Which process primarily drives cirque erosion deepening the basal region during glacial activity?

💡 Explanation

When glacial ice accumulates in a cirque, abrasion from rotational ice movement occurs because the ice mass grinds against the bedrock floor, deepening and widening the basin. Therefore abrasion is the primary driver of cirque deepening, rather than frost wedging, solifluction or chemical weathering which contribute more to headwall processes.

• Which result occurs when increased acidity inhibits bioturbation?
• Which mechanism reduces surface salinity when increased glacial melt enters the North Atlantic circulation?
• Which mechanism accelerates coastal erosion rates along fjord shorelines with thinning glacial ice?
• Which geologic response commonly follows rapid isostatic rebound after glacial melt near fault lines?
• Which effect does increased saturation have on regions prone to solifluction?
• Which outcome results when El Niño-Southern Oscillation suppresses coastal upwelling in the eastern Pacific Ocean?