GENERAL GEOLOGY

Detailed explanation-1: -Intrusive, or plutonic, igneous rock forms when magma is trapped deep inside the Earth. Great globs of molten rock rise toward the surface.

Detailed explanation-2: -These are called intrusive igneous rocks because the magma has intruded into pre-exiting rock layers. Types of intrusive igneous rocks are granite and basalt.

Detailed explanation-3: -Intrusive or extrusive. Intrusive (plutonic) rocks form when magma solidifies within the crust below the surface. It usually cools slowly and produces large crystals. Extrusive (volcanic) rocks form when magma erupts onto the surface of the Earth as lava flows, and usually cools quickly producing small crystals.

Detailed explanation-4: -Which igneous rocks are intrusive? Diorite, granite, pegmatite are intrusive igneous rocks.