200 km
No, it isn't.
true
Continental shelf
Continental shelf
shelf
The average width of the continental shelf is about 80 km or 50 miles. The Shelf descends steeply down to the continental rise before reaching the ocean floor.
Continental Slopes.
Land. Continental shelf.
the continental shelf-edge or shelf-break
the depth zone about 100 metres off the bottom at all depths below the edge of the continental shelf.
The continental slope is the area of the ocean floor in which gently drops and is connected to the oceanic crust and continental shelf. This slope is caused by waves within the ocean.
The depth of the continental shelf varies. It is generally limited to shallow water, shallower then 490ft. Vertical relief is minimal at less then 20m. The slope of the shelf is also quite low, 0.5degrees