List ways landmasses shifted since the flood.

Landmasses get disturbed and moved for a lot of reasons, mostly are results of human activities and natural calamities. Ground surfaces are changing when there's an earthquake, volcanic eruptions, heavy rains and floods. During flood, soils are moved and carried from one place to another.  Mud and sands are moved by waters in the rivers and ocean.

The  ancient egyptians  who  built the pyramids  may have been  able  to move massive stone blocks across the desert by wetting the sand in front of a contraption  built  to pull the heavy objects