1. Like a cracked china cup, the continental crust is still fragile where it has been damaged in the past. 2. The Supercontinent Cycle alone has left the continental crust riddled with the scars of former rifts and mergers. 3. Continental lithosphere stands higher than oceanic lithosphere because continental crust is both of greater thickness and lower density than oceanic crust. 4. Like the oceanic crust, continental crust has a layered structure, but one which is much more complex and less clearly defined. 5. The earlier notion that the lower continental crust is largely basaltic in composition has received little support from more recent studies. |