Question

Rocks in the lithosphere have a fixed chemical composition

Answer 1

Explanation:

Under the ocean basins, the crust and mantle rocks of the lithosphere have more or less the same chemical composition. They are made up of minerals enriched in iron and magnesium and deficient in silica, the combination of silicon and oxygen.

Answer 2

→Answer & Explanation :

Under the ocean basins, the crust and mantle rocks of the lithosphere have more or less the same chemical composition.

→Additional Information :

They are made up of minerals enriched in iron and magnesium and deficient in silica, the combination of silicon and oxygen.