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Tombolo
Deposition landform in which an island is connected to the mainland by a sandy isthmus / From Wikipedia, the free encyclopedia
For the Italian town, see Tombolo, Veneto.
A tombolo is a sandy or shingle isthmus. A tombolo, from the Italian tombolo, meaning 'pillow' or 'cushion', and sometimes translated incorrectly as ayre (an ayre is a shingle beach of any kind), is a deposition landform by which an island becomes attached to the mainland by a narrow piece of land such as a spit or bar.[1] Once attached, the island is then known as a tied island.
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Several islands tied together by bars which rise above the water level are called a tombolo cluster.[2] Two or more tombolos may form an enclosure (called a lagoon) that can eventually fill with sediment.