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  2. Seabed - Wikipedia

    en.wikipedia.org/wiki/Seabed

    The seabed (also known as the seafloor, sea floor, ocean floor, and ocean bottom) is the bottom of the ocean. All floors of the ocean are known as 'seabeds'. The structure of the seabed of the global ocean is governed by plate tectonics. Most of the ocean is very deep, where the seabed is known as the abyssal plain. Seafloor spreading creates ...

  3. Marine sediment - Wikipedia

    en.wikipedia.org/wiki/Marine_sediment

    Marine sediment, or ocean sediment, or seafloor sediment, are deposits of insoluble particles that have accumulated on the seafloor.These particles either have their origins in soil and rocks and have been transported from the land to the sea, mainly by rivers but also by dust carried by wind and by the flow of glaciers into the sea, or they are biogenic deposits from marine organisms or from ...

  4. Marine geology - Wikipedia

    en.wikipedia.org/wiki/Marine_geology

    Marine geology or geological oceanography is the study of the history and structure of the ocean floor. It involves geophysical, geochemical, sedimentological and paleontological investigations of the ocean floor and coastal zone.

  5. Sea - Wikipedia

    en.wikipedia.org/wiki/Sea

    These currents can shift great volumes of sand or pebbles, create spits and make beaches disappear and water channels silt up. [59] A rip current can occur when water piles up near the shore from advancing waves and is funnelled out to sea through a channel in the seabed. It may occur at a gap in a sandbar or near a man-made structure such as a ...

  6. Sand dredging is 'sterilising' ocean floor, UN warns - AOL

    www.aol.com/news/sand-dredging-sterilising-ocean...

    Around 6 billion tons of marine sand is being dug up each year in a growing practice that a U.N. agency said is unsustainable and can wipe out local marine life irreversibly. Sand is the most ...

  7. Ocean - Wikipedia

    en.wikipedia.org/wiki/Ocean

    The ocean is the body of salt water that covers approximately 70.8% of Earth. [8] In English, the term ocean also refers to any of the large bodies of water into which the world ocean is conventionally divided. [9] The following names describe five different areas of the ocean: Pacific, Atlantic, Indian, Antarctic/Southern, and Arctic.

  8. Sand - Wikipedia

    en.wikipedia.org/wiki/Sand

    Sand is a granular material composed of finely divided mineral particles. Sand has various compositions but is defined by its grain size. Sand grains are smaller than gravel and coarser than silt. Sand can also refer to a textural class of soil or soil type; i.e., a soil containing more than 85 percent sand-sized particles by mass. [2]

  9. Surf break - Wikipedia

    en.wikipedia.org/wiki/Surf_break

    A type of open ocean surf break, these occur where sand build ups occur well offshore to produce breaking waves in the open ocean, which are sometimes called 'Outer Banks', which are similar to open ocean reefs except that they are generally made of sand, and may disappear or change with storms. The 'Outer Banks' in North Carolina is an example.

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