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How do oxbow lakes form from a river bend?
Quick Answer
An oxbow lake forms when a river cuts off a meander loop and leaves a crescent-shaped lake behind. This usually happens during floods when the river takes a shorter path.
The Full Story
Oxbow lakes begin as tight meanders that become more and more curved over time. During a flood, the river may erode through the narrow neck of land separating two sides of the bend. When the river adopts the new straighter channel, the old loop is cut off and gradually becomes an isolated lake. Sediment can later fill the lake, turning it into a marsh or wetland.
Key Facts
1.Formed by cutoff meanders
2.Often created during floods
3.Can become wetlands over time
YouTube Angle
Suggested video title for this topic:
"How a river can leave behind a horseshoe lake"
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