What is a vent for extrusive igneous rocks?


What is a vent for extrusive igneous rocks?

Formation of Igneous Rocks:

Igneous rocks form as hot, liquefied rock begins to cool. They are classified by the method of their formation. The other two types of rocks, sedimentary and metamorphic, are also classified by how they form. Sedimentary rocks form from particles of other rocks that cement together while metamorphic rocks are physically changed from other rocks by extended periods of time exposed to heat and pressure.

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For extrusive igneous rocks, a vent is an opening in the ground through which lava can flow onto the surface of the Earth. This is key to defining...

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Lava Flow: Definition & Types


Chapter 4 / Lesson 7

Learn what lava flow is and the different types of lava that have been studied. Understand different lava compositions, such as felsic lava and mafic lava.

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