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Questions and Answers
What is the initial effect of undercutting on the outside of a meander?
What is the initial effect of undercutting on the outside of a meander?
- The meander becomes smaller
- The meander becomes larger (correct)
- The river changes direction
- The neck of the meander widens
What is the eventual outcome of a swans neck meander?
What is the eventual outcome of a swans neck meander?
- The meander is reformed
- The meander becomes a straight section of the river
- The river cuts through the neck (correct)
- The river continues to flow through the meander
What happens to the river after it cuts through the neck of a meander?
What happens to the river after it cuts through the neck of a meander?
- It continues to flow through the meander
- It forms a new ox bow lake
- It continues its new straighter path (correct)
- It returns to its original course
What seals off the ends of the cut-off meander?
What seals off the ends of the cut-off meander?
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What is the final outcome of the process of meander formation and abandonment?
What is the final outcome of the process of meander formation and abandonment?
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Study Notes
Meander Evolution
- Undercutting on the outside of a meander can cause collapse, leading to the enlargement of the meander
- The neck of a meander narrows over time, forming a characteristic "swan's neck" shape
- During periods of high discharge, the river may cut through the neck of the meander, creating a new path
- As a result, the river abandons the original meander, adopting a straighter course
- The cut-off meander is eventually sealed off by new deposition, forming an oxbow lake
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Description
This quiz explains the process of oxbow lake formation through the erosion and deposition of a meandering river. Learn how the river's path changes over time, creating a new lake.
