Which mechanism explains anomalously deep fjord depths compared to adjacent continental shelf areas?

💡 Explanation

When glaciers advance and retreat, erosion by prolonged glacial scouring excavates deep troughs because ice thickness and pressure drastically increase cutting power, unlike normal rivers. Therefore erosion results in fjord depths much deeper than continental shelves, rather than rebound, subsidence or deposition which operate independent mechanisms.

• Which process exacerbates liquefaction during seismic activity, resulting in structural instability?
• Which process significantly influences the rate of sediment accumulation in a fjord with actively calving glaciers?
• Which biogeochemical effect occurs when coastal upwelling is suppressed due to stronger subtropical gyre stratification?
• Which process primarily dictates sediment sorting along coastlines during longshore drift?
• Which phenomenon causes nutrient enrichment in surface waters during coastal upwelling?
• Which process significantly weakens the Atlantic Meridional Overturning Circulation (AMOC) when Arctic ice melt accelerates?