as he comes to the surface. Notes Edit John Keller calls the abyss the deepest point on Earth... but in reality, this is untrue. The Marianas Trench is 5,000 meters deeper than the Laurentian Abyss. Granted, "Laurentian Abyss" sounds more sci-fi menacing than "Marianas Trench"... which sounds like a Pizza Hut gimmick.