Chemical shells Physical layers

Lithosphere Ocean ridge

Lithosphere Asthenosphere Mesosphere

Lithosphere Ocean ridge

Lithosphere Asthenosphere Mesosphere

6 Infobase Publishing

6 Infobase Publishing through kimberlites have recently released diamonds, showing that there is still carbon at depth. Carbon dioxide is presently being degassed from the interior of the Earth at high rates, showing that fractionation is an ongoing process. The composition of the Earth and its different layers has been calculated based on density measurements, gravity, deep samples erupted from volcanoes, and models based on the composition of meteorites. The crust has been calculated by geochemists to have a composition that is about:

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