Woods Hole Oceanographic Institution
Woods Hole Oceanographic Institution: Trenches
Explains what ocean trenches are and why they are important. Includes links to videos, additional articles, and information about some deep-ocean submersibles.
Woods Hole Oceanographic Institution
Woods Hole Oceanographic Institute: Mid Ocean Ridges: Types of Ridges
A detailed, interactive look at the mid-oceanic ridge. Learn more about slow and fast spreading ridges and how the polarity of the ocean floor helps determine the speed of spreading.