Why Do Larger Crystals Form When A Magma Cools Slowly Instead Of Rapidly?
Why Do Larger Crystals Form When A Magma Cools Slowly Instead Of Rapidly? The size of crystals produced depends on the rate at which the magma cools. If cooling is very slow, minerals have lots of time to grow, and so large crystals are produced. If cooling is rapid, little time is available for growth,