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← GeographyWhich outcome occurs when sediment supply outpaces subsidence in a region where multiple alluvial fans coalesce?
A)Formation of a bajada landform✓
B)Increased stream channel incision
C)Enhanced chemical weathering rates
D)Decreased groundwater recharge rates
💡 Explanation
A bajada forms because lateral sediment deposition via *sediment aggradation* causes alluvial fans to merge. This results in a gently sloping plain at the base of mountains, therefore more bajada formation, rather than channel incision which would require increased flow.
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