This theory is similar to the first theory, except the geography covers most of North and Central America and it also includes areas of the Carribean that have sunk into the ocean that appear to be cities and/or civilizations.
In all honesty, I feel sorry for Mormons.
This shows how far people will go to hold onto their beliefs despite overwhelming evidence they aren't true.
Sunken cities? And of course all the anacronisms (horses, sheep, forged metal, barley, wheat, etc...) found in the BOM also sunk. See, they existed, we've just been looking in the wrong place.
When you have to resort to a theory that makes the City of Atlantis legend look rational, you've redefined desperate.