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See also:LAGOON (Fr. lagune, See also:Lat. lacuna, a See also:pool) , a See also:term applied to (I) a See also:sheet of See also:salt or brackish See also:water near the See also:sea, (2) a sheet of fresh water of no See also:great See also:depth or extent, (3) the expanse of smooth water enclosed by an See also:atoll . Sea lagoons are formed only where the shores are See also:low and protected from See also:wave See also:action . Under these conditions a See also:bar may be raised above sea-level or a See also:spit may grow until its end touches the See also:land . The enclosed shallow water is then isolated in a wide stretch, the seaward See also:banks broaden, and the See also:lagoon becomes a permanent See also:area of still shallow water with See also:peculiar faunal features . In the old See also:lake plains of See also:Australia there are occasional wide and shallow depressions where water collects permanently . Large See also:numbers of aquatic birds, See also:black swans, See also:wild See also:duck, See also:teal, migrant See also:spoon-bills or pelicans, resort to these fresh-water lagoons . |
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