Shoal
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A shoal is a natural submerged ridge, bank, or bar that consists of, or is covered by, sand or other unconsolidated material, and rises from the bed of a body of water close to the surface or above it
Sandbar between St Agnes and Gugh on the Isles of Scilly, off the coast of Cornwall, England, United Kingdom
A tidal sandbar connecting the islands of Waya and Wayasewa of the Yasawa Islands, Fiji
Sandbar between Nosy Iranja Be and Nosy Iranja Kely (Nosy Iranja, Madagascar)
Amanohashidate in Miyazu, Kyoto Prefecture, Japan
Isthmus
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An isthmus is a narrow piece of land connecting two larger areas across an expanse of water by which they are otherwise separated. A tombolo is an isthmus that consists of a spit or bar, and a strait
Shoal
…of the process of coastal erosion, such as spits and baymouth bars that form across the front of embayments and rias. A tombolo is a bar that forms an isthmus between an island or offshore rock and a mainland shore. In places of reentrance along a coastline (such as inlets, coves, rias, and bays), sediments…
The sandy isthmus or tombolo "The Neck" connects North and South Bruny Island in Tasmania, Australia.
Aerial perspective of the isthmus of Bruny Island
Fernando noronha