Which outcome occurs when sediment discharge surpasses capacity at canyon mouths?

💡 Explanation

Alluvial fan deposition occurs because increased sediment discharge leads to reduced carrying capacity, thus causing sediment to rapidly accumulate. This is stream gradient reduction, therefore sediment deposition, rather than erosion that would occur with increased flow velocity.

• Which geological hazard is most directly related to the stress accumulation along a transform fault boundary?
• Which mechanism causes buoyant magma to ascend during intraplate volcanism?
• Which mechanism causes dry conditions at latitudes around 30 degrees north and south?
• Which atmospheric phenomenon results when Coriolis force deflects geostrophic winds around a high-pressure system at altitude?
• Which phenomenon results when Earth's rotation causes subtropical atmospheric pressure cells to produce consistent deflection?
• Which process limits sediment buildup on steep upper reaches of alluvial fans?