Q. How are the fjords formed? Why do they constitute some of the most picturesque areas of the world?

Model Answer: 

Fjords are deep, narrow, and elongated coastal inlets characterized by steep sides, primarily found in glaciated higher latitudes like Scandinavia.

Mechanism of Fjord Formation

• Glacial Carving: Moving valley glaciers severely erode existing V-shaped river valleys, transforming them into steep-sided, flat-bottomed U-shaped troughs.
• Over-deepening: Intense basal erosion by thick, heavy ice cuts the valley floor hundreds of meters below the contemporary sea level.
• Coastal Submergence: Post-Pleistocene ice melt causes rapid eustatic sea-level rise, subsequently flooding these deeply carved coastal troughs.
• Sill Formation: The fjord mouth is usually shallower due to reduced ice erosion and terminal moraine deposition, creating a protective rock threshold.

Factors Making Fjords Picturesque

• Dramatic Vertical Relief: Towering, near-vertical rock walls create a striking geomorphic contrast against deep, tranquil waters (Sognefjord, Norway).
• Hanging Valleys: Tributary glaciers erode less deeply, leaving elevated valleys that produce spectacular, cascading waterfalls (Milford Sound, New Zealand).
• Ecological Juxtaposition: Lush green alpine vegetation and snow-capped mountain peaks directly interface with rich, sheltered marine ecosystems.
• Intricate Geometry: The winding, branching network of narrow glaciated inlets creates constantly shifting, highly dramatic visual vistas.

Fjords stand as magnificent geomorphic testaments to Pleistocene glacial dynamics, holding immense geographical and ecological value while acting as premium drivers of global ecotourism.