Why might past geological changes be relevant in tree risk assessments?

Past geological changes are relevant in tree risk assessments because they provide critical insights into the historical stability of a tree and its environment. Understanding the geological history of an area can reveal patterns of soil erosion, sediment deposition, and geological stability or instability. This information helps assess how often and to what extent similar geological events might occur in the future.

For instance, if a certain area has a history of landslides or earthquakes, trees in that region may be at a higher risk due to the potential for terrain disruption. By examining these historical patterns, assessors can anticipate future risks based on past events, which leads to a more informed evaluation of a tree's stability and the risk it may pose to structures or people nearby.

This context is essential for a thorough risk assessment, allowing professionals to take into account not just the current conditions of the tree but also the environmental history that could impact its safety moving forward.