The Continental Shelf and Slope
Ocean depth on the continental shelf varies mostly between 100 m and 400 m. The shelf can be seen as a colossal dump yard directly off the coast, comprised of sediments transported in from the shore. Glaciers are to be held accountable for most of this activity. During the ice ages massive amounts of sediment were dumped on the shelf and outside the edge of continental shelf. In this way, parts of continental shelf edge moved up to 200 miles out from the shore. The most productive fishing areas on the Norwegian continental shelf, are found near these geological land forms. The fjords often continue beyond the continental shelf to form marine valleys which were dug out by fast moving ice during the ice age, creating banks teeming with fish.
Another good fishing area is shelf break, which is continental shelf's the outer boundary. The nutrients that follow the ocean currents up from the ocean depths attracts large amounts of fish, sea birds and whales. The shelf break, is the boundary between the continental shelf and continental slope. On the slope, we find many traces of submarine landslide activity, among other things, a ocean canyon and huge avalanche fans made up of sediment run-off.