Why are tombstones Ina cemetery useful for comparing rates of weathering?

Tombstones in a cemetery provide a controlled environment to study weathering because they are typically made from similar materials and are exposed to the same environmental conditions. By comparing the condition of tombstones of different ages, researchers can assess the rates of weathering and the effects of factors like material composition, orientation, and local climate. This data helps scientists understand how various elements contribute to the degradation of stone over time. Additionally, it allows for the analysis of long-term environmental changes and their impact on human-made structures.