The process of mechanical weathering wherein overlying rock layers are removed by erosion, causing the underlying rocks to expand and fracture in sheets parallel to the surface, is called:

💡 Solution & Explanation

Exfoliation represents a mechanical weathering process where the removal of overlying rock masses by erosion reduces confining pressure, causing underlying rocks to expand and fracture in parallel sheets. Chemical processes like carbonation and hydration alter the mineral composition of rocks rather than relying on pressure release. Physical geography questions often contrast mechanical weathering processes with chemical weathering agents.