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Barrier island contrasted with other coastal landforms. Barrier islands are a coastal landform, a type of dune system and sand island, where an area of sand has been formed by wave and tidal action parallel to the mainland coast. [1] They usually occur in chains, consisting of anything from a few islands to more than a dozen.
The Mississippi–Alabama barrier islands are a chain of barrier islands in the Gulf of Mexico along the coasts of Mississippi and Alabama enclosing the Mississippi Sound.The major islands are Cat Island, Ship Island, Horn Island, Petit Bois Island, and Dauphin Island; in the early 20th century the chain also included the Isle of Caprice, which has since been submerged.
The Outer Banks (frequently abbreviated OBX) are a 200 mi (320 km) string of barrier islands and spits off the coast of North Carolina and southeastern Virginia, on the east coast of the United States. They line most of the North Carolina coastline, separating Currituck Sound, Albemarle Sound, and Pamlico Sound from the Atlantic Ocean.
Hurricane Ian underscores the vulnerability of the nation's barrier islands and the increasing costs of people living on the thin strips of land that parallel the coast. ... They typically form as ...
Gulf Islands National Seashore geologic cross section. The barrier islands started forming 4500–5400 years ago. On the north side of the islands, the beaches are broad, while on the south side, the beaches include 2 metres (6.6 ft) high dunes on average, but with some reaching 6 metres (20 ft).
Barrier islands are long, sandy bars that form along shorelines due to the deposition of sediment by waves. These islands erode and grow as the wind and waves shift. Barrier islands have the effect of protecting coastal areas from severe weather because they absorb some of the energy of large waves before they can reach the shore. [14]
A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as reefs, barrier islands, barrier peninsulas, or isthmuses. Lagoons are commonly divided into coastal lagoons (or barrier lagoons) and atoll lagoons. They have also been identified as occurring on mixed-sand and gravel coastlines.
When Hurricane Ian struck Florida’s Gulf Coast, it washed out the bottom level of David Muench's home on the barrier island of Sanibel along with several cars, a Harley-Davidson and a boat.