Which mechanism primarily sculpts the U-shaped profile of fjords?

💡 Explanation

Glacial valleys are broadened and deepened by glacial erosion involving abrasion and plucking, because the immense weight and slow movement cause significant wearing of the bedrock; therefore, U-shaped valleys form rather than V-shaped valleys from river erosion.

• Which phenomenon results when subtropical high-pressure cells intensify and expand poleward?
• Which outcome enhances lahar formation during tropical storms?
• Which continental effect drives increased aridity downwind of mountain ranges?
• Which mechanism significantly increases flood risk in an alluvial river system after deforestation in the upstream drainage basin?
• Which rapid decline in air quality will result when a pyroclastic flow enters a densely forested ravine?
• Which influence diminishes cryoturbation in periglacial sorted circles?