as in regions where tectonic movements of different ages are present, the use of vergence in determination of characteristics of the larger area can be misleading. Despite this, vergence can be used in the description of more complex areas. As an example, changes in minor fold vergence, which occur across major fold areas, can help indicate when a major fold axis has been crossed. Overall, vergence provides a very useful tool to geologists in determining the components of larger-scale areas and structures. References Structural geology