Space Forum / Space Science / April 2005

I've just finished reading "the big splat" by Dana Macenzie. In it she says,
that Theia's impact site is impossible to determine given that the Earth
would have contained a magma ocean straight afterwards. Ok, fair enough, but
I think it was the Rev Usher who first suggested that the the Moon was
thrown out of the Pacifitc Ocean. Well, why could the site of Theia's impact
have been the Pacific? It would explain the absence of continents there
quite neatly by removing much of the lighter material that would elsewhere
form continents. Also the East Pacific ridge could be a relic of the fierce
convection that would have existed. Yes I know that the other oceans have
constructive marging too, but only the Pacific's is ancient. The other
oceans open and close periodically.
Alan