Which of the following weathering processes involves the expansion and contraction of outer rock layers due to temperature changes, leading to the peeling off of concentric shells?

💡 Solution & Explanation

Exfoliation is a mechanical weathering process where alternating high and low temperatures cause outer rock layers to expand and contract, eventually breaking off in curved, concentric sheets. Chemical processes like carbonation and hydration alter mineral composition rather than causing thermal shell-peeling. Exfoliation is especially common in arid and semi-arid desert regions with extreme diurnal temperature ranges.