How does frost action different from pressure release?

Frost action, also known as freeze-thaw weathering, occurs when water seeps into cracks in rocks, freezes, and expands, causing the rock to fracture over time. In contrast, pressure release, or exfoliation, happens when overlying material is removed (e.g., through erosion), reducing pressure on underlying rock and causing it to expand and crack. While both processes contribute to weathering and rock breakdown, frost action relies on water and temperature changes, whereas pressure release is related to changes in pressure due to the removal of overburden.