Question

The expansion of SIMA is ____________

(a) Silicon and Manganese

(b) Silicon and Magnesium

(c) Strontium and Manganese

(d) Strontium and Magnesium

I got this question by my school principal while I was bunking the class.

The doubt is from The Crust in section Internal Structure of the Earth of Engineering Geology

Answer 1

The correct option is (b) Silicon and Magnesium

To explain: Silicon and Magnesium. The C-layer under the continental crust is rich in Silicon and Magnesium and hence the layer is also sometimes called SIMA.