If earth is 70% water, and we see land being created by volcanoes... then would it be safe to make an ASSUMPTION that Earth may have once resembled something such as the moon EDIT: Europa. Covered fully in liquid water until comet impacts and volcanoes eventually gave way to land mass? Now i must be able to explain Pangea... how did all the land pop up in the same place at once? perhaps the Earth at that time, was only spewing lava in one location.. it's plate tectonics were just getting underway.. is it not safe to say? Pangea slowly ripped apart forming new faults, ring of fire etc. I have not thought this through to much, nor have i done any studies, it;s just an idea at the moment, but 'id like some input if you could thanks, positive or negative, but please explain your position, so i can gain some data and more ideas as well... Thanks David.