be classified as dextral, when there is apparent clockwise rotation, or sinistral, when there is apparent anticlockwise rotation. Although there is a shared relationship in description of both vergence and fold pairs, they are independent of each other, as vergence is defined as a direction, and not a shape. In fact, the use of vergence in describing the asymmetry of a fold is more useful than simply describing the asymmetry as either S-shaped (sinistral) or Z-shaped (dextral), because vergence is independent of fold plunge variations. Fold plunge variations are relatively common in folds, and based on these variations, two folds with similar asymmetry can be classified differently in terms of the shape being sinistral or dextral based on their fold plunge. This can result in inaccuracies in determining the geometries of folds, and therefore affect the mapping of larger areas. Overall, vergence can be very useful in the analysis of a fold pair, as the vergence can give a better understanding to the geometry of the fold pair, as well as be used to make determinations on the geometry of the larger area surrounding the fold. The vergence of a fold can help a geologist determine several characteristics of folding on a larger scale, including the style, position, and geometry of the folding. By observing vergence in a fold, geologists can record data that can be used in order to calculate the approximate position and geometry of a larger area, and therefore assist geologists in mapping that area. More specifically, geologists use the property of vergence in smaller folds, to determine some of the physical properties of the larger, surrounding area where larger-scale folding is taking place. This is a common practice for geologists and is used in mapping out many areas such as the mapping of the Morcles Nappe in Switzerland. This process is especially useful in some instances, such as in the Otago Schists in New Zealand. Here, the only evidence of existence of large-scale folding in the area, is through the mapping of vergence zones. In areas of simple deformation, vergence can even be used as a tool to locate hinge zones of major folds, as well as the sense of shear. Using vergence as a tool to map out larger zones, should be used with caution in more complex areas where there have been multiple deformations. For instance, in areas of highly metamorphosed rocks, as well