Intrusive rocks are igneous rocks formed by emplacement of magma in pre-existing rocks.
(Intrusive rocks; are; igneous rocks formed by emplacement of magma in pre-existing rocks) (igneous rocks; formed; by emplacement of magma in pre-existing rocks)
Intrusive rocks igneous rocks
are formed
igneous rocks formed by emplacement of magma in pre-existing rocks
by emplacement of magma in pre-existing rocks