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extrusivePertaining to igneous rocks or features formed from lava released on the Earth’s surface.
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extrusive1816, from Latin extrus-, past participle stem of extrudere "thrust out; drive away" (see extrusion) + -ive. Related: Extrusively.
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extrusiveDescribing igneous rocks that are formed at the surface of the earth as a result of the solidifying of magma.
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extrusivelit. forced out. In geography, applied to volcanic material that reaches the surface. May be lava, pyrolclasts or gases.
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extrusive(adj) - outside
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extrusive(adj) of rock material; forced out while molten through cracks in the earth's surface
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extrusiveA type of igneous rock formed on Earth's surface (Lesson 27)
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extrusiveIgneous rocks
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extrusiveIgneous rocks that cool and solidify rapidly at or very near the Earth's surface. Also known as volcanic rocks. more details...
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extrusivedescribes igneous rocks that have been formed by solidification of magma on or above the Earth's surface.
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