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Seafloor features1
 

Seafloor features1

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    Seafloor features1 Seafloor features1 Presentation Transcript

    • Oceanography
      The scientific study of the oceans and oceanic phenomena.
    • Bathymetry
      The measurement of ocean depths and the charting of the shape or topography of the ocean floor.
    • Submersible
      A small underwater craft used for deep sea research.
    • Sonar
      An electric depth-sounding mechanism; sonar calculates ocean depth.
    • Continental Margin
      That portion of the seafloor adjacent to the continents.
    • Continental Shelf
      The gently sloping submerged portion of the continental margin, extending from the shoreline to the continental slope.
    • Continental Slope
      The steep gradient that leads to the deep-ocean floor and marks the seaward edge of the continental shelf.
    • Submarine Canyon
      A seaward extension of a valley that was cut on the continental shelf during a time when the sea level was lower.
    • Turbidity Current
      A downslope movement of dense, sediment- laden water created when sand and mud on the continental shelf and slope are dislodged and thrown into suspension.
    • Continental Rise
      The gently sloping surface at the base of the continental slope.
    • Ocean basin floor
      Area of the deep-ocean floor between the continental margin and the oceanic.
    • Abyssal plains
      Very level area of the deep-ocean floor, usually lying at the foot of the continental.
    • Seamount
      An isolated volcanic peak that rises at least 1000 meters above the deep-ocean floor.
    • Mid-ocean Ridge
      A continued elevated zone on the floor of all the major ocean basins and varying in width from 1000 to 4000 kilometers.
    • Seafloor Spreading
      The process by which plate tectonics produces new oceanic lithosphere at ocean ridges.