Under normal conditions, which one of the following is the correct seq...
Waterfalls are made in rier in young stage. It is not a permanent landform. Actually the rivers try to grade themselves through vertical erosion in relation to base level of erosion.
River terraces are the narrow flat surfaces on either side of the valley floor. sometimes, the river valleys are frequented by several terraces on either side wherein they are arranged in step like forms.
Meander bars generally from in youthful stage of river.
Oxbow lakes are nest landform made after meander bars.
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Under normal conditions, which one of the following is the correct seq...
Waterfalls - River terraces - Meander bars - Oxbow lakes
1. Waterfalls:
Waterfalls are formed when a river flows over a steep drop in its course. The force of the flowing water erodes the rock and creates a vertical drop. Over time, the waterfall retreats upstream due to erosion, resulting in the formation of a gorge or canyon.
2. River terraces:
River terraces are flat, elevated landforms found on the sides of a river valley. They are formed as a result of the river downcutting into its own floodplain. As the river erodes the floodplain, the older floodplain levels are left stranded at higher elevations, forming terraces.
3. Meander bars:
Meander bars are formed within a river's meander loop. As a river flows, it erodes the outer bank of a meander bend and deposits sediment on the inner bank. Over time, this deposition forms a point bar or meander bar. Meander bars are typically composed of sand or gravel and are found on the inside of a meander loop.
4. Oxbow lakes:
Oxbow lakes are crescent-shaped bodies of water that were once part of a meandering river. As a river meanders, the outer bends of the meander loop erode and the inner bends accumulate sediment. Eventually, the neck of the meander loop becomes narrow and the river cuts through the neck, forming a new, straighter channel. This leaves behind a separated body of water, known as an oxbow lake.
Explanation:
Fluvial action refers to the processes and features formed by the action of rivers. The correct sequential development of features made by fluvial action under normal conditions is waterfalls, river terraces, meander bars, and oxbow lakes. This sequence represents the natural progression of river erosion and deposition.
- Waterfalls are formed due to the erosion of rock by flowing water, creating a steep drop.
- River terraces are formed as a result of the river downcutting into its own floodplain, leaving behind elevated landforms.
- Meander bars form within a river's meander loop through erosion of the outer bank and deposition on the inner bank.
- Oxbow lakes are formed when a meander loop is cut off from the main river channel, leaving behind a crescent-shaped body of water.
Therefore, option C, which states waterfalls, river terraces, meander bars, and oxbow lakes in sequential order, is the correct answer.
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