Continents float because they tend to be a collection of ~1000km diameter subcontinental basalt/granite plates sitting on top of plumes of hot but high-pressure molten rock. So in other words, not your average raft.
Continents float because they tend to be a collection of ~1000km diameter subcontinental basalt/granite plates sitting on top of plumes of hot but high-pressure molten rock. So in other words, not your average raft.