Downstream fining occurs in alluvial fans because of sediment transport which leads to what outcome?

💡 Explanation

Coarser sediments are deposited closer to the source because competence reduction means larger grains deposit first, therefore the finer grains are transported further, rather than uniform distribution or distal coarsening.

• Which effect diminishes effectiveness if marine protected areas are declared within strong oceanic gyres?
• Which risk is magnified where loess deposits form terraces?
• Which thermal consequence occurs when reduced wind stress weakens subtropical ocean gyre circulation?
• Which risk increases for nearby communities when a rhyolitic lava dome's growth stalls?
• Which hydrological outcome is accelerated when overlying soil collapses into a sinkhole?
• Which risk increases when a river's flow encounters highly erodible alluvial sediments during seasonal floods?