Quantitative analysis tools have become increasingly common in structural geology. Imaging techniques such as computed tomography are used to build highly accurate, three-dimensional models of geological structures. Structural measurements can be facilitated and often accelerated owing to photogrammetric methods of reconstructing the studied outcrops. Geological structures can then be classified using statistical methods. Experimental, analytical, and numerical techniques can be used to develop quantitative mechanical models of rock deformation processes, which are often coupled to chemical, hydrological or thermal processes. With the advent of modern computing power, high-resolution models and systematic simulations are nowadays feasible.