Our interest is in discovering whether thrusters might be used to shift some or all of the plates around the mantle. Or, whether reorientation of the crust would require that we shift the crust and upper mantle together.

To gain an understanding of how the earth's crust is broken up into tectonic plates that move and float upon the mantle, click here:

http://physics.hallym.ac.kr/education/stellar/solar/earthint.htm