Which erosional process most directly contributes to the formation and enlargement of a cirque?

💡 Explanation

When a glacier develops in a mountain hollow, abrasion from glacial plucking occurs because ice refreezes around fractured rock, pulling it away, leading to cirque enlargement. Therefore glacial plucking predominates, rather than weathering, dissolution or permafrost thaw, which contribute under different climatic conditions.

• Which outcome occurs from low-pressure cell formation influenced by the Coriolis effect?
• Which process accelerates coastal erosion when rising sea temperatures thaw coastal permafrost?
• Which risk escalates on steep slopes in Arctic regions undergoing active solifluction?
• Which risk greatly increases after rapidly increasing lahar volume?
• Which consequence results when thermokarst thawing weakens Arctic slopes?
• Which risk increases when transverse dune migration accelerates?