Question

Q.6. Name the rocks which forms the sial and sima.
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Answer 1

Answer:

Explanation:

In geology, the term 'sial' refers to the composition of the upper layer of the Earth's crust, The continents are composed mainly of lighter Rock material formed from silicon The name 'sial' was taken from the first two letters of silica and of alumina. The sial is often contrasted to the 'sima,' the next lower layer in the Earth, In geology, sima is an antiquated blended term for the lower layer of the 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 the When the denser sima comes to the surface it forms mafic rocks, or rocks with mafic minerals.