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Properties and Composition of the Earth's Crust. The continental crust is between 10 km and 70 km thick, depending on the location. As you descend through the crust, the temperature increases from surface temperature to between 300 degrees Celsius and 500 degrees Celsius.ontinental crust is between 10 km and 70 km thick, reaches temperatures as high as 500 degrees Celsius, pressures as high as 91,000 atmospheres, and is made up of rock that is mostly felsic and granitic. It is thanks to the formation of continental crust that humans and all land-evolved species exist.
The continental crust is made mostly of rocks with a composition similar to granite (a light-colored rock you would expect to find in the Sierra Nevada), whereas the oceanic crust is made mostly of rocks with a composition of basalt (a dark-colored rock, like the rocks that make up the Hawaiian volcanoes).ecause continental crust is less dense than oceanic crust it floats higher on the mantle, just like a piece of Styrofoam floats higher on water than a piece of wood does. The mantle, oceanic crust and continental crust have different densities because they are made of different kinds of rock with different densities.