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atoll |
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atoll: see coral reefs coral reefs, limestone formations produced by living organisms, found in shallow, tropical marine waters. In most reefs, the predominant organisms are stony corals , colonial cnidarians that secrete an exoskeleton of calcium carbonate (limestone). ..... Click the link for more information. . atollCoral reef enclosing a lagoon. Atolls consist of ribbons of reef that may not be circular but that are closed shapes, sometimes miles across, around a lagoon that may be 160 ft (50 m) deep or more. Most of the reef itself is usually below the water surface; around the rim along the top are usually low, flat islands or more continuous strips of low, flat land.
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The atoll of Hikueru lay low on the water, a circle of pounded coral sand a hundred yards wide, twenty miles in circumference, and from three to five feet above high-water mark. Didn't he fetch the atoll after eighteen days in the longboat? I live on an atoll, a low island, it is a strip of land surrounding a lagoon, and its beauty is the beauty of the sea and sky and the varied colour of the lagoon and the grace of the cocoa-nut trees; but the place where Strickland lived had the beauty of the Garden of Eden. |
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atoll
