Why Would Granite Have Larger Crystals Than Igneous Rocks

Intrusive igneous rocks have cooled slowly from magma extrusive rocks have.

Why would granite have larger crystals than igneous rocks.

I think igneous rock have a larger crystal than all the others because igneous rock is all the way at the bottom of. Phenocrysts are minerals that solidified earlier than the rest of the rock and they are important clues to the rock s history. All magma develops underground in the lower crust or upper mantle because of the intense heat there. Igneous rocks can have many different compositions depending on the magma they cool from.

Why would granite have larger crystals than igneous rocks formed from lava cooled above earth s surface 1055913. It depends on the type of igneous rock. In many igneous rocks large mineral crystals float in a fine grained groundmass. The crystals in granite being intrusive in nature will be larger than those in basalt an extrusive igneous rock.

The large grains are called phenocrysts and rock with phenocrysts is called a porphyry that is it has a porphyritic texture. Crystals that form on the surface are tiny because they cooled very quickly. Intrusive igneous rocks have cooled slowly from magma extrusive rocks have. Why would granite have larger crystals than igneous rocks formed from lava cooled above earth s surface.

The more time crystals have to form the more likely they are going to be larger in size. 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. The crystals in granite being intrusive in nature will be larger than those in basalt an extrusive igneous rock. Intrusive igneous rocks such as granite have large crystals extrusive igneous rocks may have small crystals as in basalt or no crystals as in pumice.