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"Get a grip, man. Max depression of sea level was about 330 feet. Water still would have flowed through the Cayman Tranch and the Strait of Florida."

You get a grip! I said it was a theory. Where's your Ice Age sea level data?

Also, if the structures off the coast of Florida turn out to be man made (I don't think they are, btw), I'd like to hear your explanation of how they got 1/2 mile underwater. Finding an answer to that question is how I got into this and I've not heard any better ideas than mine. You're just critizing, offer up some original ideas.

Well, it would take me a while to round these up. I work in a profession that requires me to keep up with advances in Quaternary geomorphology and geology, but I don't keep references at home.

As for structures underwater, we should not rush to judgement that they are manmade. Plenty of natural petromorphs appear anthropogenic, but are not (for example, basalt crystals that are perfectly hexagonal in cross-section). These may be no more than granitic dikes or sills that cooled slowly, and produced macrocrystalline structures.

By the way, I've been following these issues since I read an article about a "causeway" underwater around Bimini in Argosy magazine in 1969. I'm not new to this...but I haven't seen any convincing evidence that these structures are anthropogenic.