Skip to main content
Select Source:

extrusion

extrusion In geology, the breaking-out of igneous rock from below the Earth's surface. Any volcanic product reaching the surface becomes extrusive material whether it is ejected through a volcano's cone or through pipe-like channels or fissures in its crust. In industry, extrusion is the forcing of metals or plastics at optimum temperature through a die to make rods, tubes and various hollow or solid sections.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"extrusion." World Encyclopedia. . Encyclopedia.com. 20 Jul. 2017 <http://www.encyclopedia.com>.

"extrusion." World Encyclopedia. . Encyclopedia.com. (July 20, 2017). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/extrusion

"extrusion." World Encyclopedia. . Retrieved July 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/extrusion

extrusion

extrusion The emission of magma from a vent or fissure on to the Earth's surface where it forms a lava flow. Gas is released quietly, rather than explosively, from the magma at the source vent and consequently there is little associated pyroclastic activity. Gas may also be vented from a different source, or extrusion may be of lava (magma) which has been degassed previously.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"extrusion." A Dictionary of Earth Sciences. . Encyclopedia.com. 20 Jul. 2017 <http://www.encyclopedia.com>.

"extrusion." A Dictionary of Earth Sciences. . Encyclopedia.com. (July 20, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/extrusion

"extrusion." A Dictionary of Earth Sciences. . Retrieved July 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/extrusion

extrusion

extrusionabrasion, Australasian, equation, Eurasian, evasion, invasion, occasion, persuasion, pervasion, suasion, Vespasianadhesion, cohesion, Friesian, lesion •circumcision, collision, concision, decision, derision, division, elision, envision, excision, imprecision, incision, misprision, precisian, precision, provision, scission, vision •subdivision • television • Eurovision •LaserVision •corrosion, eclosion, erosion, explosion, implosion •allusion, collusion, conclusion, confusion, contusion, delusion, diffusion, effusion, exclusion, extrusion, fusion, illusion, inclusion, interfusion, intrusion, obtrusion, occlusion, preclusion, profusion, prolusion, protrusion, reclusion, seclusion, suffusion, transfusion •Monaghan • Belgian •Bajan, Cajun, contagion, TrajanGlaswegian, legion, Norwegian, region •irreligion, religion •Injun • Harijan • oxygen • antigen •sojourn • donjon • Georgian •theologian, Trojan •Rügen •bludgeon, curmudgeon, dudgeon, gudgeon, trudgen •dungeon • glycogen • halogen •collagen • Imogen • carcinogen •hallucinogen • androgen •oestrogen (US estrogen) •hydrogen • nitrogen •burgeon, sturgeon, surgeon

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"extrusion." Oxford Dictionary of Rhymes. . Encyclopedia.com. 20 Jul. 2017 <http://www.encyclopedia.com>.

"extrusion." Oxford Dictionary of Rhymes. . Encyclopedia.com. (July 20, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/extrusion

"extrusion." Oxford Dictionary of Rhymes. . Retrieved July 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/extrusion