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Extrusive igneous rock is formed from rapidly cooled lava at Earth's surface.

Examples are obsidian and basalt.

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8y ago

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Related Questions

Molten rocks that cool at the earths surface are known as?

Lava.


What rock takes the longest time to cool of?

Igneous rocks that cool under the Earth's surface. They are called intrusive rocks.


What is it called when cool air is trapped under earths surface?

A temperature inversion.


How are rocks formed in a volcanic eruption?

They are formed when the erupted magma or lava, cool and sollidifies below or above the earths surface respectively.


The Igneous rocks that form under the surface?

Igneous rocks that form under the surface are called intrusive or plutonic rocks. These rocks cool slowly beneath the Earth's surface, allowing for the formation of large mineral crystals. Examples include granite, diorite, and gabbro.


What is igneous rocks that form below Eart's surface are called?

Igneous rocks that form below the Earth's surface are called intrusive or plutonic rocks. These rocks cool and solidify slowly, allowing large mineral crystals to form. Examples include granite and diorite.


Magma that has reached the earths surface?

When magma reaches the Earth's surface, it is called lava. Lava can flow out of a volcano during an eruption and can cool to form igneous rocks. The characteristics of the lava, such as its temperature and composition, can influence the type of volcanic eruption that occurs.


How does metamorphic rocks turn into a igneous rocks?

If it finds its way dowm into the earths crust through rock cycle and then is melted and mixes together to form molten magma, it could re-erupt to the earths surface and form an extrusive igneous rock or cool and solidify within the earths crust as an intrusive igneous rock.


Which igneous rocks form below earth's surface?

Igneous rocks that form below the Earth's surface are called intrusive igneous rocks. Examples include granite, diorite, and gabbro. These rocks cool and solidify slowly, allowing large crystals to form.


Is all igneous rock formed from lava that cooled on Earths surface?

No, not all igneous rock is formed from lava that cooled on Earth's surface. Some igneous rocks are formed from magma that cooled below the surface, and these are called intrusive igneous rocks. These rocks cool more slowly than lava, allowing for larger mineral crystals to form.


Igneous rocks that cool quickly on earth surface are?

Igneous rocks that cool quickly on the Earth's surface are called extrusive or volcanic rocks. Examples include basalt, obsidian, and pumice. These rocks have fine-grained textures due to their rapid cooling.


What are igneous rocks that form above the earth called?

Igneous rocks that form above the earth's surface are called extrusive igneous rocks. These rocks cool and solidify quickly due to the rapid cooling environment of the Earth's surface, resulting in fine-grained textures. Examples include basalt and rhyolite.