Question

The layer which was earlier Known
as sial
​

Answer 1

Because the ocean floors are mainly sima, it is also sometimes called the 'oceanic crust'. The name 'sima' was taken from the first two letters of silica and of magnesia. Comparable is the name 'sial' which is the name for the upper layer of the Earth's continental crust.

Answer 2

Answer:

In geology, the term sial refers to the upper layer of earth's crust , namely rich in silicates and aluminium minerals..

Explanation:

It is kniwn as oceanic crust.....

Thanks.....