salt marsh

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Wetland with halophytic vegetation (tolerant to seawater). Salt marshes develop around estuaries and on the sheltered side of sand and shingle spits. They are formed by the deposition of mud around salt-tolerant vegetation. This vegetation must tolerate being covered by seawater as well as being exposed to the air. It also traps mud as the tide comes in and out. This helps build up the salt marsh. Salt marshes usually have a network of creeks and drainage channels by which tidal waters enter and leave the marsh.

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