When viewed in profile, mid-ocean ridges have an appearance of a "speed-bump" - starting on either continent, the bathymetry goes from sea level to deep to shallow, and then back to deep as you cross the middle of the mid-ocean ridge. Deep ocean trenches, on the other hand, are narrow dropoffs that cut far down into the ocean floor. Does the Mid-Atlantic profile show a mid-ocean ridge or a deep ocean trench?
