Which layer of the earth is made of silica and aluminum?
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the rocky surface of the is called crust and mainly made up of oxygen,silicon,aluminium,iron , calcium,sodium,potassium and magnesium
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Answer: upper layer of earth's crust.
Explanation:
In geology, the term 'sial' refers to the composition of the upper layer of the Earth's crust, namely rocks rich in silicates and aluminium minerals. It is sometimes equated with the continental crust because it is absent in the wide oceanic basins, but "sial" is a geochemical term rather than a plate tectonic term.As these elements are less dense than the majority of the earth's elements, they tend to be concentrated in the upper layer of the crust.
The uppermost layer of the crust is called sial consisting of silicate and Aluminium (Si =silicate, Al= aluminium). On an average, the thickness of sial is till 25 km from the surface.
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