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Oceanography Vocab

TermDefinition
Continental Shelf The gently sloping section of the continental margin located between the shoreline and the continental slope.
Continental Slope The steeply inclined section of the continental margin located between the continental rise and the continental shelf.
Continental Rise The gently sloping section of the continental margin located between the continental slope and the abyssal plain.
Abyssal Plain A large, flat, almost level are of the deep-ocean basin.
Mid- Ocean Ridge A long, undersea mountain chain that forms along the floor of the major oceans.
Rift Valley A long, narrow valley that forms a tectonic plates separate.
Seamount A submerged mountain on the ocean floor that is at least 1,000 m high and that has a volcanic origin.
Ocean Trench A steep, long depression in the deep-sea floor that runs parallel to a chain of volcanic islands or a continental margin.
Continental Margin Is the zone of the ocean floor that separates the thin ocean crust from thick continental crust.
Plankton The mass of mostly microscopic organisms that float or drift freely in freshwater and marine environments.
Nekton All organisms that swim actively in open water, independent of currents.
Benthos The organisms that live at the bottom of the sea or ocean.
Benthic Environment The region near the bottom of a pond, lake, or ocean.
Pelagic Environment In the ocean, the zone near the surface or at middle depths, beyond the sub littoral zone and above the abyssal zone.
Inter Tidal Zone Is the area that is above water at low tide and underwater at high tide.
Hadal Zone Is the delineation for the deepest trenches in the ocean,
Bathyl Zone Is the part of a pelagic zone that extends from a depth of 1000 to 4000 meters below the ocean surface.
Sublittoral Zone The sea-shore zone lying immediately between the littoral zone and extending to a depth of about 200 m or to the edge of the continental shelf.
Holdfasts A stalked organ by which an alga or other simple aquatic plant or animal is attached to a substrate.
Created by: bluefish03
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