Question

Mechanical processes: Exfoliation (sheet jointing)

a) Chemical weathering
b) Frost action
c) Biological weathering
d) Thermal expansion

Answer 1

Exfoliation, or sheet jointing, is a mechanical weathering process due to expansion and contraction of rock layers caused by heating and cooling.

Step-by-step explanation:

Exfoliation, also known as sheet jointing, is a mechanical weathering process that occurs due to the expansion and contraction of rock layers caused by heating and cooling. This process is primarily influenced by thermal expansion, which is the expansion of rock due to high temperatures, and its subsequent contraction as temperatures decrease. As the layers of rock expand and contract, they may detach and peel away, resulting in the formation of large sheets or slabs of rock.