The transition from the gently
sloping continental shelf to the deep
ocean basin is called the continental
slope. Here, the ocean depth
increases rapidly, reaching several
thousand meters within a few
kilometers. At the base of the
continental slope is the boundary
between the continental crust and
the oceanic crust. The slope is
formed by sediments washing over
the edge of the slope or scraping
off of a subducting plate. Generally,
continental slopes located at active
margins, for example the Chile
Trench, are steeper than those
located at passive margins like the
those in the Drake Passage.
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