I had the same thought, and I'm amazed that someone else had it also. I shouldn't be, because FR has always been a meeting place for thinkers.
To back up your statement, the rate of silting and sand deposition over the last 5000 or so years is probably enormous, especially in areas of the ocean close to shore, as this one is.
That said, I wish this team luck, because I suspect that the theory is correct.
Nah, this is fun, easy stuff. I actually have a theory that the Gulf Of Mexico was blocked off from the worlds oceans during the Ice Age
Look at this map here, it shows the whole world with the ocean levels lowered by about 300 feet. Some things to notice, no Persian Gulf, land locked Red Sea, the Mediterranean is in three sections, Japan and Korea is attached, etc.
Now, reduce that on down by another 200 feet (many believe the oceans were lowered by 500 feet) and imagine the result.
Going Into The Water: A Survey Of Impact Events And The Coastal Peoples Of South-East North America.