. The ecology of delta marshes of coastal Louisiana : a community profile . PONCHARTRAIN L BORGNE VI VERMILION FRESH INTERMEDIATE ^""'j BRACKISH SAl I Mineral order of Figure 26. arranged in PERCENT MINERAL CONTENT content of marsh soils increasing age (data from 100 50 0 in Mississippi Chabreck 1972). delta hydro!ogic units. The Ponchartrain-Lake Borgne basin (Unit I) is fed by a number of small, local streams, by the Pearl River, and periodically by diversion of the Missis- sippi River through the Bonnet Carre 'â '-- â â ^'-" The Vermil ion

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Keywords: ., bookcentury1900, bookcollectionbio, booksubjectwetlandslouisiana