Igneous rocks which have invaded a pre-existing rock. Intrusive rocks are formed by magma that has solidified beneath the surface of the Earth.
Synonyms and Related Terms
plutonic; roche intrusive (Fr.); rocha intrusiva (Port.)
Sources Checked for Data in Record
- Submitted information Comment: José Delgado Rodrigues, LNEC, 2009.
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971