Which erosional process leads to oxbow lake formation when a river erodes its banks?

💡 Explanation

When a river erodes its banks, lateral migration from helicoidal flow occurs because secondary circulation cells transport sediment toward the outer bank, resulting in increased erosion and meander cutoffs, eventually creating oxbow lakes. Therefore migration causes oxbow formation; other processes don't dynamically cut the river channel in that pattern.

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• Which effect intensifies when freeze-thaw cycles erode bedrock within a glacial cirque?
• Which outcome results when a meandering stream breaches its levee system during high discharge?
• Which primary effect occurs as a result of the cyclic elastic strain accumulation near strike-slip fault lines?