What is meant by sima and sial?
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In geology, sima (/ˈsaɪmə/) is an antiquated blended term for the lower layer of Earth's crust. This layer is made of rocks rich in magnesium silicate minerals. ... Comparable is the name 'sial' which is the name for the upper layer of Earth's crust (continental crust).
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❤sima means major constituent elements of the mantle are magnesium and silicon hence it is called sima and sial means major constituent elements of the lithosphere are silica and magnesium hence it is termed as sial.❤
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