Question

what is meant by sima and sial​

Answer 1

Answer:

sima is an antiquated blended term for the lower layer of earth's crust

sial is the name for the upper layer of earth's crust (continental crust)

Explanation:

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Answer 2

Answer:

In geology, sima 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).