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← GeographyWhich phenomenon creates crescent-shaped oxbow lakes along meandering fluvial systems?
A)Differential erosion and sediment deposition✓
B)Isostatic rebound after glacial melting
C)Tectonic subsidence and fault propagation
D)Pyroclastic flow impedance post eruption
💡 Explanation
When rivers meander, differential erosion occurs on the outside of bends and sediment deposition takes place on inside curves because of varying flow velocities creating loops which are then pinched off. Therefore oxbow formation results, reflecting erosion and deposition, rather than glacial uplift, tectonic activity, or volcanic effects which require different geological triggers.
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