Underneath the Earth's crust is molten rock. The continents are basically floating on top of the rock and therefore move and shift. This is what causes volcanoes and earthquakes. Pangaea was broken...
Plate Tectonics. Plate Tectonics are the sub-layers that lie underneath the Earth's surface. They can rub against together, smash together, or pull away from each other. This is what caused Pangaea...