Oh, and the force at which the bow hit is visible in the debris field map. That's why it's so dark around her. That's from both the lower sediment being uncovered from the the current that followed her down (what James Cameron called a hypoburst, but it's basically just the inertia of the current and suction of the ship and probably not as violent as he argued). The sheer size of that dark field around her shows how hard she hit. But you'll notice that the stern doesn't have that big dark field around her. It's only a little darker. That suggests that she didn't hit as hard as the bow did because she twirled her way down instead of shooting down or "leafing" as is more likely (floating forward, then back, then forward, which is what the models of the bow did when they tested it in a tank).