Was Atlantis Off the Coast of Ireland?

Researchers have discovered a three nautical mile strip off the coast of Ireland that the BBC describes as a "Prehistoric land under the sea." Here's a quote:

Deep below the sea, off the north coast of Northern Ireland, a dramatic geological mystery has been discovered.

Huge cliffs, vast basins and plateaus, a lake and even rivers have been found. But so far no-one is certain what caused them to end up like this deep under the sea.

The discovery was made when the seabed was being surveyed to update old Admiralty charts, drawn up in the mid-1800s.

Could this be the infamous lost city of Atlantis? Or, is it just a preview of what the west coast of California will look like after a major earthquake?