Sial is composed of __________ and ____________.

1.	Sial is composed of __________ and ____________.
Answer» Answer: the assemblage of rocks, rich in SILICA and ALUMINA, that comprise the CONTINENTAL PORTIONS of the upper layer of the earth's crust.

Sial is composed of and __.

Answer»

Answer:

the assemblage of rocks, rich in SILICA and ALUMINA, that comprise the CONTINENTAL PORTIONS of the upper layer of the earth's crust.