Which change directly causes alluvial fan deposition at a mountain range exit point?

💡 Explanation

When a stream exits a mountain range onto a plain, decreased slope causes deceleration, reducing sediment carrying capacity due to reduced flow competence. Therefore, deposition occurs (forming an alluvial fan) rather than continued transport, erosion, or altered uplift each requiring increased carrying capacity/power.

• Which climate outcome occurs when Walker circulation weakens during intense El Niño events?
• Which outcome occurs when a glacial lake outburst?
• Which process controls uplift when two continental plates collide at reverse fault zones?
• Which crustal deformation mechanism results from the isostatic rebound after removal of ice sheets after subduction stops?
• Which process generates a tarn when glacial ice melts within a cirque basin?
• Which mineral cycle is most accelerated when coastal upwelling weakens due persistent high-pressure systems?