what is the main material type that Continental plates are made up of?

Question

I mean like ALFRED WEGNERS CONTINENTAL DRIFT THEORY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I NEED TO ANSWER THIS QUESTION!!!!!!!!!!!!!!!!!! THE FIRST PERSON TO ANSWER WILL BE BEST ANSWERED

AND THE CONTINETAL PLATES TOO!!!!!!!!!!!!!!!!!!!!!1

Answer 1

Silica. The Earth's crust is made almost entirely from mineral oxides, nearly 60% of which is silica (Silicon Dioxide, the same stuff that sand, quartz, and glass are made of). See this Wikipedia link for a more complete breakdown:

http://en.wikipedia.org/wiki/Crust_%28geology%29#Composition_of_the_crust

Answer 2

Rock