antarctica lies at the base of the continental slope.
antarctica lies at the base of the continental slope.
lies at the base of the continental slope?
antarctica
the continental shelf is the portion of the continental margin that transitions from the shore out towards to ocean. they are believed to make up 7 percent of the sea floor. the width of continental shelves worldwide varies from a 30 meters to 1500 kilometers. it is generally flat, and ends at the shelf break, where there is a drastic increase in slope angle. the mean slope of continental shelves worldwide is 0° 07’ degrees, and typically steeper closer to the coastline than it is near the shelf break. at the shelf break begins the continental slope, which can be one to five kilometers above the deep-ocean floor. the continental slope often exhibits features called submarine canyons. submarine canyons often cut into the continental shelves deeply, with near vertical slopes, and continue to cut the morphology to the abyssal plain. the valleys are often v-shaped, and can sometime enlarge onto the continental shelf. at the base of the continental slope, there is a sudden decrease in slope, and the sea floor begins to level out towards the abyssal plain. this portion of the seafloor is called the continental rise, and marks the end of the continental margin.
continental margin
the hudson canyon proper is located about east of the mouth of the hudson river off the new jersey coast. its walls rise three-quarters of a mile from the canyon floor, making it comparable to the grand canyon, whose cliffs are over a mile deep and long. it is the largest known ocean canyon off the east coast of the united states, and one of the largest submarine canyons in the world. the canyon is located near the 100 meter isobath on the continental shelf and is deep at the base of the continental slope. over an distance, the average slope of the canyon floor is 1.5°. at this point the canyon is as much as wide (from east rim to west rim) and as much as deep from canyon rim to canyon floor across the continental slope. the floor of the canyon is less than wide across the upper part of the slope and broadens to about at the base of the slope.
hudson canyon