Extrusive

Extrusive refers to the mode of igneous volcanic rock formation in which hot magma from inside the Earth flows out (extrudes) onto the surface as lava or explodes violently into the atmosphere to fall back as pyroclastics or tuff. This is as opposed to intrusive rock formation, in which magma does not reach the surface. The main effect of extrusio...
Found on http://en.wikipedia.org/wiki/Extrusive

extrusive

[adj] - (geology) of rock material
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Extrusive

• (a.) Forced out at the surface; as, extrusive rocks; -- contrasted with intrusive.
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extrusive

adjective of rock material; forced out while molten through cracks in the earth`s surface
Found on https://www.encyclo.co.uk/local/20974

Extrusive

(igneous) rocks formed by eruptions at the Earth's surface (see volcanic).
Found on https://www.geolsoc.org.uk/ks3/gsl/education/resources/rockcycle/page3451.h

Extrusive

Ex·tru'sive adjective [ See Extrude .] (Geol.) Forced out at the surface; as, extrusive rocks; -- contrasted with intrusive .
Found on http://www.encyclo.co.uk/webster/E/98

extrusive

extrusive 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; a reference to igneous rocks. 4. Noting or pertaining to a class of igneous rocks that have been forced out in a molten or plastic condition upon the surface of the earth.
Found on http://www.wordinfo.info/words/index/info/view_unit/2193/

Extrusive

Igneous rocks that crystallize at Earth's surface.
Found on http://www.encyclo.co.uk/local/22392

extrusive

Igneous. Antonym of intrusive.
Found on http://www.ucmp.berkeley.edu/glossary/gloss2geol.html

extrusive

Igneous. Antonym of intrusive.
Found on http://www.ucmp.berkeley.edu/glossary/glossary_2.html

Extrusive

mode of igneous volcanic rock formation in which hot magma from inside the Earth flows out (extrudes) onto the surface as lava or explodes violently into the atmosphere to fall back as pyroclastics or tuff.
Found on http://en.wikipedia.org/wiki/Glossary_of_geology

extrusive

Pertaining to igneous rocks or features formed from lava released on the Earth
Found on https://www.encyclo.co.uk/local/22327

extrusive

relating to lava -- i.e., magma ejected out onto the Earth's surface; also applied to volcanic rocks formed from lava.
Found on https://www.encyclo.co.uk/local/20132

extrusive

Rocks that form on the surface from molten lava. Antonym of intrusive.
Found on http://www.scientificpsychic.com/etc/geology-glossary.html

extrusive

Sunset Crater National Monument: a cinder cone, composed of extrusive rock. Credit: USGS Descriptive of igneous rocks that have erupted onto the surface. Extrusive, or volcanic, igneous rock is produced when magma exits and cools outside of, or very near the Earth's surface. These are the rocks ...
Found on http://www.daviddarling.info/encyclopedia/E/extrusive.html
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