My theory is this. The continent of Pangeia sat upon the Mid Atlantic Ridge upon caves filled with water. An earthquake broke the structures holding the continent causing it to fall upon the mid Atlantic ridge. The pressure of the land upon the water in the caves was phenomenal. The water burst forth into the sky causing the Great Flood of Noah. The Bible described this saying "The fountains of the great deep burst forth." The Mid Atlantic Ridge is actively volcanic in nature, which I suspect created the ridge.
At that time the continents began to move, not slowly but very fast away from each other. They moved until they hit something that stopped them. This is what caused the Western mountains in both north and south America. This is what created the Atlantic Ocean.
Please look closely at the horizontal lines that cross the mid Atlantic ridge and run outward away from the ridge on both sides. These exist from the top to the bottom of the ridge. I do not believe this is by chance, I believe these are skid marks where the continents slid away from each other after cracking upon that ridge and breaking apart.