Ocean floor

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Ocean floor

  1. 1. Ocean floor
  2. 2. The ocean floor Many of the important features of the oceans are hidden in deep water. The continental margin is the region around continents that includes the:  continental shelf,  continental slope, and  continental rise.
  3. 3. The continental shelf Sand drifting down the steep face of a continental shelf cuts into the shelf just like streams cut into valleys.
  4. 4. Features of the ocean floor Maps can show the location of the continental shelf. The true ocean floor is called the abyssal plain. It is flat and smooth because a thick layer of sediment covers its features.
  5. 5. The deep ocean floor  A barrier island is a low, sandy island that lies parallel to the shoreline.  A bank is a low, flat region on the continental shelf.  A seamount is a steep- sided mountain that rises from the ocean floor.
  6. 6. The deep ocean floor A guyot is a seamount that has eroded so that it has a flat top and is underwater. Mid-ocean ridges mark places where two tectonic plates are separating and new ocean crust is being made. Deep-ocean trenches are the deepest parts of the ocean.
  7. 7. Investigation 22C Global Winds and Ocean Currents Key Question:  How do temperature and salinity cause ocean layering?
  8. 8. Rip Currents More than 80% of water rescues performed by surf beach lifeguards are due to rip currents. Rip currents are sometimes called riptides, or undertow. Learn why these two terms are misleading.

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