Which outcome occurs when intense weathering produces abundant sediment upslope from a confined valley exit onto a plain?

💡 Explanation

When intense weathering produces significant sediment, alluvial fan formation occurs because the confined stream expands onto a plain, depositing sediment in a radiating pattern due to reduced flow velocity and increased channel instability. Therefore alluvial fan sedimentation results, rather than levees, braided streams, or oxbow lakes which require different fluvial dynamics and channel patterns.

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