Xenolith

All Sources -
Updated Media sources (1) About encyclopedia.com content Print Topic Share Topic
views updated

xenolith An inclusion or enclave of a preexisting rock in an igneous rock. Xenoliths are often derived from the country rocks that have been invaded by the igneous mass, and they frequently show some evidence of reaction, e.g. rounding of their edges and metamorphism.

views updated

xen·o·lith / ˈzenəˌli[unvoicedth]; ˈzēnə-/ • n. Geol. a piece of rock within an igneous rock that is not derived from the original magma but has been introduced from elsewhere, esp. the surrounding country rock.