Yes, a great deal of it.
continental crust
water
stream
Water
Water 75%
the majority of it is found in water
water wind.
I believe this would be the oceanic crust
The earths crust is a part of the outermost layer.
Silicon is a mixture of the minerals of the earths crust. so.... silicon isn't something from the earths crust. -thanks for your question.
Geothermal Energy is energy that is drawn from heated water within the Earth's crust.
Oceanic crust is denser than continental crust, it floats lower in earths mantle.