Which process primarily drives the formation of a deep fjord from a pre-existing U-shaped glacial valley?

💡 Explanation

When sea level rises, marine transgression occurs as the ocean floods the previously glaciated valley because glacial erosion left it deeper than the current sea level. Therefore a fjord results, rather than rebound, weathering, or river alteration, each from substantially different causes.

• Which mechanism causes stream channel incision when tectonic uplift increases land slope?
• Which risk increases following a large subduction-zone earthquake in coastal regions?
• Which effect accelerates karren formation on limestone outcrops?
• Which outcome occurs when a subducting oceanic plate hydrates?
• Which mechanism initiates earthquake rupture propagation during strike-slip fault movement?
• Which effect occurs when trade winds weaken in the Pacific Ocean?