Which outcome primarily results when freeze-thaw erodes cirques?

💡 Explanation

Headwall steepening and valley widening occur because frost wedging, a type of mechanical weathering, causes rock fracturing and removal from the cirque walls. This process results in headwall retreat and widening, therefore creating a deeper, wider cirque, rather than other sedimentary deposition.

• Following extreme floodplain sediment deposition, which hydrologic effect encourages oxbow formation?
• Which outcome results when glacial meltwater increases sediment discharge into a proglacial lake?
• Which outcome will occur following pyroclastic surges entering floodplains?
• Which mechanism causes the highest stream discharge rates in mountainous regions dominated by glacial ice?
• Which landscape feature dominates when nivation weathers steep cirque headwalls extensively?
• Which outcome arises when excessive development restricts floodplains near levees?