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Geography

Why River Meanders Migrate Across Floodplains Over Time

Quick fact

In the Mississippi River, some meanders have migrated visibly over decades, occasionally cutting off to form crescent-shaped oxbow lakes that remain on the floodplain as evidence of the river's older paths.

Why this is interesting

A river that looks fixed and permanent in one snapshot can shift its entire course over decades. How does a seemingly calm channel slowly carve a new path across its floodplain?