Question

The crust comprises of two distinct layers of sial and ​

Answer 1

Answer:

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The upper layer is mainly composed of Silica and Aluminium(SiAl) and is upto the depth of 11 km from the surface. The lower crust is composed of Silica and Magnesium (SiMa) and is upto depth of 11 to 33 km.

Answer 2

Answer:

Answer. Answer: 1) The upper layer is mainly composed of Silica and Aluminium(SiAl) and is upto the depth of 11 km from the surface. The lower crust is composed of Silica and Magnesium (SiMa) and is upto depth of 11 to 33 km.