Ancient civilization under Persian Gulf?

Eight thousand years ago, the water level in the Persian Gulf rose dramatically, an effect of melting glaciers at the end of the Ice Age. This may be the flood described in the Bible. Recent discoveries of ancient settlements on the current shoreline are surprisingly advanced and permanent. Hence the theory that evidence for an older, widespread civilization is beneath the waters. Jeffrey Rose of the University of Birmingham has published the idea and says he knows what the next step must be: finding an underwater site.