Sounds so serene and decorous. Lift the crust. That's the model they taught, and it seems to be popular again. Some large body came by earth way back when and pulled the material out into space where it recollected forming the moon. It would probably work for Mars, too, even though Mars seems to have totally lost most of its material from one side of the planet anyway, not even a good-sized moon left. If Mars had a moon formed that way, it seems to be long gone, who knows where; it ought to be in a similar orbit as Mars, but there is nothing there. Perhaps Mars was farther out when that happened and has migrated inward toward the sun leaving the debris in the asteroid belt. Perhaps we'll track it down when we have done enough geological prospecting in the asteroid belt and have some good data.
Since the iron core model of the earth doesn't work for me (because of the jaggedly wandering poles), I have my thoughts on the movement of continents and the Pacific Basin also. The nature of our magnetic field with it's flips, etc., resembles more a nuclear core than just an iron core. If only 1 percent of the magnetic strength is able to get through the mantle of the earth, then there may be some other physics going on. Perhaps a Meissner effect that could have spread the continents apart.
(Just a word to the scientifically wise because this has implications that I don't want to get into publically...and that's all I have to say about that...:^)...)