the steeply sloping sea bottom from 200 to 2000 metres (or 100-300 m to 1400-3200 m) and 3-6°C. Average angle of slope is 4° with a maximum about 20° near the upper margin
Region of the outer edge of a continent between the generally shallow continental shelf and the deep-ocean floor, usually demarcated by the 200 m isobath.