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USGS CMG InfoBank: Continental Slope and Rise

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Comment: 05:04 - 06:11 (01:07)
Source: Annenberg/CPB Resources - Earth Revealed - 4. The Sea Floor
Keywords: "Tanya L. Atwater", "continental shelf", "continental slope", "continental rise"

Our transcription: If we started at the beach and went toward the deep ocean, we would see first, the "Continental Shelf", and then, usually, there's a quiet distinct break in slope, and it's suddenly steep.
That's really the geologic edge of the continent, so it's shallow at about 200 meters depth, though it varies from place to place.
Suddenly, its deep, and then it drops all the way to four or six kilometers depth to the deep ocean, so it's very tall scarf from the edge of the Continental Shelf to the deep ocean, that's called the "Continental Slope".
Then, when you get to the base of the slope, there's a huge long shallow slope where all the debris that's coming off the continent is deposited, and so it's a very gradual slope that's called the "Continental Rise".
If you were coming towards the continent, you'd slowly rise up it, and all the debris that's coming out of all the rivers and off of the slope by a lot of different processes, all end up in a big pile, slowly getting thinner and finer as you go away from the base of the slope.

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Page Last Modified: Thu Oct 31 04:25:29 PDT 2013  (chd)