocks and 6 10 are hard rocks.

The different colors are unique minerals. Granite is composed mainly of quartz and feldspar with minor amounts of mica amphiboles and other minerals. Characteristics of granite granite is made up of three minerals. Granites are the example of the plutonic intrusive igneous rocks which are formed deep within the earth.

The streak of granite is white whereas its fracture is not available. For countertops the granite blocks are cut into granite slabs. If magma cools slowly deep within the crust the resulting rock is called intrusive or plutonic. Intrusive igneous rock are also referred to as plutonic igneous rock.

The hardness of granite is 6 7 whereas its compressive strength is 175 00 n mm 2. Granite is made up of mostly quartz and feldspar. They cool down and solidify quickly producing small crystals in the process. Granite is a classic coarse grained phaneritic intrusive igneous rock.

Igneous rocks can be intrusive or extrusive depending upon how the rocks are formed. The main processes that affect it are freeze. Quartz feldspar and mica. In classifying igneous rocks significant 5 quartz is the defining characteristic.

Examples are gabbro graniteand pegmatite. As molten rock called magma below the surface cools the liquid cloth starts to solidify into minerals of differing sizes and compositions. It is an intrusive igneous rock. They are igneous rocks that form when molten magma erupts on top of the earth s surface.

Most of the rest is feldspar either plagioclase or potassium feldspar. That determines what subtype of granitic rock it is granite granodiorite quartz monzonite etc the dark minerals are commonly biotite mica amphibole rarely pyroxene.