Question

Definition of Intrusive rock.​

Answer 1

Answer:

Intrusive rock is formed when magma penetrates existing rock crystallizes and solidifies under ground to form intrusions for example plutons batholiths dikes sills laccoliths and volcanic necks.

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Answer 2

Answer:

What Are Intrusive Rocks?

• Intrusive rocks are a type of igneous rock. Igneous rocks are rocks that form from cooled magma. Intrusive rocks are igneous rocks that form from crystallized magma beneath the earth's surface. The other main category of igneous rocks is extrusive rocks, which are igneous rocks formed on the surface.

• Intrusive rock, also called plutonic rock, igneous rock formed from magma forced into older rocks at depths within the Earth’s crust, which then  slowly solidifies below the Earth’s surface, though it may later be exposed by erosion. Igneous intrusions form a variety of rock types. See also extrusive rock.