These continents are still on the move today. Exactly what drives plate tectonics is not known. One theory is that convection within the Earth's mantle pushes the plates, in much the same way that ...

Where convection currents push plates together, destructive plate boundaries (margins) are formed. Constructive plate margins close constructive plate marginAn area where two tectonic plates are ...

Plate tectonics describes the movement and interaction of tectonic plates on Earth's surface. This movement is driven by the very slow creeping motion of Earth's mantle, called convection ...

Since the late 1960s, when plate tectonics and slow, creeping convection of the rocky mantle became accepted, geoscientists have been debating whether convection extends from the surface to the ...