Compare the conditions for the formation of granite and basalt. How do the conditions of their formation

Compare the conditions for the formation of granite and basalt. How do the conditions of their formation affect the size of the crystals?

Granite and basalt have a lot in common, being rocks of volcanic origin. Granite is an intrusive rock, which means that on its way to the surface, magma was trapped in the deep layers of the earth’s crust, and it probably took a long time for it to cool down and crystallize into solid rock. The long crystallization time allows the minerals to form and grow, resulting in a hard rock with a coarse-grained structure, in which the individual mineral grains are clearly distinguishable. Basalt is an erupted rock. When a volcano erupts, hot magma breaks through the earth’s crust and pours out onto the surface, forming basalt. Due to the magma pouring out onto the surface of the earth (and very often under water), it does not take long for it to cool, and the minerals have little chance of forming and growing. Therefore, basalt in the earth’s crust is usually a very fine-grained rock.