Types of rocks

Types of rocks

This report is expected to explain the formation, the imporatance and the caracteristics of the three more comoun types of rocks in the earth.

   Igneous rock

Igneous rocks are formed by the solidification of magma (undergrownd melted rock), when magma emerge from the underground the temperature of this one get lower untill it solidificates. This type of rock are mostly found in oceans or near divergent movements of plates techtonics. The uses for igneous rocks are construction because of the durabilty and the strong or also there are many minerals extracted from this rock.

Sedimentary rock

The sedimentary rock is produced by the compactation and sementation of rocks which pices fall off or where erosioned by air, water, ice or gravity; thats way we can found them in the upper part of earth crust . They are mostly used for highway constructions, buildings, or even for chalks in schools.

Metamorphic rocks

Metamorphic are mostly found in montainous parts of the earth crust;  they are produced by proces in wich de molecular structure of a rock change with the help of heat and preasure. Metamorphic rocks are mostly used for roof material, decorative stones (garden), building material and sculpture material.

As a conclusion we can see that  rocks are more important than what we thought, if there where no rocks most of the things that we know now a days as buildings, highways,etc. Would not exist and this will bring lot’s of problems or changes