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In hydrologic terms, an '''Estuary''' is the thin zone along a coastline where freshwater systems and rivers meet and mix with a salty ocean.  Examples include bays, river mouths, salt marshes, and lagoons.

In hydrologic terms, an '''estuary''' is the tidal zone ('''aestus''' - Latin for tide), along a coastline where freshwater river systems meet and mix with a salty ocean.  Examples include bays, river mouths, salt marshes, and lagoons.

[[Category:Ecology]]

[[Category:Geography|Ecology]]