Yes, a great deal of it.
continental crust
Water
Water 75%
water wind.
Oceanic crust is denser than continental crust, it floats lower in earths mantle.
The Earths crust is approximately 650 km deep.
almost no silica in ocean water but most of its the earths crust.
The sudden vibration in the plates inside the crust causes the earths crust to rise & fall.
Geothermal energy is from heated water within the earth's crust.
mantle
The earth's crust is not stress
it can be used for power, like geothermal