What is a monocline in geological terms?

A monocline is characterized as a fold in geological formations that consists of a single limb that has a steeper slope compared to the other side, which typically remains horizontal or has a gentler incline. This type of structure results from the bending of rock layers due to tectonic forces while maintaining some layers in their original position. Monoclines can often be observed in areas where there is a significant underlying fault or subsurface geological structure causing the deformation on the surface.

This definition highlights a key aspect of monoclines, differentiating them from other types of folds, such as anticlines and synclines, which consist of two limbs that dip in opposite directions. By understanding this unique characteristic of monoclines, it helps to grasp the diverse shapes and forms that geological folds can take when subjected to stress from tectonic activities.