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What is the calcite compensation depth or CCD?

The carbonate compensation depth, or CCD, is defined as the water depth at which the rate of supply of calcium carbonate from the surface is equal to the rate of dissolution. As long as the ocean floor lies above the CCD, carbonate particles will accumulate in bottom sediments, but below, there is no net accumulation.

Why is calcareous ooze sometimes found beneath the CCD?

Why does calcareous material dissolve below the CCD? Below the CCD, weak acid is formed, which dissolves calcareous material.

What is the CCD and what effect does it have on the accumulation of calcareous ooze?

Carbonate Compensation Depth, abbreviated as CCD, refers to the specific depth of the ocean at which calcium carbonate minerals dissolve in the water quicker than they can accumulate. This creates a calcareous ooze that can, under pressure from the overlying water, form limestone or chalk.

What is the average depth of the CCD calcite compensation depth )?

4500 m

What can change the compensation depth?

Once sunlight penetrates the water, the compensation depth varies with ocean conditions. For example, with an increase in production there is an increase in phytoplankton populations, as well as the numbers of zooplankton that eat the phytoplankton.

What happens below the carbonate compensation depth?

If the sea bed is above the CCD, bottom sediments can consist of calcareous sediments called calcareous ooze, which is essentially a type of limestone or chalk. If the exposed sea bed is below the CCD tiny shells of CaCO3 will dissolve before reaching this level, preventing deposition of carbonate sediment.

What occurs below the calcium carbonate compensation depth quizlet?

the depth at which the rate of accumulation of calcareous sediments equals the rate of dissolution of those sediments. Below this depth, sediment contains little or no calcium carbonate.

What is the depth at which calcium begins to dissolve called?

The lysocline is the depth in the ocean dependent upon the calcite compensation depth (CCD), usually around 3.5 km, below which the rate of dissolution of calcite increases dramatically because of a pressure effect.

Where do calcareous oozes exist on the seafloor quizlet?

Where do calcareous oozes exist on the seafloor? underneath areas where calcareous organisms live, above the CCD.

What is the average CCD depth below sea level quizlet?

The Calcite Compensation Depth (CCD) is the depth in the ocean where carbonate dissolution equals carbonate supply. The CCD, on average, is 4500 meters below sea level.

Why doesn’t all the siliceous ooze dissolve before it hits the ocean floor?

The surface waters must be nutrient-rich. Why doesn’t siliceous ooze dissolve after it accumulates on the seafloor? Once deposited on the seafloor, siliceous organisms bury each other.

Which correctly orders sediment sizes from smallest to largest?

Sediments are classified according to their size. In order to define them from the smallest size to the largest size: clay, silt, sand, pebble, cobble, and boulder.

Why is this drilling process called rotary drilling?

Why is this drilling process called rotary drilling? Because the drill bit turns around in a circle.

What area of the ocean floor usually has the thickest sediment deposits?

On the seafloor, sediments are thinnest near spreading centers (young seafloor) and thicker away from the ridge, where the seafloor is older and has more time to accumulate. Sediments are also much thickest near continents.

Which type of sediment is most abundant?

Terrigenous sediments

Where are the thinnest layers of marine sediment found?

The thinnest layers of marine sediments are generally found in deep-ocean basins near mid-ocean ridges. However, as the ocean crusts ages and moves away from the spreading centers, time allows sediments to gradually accumulate on the seafloor.

Which type of sediment is more likely to be found at the bottom of the ocean?

Because of differences in chemistry, seafloor sediments made of calcium carbonate most commonly form in shallower and warmer water. Seafloor sediments made of silica more often occur in deeper or colder water.

What material is at the bottom of the ocean?

In the deepest parts of the ocean, you’ll find layers of Earth’s crust make up the ocean floor. These deepest layers are made up of rock and minerals. Unlike the soft sands along the shoreline, these deep layers of thick rock and minerals do a fine job of holding the water in the world’s oceans.

What happens if you bring a deep sea fish to the surface?

Pressure is decreased as the fish is brought to the surface allowing these gasses to expand. The dissolved gasses in the tissues will come out of solution and form small bubbles. These bubbles can be seen in the eyes and scales of many fish. They are small and the biggest thing you are likely to notice is bulging eyes.