[mbreese]

I know nothing about this specifically. To me, it makes sense if you think about just how big these fields are and how slow of a process it is. Changes that take place slowly over a large area are more likely to cause shifts that seem relatively flat at the scale of a house. Another way to say it: at the geologic scale, a tile mosaic may as well be a point on a plane. Unless there is a fault line at that exact position, I can see how the area would move up and down relatively uniformly.

What I’d like to know is how long of a process was it really to lose a city into the bay. It would have happened while people were around, so is there some kind of historical record?