Question

it refers to the composition of the upper layer of the earth crust Rock which which are rich in Iron and Aluminium mineral​

Answer 1

Explanation:

Clarke calculated that a little more than 47% of the Earth's crust consists of oxygen. It occurs principally in combination as oxides, of which the chief are silicon, aluminum, iron, calcium, magnesium, potassium and sodium oxides.

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Crust (geology) - ScienceDaily

Answer 2

Answer:

Clarke calculated that a little more than 47% of the Earth's crust consists of oxygen. It occurs principally in combination as oxides, of which the chief are silicon, aluminum, iron, calcium, magnesium, potassium and sodium oxides.♥️♥️♥️