continental crust

• The continental crust is made of different types of igneous, sedimentary and metamorphic rock. 
• It can be much thicker than oceanic crust, o. average 35km-90km. 
• Continental crust is slightly less dense - 2.7g/cm3. 
• The process of orogeny includes continental crusts being pushed up and folded at convergent plate boundaries. The thickest parts of continental crusts are found at mountain ranges. 
• Cratons are the oldest and most stable part of continental lithospheres. Found deep in the interior of most continents. They are aseismic which means they don’t have earthquakes.
• Continental crust is almost always much older than oceanic crust. It is rarely destroyed in subduction.