GEOLOGY

Detailed explanation-1: -Oxbow lakes usually form in flat, low-lying plains close to where the river empties into another body of water. On these plains, rivers often have wide meanders. Meanders that form oxbow lakes have two sets of curves: one curving away from the straight path of the river and one curving back.

Detailed explanation-2: -A meander is when water flows in a curvy, bendy path, like a snake. As a river makes its way through an area that is relatively flat, it often develops bends as it erodes its way through the path of least resistance.

Detailed explanation-3: -Low-gradient streams cut wide valleys because their channels tend to shift sideways. Most low-gradient streams do this by meandering. A meandering stream is a stream with a channel that curves or loops back and forth on a wide floodplain.

Detailed explanation-4: -Meanders are produced when water in the stream channel erodes the sediments of an outer bend of a streambank and deposits this and other sediment on subsequent inner bends downstream. This process reinforces the riffle-pool structure of a stream.

Detailed explanation-5: -Sediments deposit between the path of river, so forms a curve structure called oxbow lake. and, Sadiments deposit on the mouth of the ocean, when river mixes in a sea or ocean, the triangular sediments are formed due to which rivers divide into different channels, so, it is called delta.