A bar is a linear shoaling landform feature within a body of water. Bars tend to be long and narrow (linear) and develop where a current (or waves) promote deposition of granular material, resulting in localized shallowing (shoaling) of the water. Bars can appear in the sea, in a lake, or in a river. They are typically composed of sand, although could be of any granular matter that the moving water has access to and is capable of shifting around (for example, soil, silt, gravel, cobble, shingle, or even boulders). The grain size of the material comprising a bar is related to the size of the waves or the strength of the currents moving the material, but the availability of material to be worked by waves and currents is also important. A vessel run aground on a bar is arguably worse off than one run aground on stationary rocks, because of the destructive capacity of the shifting action.
The term bar can apply to landform features over a considerable range in size, from just a few meters in a small stream to marine depositions stretching for hundreds of kilometres along a coastline, often called barrier islands.
In a nautical sense, a bar is a shoal, similar to a reef: a shallow formation of (usually) sand that is a navigation or grounding hazard. It therefore applies to a silt accumulation that shallows the entrance to or the course of a river or creek.
http://en.wikipedia.org/wiki/Bar_%28landform%29
River islands occur in river deltas and in large rivers. They are caused by deposition of sediment at points in the flow where the current loses some of its carrying capacity. In essence, they are river bars, isolated in the stream. While some are ephemeral, and may disappear if the river's water volume or speed changes, others are stable and long-lived.
http://en.wikipedia.org/wiki/Island#River_islands
2006-08-09 02:36:50
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answer #1
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answered by Anonymous
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An island
2006-08-09 06:38:20
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answer #2
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answered by Anonymous
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There's no special name for it I don't think, though smaller islands are also known as 'isle', 'eye' and 'inch' in Britain for example. The most wellknown 'island in the stream' is "Ile de France" in the heart of Paris. However, even that one is called but an island.
2006-08-09 01:10:56
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answer #3
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answered by McAtterie 6
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Yep, a sandbar....here is the definition:
In geography, a bar is a linear shoaling landform feature within a body of water. Bars tend to be long and narrow (linear) and develop where a current (or waves) promote deposition of particles, resulting in localized shallowing (shoaling) of the water. Bars can appear in the sea, in a lake, or in a river. ...
2006-08-08 22:12:14
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answer #4
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answered by < Roger That > 5
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Definition of Island is Land mass sourrounded by Water body. So now you have the answer
2006-08-08 22:02:48
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answer #5
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answered by Anonymous
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It is still called an island.
A sandbar, BTW is just that, a sand bar, and they are usually not permanent.
2006-08-08 22:23:59
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answer #6
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answered by mm 2
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Sandbar.
2006-08-08 22:01:26
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answer #7
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answered by Anonymous
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Eyot
2006-08-09 11:05:36
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answer #8
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answered by Anonymous
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an island...put the crack pipe down and go back to school
2006-08-09 17:44:10
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answer #9
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answered by doug m 1
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magadascar
2006-08-09 00:41:50
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answer #10
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answered by Irina C 6
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