Which mechanism causes the deepening of a fjord's basin over geologic timescales?

💡 Explanation

Deepening of a fjord's basin occurs through glacial abrasion because the rotational ice movement grinds the bedrock via embedded sediment, causing significant erosion. Therefore abrasion deepens the basin, rather than rebound resisting, deposition filling, or weathering dominating, all requiring different environmental conditions and acting at slower rates.

• Which mechanism causes increased flood risk when vegetation is removed from an alluvial plain?
• Across a volcanic barrier island, which consequence arises from diminished longshore drift processes?
• Which oceanographic consequence results from intensification of the planetary Coriolis effect at higher latitudes?
• Which mechanism causes increased ocean atmospheric CO2 absorption during coastal upwelling events?
• Which slope deformation is most directly attributable to thawing permafrost layer above an impermeable frozen subsurface?
• Which geological feature typically forms due to the lateral shearing motion at a transform plate boundary?