The movement of crustPlates, each plate is moving in a different direction from what caused a movement on the surface world. Both on land and under the ocean sediment, there are 3 types of crust sheet.
The movement of tectonic plates, each plate is moving in a direction different from that which caused the motion on the ground. Both on the ground and under the ocean. There are 3 types of tectonic plate movement.
The motion of the earth sheets each sheet is moving in a different direction from the things that cause movement on the earth's surface. Both on the ground and under the ocean. The motion of the plates with 3 types.