they have discovered that about 22000 years ago or so, the ocean levels were 120 meters lower than they are now. that's about 400 feet. its been that low before. that's a lot of pressure off the sea floor.

also if you check out other threads here, they have discovered that the arctic was almost tropical several million years ago. it occurred rather suddenly apparently. that could have been caused by a major release in methane ice. the thing is, the temperature was a lot higher before that release than it is now.

the more man learns, the more he realises, he really does not know anything.