Extrusive: meaning, definitions and examples
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extrusive
[ ɛkˈstruːsɪv ]
geology process
Extrusive refers to igneous rock that has solidified on the surface of the Earth, as opposed to intrusive rocks that solidify beneath the surface. Extrusive rocks are formed from lava that cools quickly upon exposure to air or water. They typically exhibit a fine-grained texture due to rapid cooling.
Synonyms
outpouring, surface, volcanic.
Examples of usage
- Basalt is an example of an extrusive rock.
- The explosive eruption resulted in a significant amount of extrusive material.
- Volcanic glass is another type of extrusive rock.
- The island is primarily composed of extrusive formations.
Translations
Translations of the word "extrusive" in other languages:
🇵🇹 extrusivo
🇮🇳 बाहर निकालने वाला
🇩🇪 extrusiv
🇮🇩 ekstrusi
🇺🇦 екструзивний
🇵🇱 ekstrudywny
🇯🇵 押出成形の
🇫🇷 extrusif
🇪🇸 extrusivo
🇹🇷 ekstrüde
🇰🇷 압출의
🇸🇦 خارجي
🇨🇿 extruzivní
🇸🇰 extruzívny
🇨🇳 挤出的
🇸🇮 ekstrudiran
🇮🇸 útrás
🇰🇿 экструзиялық
🇬🇪 ექსტრუზიული
🇦🇿 ekstrüziv
🇲🇽 extrusivo
Etymology
The term 'extrusive' comes from the Latin word 'extrudere,' which means 'to thrust out.' It was first used in geological contexts to describe rocks that are formed from lava that has erupted onto the surface of the Earth. This classification distinguishes between extrusive igneous rocks, which cool quickly and solidify on the Earth's surface, and intrusive igneous rocks, which cool slowly beneath the ground. The understanding of these processes has evolved significantly since the late 18th century when geologists began to study the formation of rocks more systematically. As research in geology progressed, the significance of differentiating between extrusive and intrusive rocks became clearer, aiding in our understanding of volcanic activity and the Earth’s geological history.