Question

what is sial and sima ​

Answer 1

Answer:

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).

Answer 2

Explanation:

The inner layer again has three layers, i.e, SIAL which is made of silica and aluminum. The average thickness is 8 to 100 km. The layer next to it is SIMA makeup of silica and magnesium and an average thickness of this layer is 100 to 2900 km.