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Download Ocean floor - deb-or-ah
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The most part of the ocean floor is dark, and boring. Just off the continental shelf, the ocean floor is known as the abyssal plain. The depth of the abyssal plain is between 2200 and 5500 meters. It cover roughly 40% of the ocean floor. Less than one tenth of 1% of the abyssal plain has been explored by man. Creatures near the ocean floor receive their nutrients from: Hydrothermal vents, Release minerals rich in sulfides. Sulfides can be produced by chemotrophic bacteria acting as an essential part in small ecosystems. Cold seeps, a Methane-filled brine leaks from cracks. This brine also provides energy for bacteria. Whale Falls, carcasses of dead whales fall to the ocean floor. Estimated to be one every 25 Km. It may take up to a decade for a carcass to be fully consumed as scavenger type fish as very rare this deep. Organisms that receive their nutrients from the oxidation of electron donating molecules in their environments. Oceanic trenches are long, but narrow topographic depressions in the ocean floor. They are the deepest points of the ocean’s floor Puerto Rico Trench Guyots are underwater volcanic mountains with flat tops. 200 Meters below the sea. Diameter can exceed 10 Km