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How does crust form?

Updated: 8/9/2023
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7y ago

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There is new rocks that build up they first start as lava and they build up and make new crust

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Lewis Streich

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2y ago
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14y ago

I think your question is how did the crust originate. Scientists believe our planet originated about 4.5 billion years ago, and was extremely hot. The outer layer began to cool first, but extremely slowly. The outer layer, is called the crust, and ranges from 10 to 70 km thick. (see link) The crust is formed by the cooling of the earth, which is still going on. You should think of the crust as the thin, outer layer, but its a bit more complicated. However, scientists in the last 50 years came to the conclusion that this outer layer was composed of large sections or plates and were capable of moving, albeit extremely slowly. This means that the locations of the continents have shifted considerably in the last 4 billion years. I've included a few links where you can learn more about the crust, mantle and core. You may also want to read about continental drift and plate theory.

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9y ago

When the Earth was still in molten form, and still cooling, lighter elements and compounds such as silicates (quartz, feldspar) floated toward the surface, while heavier elements (iron, nickel, radioactive elements) sank toward the core. Igneous rocks formed from magma still bring metals and other heavy elements to the surface as the crustal plates shift and subduct.

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14y ago

The crust formed from molten material as the planet's surface cooled sufficiently to allow minerals to crystallize. The first crustal rocks were therefore igneous in nature.

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11y ago

the earth was a big hot ball made up of many rocks and gases. After millions of years the outer portion of the earth coooled down. We live on this outer layer of the earth called the Crust.

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11y ago

I think it formed during the Cambrian Period.

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11y ago

Ask the teacher :)

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Q: How does crust form?
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Where do ophiolites form?

They form in the ocean crust.


Is there a geyser beneath the crust?

No. Geysers are not beaneath the crust. They form within the crust, relatively vclose to the surface.


How does a deep-ocean trench form?

They form when the oceanic crust goes under the Continental crust. The oceanic crust then forms the trenches through a process called subduction.


What are the changes in the Earth's crust?

the crust's plates shift until they have reached their form


What form does the crust do?

plate tectonics.


How does magnetite form?

by earth's crust


The top part of the mantle and the crust above it form the hydrosphere or lithosphere?

The top part of the mantle and the crust above it form into lithosphere.


What is likely to form where oceanic crust is subducted under continental crust?

because oshieotic crust is under Mantle is thicker


What can form deep insides Earth's crust by crystallisation of melted meterials?

what can form deep insides earths crust by crystallisation of melted materials


How the thin outer crust is floating on the thick liquid mantle causing the crust to move and form a divergent plate boundary?

how the thin outer crust is floating on the thick liquid mantle, causing the crust to move and form a divergent plate boundary


What are the changes in Earth's crust during earthquake?

the crust's plates shift until they have reached their form


Are all metals in the earths crust?

Yes all metals are in the earths crust in ore form.