The Best Of Igneous Rocks Get Free Download. Close up of granite an. Examples of such kind of rocks include pumice basalt or obsidian.
Identifying igneous rocks because their mineral grains grew together tightly as the melt cooled they are relatively strong rocks. All magma develops underground in the lower crust or upper mantle because of the intense heat there. 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.
Intrusive igneous rocks crystallize below earth s surface and the slow cooling that occurs there allows large crystals to form.
The melt originates deep within the earth near active plate boundaries or hot spots then rises toward the surface. Close up of granite an. Igneous rocks from the latin word for fire form when hot molten rock crystallizes and solidifies. Igneous rocks are divided into two groups intrusive or extrusive depending upon where the molten rock solidifies.
