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Geography

How Tectonic Subsidence Shapes River Delta Morphology

Quick fact

The Mississippi River Delta is subsiding at rates of up to 25 mm per year in some areas, which is faster than the rate of sediment deposition, causing the delta to retreat and wetlands to disappear.

Why this is interesting

Imagine a river delta as a living, breathing landform that can swallow entire cities over time. What happens when the ground beneath it is slowly sinking?