[macglencoe]

One of the problems that the geologists have is that when you have a huge earthquake, the ocean floor becomes mountains and the mountains become the ocean floor. Why do you think that there are non volcanic mountains along the ocean floor? You can find seashells on top of mountains.

[Axenolith]

Hmmm... Being a geologist, I haven't run into that as a "problem" yet. They don't get there in one earthquake, or hundreds, for that matter. They get there over a few millions of years in an Orogeny.