Tuesday 23 February 2016

FORMATION OF OX-LAKE


great geography animations <b>ox bow</b> <b>lakes</b> and more 3 dec

AS-Formation of meanders and ox-bow lakes | Geography is easy
An oxbow is a crescent-shaped lake lying alongside a winding river. The oxbow lake is created over time as erosion and deposits of soil change the river's course. You can see how an oxbow lake takes shape below:
(1) On the inside of the loop, the river travels more slowly leading to deposition of silt.
(2) Meanwhile water on the outside edges tends to flow faster, which erodes the banks making the meander even wider.
(3) Over time the loop of the meander widens until the neck vanishes altogether.
(4) Then the meander is removed from the river's current and the horseshoe shaped oxbow lake is formed.
Without a current to move the water along, sediment builds up along the banks and fills in the lake



5.The loop continues to bend further and further, until athin strip of land called a neck is created at thebeginning and the end of the meander.


6. Eventually, the narrow neck is cut through by eithergradual erosion When this happens, a new straighterchannel is created, diverting the flow of the river from


7. Deposition finally seals the cut-off from the riverchannel, leaving a horseshoe-shaped oxbow lake.

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