Igneous rocks

There are rocks that are formed by the solidification of molten material under the earth’s crust called magma. These materials are under extreme liquid pressure and heat. The azure rocks are divided into three categories according to how the molten material comes out and freezes. The first category of internal or all crystals in this category of molten material begins to cool slowly at a great distance from the earth’s surface, so its grains become crystalline and crystalline, such as diorite, deiteite and Granite.

The second group of external azure stones or crystalline grains. In this group of stones, the molten material is slowly cooled, but before it hardens completely, it is transferred to the upper and cold parts of the earth. Thus, some of the stones are grains. It has a crystalline state and the part that has cooled rapidly does not have a crystalline state.

The third group of volcanic rocks. In this case, the molten material quickly moves to the cold air and freezes, so it is not crystalline. The bazaar of this type is Azrin stones. This group of rocks, which cool rapidly in free air, freezes in the form of rock or rock puddles. The second group of sedimentary rocks This group of rocks is formed from the accumulation and joining of sedimentary layers, the remains of animals and plants on the earth’s surface. Coal, limestone and sandstone are among these rocks.

The third group of stones sometimes turn into a completely new and different stone due to pressure and heat, which are called metamorphic rocks. This group of rocks includes quartzite, which is made of metamorphic metamorphic rock, and marble, which is called metamorphic rock. He named limestone and shale, which are derived from the transformation of clay.