What is the mechanical weathering process characterized by the splitting off of slab-like sheets of rock?

What is the mechanical weathering process characterized by the splitting off of slab-like sheets of rock?

• A. Sheeting
• B. Frost Wedging
• C. Exfoliation
• D. Thermal Expansion

Answer: (A)

This is about a mechanical weathering process that causes rock to peel away in large, sheet-like slabs. The term that fits this description is sheeting, a form of exfoliation where slabs split off parallel to the rock surface. This happens when overlying material is removed (uplift or erosion), relieving confining pressure. The rock expands slightly and fractures develop parallel to the surface, allowing broad sheets to peel away, often creating smooth, dome-like rock faces. Frost wedging, by contrast, relies on ice expanding in cracks to push blocks apart and typically produces blocky fragments rather than continuous sheets. Thermal expansion involves cracking from heating and cooling cycles but not the characteristic peeling of large slabs. Exfoliation is the broader idea of peeling layers from a rock, but sheeting specifically describes the slab-like peeling described in the question.

This is about a mechanical weathering process that causes rock to peel away in large, sheet-like slabs. The term that fits this description is sheeting, a form of exfoliation where slabs split off parallel to the rock surface. This happens when overlying material is removed (uplift or erosion), relieving confining pressure. The rock expands slightly and fractures develop parallel to the surface, allowing broad sheets to peel away, often creating smooth, dome-like rock faces.

Frost wedging, by contrast, relies on ice expanding in cracks to push blocks apart and typically produces blocky fragments rather than continuous sheets. Thermal expansion involves cracking from heating and cooling cycles but not the characteristic peeling of large slabs. Exfoliation is the broader idea of peeling layers from a rock, but sheeting specifically describes the slab-like peeling described in the question.