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MARSH (O. F. mersc, for merisc, a pla...

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Originally appearing in Volume V17, Page 769 of the 1911 Encyclopedia Britannica.
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MARSH (O. F. mersc, for merisc, a See also:place full of "See also:meres" or pools; cf. Ger. See also:Meer, See also:sea, See also:Lat. See also:mare)  , an See also:area of See also:low-lying watery See also:land . The significance of a See also:marsh area is not so much in the manner of its formation as in the See also:peculiar chemical and See also:physical results that accompany it, and its relation to the ecology of plant and See also:animal See also:life . Chemically it is productive of such gases as arise from decomposing vegetation and are transitory in their effects, and in the See also:production of hydrated See also:iron See also:oxide, which may be seen floating as an iridescent scum at the edge of rusty, marshy pools . This sinks into the See also:soil and forms a powerful iron See also:cement to many sandstones, binding them into a hard See also:local See also:mass, while the surrounding sandstones are loose and friable . A curious morphological See also:inversion follows in a later See also:geological See also:period, the marsh area forming the hard cap of a See also:hill (see See also:MESA) while the surrounding sandstones are weathered away . See also:Salt marshes are a feature of many low-lying See also:sea-coasts and areas of inland drainage .

End of Article: MARSH (O. F. mersc, for merisc, a place full of "meres" or pools; cf. Ger. Meer, sea, Lat. mare)
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