What causes a continental slope?

What causes a continental slope?

Over geologic time, the continental slopes are temporary depositional sites for sediments. During lowstands of sea level, rivers may dump their sedimentary burden directly on them. Sediments build up until the mass becomes unstable and sloughs off to the lower slope and the continental rise.

What organisms live in the continental slope?

Different Slope Communities Dover sole, sablefish, and rockfish (fig. 4) have this type of life history; however, most species living deeper, such as rattails, deep-sea soles, and slickheads, have young that live in the same depths as adults. Relatively few species occur at all or most depths on the Continental Slope.

What happens on the continental slopes?

The continental slope (often referred to simply as “the slope”) is commonly dissected by submarine canyons; faulting, rifting and slumping of large blocks of sediment can form steep escarpments, relatively flat terraces and (under certain conditions) basins perched on the slope.

What is commonly associated with a continental shelf?

The sediment accumulated on continental shelves consists of channel and floodplain deposits from a time when sea level was lower. An active continental margin forms adjacent a spreading ridge as a new ocean is being created.

Where would you find continental slope?

A continental slope is the slope between the outer edge of the continental shelf and the deep ocean floor. The continental slope is cut by submarine canyons in many locations. The continental slope marks the seaward edge of the continental shelf.

Where are continental slopes found?

Continental slopes are regions of steeply sloping seafloor that lie between continental shelves and the deep ocean basins (Figure 2).

What animals live in the abyssal plain?

Animals that commonly occur in abyssal sediments include molluscs, worms (nematodes, sipunculids, polychaetes, hemichordates and vestimentiferans) and echinoderms (holothuroids, asteroids, ophiuroids, echinoids, and crinoids).

What creatures live in the abyssal zone?

What animals live in the abyssal zone? The life that is found in the Abyssal Zone includes chemosynthetic bacteria, tubeworms, and small fish that are dark in color or transparent. It also includes sharks and invertebrates such as squid, shrimp, sea spiders, sea stars, and other crustaceans.

How do tectonic plates cause continental shelves?

At active margins, the movement of Earth’s plates causes earthquakes and volcanic activity. This activity shapes continental shelves around much of the Pacific Ocean, where shelves are often very narrow, so that sediment may get dumped into deep ocean trenches.

How does continental shelf affect waves?

Continental shelves have generally been interpreted as drowned coastal plains associated with the allogenic effect of sea-level variation. This proximate proto-shelf can then grow to wave base, after which wave-supported turbidity currents can extend it seaward.

Which of the following best describe continental slope?

The correct answer is (a) The geological edge of the continent and is where the continent drops off to the deep ocean floor. Where the continental shelf ends, the ocean floor slopes downward and the depth of the ocean increases. The continental slope is the point where the continent drops off to the ocean floor.

What is a continental slope National Geographic?

A continental shelf extends from the coastline of a continent to a drop-off point called the shelf break. From the break, the shelf descends toward the deep ocean floor in what is called the continental slope. Most continental shelves are broad, gently sloping plains covered by relatively shallow water.

Why are there very few animals on the continental slope?

❒ As a result of abiotic factors like cold water, pressure, and low light, very few lifeforms are found in this part of the marine biome. Unlike the continental shelf, the continental slope is devoid of vegetation and thus, doesn’t attract many species.

What are some interesting facts about the continental slope?

Interesting Facts about the Continental Slope. The continental shelf starts at the shoreline and extends all the way to the shelf break. The continental rise―also characterized by a gradient, albeit gentle―lies partly on the continental crust and partly on the oceanic crust. It is, in fact, considered the transition zone between the two.

What happens to sediments on a continental slope?

Continental slope. Sediments build up until the mass becomes unstable and sloughs off to the lower slope and the continental rise. During highstands of sea level, these processes slow down as the coastline retreats landward across the continental shelf, and more of the sediments delivered to the coast are trapped in estuaries and lagoons.

What is the life history of the continental slope fish?

Fishes living at different depths on the Continental Slope have different life histories. Species living near the top of the slope produce pelagic (open-ocean) young that spend the first few months to years of life swimming in the upper water column and then settle out in relatively shallow water and migrate downslope as they grow and mature.