Download Ocean Floor Soundwaves.usgs.gov The continental shelf is that part

Ocean Floor
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The continental shelf is that part of the continent that extends from the shoreline out to the continental slope.
Continental shelves are very flat and their widths vary.
The continental slope begins at the shelf edge, where water depth begins to increase rapidly.
The continental rise descends gradually from the continental slope to the ocean floor. It is considered part of
the ocean basin rather than part of the continent.
The abyssal plain is a large flat area on the ocean floor.
A seamount is a cone-shaped undersea mountain of volcanic origin that rises high above the ocean floor. If the
surface breaks through the surface of the ocean, it is a volcanic island.
A mid-ocean ridge is a long chain of mountains with a central rift valley that is located on the ocean floor.
Deep-sea trenches are long, narrow, steep-sided troughs that run parallel to continental margins.
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