Arrange the following stages in the formation of an oxbow lake in the correct sequential order from first to last.
- 1The river forms a pronounced meander loop with a narrow neck.
- 2Continuous lateral erosion on the outer bends and deposition on the inner bends further narrow the neck of the meander.
- 3The river cuts straight through the narrow neck during a period of high discharge or flood.
- 4Sediment deposition seals off both ends of the old meander loop, leaving an isolated crescent-shaped body of standing water.
Cevap
The correct sequence of oxbow lake formation begins with the river forming a pronounced meander loop, followed by continuous erosion and deposition narrowing the neck. The river then cuts straight through the neck during a flood, and finally deposition seals off the abandoned loop to form an oxbow lake.
The correct order follows the progressive geomorphic stages of oxbow lake development: initial meander development with a narrow neck, neck narrowing through lateral erosion and deposition, sudden neck cut-off during a flood event, and final isolation of the crescent lake by alluvial deposition at the entrance and exit of the abandoned loop.
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Anahtar Kavram
Fluvial meander evolution and cut-off mechanisms leading to oxbow lake formation