The continental shelf is the extended perimeter of each
continent and associated
coastal plain, which is covered during
interglacial periods such as the current epoch by relatively shallow
seas (known as shelf seas) and
gulfs. The shelf usually ends at a point of increasing slope (called the shelf break). The sea floor below the break is the continental slope. Below the slope is the continental rise, which finally merges into the deep ocean floor, the
abyssal plain. As the continental shelf and the slope are part of the continental margin, both are covered in this article.
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