1. The ocean floor has many features.
What’s Down There?
The ocean floor has many features.

2. Inventions to Explore the Ocean Floor
Sonar
Scuba
Submersibles
Satellite
RUM
Deep Flight Aviator

3. Divisions of the Ocean Floor

4. Shallow Water Features
Shoreline: boundary where the land and ocean meet.
Continental margin: where the underwater edge of a continent meets the ocean.
Continental shelf: flat part of the continental margin covered with ocean water. Best fishing; large deposits of oil.

5. Shallow Water cont..
Continental slope: edge of the continental margin where the ocean floor plunges steeply. Marks the boundary between the oceanic crust and continental crust.
Continental rise: separates the continental shelf from the ocean floor.

6. Features on the Ocean Floor

7. Open Ocean Features
Abyssal plain: large, flat areas on the ocean floor. Larger in the Atlantic and Indian Oceans.
Seamount: underwater volcanic mountains with steep sides and a narrow summit.
Guyot: flat-topped seamount.

8. Open Ocean Cont…
Mid Ocean Ridge: mountain range located under the ocean. Formed where magma flows to the surface.
Rift Valley: mark the center of the mid ocean ridge-where new crust forms.
Trench: long, narrow crevices along the edge of the ocean floor. Deepest parts of the ocean.

9. All Together Now