Which mechanism directly initiates cirque formation in orogenic zones?

💡 Explanation

Nivation initiates cirque formation because freeze-thaw cycles mechanically weather and erode bedrock, forming a hollow. This process then allows glacial ice to accumulate and further erode the depression via glacial erosion, rather than tectonic uplift or crustal rebound, which alter landscape elevation.

• Which feedback loop intensifies coastal upwelling when strong offshore winds blow parallel to the shoreline?
• Which process primarily shapes the formation of a lava dome?
• Which weathering outcome increases in arid desert pavements?
• Which outcome occurs when coastal upwelling weakens during ENSO?
• Which enhanced weathering outcome happens after loess deposition?
• Which mechanism amplifies coastal erosion rates along the eastern Pacific coastline during a strong El Niño event?