The longest sand spit on earth is the Curonian Spit.
Well, do you mean a sand SPIT?
how does a spit form
spit
spit forms as a result of deposition by longshore drift
spit forms as a result of deposition by longshore drift
Beaches, Sand bars and Spits.
Where a coastline turns and interrupts longshore drift, sand may be deposited in a fingerlike landform called a spit.
Sand spits form when elongated sandbars remain in place due to wave action along a shoreline. The spit can remain attached to the shore as an isthmus, or a bar can be separated to form a barrier island. Tombolos can create the same form but in the opposite manner. An island near the shore accumulates sandbars in the separating strait, and can become a "tied island" when the tombolo creates a permanent land bridge.
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Sand Spit: A sand spit is an elongated line of sand that usually extends parallel to shore. Barrier Islands: Barrier Islands are long,narrow coastal island.
A "sand spit" is an elongated line of sand (or sandbar) that usually extends parallel to the shore, connected to the mainland. If it grows high enough to survive tides, it can become a peninsula. If it is separated from the land after forming, it can become an offshore barrier island.