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Intrusive igneous rock is formed underground from slow cooling of magma. The resultant rock stays hot for long periods of time.

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What are Igneous rocks that cool quickly beneath Earth's crust called?

Igneous rocks that cool quickly beneath earth's crust are known as intrusive rocks. These rocks will form from magma which will cool and solidify quickly.


How quick does extrusive igneous rocks cool?

Intrusive igneous rocks cool slowly. These types of rocks would be located underground having long period of time to cool.


What is it called when igneous rocks cool quickly?

obsidian


Where does magma cool?

Magma cools and solidifies either underground within the Earth's crust, forming intrusive igneous rocks like granite, or when it erupts onto the Earth's surface as lava and cools quickly, forming extrusive igneous rocks like basalt.


Explain 2 ways Igneous Rocks Form?

Igneous rocks form when magma cools and solidifies either underground (intrusive rocks) or on the Earth's surface (extrusive rocks). Intrusive rocks cool slowly, allowing large crystals to form, while extrusive rocks cool quickly, resulting in tiny crystals or glassy textures.


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 condition lead of the formation of large crystals in an igneous?

Igneous rocks will develop large crystals is they cool slowly underground.


Some igneous rocks cool at the surface and some cool underground. What are the names of these two types?

Underground = intrusive/plutonic aboveground = extrusive/volcanic


Do intrusive rocks have large crystals because they cool quickly?

No. Intrusive igneous rocks have large crystals because they cool slowly.


What conditions lead to formation of large crystals in an igneous rock?

Igneous rocks will develop large crystals is they cool slowly underground.


Why do igneous rocks that cool from magma underground cool so slowly?

They are surrounded by hot rock and are insulated by the surrounding material. Rocks are poor conductors of heat.


Some extrusive igneous rocks such as obsidian are glassy because they are what?

They cool to quickly for crystals to form.