Is the Earth's outer core thick or thin? - Quora
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Earth is over 1200 km thick and has four layers. – Crust - outer solid rock layer (granite on land, basalt in oceans) – Mantle – thickest layer, mostly. - ppt download
Is the Earth's outer core thick or thin? - Quora
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Is the Earth's outer core thick or thin? - Quora
Oceanic ridge, Description, Examples, & Facts
The Crust: The Thinnest Layer of the Earth
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