Huge plates that are underground that move.
The movement of the continents moving.
All the continents were one togheter to make a super continent called Pangea.
A very unstable plate like region 80-200km underground
A very rock hard crust of most rocky planets.
Mountain like range underwater.
A plain like land that is caused by two mountains that were spliting.
To plates colliding on to eachother with one going over one another.