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extrusive
(redirected from Extrusive (geology))

   Also found in: Wikipedia 0.01 sec.
ex·tru·sive  (k-strsv, -zv)
adj.
1. Tending to push or thrust out.
2. Tending to protrude or project.
3. Derived from magma poured out or ejected at the earth's surface. Used of igneous rocks.

extrusive [ɪkˈstruːsɪv]
adj
1. tending to extrude
2. (Earth Sciences / Geological Science) (of igneous rocks) formed from magma issuing from volcanoes or cracks in the earth's crust; volcanic Compare intrusive [2]
ThesaurusLegend:  Synonyms Related Words Antonyms
Adj.1.extrusive - of rock material; forced out while molten through cracks in the earth's surface
geology - a science that deals with the history of the earth as recorded in rocks
intrusive - of rock material; forced while molten into cracks between layers of other rock


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