<P> The continental crust consists of various layers , with a bulk composition that is intermediate to felsic . The average density of continental crust is about 2.7 g / cm , less dense than the ultramafic material that makes up the mantle , which has a density of around 3.3 g / cm . Continental crust is also less dense than oceanic crust , whose density is about 2.9 g / cm . At 25 to 70 km , continental crust is considerably thicker than oceanic crust , which has an average thickness of around 7 -- 10 km . About 40 % of Earth 's surface is currently occupied by continental crust . It makes up about 70 % of the volume of Earth 's crust . </P>
<P> The continental crust consists of various layers , with a bulk composition that is intermediate to felsic . The average density of continental crust is about 2.7 g / cm , less dense than the ultramafic material that makes up the mantle , which has a density of around 3.3 g / cm . Continental crust is also less dense than oceanic crust , whose density is about 2.9 g / cm . At 25 to 70 km , continental crust is considerably thicker than oceanic crust , which has an average thickness of around 7 -- 10 km . About 40 % of Earth 's surface is currently occupied by continental crust . It makes up about 70 % of the volume of Earth 's crust . </P>
which parts of the crust are thicker oceanic or continental
which parts of the crust are thicker oceanic or continental
continental
continental