Which outcome of progressive frost weathering defines cirque formation?

💡 Explanation

Cirques form via nivation and glacial erosion; bergschrund development promotes freeze-thaw, leading to backwall shearing and headwall retreat, therefore deepening and enlarging the cirque rather than creating eskers or kettles.

• Which geologic hazard increases when a dam reservoir fills near a transform fault?
• Which mechanism primarily drives deep ocean thermohaline circulation downwelling in polar regions?
• Which deformation threat arises from saturated permafrost thaw?
• Which landscape outcome results when permafrost prevents drainage, causing soil saturation?
• Which risk increases when saturated soil experiences seismic shear waves during an earthquake?
• Which mechanism causes deep-focus earthquakes within a subducting oceanic plate?