What can you tell about igneous rock that is coarse grained? apex

Coarse-grained igneous rocks occur when large crystals grow while the magma cools, usually this type of purple is called intrusive igneous rock.

Explanation:

Igneous rocks (from the Latin ignis, "fire") are formed by the crystallization of magma, a mass of molten rock that originates deep in the crust and in the upper mantle, where temperatures reach 700 ° C or more, which are necessary to melt most of the rocks. As magma slowly cools down inside the Earth, microscopic crystals begin to form. As the magma cools below the melting temperature, some of these crystals have time to grow up to a few millimeters or more before the entire mass is crystallized as a coarse-grained igneous rock. But when magma is extruded from a volcano on the Earth's surface, it cools and solidifies so quickly that individual crystals do not have time to gradually grow. In this case, many tiny crystals form simultaneously, and the result is a fine-grained igneous rock.

Large crystals grow as the magma cools, producing coarse-grained rocks. The intrusive igneous rocks can be recognized by their large intercrossed crystals, which develop slowly while the magma is gradually cooled. Granite is an intrusive igneous rock.