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  2. Coral reef - Wikipedia

    en.wikipedia.org/wiki/Coral_reef

    They are most commonly found at shallow depths in tropical waters, but deep water and cold water coral reefs exist on smaller scales in other areas. Shallow tropical coral reefs have declined by 50% since 1950, partly because they are sensitive to water conditions. [ 9 ]

  3. Marine sediment - Wikipedia

    en.wikipedia.org/wiki/Marine_sediment

    Shallow water marine environments are found in areas between the shore and deeper water, such as a reef wall or a shelf break. The water in this environment is shallow and clear, [15] allowing the formation of different sedimentary structures, carbonate rocks, coral reefs, and allowing certain organisms to survive and become fossils.

  4. Coral - Wikipedia

    en.wikipedia.org/wiki/Coral

    The classification of corals has been discussed for millennia, owing to having similarities to both plants and animals. Aristotle's pupil Theophrastus described the red coral, korallion, in his book on stones, implying it was a mineral, but he described it as a deep-sea plant in his Enquiries on Plants, where he also mentions large stony plants that reveal bright flowers when under water in ...

  5. Marine biogenic calcification - Wikipedia

    en.wikipedia.org/wiki/Marine_biogenic_calcification

    Marine biogenic calcification is the production of calcium carbonate by organisms in the global ocean.. Marine biogenic calcification is the biologically mediated process by which marine organisms produce and deposit calcium carbonate minerals to form skeletal structures or hard tissues.

  6. Marine geology - Wikipedia

    en.wikipedia.org/wiki/Marine_geology

    Plate tectonics is a scientific theory developed in the 1960s that explains major land form events, such as mountain building, volcanoes, earthquakes, and mid-ocean ridge systems. [26] The idea is that Earth's most outer layer, known as the lithosphere, that is made up of the crust and mantle is divided into extensive plates of rock.

  7. 50 Of The Most Fascinating, Stunning And Dangerous Natural ...

    www.aol.com/100-most-incredible-stunning-strange...

    The sap in the stem of the plants will expand (water expands when frozen), causing long, thin cracks to form along the length of the stem. Image credits: Kenneth Allen #46 Desert Rose Crystals

  8. Marine ecosystem - Wikipedia

    en.wikipedia.org/wiki/Marine_ecosystem

    This is typically found where rivers meet the ocean or sea. The wildlife found within estuaries is unique as the water in these areas is brackish - a mix of freshwater flowing to the ocean and salty seawater. [20] Other types of estuaries also exist and have similar characteristics as traditional brackish estuaries. The Great Lakes are a prime ...

  9. Stromatolite - Wikipedia

    en.wikipedia.org/wiki/Stromatolite

    They are composed of aragonite and grow by precipitation of calcite from sub-lacustrine karst-water. [49] Freshwater stromatolites are found in Lake Salda in southern Turkey. The waters are rich in magnesium and the stromatolite structures are made of hydromagnesite. [50]

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