Swirling sandbars creep along Oregon Inlet, part of Cape Hatteras National Seashore on the Outer Banks of North Carolina. The Outer Banks is a series of sand bars that separate three estuaries (Currituck Sound, Albemarle Sound, and Pamlico Sound) from the Atlantic Ocean.

Photograph by David Alan Harvey
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lagoon
lagoon Encyclopedic Entry

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A lagoon is a shallow body of water that may have an opening to a larger body of water, but is also protected from it by a sandbar or coral reef